2 * Copyright © 2012 Intel Corporation
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
11 * The above copyright notice and this permission notice (including the next
12 * paragraph) shall be included in all copies or substantial portions of the
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
24 * Eugeni Dodonov <eugeni.dodonov@intel.com>
28 #include <linux/cpufreq.h>
30 #include "intel_drv.h"
31 #include "../../../platform/x86/intel_ips.h"
32 #include <linux/module.h>
33 #include <linux/vgaarb.h>
34 #include <drm/i915_powerwell.h>
35 #include <linux/pm_runtime.h>
38 * RC6 is a special power stage which allows the GPU to enter an very
39 * low-voltage mode when idle, using down to 0V while at this stage. This
40 * stage is entered automatically when the GPU is idle when RC6 support is
41 * enabled, and as soon as new workload arises GPU wakes up automatically as well.
43 * There are different RC6 modes available in Intel GPU, which differentiate
44 * among each other with the latency required to enter and leave RC6 and
45 * voltage consumed by the GPU in different states.
47 * The combination of the following flags define which states GPU is allowed
48 * to enter, while RC6 is the normal RC6 state, RC6p is the deep RC6, and
49 * RC6pp is deepest RC6. Their support by hardware varies according to the
50 * GPU, BIOS, chipset and platform. RC6 is usually the safest one and the one
51 * which brings the most power savings; deeper states save more power, but
52 * require higher latency to switch to and wake up.
54 #define INTEL_RC6_ENABLE (1<<0)
55 #define INTEL_RC6p_ENABLE (1<<1)
56 #define INTEL_RC6pp_ENABLE (1<<2)
58 /* FBC, or Frame Buffer Compression, is a technique employed to compress the
59 * framebuffer contents in-memory, aiming at reducing the required bandwidth
60 * during in-memory transfers and, therefore, reduce the power packet.
62 * The benefits of FBC are mostly visible with solid backgrounds and
63 * variation-less patterns.
65 * FBC-related functionality can be enabled by the means of the
66 * i915.i915_enable_fbc parameter
69 static void i8xx_disable_fbc(struct drm_device *dev)
71 struct drm_i915_private *dev_priv = dev->dev_private;
74 /* Disable compression */
75 fbc_ctl = I915_READ(FBC_CONTROL);
76 if ((fbc_ctl & FBC_CTL_EN) == 0)
79 fbc_ctl &= ~FBC_CTL_EN;
80 I915_WRITE(FBC_CONTROL, fbc_ctl);
82 /* Wait for compressing bit to clear */
83 if (wait_for((I915_READ(FBC_STATUS) & FBC_STAT_COMPRESSING) == 0, 10)) {
84 DRM_DEBUG_KMS("FBC idle timed out\n");
88 DRM_DEBUG_KMS("disabled FBC\n");
91 static void i8xx_enable_fbc(struct drm_crtc *crtc)
93 struct drm_device *dev = crtc->dev;
94 struct drm_i915_private *dev_priv = dev->dev_private;
95 struct drm_framebuffer *fb = crtc->primary->fb;
96 struct drm_i915_gem_object *obj = intel_fb_obj(fb);
97 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
102 cfb_pitch = dev_priv->fbc.size / FBC_LL_SIZE;
103 if (fb->pitches[0] < cfb_pitch)
104 cfb_pitch = fb->pitches[0];
106 /* FBC_CTL wants 32B or 64B units */
108 cfb_pitch = (cfb_pitch / 32) - 1;
110 cfb_pitch = (cfb_pitch / 64) - 1;
113 for (i = 0; i < (FBC_LL_SIZE / 32) + 1; i++)
114 I915_WRITE(FBC_TAG + (i * 4), 0);
120 fbc_ctl2 = FBC_CTL_FENCE_DBL | FBC_CTL_IDLE_IMM | FBC_CTL_CPU_FENCE;
121 fbc_ctl2 |= FBC_CTL_PLANE(intel_crtc->plane);
122 I915_WRITE(FBC_CONTROL2, fbc_ctl2);
123 I915_WRITE(FBC_FENCE_OFF, crtc->y);
127 fbc_ctl = I915_READ(FBC_CONTROL);
128 fbc_ctl &= 0x3fff << FBC_CTL_INTERVAL_SHIFT;
129 fbc_ctl |= FBC_CTL_EN | FBC_CTL_PERIODIC;
131 fbc_ctl |= FBC_CTL_C3_IDLE; /* 945 needs special SR handling */
132 fbc_ctl |= (cfb_pitch & 0xff) << FBC_CTL_STRIDE_SHIFT;
133 fbc_ctl |= obj->fence_reg;
134 I915_WRITE(FBC_CONTROL, fbc_ctl);
136 DRM_DEBUG_KMS("enabled FBC, pitch %d, yoff %d, plane %c\n",
137 cfb_pitch, crtc->y, plane_name(intel_crtc->plane));
140 static bool i8xx_fbc_enabled(struct drm_device *dev)
142 struct drm_i915_private *dev_priv = dev->dev_private;
144 return I915_READ(FBC_CONTROL) & FBC_CTL_EN;
147 static void g4x_enable_fbc(struct drm_crtc *crtc)
149 struct drm_device *dev = crtc->dev;
150 struct drm_i915_private *dev_priv = dev->dev_private;
151 struct drm_framebuffer *fb = crtc->primary->fb;
152 struct drm_i915_gem_object *obj = intel_fb_obj(fb);
153 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
156 dpfc_ctl = DPFC_CTL_PLANE(intel_crtc->plane) | DPFC_SR_EN;
157 if (drm_format_plane_cpp(fb->pixel_format, 0) == 2)
158 dpfc_ctl |= DPFC_CTL_LIMIT_2X;
160 dpfc_ctl |= DPFC_CTL_LIMIT_1X;
161 dpfc_ctl |= DPFC_CTL_FENCE_EN | obj->fence_reg;
163 I915_WRITE(DPFC_FENCE_YOFF, crtc->y);
166 I915_WRITE(DPFC_CONTROL, dpfc_ctl | DPFC_CTL_EN);
168 DRM_DEBUG_KMS("enabled fbc on plane %c\n", plane_name(intel_crtc->plane));
171 static void g4x_disable_fbc(struct drm_device *dev)
173 struct drm_i915_private *dev_priv = dev->dev_private;
176 /* Disable compression */
177 dpfc_ctl = I915_READ(DPFC_CONTROL);
178 if (dpfc_ctl & DPFC_CTL_EN) {
179 dpfc_ctl &= ~DPFC_CTL_EN;
180 I915_WRITE(DPFC_CONTROL, dpfc_ctl);
182 DRM_DEBUG_KMS("disabled FBC\n");
186 static bool g4x_fbc_enabled(struct drm_device *dev)
188 struct drm_i915_private *dev_priv = dev->dev_private;
190 return I915_READ(DPFC_CONTROL) & DPFC_CTL_EN;
193 static void sandybridge_blit_fbc_update(struct drm_device *dev)
195 struct drm_i915_private *dev_priv = dev->dev_private;
198 /* Make sure blitter notifies FBC of writes */
200 /* Blitter is part of Media powerwell on VLV. No impact of
201 * his param in other platforms for now */
202 gen6_gt_force_wake_get(dev_priv, FORCEWAKE_MEDIA);
204 blt_ecoskpd = I915_READ(GEN6_BLITTER_ECOSKPD);
205 blt_ecoskpd |= GEN6_BLITTER_FBC_NOTIFY <<
206 GEN6_BLITTER_LOCK_SHIFT;
207 I915_WRITE(GEN6_BLITTER_ECOSKPD, blt_ecoskpd);
208 blt_ecoskpd |= GEN6_BLITTER_FBC_NOTIFY;
209 I915_WRITE(GEN6_BLITTER_ECOSKPD, blt_ecoskpd);
210 blt_ecoskpd &= ~(GEN6_BLITTER_FBC_NOTIFY <<
211 GEN6_BLITTER_LOCK_SHIFT);
212 I915_WRITE(GEN6_BLITTER_ECOSKPD, blt_ecoskpd);
213 POSTING_READ(GEN6_BLITTER_ECOSKPD);
215 gen6_gt_force_wake_put(dev_priv, FORCEWAKE_MEDIA);
218 static void ironlake_enable_fbc(struct drm_crtc *crtc)
220 struct drm_device *dev = crtc->dev;
221 struct drm_i915_private *dev_priv = dev->dev_private;
222 struct drm_framebuffer *fb = crtc->primary->fb;
223 struct drm_i915_gem_object *obj = intel_fb_obj(fb);
224 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
227 dpfc_ctl = DPFC_CTL_PLANE(intel_crtc->plane);
228 if (drm_format_plane_cpp(fb->pixel_format, 0) == 2)
229 dev_priv->fbc.threshold++;
231 switch (dev_priv->fbc.threshold) {
234 dpfc_ctl |= DPFC_CTL_LIMIT_4X;
237 dpfc_ctl |= DPFC_CTL_LIMIT_2X;
240 dpfc_ctl |= DPFC_CTL_LIMIT_1X;
243 dpfc_ctl |= DPFC_CTL_FENCE_EN;
245 dpfc_ctl |= obj->fence_reg;
247 I915_WRITE(ILK_DPFC_FENCE_YOFF, crtc->y);
248 I915_WRITE(ILK_FBC_RT_BASE, i915_gem_obj_ggtt_offset(obj) | ILK_FBC_RT_VALID);
250 I915_WRITE(ILK_DPFC_CONTROL, dpfc_ctl | DPFC_CTL_EN);
253 I915_WRITE(SNB_DPFC_CTL_SA,
254 SNB_CPU_FENCE_ENABLE | obj->fence_reg);
255 I915_WRITE(DPFC_CPU_FENCE_OFFSET, crtc->y);
256 sandybridge_blit_fbc_update(dev);
259 DRM_DEBUG_KMS("enabled fbc on plane %c\n", plane_name(intel_crtc->plane));
262 static void ironlake_disable_fbc(struct drm_device *dev)
264 struct drm_i915_private *dev_priv = dev->dev_private;
267 /* Disable compression */
268 dpfc_ctl = I915_READ(ILK_DPFC_CONTROL);
269 if (dpfc_ctl & DPFC_CTL_EN) {
270 dpfc_ctl &= ~DPFC_CTL_EN;
271 I915_WRITE(ILK_DPFC_CONTROL, dpfc_ctl);
273 DRM_DEBUG_KMS("disabled FBC\n");
277 static bool ironlake_fbc_enabled(struct drm_device *dev)
279 struct drm_i915_private *dev_priv = dev->dev_private;
281 return I915_READ(ILK_DPFC_CONTROL) & DPFC_CTL_EN;
284 static void gen7_enable_fbc(struct drm_crtc *crtc)
286 struct drm_device *dev = crtc->dev;
287 struct drm_i915_private *dev_priv = dev->dev_private;
288 struct drm_framebuffer *fb = crtc->primary->fb;
289 struct drm_i915_gem_object *obj = intel_fb_obj(fb);
290 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
293 dpfc_ctl = IVB_DPFC_CTL_PLANE(intel_crtc->plane);
294 if (drm_format_plane_cpp(fb->pixel_format, 0) == 2)
295 dev_priv->fbc.threshold++;
297 switch (dev_priv->fbc.threshold) {
300 dpfc_ctl |= DPFC_CTL_LIMIT_4X;
303 dpfc_ctl |= DPFC_CTL_LIMIT_2X;
306 dpfc_ctl |= DPFC_CTL_LIMIT_1X;
310 dpfc_ctl |= IVB_DPFC_CTL_FENCE_EN;
312 if (dev_priv->fbc.false_color)
313 dpfc_ctl |= FBC_CTL_FALSE_COLOR;
315 I915_WRITE(ILK_DPFC_CONTROL, dpfc_ctl | DPFC_CTL_EN);
317 if (IS_IVYBRIDGE(dev)) {
318 /* WaFbcAsynchFlipDisableFbcQueue:ivb */
319 I915_WRITE(ILK_DISPLAY_CHICKEN1,
320 I915_READ(ILK_DISPLAY_CHICKEN1) |
323 /* WaFbcAsynchFlipDisableFbcQueue:hsw,bdw */
324 I915_WRITE(CHICKEN_PIPESL_1(intel_crtc->pipe),
325 I915_READ(CHICKEN_PIPESL_1(intel_crtc->pipe)) |
329 I915_WRITE(SNB_DPFC_CTL_SA,
330 SNB_CPU_FENCE_ENABLE | obj->fence_reg);
331 I915_WRITE(DPFC_CPU_FENCE_OFFSET, crtc->y);
333 sandybridge_blit_fbc_update(dev);
335 DRM_DEBUG_KMS("enabled fbc on plane %c\n", plane_name(intel_crtc->plane));
338 bool intel_fbc_enabled(struct drm_device *dev)
340 struct drm_i915_private *dev_priv = dev->dev_private;
342 if (!dev_priv->display.fbc_enabled)
345 return dev_priv->display.fbc_enabled(dev);
348 static void intel_fbc_work_fn(struct work_struct *__work)
350 struct intel_fbc_work *work =
351 container_of(to_delayed_work(__work),
352 struct intel_fbc_work, work);
353 struct drm_device *dev = work->crtc->dev;
354 struct drm_i915_private *dev_priv = dev->dev_private;
356 mutex_lock(&dev->struct_mutex);
357 if (work == dev_priv->fbc.fbc_work) {
358 /* Double check that we haven't switched fb without cancelling
361 if (work->crtc->primary->fb == work->fb) {
362 dev_priv->display.enable_fbc(work->crtc);
364 dev_priv->fbc.plane = to_intel_crtc(work->crtc)->plane;
365 dev_priv->fbc.fb_id = work->crtc->primary->fb->base.id;
366 dev_priv->fbc.y = work->crtc->y;
369 dev_priv->fbc.fbc_work = NULL;
371 mutex_unlock(&dev->struct_mutex);
376 static void intel_cancel_fbc_work(struct drm_i915_private *dev_priv)
378 if (dev_priv->fbc.fbc_work == NULL)
381 DRM_DEBUG_KMS("cancelling pending FBC enable\n");
383 /* Synchronisation is provided by struct_mutex and checking of
384 * dev_priv->fbc.fbc_work, so we can perform the cancellation
385 * entirely asynchronously.
387 if (cancel_delayed_work(&dev_priv->fbc.fbc_work->work))
388 /* tasklet was killed before being run, clean up */
389 kfree(dev_priv->fbc.fbc_work);
391 /* Mark the work as no longer wanted so that if it does
392 * wake-up (because the work was already running and waiting
393 * for our mutex), it will discover that is no longer
396 dev_priv->fbc.fbc_work = NULL;
399 static void intel_enable_fbc(struct drm_crtc *crtc)
401 struct intel_fbc_work *work;
402 struct drm_device *dev = crtc->dev;
403 struct drm_i915_private *dev_priv = dev->dev_private;
405 if (!dev_priv->display.enable_fbc)
408 intel_cancel_fbc_work(dev_priv);
410 work = kzalloc(sizeof(*work), GFP_KERNEL);
412 DRM_ERROR("Failed to allocate FBC work structure\n");
413 dev_priv->display.enable_fbc(crtc);
418 work->fb = crtc->primary->fb;
419 INIT_DELAYED_WORK(&work->work, intel_fbc_work_fn);
421 dev_priv->fbc.fbc_work = work;
423 /* Delay the actual enabling to let pageflipping cease and the
424 * display to settle before starting the compression. Note that
425 * this delay also serves a second purpose: it allows for a
426 * vblank to pass after disabling the FBC before we attempt
427 * to modify the control registers.
429 * A more complicated solution would involve tracking vblanks
430 * following the termination of the page-flipping sequence
431 * and indeed performing the enable as a co-routine and not
432 * waiting synchronously upon the vblank.
434 * WaFbcWaitForVBlankBeforeEnable:ilk,snb
436 schedule_delayed_work(&work->work, msecs_to_jiffies(50));
439 void intel_disable_fbc(struct drm_device *dev)
441 struct drm_i915_private *dev_priv = dev->dev_private;
443 intel_cancel_fbc_work(dev_priv);
445 if (!dev_priv->display.disable_fbc)
448 dev_priv->display.disable_fbc(dev);
449 dev_priv->fbc.plane = -1;
452 static bool set_no_fbc_reason(struct drm_i915_private *dev_priv,
453 enum no_fbc_reason reason)
455 if (dev_priv->fbc.no_fbc_reason == reason)
458 dev_priv->fbc.no_fbc_reason = reason;
463 * intel_update_fbc - enable/disable FBC as needed
464 * @dev: the drm_device
466 * Set up the framebuffer compression hardware at mode set time. We
467 * enable it if possible:
468 * - plane A only (on pre-965)
469 * - no pixel mulitply/line duplication
470 * - no alpha buffer discard
472 * - framebuffer <= max_hdisplay in width, max_vdisplay in height
474 * We can't assume that any compression will take place (worst case),
475 * so the compressed buffer has to be the same size as the uncompressed
476 * one. It also must reside (along with the line length buffer) in
479 * We need to enable/disable FBC on a global basis.
481 void intel_update_fbc(struct drm_device *dev)
483 struct drm_i915_private *dev_priv = dev->dev_private;
484 struct drm_crtc *crtc = NULL, *tmp_crtc;
485 struct intel_crtc *intel_crtc;
486 struct drm_framebuffer *fb;
487 struct drm_i915_gem_object *obj;
488 const struct drm_display_mode *adjusted_mode;
489 unsigned int max_width, max_height;
492 set_no_fbc_reason(dev_priv, FBC_UNSUPPORTED);
496 if (!i915.powersave) {
497 if (set_no_fbc_reason(dev_priv, FBC_MODULE_PARAM))
498 DRM_DEBUG_KMS("fbc disabled per module param\n");
503 * If FBC is already on, we just have to verify that we can
504 * keep it that way...
505 * Need to disable if:
506 * - more than one pipe is active
507 * - changing FBC params (stride, fence, mode)
508 * - new fb is too large to fit in compressed buffer
509 * - going to an unsupported config (interlace, pixel multiply, etc.)
511 for_each_crtc(dev, tmp_crtc) {
512 if (intel_crtc_active(tmp_crtc) &&
513 to_intel_crtc(tmp_crtc)->primary_enabled) {
515 if (set_no_fbc_reason(dev_priv, FBC_MULTIPLE_PIPES))
516 DRM_DEBUG_KMS("more than one pipe active, disabling compression\n");
523 if (!crtc || crtc->primary->fb == NULL) {
524 if (set_no_fbc_reason(dev_priv, FBC_NO_OUTPUT))
525 DRM_DEBUG_KMS("no output, disabling\n");
529 intel_crtc = to_intel_crtc(crtc);
530 fb = crtc->primary->fb;
531 obj = intel_fb_obj(fb);
532 adjusted_mode = &intel_crtc->config.adjusted_mode;
534 if (i915.enable_fbc < 0) {
535 if (set_no_fbc_reason(dev_priv, FBC_CHIP_DEFAULT))
536 DRM_DEBUG_KMS("disabled per chip default\n");
539 if (!i915.enable_fbc) {
540 if (set_no_fbc_reason(dev_priv, FBC_MODULE_PARAM))
541 DRM_DEBUG_KMS("fbc disabled per module param\n");
544 if ((adjusted_mode->flags & DRM_MODE_FLAG_INTERLACE) ||
545 (adjusted_mode->flags & DRM_MODE_FLAG_DBLSCAN)) {
546 if (set_no_fbc_reason(dev_priv, FBC_UNSUPPORTED_MODE))
547 DRM_DEBUG_KMS("mode incompatible with compression, "
552 if (INTEL_INFO(dev)->gen >= 8 || IS_HASWELL(dev)) {
555 } else if (IS_G4X(dev) || INTEL_INFO(dev)->gen >= 5) {
562 if (intel_crtc->config.pipe_src_w > max_width ||
563 intel_crtc->config.pipe_src_h > max_height) {
564 if (set_no_fbc_reason(dev_priv, FBC_MODE_TOO_LARGE))
565 DRM_DEBUG_KMS("mode too large for compression, disabling\n");
568 if ((INTEL_INFO(dev)->gen < 4 || HAS_DDI(dev)) &&
569 intel_crtc->plane != PLANE_A) {
570 if (set_no_fbc_reason(dev_priv, FBC_BAD_PLANE))
571 DRM_DEBUG_KMS("plane not A, disabling compression\n");
575 /* The use of a CPU fence is mandatory in order to detect writes
576 * by the CPU to the scanout and trigger updates to the FBC.
578 if (obj->tiling_mode != I915_TILING_X ||
579 obj->fence_reg == I915_FENCE_REG_NONE) {
580 if (set_no_fbc_reason(dev_priv, FBC_NOT_TILED))
581 DRM_DEBUG_KMS("framebuffer not tiled or fenced, disabling compression\n");
585 /* If the kernel debugger is active, always disable compression */
589 if (i915_gem_stolen_setup_compression(dev, obj->base.size,
590 drm_format_plane_cpp(fb->pixel_format, 0))) {
591 if (set_no_fbc_reason(dev_priv, FBC_STOLEN_TOO_SMALL))
592 DRM_DEBUG_KMS("framebuffer too large, disabling compression\n");
596 /* If the scanout has not changed, don't modify the FBC settings.
597 * Note that we make the fundamental assumption that the fb->obj
598 * cannot be unpinned (and have its GTT offset and fence revoked)
599 * without first being decoupled from the scanout and FBC disabled.
601 if (dev_priv->fbc.plane == intel_crtc->plane &&
602 dev_priv->fbc.fb_id == fb->base.id &&
603 dev_priv->fbc.y == crtc->y)
606 if (intel_fbc_enabled(dev)) {
607 /* We update FBC along two paths, after changing fb/crtc
608 * configuration (modeswitching) and after page-flipping
609 * finishes. For the latter, we know that not only did
610 * we disable the FBC at the start of the page-flip
611 * sequence, but also more than one vblank has passed.
613 * For the former case of modeswitching, it is possible
614 * to switch between two FBC valid configurations
615 * instantaneously so we do need to disable the FBC
616 * before we can modify its control registers. We also
617 * have to wait for the next vblank for that to take
618 * effect. However, since we delay enabling FBC we can
619 * assume that a vblank has passed since disabling and
620 * that we can safely alter the registers in the deferred
623 * In the scenario that we go from a valid to invalid
624 * and then back to valid FBC configuration we have
625 * no strict enforcement that a vblank occurred since
626 * disabling the FBC. However, along all current pipe
627 * disabling paths we do need to wait for a vblank at
628 * some point. And we wait before enabling FBC anyway.
630 DRM_DEBUG_KMS("disabling active FBC for update\n");
631 intel_disable_fbc(dev);
634 intel_enable_fbc(crtc);
635 dev_priv->fbc.no_fbc_reason = FBC_OK;
639 /* Multiple disables should be harmless */
640 if (intel_fbc_enabled(dev)) {
641 DRM_DEBUG_KMS("unsupported config, disabling FBC\n");
642 intel_disable_fbc(dev);
644 i915_gem_stolen_cleanup_compression(dev);
647 static void i915_pineview_get_mem_freq(struct drm_device *dev)
649 struct drm_i915_private *dev_priv = dev->dev_private;
652 tmp = I915_READ(CLKCFG);
654 switch (tmp & CLKCFG_FSB_MASK) {
656 dev_priv->fsb_freq = 533; /* 133*4 */
659 dev_priv->fsb_freq = 800; /* 200*4 */
662 dev_priv->fsb_freq = 667; /* 167*4 */
665 dev_priv->fsb_freq = 400; /* 100*4 */
669 switch (tmp & CLKCFG_MEM_MASK) {
671 dev_priv->mem_freq = 533;
674 dev_priv->mem_freq = 667;
677 dev_priv->mem_freq = 800;
681 /* detect pineview DDR3 setting */
682 tmp = I915_READ(CSHRDDR3CTL);
683 dev_priv->is_ddr3 = (tmp & CSHRDDR3CTL_DDR3) ? 1 : 0;
686 static void i915_ironlake_get_mem_freq(struct drm_device *dev)
688 struct drm_i915_private *dev_priv = dev->dev_private;
691 ddrpll = I915_READ16(DDRMPLL1);
692 csipll = I915_READ16(CSIPLL0);
694 switch (ddrpll & 0xff) {
696 dev_priv->mem_freq = 800;
699 dev_priv->mem_freq = 1066;
702 dev_priv->mem_freq = 1333;
705 dev_priv->mem_freq = 1600;
708 DRM_DEBUG_DRIVER("unknown memory frequency 0x%02x\n",
710 dev_priv->mem_freq = 0;
714 dev_priv->ips.r_t = dev_priv->mem_freq;
716 switch (csipll & 0x3ff) {
718 dev_priv->fsb_freq = 3200;
721 dev_priv->fsb_freq = 3733;
724 dev_priv->fsb_freq = 4266;
727 dev_priv->fsb_freq = 4800;
730 dev_priv->fsb_freq = 5333;
733 dev_priv->fsb_freq = 5866;
736 dev_priv->fsb_freq = 6400;
739 DRM_DEBUG_DRIVER("unknown fsb frequency 0x%04x\n",
741 dev_priv->fsb_freq = 0;
745 if (dev_priv->fsb_freq == 3200) {
746 dev_priv->ips.c_m = 0;
747 } else if (dev_priv->fsb_freq > 3200 && dev_priv->fsb_freq <= 4800) {
748 dev_priv->ips.c_m = 1;
750 dev_priv->ips.c_m = 2;
754 static const struct cxsr_latency cxsr_latency_table[] = {
755 {1, 0, 800, 400, 3382, 33382, 3983, 33983}, /* DDR2-400 SC */
756 {1, 0, 800, 667, 3354, 33354, 3807, 33807}, /* DDR2-667 SC */
757 {1, 0, 800, 800, 3347, 33347, 3763, 33763}, /* DDR2-800 SC */
758 {1, 1, 800, 667, 6420, 36420, 6873, 36873}, /* DDR3-667 SC */
759 {1, 1, 800, 800, 5902, 35902, 6318, 36318}, /* DDR3-800 SC */
761 {1, 0, 667, 400, 3400, 33400, 4021, 34021}, /* DDR2-400 SC */
762 {1, 0, 667, 667, 3372, 33372, 3845, 33845}, /* DDR2-667 SC */
763 {1, 0, 667, 800, 3386, 33386, 3822, 33822}, /* DDR2-800 SC */
764 {1, 1, 667, 667, 6438, 36438, 6911, 36911}, /* DDR3-667 SC */
765 {1, 1, 667, 800, 5941, 35941, 6377, 36377}, /* DDR3-800 SC */
767 {1, 0, 400, 400, 3472, 33472, 4173, 34173}, /* DDR2-400 SC */
768 {1, 0, 400, 667, 3443, 33443, 3996, 33996}, /* DDR2-667 SC */
769 {1, 0, 400, 800, 3430, 33430, 3946, 33946}, /* DDR2-800 SC */
770 {1, 1, 400, 667, 6509, 36509, 7062, 37062}, /* DDR3-667 SC */
771 {1, 1, 400, 800, 5985, 35985, 6501, 36501}, /* DDR3-800 SC */
773 {0, 0, 800, 400, 3438, 33438, 4065, 34065}, /* DDR2-400 SC */
774 {0, 0, 800, 667, 3410, 33410, 3889, 33889}, /* DDR2-667 SC */
775 {0, 0, 800, 800, 3403, 33403, 3845, 33845}, /* DDR2-800 SC */
776 {0, 1, 800, 667, 6476, 36476, 6955, 36955}, /* DDR3-667 SC */
777 {0, 1, 800, 800, 5958, 35958, 6400, 36400}, /* DDR3-800 SC */
779 {0, 0, 667, 400, 3456, 33456, 4103, 34106}, /* DDR2-400 SC */
780 {0, 0, 667, 667, 3428, 33428, 3927, 33927}, /* DDR2-667 SC */
781 {0, 0, 667, 800, 3443, 33443, 3905, 33905}, /* DDR2-800 SC */
782 {0, 1, 667, 667, 6494, 36494, 6993, 36993}, /* DDR3-667 SC */
783 {0, 1, 667, 800, 5998, 35998, 6460, 36460}, /* DDR3-800 SC */
785 {0, 0, 400, 400, 3528, 33528, 4255, 34255}, /* DDR2-400 SC */
786 {0, 0, 400, 667, 3500, 33500, 4079, 34079}, /* DDR2-667 SC */
787 {0, 0, 400, 800, 3487, 33487, 4029, 34029}, /* DDR2-800 SC */
788 {0, 1, 400, 667, 6566, 36566, 7145, 37145}, /* DDR3-667 SC */
789 {0, 1, 400, 800, 6042, 36042, 6584, 36584}, /* DDR3-800 SC */
792 static const struct cxsr_latency *intel_get_cxsr_latency(int is_desktop,
797 const struct cxsr_latency *latency;
800 if (fsb == 0 || mem == 0)
803 for (i = 0; i < ARRAY_SIZE(cxsr_latency_table); i++) {
804 latency = &cxsr_latency_table[i];
805 if (is_desktop == latency->is_desktop &&
806 is_ddr3 == latency->is_ddr3 &&
807 fsb == latency->fsb_freq && mem == latency->mem_freq)
811 DRM_DEBUG_KMS("Unknown FSB/MEM found, disable CxSR\n");
816 void intel_set_memory_cxsr(struct drm_i915_private *dev_priv, bool enable)
818 struct drm_device *dev = dev_priv->dev;
821 if (IS_VALLEYVIEW(dev)) {
822 I915_WRITE(FW_BLC_SELF_VLV, enable ? FW_CSPWRDWNEN : 0);
823 } else if (IS_G4X(dev) || IS_CRESTLINE(dev)) {
824 I915_WRITE(FW_BLC_SELF, enable ? FW_BLC_SELF_EN : 0);
825 } else if (IS_PINEVIEW(dev)) {
826 val = I915_READ(DSPFW3) & ~PINEVIEW_SELF_REFRESH_EN;
827 val |= enable ? PINEVIEW_SELF_REFRESH_EN : 0;
828 I915_WRITE(DSPFW3, val);
829 } else if (IS_I945G(dev) || IS_I945GM(dev)) {
830 val = enable ? _MASKED_BIT_ENABLE(FW_BLC_SELF_EN) :
831 _MASKED_BIT_DISABLE(FW_BLC_SELF_EN);
832 I915_WRITE(FW_BLC_SELF, val);
833 } else if (IS_I915GM(dev)) {
834 val = enable ? _MASKED_BIT_ENABLE(INSTPM_SELF_EN) :
835 _MASKED_BIT_DISABLE(INSTPM_SELF_EN);
836 I915_WRITE(INSTPM, val);
841 DRM_DEBUG_KMS("memory self-refresh is %s\n",
842 enable ? "enabled" : "disabled");
846 * Latency for FIFO fetches is dependent on several factors:
847 * - memory configuration (speed, channels)
849 * - current MCH state
850 * It can be fairly high in some situations, so here we assume a fairly
851 * pessimal value. It's a tradeoff between extra memory fetches (if we
852 * set this value too high, the FIFO will fetch frequently to stay full)
853 * and power consumption (set it too low to save power and we might see
854 * FIFO underruns and display "flicker").
856 * A value of 5us seems to be a good balance; safe for very low end
857 * platforms but not overly aggressive on lower latency configs.
859 static const int latency_ns = 5000;
861 static int i9xx_get_fifo_size(struct drm_device *dev, int plane)
863 struct drm_i915_private *dev_priv = dev->dev_private;
864 uint32_t dsparb = I915_READ(DSPARB);
867 size = dsparb & 0x7f;
869 size = ((dsparb >> DSPARB_CSTART_SHIFT) & 0x7f) - size;
871 DRM_DEBUG_KMS("FIFO size - (0x%08x) %s: %d\n", dsparb,
872 plane ? "B" : "A", size);
877 static int i830_get_fifo_size(struct drm_device *dev, int plane)
879 struct drm_i915_private *dev_priv = dev->dev_private;
880 uint32_t dsparb = I915_READ(DSPARB);
883 size = dsparb & 0x1ff;
885 size = ((dsparb >> DSPARB_BEND_SHIFT) & 0x1ff) - size;
886 size >>= 1; /* Convert to cachelines */
888 DRM_DEBUG_KMS("FIFO size - (0x%08x) %s: %d\n", dsparb,
889 plane ? "B" : "A", size);
894 static int i845_get_fifo_size(struct drm_device *dev, int plane)
896 struct drm_i915_private *dev_priv = dev->dev_private;
897 uint32_t dsparb = I915_READ(DSPARB);
900 size = dsparb & 0x7f;
901 size >>= 2; /* Convert to cachelines */
903 DRM_DEBUG_KMS("FIFO size - (0x%08x) %s: %d\n", dsparb,
910 /* Pineview has different values for various configs */
911 static const struct intel_watermark_params pineview_display_wm = {
912 .fifo_size = PINEVIEW_DISPLAY_FIFO,
913 .max_wm = PINEVIEW_MAX_WM,
914 .default_wm = PINEVIEW_DFT_WM,
915 .guard_size = PINEVIEW_GUARD_WM,
916 .cacheline_size = PINEVIEW_FIFO_LINE_SIZE,
918 static const struct intel_watermark_params pineview_display_hplloff_wm = {
919 .fifo_size = PINEVIEW_DISPLAY_FIFO,
920 .max_wm = PINEVIEW_MAX_WM,
921 .default_wm = PINEVIEW_DFT_HPLLOFF_WM,
922 .guard_size = PINEVIEW_GUARD_WM,
923 .cacheline_size = PINEVIEW_FIFO_LINE_SIZE,
925 static const struct intel_watermark_params pineview_cursor_wm = {
926 .fifo_size = PINEVIEW_CURSOR_FIFO,
927 .max_wm = PINEVIEW_CURSOR_MAX_WM,
928 .default_wm = PINEVIEW_CURSOR_DFT_WM,
929 .guard_size = PINEVIEW_CURSOR_GUARD_WM,
930 .cacheline_size = PINEVIEW_FIFO_LINE_SIZE,
932 static const struct intel_watermark_params pineview_cursor_hplloff_wm = {
933 .fifo_size = PINEVIEW_CURSOR_FIFO,
934 .max_wm = PINEVIEW_CURSOR_MAX_WM,
935 .default_wm = PINEVIEW_CURSOR_DFT_WM,
936 .guard_size = PINEVIEW_CURSOR_GUARD_WM,
937 .cacheline_size = PINEVIEW_FIFO_LINE_SIZE,
939 static const struct intel_watermark_params g4x_wm_info = {
940 .fifo_size = G4X_FIFO_SIZE,
941 .max_wm = G4X_MAX_WM,
942 .default_wm = G4X_MAX_WM,
944 .cacheline_size = G4X_FIFO_LINE_SIZE,
946 static const struct intel_watermark_params g4x_cursor_wm_info = {
947 .fifo_size = I965_CURSOR_FIFO,
948 .max_wm = I965_CURSOR_MAX_WM,
949 .default_wm = I965_CURSOR_DFT_WM,
951 .cacheline_size = G4X_FIFO_LINE_SIZE,
953 static const struct intel_watermark_params valleyview_wm_info = {
954 .fifo_size = VALLEYVIEW_FIFO_SIZE,
955 .max_wm = VALLEYVIEW_MAX_WM,
956 .default_wm = VALLEYVIEW_MAX_WM,
958 .cacheline_size = G4X_FIFO_LINE_SIZE,
960 static const struct intel_watermark_params valleyview_cursor_wm_info = {
961 .fifo_size = I965_CURSOR_FIFO,
962 .max_wm = VALLEYVIEW_CURSOR_MAX_WM,
963 .default_wm = I965_CURSOR_DFT_WM,
965 .cacheline_size = G4X_FIFO_LINE_SIZE,
967 static const struct intel_watermark_params i965_cursor_wm_info = {
968 .fifo_size = I965_CURSOR_FIFO,
969 .max_wm = I965_CURSOR_MAX_WM,
970 .default_wm = I965_CURSOR_DFT_WM,
972 .cacheline_size = I915_FIFO_LINE_SIZE,
974 static const struct intel_watermark_params i945_wm_info = {
975 .fifo_size = I945_FIFO_SIZE,
976 .max_wm = I915_MAX_WM,
979 .cacheline_size = I915_FIFO_LINE_SIZE,
981 static const struct intel_watermark_params i915_wm_info = {
982 .fifo_size = I915_FIFO_SIZE,
983 .max_wm = I915_MAX_WM,
986 .cacheline_size = I915_FIFO_LINE_SIZE,
988 static const struct intel_watermark_params i830_wm_info = {
989 .fifo_size = I855GM_FIFO_SIZE,
990 .max_wm = I915_MAX_WM,
993 .cacheline_size = I830_FIFO_LINE_SIZE,
995 static const struct intel_watermark_params i845_wm_info = {
996 .fifo_size = I830_FIFO_SIZE,
997 .max_wm = I915_MAX_WM,
1000 .cacheline_size = I830_FIFO_LINE_SIZE,
1004 * intel_calculate_wm - calculate watermark level
1005 * @clock_in_khz: pixel clock
1006 * @wm: chip FIFO params
1007 * @pixel_size: display pixel size
1008 * @latency_ns: memory latency for the platform
1010 * Calculate the watermark level (the level at which the display plane will
1011 * start fetching from memory again). Each chip has a different display
1012 * FIFO size and allocation, so the caller needs to figure that out and pass
1013 * in the correct intel_watermark_params structure.
1015 * As the pixel clock runs, the FIFO will be drained at a rate that depends
1016 * on the pixel size. When it reaches the watermark level, it'll start
1017 * fetching FIFO line sized based chunks from memory until the FIFO fills
1018 * past the watermark point. If the FIFO drains completely, a FIFO underrun
1019 * will occur, and a display engine hang could result.
1021 static unsigned long intel_calculate_wm(unsigned long clock_in_khz,
1022 const struct intel_watermark_params *wm,
1025 unsigned long latency_ns)
1027 long entries_required, wm_size;
1030 * Note: we need to make sure we don't overflow for various clock &
1032 * clocks go from a few thousand to several hundred thousand.
1033 * latency is usually a few thousand
1035 entries_required = ((clock_in_khz / 1000) * pixel_size * latency_ns) /
1037 entries_required = DIV_ROUND_UP(entries_required, wm->cacheline_size);
1039 DRM_DEBUG_KMS("FIFO entries required for mode: %ld\n", entries_required);
1041 wm_size = fifo_size - (entries_required + wm->guard_size);
1043 DRM_DEBUG_KMS("FIFO watermark level: %ld\n", wm_size);
1045 /* Don't promote wm_size to unsigned... */
1046 if (wm_size > (long)wm->max_wm)
1047 wm_size = wm->max_wm;
1049 wm_size = wm->default_wm;
1053 static struct drm_crtc *single_enabled_crtc(struct drm_device *dev)
1055 struct drm_crtc *crtc, *enabled = NULL;
1057 for_each_crtc(dev, crtc) {
1058 if (intel_crtc_active(crtc)) {
1068 static void pineview_update_wm(struct drm_crtc *unused_crtc)
1070 struct drm_device *dev = unused_crtc->dev;
1071 struct drm_i915_private *dev_priv = dev->dev_private;
1072 struct drm_crtc *crtc;
1073 const struct cxsr_latency *latency;
1077 latency = intel_get_cxsr_latency(IS_PINEVIEW_G(dev), dev_priv->is_ddr3,
1078 dev_priv->fsb_freq, dev_priv->mem_freq);
1080 DRM_DEBUG_KMS("Unknown FSB/MEM found, disable CxSR\n");
1081 intel_set_memory_cxsr(dev_priv, false);
1085 crtc = single_enabled_crtc(dev);
1087 const struct drm_display_mode *adjusted_mode;
1088 int pixel_size = crtc->primary->fb->bits_per_pixel / 8;
1091 adjusted_mode = &to_intel_crtc(crtc)->config.adjusted_mode;
1092 clock = adjusted_mode->crtc_clock;
1095 wm = intel_calculate_wm(clock, &pineview_display_wm,
1096 pineview_display_wm.fifo_size,
1097 pixel_size, latency->display_sr);
1098 reg = I915_READ(DSPFW1);
1099 reg &= ~DSPFW_SR_MASK;
1100 reg |= wm << DSPFW_SR_SHIFT;
1101 I915_WRITE(DSPFW1, reg);
1102 DRM_DEBUG_KMS("DSPFW1 register is %x\n", reg);
1105 wm = intel_calculate_wm(clock, &pineview_cursor_wm,
1106 pineview_display_wm.fifo_size,
1107 pixel_size, latency->cursor_sr);
1108 reg = I915_READ(DSPFW3);
1109 reg &= ~DSPFW_CURSOR_SR_MASK;
1110 reg |= (wm & 0x3f) << DSPFW_CURSOR_SR_SHIFT;
1111 I915_WRITE(DSPFW3, reg);
1113 /* Display HPLL off SR */
1114 wm = intel_calculate_wm(clock, &pineview_display_hplloff_wm,
1115 pineview_display_hplloff_wm.fifo_size,
1116 pixel_size, latency->display_hpll_disable);
1117 reg = I915_READ(DSPFW3);
1118 reg &= ~DSPFW_HPLL_SR_MASK;
1119 reg |= wm & DSPFW_HPLL_SR_MASK;
1120 I915_WRITE(DSPFW3, reg);
1122 /* cursor HPLL off SR */
1123 wm = intel_calculate_wm(clock, &pineview_cursor_hplloff_wm,
1124 pineview_display_hplloff_wm.fifo_size,
1125 pixel_size, latency->cursor_hpll_disable);
1126 reg = I915_READ(DSPFW3);
1127 reg &= ~DSPFW_HPLL_CURSOR_MASK;
1128 reg |= (wm & 0x3f) << DSPFW_HPLL_CURSOR_SHIFT;
1129 I915_WRITE(DSPFW3, reg);
1130 DRM_DEBUG_KMS("DSPFW3 register is %x\n", reg);
1132 intel_set_memory_cxsr(dev_priv, true);
1134 intel_set_memory_cxsr(dev_priv, false);
1138 static bool g4x_compute_wm0(struct drm_device *dev,
1140 const struct intel_watermark_params *display,
1141 int display_latency_ns,
1142 const struct intel_watermark_params *cursor,
1143 int cursor_latency_ns,
1147 struct drm_crtc *crtc;
1148 const struct drm_display_mode *adjusted_mode;
1149 int htotal, hdisplay, clock, pixel_size;
1150 int line_time_us, line_count;
1151 int entries, tlb_miss;
1153 crtc = intel_get_crtc_for_plane(dev, plane);
1154 if (!intel_crtc_active(crtc)) {
1155 *cursor_wm = cursor->guard_size;
1156 *plane_wm = display->guard_size;
1160 adjusted_mode = &to_intel_crtc(crtc)->config.adjusted_mode;
1161 clock = adjusted_mode->crtc_clock;
1162 htotal = adjusted_mode->crtc_htotal;
1163 hdisplay = to_intel_crtc(crtc)->config.pipe_src_w;
1164 pixel_size = crtc->primary->fb->bits_per_pixel / 8;
1166 /* Use the small buffer method to calculate plane watermark */
1167 entries = ((clock * pixel_size / 1000) * display_latency_ns) / 1000;
1168 tlb_miss = display->fifo_size*display->cacheline_size - hdisplay * 8;
1170 entries += tlb_miss;
1171 entries = DIV_ROUND_UP(entries, display->cacheline_size);
1172 *plane_wm = entries + display->guard_size;
1173 if (*plane_wm > (int)display->max_wm)
1174 *plane_wm = display->max_wm;
1176 /* Use the large buffer method to calculate cursor watermark */
1177 line_time_us = max(htotal * 1000 / clock, 1);
1178 line_count = (cursor_latency_ns / line_time_us + 1000) / 1000;
1179 entries = line_count * to_intel_crtc(crtc)->cursor_width * pixel_size;
1180 tlb_miss = cursor->fifo_size*cursor->cacheline_size - hdisplay * 8;
1182 entries += tlb_miss;
1183 entries = DIV_ROUND_UP(entries, cursor->cacheline_size);
1184 *cursor_wm = entries + cursor->guard_size;
1185 if (*cursor_wm > (int)cursor->max_wm)
1186 *cursor_wm = (int)cursor->max_wm;
1192 * Check the wm result.
1194 * If any calculated watermark values is larger than the maximum value that
1195 * can be programmed into the associated watermark register, that watermark
1198 static bool g4x_check_srwm(struct drm_device *dev,
1199 int display_wm, int cursor_wm,
1200 const struct intel_watermark_params *display,
1201 const struct intel_watermark_params *cursor)
1203 DRM_DEBUG_KMS("SR watermark: display plane %d, cursor %d\n",
1204 display_wm, cursor_wm);
1206 if (display_wm > display->max_wm) {
1207 DRM_DEBUG_KMS("display watermark is too large(%d/%ld), disabling\n",
1208 display_wm, display->max_wm);
1212 if (cursor_wm > cursor->max_wm) {
1213 DRM_DEBUG_KMS("cursor watermark is too large(%d/%ld), disabling\n",
1214 cursor_wm, cursor->max_wm);
1218 if (!(display_wm || cursor_wm)) {
1219 DRM_DEBUG_KMS("SR latency is 0, disabling\n");
1226 static bool g4x_compute_srwm(struct drm_device *dev,
1229 const struct intel_watermark_params *display,
1230 const struct intel_watermark_params *cursor,
1231 int *display_wm, int *cursor_wm)
1233 struct drm_crtc *crtc;
1234 const struct drm_display_mode *adjusted_mode;
1235 int hdisplay, htotal, pixel_size, clock;
1236 unsigned long line_time_us;
1237 int line_count, line_size;
1242 *display_wm = *cursor_wm = 0;
1246 crtc = intel_get_crtc_for_plane(dev, plane);
1247 adjusted_mode = &to_intel_crtc(crtc)->config.adjusted_mode;
1248 clock = adjusted_mode->crtc_clock;
1249 htotal = adjusted_mode->crtc_htotal;
1250 hdisplay = to_intel_crtc(crtc)->config.pipe_src_w;
1251 pixel_size = crtc->primary->fb->bits_per_pixel / 8;
1253 line_time_us = max(htotal * 1000 / clock, 1);
1254 line_count = (latency_ns / line_time_us + 1000) / 1000;
1255 line_size = hdisplay * pixel_size;
1257 /* Use the minimum of the small and large buffer method for primary */
1258 small = ((clock * pixel_size / 1000) * latency_ns) / 1000;
1259 large = line_count * line_size;
1261 entries = DIV_ROUND_UP(min(small, large), display->cacheline_size);
1262 *display_wm = entries + display->guard_size;
1264 /* calculate the self-refresh watermark for display cursor */
1265 entries = line_count * pixel_size * to_intel_crtc(crtc)->cursor_width;
1266 entries = DIV_ROUND_UP(entries, cursor->cacheline_size);
1267 *cursor_wm = entries + cursor->guard_size;
1269 return g4x_check_srwm(dev,
1270 *display_wm, *cursor_wm,
1274 static bool vlv_compute_drain_latency(struct drm_crtc *crtc,
1280 int clock = to_intel_crtc(crtc)->config.adjusted_mode.crtc_clock;
1282 if (WARN(clock == 0, "Pixel clock is zero!\n"))
1285 if (WARN(pixel_size == 0, "Pixel size is zero!\n"))
1288 entries = DIV_ROUND_UP(clock, 1000) * pixel_size;
1289 *prec_mult = (entries > 128) ? DRAIN_LATENCY_PRECISION_64 :
1290 DRAIN_LATENCY_PRECISION_32;
1291 *drain_latency = (64 * (*prec_mult) * 4) / entries;
1293 if (*drain_latency > DRAIN_LATENCY_MASK)
1294 *drain_latency = DRAIN_LATENCY_MASK;
1300 * Update drain latency registers of memory arbiter
1302 * Valleyview SoC has a new memory arbiter and needs drain latency registers
1303 * to be programmed. Each plane has a drain latency multiplier and a drain
1307 static void vlv_update_drain_latency(struct drm_crtc *crtc)
1309 struct drm_i915_private *dev_priv = crtc->dev->dev_private;
1310 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
1313 enum pipe pipe = intel_crtc->pipe;
1314 int plane_prec, prec_mult, plane_dl;
1316 plane_dl = I915_READ(VLV_DDL(pipe)) & ~(DDL_PLANE_PRECISION_64 |
1317 DRAIN_LATENCY_MASK | DDL_CURSOR_PRECISION_64 |
1318 (DRAIN_LATENCY_MASK << DDL_CURSOR_SHIFT));
1320 if (!intel_crtc_active(crtc)) {
1321 I915_WRITE(VLV_DDL(pipe), plane_dl);
1325 /* Primary plane Drain Latency */
1326 pixel_size = crtc->primary->fb->bits_per_pixel / 8; /* BPP */
1327 if (vlv_compute_drain_latency(crtc, pixel_size, &prec_mult, &drain_latency)) {
1328 plane_prec = (prec_mult == DRAIN_LATENCY_PRECISION_64) ?
1329 DDL_PLANE_PRECISION_64 :
1330 DDL_PLANE_PRECISION_32;
1331 plane_dl |= plane_prec | drain_latency;
1334 /* Cursor Drain Latency
1335 * BPP is always 4 for cursor
1339 /* Program cursor DL only if it is enabled */
1340 if (intel_crtc->cursor_base &&
1341 vlv_compute_drain_latency(crtc, pixel_size, &prec_mult, &drain_latency)) {
1342 plane_prec = (prec_mult == DRAIN_LATENCY_PRECISION_64) ?
1343 DDL_CURSOR_PRECISION_64 :
1344 DDL_CURSOR_PRECISION_32;
1345 plane_dl |= plane_prec | (drain_latency << DDL_CURSOR_SHIFT);
1348 I915_WRITE(VLV_DDL(pipe), plane_dl);
1351 #define single_plane_enabled(mask) is_power_of_2(mask)
1353 static void valleyview_update_wm(struct drm_crtc *crtc)
1355 struct drm_device *dev = crtc->dev;
1356 static const int sr_latency_ns = 12000;
1357 struct drm_i915_private *dev_priv = dev->dev_private;
1358 int planea_wm, planeb_wm, cursora_wm, cursorb_wm;
1359 int plane_sr, cursor_sr;
1360 int ignore_plane_sr, ignore_cursor_sr;
1361 unsigned int enabled = 0;
1364 vlv_update_drain_latency(crtc);
1366 if (g4x_compute_wm0(dev, PIPE_A,
1367 &valleyview_wm_info, latency_ns,
1368 &valleyview_cursor_wm_info, latency_ns,
1369 &planea_wm, &cursora_wm))
1370 enabled |= 1 << PIPE_A;
1372 if (g4x_compute_wm0(dev, PIPE_B,
1373 &valleyview_wm_info, latency_ns,
1374 &valleyview_cursor_wm_info, latency_ns,
1375 &planeb_wm, &cursorb_wm))
1376 enabled |= 1 << PIPE_B;
1378 if (single_plane_enabled(enabled) &&
1379 g4x_compute_srwm(dev, ffs(enabled) - 1,
1381 &valleyview_wm_info,
1382 &valleyview_cursor_wm_info,
1383 &plane_sr, &ignore_cursor_sr) &&
1384 g4x_compute_srwm(dev, ffs(enabled) - 1,
1386 &valleyview_wm_info,
1387 &valleyview_cursor_wm_info,
1388 &ignore_plane_sr, &cursor_sr)) {
1389 cxsr_enabled = true;
1391 cxsr_enabled = false;
1392 intel_set_memory_cxsr(dev_priv, false);
1393 plane_sr = cursor_sr = 0;
1396 DRM_DEBUG_KMS("Setting FIFO watermarks - A: plane=%d, cursor=%d, "
1397 "B: plane=%d, cursor=%d, SR: plane=%d, cursor=%d\n",
1398 planea_wm, cursora_wm,
1399 planeb_wm, cursorb_wm,
1400 plane_sr, cursor_sr);
1403 (plane_sr << DSPFW_SR_SHIFT) |
1404 (cursorb_wm << DSPFW_CURSORB_SHIFT) |
1405 (planeb_wm << DSPFW_PLANEB_SHIFT) |
1406 (planea_wm << DSPFW_PLANEA_SHIFT));
1408 (I915_READ(DSPFW2) & ~DSPFW_CURSORA_MASK) |
1409 (cursora_wm << DSPFW_CURSORA_SHIFT));
1411 (I915_READ(DSPFW3) & ~DSPFW_CURSOR_SR_MASK) |
1412 (cursor_sr << DSPFW_CURSOR_SR_SHIFT));
1415 intel_set_memory_cxsr(dev_priv, true);
1418 static void cherryview_update_wm(struct drm_crtc *crtc)
1420 struct drm_device *dev = crtc->dev;
1421 static const int sr_latency_ns = 12000;
1422 struct drm_i915_private *dev_priv = dev->dev_private;
1423 int planea_wm, planeb_wm, planec_wm;
1424 int cursora_wm, cursorb_wm, cursorc_wm;
1425 int plane_sr, cursor_sr;
1426 int ignore_plane_sr, ignore_cursor_sr;
1427 unsigned int enabled = 0;
1430 vlv_update_drain_latency(crtc);
1432 if (g4x_compute_wm0(dev, PIPE_A,
1433 &valleyview_wm_info, latency_ns,
1434 &valleyview_cursor_wm_info, latency_ns,
1435 &planea_wm, &cursora_wm))
1436 enabled |= 1 << PIPE_A;
1438 if (g4x_compute_wm0(dev, PIPE_B,
1439 &valleyview_wm_info, latency_ns,
1440 &valleyview_cursor_wm_info, latency_ns,
1441 &planeb_wm, &cursorb_wm))
1442 enabled |= 1 << PIPE_B;
1444 if (g4x_compute_wm0(dev, PIPE_C,
1445 &valleyview_wm_info, latency_ns,
1446 &valleyview_cursor_wm_info, latency_ns,
1447 &planec_wm, &cursorc_wm))
1448 enabled |= 1 << PIPE_C;
1450 if (single_plane_enabled(enabled) &&
1451 g4x_compute_srwm(dev, ffs(enabled) - 1,
1453 &valleyview_wm_info,
1454 &valleyview_cursor_wm_info,
1455 &plane_sr, &ignore_cursor_sr) &&
1456 g4x_compute_srwm(dev, ffs(enabled) - 1,
1458 &valleyview_wm_info,
1459 &valleyview_cursor_wm_info,
1460 &ignore_plane_sr, &cursor_sr)) {
1461 cxsr_enabled = true;
1463 cxsr_enabled = false;
1464 intel_set_memory_cxsr(dev_priv, false);
1465 plane_sr = cursor_sr = 0;
1468 DRM_DEBUG_KMS("Setting FIFO watermarks - A: plane=%d, cursor=%d, "
1469 "B: plane=%d, cursor=%d, C: plane=%d, cursor=%d, "
1470 "SR: plane=%d, cursor=%d\n",
1471 planea_wm, cursora_wm,
1472 planeb_wm, cursorb_wm,
1473 planec_wm, cursorc_wm,
1474 plane_sr, cursor_sr);
1477 (plane_sr << DSPFW_SR_SHIFT) |
1478 (cursorb_wm << DSPFW_CURSORB_SHIFT) |
1479 (planeb_wm << DSPFW_PLANEB_SHIFT) |
1480 (planea_wm << DSPFW_PLANEA_SHIFT));
1482 (I915_READ(DSPFW2) & ~DSPFW_CURSORA_MASK) |
1483 (cursora_wm << DSPFW_CURSORA_SHIFT));
1485 (I915_READ(DSPFW3) & ~DSPFW_CURSOR_SR_MASK) |
1486 (cursor_sr << DSPFW_CURSOR_SR_SHIFT));
1487 I915_WRITE(DSPFW9_CHV,
1488 (I915_READ(DSPFW9_CHV) & ~(DSPFW_PLANEC_MASK |
1489 DSPFW_CURSORC_MASK)) |
1490 (planec_wm << DSPFW_PLANEC_SHIFT) |
1491 (cursorc_wm << DSPFW_CURSORC_SHIFT));
1494 intel_set_memory_cxsr(dev_priv, true);
1497 static void valleyview_update_sprite_wm(struct drm_plane *plane,
1498 struct drm_crtc *crtc,
1499 uint32_t sprite_width,
1500 uint32_t sprite_height,
1502 bool enabled, bool scaled)
1504 struct drm_device *dev = crtc->dev;
1505 struct drm_i915_private *dev_priv = dev->dev_private;
1506 int pipe = to_intel_plane(plane)->pipe;
1507 int sprite = to_intel_plane(plane)->plane;
1513 sprite_dl = I915_READ(VLV_DDL(pipe)) & ~(DDL_SPRITE_PRECISION_64(sprite) |
1514 (DRAIN_LATENCY_MASK << DDL_SPRITE_SHIFT(sprite)));
1516 if (enabled && vlv_compute_drain_latency(crtc, pixel_size, &prec_mult,
1518 plane_prec = (prec_mult == DRAIN_LATENCY_PRECISION_64) ?
1519 DDL_SPRITE_PRECISION_64(sprite) :
1520 DDL_SPRITE_PRECISION_32(sprite);
1521 sprite_dl |= plane_prec |
1522 (drain_latency << DDL_SPRITE_SHIFT(sprite));
1525 I915_WRITE(VLV_DDL(pipe), sprite_dl);
1528 static void g4x_update_wm(struct drm_crtc *crtc)
1530 struct drm_device *dev = crtc->dev;
1531 static const int sr_latency_ns = 12000;
1532 struct drm_i915_private *dev_priv = dev->dev_private;
1533 int planea_wm, planeb_wm, cursora_wm, cursorb_wm;
1534 int plane_sr, cursor_sr;
1535 unsigned int enabled = 0;
1538 if (g4x_compute_wm0(dev, PIPE_A,
1539 &g4x_wm_info, latency_ns,
1540 &g4x_cursor_wm_info, latency_ns,
1541 &planea_wm, &cursora_wm))
1542 enabled |= 1 << PIPE_A;
1544 if (g4x_compute_wm0(dev, PIPE_B,
1545 &g4x_wm_info, latency_ns,
1546 &g4x_cursor_wm_info, latency_ns,
1547 &planeb_wm, &cursorb_wm))
1548 enabled |= 1 << PIPE_B;
1550 if (single_plane_enabled(enabled) &&
1551 g4x_compute_srwm(dev, ffs(enabled) - 1,
1554 &g4x_cursor_wm_info,
1555 &plane_sr, &cursor_sr)) {
1556 cxsr_enabled = true;
1558 cxsr_enabled = false;
1559 intel_set_memory_cxsr(dev_priv, false);
1560 plane_sr = cursor_sr = 0;
1563 DRM_DEBUG_KMS("Setting FIFO watermarks - A: plane=%d, cursor=%d, "
1564 "B: plane=%d, cursor=%d, SR: plane=%d, cursor=%d\n",
1565 planea_wm, cursora_wm,
1566 planeb_wm, cursorb_wm,
1567 plane_sr, cursor_sr);
1570 (plane_sr << DSPFW_SR_SHIFT) |
1571 (cursorb_wm << DSPFW_CURSORB_SHIFT) |
1572 (planeb_wm << DSPFW_PLANEB_SHIFT) |
1573 (planea_wm << DSPFW_PLANEA_SHIFT));
1575 (I915_READ(DSPFW2) & ~DSPFW_CURSORA_MASK) |
1576 (cursora_wm << DSPFW_CURSORA_SHIFT));
1577 /* HPLL off in SR has some issues on G4x... disable it */
1579 (I915_READ(DSPFW3) & ~(DSPFW_HPLL_SR_EN | DSPFW_CURSOR_SR_MASK)) |
1580 (cursor_sr << DSPFW_CURSOR_SR_SHIFT));
1583 intel_set_memory_cxsr(dev_priv, true);
1586 static void i965_update_wm(struct drm_crtc *unused_crtc)
1588 struct drm_device *dev = unused_crtc->dev;
1589 struct drm_i915_private *dev_priv = dev->dev_private;
1590 struct drm_crtc *crtc;
1595 /* Calc sr entries for one plane configs */
1596 crtc = single_enabled_crtc(dev);
1598 /* self-refresh has much higher latency */
1599 static const int sr_latency_ns = 12000;
1600 const struct drm_display_mode *adjusted_mode =
1601 &to_intel_crtc(crtc)->config.adjusted_mode;
1602 int clock = adjusted_mode->crtc_clock;
1603 int htotal = adjusted_mode->crtc_htotal;
1604 int hdisplay = to_intel_crtc(crtc)->config.pipe_src_w;
1605 int pixel_size = crtc->primary->fb->bits_per_pixel / 8;
1606 unsigned long line_time_us;
1609 line_time_us = max(htotal * 1000 / clock, 1);
1611 /* Use ns/us then divide to preserve precision */
1612 entries = (((sr_latency_ns / line_time_us) + 1000) / 1000) *
1613 pixel_size * hdisplay;
1614 entries = DIV_ROUND_UP(entries, I915_FIFO_LINE_SIZE);
1615 srwm = I965_FIFO_SIZE - entries;
1619 DRM_DEBUG_KMS("self-refresh entries: %d, wm: %d\n",
1622 entries = (((sr_latency_ns / line_time_us) + 1000) / 1000) *
1623 pixel_size * to_intel_crtc(crtc)->cursor_width;
1624 entries = DIV_ROUND_UP(entries,
1625 i965_cursor_wm_info.cacheline_size);
1626 cursor_sr = i965_cursor_wm_info.fifo_size -
1627 (entries + i965_cursor_wm_info.guard_size);
1629 if (cursor_sr > i965_cursor_wm_info.max_wm)
1630 cursor_sr = i965_cursor_wm_info.max_wm;
1632 DRM_DEBUG_KMS("self-refresh watermark: display plane %d "
1633 "cursor %d\n", srwm, cursor_sr);
1635 cxsr_enabled = true;
1637 cxsr_enabled = false;
1638 /* Turn off self refresh if both pipes are enabled */
1639 intel_set_memory_cxsr(dev_priv, false);
1642 DRM_DEBUG_KMS("Setting FIFO watermarks - A: 8, B: 8, C: 8, SR %d\n",
1645 /* 965 has limitations... */
1646 I915_WRITE(DSPFW1, (srwm << DSPFW_SR_SHIFT) |
1647 (8 << DSPFW_CURSORB_SHIFT) |
1648 (8 << DSPFW_PLANEB_SHIFT) |
1649 (8 << DSPFW_PLANEA_SHIFT));
1650 I915_WRITE(DSPFW2, (8 << DSPFW_CURSORA_SHIFT) |
1651 (8 << DSPFW_PLANEC_SHIFT_OLD));
1652 /* update cursor SR watermark */
1653 I915_WRITE(DSPFW3, (cursor_sr << DSPFW_CURSOR_SR_SHIFT));
1656 intel_set_memory_cxsr(dev_priv, true);
1659 static void i9xx_update_wm(struct drm_crtc *unused_crtc)
1661 struct drm_device *dev = unused_crtc->dev;
1662 struct drm_i915_private *dev_priv = dev->dev_private;
1663 const struct intel_watermark_params *wm_info;
1668 int planea_wm, planeb_wm;
1669 struct drm_crtc *crtc, *enabled = NULL;
1672 wm_info = &i945_wm_info;
1673 else if (!IS_GEN2(dev))
1674 wm_info = &i915_wm_info;
1676 wm_info = &i830_wm_info;
1678 fifo_size = dev_priv->display.get_fifo_size(dev, 0);
1679 crtc = intel_get_crtc_for_plane(dev, 0);
1680 if (intel_crtc_active(crtc)) {
1681 const struct drm_display_mode *adjusted_mode;
1682 int cpp = crtc->primary->fb->bits_per_pixel / 8;
1686 adjusted_mode = &to_intel_crtc(crtc)->config.adjusted_mode;
1687 planea_wm = intel_calculate_wm(adjusted_mode->crtc_clock,
1688 wm_info, fifo_size, cpp,
1692 planea_wm = fifo_size - wm_info->guard_size;
1694 fifo_size = dev_priv->display.get_fifo_size(dev, 1);
1695 crtc = intel_get_crtc_for_plane(dev, 1);
1696 if (intel_crtc_active(crtc)) {
1697 const struct drm_display_mode *adjusted_mode;
1698 int cpp = crtc->primary->fb->bits_per_pixel / 8;
1702 adjusted_mode = &to_intel_crtc(crtc)->config.adjusted_mode;
1703 planeb_wm = intel_calculate_wm(adjusted_mode->crtc_clock,
1704 wm_info, fifo_size, cpp,
1706 if (enabled == NULL)
1711 planeb_wm = fifo_size - wm_info->guard_size;
1713 DRM_DEBUG_KMS("FIFO watermarks - A: %d, B: %d\n", planea_wm, planeb_wm);
1715 if (IS_I915GM(dev) && enabled) {
1716 struct drm_i915_gem_object *obj;
1718 obj = intel_fb_obj(enabled->primary->fb);
1720 /* self-refresh seems busted with untiled */
1721 if (obj->tiling_mode == I915_TILING_NONE)
1726 * Overlay gets an aggressive default since video jitter is bad.
1730 /* Play safe and disable self-refresh before adjusting watermarks. */
1731 intel_set_memory_cxsr(dev_priv, false);
1733 /* Calc sr entries for one plane configs */
1734 if (HAS_FW_BLC(dev) && enabled) {
1735 /* self-refresh has much higher latency */
1736 static const int sr_latency_ns = 6000;
1737 const struct drm_display_mode *adjusted_mode =
1738 &to_intel_crtc(enabled)->config.adjusted_mode;
1739 int clock = adjusted_mode->crtc_clock;
1740 int htotal = adjusted_mode->crtc_htotal;
1741 int hdisplay = to_intel_crtc(enabled)->config.pipe_src_w;
1742 int pixel_size = enabled->primary->fb->bits_per_pixel / 8;
1743 unsigned long line_time_us;
1746 line_time_us = max(htotal * 1000 / clock, 1);
1748 /* Use ns/us then divide to preserve precision */
1749 entries = (((sr_latency_ns / line_time_us) + 1000) / 1000) *
1750 pixel_size * hdisplay;
1751 entries = DIV_ROUND_UP(entries, wm_info->cacheline_size);
1752 DRM_DEBUG_KMS("self-refresh entries: %d\n", entries);
1753 srwm = wm_info->fifo_size - entries;
1757 if (IS_I945G(dev) || IS_I945GM(dev))
1758 I915_WRITE(FW_BLC_SELF,
1759 FW_BLC_SELF_FIFO_MASK | (srwm & 0xff));
1760 else if (IS_I915GM(dev))
1761 I915_WRITE(FW_BLC_SELF, srwm & 0x3f);
1764 DRM_DEBUG_KMS("Setting FIFO watermarks - A: %d, B: %d, C: %d, SR %d\n",
1765 planea_wm, planeb_wm, cwm, srwm);
1767 fwater_lo = ((planeb_wm & 0x3f) << 16) | (planea_wm & 0x3f);
1768 fwater_hi = (cwm & 0x1f);
1770 /* Set request length to 8 cachelines per fetch */
1771 fwater_lo = fwater_lo | (1 << 24) | (1 << 8);
1772 fwater_hi = fwater_hi | (1 << 8);
1774 I915_WRITE(FW_BLC, fwater_lo);
1775 I915_WRITE(FW_BLC2, fwater_hi);
1778 intel_set_memory_cxsr(dev_priv, true);
1781 static void i845_update_wm(struct drm_crtc *unused_crtc)
1783 struct drm_device *dev = unused_crtc->dev;
1784 struct drm_i915_private *dev_priv = dev->dev_private;
1785 struct drm_crtc *crtc;
1786 const struct drm_display_mode *adjusted_mode;
1790 crtc = single_enabled_crtc(dev);
1794 adjusted_mode = &to_intel_crtc(crtc)->config.adjusted_mode;
1795 planea_wm = intel_calculate_wm(adjusted_mode->crtc_clock,
1797 dev_priv->display.get_fifo_size(dev, 0),
1799 fwater_lo = I915_READ(FW_BLC) & ~0xfff;
1800 fwater_lo |= (3<<8) | planea_wm;
1802 DRM_DEBUG_KMS("Setting FIFO watermarks - A: %d\n", planea_wm);
1804 I915_WRITE(FW_BLC, fwater_lo);
1807 static uint32_t ilk_pipe_pixel_rate(struct drm_device *dev,
1808 struct drm_crtc *crtc)
1810 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
1811 uint32_t pixel_rate;
1813 pixel_rate = intel_crtc->config.adjusted_mode.crtc_clock;
1815 /* We only use IF-ID interlacing. If we ever use PF-ID we'll need to
1816 * adjust the pixel_rate here. */
1818 if (intel_crtc->config.pch_pfit.enabled) {
1819 uint64_t pipe_w, pipe_h, pfit_w, pfit_h;
1820 uint32_t pfit_size = intel_crtc->config.pch_pfit.size;
1822 pipe_w = intel_crtc->config.pipe_src_w;
1823 pipe_h = intel_crtc->config.pipe_src_h;
1824 pfit_w = (pfit_size >> 16) & 0xFFFF;
1825 pfit_h = pfit_size & 0xFFFF;
1826 if (pipe_w < pfit_w)
1828 if (pipe_h < pfit_h)
1831 pixel_rate = div_u64((uint64_t) pixel_rate * pipe_w * pipe_h,
1838 /* latency must be in 0.1us units. */
1839 static uint32_t ilk_wm_method1(uint32_t pixel_rate, uint8_t bytes_per_pixel,
1844 if (WARN(latency == 0, "Latency value missing\n"))
1847 ret = (uint64_t) pixel_rate * bytes_per_pixel * latency;
1848 ret = DIV_ROUND_UP_ULL(ret, 64 * 10000) + 2;
1853 /* latency must be in 0.1us units. */
1854 static uint32_t ilk_wm_method2(uint32_t pixel_rate, uint32_t pipe_htotal,
1855 uint32_t horiz_pixels, uint8_t bytes_per_pixel,
1860 if (WARN(latency == 0, "Latency value missing\n"))
1863 ret = (latency * pixel_rate) / (pipe_htotal * 10000);
1864 ret = (ret + 1) * horiz_pixels * bytes_per_pixel;
1865 ret = DIV_ROUND_UP(ret, 64) + 2;
1869 static uint32_t ilk_wm_fbc(uint32_t pri_val, uint32_t horiz_pixels,
1870 uint8_t bytes_per_pixel)
1872 return DIV_ROUND_UP(pri_val * 64, horiz_pixels * bytes_per_pixel) + 2;
1875 struct ilk_pipe_wm_parameters {
1877 uint32_t pipe_htotal;
1878 uint32_t pixel_rate;
1879 struct intel_plane_wm_parameters pri;
1880 struct intel_plane_wm_parameters spr;
1881 struct intel_plane_wm_parameters cur;
1884 struct ilk_wm_maximums {
1891 /* used in computing the new watermarks state */
1892 struct intel_wm_config {
1893 unsigned int num_pipes_active;
1894 bool sprites_enabled;
1895 bool sprites_scaled;
1899 * For both WM_PIPE and WM_LP.
1900 * mem_value must be in 0.1us units.
1902 static uint32_t ilk_compute_pri_wm(const struct ilk_pipe_wm_parameters *params,
1906 uint32_t method1, method2;
1908 if (!params->active || !params->pri.enabled)
1911 method1 = ilk_wm_method1(params->pixel_rate,
1912 params->pri.bytes_per_pixel,
1918 method2 = ilk_wm_method2(params->pixel_rate,
1919 params->pipe_htotal,
1920 params->pri.horiz_pixels,
1921 params->pri.bytes_per_pixel,
1924 return min(method1, method2);
1928 * For both WM_PIPE and WM_LP.
1929 * mem_value must be in 0.1us units.
1931 static uint32_t ilk_compute_spr_wm(const struct ilk_pipe_wm_parameters *params,
1934 uint32_t method1, method2;
1936 if (!params->active || !params->spr.enabled)
1939 method1 = ilk_wm_method1(params->pixel_rate,
1940 params->spr.bytes_per_pixel,
1942 method2 = ilk_wm_method2(params->pixel_rate,
1943 params->pipe_htotal,
1944 params->spr.horiz_pixels,
1945 params->spr.bytes_per_pixel,
1947 return min(method1, method2);
1951 * For both WM_PIPE and WM_LP.
1952 * mem_value must be in 0.1us units.
1954 static uint32_t ilk_compute_cur_wm(const struct ilk_pipe_wm_parameters *params,
1957 if (!params->active || !params->cur.enabled)
1960 return ilk_wm_method2(params->pixel_rate,
1961 params->pipe_htotal,
1962 params->cur.horiz_pixels,
1963 params->cur.bytes_per_pixel,
1967 /* Only for WM_LP. */
1968 static uint32_t ilk_compute_fbc_wm(const struct ilk_pipe_wm_parameters *params,
1971 if (!params->active || !params->pri.enabled)
1974 return ilk_wm_fbc(pri_val,
1975 params->pri.horiz_pixels,
1976 params->pri.bytes_per_pixel);
1979 static unsigned int ilk_display_fifo_size(const struct drm_device *dev)
1981 if (INTEL_INFO(dev)->gen >= 8)
1983 else if (INTEL_INFO(dev)->gen >= 7)
1989 static unsigned int ilk_plane_wm_reg_max(const struct drm_device *dev,
1990 int level, bool is_sprite)
1992 if (INTEL_INFO(dev)->gen >= 8)
1993 /* BDW primary/sprite plane watermarks */
1994 return level == 0 ? 255 : 2047;
1995 else if (INTEL_INFO(dev)->gen >= 7)
1996 /* IVB/HSW primary/sprite plane watermarks */
1997 return level == 0 ? 127 : 1023;
1998 else if (!is_sprite)
1999 /* ILK/SNB primary plane watermarks */
2000 return level == 0 ? 127 : 511;
2002 /* ILK/SNB sprite plane watermarks */
2003 return level == 0 ? 63 : 255;
2006 static unsigned int ilk_cursor_wm_reg_max(const struct drm_device *dev,
2009 if (INTEL_INFO(dev)->gen >= 7)
2010 return level == 0 ? 63 : 255;
2012 return level == 0 ? 31 : 63;
2015 static unsigned int ilk_fbc_wm_reg_max(const struct drm_device *dev)
2017 if (INTEL_INFO(dev)->gen >= 8)
2023 /* Calculate the maximum primary/sprite plane watermark */
2024 static unsigned int ilk_plane_wm_max(const struct drm_device *dev,
2026 const struct intel_wm_config *config,
2027 enum intel_ddb_partitioning ddb_partitioning,
2030 unsigned int fifo_size = ilk_display_fifo_size(dev);
2032 /* if sprites aren't enabled, sprites get nothing */
2033 if (is_sprite && !config->sprites_enabled)
2036 /* HSW allows LP1+ watermarks even with multiple pipes */
2037 if (level == 0 || config->num_pipes_active > 1) {
2038 fifo_size /= INTEL_INFO(dev)->num_pipes;
2041 * For some reason the non self refresh
2042 * FIFO size is only half of the self
2043 * refresh FIFO size on ILK/SNB.
2045 if (INTEL_INFO(dev)->gen <= 6)
2049 if (config->sprites_enabled) {
2050 /* level 0 is always calculated with 1:1 split */
2051 if (level > 0 && ddb_partitioning == INTEL_DDB_PART_5_6) {
2060 /* clamp to max that the registers can hold */
2061 return min(fifo_size, ilk_plane_wm_reg_max(dev, level, is_sprite));
2064 /* Calculate the maximum cursor plane watermark */
2065 static unsigned int ilk_cursor_wm_max(const struct drm_device *dev,
2067 const struct intel_wm_config *config)
2069 /* HSW LP1+ watermarks w/ multiple pipes */
2070 if (level > 0 && config->num_pipes_active > 1)
2073 /* otherwise just report max that registers can hold */
2074 return ilk_cursor_wm_reg_max(dev, level);
2077 static void ilk_compute_wm_maximums(const struct drm_device *dev,
2079 const struct intel_wm_config *config,
2080 enum intel_ddb_partitioning ddb_partitioning,
2081 struct ilk_wm_maximums *max)
2083 max->pri = ilk_plane_wm_max(dev, level, config, ddb_partitioning, false);
2084 max->spr = ilk_plane_wm_max(dev, level, config, ddb_partitioning, true);
2085 max->cur = ilk_cursor_wm_max(dev, level, config);
2086 max->fbc = ilk_fbc_wm_reg_max(dev);
2089 static void ilk_compute_wm_reg_maximums(struct drm_device *dev,
2091 struct ilk_wm_maximums *max)
2093 max->pri = ilk_plane_wm_reg_max(dev, level, false);
2094 max->spr = ilk_plane_wm_reg_max(dev, level, true);
2095 max->cur = ilk_cursor_wm_reg_max(dev, level);
2096 max->fbc = ilk_fbc_wm_reg_max(dev);
2099 static bool ilk_validate_wm_level(int level,
2100 const struct ilk_wm_maximums *max,
2101 struct intel_wm_level *result)
2105 /* already determined to be invalid? */
2106 if (!result->enable)
2109 result->enable = result->pri_val <= max->pri &&
2110 result->spr_val <= max->spr &&
2111 result->cur_val <= max->cur;
2113 ret = result->enable;
2116 * HACK until we can pre-compute everything,
2117 * and thus fail gracefully if LP0 watermarks
2120 if (level == 0 && !result->enable) {
2121 if (result->pri_val > max->pri)
2122 DRM_DEBUG_KMS("Primary WM%d too large %u (max %u)\n",
2123 level, result->pri_val, max->pri);
2124 if (result->spr_val > max->spr)
2125 DRM_DEBUG_KMS("Sprite WM%d too large %u (max %u)\n",
2126 level, result->spr_val, max->spr);
2127 if (result->cur_val > max->cur)
2128 DRM_DEBUG_KMS("Cursor WM%d too large %u (max %u)\n",
2129 level, result->cur_val, max->cur);
2131 result->pri_val = min_t(uint32_t, result->pri_val, max->pri);
2132 result->spr_val = min_t(uint32_t, result->spr_val, max->spr);
2133 result->cur_val = min_t(uint32_t, result->cur_val, max->cur);
2134 result->enable = true;
2140 static void ilk_compute_wm_level(const struct drm_i915_private *dev_priv,
2142 const struct ilk_pipe_wm_parameters *p,
2143 struct intel_wm_level *result)
2145 uint16_t pri_latency = dev_priv->wm.pri_latency[level];
2146 uint16_t spr_latency = dev_priv->wm.spr_latency[level];
2147 uint16_t cur_latency = dev_priv->wm.cur_latency[level];
2149 /* WM1+ latency values stored in 0.5us units */
2156 result->pri_val = ilk_compute_pri_wm(p, pri_latency, level);
2157 result->spr_val = ilk_compute_spr_wm(p, spr_latency);
2158 result->cur_val = ilk_compute_cur_wm(p, cur_latency);
2159 result->fbc_val = ilk_compute_fbc_wm(p, result->pri_val);
2160 result->enable = true;
2164 hsw_compute_linetime_wm(struct drm_device *dev, struct drm_crtc *crtc)
2166 struct drm_i915_private *dev_priv = dev->dev_private;
2167 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
2168 struct drm_display_mode *mode = &intel_crtc->config.adjusted_mode;
2169 u32 linetime, ips_linetime;
2171 if (!intel_crtc_active(crtc))
2174 /* The WM are computed with base on how long it takes to fill a single
2175 * row at the given clock rate, multiplied by 8.
2177 linetime = DIV_ROUND_CLOSEST(mode->crtc_htotal * 1000 * 8,
2179 ips_linetime = DIV_ROUND_CLOSEST(mode->crtc_htotal * 1000 * 8,
2180 intel_ddi_get_cdclk_freq(dev_priv));
2182 return PIPE_WM_LINETIME_IPS_LINETIME(ips_linetime) |
2183 PIPE_WM_LINETIME_TIME(linetime);
2186 static void intel_read_wm_latency(struct drm_device *dev, uint16_t wm[5])
2188 struct drm_i915_private *dev_priv = dev->dev_private;
2190 if (IS_HASWELL(dev) || IS_BROADWELL(dev)) {
2191 uint64_t sskpd = I915_READ64(MCH_SSKPD);
2193 wm[0] = (sskpd >> 56) & 0xFF;
2195 wm[0] = sskpd & 0xF;
2196 wm[1] = (sskpd >> 4) & 0xFF;
2197 wm[2] = (sskpd >> 12) & 0xFF;
2198 wm[3] = (sskpd >> 20) & 0x1FF;
2199 wm[4] = (sskpd >> 32) & 0x1FF;
2200 } else if (INTEL_INFO(dev)->gen >= 6) {
2201 uint32_t sskpd = I915_READ(MCH_SSKPD);
2203 wm[0] = (sskpd >> SSKPD_WM0_SHIFT) & SSKPD_WM_MASK;
2204 wm[1] = (sskpd >> SSKPD_WM1_SHIFT) & SSKPD_WM_MASK;
2205 wm[2] = (sskpd >> SSKPD_WM2_SHIFT) & SSKPD_WM_MASK;
2206 wm[3] = (sskpd >> SSKPD_WM3_SHIFT) & SSKPD_WM_MASK;
2207 } else if (INTEL_INFO(dev)->gen >= 5) {
2208 uint32_t mltr = I915_READ(MLTR_ILK);
2210 /* ILK primary LP0 latency is 700 ns */
2212 wm[1] = (mltr >> MLTR_WM1_SHIFT) & ILK_SRLT_MASK;
2213 wm[2] = (mltr >> MLTR_WM2_SHIFT) & ILK_SRLT_MASK;
2217 static void intel_fixup_spr_wm_latency(struct drm_device *dev, uint16_t wm[5])
2219 /* ILK sprite LP0 latency is 1300 ns */
2220 if (INTEL_INFO(dev)->gen == 5)
2224 static void intel_fixup_cur_wm_latency(struct drm_device *dev, uint16_t wm[5])
2226 /* ILK cursor LP0 latency is 1300 ns */
2227 if (INTEL_INFO(dev)->gen == 5)
2230 /* WaDoubleCursorLP3Latency:ivb */
2231 if (IS_IVYBRIDGE(dev))
2235 int ilk_wm_max_level(const struct drm_device *dev)
2237 /* how many WM levels are we expecting */
2238 if (IS_HASWELL(dev) || IS_BROADWELL(dev))
2240 else if (INTEL_INFO(dev)->gen >= 6)
2246 static void intel_print_wm_latency(struct drm_device *dev,
2248 const uint16_t wm[5])
2250 int level, max_level = ilk_wm_max_level(dev);
2252 for (level = 0; level <= max_level; level++) {
2253 unsigned int latency = wm[level];
2256 DRM_ERROR("%s WM%d latency not provided\n",
2261 /* WM1+ latency values in 0.5us units */
2265 DRM_DEBUG_KMS("%s WM%d latency %u (%u.%u usec)\n",
2266 name, level, wm[level],
2267 latency / 10, latency % 10);
2271 static bool ilk_increase_wm_latency(struct drm_i915_private *dev_priv,
2272 uint16_t wm[5], uint16_t min)
2274 int level, max_level = ilk_wm_max_level(dev_priv->dev);
2279 wm[0] = max(wm[0], min);
2280 for (level = 1; level <= max_level; level++)
2281 wm[level] = max_t(uint16_t, wm[level], DIV_ROUND_UP(min, 5));
2286 static void snb_wm_latency_quirk(struct drm_device *dev)
2288 struct drm_i915_private *dev_priv = dev->dev_private;
2292 * The BIOS provided WM memory latency values are often
2293 * inadequate for high resolution displays. Adjust them.
2295 changed = ilk_increase_wm_latency(dev_priv, dev_priv->wm.pri_latency, 12) |
2296 ilk_increase_wm_latency(dev_priv, dev_priv->wm.spr_latency, 12) |
2297 ilk_increase_wm_latency(dev_priv, dev_priv->wm.cur_latency, 12);
2302 DRM_DEBUG_KMS("WM latency values increased to avoid potential underruns\n");
2303 intel_print_wm_latency(dev, "Primary", dev_priv->wm.pri_latency);
2304 intel_print_wm_latency(dev, "Sprite", dev_priv->wm.spr_latency);
2305 intel_print_wm_latency(dev, "Cursor", dev_priv->wm.cur_latency);
2308 static void ilk_setup_wm_latency(struct drm_device *dev)
2310 struct drm_i915_private *dev_priv = dev->dev_private;
2312 intel_read_wm_latency(dev, dev_priv->wm.pri_latency);
2314 memcpy(dev_priv->wm.spr_latency, dev_priv->wm.pri_latency,
2315 sizeof(dev_priv->wm.pri_latency));
2316 memcpy(dev_priv->wm.cur_latency, dev_priv->wm.pri_latency,
2317 sizeof(dev_priv->wm.pri_latency));
2319 intel_fixup_spr_wm_latency(dev, dev_priv->wm.spr_latency);
2320 intel_fixup_cur_wm_latency(dev, dev_priv->wm.cur_latency);
2322 intel_print_wm_latency(dev, "Primary", dev_priv->wm.pri_latency);
2323 intel_print_wm_latency(dev, "Sprite", dev_priv->wm.spr_latency);
2324 intel_print_wm_latency(dev, "Cursor", dev_priv->wm.cur_latency);
2327 snb_wm_latency_quirk(dev);
2330 static void ilk_compute_wm_parameters(struct drm_crtc *crtc,
2331 struct ilk_pipe_wm_parameters *p)
2333 struct drm_device *dev = crtc->dev;
2334 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
2335 enum pipe pipe = intel_crtc->pipe;
2336 struct drm_plane *plane;
2338 if (!intel_crtc_active(crtc))
2342 p->pipe_htotal = intel_crtc->config.adjusted_mode.crtc_htotal;
2343 p->pixel_rate = ilk_pipe_pixel_rate(dev, crtc);
2344 p->pri.bytes_per_pixel = crtc->primary->fb->bits_per_pixel / 8;
2345 p->cur.bytes_per_pixel = 4;
2346 p->pri.horiz_pixels = intel_crtc->config.pipe_src_w;
2347 p->cur.horiz_pixels = intel_crtc->cursor_width;
2348 /* TODO: for now, assume primary and cursor planes are always enabled. */
2349 p->pri.enabled = true;
2350 p->cur.enabled = true;
2352 drm_for_each_legacy_plane(plane, &dev->mode_config.plane_list) {
2353 struct intel_plane *intel_plane = to_intel_plane(plane);
2355 if (intel_plane->pipe == pipe) {
2356 p->spr = intel_plane->wm;
2362 static void ilk_compute_wm_config(struct drm_device *dev,
2363 struct intel_wm_config *config)
2365 struct intel_crtc *intel_crtc;
2367 /* Compute the currently _active_ config */
2368 for_each_intel_crtc(dev, intel_crtc) {
2369 const struct intel_pipe_wm *wm = &intel_crtc->wm.active;
2371 if (!wm->pipe_enabled)
2374 config->sprites_enabled |= wm->sprites_enabled;
2375 config->sprites_scaled |= wm->sprites_scaled;
2376 config->num_pipes_active++;
2380 /* Compute new watermarks for the pipe */
2381 static bool intel_compute_pipe_wm(struct drm_crtc *crtc,
2382 const struct ilk_pipe_wm_parameters *params,
2383 struct intel_pipe_wm *pipe_wm)
2385 struct drm_device *dev = crtc->dev;
2386 const struct drm_i915_private *dev_priv = dev->dev_private;
2387 int level, max_level = ilk_wm_max_level(dev);
2388 /* LP0 watermark maximums depend on this pipe alone */
2389 struct intel_wm_config config = {
2390 .num_pipes_active = 1,
2391 .sprites_enabled = params->spr.enabled,
2392 .sprites_scaled = params->spr.scaled,
2394 struct ilk_wm_maximums max;
2396 pipe_wm->pipe_enabled = params->active;
2397 pipe_wm->sprites_enabled = params->spr.enabled;
2398 pipe_wm->sprites_scaled = params->spr.scaled;
2400 /* ILK/SNB: LP2+ watermarks only w/o sprites */
2401 if (INTEL_INFO(dev)->gen <= 6 && params->spr.enabled)
2404 /* ILK/SNB/IVB: LP1+ watermarks only w/o scaling */
2405 if (params->spr.scaled)
2408 ilk_compute_wm_level(dev_priv, 0, params, &pipe_wm->wm[0]);
2410 if (IS_HASWELL(dev) || IS_BROADWELL(dev))
2411 pipe_wm->linetime = hsw_compute_linetime_wm(dev, crtc);
2413 /* LP0 watermarks always use 1/2 DDB partitioning */
2414 ilk_compute_wm_maximums(dev, 0, &config, INTEL_DDB_PART_1_2, &max);
2416 /* At least LP0 must be valid */
2417 if (!ilk_validate_wm_level(0, &max, &pipe_wm->wm[0]))
2420 ilk_compute_wm_reg_maximums(dev, 1, &max);
2422 for (level = 1; level <= max_level; level++) {
2423 struct intel_wm_level wm = {};
2425 ilk_compute_wm_level(dev_priv, level, params, &wm);
2428 * Disable any watermark level that exceeds the
2429 * register maximums since such watermarks are
2432 if (!ilk_validate_wm_level(level, &max, &wm))
2435 pipe_wm->wm[level] = wm;
2442 * Merge the watermarks from all active pipes for a specific level.
2444 static void ilk_merge_wm_level(struct drm_device *dev,
2446 struct intel_wm_level *ret_wm)
2448 const struct intel_crtc *intel_crtc;
2450 ret_wm->enable = true;
2452 for_each_intel_crtc(dev, intel_crtc) {
2453 const struct intel_pipe_wm *active = &intel_crtc->wm.active;
2454 const struct intel_wm_level *wm = &active->wm[level];
2456 if (!active->pipe_enabled)
2460 * The watermark values may have been used in the past,
2461 * so we must maintain them in the registers for some
2462 * time even if the level is now disabled.
2465 ret_wm->enable = false;
2467 ret_wm->pri_val = max(ret_wm->pri_val, wm->pri_val);
2468 ret_wm->spr_val = max(ret_wm->spr_val, wm->spr_val);
2469 ret_wm->cur_val = max(ret_wm->cur_val, wm->cur_val);
2470 ret_wm->fbc_val = max(ret_wm->fbc_val, wm->fbc_val);
2475 * Merge all low power watermarks for all active pipes.
2477 static void ilk_wm_merge(struct drm_device *dev,
2478 const struct intel_wm_config *config,
2479 const struct ilk_wm_maximums *max,
2480 struct intel_pipe_wm *merged)
2482 int level, max_level = ilk_wm_max_level(dev);
2483 int last_enabled_level = max_level;
2485 /* ILK/SNB/IVB: LP1+ watermarks only w/ single pipe */
2486 if ((INTEL_INFO(dev)->gen <= 6 || IS_IVYBRIDGE(dev)) &&
2487 config->num_pipes_active > 1)
2490 /* ILK: FBC WM must be disabled always */
2491 merged->fbc_wm_enabled = INTEL_INFO(dev)->gen >= 6;
2493 /* merge each WM1+ level */
2494 for (level = 1; level <= max_level; level++) {
2495 struct intel_wm_level *wm = &merged->wm[level];
2497 ilk_merge_wm_level(dev, level, wm);
2499 if (level > last_enabled_level)
2501 else if (!ilk_validate_wm_level(level, max, wm))
2502 /* make sure all following levels get disabled */
2503 last_enabled_level = level - 1;
2506 * The spec says it is preferred to disable
2507 * FBC WMs instead of disabling a WM level.
2509 if (wm->fbc_val > max->fbc) {
2511 merged->fbc_wm_enabled = false;
2516 /* ILK: LP2+ must be disabled when FBC WM is disabled but FBC enabled */
2518 * FIXME this is racy. FBC might get enabled later.
2519 * What we should check here is whether FBC can be
2520 * enabled sometime later.
2522 if (IS_GEN5(dev) && !merged->fbc_wm_enabled && intel_fbc_enabled(dev)) {
2523 for (level = 2; level <= max_level; level++) {
2524 struct intel_wm_level *wm = &merged->wm[level];
2531 static int ilk_wm_lp_to_level(int wm_lp, const struct intel_pipe_wm *pipe_wm)
2533 /* LP1,LP2,LP3 levels are either 1,2,3 or 1,3,4 */
2534 return wm_lp + (wm_lp >= 2 && pipe_wm->wm[4].enable);
2537 /* The value we need to program into the WM_LPx latency field */
2538 static unsigned int ilk_wm_lp_latency(struct drm_device *dev, int level)
2540 struct drm_i915_private *dev_priv = dev->dev_private;
2542 if (IS_HASWELL(dev) || IS_BROADWELL(dev))
2545 return dev_priv->wm.pri_latency[level];
2548 static void ilk_compute_wm_results(struct drm_device *dev,
2549 const struct intel_pipe_wm *merged,
2550 enum intel_ddb_partitioning partitioning,
2551 struct ilk_wm_values *results)
2553 struct intel_crtc *intel_crtc;
2556 results->enable_fbc_wm = merged->fbc_wm_enabled;
2557 results->partitioning = partitioning;
2559 /* LP1+ register values */
2560 for (wm_lp = 1; wm_lp <= 3; wm_lp++) {
2561 const struct intel_wm_level *r;
2563 level = ilk_wm_lp_to_level(wm_lp, merged);
2565 r = &merged->wm[level];
2568 * Maintain the watermark values even if the level is
2569 * disabled. Doing otherwise could cause underruns.
2571 results->wm_lp[wm_lp - 1] =
2572 (ilk_wm_lp_latency(dev, level) << WM1_LP_LATENCY_SHIFT) |
2573 (r->pri_val << WM1_LP_SR_SHIFT) |
2577 results->wm_lp[wm_lp - 1] |= WM1_LP_SR_EN;
2579 if (INTEL_INFO(dev)->gen >= 8)
2580 results->wm_lp[wm_lp - 1] |=
2581 r->fbc_val << WM1_LP_FBC_SHIFT_BDW;
2583 results->wm_lp[wm_lp - 1] |=
2584 r->fbc_val << WM1_LP_FBC_SHIFT;
2587 * Always set WM1S_LP_EN when spr_val != 0, even if the
2588 * level is disabled. Doing otherwise could cause underruns.
2590 if (INTEL_INFO(dev)->gen <= 6 && r->spr_val) {
2591 WARN_ON(wm_lp != 1);
2592 results->wm_lp_spr[wm_lp - 1] = WM1S_LP_EN | r->spr_val;
2594 results->wm_lp_spr[wm_lp - 1] = r->spr_val;
2597 /* LP0 register values */
2598 for_each_intel_crtc(dev, intel_crtc) {
2599 enum pipe pipe = intel_crtc->pipe;
2600 const struct intel_wm_level *r =
2601 &intel_crtc->wm.active.wm[0];
2603 if (WARN_ON(!r->enable))
2606 results->wm_linetime[pipe] = intel_crtc->wm.active.linetime;
2608 results->wm_pipe[pipe] =
2609 (r->pri_val << WM0_PIPE_PLANE_SHIFT) |
2610 (r->spr_val << WM0_PIPE_SPRITE_SHIFT) |
2615 /* Find the result with the highest level enabled. Check for enable_fbc_wm in
2616 * case both are at the same level. Prefer r1 in case they're the same. */
2617 static struct intel_pipe_wm *ilk_find_best_result(struct drm_device *dev,
2618 struct intel_pipe_wm *r1,
2619 struct intel_pipe_wm *r2)
2621 int level, max_level = ilk_wm_max_level(dev);
2622 int level1 = 0, level2 = 0;
2624 for (level = 1; level <= max_level; level++) {
2625 if (r1->wm[level].enable)
2627 if (r2->wm[level].enable)
2631 if (level1 == level2) {
2632 if (r2->fbc_wm_enabled && !r1->fbc_wm_enabled)
2636 } else if (level1 > level2) {
2643 /* dirty bits used to track which watermarks need changes */
2644 #define WM_DIRTY_PIPE(pipe) (1 << (pipe))
2645 #define WM_DIRTY_LINETIME(pipe) (1 << (8 + (pipe)))
2646 #define WM_DIRTY_LP(wm_lp) (1 << (15 + (wm_lp)))
2647 #define WM_DIRTY_LP_ALL (WM_DIRTY_LP(1) | WM_DIRTY_LP(2) | WM_DIRTY_LP(3))
2648 #define WM_DIRTY_FBC (1 << 24)
2649 #define WM_DIRTY_DDB (1 << 25)
2651 static unsigned int ilk_compute_wm_dirty(struct drm_device *dev,
2652 const struct ilk_wm_values *old,
2653 const struct ilk_wm_values *new)
2655 unsigned int dirty = 0;
2659 for_each_pipe(pipe) {
2660 if (old->wm_linetime[pipe] != new->wm_linetime[pipe]) {
2661 dirty |= WM_DIRTY_LINETIME(pipe);
2662 /* Must disable LP1+ watermarks too */
2663 dirty |= WM_DIRTY_LP_ALL;
2666 if (old->wm_pipe[pipe] != new->wm_pipe[pipe]) {
2667 dirty |= WM_DIRTY_PIPE(pipe);
2668 /* Must disable LP1+ watermarks too */
2669 dirty |= WM_DIRTY_LP_ALL;
2673 if (old->enable_fbc_wm != new->enable_fbc_wm) {
2674 dirty |= WM_DIRTY_FBC;
2675 /* Must disable LP1+ watermarks too */
2676 dirty |= WM_DIRTY_LP_ALL;
2679 if (old->partitioning != new->partitioning) {
2680 dirty |= WM_DIRTY_DDB;
2681 /* Must disable LP1+ watermarks too */
2682 dirty |= WM_DIRTY_LP_ALL;
2685 /* LP1+ watermarks already deemed dirty, no need to continue */
2686 if (dirty & WM_DIRTY_LP_ALL)
2689 /* Find the lowest numbered LP1+ watermark in need of an update... */
2690 for (wm_lp = 1; wm_lp <= 3; wm_lp++) {
2691 if (old->wm_lp[wm_lp - 1] != new->wm_lp[wm_lp - 1] ||
2692 old->wm_lp_spr[wm_lp - 1] != new->wm_lp_spr[wm_lp - 1])
2696 /* ...and mark it and all higher numbered LP1+ watermarks as dirty */
2697 for (; wm_lp <= 3; wm_lp++)
2698 dirty |= WM_DIRTY_LP(wm_lp);
2703 static bool _ilk_disable_lp_wm(struct drm_i915_private *dev_priv,
2706 struct ilk_wm_values *previous = &dev_priv->wm.hw;
2707 bool changed = false;
2709 if (dirty & WM_DIRTY_LP(3) && previous->wm_lp[2] & WM1_LP_SR_EN) {
2710 previous->wm_lp[2] &= ~WM1_LP_SR_EN;
2711 I915_WRITE(WM3_LP_ILK, previous->wm_lp[2]);
2714 if (dirty & WM_DIRTY_LP(2) && previous->wm_lp[1] & WM1_LP_SR_EN) {
2715 previous->wm_lp[1] &= ~WM1_LP_SR_EN;
2716 I915_WRITE(WM2_LP_ILK, previous->wm_lp[1]);
2719 if (dirty & WM_DIRTY_LP(1) && previous->wm_lp[0] & WM1_LP_SR_EN) {
2720 previous->wm_lp[0] &= ~WM1_LP_SR_EN;
2721 I915_WRITE(WM1_LP_ILK, previous->wm_lp[0]);
2726 * Don't touch WM1S_LP_EN here.
2727 * Doing so could cause underruns.
2734 * The spec says we shouldn't write when we don't need, because every write
2735 * causes WMs to be re-evaluated, expending some power.
2737 static void ilk_write_wm_values(struct drm_i915_private *dev_priv,
2738 struct ilk_wm_values *results)
2740 struct drm_device *dev = dev_priv->dev;
2741 struct ilk_wm_values *previous = &dev_priv->wm.hw;
2745 dirty = ilk_compute_wm_dirty(dev, previous, results);
2749 _ilk_disable_lp_wm(dev_priv, dirty);
2751 if (dirty & WM_DIRTY_PIPE(PIPE_A))
2752 I915_WRITE(WM0_PIPEA_ILK, results->wm_pipe[0]);
2753 if (dirty & WM_DIRTY_PIPE(PIPE_B))
2754 I915_WRITE(WM0_PIPEB_ILK, results->wm_pipe[1]);
2755 if (dirty & WM_DIRTY_PIPE(PIPE_C))
2756 I915_WRITE(WM0_PIPEC_IVB, results->wm_pipe[2]);
2758 if (dirty & WM_DIRTY_LINETIME(PIPE_A))
2759 I915_WRITE(PIPE_WM_LINETIME(PIPE_A), results->wm_linetime[0]);
2760 if (dirty & WM_DIRTY_LINETIME(PIPE_B))
2761 I915_WRITE(PIPE_WM_LINETIME(PIPE_B), results->wm_linetime[1]);
2762 if (dirty & WM_DIRTY_LINETIME(PIPE_C))
2763 I915_WRITE(PIPE_WM_LINETIME(PIPE_C), results->wm_linetime[2]);
2765 if (dirty & WM_DIRTY_DDB) {
2766 if (IS_HASWELL(dev) || IS_BROADWELL(dev)) {
2767 val = I915_READ(WM_MISC);
2768 if (results->partitioning == INTEL_DDB_PART_1_2)
2769 val &= ~WM_MISC_DATA_PARTITION_5_6;
2771 val |= WM_MISC_DATA_PARTITION_5_6;
2772 I915_WRITE(WM_MISC, val);
2774 val = I915_READ(DISP_ARB_CTL2);
2775 if (results->partitioning == INTEL_DDB_PART_1_2)
2776 val &= ~DISP_DATA_PARTITION_5_6;
2778 val |= DISP_DATA_PARTITION_5_6;
2779 I915_WRITE(DISP_ARB_CTL2, val);
2783 if (dirty & WM_DIRTY_FBC) {
2784 val = I915_READ(DISP_ARB_CTL);
2785 if (results->enable_fbc_wm)
2786 val &= ~DISP_FBC_WM_DIS;
2788 val |= DISP_FBC_WM_DIS;
2789 I915_WRITE(DISP_ARB_CTL, val);
2792 if (dirty & WM_DIRTY_LP(1) &&
2793 previous->wm_lp_spr[0] != results->wm_lp_spr[0])
2794 I915_WRITE(WM1S_LP_ILK, results->wm_lp_spr[0]);
2796 if (INTEL_INFO(dev)->gen >= 7) {
2797 if (dirty & WM_DIRTY_LP(2) && previous->wm_lp_spr[1] != results->wm_lp_spr[1])
2798 I915_WRITE(WM2S_LP_IVB, results->wm_lp_spr[1]);
2799 if (dirty & WM_DIRTY_LP(3) && previous->wm_lp_spr[2] != results->wm_lp_spr[2])
2800 I915_WRITE(WM3S_LP_IVB, results->wm_lp_spr[2]);
2803 if (dirty & WM_DIRTY_LP(1) && previous->wm_lp[0] != results->wm_lp[0])
2804 I915_WRITE(WM1_LP_ILK, results->wm_lp[0]);
2805 if (dirty & WM_DIRTY_LP(2) && previous->wm_lp[1] != results->wm_lp[1])
2806 I915_WRITE(WM2_LP_ILK, results->wm_lp[1]);
2807 if (dirty & WM_DIRTY_LP(3) && previous->wm_lp[2] != results->wm_lp[2])
2808 I915_WRITE(WM3_LP_ILK, results->wm_lp[2]);
2810 dev_priv->wm.hw = *results;
2813 static bool ilk_disable_lp_wm(struct drm_device *dev)
2815 struct drm_i915_private *dev_priv = dev->dev_private;
2817 return _ilk_disable_lp_wm(dev_priv, WM_DIRTY_LP_ALL);
2820 static void ilk_update_wm(struct drm_crtc *crtc)
2822 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
2823 struct drm_device *dev = crtc->dev;
2824 struct drm_i915_private *dev_priv = dev->dev_private;
2825 struct ilk_wm_maximums max;
2826 struct ilk_pipe_wm_parameters params = {};
2827 struct ilk_wm_values results = {};
2828 enum intel_ddb_partitioning partitioning;
2829 struct intel_pipe_wm pipe_wm = {};
2830 struct intel_pipe_wm lp_wm_1_2 = {}, lp_wm_5_6 = {}, *best_lp_wm;
2831 struct intel_wm_config config = {};
2833 ilk_compute_wm_parameters(crtc, ¶ms);
2835 intel_compute_pipe_wm(crtc, ¶ms, &pipe_wm);
2837 if (!memcmp(&intel_crtc->wm.active, &pipe_wm, sizeof(pipe_wm)))
2840 intel_crtc->wm.active = pipe_wm;
2842 ilk_compute_wm_config(dev, &config);
2844 ilk_compute_wm_maximums(dev, 1, &config, INTEL_DDB_PART_1_2, &max);
2845 ilk_wm_merge(dev, &config, &max, &lp_wm_1_2);
2847 /* 5/6 split only in single pipe config on IVB+ */
2848 if (INTEL_INFO(dev)->gen >= 7 &&
2849 config.num_pipes_active == 1 && config.sprites_enabled) {
2850 ilk_compute_wm_maximums(dev, 1, &config, INTEL_DDB_PART_5_6, &max);
2851 ilk_wm_merge(dev, &config, &max, &lp_wm_5_6);
2853 best_lp_wm = ilk_find_best_result(dev, &lp_wm_1_2, &lp_wm_5_6);
2855 best_lp_wm = &lp_wm_1_2;
2858 partitioning = (best_lp_wm == &lp_wm_1_2) ?
2859 INTEL_DDB_PART_1_2 : INTEL_DDB_PART_5_6;
2861 ilk_compute_wm_results(dev, best_lp_wm, partitioning, &results);
2863 ilk_write_wm_values(dev_priv, &results);
2867 ilk_update_sprite_wm(struct drm_plane *plane,
2868 struct drm_crtc *crtc,
2869 uint32_t sprite_width, uint32_t sprite_height,
2870 int pixel_size, bool enabled, bool scaled)
2872 struct drm_device *dev = plane->dev;
2873 struct intel_plane *intel_plane = to_intel_plane(plane);
2875 intel_plane->wm.enabled = enabled;
2876 intel_plane->wm.scaled = scaled;
2877 intel_plane->wm.horiz_pixels = sprite_width;
2878 intel_plane->wm.vert_pixels = sprite_width;
2879 intel_plane->wm.bytes_per_pixel = pixel_size;
2882 * IVB workaround: must disable low power watermarks for at least
2883 * one frame before enabling scaling. LP watermarks can be re-enabled
2884 * when scaling is disabled.
2886 * WaCxSRDisabledForSpriteScaling:ivb
2888 if (IS_IVYBRIDGE(dev) && scaled && ilk_disable_lp_wm(dev))
2889 intel_wait_for_vblank(dev, intel_plane->pipe);
2891 ilk_update_wm(crtc);
2894 static void ilk_pipe_wm_get_hw_state(struct drm_crtc *crtc)
2896 struct drm_device *dev = crtc->dev;
2897 struct drm_i915_private *dev_priv = dev->dev_private;
2898 struct ilk_wm_values *hw = &dev_priv->wm.hw;
2899 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
2900 struct intel_pipe_wm *active = &intel_crtc->wm.active;
2901 enum pipe pipe = intel_crtc->pipe;
2902 static const unsigned int wm0_pipe_reg[] = {
2903 [PIPE_A] = WM0_PIPEA_ILK,
2904 [PIPE_B] = WM0_PIPEB_ILK,
2905 [PIPE_C] = WM0_PIPEC_IVB,
2908 hw->wm_pipe[pipe] = I915_READ(wm0_pipe_reg[pipe]);
2909 if (IS_HASWELL(dev) || IS_BROADWELL(dev))
2910 hw->wm_linetime[pipe] = I915_READ(PIPE_WM_LINETIME(pipe));
2912 active->pipe_enabled = intel_crtc_active(crtc);
2914 if (active->pipe_enabled) {
2915 u32 tmp = hw->wm_pipe[pipe];
2918 * For active pipes LP0 watermark is marked as
2919 * enabled, and LP1+ watermaks as disabled since
2920 * we can't really reverse compute them in case
2921 * multiple pipes are active.
2923 active->wm[0].enable = true;
2924 active->wm[0].pri_val = (tmp & WM0_PIPE_PLANE_MASK) >> WM0_PIPE_PLANE_SHIFT;
2925 active->wm[0].spr_val = (tmp & WM0_PIPE_SPRITE_MASK) >> WM0_PIPE_SPRITE_SHIFT;
2926 active->wm[0].cur_val = tmp & WM0_PIPE_CURSOR_MASK;
2927 active->linetime = hw->wm_linetime[pipe];
2929 int level, max_level = ilk_wm_max_level(dev);
2932 * For inactive pipes, all watermark levels
2933 * should be marked as enabled but zeroed,
2934 * which is what we'd compute them to.
2936 for (level = 0; level <= max_level; level++)
2937 active->wm[level].enable = true;
2941 void ilk_wm_get_hw_state(struct drm_device *dev)
2943 struct drm_i915_private *dev_priv = dev->dev_private;
2944 struct ilk_wm_values *hw = &dev_priv->wm.hw;
2945 struct drm_crtc *crtc;
2947 for_each_crtc(dev, crtc)
2948 ilk_pipe_wm_get_hw_state(crtc);
2950 hw->wm_lp[0] = I915_READ(WM1_LP_ILK);
2951 hw->wm_lp[1] = I915_READ(WM2_LP_ILK);
2952 hw->wm_lp[2] = I915_READ(WM3_LP_ILK);
2954 hw->wm_lp_spr[0] = I915_READ(WM1S_LP_ILK);
2955 if (INTEL_INFO(dev)->gen >= 7) {
2956 hw->wm_lp_spr[1] = I915_READ(WM2S_LP_IVB);
2957 hw->wm_lp_spr[2] = I915_READ(WM3S_LP_IVB);
2960 if (IS_HASWELL(dev) || IS_BROADWELL(dev))
2961 hw->partitioning = (I915_READ(WM_MISC) & WM_MISC_DATA_PARTITION_5_6) ?
2962 INTEL_DDB_PART_5_6 : INTEL_DDB_PART_1_2;
2963 else if (IS_IVYBRIDGE(dev))
2964 hw->partitioning = (I915_READ(DISP_ARB_CTL2) & DISP_DATA_PARTITION_5_6) ?
2965 INTEL_DDB_PART_5_6 : INTEL_DDB_PART_1_2;
2968 !(I915_READ(DISP_ARB_CTL) & DISP_FBC_WM_DIS);
2972 * intel_update_watermarks - update FIFO watermark values based on current modes
2974 * Calculate watermark values for the various WM regs based on current mode
2975 * and plane configuration.
2977 * There are several cases to deal with here:
2978 * - normal (i.e. non-self-refresh)
2979 * - self-refresh (SR) mode
2980 * - lines are large relative to FIFO size (buffer can hold up to 2)
2981 * - lines are small relative to FIFO size (buffer can hold more than 2
2982 * lines), so need to account for TLB latency
2984 * The normal calculation is:
2985 * watermark = dotclock * bytes per pixel * latency
2986 * where latency is platform & configuration dependent (we assume pessimal
2989 * The SR calculation is:
2990 * watermark = (trunc(latency/line time)+1) * surface width *
2993 * line time = htotal / dotclock
2994 * surface width = hdisplay for normal plane and 64 for cursor
2995 * and latency is assumed to be high, as above.
2997 * The final value programmed to the register should always be rounded up,
2998 * and include an extra 2 entries to account for clock crossings.
3000 * We don't use the sprite, so we can ignore that. And on Crestline we have
3001 * to set the non-SR watermarks to 8.
3003 void intel_update_watermarks(struct drm_crtc *crtc)
3005 struct drm_i915_private *dev_priv = crtc->dev->dev_private;
3007 if (dev_priv->display.update_wm)
3008 dev_priv->display.update_wm(crtc);
3011 void intel_update_sprite_watermarks(struct drm_plane *plane,
3012 struct drm_crtc *crtc,
3013 uint32_t sprite_width,
3014 uint32_t sprite_height,
3016 bool enabled, bool scaled)
3018 struct drm_i915_private *dev_priv = plane->dev->dev_private;
3020 if (dev_priv->display.update_sprite_wm)
3021 dev_priv->display.update_sprite_wm(plane, crtc,
3022 sprite_width, sprite_height,
3023 pixel_size, enabled, scaled);
3026 static struct drm_i915_gem_object *
3027 intel_alloc_context_page(struct drm_device *dev)
3029 struct drm_i915_gem_object *ctx;
3032 WARN_ON(!mutex_is_locked(&dev->struct_mutex));
3034 ctx = i915_gem_alloc_object(dev, 4096);
3036 DRM_DEBUG("failed to alloc power context, RC6 disabled\n");
3040 ret = i915_gem_obj_ggtt_pin(ctx, 4096, 0);
3042 DRM_ERROR("failed to pin power context: %d\n", ret);
3046 ret = i915_gem_object_set_to_gtt_domain(ctx, 1);
3048 DRM_ERROR("failed to set-domain on power context: %d\n", ret);
3055 i915_gem_object_ggtt_unpin(ctx);
3057 drm_gem_object_unreference(&ctx->base);
3062 * Lock protecting IPS related data structures
3064 DEFINE_SPINLOCK(mchdev_lock);
3066 /* Global for IPS driver to get at the current i915 device. Protected by
3068 static struct drm_i915_private *i915_mch_dev;
3070 bool ironlake_set_drps(struct drm_device *dev, u8 val)
3072 struct drm_i915_private *dev_priv = dev->dev_private;
3075 assert_spin_locked(&mchdev_lock);
3077 rgvswctl = I915_READ16(MEMSWCTL);
3078 if (rgvswctl & MEMCTL_CMD_STS) {
3079 DRM_DEBUG("gpu busy, RCS change rejected\n");
3080 return false; /* still busy with another command */
3083 rgvswctl = (MEMCTL_CMD_CHFREQ << MEMCTL_CMD_SHIFT) |
3084 (val << MEMCTL_FREQ_SHIFT) | MEMCTL_SFCAVM;
3085 I915_WRITE16(MEMSWCTL, rgvswctl);
3086 POSTING_READ16(MEMSWCTL);
3088 rgvswctl |= MEMCTL_CMD_STS;
3089 I915_WRITE16(MEMSWCTL, rgvswctl);
3094 static void ironlake_enable_drps(struct drm_device *dev)
3096 struct drm_i915_private *dev_priv = dev->dev_private;
3097 u32 rgvmodectl = I915_READ(MEMMODECTL);
3098 u8 fmax, fmin, fstart, vstart;
3100 spin_lock_irq(&mchdev_lock);
3102 /* Enable temp reporting */
3103 I915_WRITE16(PMMISC, I915_READ(PMMISC) | MCPPCE_EN);
3104 I915_WRITE16(TSC1, I915_READ(TSC1) | TSE);
3106 /* 100ms RC evaluation intervals */
3107 I915_WRITE(RCUPEI, 100000);
3108 I915_WRITE(RCDNEI, 100000);
3110 /* Set max/min thresholds to 90ms and 80ms respectively */
3111 I915_WRITE(RCBMAXAVG, 90000);
3112 I915_WRITE(RCBMINAVG, 80000);
3114 I915_WRITE(MEMIHYST, 1);
3116 /* Set up min, max, and cur for interrupt handling */
3117 fmax = (rgvmodectl & MEMMODE_FMAX_MASK) >> MEMMODE_FMAX_SHIFT;
3118 fmin = (rgvmodectl & MEMMODE_FMIN_MASK);
3119 fstart = (rgvmodectl & MEMMODE_FSTART_MASK) >>
3120 MEMMODE_FSTART_SHIFT;
3122 vstart = (I915_READ(PXVFREQ_BASE + (fstart * 4)) & PXVFREQ_PX_MASK) >>
3125 dev_priv->ips.fmax = fmax; /* IPS callback will increase this */
3126 dev_priv->ips.fstart = fstart;
3128 dev_priv->ips.max_delay = fstart;
3129 dev_priv->ips.min_delay = fmin;
3130 dev_priv->ips.cur_delay = fstart;
3132 DRM_DEBUG_DRIVER("fmax: %d, fmin: %d, fstart: %d\n",
3133 fmax, fmin, fstart);
3135 I915_WRITE(MEMINTREN, MEMINT_CX_SUPR_EN | MEMINT_EVAL_CHG_EN);
3138 * Interrupts will be enabled in ironlake_irq_postinstall
3141 I915_WRITE(VIDSTART, vstart);
3142 POSTING_READ(VIDSTART);
3144 rgvmodectl |= MEMMODE_SWMODE_EN;
3145 I915_WRITE(MEMMODECTL, rgvmodectl);
3147 if (wait_for_atomic((I915_READ(MEMSWCTL) & MEMCTL_CMD_STS) == 0, 10))
3148 DRM_ERROR("stuck trying to change perf mode\n");
3151 ironlake_set_drps(dev, fstart);
3153 dev_priv->ips.last_count1 = I915_READ(0x112e4) + I915_READ(0x112e8) +
3155 dev_priv->ips.last_time1 = jiffies_to_msecs(jiffies);
3156 dev_priv->ips.last_count2 = I915_READ(0x112f4);
3157 dev_priv->ips.last_time2 = ktime_get_raw_ns();
3159 spin_unlock_irq(&mchdev_lock);
3162 static void ironlake_disable_drps(struct drm_device *dev)
3164 struct drm_i915_private *dev_priv = dev->dev_private;
3167 spin_lock_irq(&mchdev_lock);
3169 rgvswctl = I915_READ16(MEMSWCTL);
3171 /* Ack interrupts, disable EFC interrupt */
3172 I915_WRITE(MEMINTREN, I915_READ(MEMINTREN) & ~MEMINT_EVAL_CHG_EN);
3173 I915_WRITE(MEMINTRSTS, MEMINT_EVAL_CHG);
3174 I915_WRITE(DEIER, I915_READ(DEIER) & ~DE_PCU_EVENT);
3175 I915_WRITE(DEIIR, DE_PCU_EVENT);
3176 I915_WRITE(DEIMR, I915_READ(DEIMR) | DE_PCU_EVENT);
3178 /* Go back to the starting frequency */
3179 ironlake_set_drps(dev, dev_priv->ips.fstart);
3181 rgvswctl |= MEMCTL_CMD_STS;
3182 I915_WRITE(MEMSWCTL, rgvswctl);
3185 spin_unlock_irq(&mchdev_lock);
3188 /* There's a funny hw issue where the hw returns all 0 when reading from
3189 * GEN6_RP_INTERRUPT_LIMITS. Hence we always need to compute the desired value
3190 * ourselves, instead of doing a rmw cycle (which might result in us clearing
3191 * all limits and the gpu stuck at whatever frequency it is at atm).
3193 static u32 gen6_rps_limits(struct drm_i915_private *dev_priv, u8 val)
3197 /* Only set the down limit when we've reached the lowest level to avoid
3198 * getting more interrupts, otherwise leave this clear. This prevents a
3199 * race in the hw when coming out of rc6: There's a tiny window where
3200 * the hw runs at the minimal clock before selecting the desired
3201 * frequency, if the down threshold expires in that window we will not
3202 * receive a down interrupt. */
3203 limits = dev_priv->rps.max_freq_softlimit << 24;
3204 if (val <= dev_priv->rps.min_freq_softlimit)
3205 limits |= dev_priv->rps.min_freq_softlimit << 16;
3210 static void gen6_set_rps_thresholds(struct drm_i915_private *dev_priv, u8 val)
3214 new_power = dev_priv->rps.power;
3215 switch (dev_priv->rps.power) {
3217 if (val > dev_priv->rps.efficient_freq + 1 && val > dev_priv->rps.cur_freq)
3218 new_power = BETWEEN;
3222 if (val <= dev_priv->rps.efficient_freq && val < dev_priv->rps.cur_freq)
3223 new_power = LOW_POWER;
3224 else if (val >= dev_priv->rps.rp0_freq && val > dev_priv->rps.cur_freq)
3225 new_power = HIGH_POWER;
3229 if (val < (dev_priv->rps.rp1_freq + dev_priv->rps.rp0_freq) >> 1 && val < dev_priv->rps.cur_freq)
3230 new_power = BETWEEN;
3233 /* Max/min bins are special */
3234 if (val == dev_priv->rps.min_freq_softlimit)
3235 new_power = LOW_POWER;
3236 if (val == dev_priv->rps.max_freq_softlimit)
3237 new_power = HIGH_POWER;
3238 if (new_power == dev_priv->rps.power)
3241 /* Note the units here are not exactly 1us, but 1280ns. */
3242 switch (new_power) {
3244 /* Upclock if more than 95% busy over 16ms */
3245 I915_WRITE(GEN6_RP_UP_EI, 12500);
3246 I915_WRITE(GEN6_RP_UP_THRESHOLD, 11800);
3248 /* Downclock if less than 85% busy over 32ms */
3249 I915_WRITE(GEN6_RP_DOWN_EI, 25000);
3250 I915_WRITE(GEN6_RP_DOWN_THRESHOLD, 21250);
3252 I915_WRITE(GEN6_RP_CONTROL,
3253 GEN6_RP_MEDIA_TURBO |
3254 GEN6_RP_MEDIA_HW_NORMAL_MODE |
3255 GEN6_RP_MEDIA_IS_GFX |
3257 GEN6_RP_UP_BUSY_AVG |
3258 GEN6_RP_DOWN_IDLE_AVG);
3262 /* Upclock if more than 90% busy over 13ms */
3263 I915_WRITE(GEN6_RP_UP_EI, 10250);
3264 I915_WRITE(GEN6_RP_UP_THRESHOLD, 9225);
3266 /* Downclock if less than 75% busy over 32ms */
3267 I915_WRITE(GEN6_RP_DOWN_EI, 25000);
3268 I915_WRITE(GEN6_RP_DOWN_THRESHOLD, 18750);
3270 I915_WRITE(GEN6_RP_CONTROL,
3271 GEN6_RP_MEDIA_TURBO |
3272 GEN6_RP_MEDIA_HW_NORMAL_MODE |
3273 GEN6_RP_MEDIA_IS_GFX |
3275 GEN6_RP_UP_BUSY_AVG |
3276 GEN6_RP_DOWN_IDLE_AVG);
3280 /* Upclock if more than 85% busy over 10ms */
3281 I915_WRITE(GEN6_RP_UP_EI, 8000);
3282 I915_WRITE(GEN6_RP_UP_THRESHOLD, 6800);
3284 /* Downclock if less than 60% busy over 32ms */
3285 I915_WRITE(GEN6_RP_DOWN_EI, 25000);
3286 I915_WRITE(GEN6_RP_DOWN_THRESHOLD, 15000);
3288 I915_WRITE(GEN6_RP_CONTROL,
3289 GEN6_RP_MEDIA_TURBO |
3290 GEN6_RP_MEDIA_HW_NORMAL_MODE |
3291 GEN6_RP_MEDIA_IS_GFX |
3293 GEN6_RP_UP_BUSY_AVG |
3294 GEN6_RP_DOWN_IDLE_AVG);
3298 dev_priv->rps.power = new_power;
3299 dev_priv->rps.last_adj = 0;
3302 static u32 gen6_rps_pm_mask(struct drm_i915_private *dev_priv, u8 val)
3306 if (val > dev_priv->rps.min_freq_softlimit)
3307 mask |= GEN6_PM_RP_DOWN_THRESHOLD | GEN6_PM_RP_DOWN_TIMEOUT;
3308 if (val < dev_priv->rps.max_freq_softlimit)
3309 mask |= GEN6_PM_RP_UP_THRESHOLD;
3311 mask |= dev_priv->pm_rps_events & (GEN6_PM_RP_DOWN_EI_EXPIRED | GEN6_PM_RP_UP_EI_EXPIRED);
3312 mask &= dev_priv->pm_rps_events;
3314 /* IVB and SNB hard hangs on looping batchbuffer
3315 * if GEN6_PM_UP_EI_EXPIRED is masked.
3317 if (INTEL_INFO(dev_priv->dev)->gen <= 7 && !IS_HASWELL(dev_priv->dev))
3318 mask |= GEN6_PM_RP_UP_EI_EXPIRED;
3320 if (IS_GEN8(dev_priv->dev))
3321 mask |= GEN8_PMINTR_REDIRECT_TO_NON_DISP;
3326 /* gen6_set_rps is called to update the frequency request, but should also be
3327 * called when the range (min_delay and max_delay) is modified so that we can
3328 * update the GEN6_RP_INTERRUPT_LIMITS register accordingly. */
3329 void gen6_set_rps(struct drm_device *dev, u8 val)
3331 struct drm_i915_private *dev_priv = dev->dev_private;
3333 WARN_ON(!mutex_is_locked(&dev_priv->rps.hw_lock));
3334 WARN_ON(val > dev_priv->rps.max_freq_softlimit);
3335 WARN_ON(val < dev_priv->rps.min_freq_softlimit);
3337 /* min/max delay may still have been modified so be sure to
3338 * write the limits value.
3340 if (val != dev_priv->rps.cur_freq) {
3341 gen6_set_rps_thresholds(dev_priv, val);
3343 if (IS_HASWELL(dev) || IS_BROADWELL(dev))
3344 I915_WRITE(GEN6_RPNSWREQ,
3345 HSW_FREQUENCY(val));
3347 I915_WRITE(GEN6_RPNSWREQ,
3348 GEN6_FREQUENCY(val) |
3350 GEN6_AGGRESSIVE_TURBO);
3353 /* Make sure we continue to get interrupts
3354 * until we hit the minimum or maximum frequencies.
3356 I915_WRITE(GEN6_RP_INTERRUPT_LIMITS, gen6_rps_limits(dev_priv, val));
3357 I915_WRITE(GEN6_PMINTRMSK, gen6_rps_pm_mask(dev_priv, val));
3359 POSTING_READ(GEN6_RPNSWREQ);
3361 dev_priv->rps.cur_freq = val;
3362 trace_intel_gpu_freq_change(val * 50);
3365 /* vlv_set_rps_idle: Set the frequency to Rpn if Gfx clocks are down
3367 * * If Gfx is Idle, then
3368 * 1. Mask Turbo interrupts
3369 * 2. Bring up Gfx clock
3370 * 3. Change the freq to Rpn and wait till P-Unit updates freq
3371 * 4. Clear the Force GFX CLK ON bit so that Gfx can down
3372 * 5. Unmask Turbo interrupts
3374 static void vlv_set_rps_idle(struct drm_i915_private *dev_priv)
3376 struct drm_device *dev = dev_priv->dev;
3378 /* Latest VLV doesn't need to force the gfx clock */
3379 if (dev->pdev->revision >= 0xd) {
3380 valleyview_set_rps(dev_priv->dev, dev_priv->rps.min_freq_softlimit);
3385 * When we are idle. Drop to min voltage state.
3388 if (dev_priv->rps.cur_freq <= dev_priv->rps.min_freq_softlimit)
3391 /* Mask turbo interrupt so that they will not come in between */
3392 I915_WRITE(GEN6_PMINTRMSK, 0xffffffff);
3394 vlv_force_gfx_clock(dev_priv, true);
3396 dev_priv->rps.cur_freq = dev_priv->rps.min_freq_softlimit;
3398 vlv_punit_write(dev_priv, PUNIT_REG_GPU_FREQ_REQ,
3399 dev_priv->rps.min_freq_softlimit);
3401 if (wait_for(((vlv_punit_read(dev_priv, PUNIT_REG_GPU_FREQ_STS))
3402 & GENFREQSTATUS) == 0, 5))
3403 DRM_ERROR("timed out waiting for Punit\n");
3405 vlv_force_gfx_clock(dev_priv, false);
3407 I915_WRITE(GEN6_PMINTRMSK,
3408 gen6_rps_pm_mask(dev_priv, dev_priv->rps.cur_freq));
3411 void gen6_rps_idle(struct drm_i915_private *dev_priv)
3413 struct drm_device *dev = dev_priv->dev;
3415 mutex_lock(&dev_priv->rps.hw_lock);
3416 if (dev_priv->rps.enabled) {
3417 if (IS_CHERRYVIEW(dev))
3418 valleyview_set_rps(dev_priv->dev, dev_priv->rps.min_freq_softlimit);
3419 else if (IS_VALLEYVIEW(dev))
3420 vlv_set_rps_idle(dev_priv);
3422 gen6_set_rps(dev_priv->dev, dev_priv->rps.min_freq_softlimit);
3423 dev_priv->rps.last_adj = 0;
3425 mutex_unlock(&dev_priv->rps.hw_lock);
3428 void gen6_rps_boost(struct drm_i915_private *dev_priv)
3430 struct drm_device *dev = dev_priv->dev;
3432 mutex_lock(&dev_priv->rps.hw_lock);
3433 if (dev_priv->rps.enabled) {
3434 if (IS_VALLEYVIEW(dev))
3435 valleyview_set_rps(dev_priv->dev, dev_priv->rps.max_freq_softlimit);
3437 gen6_set_rps(dev_priv->dev, dev_priv->rps.max_freq_softlimit);
3438 dev_priv->rps.last_adj = 0;
3440 mutex_unlock(&dev_priv->rps.hw_lock);
3443 void valleyview_set_rps(struct drm_device *dev, u8 val)
3445 struct drm_i915_private *dev_priv = dev->dev_private;
3447 WARN_ON(!mutex_is_locked(&dev_priv->rps.hw_lock));
3448 WARN_ON(val > dev_priv->rps.max_freq_softlimit);
3449 WARN_ON(val < dev_priv->rps.min_freq_softlimit);
3451 DRM_DEBUG_DRIVER("GPU freq request from %d MHz (%u) to %d MHz (%u)\n",
3452 vlv_gpu_freq(dev_priv, dev_priv->rps.cur_freq),
3453 dev_priv->rps.cur_freq,
3454 vlv_gpu_freq(dev_priv, val), val);
3456 if (val != dev_priv->rps.cur_freq)
3457 vlv_punit_write(dev_priv, PUNIT_REG_GPU_FREQ_REQ, val);
3459 I915_WRITE(GEN6_PMINTRMSK, gen6_rps_pm_mask(dev_priv, val));
3461 dev_priv->rps.cur_freq = val;
3462 trace_intel_gpu_freq_change(vlv_gpu_freq(dev_priv, val));
3465 static void gen8_disable_rps_interrupts(struct drm_device *dev)
3467 struct drm_i915_private *dev_priv = dev->dev_private;
3469 I915_WRITE(GEN6_PMINTRMSK, ~GEN8_PMINTR_REDIRECT_TO_NON_DISP);
3470 I915_WRITE(GEN8_GT_IER(2), I915_READ(GEN8_GT_IER(2)) &
3471 ~dev_priv->pm_rps_events);
3472 /* Complete PM interrupt masking here doesn't race with the rps work
3473 * item again unmasking PM interrupts because that is using a different
3474 * register (GEN8_GT_IMR(2)) to mask PM interrupts. The only risk is in
3475 * leaving stale bits in GEN8_GT_IIR(2) and GEN8_GT_IMR(2) which
3476 * gen8_enable_rps will clean up. */
3478 spin_lock_irq(&dev_priv->irq_lock);
3479 dev_priv->rps.pm_iir = 0;
3480 spin_unlock_irq(&dev_priv->irq_lock);
3482 I915_WRITE(GEN8_GT_IIR(2), dev_priv->pm_rps_events);
3485 static void gen6_disable_rps_interrupts(struct drm_device *dev)
3487 struct drm_i915_private *dev_priv = dev->dev_private;
3489 I915_WRITE(GEN6_PMINTRMSK, 0xffffffff);
3490 I915_WRITE(GEN6_PMIER, I915_READ(GEN6_PMIER) &
3491 ~dev_priv->pm_rps_events);
3492 /* Complete PM interrupt masking here doesn't race with the rps work
3493 * item again unmasking PM interrupts because that is using a different
3494 * register (PMIMR) to mask PM interrupts. The only risk is in leaving
3495 * stale bits in PMIIR and PMIMR which gen6_enable_rps will clean up. */
3497 spin_lock_irq(&dev_priv->irq_lock);
3498 dev_priv->rps.pm_iir = 0;
3499 spin_unlock_irq(&dev_priv->irq_lock);
3501 I915_WRITE(GEN6_PMIIR, dev_priv->pm_rps_events);
3504 static void gen6_disable_rps(struct drm_device *dev)
3506 struct drm_i915_private *dev_priv = dev->dev_private;
3508 I915_WRITE(GEN6_RC_CONTROL, 0);
3509 I915_WRITE(GEN6_RPNSWREQ, 1 << 31);
3511 if (IS_BROADWELL(dev))
3512 gen8_disable_rps_interrupts(dev);
3514 gen6_disable_rps_interrupts(dev);
3517 static void cherryview_disable_rps(struct drm_device *dev)
3519 struct drm_i915_private *dev_priv = dev->dev_private;
3521 I915_WRITE(GEN6_RC_CONTROL, 0);
3523 gen8_disable_rps_interrupts(dev);
3526 static void valleyview_disable_rps(struct drm_device *dev)
3528 struct drm_i915_private *dev_priv = dev->dev_private;
3530 I915_WRITE(GEN6_RC_CONTROL, 0);
3532 gen6_disable_rps_interrupts(dev);
3535 static void intel_print_rc6_info(struct drm_device *dev, u32 mode)
3537 if (IS_VALLEYVIEW(dev)) {
3538 if (mode & (GEN7_RC_CTL_TO_MODE | GEN6_RC_CTL_EI_MODE(1)))
3539 mode = GEN6_RC_CTL_RC6_ENABLE;
3543 DRM_DEBUG_KMS("Enabling RC6 states: RC6 %s, RC6p %s, RC6pp %s\n",
3544 (mode & GEN6_RC_CTL_RC6_ENABLE) ? "on" : "off",
3545 (mode & GEN6_RC_CTL_RC6p_ENABLE) ? "on" : "off",
3546 (mode & GEN6_RC_CTL_RC6pp_ENABLE) ? "on" : "off");
3549 static int sanitize_rc6_option(const struct drm_device *dev, int enable_rc6)
3551 /* No RC6 before Ironlake */
3552 if (INTEL_INFO(dev)->gen < 5)
3555 /* RC6 is only on Ironlake mobile not on desktop */
3556 if (INTEL_INFO(dev)->gen == 5 && !IS_IRONLAKE_M(dev))
3559 /* Respect the kernel parameter if it is set */
3560 if (enable_rc6 >= 0) {
3563 if (INTEL_INFO(dev)->gen == 6 || IS_IVYBRIDGE(dev))
3564 mask = INTEL_RC6_ENABLE | INTEL_RC6p_ENABLE |
3567 mask = INTEL_RC6_ENABLE;
3569 if ((enable_rc6 & mask) != enable_rc6)
3570 DRM_DEBUG_KMS("Adjusting RC6 mask to %d (requested %d, valid %d)\n",
3571 enable_rc6 & mask, enable_rc6, mask);
3573 return enable_rc6 & mask;
3576 /* Disable RC6 on Ironlake */
3577 if (INTEL_INFO(dev)->gen == 5)
3580 if (IS_IVYBRIDGE(dev))
3581 return (INTEL_RC6_ENABLE | INTEL_RC6p_ENABLE);
3583 return INTEL_RC6_ENABLE;
3586 int intel_enable_rc6(const struct drm_device *dev)
3588 return i915.enable_rc6;
3591 static void gen8_enable_rps_interrupts(struct drm_device *dev)
3593 struct drm_i915_private *dev_priv = dev->dev_private;
3595 spin_lock_irq(&dev_priv->irq_lock);
3596 WARN_ON(dev_priv->rps.pm_iir);
3597 gen8_enable_pm_irq(dev_priv, dev_priv->pm_rps_events);
3598 I915_WRITE(GEN8_GT_IIR(2), dev_priv->pm_rps_events);
3599 spin_unlock_irq(&dev_priv->irq_lock);
3602 static void gen6_enable_rps_interrupts(struct drm_device *dev)
3604 struct drm_i915_private *dev_priv = dev->dev_private;
3606 spin_lock_irq(&dev_priv->irq_lock);
3607 WARN_ON(dev_priv->rps.pm_iir);
3608 gen6_enable_pm_irq(dev_priv, dev_priv->pm_rps_events);
3609 I915_WRITE(GEN6_PMIIR, dev_priv->pm_rps_events);
3610 spin_unlock_irq(&dev_priv->irq_lock);
3613 static void parse_rp_state_cap(struct drm_i915_private *dev_priv, u32 rp_state_cap)
3615 /* All of these values are in units of 50MHz */
3616 dev_priv->rps.cur_freq = 0;
3617 /* static values from HW: RP0 < RPe < RP1 < RPn (min_freq) */
3618 dev_priv->rps.rp1_freq = (rp_state_cap >> 8) & 0xff;
3619 dev_priv->rps.rp0_freq = (rp_state_cap >> 0) & 0xff;
3620 dev_priv->rps.min_freq = (rp_state_cap >> 16) & 0xff;
3621 /* XXX: only BYT has a special efficient freq */
3622 dev_priv->rps.efficient_freq = dev_priv->rps.rp1_freq;
3623 /* hw_max = RP0 until we check for overclocking */
3624 dev_priv->rps.max_freq = dev_priv->rps.rp0_freq;
3626 /* Preserve min/max settings in case of re-init */
3627 if (dev_priv->rps.max_freq_softlimit == 0)
3628 dev_priv->rps.max_freq_softlimit = dev_priv->rps.max_freq;
3630 if (dev_priv->rps.min_freq_softlimit == 0)
3631 dev_priv->rps.min_freq_softlimit = dev_priv->rps.min_freq;
3634 static void gen8_enable_rps(struct drm_device *dev)
3636 struct drm_i915_private *dev_priv = dev->dev_private;
3637 struct intel_engine_cs *ring;
3638 uint32_t rc6_mask = 0, rp_state_cap;
3641 /* 1a: Software RC state - RC0 */
3642 I915_WRITE(GEN6_RC_STATE, 0);
3644 /* 1c & 1d: Get forcewake during program sequence. Although the driver
3645 * hasn't enabled a state yet where we need forcewake, BIOS may have.*/
3646 gen6_gt_force_wake_get(dev_priv, FORCEWAKE_ALL);
3648 /* 2a: Disable RC states. */
3649 I915_WRITE(GEN6_RC_CONTROL, 0);
3651 rp_state_cap = I915_READ(GEN6_RP_STATE_CAP);
3652 parse_rp_state_cap(dev_priv, rp_state_cap);
3654 /* 2b: Program RC6 thresholds.*/
3655 I915_WRITE(GEN6_RC6_WAKE_RATE_LIMIT, 40 << 16);
3656 I915_WRITE(GEN6_RC_EVALUATION_INTERVAL, 125000); /* 12500 * 1280ns */
3657 I915_WRITE(GEN6_RC_IDLE_HYSTERSIS, 25); /* 25 * 1280ns */
3658 for_each_ring(ring, dev_priv, unused)
3659 I915_WRITE(RING_MAX_IDLE(ring->mmio_base), 10);
3660 I915_WRITE(GEN6_RC_SLEEP, 0);
3661 if (IS_BROADWELL(dev))
3662 I915_WRITE(GEN6_RC6_THRESHOLD, 625); /* 800us/1.28 for TO */
3664 I915_WRITE(GEN6_RC6_THRESHOLD, 50000); /* 50/125ms per EI */
3667 if (intel_enable_rc6(dev) & INTEL_RC6_ENABLE)
3668 rc6_mask = GEN6_RC_CTL_RC6_ENABLE;
3669 intel_print_rc6_info(dev, rc6_mask);
3670 if (IS_BROADWELL(dev))
3671 I915_WRITE(GEN6_RC_CONTROL, GEN6_RC_CTL_HW_ENABLE |
3672 GEN7_RC_CTL_TO_MODE |
3675 I915_WRITE(GEN6_RC_CONTROL, GEN6_RC_CTL_HW_ENABLE |
3676 GEN6_RC_CTL_EI_MODE(1) |
3679 /* 4 Program defaults and thresholds for RPS*/
3680 I915_WRITE(GEN6_RPNSWREQ,
3681 HSW_FREQUENCY(dev_priv->rps.rp1_freq));
3682 I915_WRITE(GEN6_RC_VIDEO_FREQ,
3683 HSW_FREQUENCY(dev_priv->rps.rp1_freq));
3684 /* NB: Docs say 1s, and 1000000 - which aren't equivalent */
3685 I915_WRITE(GEN6_RP_DOWN_TIMEOUT, 100000000 / 128); /* 1 second timeout */
3687 /* Docs recommend 900MHz, and 300 MHz respectively */
3688 I915_WRITE(GEN6_RP_INTERRUPT_LIMITS,
3689 dev_priv->rps.max_freq_softlimit << 24 |
3690 dev_priv->rps.min_freq_softlimit << 16);
3692 I915_WRITE(GEN6_RP_UP_THRESHOLD, 7600000 / 128); /* 76ms busyness per EI, 90% */
3693 I915_WRITE(GEN6_RP_DOWN_THRESHOLD, 31300000 / 128); /* 313ms busyness per EI, 70%*/
3694 I915_WRITE(GEN6_RP_UP_EI, 66000); /* 84.48ms, XXX: random? */
3695 I915_WRITE(GEN6_RP_DOWN_EI, 350000); /* 448ms, XXX: random? */
3697 I915_WRITE(GEN6_RP_IDLE_HYSTERSIS, 10);
3700 I915_WRITE(GEN6_RP_CONTROL,
3701 GEN6_RP_MEDIA_TURBO |
3702 GEN6_RP_MEDIA_HW_NORMAL_MODE |
3703 GEN6_RP_MEDIA_IS_GFX |
3705 GEN6_RP_UP_BUSY_AVG |
3706 GEN6_RP_DOWN_IDLE_AVG);
3708 /* 6: Ring frequency + overclocking (our driver does this later */
3710 gen6_set_rps(dev, (I915_READ(GEN6_GT_PERF_STATUS) & 0xff00) >> 8);
3712 gen8_enable_rps_interrupts(dev);
3714 gen6_gt_force_wake_put(dev_priv, FORCEWAKE_ALL);
3717 static void gen6_enable_rps(struct drm_device *dev)
3719 struct drm_i915_private *dev_priv = dev->dev_private;
3720 struct intel_engine_cs *ring;
3722 u32 rc6vids, pcu_mbox = 0, rc6_mask = 0;
3727 WARN_ON(!mutex_is_locked(&dev_priv->rps.hw_lock));
3729 /* Here begins a magic sequence of register writes to enable
3730 * auto-downclocking.
3732 * Perhaps there might be some value in exposing these to
3735 I915_WRITE(GEN6_RC_STATE, 0);
3737 /* Clear the DBG now so we don't confuse earlier errors */
3738 if ((gtfifodbg = I915_READ(GTFIFODBG))) {
3739 DRM_ERROR("GT fifo had a previous error %x\n", gtfifodbg);
3740 I915_WRITE(GTFIFODBG, gtfifodbg);
3743 gen6_gt_force_wake_get(dev_priv, FORCEWAKE_ALL);
3745 rp_state_cap = I915_READ(GEN6_RP_STATE_CAP);
3747 parse_rp_state_cap(dev_priv, rp_state_cap);
3749 /* disable the counters and set deterministic thresholds */
3750 I915_WRITE(GEN6_RC_CONTROL, 0);
3752 I915_WRITE(GEN6_RC1_WAKE_RATE_LIMIT, 1000 << 16);
3753 I915_WRITE(GEN6_RC6_WAKE_RATE_LIMIT, 40 << 16 | 30);
3754 I915_WRITE(GEN6_RC6pp_WAKE_RATE_LIMIT, 30);
3755 I915_WRITE(GEN6_RC_EVALUATION_INTERVAL, 125000);
3756 I915_WRITE(GEN6_RC_IDLE_HYSTERSIS, 25);
3758 for_each_ring(ring, dev_priv, i)
3759 I915_WRITE(RING_MAX_IDLE(ring->mmio_base), 10);
3761 I915_WRITE(GEN6_RC_SLEEP, 0);
3762 I915_WRITE(GEN6_RC1e_THRESHOLD, 1000);
3763 if (IS_IVYBRIDGE(dev))
3764 I915_WRITE(GEN6_RC6_THRESHOLD, 125000);
3766 I915_WRITE(GEN6_RC6_THRESHOLD, 50000);
3767 I915_WRITE(GEN6_RC6p_THRESHOLD, 150000);
3768 I915_WRITE(GEN6_RC6pp_THRESHOLD, 64000); /* unused */
3770 /* Check if we are enabling RC6 */
3771 rc6_mode = intel_enable_rc6(dev_priv->dev);
3772 if (rc6_mode & INTEL_RC6_ENABLE)
3773 rc6_mask |= GEN6_RC_CTL_RC6_ENABLE;
3775 /* We don't use those on Haswell */
3776 if (!IS_HASWELL(dev)) {
3777 if (rc6_mode & INTEL_RC6p_ENABLE)
3778 rc6_mask |= GEN6_RC_CTL_RC6p_ENABLE;
3780 if (rc6_mode & INTEL_RC6pp_ENABLE)
3781 rc6_mask |= GEN6_RC_CTL_RC6pp_ENABLE;
3784 intel_print_rc6_info(dev, rc6_mask);
3786 I915_WRITE(GEN6_RC_CONTROL,
3788 GEN6_RC_CTL_EI_MODE(1) |
3789 GEN6_RC_CTL_HW_ENABLE);
3791 /* Power down if completely idle for over 50ms */
3792 I915_WRITE(GEN6_RP_DOWN_TIMEOUT, 50000);
3793 I915_WRITE(GEN6_RP_IDLE_HYSTERSIS, 10);
3795 ret = sandybridge_pcode_write(dev_priv, GEN6_PCODE_WRITE_MIN_FREQ_TABLE, 0);
3797 DRM_DEBUG_DRIVER("Failed to set the min frequency\n");
3799 ret = sandybridge_pcode_read(dev_priv, GEN6_READ_OC_PARAMS, &pcu_mbox);
3800 if (!ret && (pcu_mbox & (1<<31))) { /* OC supported */
3801 DRM_DEBUG_DRIVER("Overclocking supported. Max: %dMHz, Overclock max: %dMHz\n",
3802 (dev_priv->rps.max_freq_softlimit & 0xff) * 50,
3803 (pcu_mbox & 0xff) * 50);
3804 dev_priv->rps.max_freq = pcu_mbox & 0xff;
3807 dev_priv->rps.power = HIGH_POWER; /* force a reset */
3808 gen6_set_rps(dev_priv->dev, dev_priv->rps.min_freq_softlimit);
3810 gen6_enable_rps_interrupts(dev);
3813 ret = sandybridge_pcode_read(dev_priv, GEN6_PCODE_READ_RC6VIDS, &rc6vids);
3814 if (IS_GEN6(dev) && ret) {
3815 DRM_DEBUG_DRIVER("Couldn't check for BIOS workaround\n");
3816 } else if (IS_GEN6(dev) && (GEN6_DECODE_RC6_VID(rc6vids & 0xff) < 450)) {
3817 DRM_DEBUG_DRIVER("You should update your BIOS. Correcting minimum rc6 voltage (%dmV->%dmV)\n",
3818 GEN6_DECODE_RC6_VID(rc6vids & 0xff), 450);
3819 rc6vids &= 0xffff00;
3820 rc6vids |= GEN6_ENCODE_RC6_VID(450);
3821 ret = sandybridge_pcode_write(dev_priv, GEN6_PCODE_WRITE_RC6VIDS, rc6vids);
3823 DRM_ERROR("Couldn't fix incorrect rc6 voltage\n");
3826 gen6_gt_force_wake_put(dev_priv, FORCEWAKE_ALL);
3829 static void __gen6_update_ring_freq(struct drm_device *dev)
3831 struct drm_i915_private *dev_priv = dev->dev_private;
3833 unsigned int gpu_freq;
3834 unsigned int max_ia_freq, min_ring_freq;
3835 int scaling_factor = 180;
3836 struct cpufreq_policy *policy;
3838 WARN_ON(!mutex_is_locked(&dev_priv->rps.hw_lock));
3840 policy = cpufreq_cpu_get(0);
3842 max_ia_freq = policy->cpuinfo.max_freq;
3843 cpufreq_cpu_put(policy);
3846 * Default to measured freq if none found, PCU will ensure we
3849 max_ia_freq = tsc_khz;
3852 /* Convert from kHz to MHz */
3853 max_ia_freq /= 1000;
3855 min_ring_freq = I915_READ(DCLK) & 0xf;
3856 /* convert DDR frequency from units of 266.6MHz to bandwidth */
3857 min_ring_freq = mult_frac(min_ring_freq, 8, 3);
3860 * For each potential GPU frequency, load a ring frequency we'd like
3861 * to use for memory access. We do this by specifying the IA frequency
3862 * the PCU should use as a reference to determine the ring frequency.
3864 for (gpu_freq = dev_priv->rps.max_freq_softlimit; gpu_freq >= dev_priv->rps.min_freq_softlimit;
3866 int diff = dev_priv->rps.max_freq_softlimit - gpu_freq;
3867 unsigned int ia_freq = 0, ring_freq = 0;
3869 if (INTEL_INFO(dev)->gen >= 8) {
3870 /* max(2 * GT, DDR). NB: GT is 50MHz units */
3871 ring_freq = max(min_ring_freq, gpu_freq);
3872 } else if (IS_HASWELL(dev)) {
3873 ring_freq = mult_frac(gpu_freq, 5, 4);
3874 ring_freq = max(min_ring_freq, ring_freq);
3875 /* leave ia_freq as the default, chosen by cpufreq */
3877 /* On older processors, there is no separate ring
3878 * clock domain, so in order to boost the bandwidth
3879 * of the ring, we need to upclock the CPU (ia_freq).
3881 * For GPU frequencies less than 750MHz,
3882 * just use the lowest ring freq.
3884 if (gpu_freq < min_freq)
3887 ia_freq = max_ia_freq - ((diff * scaling_factor) / 2);
3888 ia_freq = DIV_ROUND_CLOSEST(ia_freq, 100);
3891 sandybridge_pcode_write(dev_priv,
3892 GEN6_PCODE_WRITE_MIN_FREQ_TABLE,
3893 ia_freq << GEN6_PCODE_FREQ_IA_RATIO_SHIFT |
3894 ring_freq << GEN6_PCODE_FREQ_RING_RATIO_SHIFT |
3899 void gen6_update_ring_freq(struct drm_device *dev)
3901 struct drm_i915_private *dev_priv = dev->dev_private;
3903 if (INTEL_INFO(dev)->gen < 6 || IS_VALLEYVIEW(dev))
3906 mutex_lock(&dev_priv->rps.hw_lock);
3907 __gen6_update_ring_freq(dev);
3908 mutex_unlock(&dev_priv->rps.hw_lock);
3911 static int cherryview_rps_max_freq(struct drm_i915_private *dev_priv)
3915 val = vlv_punit_read(dev_priv, PUNIT_GPU_STATUS_REG);
3916 rp0 = (val >> PUNIT_GPU_STATUS_MAX_FREQ_SHIFT) & PUNIT_GPU_STATUS_MAX_FREQ_MASK;
3921 static int cherryview_rps_rpe_freq(struct drm_i915_private *dev_priv)
3925 val = vlv_punit_read(dev_priv, PUNIT_GPU_DUTYCYCLE_REG);
3926 rpe = (val >> PUNIT_GPU_DUTYCYCLE_RPE_FREQ_SHIFT) & PUNIT_GPU_DUTYCYCLE_RPE_FREQ_MASK;
3931 static int cherryview_rps_guar_freq(struct drm_i915_private *dev_priv)
3935 val = vlv_punit_read(dev_priv, PUNIT_REG_GPU_FREQ_STS);
3936 rp1 = (val >> PUNIT_GPU_STATUS_MAX_FREQ_SHIFT) & PUNIT_GPU_STATUS_MAX_FREQ_MASK;
3941 static int cherryview_rps_min_freq(struct drm_i915_private *dev_priv)
3945 val = vlv_punit_read(dev_priv, PUNIT_GPU_STATUS_REG);
3946 rpn = (val >> PUNIT_GPU_STATIS_GFX_MIN_FREQ_SHIFT) & PUNIT_GPU_STATUS_GFX_MIN_FREQ_MASK;
3950 static int valleyview_rps_guar_freq(struct drm_i915_private *dev_priv)
3954 val = vlv_nc_read(dev_priv, IOSF_NC_FB_GFX_FREQ_FUSE);
3956 rp1 = (val & FB_GFX_FGUARANTEED_FREQ_FUSE_MASK) >> FB_GFX_FGUARANTEED_FREQ_FUSE_SHIFT;
3961 static int valleyview_rps_max_freq(struct drm_i915_private *dev_priv)
3965 val = vlv_nc_read(dev_priv, IOSF_NC_FB_GFX_FREQ_FUSE);
3967 rp0 = (val & FB_GFX_MAX_FREQ_FUSE_MASK) >> FB_GFX_MAX_FREQ_FUSE_SHIFT;
3969 rp0 = min_t(u32, rp0, 0xea);
3974 static int valleyview_rps_rpe_freq(struct drm_i915_private *dev_priv)
3978 val = vlv_nc_read(dev_priv, IOSF_NC_FB_GFX_FMAX_FUSE_LO);
3979 rpe = (val & FB_FMAX_VMIN_FREQ_LO_MASK) >> FB_FMAX_VMIN_FREQ_LO_SHIFT;
3980 val = vlv_nc_read(dev_priv, IOSF_NC_FB_GFX_FMAX_FUSE_HI);
3981 rpe |= (val & FB_FMAX_VMIN_FREQ_HI_MASK) << 5;
3986 static int valleyview_rps_min_freq(struct drm_i915_private *dev_priv)
3988 return vlv_punit_read(dev_priv, PUNIT_REG_GPU_LFM) & 0xff;
3991 /* Check that the pctx buffer wasn't move under us. */
3992 static void valleyview_check_pctx(struct drm_i915_private *dev_priv)
3994 unsigned long pctx_addr = I915_READ(VLV_PCBR) & ~4095;
3996 WARN_ON(pctx_addr != dev_priv->mm.stolen_base +
3997 dev_priv->vlv_pctx->stolen->start);
4001 /* Check that the pcbr address is not empty. */
4002 static void cherryview_check_pctx(struct drm_i915_private *dev_priv)
4004 unsigned long pctx_addr = I915_READ(VLV_PCBR) & ~4095;
4006 WARN_ON((pctx_addr >> VLV_PCBR_ADDR_SHIFT) == 0);
4009 static void cherryview_setup_pctx(struct drm_device *dev)
4011 struct drm_i915_private *dev_priv = dev->dev_private;
4012 unsigned long pctx_paddr, paddr;
4013 struct i915_gtt *gtt = &dev_priv->gtt;
4015 int pctx_size = 32*1024;
4017 WARN_ON(!mutex_is_locked(&dev->struct_mutex));
4019 pcbr = I915_READ(VLV_PCBR);
4020 if ((pcbr >> VLV_PCBR_ADDR_SHIFT) == 0) {
4021 paddr = (dev_priv->mm.stolen_base +
4022 (gtt->stolen_size - pctx_size));
4024 pctx_paddr = (paddr & (~4095));
4025 I915_WRITE(VLV_PCBR, pctx_paddr);
4029 static void valleyview_setup_pctx(struct drm_device *dev)
4031 struct drm_i915_private *dev_priv = dev->dev_private;
4032 struct drm_i915_gem_object *pctx;
4033 unsigned long pctx_paddr;
4035 int pctx_size = 24*1024;
4037 WARN_ON(!mutex_is_locked(&dev->struct_mutex));
4039 pcbr = I915_READ(VLV_PCBR);
4041 /* BIOS set it up already, grab the pre-alloc'd space */
4044 pcbr_offset = (pcbr & (~4095)) - dev_priv->mm.stolen_base;
4045 pctx = i915_gem_object_create_stolen_for_preallocated(dev_priv->dev,
4047 I915_GTT_OFFSET_NONE,
4053 * From the Gunit register HAS:
4054 * The Gfx driver is expected to program this register and ensure
4055 * proper allocation within Gfx stolen memory. For example, this
4056 * register should be programmed such than the PCBR range does not
4057 * overlap with other ranges, such as the frame buffer, protected
4058 * memory, or any other relevant ranges.
4060 pctx = i915_gem_object_create_stolen(dev, pctx_size);
4062 DRM_DEBUG("not enough stolen space for PCTX, disabling\n");
4066 pctx_paddr = dev_priv->mm.stolen_base + pctx->stolen->start;
4067 I915_WRITE(VLV_PCBR, pctx_paddr);
4070 dev_priv->vlv_pctx = pctx;
4073 static void valleyview_cleanup_pctx(struct drm_device *dev)
4075 struct drm_i915_private *dev_priv = dev->dev_private;
4077 if (WARN_ON(!dev_priv->vlv_pctx))
4080 drm_gem_object_unreference(&dev_priv->vlv_pctx->base);
4081 dev_priv->vlv_pctx = NULL;
4084 static void valleyview_init_gt_powersave(struct drm_device *dev)
4086 struct drm_i915_private *dev_priv = dev->dev_private;
4088 valleyview_setup_pctx(dev);
4090 mutex_lock(&dev_priv->rps.hw_lock);
4092 dev_priv->rps.max_freq = valleyview_rps_max_freq(dev_priv);
4093 dev_priv->rps.rp0_freq = dev_priv->rps.max_freq;
4094 DRM_DEBUG_DRIVER("max GPU freq: %d MHz (%u)\n",
4095 vlv_gpu_freq(dev_priv, dev_priv->rps.max_freq),
4096 dev_priv->rps.max_freq);
4098 dev_priv->rps.efficient_freq = valleyview_rps_rpe_freq(dev_priv);
4099 DRM_DEBUG_DRIVER("RPe GPU freq: %d MHz (%u)\n",
4100 vlv_gpu_freq(dev_priv, dev_priv->rps.efficient_freq),
4101 dev_priv->rps.efficient_freq);
4103 dev_priv->rps.rp1_freq = valleyview_rps_guar_freq(dev_priv);
4104 DRM_DEBUG_DRIVER("RP1(Guar Freq) GPU freq: %d MHz (%u)\n",
4105 vlv_gpu_freq(dev_priv, dev_priv->rps.rp1_freq),
4106 dev_priv->rps.rp1_freq);
4108 dev_priv->rps.min_freq = valleyview_rps_min_freq(dev_priv);
4109 DRM_DEBUG_DRIVER("min GPU freq: %d MHz (%u)\n",
4110 vlv_gpu_freq(dev_priv, dev_priv->rps.min_freq),
4111 dev_priv->rps.min_freq);
4113 /* Preserve min/max settings in case of re-init */
4114 if (dev_priv->rps.max_freq_softlimit == 0)
4115 dev_priv->rps.max_freq_softlimit = dev_priv->rps.max_freq;
4117 if (dev_priv->rps.min_freq_softlimit == 0)
4118 dev_priv->rps.min_freq_softlimit = dev_priv->rps.min_freq;
4120 mutex_unlock(&dev_priv->rps.hw_lock);
4123 static void cherryview_init_gt_powersave(struct drm_device *dev)
4125 struct drm_i915_private *dev_priv = dev->dev_private;
4127 cherryview_setup_pctx(dev);
4129 mutex_lock(&dev_priv->rps.hw_lock);
4131 dev_priv->rps.max_freq = cherryview_rps_max_freq(dev_priv);
4132 dev_priv->rps.rp0_freq = dev_priv->rps.max_freq;
4133 DRM_DEBUG_DRIVER("max GPU freq: %d MHz (%u)\n",
4134 vlv_gpu_freq(dev_priv, dev_priv->rps.max_freq),
4135 dev_priv->rps.max_freq);
4137 dev_priv->rps.efficient_freq = cherryview_rps_rpe_freq(dev_priv);
4138 DRM_DEBUG_DRIVER("RPe GPU freq: %d MHz (%u)\n",
4139 vlv_gpu_freq(dev_priv, dev_priv->rps.efficient_freq),
4140 dev_priv->rps.efficient_freq);
4142 dev_priv->rps.rp1_freq = cherryview_rps_guar_freq(dev_priv);
4143 DRM_DEBUG_DRIVER("RP1(Guar) GPU freq: %d MHz (%u)\n",
4144 vlv_gpu_freq(dev_priv, dev_priv->rps.rp1_freq),
4145 dev_priv->rps.rp1_freq);
4147 dev_priv->rps.min_freq = cherryview_rps_min_freq(dev_priv);
4148 DRM_DEBUG_DRIVER("min GPU freq: %d MHz (%u)\n",
4149 vlv_gpu_freq(dev_priv, dev_priv->rps.min_freq),
4150 dev_priv->rps.min_freq);
4152 /* Preserve min/max settings in case of re-init */
4153 if (dev_priv->rps.max_freq_softlimit == 0)
4154 dev_priv->rps.max_freq_softlimit = dev_priv->rps.max_freq;
4156 if (dev_priv->rps.min_freq_softlimit == 0)
4157 dev_priv->rps.min_freq_softlimit = dev_priv->rps.min_freq;
4159 mutex_unlock(&dev_priv->rps.hw_lock);
4162 static void valleyview_cleanup_gt_powersave(struct drm_device *dev)
4164 valleyview_cleanup_pctx(dev);
4167 static void cherryview_enable_rps(struct drm_device *dev)
4169 struct drm_i915_private *dev_priv = dev->dev_private;
4170 struct intel_engine_cs *ring;
4171 u32 gtfifodbg, val, rc6_mode = 0, pcbr;
4174 WARN_ON(!mutex_is_locked(&dev_priv->rps.hw_lock));
4176 gtfifodbg = I915_READ(GTFIFODBG);
4178 DRM_DEBUG_DRIVER("GT fifo had a previous error %x\n",
4180 I915_WRITE(GTFIFODBG, gtfifodbg);
4183 cherryview_check_pctx(dev_priv);
4185 /* 1a & 1b: Get forcewake during program sequence. Although the driver
4186 * hasn't enabled a state yet where we need forcewake, BIOS may have.*/
4187 gen6_gt_force_wake_get(dev_priv, FORCEWAKE_ALL);
4189 /* 2a: Program RC6 thresholds.*/
4190 I915_WRITE(GEN6_RC6_WAKE_RATE_LIMIT, 40 << 16);
4191 I915_WRITE(GEN6_RC_EVALUATION_INTERVAL, 125000); /* 12500 * 1280ns */
4192 I915_WRITE(GEN6_RC_IDLE_HYSTERSIS, 25); /* 25 * 1280ns */
4194 for_each_ring(ring, dev_priv, i)
4195 I915_WRITE(RING_MAX_IDLE(ring->mmio_base), 10);
4196 I915_WRITE(GEN6_RC_SLEEP, 0);
4198 I915_WRITE(GEN6_RC6_THRESHOLD, 50000); /* 50/125ms per EI */
4200 /* allows RC6 residency counter to work */
4201 I915_WRITE(VLV_COUNTER_CONTROL,
4202 _MASKED_BIT_ENABLE(VLV_COUNT_RANGE_HIGH |
4203 VLV_MEDIA_RC6_COUNT_EN |
4204 VLV_RENDER_RC6_COUNT_EN));
4206 /* For now we assume BIOS is allocating and populating the PCBR */
4207 pcbr = I915_READ(VLV_PCBR);
4209 DRM_DEBUG_DRIVER("PCBR offset : 0x%x\n", pcbr);
4212 if ((intel_enable_rc6(dev) & INTEL_RC6_ENABLE) &&
4213 (pcbr >> VLV_PCBR_ADDR_SHIFT))
4214 rc6_mode = GEN6_RC_CTL_EI_MODE(1);
4216 I915_WRITE(GEN6_RC_CONTROL, rc6_mode);
4218 /* 4 Program defaults and thresholds for RPS*/
4219 I915_WRITE(GEN6_RP_UP_THRESHOLD, 59400);
4220 I915_WRITE(GEN6_RP_DOWN_THRESHOLD, 245000);
4221 I915_WRITE(GEN6_RP_UP_EI, 66000);
4222 I915_WRITE(GEN6_RP_DOWN_EI, 350000);
4224 I915_WRITE(GEN6_RP_IDLE_HYSTERSIS, 10);
4226 /* WaDisablePwrmtrEvent:chv (pre-production hw) */
4227 I915_WRITE(0xA80C, I915_READ(0xA80C) & 0x00ffffff);
4228 I915_WRITE(0xA810, I915_READ(0xA810) & 0xffffff00);
4231 I915_WRITE(GEN6_RP_CONTROL,
4232 GEN6_RP_MEDIA_HW_NORMAL_MODE |
4233 GEN6_RP_MEDIA_IS_GFX | /* WaSetMaskForGfxBusyness:chv (pre-production hw ?) */
4235 GEN6_RP_UP_BUSY_AVG |
4236 GEN6_RP_DOWN_IDLE_AVG);
4238 val = vlv_punit_read(dev_priv, PUNIT_REG_GPU_FREQ_STS);
4240 DRM_DEBUG_DRIVER("GPLL enabled? %s\n", val & 0x10 ? "yes" : "no");
4241 DRM_DEBUG_DRIVER("GPU status: 0x%08x\n", val);
4243 dev_priv->rps.cur_freq = (val >> 8) & 0xff;
4244 DRM_DEBUG_DRIVER("current GPU freq: %d MHz (%u)\n",
4245 vlv_gpu_freq(dev_priv, dev_priv->rps.cur_freq),
4246 dev_priv->rps.cur_freq);
4248 DRM_DEBUG_DRIVER("setting GPU freq to %d MHz (%u)\n",
4249 vlv_gpu_freq(dev_priv, dev_priv->rps.efficient_freq),
4250 dev_priv->rps.efficient_freq);
4252 valleyview_set_rps(dev_priv->dev, dev_priv->rps.efficient_freq);
4254 gen8_enable_rps_interrupts(dev);
4256 gen6_gt_force_wake_put(dev_priv, FORCEWAKE_ALL);
4259 static void valleyview_enable_rps(struct drm_device *dev)
4261 struct drm_i915_private *dev_priv = dev->dev_private;
4262 struct intel_engine_cs *ring;
4263 u32 gtfifodbg, val, rc6_mode = 0;
4266 WARN_ON(!mutex_is_locked(&dev_priv->rps.hw_lock));
4268 valleyview_check_pctx(dev_priv);
4270 if ((gtfifodbg = I915_READ(GTFIFODBG))) {
4271 DRM_DEBUG_DRIVER("GT fifo had a previous error %x\n",
4273 I915_WRITE(GTFIFODBG, gtfifodbg);
4276 /* If VLV, Forcewake all wells, else re-direct to regular path */
4277 gen6_gt_force_wake_get(dev_priv, FORCEWAKE_ALL);
4279 I915_WRITE(GEN6_RP_UP_THRESHOLD, 59400);
4280 I915_WRITE(GEN6_RP_DOWN_THRESHOLD, 245000);
4281 I915_WRITE(GEN6_RP_UP_EI, 66000);
4282 I915_WRITE(GEN6_RP_DOWN_EI, 350000);
4284 I915_WRITE(GEN6_RP_IDLE_HYSTERSIS, 10);
4285 I915_WRITE(GEN6_RP_DOWN_TIMEOUT, 0xf4240);
4287 I915_WRITE(GEN6_RP_CONTROL,
4288 GEN6_RP_MEDIA_TURBO |
4289 GEN6_RP_MEDIA_HW_NORMAL_MODE |
4290 GEN6_RP_MEDIA_IS_GFX |
4292 GEN6_RP_UP_BUSY_AVG |
4293 GEN6_RP_DOWN_IDLE_CONT);
4295 I915_WRITE(GEN6_RC6_WAKE_RATE_LIMIT, 0x00280000);
4296 I915_WRITE(GEN6_RC_EVALUATION_INTERVAL, 125000);
4297 I915_WRITE(GEN6_RC_IDLE_HYSTERSIS, 25);
4299 for_each_ring(ring, dev_priv, i)
4300 I915_WRITE(RING_MAX_IDLE(ring->mmio_base), 10);
4302 I915_WRITE(GEN6_RC6_THRESHOLD, 0x557);
4304 /* allows RC6 residency counter to work */
4305 I915_WRITE(VLV_COUNTER_CONTROL,
4306 _MASKED_BIT_ENABLE(VLV_MEDIA_RC0_COUNT_EN |
4307 VLV_RENDER_RC0_COUNT_EN |
4308 VLV_MEDIA_RC6_COUNT_EN |
4309 VLV_RENDER_RC6_COUNT_EN));
4311 if (intel_enable_rc6(dev) & INTEL_RC6_ENABLE)
4312 rc6_mode = GEN7_RC_CTL_TO_MODE | VLV_RC_CTL_CTX_RST_PARALLEL;
4314 intel_print_rc6_info(dev, rc6_mode);
4316 I915_WRITE(GEN6_RC_CONTROL, rc6_mode);
4318 val = vlv_punit_read(dev_priv, PUNIT_REG_GPU_FREQ_STS);
4320 DRM_DEBUG_DRIVER("GPLL enabled? %s\n", val & 0x10 ? "yes" : "no");
4321 DRM_DEBUG_DRIVER("GPU status: 0x%08x\n", val);
4323 dev_priv->rps.cur_freq = (val >> 8) & 0xff;
4324 DRM_DEBUG_DRIVER("current GPU freq: %d MHz (%u)\n",
4325 vlv_gpu_freq(dev_priv, dev_priv->rps.cur_freq),
4326 dev_priv->rps.cur_freq);
4328 DRM_DEBUG_DRIVER("setting GPU freq to %d MHz (%u)\n",
4329 vlv_gpu_freq(dev_priv, dev_priv->rps.efficient_freq),
4330 dev_priv->rps.efficient_freq);
4332 valleyview_set_rps(dev_priv->dev, dev_priv->rps.efficient_freq);
4334 gen6_enable_rps_interrupts(dev);
4336 gen6_gt_force_wake_put(dev_priv, FORCEWAKE_ALL);
4339 void ironlake_teardown_rc6(struct drm_device *dev)
4341 struct drm_i915_private *dev_priv = dev->dev_private;
4343 if (dev_priv->ips.renderctx) {
4344 i915_gem_object_ggtt_unpin(dev_priv->ips.renderctx);
4345 drm_gem_object_unreference(&dev_priv->ips.renderctx->base);
4346 dev_priv->ips.renderctx = NULL;
4349 if (dev_priv->ips.pwrctx) {
4350 i915_gem_object_ggtt_unpin(dev_priv->ips.pwrctx);
4351 drm_gem_object_unreference(&dev_priv->ips.pwrctx->base);
4352 dev_priv->ips.pwrctx = NULL;
4356 static void ironlake_disable_rc6(struct drm_device *dev)
4358 struct drm_i915_private *dev_priv = dev->dev_private;
4360 if (I915_READ(PWRCTXA)) {
4361 /* Wake the GPU, prevent RC6, then restore RSTDBYCTL */
4362 I915_WRITE(RSTDBYCTL, I915_READ(RSTDBYCTL) | RCX_SW_EXIT);
4363 wait_for(((I915_READ(RSTDBYCTL) & RSX_STATUS_MASK) == RSX_STATUS_ON),
4366 I915_WRITE(PWRCTXA, 0);
4367 POSTING_READ(PWRCTXA);
4369 I915_WRITE(RSTDBYCTL, I915_READ(RSTDBYCTL) & ~RCX_SW_EXIT);
4370 POSTING_READ(RSTDBYCTL);
4374 static int ironlake_setup_rc6(struct drm_device *dev)
4376 struct drm_i915_private *dev_priv = dev->dev_private;
4378 if (dev_priv->ips.renderctx == NULL)
4379 dev_priv->ips.renderctx = intel_alloc_context_page(dev);
4380 if (!dev_priv->ips.renderctx)
4383 if (dev_priv->ips.pwrctx == NULL)
4384 dev_priv->ips.pwrctx = intel_alloc_context_page(dev);
4385 if (!dev_priv->ips.pwrctx) {
4386 ironlake_teardown_rc6(dev);
4393 static void ironlake_enable_rc6(struct drm_device *dev)
4395 struct drm_i915_private *dev_priv = dev->dev_private;
4396 struct intel_engine_cs *ring = &dev_priv->ring[RCS];
4397 bool was_interruptible;
4400 /* rc6 disabled by default due to repeated reports of hanging during
4403 if (!intel_enable_rc6(dev))
4406 WARN_ON(!mutex_is_locked(&dev->struct_mutex));
4408 ret = ironlake_setup_rc6(dev);
4412 was_interruptible = dev_priv->mm.interruptible;
4413 dev_priv->mm.interruptible = false;
4416 * GPU can automatically power down the render unit if given a page
4419 ret = intel_ring_begin(ring, 6);
4421 ironlake_teardown_rc6(dev);
4422 dev_priv->mm.interruptible = was_interruptible;
4426 intel_ring_emit(ring, MI_SUSPEND_FLUSH | MI_SUSPEND_FLUSH_EN);
4427 intel_ring_emit(ring, MI_SET_CONTEXT);
4428 intel_ring_emit(ring, i915_gem_obj_ggtt_offset(dev_priv->ips.renderctx) |
4430 MI_SAVE_EXT_STATE_EN |
4431 MI_RESTORE_EXT_STATE_EN |
4432 MI_RESTORE_INHIBIT);
4433 intel_ring_emit(ring, MI_SUSPEND_FLUSH);
4434 intel_ring_emit(ring, MI_NOOP);
4435 intel_ring_emit(ring, MI_FLUSH);
4436 intel_ring_advance(ring);
4439 * Wait for the command parser to advance past MI_SET_CONTEXT. The HW
4440 * does an implicit flush, combined with MI_FLUSH above, it should be
4441 * safe to assume that renderctx is valid
4443 ret = intel_ring_idle(ring);
4444 dev_priv->mm.interruptible = was_interruptible;
4446 DRM_ERROR("failed to enable ironlake power savings\n");
4447 ironlake_teardown_rc6(dev);
4451 I915_WRITE(PWRCTXA, i915_gem_obj_ggtt_offset(dev_priv->ips.pwrctx) | PWRCTX_EN);
4452 I915_WRITE(RSTDBYCTL, I915_READ(RSTDBYCTL) & ~RCX_SW_EXIT);
4454 intel_print_rc6_info(dev, GEN6_RC_CTL_RC6_ENABLE);
4457 static unsigned long intel_pxfreq(u32 vidfreq)
4460 int div = (vidfreq & 0x3f0000) >> 16;
4461 int post = (vidfreq & 0x3000) >> 12;
4462 int pre = (vidfreq & 0x7);
4467 freq = ((div * 133333) / ((1<<post) * pre));
4472 static const struct cparams {
4478 { 1, 1333, 301, 28664 },
4479 { 1, 1066, 294, 24460 },
4480 { 1, 800, 294, 25192 },
4481 { 0, 1333, 276, 27605 },
4482 { 0, 1066, 276, 27605 },
4483 { 0, 800, 231, 23784 },
4486 static unsigned long __i915_chipset_val(struct drm_i915_private *dev_priv)
4488 u64 total_count, diff, ret;
4489 u32 count1, count2, count3, m = 0, c = 0;
4490 unsigned long now = jiffies_to_msecs(jiffies), diff1;
4493 assert_spin_locked(&mchdev_lock);
4495 diff1 = now - dev_priv->ips.last_time1;
4497 /* Prevent division-by-zero if we are asking too fast.
4498 * Also, we don't get interesting results if we are polling
4499 * faster than once in 10ms, so just return the saved value
4503 return dev_priv->ips.chipset_power;
4505 count1 = I915_READ(DMIEC);
4506 count2 = I915_READ(DDREC);
4507 count3 = I915_READ(CSIEC);
4509 total_count = count1 + count2 + count3;
4511 /* FIXME: handle per-counter overflow */
4512 if (total_count < dev_priv->ips.last_count1) {
4513 diff = ~0UL - dev_priv->ips.last_count1;
4514 diff += total_count;
4516 diff = total_count - dev_priv->ips.last_count1;
4519 for (i = 0; i < ARRAY_SIZE(cparams); i++) {
4520 if (cparams[i].i == dev_priv->ips.c_m &&
4521 cparams[i].t == dev_priv->ips.r_t) {
4528 diff = div_u64(diff, diff1);
4529 ret = ((m * diff) + c);
4530 ret = div_u64(ret, 10);
4532 dev_priv->ips.last_count1 = total_count;
4533 dev_priv->ips.last_time1 = now;
4535 dev_priv->ips.chipset_power = ret;
4540 unsigned long i915_chipset_val(struct drm_i915_private *dev_priv)
4542 struct drm_device *dev = dev_priv->dev;
4545 if (INTEL_INFO(dev)->gen != 5)
4548 spin_lock_irq(&mchdev_lock);
4550 val = __i915_chipset_val(dev_priv);
4552 spin_unlock_irq(&mchdev_lock);
4557 unsigned long i915_mch_val(struct drm_i915_private *dev_priv)
4559 unsigned long m, x, b;
4562 tsfs = I915_READ(TSFS);
4564 m = ((tsfs & TSFS_SLOPE_MASK) >> TSFS_SLOPE_SHIFT);
4565 x = I915_READ8(TR1);
4567 b = tsfs & TSFS_INTR_MASK;
4569 return ((m * x) / 127) - b;
4572 static u16 pvid_to_extvid(struct drm_i915_private *dev_priv, u8 pxvid)
4574 struct drm_device *dev = dev_priv->dev;
4575 static const struct v_table {
4576 u16 vd; /* in .1 mil */
4577 u16 vm; /* in .1 mil */
4708 if (INTEL_INFO(dev)->is_mobile)
4709 return v_table[pxvid].vm;
4711 return v_table[pxvid].vd;
4714 static void __i915_update_gfx_val(struct drm_i915_private *dev_priv)
4716 u64 now, diff, diffms;
4719 assert_spin_locked(&mchdev_lock);
4721 now = ktime_get_raw_ns();
4722 diffms = now - dev_priv->ips.last_time2;
4723 do_div(diffms, NSEC_PER_MSEC);
4725 /* Don't divide by 0 */
4729 count = I915_READ(GFXEC);
4731 if (count < dev_priv->ips.last_count2) {
4732 diff = ~0UL - dev_priv->ips.last_count2;
4735 diff = count - dev_priv->ips.last_count2;
4738 dev_priv->ips.last_count2 = count;
4739 dev_priv->ips.last_time2 = now;
4741 /* More magic constants... */
4743 diff = div_u64(diff, diffms * 10);
4744 dev_priv->ips.gfx_power = diff;
4747 void i915_update_gfx_val(struct drm_i915_private *dev_priv)
4749 struct drm_device *dev = dev_priv->dev;
4751 if (INTEL_INFO(dev)->gen != 5)
4754 spin_lock_irq(&mchdev_lock);
4756 __i915_update_gfx_val(dev_priv);
4758 spin_unlock_irq(&mchdev_lock);
4761 static unsigned long __i915_gfx_val(struct drm_i915_private *dev_priv)
4763 unsigned long t, corr, state1, corr2, state2;
4766 assert_spin_locked(&mchdev_lock);
4768 pxvid = I915_READ(PXVFREQ_BASE + (dev_priv->rps.cur_freq * 4));
4769 pxvid = (pxvid >> 24) & 0x7f;
4770 ext_v = pvid_to_extvid(dev_priv, pxvid);
4774 t = i915_mch_val(dev_priv);
4776 /* Revel in the empirically derived constants */
4778 /* Correction factor in 1/100000 units */
4780 corr = ((t * 2349) + 135940);
4782 corr = ((t * 964) + 29317);
4784 corr = ((t * 301) + 1004);
4786 corr = corr * ((150142 * state1) / 10000 - 78642);
4788 corr2 = (corr * dev_priv->ips.corr);
4790 state2 = (corr2 * state1) / 10000;
4791 state2 /= 100; /* convert to mW */
4793 __i915_update_gfx_val(dev_priv);
4795 return dev_priv->ips.gfx_power + state2;
4798 unsigned long i915_gfx_val(struct drm_i915_private *dev_priv)
4800 struct drm_device *dev = dev_priv->dev;
4803 if (INTEL_INFO(dev)->gen != 5)
4806 spin_lock_irq(&mchdev_lock);
4808 val = __i915_gfx_val(dev_priv);
4810 spin_unlock_irq(&mchdev_lock);
4816 * i915_read_mch_val - return value for IPS use
4818 * Calculate and return a value for the IPS driver to use when deciding whether
4819 * we have thermal and power headroom to increase CPU or GPU power budget.
4821 unsigned long i915_read_mch_val(void)
4823 struct drm_i915_private *dev_priv;
4824 unsigned long chipset_val, graphics_val, ret = 0;
4826 spin_lock_irq(&mchdev_lock);
4829 dev_priv = i915_mch_dev;
4831 chipset_val = __i915_chipset_val(dev_priv);
4832 graphics_val = __i915_gfx_val(dev_priv);
4834 ret = chipset_val + graphics_val;
4837 spin_unlock_irq(&mchdev_lock);
4841 EXPORT_SYMBOL_GPL(i915_read_mch_val);
4844 * i915_gpu_raise - raise GPU frequency limit
4846 * Raise the limit; IPS indicates we have thermal headroom.
4848 bool i915_gpu_raise(void)
4850 struct drm_i915_private *dev_priv;
4853 spin_lock_irq(&mchdev_lock);
4854 if (!i915_mch_dev) {
4858 dev_priv = i915_mch_dev;
4860 if (dev_priv->ips.max_delay > dev_priv->ips.fmax)
4861 dev_priv->ips.max_delay--;
4864 spin_unlock_irq(&mchdev_lock);
4868 EXPORT_SYMBOL_GPL(i915_gpu_raise);
4871 * i915_gpu_lower - lower GPU frequency limit
4873 * IPS indicates we're close to a thermal limit, so throttle back the GPU
4874 * frequency maximum.
4876 bool i915_gpu_lower(void)
4878 struct drm_i915_private *dev_priv;
4881 spin_lock_irq(&mchdev_lock);
4882 if (!i915_mch_dev) {
4886 dev_priv = i915_mch_dev;
4888 if (dev_priv->ips.max_delay < dev_priv->ips.min_delay)
4889 dev_priv->ips.max_delay++;
4892 spin_unlock_irq(&mchdev_lock);
4896 EXPORT_SYMBOL_GPL(i915_gpu_lower);
4899 * i915_gpu_busy - indicate GPU business to IPS
4901 * Tell the IPS driver whether or not the GPU is busy.
4903 bool i915_gpu_busy(void)
4905 struct drm_i915_private *dev_priv;
4906 struct intel_engine_cs *ring;
4910 spin_lock_irq(&mchdev_lock);
4913 dev_priv = i915_mch_dev;
4915 for_each_ring(ring, dev_priv, i)
4916 ret |= !list_empty(&ring->request_list);
4919 spin_unlock_irq(&mchdev_lock);
4923 EXPORT_SYMBOL_GPL(i915_gpu_busy);
4926 * i915_gpu_turbo_disable - disable graphics turbo
4928 * Disable graphics turbo by resetting the max frequency and setting the
4929 * current frequency to the default.
4931 bool i915_gpu_turbo_disable(void)
4933 struct drm_i915_private *dev_priv;
4936 spin_lock_irq(&mchdev_lock);
4937 if (!i915_mch_dev) {
4941 dev_priv = i915_mch_dev;
4943 dev_priv->ips.max_delay = dev_priv->ips.fstart;
4945 if (!ironlake_set_drps(dev_priv->dev, dev_priv->ips.fstart))
4949 spin_unlock_irq(&mchdev_lock);
4953 EXPORT_SYMBOL_GPL(i915_gpu_turbo_disable);
4956 * Tells the intel_ips driver that the i915 driver is now loaded, if
4957 * IPS got loaded first.
4959 * This awkward dance is so that neither module has to depend on the
4960 * other in order for IPS to do the appropriate communication of
4961 * GPU turbo limits to i915.
4964 ips_ping_for_i915_load(void)
4968 link = symbol_get(ips_link_to_i915_driver);
4971 symbol_put(ips_link_to_i915_driver);
4975 void intel_gpu_ips_init(struct drm_i915_private *dev_priv)
4977 /* We only register the i915 ips part with intel-ips once everything is
4978 * set up, to avoid intel-ips sneaking in and reading bogus values. */
4979 spin_lock_irq(&mchdev_lock);
4980 i915_mch_dev = dev_priv;
4981 spin_unlock_irq(&mchdev_lock);
4983 ips_ping_for_i915_load();
4986 void intel_gpu_ips_teardown(void)
4988 spin_lock_irq(&mchdev_lock);
4989 i915_mch_dev = NULL;
4990 spin_unlock_irq(&mchdev_lock);
4993 static void intel_init_emon(struct drm_device *dev)
4995 struct drm_i915_private *dev_priv = dev->dev_private;
5000 /* Disable to program */
5004 /* Program energy weights for various events */
5005 I915_WRITE(SDEW, 0x15040d00);
5006 I915_WRITE(CSIEW0, 0x007f0000);
5007 I915_WRITE(CSIEW1, 0x1e220004);
5008 I915_WRITE(CSIEW2, 0x04000004);
5010 for (i = 0; i < 5; i++)
5011 I915_WRITE(PEW + (i * 4), 0);
5012 for (i = 0; i < 3; i++)
5013 I915_WRITE(DEW + (i * 4), 0);
5015 /* Program P-state weights to account for frequency power adjustment */
5016 for (i = 0; i < 16; i++) {
5017 u32 pxvidfreq = I915_READ(PXVFREQ_BASE + (i * 4));
5018 unsigned long freq = intel_pxfreq(pxvidfreq);
5019 unsigned long vid = (pxvidfreq & PXVFREQ_PX_MASK) >>
5024 val *= (freq / 1000);
5026 val /= (127*127*900);
5028 DRM_ERROR("bad pxval: %ld\n", val);
5031 /* Render standby states get 0 weight */
5035 for (i = 0; i < 4; i++) {
5036 u32 val = (pxw[i*4] << 24) | (pxw[(i*4)+1] << 16) |
5037 (pxw[(i*4)+2] << 8) | (pxw[(i*4)+3]);
5038 I915_WRITE(PXW + (i * 4), val);
5041 /* Adjust magic regs to magic values (more experimental results) */
5042 I915_WRITE(OGW0, 0);
5043 I915_WRITE(OGW1, 0);
5044 I915_WRITE(EG0, 0x00007f00);
5045 I915_WRITE(EG1, 0x0000000e);
5046 I915_WRITE(EG2, 0x000e0000);
5047 I915_WRITE(EG3, 0x68000300);
5048 I915_WRITE(EG4, 0x42000000);
5049 I915_WRITE(EG5, 0x00140031);
5053 for (i = 0; i < 8; i++)
5054 I915_WRITE(PXWL + (i * 4), 0);
5056 /* Enable PMON + select events */
5057 I915_WRITE(ECR, 0x80000019);
5059 lcfuse = I915_READ(LCFUSE02);
5061 dev_priv->ips.corr = (lcfuse & LCFUSE_HIV_MASK);
5064 void intel_init_gt_powersave(struct drm_device *dev)
5066 i915.enable_rc6 = sanitize_rc6_option(dev, i915.enable_rc6);
5068 if (IS_CHERRYVIEW(dev))
5069 cherryview_init_gt_powersave(dev);
5070 else if (IS_VALLEYVIEW(dev))
5071 valleyview_init_gt_powersave(dev);
5074 void intel_cleanup_gt_powersave(struct drm_device *dev)
5076 if (IS_CHERRYVIEW(dev))
5078 else if (IS_VALLEYVIEW(dev))
5079 valleyview_cleanup_gt_powersave(dev);
5083 * intel_suspend_gt_powersave - suspend PM work and helper threads
5086 * We don't want to disable RC6 or other features here, we just want
5087 * to make sure any work we've queued has finished and won't bother
5088 * us while we're suspended.
5090 void intel_suspend_gt_powersave(struct drm_device *dev)
5092 struct drm_i915_private *dev_priv = dev->dev_private;
5094 /* Interrupts should be disabled already to avoid re-arming. */
5095 WARN_ON(intel_irqs_enabled(dev_priv));
5097 flush_delayed_work(&dev_priv->rps.delayed_resume_work);
5099 cancel_work_sync(&dev_priv->rps.work);
5101 /* Force GPU to min freq during suspend */
5102 gen6_rps_idle(dev_priv);
5105 void intel_disable_gt_powersave(struct drm_device *dev)
5107 struct drm_i915_private *dev_priv = dev->dev_private;
5109 /* Interrupts should be disabled already to avoid re-arming. */
5110 WARN_ON(intel_irqs_enabled(dev_priv));
5112 if (IS_IRONLAKE_M(dev)) {
5113 ironlake_disable_drps(dev);
5114 ironlake_disable_rc6(dev);
5115 } else if (INTEL_INFO(dev)->gen >= 6) {
5116 intel_suspend_gt_powersave(dev);
5118 mutex_lock(&dev_priv->rps.hw_lock);
5119 if (IS_CHERRYVIEW(dev))
5120 cherryview_disable_rps(dev);
5121 else if (IS_VALLEYVIEW(dev))
5122 valleyview_disable_rps(dev);
5124 gen6_disable_rps(dev);
5125 dev_priv->rps.enabled = false;
5126 mutex_unlock(&dev_priv->rps.hw_lock);
5130 static void intel_gen6_powersave_work(struct work_struct *work)
5132 struct drm_i915_private *dev_priv =
5133 container_of(work, struct drm_i915_private,
5134 rps.delayed_resume_work.work);
5135 struct drm_device *dev = dev_priv->dev;
5137 mutex_lock(&dev_priv->rps.hw_lock);
5139 if (IS_CHERRYVIEW(dev)) {
5140 cherryview_enable_rps(dev);
5141 } else if (IS_VALLEYVIEW(dev)) {
5142 valleyview_enable_rps(dev);
5143 } else if (IS_BROADWELL(dev)) {
5144 gen8_enable_rps(dev);
5145 __gen6_update_ring_freq(dev);
5147 gen6_enable_rps(dev);
5148 __gen6_update_ring_freq(dev);
5150 dev_priv->rps.enabled = true;
5151 mutex_unlock(&dev_priv->rps.hw_lock);
5153 intel_runtime_pm_put(dev_priv);
5156 void intel_enable_gt_powersave(struct drm_device *dev)
5158 struct drm_i915_private *dev_priv = dev->dev_private;
5160 if (IS_IRONLAKE_M(dev)) {
5161 mutex_lock(&dev->struct_mutex);
5162 ironlake_enable_drps(dev);
5163 ironlake_enable_rc6(dev);
5164 intel_init_emon(dev);
5165 mutex_unlock(&dev->struct_mutex);
5166 } else if (INTEL_INFO(dev)->gen >= 6) {
5168 * PCU communication is slow and this doesn't need to be
5169 * done at any specific time, so do this out of our fast path
5170 * to make resume and init faster.
5172 * We depend on the HW RC6 power context save/restore
5173 * mechanism when entering D3 through runtime PM suspend. So
5174 * disable RPM until RPS/RC6 is properly setup. We can only
5175 * get here via the driver load/system resume/runtime resume
5176 * paths, so the _noresume version is enough (and in case of
5177 * runtime resume it's necessary).
5179 if (schedule_delayed_work(&dev_priv->rps.delayed_resume_work,
5180 round_jiffies_up_relative(HZ)))
5181 intel_runtime_pm_get_noresume(dev_priv);
5185 void intel_reset_gt_powersave(struct drm_device *dev)
5187 struct drm_i915_private *dev_priv = dev->dev_private;
5189 dev_priv->rps.enabled = false;
5190 intel_enable_gt_powersave(dev);
5193 static void ibx_init_clock_gating(struct drm_device *dev)
5195 struct drm_i915_private *dev_priv = dev->dev_private;
5198 * On Ibex Peak and Cougar Point, we need to disable clock
5199 * gating for the panel power sequencer or it will fail to
5200 * start up when no ports are active.
5202 I915_WRITE(SOUTH_DSPCLK_GATE_D, PCH_DPLSUNIT_CLOCK_GATE_DISABLE);
5205 static void g4x_disable_trickle_feed(struct drm_device *dev)
5207 struct drm_i915_private *dev_priv = dev->dev_private;
5210 for_each_pipe(pipe) {
5211 I915_WRITE(DSPCNTR(pipe),
5212 I915_READ(DSPCNTR(pipe)) |
5213 DISPPLANE_TRICKLE_FEED_DISABLE);
5214 intel_flush_primary_plane(dev_priv, pipe);
5218 static void ilk_init_lp_watermarks(struct drm_device *dev)
5220 struct drm_i915_private *dev_priv = dev->dev_private;
5222 I915_WRITE(WM3_LP_ILK, I915_READ(WM3_LP_ILK) & ~WM1_LP_SR_EN);
5223 I915_WRITE(WM2_LP_ILK, I915_READ(WM2_LP_ILK) & ~WM1_LP_SR_EN);
5224 I915_WRITE(WM1_LP_ILK, I915_READ(WM1_LP_ILK) & ~WM1_LP_SR_EN);
5227 * Don't touch WM1S_LP_EN here.
5228 * Doing so could cause underruns.
5232 static void ironlake_init_clock_gating(struct drm_device *dev)
5234 struct drm_i915_private *dev_priv = dev->dev_private;
5235 uint32_t dspclk_gate = ILK_VRHUNIT_CLOCK_GATE_DISABLE;
5239 * WaFbcDisableDpfcClockGating:ilk
5241 dspclk_gate |= ILK_DPFCRUNIT_CLOCK_GATE_DISABLE |
5242 ILK_DPFCUNIT_CLOCK_GATE_DISABLE |
5243 ILK_DPFDUNIT_CLOCK_GATE_ENABLE;
5245 I915_WRITE(PCH_3DCGDIS0,
5246 MARIUNIT_CLOCK_GATE_DISABLE |
5247 SVSMUNIT_CLOCK_GATE_DISABLE);
5248 I915_WRITE(PCH_3DCGDIS1,
5249 VFMUNIT_CLOCK_GATE_DISABLE);
5252 * According to the spec the following bits should be set in
5253 * order to enable memory self-refresh
5254 * The bit 22/21 of 0x42004
5255 * The bit 5 of 0x42020
5256 * The bit 15 of 0x45000
5258 I915_WRITE(ILK_DISPLAY_CHICKEN2,
5259 (I915_READ(ILK_DISPLAY_CHICKEN2) |
5260 ILK_DPARB_GATE | ILK_VSDPFD_FULL));
5261 dspclk_gate |= ILK_DPARBUNIT_CLOCK_GATE_ENABLE;
5262 I915_WRITE(DISP_ARB_CTL,
5263 (I915_READ(DISP_ARB_CTL) |
5266 ilk_init_lp_watermarks(dev);
5269 * Based on the document from hardware guys the following bits
5270 * should be set unconditionally in order to enable FBC.
5271 * The bit 22 of 0x42000
5272 * The bit 22 of 0x42004
5273 * The bit 7,8,9 of 0x42020.
5275 if (IS_IRONLAKE_M(dev)) {
5276 /* WaFbcAsynchFlipDisableFbcQueue:ilk */
5277 I915_WRITE(ILK_DISPLAY_CHICKEN1,
5278 I915_READ(ILK_DISPLAY_CHICKEN1) |
5280 I915_WRITE(ILK_DISPLAY_CHICKEN2,
5281 I915_READ(ILK_DISPLAY_CHICKEN2) |
5285 I915_WRITE(ILK_DSPCLK_GATE_D, dspclk_gate);
5287 I915_WRITE(ILK_DISPLAY_CHICKEN2,
5288 I915_READ(ILK_DISPLAY_CHICKEN2) |
5289 ILK_ELPIN_409_SELECT);
5290 I915_WRITE(_3D_CHICKEN2,
5291 _3D_CHICKEN2_WM_READ_PIPELINED << 16 |
5292 _3D_CHICKEN2_WM_READ_PIPELINED);
5294 /* WaDisableRenderCachePipelinedFlush:ilk */
5295 I915_WRITE(CACHE_MODE_0,
5296 _MASKED_BIT_ENABLE(CM0_PIPELINED_RENDER_FLUSH_DISABLE));
5298 /* WaDisable_RenderCache_OperationalFlush:ilk */
5299 I915_WRITE(CACHE_MODE_0, _MASKED_BIT_DISABLE(RC_OP_FLUSH_ENABLE));
5301 g4x_disable_trickle_feed(dev);
5303 ibx_init_clock_gating(dev);
5306 static void cpt_init_clock_gating(struct drm_device *dev)
5308 struct drm_i915_private *dev_priv = dev->dev_private;
5313 * On Ibex Peak and Cougar Point, we need to disable clock
5314 * gating for the panel power sequencer or it will fail to
5315 * start up when no ports are active.
5317 I915_WRITE(SOUTH_DSPCLK_GATE_D, PCH_DPLSUNIT_CLOCK_GATE_DISABLE |
5318 PCH_DPLUNIT_CLOCK_GATE_DISABLE |
5319 PCH_CPUNIT_CLOCK_GATE_DISABLE);
5320 I915_WRITE(SOUTH_CHICKEN2, I915_READ(SOUTH_CHICKEN2) |
5321 DPLS_EDP_PPS_FIX_DIS);
5322 /* The below fixes the weird display corruption, a few pixels shifted
5323 * downward, on (only) LVDS of some HP laptops with IVY.
5325 for_each_pipe(pipe) {
5326 val = I915_READ(TRANS_CHICKEN2(pipe));
5327 val |= TRANS_CHICKEN2_TIMING_OVERRIDE;
5328 val &= ~TRANS_CHICKEN2_FDI_POLARITY_REVERSED;
5329 if (dev_priv->vbt.fdi_rx_polarity_inverted)
5330 val |= TRANS_CHICKEN2_FDI_POLARITY_REVERSED;
5331 val &= ~TRANS_CHICKEN2_FRAME_START_DELAY_MASK;
5332 val &= ~TRANS_CHICKEN2_DISABLE_DEEP_COLOR_COUNTER;
5333 val &= ~TRANS_CHICKEN2_DISABLE_DEEP_COLOR_MODESWITCH;
5334 I915_WRITE(TRANS_CHICKEN2(pipe), val);
5336 /* WADP0ClockGatingDisable */
5337 for_each_pipe(pipe) {
5338 I915_WRITE(TRANS_CHICKEN1(pipe),
5339 TRANS_CHICKEN1_DP0UNIT_GC_DISABLE);
5343 static void gen6_check_mch_setup(struct drm_device *dev)
5345 struct drm_i915_private *dev_priv = dev->dev_private;
5348 tmp = I915_READ(MCH_SSKPD);
5349 if ((tmp & MCH_SSKPD_WM0_MASK) != MCH_SSKPD_WM0_VAL)
5350 DRM_DEBUG_KMS("Wrong MCH_SSKPD value: 0x%08x This can cause underruns.\n",
5354 static void gen6_init_clock_gating(struct drm_device *dev)
5356 struct drm_i915_private *dev_priv = dev->dev_private;
5357 uint32_t dspclk_gate = ILK_VRHUNIT_CLOCK_GATE_DISABLE;
5359 I915_WRITE(ILK_DSPCLK_GATE_D, dspclk_gate);
5361 I915_WRITE(ILK_DISPLAY_CHICKEN2,
5362 I915_READ(ILK_DISPLAY_CHICKEN2) |
5363 ILK_ELPIN_409_SELECT);
5365 /* WaDisableHiZPlanesWhenMSAAEnabled:snb */
5366 I915_WRITE(_3D_CHICKEN,
5367 _MASKED_BIT_ENABLE(_3D_CHICKEN_HIZ_PLANE_DISABLE_MSAA_4X_SNB));
5369 /* WaSetupGtModeTdRowDispatch:snb */
5370 if (IS_SNB_GT1(dev))
5371 I915_WRITE(GEN6_GT_MODE,
5372 _MASKED_BIT_ENABLE(GEN6_TD_FOUR_ROW_DISPATCH_DISABLE));
5374 /* WaDisable_RenderCache_OperationalFlush:snb */
5375 I915_WRITE(CACHE_MODE_0, _MASKED_BIT_DISABLE(RC_OP_FLUSH_ENABLE));
5378 * BSpec recoomends 8x4 when MSAA is used,
5379 * however in practice 16x4 seems fastest.
5381 * Note that PS/WM thread counts depend on the WIZ hashing
5382 * disable bit, which we don't touch here, but it's good
5383 * to keep in mind (see 3DSTATE_PS and 3DSTATE_WM).
5385 I915_WRITE(GEN6_GT_MODE,
5386 GEN6_WIZ_HASHING_MASK | GEN6_WIZ_HASHING_16x4);
5388 ilk_init_lp_watermarks(dev);
5390 I915_WRITE(CACHE_MODE_0,
5391 _MASKED_BIT_DISABLE(CM0_STC_EVICT_DISABLE_LRA_SNB));
5393 I915_WRITE(GEN6_UCGCTL1,
5394 I915_READ(GEN6_UCGCTL1) |
5395 GEN6_BLBUNIT_CLOCK_GATE_DISABLE |
5396 GEN6_CSUNIT_CLOCK_GATE_DISABLE);
5398 /* According to the BSpec vol1g, bit 12 (RCPBUNIT) clock
5399 * gating disable must be set. Failure to set it results in
5400 * flickering pixels due to Z write ordering failures after
5401 * some amount of runtime in the Mesa "fire" demo, and Unigine
5402 * Sanctuary and Tropics, and apparently anything else with
5403 * alpha test or pixel discard.
5405 * According to the spec, bit 11 (RCCUNIT) must also be set,
5406 * but we didn't debug actual testcases to find it out.
5408 * WaDisableRCCUnitClockGating:snb
5409 * WaDisableRCPBUnitClockGating:snb
5411 I915_WRITE(GEN6_UCGCTL2,
5412 GEN6_RCPBUNIT_CLOCK_GATE_DISABLE |
5413 GEN6_RCCUNIT_CLOCK_GATE_DISABLE);
5415 /* WaStripsFansDisableFastClipPerformanceFix:snb */
5416 I915_WRITE(_3D_CHICKEN3,
5417 _MASKED_BIT_ENABLE(_3D_CHICKEN3_SF_DISABLE_FASTCLIP_CULL));
5421 * "This bit must be set if 3DSTATE_CLIP clip mode is set to normal and
5422 * 3DSTATE_SF number of SF output attributes is more than 16."
5424 I915_WRITE(_3D_CHICKEN3,
5425 _MASKED_BIT_ENABLE(_3D_CHICKEN3_SF_DISABLE_PIPELINED_ATTR_FETCH));
5428 * According to the spec the following bits should be
5429 * set in order to enable memory self-refresh and fbc:
5430 * The bit21 and bit22 of 0x42000
5431 * The bit21 and bit22 of 0x42004
5432 * The bit5 and bit7 of 0x42020
5433 * The bit14 of 0x70180
5434 * The bit14 of 0x71180
5436 * WaFbcAsynchFlipDisableFbcQueue:snb
5438 I915_WRITE(ILK_DISPLAY_CHICKEN1,
5439 I915_READ(ILK_DISPLAY_CHICKEN1) |
5440 ILK_FBCQ_DIS | ILK_PABSTRETCH_DIS);
5441 I915_WRITE(ILK_DISPLAY_CHICKEN2,
5442 I915_READ(ILK_DISPLAY_CHICKEN2) |
5443 ILK_DPARB_GATE | ILK_VSDPFD_FULL);
5444 I915_WRITE(ILK_DSPCLK_GATE_D,
5445 I915_READ(ILK_DSPCLK_GATE_D) |
5446 ILK_DPARBUNIT_CLOCK_GATE_ENABLE |
5447 ILK_DPFDUNIT_CLOCK_GATE_ENABLE);
5449 g4x_disable_trickle_feed(dev);
5451 cpt_init_clock_gating(dev);
5453 gen6_check_mch_setup(dev);
5456 static void gen7_setup_fixed_func_scheduler(struct drm_i915_private *dev_priv)
5458 uint32_t reg = I915_READ(GEN7_FF_THREAD_MODE);
5461 * WaVSThreadDispatchOverride:ivb,vlv
5463 * This actually overrides the dispatch
5464 * mode for all thread types.
5466 reg &= ~GEN7_FF_SCHED_MASK;
5467 reg |= GEN7_FF_TS_SCHED_HW;
5468 reg |= GEN7_FF_VS_SCHED_HW;
5469 reg |= GEN7_FF_DS_SCHED_HW;
5471 I915_WRITE(GEN7_FF_THREAD_MODE, reg);
5474 static void lpt_init_clock_gating(struct drm_device *dev)
5476 struct drm_i915_private *dev_priv = dev->dev_private;
5479 * TODO: this bit should only be enabled when really needed, then
5480 * disabled when not needed anymore in order to save power.
5482 if (dev_priv->pch_id == INTEL_PCH_LPT_LP_DEVICE_ID_TYPE)
5483 I915_WRITE(SOUTH_DSPCLK_GATE_D,
5484 I915_READ(SOUTH_DSPCLK_GATE_D) |
5485 PCH_LP_PARTITION_LEVEL_DISABLE);
5487 /* WADPOClockGatingDisable:hsw */
5488 I915_WRITE(_TRANSA_CHICKEN1,
5489 I915_READ(_TRANSA_CHICKEN1) |
5490 TRANS_CHICKEN1_DP0UNIT_GC_DISABLE);
5493 static void lpt_suspend_hw(struct drm_device *dev)
5495 struct drm_i915_private *dev_priv = dev->dev_private;
5497 if (dev_priv->pch_id == INTEL_PCH_LPT_LP_DEVICE_ID_TYPE) {
5498 uint32_t val = I915_READ(SOUTH_DSPCLK_GATE_D);
5500 val &= ~PCH_LP_PARTITION_LEVEL_DISABLE;
5501 I915_WRITE(SOUTH_DSPCLK_GATE_D, val);
5505 static void gen8_init_clock_gating(struct drm_device *dev)
5507 struct drm_i915_private *dev_priv = dev->dev_private;
5510 I915_WRITE(WM3_LP_ILK, 0);
5511 I915_WRITE(WM2_LP_ILK, 0);
5512 I915_WRITE(WM1_LP_ILK, 0);
5514 /* FIXME(BDW): Check all the w/a, some might only apply to
5515 * pre-production hw. */
5517 /* WaDisablePartialInstShootdown:bdw */
5518 I915_WRITE(GEN8_ROW_CHICKEN,
5519 _MASKED_BIT_ENABLE(PARTIAL_INSTRUCTION_SHOOTDOWN_DISABLE));
5521 /* WaDisableThreadStallDopClockGating:bdw */
5522 /* FIXME: Unclear whether we really need this on production bdw. */
5523 I915_WRITE(GEN8_ROW_CHICKEN,
5524 _MASKED_BIT_ENABLE(STALL_DOP_GATING_DISABLE));
5527 * This GEN8_CENTROID_PIXEL_OPT_DIS W/A is only needed for
5528 * pre-production hardware
5530 I915_WRITE(HALF_SLICE_CHICKEN3,
5531 _MASKED_BIT_ENABLE(GEN8_CENTROID_PIXEL_OPT_DIS));
5532 I915_WRITE(HALF_SLICE_CHICKEN3,
5533 _MASKED_BIT_ENABLE(GEN8_SAMPLER_POWER_BYPASS_DIS));
5534 I915_WRITE(GAMTARBMODE, _MASKED_BIT_ENABLE(ARB_MODE_BWGTLB_DISABLE));
5536 I915_WRITE(_3D_CHICKEN3,
5537 _MASKED_BIT_ENABLE(_3D_CHICKEN_SDE_LIMIT_FIFO_POLY_DEPTH(2)));
5539 I915_WRITE(COMMON_SLICE_CHICKEN2,
5540 _MASKED_BIT_ENABLE(GEN8_CSC2_SBE_VUE_CACHE_CONSERVATIVE));
5542 I915_WRITE(GEN7_HALF_SLICE_CHICKEN1,
5543 _MASKED_BIT_ENABLE(GEN7_SINGLE_SUBSCAN_DISPATCH_ENABLE));
5545 /* WaDisableDopClockGating:bdw May not be needed for production */
5546 I915_WRITE(GEN7_ROW_CHICKEN2,
5547 _MASKED_BIT_ENABLE(DOP_CLOCK_GATING_DISABLE));
5549 /* WaSwitchSolVfFArbitrationPriority:bdw */
5550 I915_WRITE(GAM_ECOCHK, I915_READ(GAM_ECOCHK) | HSW_ECOCHK_ARB_PRIO_SOL);
5552 /* WaPsrDPAMaskVBlankInSRD:bdw */
5553 I915_WRITE(CHICKEN_PAR1_1,
5554 I915_READ(CHICKEN_PAR1_1) | DPA_MASK_VBLANK_SRD);
5556 /* WaPsrDPRSUnmaskVBlankInSRD:bdw */
5557 for_each_pipe(pipe) {
5558 I915_WRITE(CHICKEN_PIPESL_1(pipe),
5559 I915_READ(CHICKEN_PIPESL_1(pipe)) |
5560 BDW_DPRS_MASK_VBLANK_SRD);
5563 /* Use Force Non-Coherent whenever executing a 3D context. This is a
5564 * workaround for for a possible hang in the unlikely event a TLB
5565 * invalidation occurs during a PSD flush.
5567 I915_WRITE(HDC_CHICKEN0,
5568 I915_READ(HDC_CHICKEN0) |
5569 _MASKED_BIT_ENABLE(HDC_FORCE_NON_COHERENT));
5571 /* WaVSRefCountFullforceMissDisable:bdw */
5572 /* WaDSRefCountFullforceMissDisable:bdw */
5573 I915_WRITE(GEN7_FF_THREAD_MODE,
5574 I915_READ(GEN7_FF_THREAD_MODE) &
5575 ~(GEN8_FF_DS_REF_CNT_FFME | GEN7_FF_VS_REF_CNT_FFME));
5578 * BSpec recommends 8x4 when MSAA is used,
5579 * however in practice 16x4 seems fastest.
5581 * Note that PS/WM thread counts depend on the WIZ hashing
5582 * disable bit, which we don't touch here, but it's good
5583 * to keep in mind (see 3DSTATE_PS and 3DSTATE_WM).
5585 I915_WRITE(GEN7_GT_MODE,
5586 GEN6_WIZ_HASHING_MASK | GEN6_WIZ_HASHING_16x4);
5588 I915_WRITE(GEN6_RC_SLEEP_PSMI_CONTROL,
5589 _MASKED_BIT_ENABLE(GEN8_RC_SEMA_IDLE_MSG_DISABLE));
5591 /* WaDisableSDEUnitClockGating:bdw */
5592 I915_WRITE(GEN8_UCGCTL6, I915_READ(GEN8_UCGCTL6) |
5593 GEN8_SDEUNIT_CLOCK_GATE_DISABLE);
5595 /* Wa4x4STCOptimizationDisable:bdw */
5596 I915_WRITE(CACHE_MODE_1,
5597 _MASKED_BIT_ENABLE(GEN8_4x4_STC_OPTIMIZATION_DISABLE));
5600 static void haswell_init_clock_gating(struct drm_device *dev)
5602 struct drm_i915_private *dev_priv = dev->dev_private;
5604 ilk_init_lp_watermarks(dev);
5606 /* L3 caching of data atomics doesn't work -- disable it. */
5607 I915_WRITE(HSW_SCRATCH1, HSW_SCRATCH1_L3_DATA_ATOMICS_DISABLE);
5608 I915_WRITE(HSW_ROW_CHICKEN3,
5609 _MASKED_BIT_ENABLE(HSW_ROW_CHICKEN3_L3_GLOBAL_ATOMICS_DISABLE));
5611 /* This is required by WaCatErrorRejectionIssue:hsw */
5612 I915_WRITE(GEN7_SQ_CHICKEN_MBCUNIT_CONFIG,
5613 I915_READ(GEN7_SQ_CHICKEN_MBCUNIT_CONFIG) |
5614 GEN7_SQ_CHICKEN_MBCUNIT_SQINTMOB);
5616 /* WaVSRefCountFullforceMissDisable:hsw */
5617 I915_WRITE(GEN7_FF_THREAD_MODE,
5618 I915_READ(GEN7_FF_THREAD_MODE) & ~GEN7_FF_VS_REF_CNT_FFME);
5620 /* WaDisable_RenderCache_OperationalFlush:hsw */
5621 I915_WRITE(CACHE_MODE_0_GEN7, _MASKED_BIT_DISABLE(RC_OP_FLUSH_ENABLE));
5623 /* enable HiZ Raw Stall Optimization */
5624 I915_WRITE(CACHE_MODE_0_GEN7,
5625 _MASKED_BIT_DISABLE(HIZ_RAW_STALL_OPT_DISABLE));
5627 /* WaDisable4x2SubspanOptimization:hsw */
5628 I915_WRITE(CACHE_MODE_1,
5629 _MASKED_BIT_ENABLE(PIXEL_SUBSPAN_COLLECT_OPT_DISABLE));
5632 * BSpec recommends 8x4 when MSAA is used,
5633 * however in practice 16x4 seems fastest.
5635 * Note that PS/WM thread counts depend on the WIZ hashing
5636 * disable bit, which we don't touch here, but it's good
5637 * to keep in mind (see 3DSTATE_PS and 3DSTATE_WM).
5639 I915_WRITE(GEN7_GT_MODE,
5640 GEN6_WIZ_HASHING_MASK | GEN6_WIZ_HASHING_16x4);
5642 /* WaSwitchSolVfFArbitrationPriority:hsw */
5643 I915_WRITE(GAM_ECOCHK, I915_READ(GAM_ECOCHK) | HSW_ECOCHK_ARB_PRIO_SOL);
5645 /* WaRsPkgCStateDisplayPMReq:hsw */
5646 I915_WRITE(CHICKEN_PAR1_1,
5647 I915_READ(CHICKEN_PAR1_1) | FORCE_ARB_IDLE_PLANES);
5649 lpt_init_clock_gating(dev);
5652 static void ivybridge_init_clock_gating(struct drm_device *dev)
5654 struct drm_i915_private *dev_priv = dev->dev_private;
5657 ilk_init_lp_watermarks(dev);
5659 I915_WRITE(ILK_DSPCLK_GATE_D, ILK_VRHUNIT_CLOCK_GATE_DISABLE);
5661 /* WaDisableEarlyCull:ivb */
5662 I915_WRITE(_3D_CHICKEN3,
5663 _MASKED_BIT_ENABLE(_3D_CHICKEN_SF_DISABLE_OBJEND_CULL));
5665 /* WaDisableBackToBackFlipFix:ivb */
5666 I915_WRITE(IVB_CHICKEN3,
5667 CHICKEN3_DGMG_REQ_OUT_FIX_DISABLE |
5668 CHICKEN3_DGMG_DONE_FIX_DISABLE);
5670 /* WaDisablePSDDualDispatchEnable:ivb */
5671 if (IS_IVB_GT1(dev))
5672 I915_WRITE(GEN7_HALF_SLICE_CHICKEN1,
5673 _MASKED_BIT_ENABLE(GEN7_PSD_SINGLE_PORT_DISPATCH_ENABLE));
5675 /* WaDisable_RenderCache_OperationalFlush:ivb */
5676 I915_WRITE(CACHE_MODE_0_GEN7, _MASKED_BIT_DISABLE(RC_OP_FLUSH_ENABLE));
5678 /* Apply the WaDisableRHWOOptimizationForRenderHang:ivb workaround. */
5679 I915_WRITE(GEN7_COMMON_SLICE_CHICKEN1,
5680 GEN7_CSC1_RHWO_OPT_DISABLE_IN_RCC);
5682 /* WaApplyL3ControlAndL3ChickenMode:ivb */
5683 I915_WRITE(GEN7_L3CNTLREG1,
5684 GEN7_WA_FOR_GEN7_L3_CONTROL);
5685 I915_WRITE(GEN7_L3_CHICKEN_MODE_REGISTER,
5686 GEN7_WA_L3_CHICKEN_MODE);
5687 if (IS_IVB_GT1(dev))
5688 I915_WRITE(GEN7_ROW_CHICKEN2,
5689 _MASKED_BIT_ENABLE(DOP_CLOCK_GATING_DISABLE));
5691 /* must write both registers */
5692 I915_WRITE(GEN7_ROW_CHICKEN2,
5693 _MASKED_BIT_ENABLE(DOP_CLOCK_GATING_DISABLE));
5694 I915_WRITE(GEN7_ROW_CHICKEN2_GT2,
5695 _MASKED_BIT_ENABLE(DOP_CLOCK_GATING_DISABLE));
5698 /* WaForceL3Serialization:ivb */
5699 I915_WRITE(GEN7_L3SQCREG4, I915_READ(GEN7_L3SQCREG4) &
5700 ~L3SQ_URB_READ_CAM_MATCH_DISABLE);
5703 * According to the spec, bit 13 (RCZUNIT) must be set on IVB.
5704 * This implements the WaDisableRCZUnitClockGating:ivb workaround.
5706 I915_WRITE(GEN6_UCGCTL2,
5707 GEN6_RCZUNIT_CLOCK_GATE_DISABLE);
5709 /* This is required by WaCatErrorRejectionIssue:ivb */
5710 I915_WRITE(GEN7_SQ_CHICKEN_MBCUNIT_CONFIG,
5711 I915_READ(GEN7_SQ_CHICKEN_MBCUNIT_CONFIG) |
5712 GEN7_SQ_CHICKEN_MBCUNIT_SQINTMOB);
5714 g4x_disable_trickle_feed(dev);
5716 gen7_setup_fixed_func_scheduler(dev_priv);
5718 if (0) { /* causes HiZ corruption on ivb:gt1 */
5719 /* enable HiZ Raw Stall Optimization */
5720 I915_WRITE(CACHE_MODE_0_GEN7,
5721 _MASKED_BIT_DISABLE(HIZ_RAW_STALL_OPT_DISABLE));
5724 /* WaDisable4x2SubspanOptimization:ivb */
5725 I915_WRITE(CACHE_MODE_1,
5726 _MASKED_BIT_ENABLE(PIXEL_SUBSPAN_COLLECT_OPT_DISABLE));
5729 * BSpec recommends 8x4 when MSAA is used,
5730 * however in practice 16x4 seems fastest.
5732 * Note that PS/WM thread counts depend on the WIZ hashing
5733 * disable bit, which we don't touch here, but it's good
5734 * to keep in mind (see 3DSTATE_PS and 3DSTATE_WM).
5736 I915_WRITE(GEN7_GT_MODE,
5737 GEN6_WIZ_HASHING_MASK | GEN6_WIZ_HASHING_16x4);
5739 snpcr = I915_READ(GEN6_MBCUNIT_SNPCR);
5740 snpcr &= ~GEN6_MBC_SNPCR_MASK;
5741 snpcr |= GEN6_MBC_SNPCR_MED;
5742 I915_WRITE(GEN6_MBCUNIT_SNPCR, snpcr);
5744 if (!HAS_PCH_NOP(dev))
5745 cpt_init_clock_gating(dev);
5747 gen6_check_mch_setup(dev);
5750 static void valleyview_init_clock_gating(struct drm_device *dev)
5752 struct drm_i915_private *dev_priv = dev->dev_private;
5755 mutex_lock(&dev_priv->rps.hw_lock);
5756 val = vlv_punit_read(dev_priv, PUNIT_REG_GPU_FREQ_STS);
5757 mutex_unlock(&dev_priv->rps.hw_lock);
5758 switch ((val >> 6) & 3) {
5761 dev_priv->mem_freq = 800;
5764 dev_priv->mem_freq = 1066;
5767 dev_priv->mem_freq = 1333;
5770 DRM_DEBUG_DRIVER("DDR speed: %d MHz", dev_priv->mem_freq);
5772 I915_WRITE(DSPCLK_GATE_D, VRHUNIT_CLOCK_GATE_DISABLE);
5774 /* WaDisableEarlyCull:vlv */
5775 I915_WRITE(_3D_CHICKEN3,
5776 _MASKED_BIT_ENABLE(_3D_CHICKEN_SF_DISABLE_OBJEND_CULL));
5778 /* WaDisableBackToBackFlipFix:vlv */
5779 I915_WRITE(IVB_CHICKEN3,
5780 CHICKEN3_DGMG_REQ_OUT_FIX_DISABLE |
5781 CHICKEN3_DGMG_DONE_FIX_DISABLE);
5783 /* WaPsdDispatchEnable:vlv */
5784 /* WaDisablePSDDualDispatchEnable:vlv */
5785 I915_WRITE(GEN7_HALF_SLICE_CHICKEN1,
5786 _MASKED_BIT_ENABLE(GEN7_MAX_PS_THREAD_DEP |
5787 GEN7_PSD_SINGLE_PORT_DISPATCH_ENABLE));
5789 /* WaDisable_RenderCache_OperationalFlush:vlv */
5790 I915_WRITE(CACHE_MODE_0_GEN7, _MASKED_BIT_DISABLE(RC_OP_FLUSH_ENABLE));
5792 /* WaForceL3Serialization:vlv */
5793 I915_WRITE(GEN7_L3SQCREG4, I915_READ(GEN7_L3SQCREG4) &
5794 ~L3SQ_URB_READ_CAM_MATCH_DISABLE);
5796 /* WaDisableDopClockGating:vlv */
5797 I915_WRITE(GEN7_ROW_CHICKEN2,
5798 _MASKED_BIT_ENABLE(DOP_CLOCK_GATING_DISABLE));
5800 /* This is required by WaCatErrorRejectionIssue:vlv */
5801 I915_WRITE(GEN7_SQ_CHICKEN_MBCUNIT_CONFIG,
5802 I915_READ(GEN7_SQ_CHICKEN_MBCUNIT_CONFIG) |
5803 GEN7_SQ_CHICKEN_MBCUNIT_SQINTMOB);
5805 gen7_setup_fixed_func_scheduler(dev_priv);
5808 * According to the spec, bit 13 (RCZUNIT) must be set on IVB.
5809 * This implements the WaDisableRCZUnitClockGating:vlv workaround.
5811 I915_WRITE(GEN6_UCGCTL2,
5812 GEN6_RCZUNIT_CLOCK_GATE_DISABLE);
5814 /* WaDisableL3Bank2xClockGate:vlv
5815 * Disabling L3 clock gating- MMIO 940c[25] = 1
5816 * Set bit 25, to disable L3_BANK_2x_CLK_GATING */
5817 I915_WRITE(GEN7_UCGCTL4,
5818 I915_READ(GEN7_UCGCTL4) | GEN7_L3BANK2X_CLOCK_GATE_DISABLE);
5820 I915_WRITE(MI_ARB_VLV, MI_ARB_DISPLAY_TRICKLE_FEED_DISABLE);
5823 * BSpec says this must be set, even though
5824 * WaDisable4x2SubspanOptimization isn't listed for VLV.
5826 I915_WRITE(CACHE_MODE_1,
5827 _MASKED_BIT_ENABLE(PIXEL_SUBSPAN_COLLECT_OPT_DISABLE));
5830 * WaIncreaseL3CreditsForVLVB0:vlv
5831 * This is the hardware default actually.
5833 I915_WRITE(GEN7_L3SQCREG1, VLV_B0_WA_L3SQCREG1_VALUE);
5836 * WaDisableVLVClockGating_VBIIssue:vlv
5837 * Disable clock gating on th GCFG unit to prevent a delay
5838 * in the reporting of vblank events.
5840 I915_WRITE(VLV_GUNIT_CLOCK_GATE, GCFG_DIS);
5843 static void cherryview_init_clock_gating(struct drm_device *dev)
5845 struct drm_i915_private *dev_priv = dev->dev_private;
5848 mutex_lock(&dev_priv->rps.hw_lock);
5849 val = vlv_punit_read(dev_priv, CCK_FUSE_REG);
5850 mutex_unlock(&dev_priv->rps.hw_lock);
5851 switch ((val >> 2) & 0x7) {
5854 dev_priv->rps.cz_freq = CHV_CZ_CLOCK_FREQ_MODE_200;
5855 dev_priv->mem_freq = 1600;
5858 dev_priv->rps.cz_freq = CHV_CZ_CLOCK_FREQ_MODE_267;
5859 dev_priv->mem_freq = 1600;
5862 dev_priv->rps.cz_freq = CHV_CZ_CLOCK_FREQ_MODE_333;
5863 dev_priv->mem_freq = 2000;
5866 dev_priv->rps.cz_freq = CHV_CZ_CLOCK_FREQ_MODE_320;
5867 dev_priv->mem_freq = 1600;
5870 dev_priv->rps.cz_freq = CHV_CZ_CLOCK_FREQ_MODE_400;
5871 dev_priv->mem_freq = 1600;
5874 DRM_DEBUG_DRIVER("DDR speed: %d MHz", dev_priv->mem_freq);
5876 I915_WRITE(DSPCLK_GATE_D, VRHUNIT_CLOCK_GATE_DISABLE);
5878 I915_WRITE(MI_ARB_VLV, MI_ARB_DISPLAY_TRICKLE_FEED_DISABLE);
5880 /* WaDisablePartialInstShootdown:chv */
5881 I915_WRITE(GEN8_ROW_CHICKEN,
5882 _MASKED_BIT_ENABLE(PARTIAL_INSTRUCTION_SHOOTDOWN_DISABLE));
5884 /* WaDisableThreadStallDopClockGating:chv */
5885 I915_WRITE(GEN8_ROW_CHICKEN,
5886 _MASKED_BIT_ENABLE(STALL_DOP_GATING_DISABLE));
5888 /* WaVSRefCountFullforceMissDisable:chv */
5889 /* WaDSRefCountFullforceMissDisable:chv */
5890 I915_WRITE(GEN7_FF_THREAD_MODE,
5891 I915_READ(GEN7_FF_THREAD_MODE) &
5892 ~(GEN8_FF_DS_REF_CNT_FFME | GEN7_FF_VS_REF_CNT_FFME));
5894 /* WaDisableSemaphoreAndSyncFlipWait:chv */
5895 I915_WRITE(GEN6_RC_SLEEP_PSMI_CONTROL,
5896 _MASKED_BIT_ENABLE(GEN8_RC_SEMA_IDLE_MSG_DISABLE));
5898 /* WaDisableCSUnitClockGating:chv */
5899 I915_WRITE(GEN6_UCGCTL1, I915_READ(GEN6_UCGCTL1) |
5900 GEN6_CSUNIT_CLOCK_GATE_DISABLE);
5902 /* WaDisableSDEUnitClockGating:chv */
5903 I915_WRITE(GEN8_UCGCTL6, I915_READ(GEN8_UCGCTL6) |
5904 GEN8_SDEUNIT_CLOCK_GATE_DISABLE);
5906 /* WaDisableSamplerPowerBypass:chv (pre-production hw) */
5907 I915_WRITE(HALF_SLICE_CHICKEN3,
5908 _MASKED_BIT_ENABLE(GEN8_SAMPLER_POWER_BYPASS_DIS));
5910 /* WaDisableGunitClockGating:chv (pre-production hw) */
5911 I915_WRITE(VLV_GUNIT_CLOCK_GATE, I915_READ(VLV_GUNIT_CLOCK_GATE) |
5914 /* WaDisableFfDopClockGating:chv (pre-production hw) */
5915 I915_WRITE(GEN6_RC_SLEEP_PSMI_CONTROL,
5916 _MASKED_BIT_ENABLE(GEN8_FF_DOP_CLOCK_GATE_DISABLE));
5918 /* WaDisableDopClockGating:chv (pre-production hw) */
5919 I915_WRITE(GEN7_ROW_CHICKEN2,
5920 _MASKED_BIT_ENABLE(DOP_CLOCK_GATING_DISABLE));
5921 I915_WRITE(GEN6_UCGCTL1, I915_READ(GEN6_UCGCTL1) |
5922 GEN6_EU_TCUNIT_CLOCK_GATE_DISABLE);
5925 static void g4x_init_clock_gating(struct drm_device *dev)
5927 struct drm_i915_private *dev_priv = dev->dev_private;
5928 uint32_t dspclk_gate;
5930 I915_WRITE(RENCLK_GATE_D1, 0);
5931 I915_WRITE(RENCLK_GATE_D2, VF_UNIT_CLOCK_GATE_DISABLE |
5932 GS_UNIT_CLOCK_GATE_DISABLE |
5933 CL_UNIT_CLOCK_GATE_DISABLE);
5934 I915_WRITE(RAMCLK_GATE_D, 0);
5935 dspclk_gate = VRHUNIT_CLOCK_GATE_DISABLE |
5936 OVRUNIT_CLOCK_GATE_DISABLE |
5937 OVCUNIT_CLOCK_GATE_DISABLE;
5939 dspclk_gate |= DSSUNIT_CLOCK_GATE_DISABLE;
5940 I915_WRITE(DSPCLK_GATE_D, dspclk_gate);
5942 /* WaDisableRenderCachePipelinedFlush */
5943 I915_WRITE(CACHE_MODE_0,
5944 _MASKED_BIT_ENABLE(CM0_PIPELINED_RENDER_FLUSH_DISABLE));
5946 /* WaDisable_RenderCache_OperationalFlush:g4x */
5947 I915_WRITE(CACHE_MODE_0, _MASKED_BIT_DISABLE(RC_OP_FLUSH_ENABLE));
5949 g4x_disable_trickle_feed(dev);
5952 static void crestline_init_clock_gating(struct drm_device *dev)
5954 struct drm_i915_private *dev_priv = dev->dev_private;
5956 I915_WRITE(RENCLK_GATE_D1, I965_RCC_CLOCK_GATE_DISABLE);
5957 I915_WRITE(RENCLK_GATE_D2, 0);
5958 I915_WRITE(DSPCLK_GATE_D, 0);
5959 I915_WRITE(RAMCLK_GATE_D, 0);
5960 I915_WRITE16(DEUC, 0);
5961 I915_WRITE(MI_ARB_STATE,
5962 _MASKED_BIT_ENABLE(MI_ARB_DISPLAY_TRICKLE_FEED_DISABLE));
5964 /* WaDisable_RenderCache_OperationalFlush:gen4 */
5965 I915_WRITE(CACHE_MODE_0, _MASKED_BIT_DISABLE(RC_OP_FLUSH_ENABLE));
5968 static void broadwater_init_clock_gating(struct drm_device *dev)
5970 struct drm_i915_private *dev_priv = dev->dev_private;
5972 I915_WRITE(RENCLK_GATE_D1, I965_RCZ_CLOCK_GATE_DISABLE |
5973 I965_RCC_CLOCK_GATE_DISABLE |
5974 I965_RCPB_CLOCK_GATE_DISABLE |
5975 I965_ISC_CLOCK_GATE_DISABLE |
5976 I965_FBC_CLOCK_GATE_DISABLE);
5977 I915_WRITE(RENCLK_GATE_D2, 0);
5978 I915_WRITE(MI_ARB_STATE,
5979 _MASKED_BIT_ENABLE(MI_ARB_DISPLAY_TRICKLE_FEED_DISABLE));
5981 /* WaDisable_RenderCache_OperationalFlush:gen4 */
5982 I915_WRITE(CACHE_MODE_0, _MASKED_BIT_DISABLE(RC_OP_FLUSH_ENABLE));
5985 static void gen3_init_clock_gating(struct drm_device *dev)
5987 struct drm_i915_private *dev_priv = dev->dev_private;
5988 u32 dstate = I915_READ(D_STATE);
5990 dstate |= DSTATE_PLL_D3_OFF | DSTATE_GFX_CLOCK_GATING |
5991 DSTATE_DOT_CLOCK_GATING;
5992 I915_WRITE(D_STATE, dstate);
5994 if (IS_PINEVIEW(dev))
5995 I915_WRITE(ECOSKPD, _MASKED_BIT_ENABLE(ECO_GATING_CX_ONLY));
5997 /* IIR "flip pending" means done if this bit is set */
5998 I915_WRITE(ECOSKPD, _MASKED_BIT_DISABLE(ECO_FLIP_DONE));
6000 /* interrupts should cause a wake up from C3 */
6001 I915_WRITE(INSTPM, _MASKED_BIT_ENABLE(INSTPM_AGPBUSY_INT_EN));
6003 /* On GEN3 we really need to make sure the ARB C3 LP bit is set */
6004 I915_WRITE(MI_ARB_STATE, _MASKED_BIT_ENABLE(MI_ARB_C3_LP_WRITE_ENABLE));
6007 static void i85x_init_clock_gating(struct drm_device *dev)
6009 struct drm_i915_private *dev_priv = dev->dev_private;
6011 I915_WRITE(RENCLK_GATE_D1, SV_CLOCK_GATE_DISABLE);
6013 /* interrupts should cause a wake up from C3 */
6014 I915_WRITE(MI_STATE, _MASKED_BIT_ENABLE(MI_AGPBUSY_INT_EN) |
6015 _MASKED_BIT_DISABLE(MI_AGPBUSY_830_MODE));
6018 static void i830_init_clock_gating(struct drm_device *dev)
6020 struct drm_i915_private *dev_priv = dev->dev_private;
6022 I915_WRITE(DSPCLK_GATE_D, OVRUNIT_CLOCK_GATE_DISABLE);
6025 void intel_init_clock_gating(struct drm_device *dev)
6027 struct drm_i915_private *dev_priv = dev->dev_private;
6029 dev_priv->display.init_clock_gating(dev);
6032 void intel_suspend_hw(struct drm_device *dev)
6034 if (HAS_PCH_LPT(dev))
6035 lpt_suspend_hw(dev);
6038 #define for_each_power_well(i, power_well, domain_mask, power_domains) \
6040 i < (power_domains)->power_well_count && \
6041 ((power_well) = &(power_domains)->power_wells[i]); \
6043 if ((power_well)->domains & (domain_mask))
6045 #define for_each_power_well_rev(i, power_well, domain_mask, power_domains) \
6046 for (i = (power_domains)->power_well_count - 1; \
6047 i >= 0 && ((power_well) = &(power_domains)->power_wells[i]);\
6049 if ((power_well)->domains & (domain_mask))
6052 * We should only use the power well if we explicitly asked the hardware to
6053 * enable it, so check if it's enabled and also check if we've requested it to
6056 static bool hsw_power_well_enabled(struct drm_i915_private *dev_priv,
6057 struct i915_power_well *power_well)
6059 return I915_READ(HSW_PWR_WELL_DRIVER) ==
6060 (HSW_PWR_WELL_ENABLE_REQUEST | HSW_PWR_WELL_STATE_ENABLED);
6063 bool intel_display_power_enabled_unlocked(struct drm_i915_private *dev_priv,
6064 enum intel_display_power_domain domain)
6066 struct i915_power_domains *power_domains;
6067 struct i915_power_well *power_well;
6071 if (dev_priv->pm.suspended)
6074 power_domains = &dev_priv->power_domains;
6078 for_each_power_well_rev(i, power_well, BIT(domain), power_domains) {
6079 if (power_well->always_on)
6082 if (!power_well->hw_enabled) {
6091 bool intel_display_power_enabled(struct drm_i915_private *dev_priv,
6092 enum intel_display_power_domain domain)
6094 struct i915_power_domains *power_domains;
6097 power_domains = &dev_priv->power_domains;
6099 mutex_lock(&power_domains->lock);
6100 ret = intel_display_power_enabled_unlocked(dev_priv, domain);
6101 mutex_unlock(&power_domains->lock);
6107 * Starting with Haswell, we have a "Power Down Well" that can be turned off
6108 * when not needed anymore. We have 4 registers that can request the power well
6109 * to be enabled, and it will only be disabled if none of the registers is
6110 * requesting it to be enabled.
6112 static void hsw_power_well_post_enable(struct drm_i915_private *dev_priv)
6114 struct drm_device *dev = dev_priv->dev;
6117 * After we re-enable the power well, if we touch VGA register 0x3d5
6118 * we'll get unclaimed register interrupts. This stops after we write
6119 * anything to the VGA MSR register. The vgacon module uses this
6120 * register all the time, so if we unbind our driver and, as a
6121 * consequence, bind vgacon, we'll get stuck in an infinite loop at
6122 * console_unlock(). So make here we touch the VGA MSR register, making
6123 * sure vgacon can keep working normally without triggering interrupts
6124 * and error messages.
6126 vga_get_uninterruptible(dev->pdev, VGA_RSRC_LEGACY_IO);
6127 outb(inb(VGA_MSR_READ), VGA_MSR_WRITE);
6128 vga_put(dev->pdev, VGA_RSRC_LEGACY_IO);
6130 if (IS_BROADWELL(dev))
6131 gen8_irq_power_well_post_enable(dev_priv);
6134 static void hsw_set_power_well(struct drm_i915_private *dev_priv,
6135 struct i915_power_well *power_well, bool enable)
6137 bool is_enabled, enable_requested;
6140 tmp = I915_READ(HSW_PWR_WELL_DRIVER);
6141 is_enabled = tmp & HSW_PWR_WELL_STATE_ENABLED;
6142 enable_requested = tmp & HSW_PWR_WELL_ENABLE_REQUEST;
6145 if (!enable_requested)
6146 I915_WRITE(HSW_PWR_WELL_DRIVER,
6147 HSW_PWR_WELL_ENABLE_REQUEST);
6150 DRM_DEBUG_KMS("Enabling power well\n");
6151 if (wait_for((I915_READ(HSW_PWR_WELL_DRIVER) &
6152 HSW_PWR_WELL_STATE_ENABLED), 20))
6153 DRM_ERROR("Timeout enabling power well\n");
6156 hsw_power_well_post_enable(dev_priv);
6158 if (enable_requested) {
6159 I915_WRITE(HSW_PWR_WELL_DRIVER, 0);
6160 POSTING_READ(HSW_PWR_WELL_DRIVER);
6161 DRM_DEBUG_KMS("Requesting to disable the power well\n");
6166 static void hsw_power_well_sync_hw(struct drm_i915_private *dev_priv,
6167 struct i915_power_well *power_well)
6169 hsw_set_power_well(dev_priv, power_well, power_well->count > 0);
6172 * We're taking over the BIOS, so clear any requests made by it since
6173 * the driver is in charge now.
6175 if (I915_READ(HSW_PWR_WELL_BIOS) & HSW_PWR_WELL_ENABLE_REQUEST)
6176 I915_WRITE(HSW_PWR_WELL_BIOS, 0);
6179 static void hsw_power_well_enable(struct drm_i915_private *dev_priv,
6180 struct i915_power_well *power_well)
6182 hsw_set_power_well(dev_priv, power_well, true);
6185 static void hsw_power_well_disable(struct drm_i915_private *dev_priv,
6186 struct i915_power_well *power_well)
6188 hsw_set_power_well(dev_priv, power_well, false);
6191 static void i9xx_always_on_power_well_noop(struct drm_i915_private *dev_priv,
6192 struct i915_power_well *power_well)
6196 static bool i9xx_always_on_power_well_enabled(struct drm_i915_private *dev_priv,
6197 struct i915_power_well *power_well)
6202 static void vlv_set_power_well(struct drm_i915_private *dev_priv,
6203 struct i915_power_well *power_well, bool enable)
6205 enum punit_power_well power_well_id = power_well->data;
6210 mask = PUNIT_PWRGT_MASK(power_well_id);
6211 state = enable ? PUNIT_PWRGT_PWR_ON(power_well_id) :
6212 PUNIT_PWRGT_PWR_GATE(power_well_id);
6214 mutex_lock(&dev_priv->rps.hw_lock);
6217 ((vlv_punit_read(dev_priv, PUNIT_REG_PWRGT_STATUS) & mask) == state)
6222 ctrl = vlv_punit_read(dev_priv, PUNIT_REG_PWRGT_CTRL);
6225 vlv_punit_write(dev_priv, PUNIT_REG_PWRGT_CTRL, ctrl);
6227 if (wait_for(COND, 100))
6228 DRM_ERROR("timout setting power well state %08x (%08x)\n",
6230 vlv_punit_read(dev_priv, PUNIT_REG_PWRGT_CTRL));
6235 mutex_unlock(&dev_priv->rps.hw_lock);
6238 static void vlv_power_well_sync_hw(struct drm_i915_private *dev_priv,
6239 struct i915_power_well *power_well)
6241 vlv_set_power_well(dev_priv, power_well, power_well->count > 0);
6244 static void vlv_power_well_enable(struct drm_i915_private *dev_priv,
6245 struct i915_power_well *power_well)
6247 vlv_set_power_well(dev_priv, power_well, true);
6250 static void vlv_power_well_disable(struct drm_i915_private *dev_priv,
6251 struct i915_power_well *power_well)
6253 vlv_set_power_well(dev_priv, power_well, false);
6256 static bool vlv_power_well_enabled(struct drm_i915_private *dev_priv,
6257 struct i915_power_well *power_well)
6259 int power_well_id = power_well->data;
6260 bool enabled = false;
6265 mask = PUNIT_PWRGT_MASK(power_well_id);
6266 ctrl = PUNIT_PWRGT_PWR_ON(power_well_id);
6268 mutex_lock(&dev_priv->rps.hw_lock);
6270 state = vlv_punit_read(dev_priv, PUNIT_REG_PWRGT_STATUS) & mask;
6272 * We only ever set the power-on and power-gate states, anything
6273 * else is unexpected.
6275 WARN_ON(state != PUNIT_PWRGT_PWR_ON(power_well_id) &&
6276 state != PUNIT_PWRGT_PWR_GATE(power_well_id));
6281 * A transient state at this point would mean some unexpected party
6282 * is poking at the power controls too.
6284 ctrl = vlv_punit_read(dev_priv, PUNIT_REG_PWRGT_CTRL) & mask;
6285 WARN_ON(ctrl != state);
6287 mutex_unlock(&dev_priv->rps.hw_lock);
6292 static void vlv_display_power_well_enable(struct drm_i915_private *dev_priv,
6293 struct i915_power_well *power_well)
6295 WARN_ON_ONCE(power_well->data != PUNIT_POWER_WELL_DISP2D);
6297 vlv_set_power_well(dev_priv, power_well, true);
6299 spin_lock_irq(&dev_priv->irq_lock);
6300 valleyview_enable_display_irqs(dev_priv);
6301 spin_unlock_irq(&dev_priv->irq_lock);
6304 * During driver initialization/resume we can avoid restoring the
6305 * part of the HW/SW state that will be inited anyway explicitly.
6307 if (dev_priv->power_domains.initializing)
6310 intel_hpd_init(dev_priv->dev);
6312 i915_redisable_vga_power_on(dev_priv->dev);
6315 static void vlv_display_power_well_disable(struct drm_i915_private *dev_priv,
6316 struct i915_power_well *power_well)
6318 WARN_ON_ONCE(power_well->data != PUNIT_POWER_WELL_DISP2D);
6320 spin_lock_irq(&dev_priv->irq_lock);
6321 valleyview_disable_display_irqs(dev_priv);
6322 spin_unlock_irq(&dev_priv->irq_lock);
6324 vlv_set_power_well(dev_priv, power_well, false);
6327 static void vlv_dpio_cmn_power_well_enable(struct drm_i915_private *dev_priv,
6328 struct i915_power_well *power_well)
6330 WARN_ON_ONCE(power_well->data != PUNIT_POWER_WELL_DPIO_CMN_BC);
6333 * Enable the CRI clock source so we can get at the
6334 * display and the reference clock for VGA
6335 * hotplug / manual detection.
6337 I915_WRITE(DPLL(PIPE_B), I915_READ(DPLL(PIPE_B)) |
6338 DPLL_REFA_CLK_ENABLE_VLV | DPLL_INTEGRATED_CRI_CLK_VLV);
6339 udelay(1); /* >10ns for cmnreset, >0ns for sidereset */
6341 vlv_set_power_well(dev_priv, power_well, true);
6344 * From VLV2A0_DP_eDP_DPIO_driver_vbios_notes_10.docx -
6345 * 6. De-assert cmn_reset/side_reset. Same as VLV X0.
6346 * a. GUnit 0x2110 bit[0] set to 1 (def 0)
6347 * b. The other bits such as sfr settings / modesel may all
6350 * This should only be done on init and resume from S3 with
6351 * both PLLs disabled, or we risk losing DPIO and PLL
6354 I915_WRITE(DPIO_CTL, I915_READ(DPIO_CTL) | DPIO_CMNRST);
6357 static void vlv_dpio_cmn_power_well_disable(struct drm_i915_private *dev_priv,
6358 struct i915_power_well *power_well)
6360 struct drm_device *dev = dev_priv->dev;
6363 WARN_ON_ONCE(power_well->data != PUNIT_POWER_WELL_DPIO_CMN_BC);
6366 assert_pll_disabled(dev_priv, pipe);
6368 /* Assert common reset */
6369 I915_WRITE(DPIO_CTL, I915_READ(DPIO_CTL) & ~DPIO_CMNRST);
6371 vlv_set_power_well(dev_priv, power_well, false);
6374 static void chv_dpio_cmn_power_well_enable(struct drm_i915_private *dev_priv,
6375 struct i915_power_well *power_well)
6379 WARN_ON_ONCE(power_well->data != PUNIT_POWER_WELL_DPIO_CMN_BC &&
6380 power_well->data != PUNIT_POWER_WELL_DPIO_CMN_D);
6383 * Enable the CRI clock source so we can get at the
6384 * display and the reference clock for VGA
6385 * hotplug / manual detection.
6387 if (power_well->data == PUNIT_POWER_WELL_DPIO_CMN_BC) {
6389 I915_WRITE(DPLL(PIPE_B), I915_READ(DPLL(PIPE_B)) |
6390 DPLL_REFA_CLK_ENABLE_VLV);
6391 I915_WRITE(DPLL(PIPE_B), I915_READ(DPLL(PIPE_B)) |
6392 DPLL_REFA_CLK_ENABLE_VLV | DPLL_INTEGRATED_CRI_CLK_VLV);
6395 I915_WRITE(DPLL(PIPE_C), I915_READ(DPLL(PIPE_C)) |
6396 DPLL_REFA_CLK_ENABLE_VLV | DPLL_INTEGRATED_CRI_CLK_VLV);
6398 udelay(1); /* >10ns for cmnreset, >0ns for sidereset */
6399 vlv_set_power_well(dev_priv, power_well, true);
6401 /* Poll for phypwrgood signal */
6402 if (wait_for(I915_READ(DISPLAY_PHY_STATUS) & PHY_POWERGOOD(phy), 1))
6403 DRM_ERROR("Display PHY %d is not power up\n", phy);
6405 I915_WRITE(DISPLAY_PHY_CONTROL, I915_READ(DISPLAY_PHY_CONTROL) |
6406 PHY_COM_LANE_RESET_DEASSERT(phy));
6409 static void chv_dpio_cmn_power_well_disable(struct drm_i915_private *dev_priv,
6410 struct i915_power_well *power_well)
6414 WARN_ON_ONCE(power_well->data != PUNIT_POWER_WELL_DPIO_CMN_BC &&
6415 power_well->data != PUNIT_POWER_WELL_DPIO_CMN_D);
6417 if (power_well->data == PUNIT_POWER_WELL_DPIO_CMN_BC) {
6419 assert_pll_disabled(dev_priv, PIPE_A);
6420 assert_pll_disabled(dev_priv, PIPE_B);
6423 assert_pll_disabled(dev_priv, PIPE_C);
6426 I915_WRITE(DISPLAY_PHY_CONTROL, I915_READ(DISPLAY_PHY_CONTROL) &
6427 ~PHY_COM_LANE_RESET_DEASSERT(phy));
6429 vlv_set_power_well(dev_priv, power_well, false);
6432 static bool chv_pipe_power_well_enabled(struct drm_i915_private *dev_priv,
6433 struct i915_power_well *power_well)
6435 enum pipe pipe = power_well->data;
6439 mutex_lock(&dev_priv->rps.hw_lock);
6441 state = vlv_punit_read(dev_priv, PUNIT_REG_DSPFREQ) & DP_SSS_MASK(pipe);
6443 * We only ever set the power-on and power-gate states, anything
6444 * else is unexpected.
6446 WARN_ON(state != DP_SSS_PWR_ON(pipe) && state != DP_SSS_PWR_GATE(pipe));
6447 enabled = state == DP_SSS_PWR_ON(pipe);
6450 * A transient state at this point would mean some unexpected party
6451 * is poking at the power controls too.
6453 ctrl = vlv_punit_read(dev_priv, PUNIT_REG_DSPFREQ) & DP_SSC_MASK(pipe);
6454 WARN_ON(ctrl << 16 != state);
6456 mutex_unlock(&dev_priv->rps.hw_lock);
6461 static void chv_set_pipe_power_well(struct drm_i915_private *dev_priv,
6462 struct i915_power_well *power_well,
6465 enum pipe pipe = power_well->data;
6469 state = enable ? DP_SSS_PWR_ON(pipe) : DP_SSS_PWR_GATE(pipe);
6471 mutex_lock(&dev_priv->rps.hw_lock);
6474 ((vlv_punit_read(dev_priv, PUNIT_REG_DSPFREQ) & DP_SSS_MASK(pipe)) == state)
6479 ctrl = vlv_punit_read(dev_priv, PUNIT_REG_DSPFREQ);
6480 ctrl &= ~DP_SSC_MASK(pipe);
6481 ctrl |= enable ? DP_SSC_PWR_ON(pipe) : DP_SSC_PWR_GATE(pipe);
6482 vlv_punit_write(dev_priv, PUNIT_REG_DSPFREQ, ctrl);
6484 if (wait_for(COND, 100))
6485 DRM_ERROR("timout setting power well state %08x (%08x)\n",
6487 vlv_punit_read(dev_priv, PUNIT_REG_DSPFREQ));
6492 mutex_unlock(&dev_priv->rps.hw_lock);
6495 static void chv_pipe_power_well_sync_hw(struct drm_i915_private *dev_priv,
6496 struct i915_power_well *power_well)
6498 chv_set_pipe_power_well(dev_priv, power_well, power_well->count > 0);
6501 static void chv_pipe_power_well_enable(struct drm_i915_private *dev_priv,
6502 struct i915_power_well *power_well)
6504 WARN_ON_ONCE(power_well->data != PIPE_A &&
6505 power_well->data != PIPE_B &&
6506 power_well->data != PIPE_C);
6508 chv_set_pipe_power_well(dev_priv, power_well, true);
6511 static void chv_pipe_power_well_disable(struct drm_i915_private *dev_priv,
6512 struct i915_power_well *power_well)
6514 WARN_ON_ONCE(power_well->data != PIPE_A &&
6515 power_well->data != PIPE_B &&
6516 power_well->data != PIPE_C);
6518 chv_set_pipe_power_well(dev_priv, power_well, false);
6521 static void check_power_well_state(struct drm_i915_private *dev_priv,
6522 struct i915_power_well *power_well)
6524 bool enabled = power_well->ops->is_enabled(dev_priv, power_well);
6526 if (power_well->always_on || !i915.disable_power_well) {
6533 if (enabled != (power_well->count > 0))
6539 WARN(1, "state mismatch for '%s' (always_on %d hw state %d use-count %d disable_power_well %d\n",
6540 power_well->name, power_well->always_on, enabled,
6541 power_well->count, i915.disable_power_well);
6544 void intel_display_power_get(struct drm_i915_private *dev_priv,
6545 enum intel_display_power_domain domain)
6547 struct i915_power_domains *power_domains;
6548 struct i915_power_well *power_well;
6551 intel_runtime_pm_get(dev_priv);
6553 power_domains = &dev_priv->power_domains;
6555 mutex_lock(&power_domains->lock);
6557 for_each_power_well(i, power_well, BIT(domain), power_domains) {
6558 if (!power_well->count++) {
6559 DRM_DEBUG_KMS("enabling %s\n", power_well->name);
6560 power_well->ops->enable(dev_priv, power_well);
6561 power_well->hw_enabled = true;
6564 check_power_well_state(dev_priv, power_well);
6567 power_domains->domain_use_count[domain]++;
6569 mutex_unlock(&power_domains->lock);
6572 void intel_display_power_put(struct drm_i915_private *dev_priv,
6573 enum intel_display_power_domain domain)
6575 struct i915_power_domains *power_domains;
6576 struct i915_power_well *power_well;
6579 power_domains = &dev_priv->power_domains;
6581 mutex_lock(&power_domains->lock);
6583 WARN_ON(!power_domains->domain_use_count[domain]);
6584 power_domains->domain_use_count[domain]--;
6586 for_each_power_well_rev(i, power_well, BIT(domain), power_domains) {
6587 WARN_ON(!power_well->count);
6589 if (!--power_well->count && i915.disable_power_well) {
6590 DRM_DEBUG_KMS("disabling %s\n", power_well->name);
6591 power_well->hw_enabled = false;
6592 power_well->ops->disable(dev_priv, power_well);
6595 check_power_well_state(dev_priv, power_well);
6598 mutex_unlock(&power_domains->lock);
6600 intel_runtime_pm_put(dev_priv);
6603 static struct i915_power_domains *hsw_pwr;
6605 /* Display audio driver power well request */
6606 int i915_request_power_well(void)
6608 struct drm_i915_private *dev_priv;
6613 dev_priv = container_of(hsw_pwr, struct drm_i915_private,
6615 intel_display_power_get(dev_priv, POWER_DOMAIN_AUDIO);
6618 EXPORT_SYMBOL_GPL(i915_request_power_well);
6620 /* Display audio driver power well release */
6621 int i915_release_power_well(void)
6623 struct drm_i915_private *dev_priv;
6628 dev_priv = container_of(hsw_pwr, struct drm_i915_private,
6630 intel_display_power_put(dev_priv, POWER_DOMAIN_AUDIO);
6633 EXPORT_SYMBOL_GPL(i915_release_power_well);
6636 * Private interface for the audio driver to get CDCLK in kHz.
6638 * Caller must request power well using i915_request_power_well() prior to
6641 int i915_get_cdclk_freq(void)
6643 struct drm_i915_private *dev_priv;
6648 dev_priv = container_of(hsw_pwr, struct drm_i915_private,
6651 return intel_ddi_get_cdclk_freq(dev_priv);
6653 EXPORT_SYMBOL_GPL(i915_get_cdclk_freq);
6656 #define POWER_DOMAIN_MASK (BIT(POWER_DOMAIN_NUM) - 1)
6658 #define HSW_ALWAYS_ON_POWER_DOMAINS ( \
6659 BIT(POWER_DOMAIN_PIPE_A) | \
6660 BIT(POWER_DOMAIN_TRANSCODER_EDP) | \
6661 BIT(POWER_DOMAIN_PORT_DDI_A_2_LANES) | \
6662 BIT(POWER_DOMAIN_PORT_DDI_A_4_LANES) | \
6663 BIT(POWER_DOMAIN_PORT_DDI_B_2_LANES) | \
6664 BIT(POWER_DOMAIN_PORT_DDI_B_4_LANES) | \
6665 BIT(POWER_DOMAIN_PORT_DDI_C_2_LANES) | \
6666 BIT(POWER_DOMAIN_PORT_DDI_C_4_LANES) | \
6667 BIT(POWER_DOMAIN_PORT_DDI_D_2_LANES) | \
6668 BIT(POWER_DOMAIN_PORT_DDI_D_4_LANES) | \
6669 BIT(POWER_DOMAIN_PORT_CRT) | \
6670 BIT(POWER_DOMAIN_PLLS) | \
6671 BIT(POWER_DOMAIN_INIT))
6672 #define HSW_DISPLAY_POWER_DOMAINS ( \
6673 (POWER_DOMAIN_MASK & ~HSW_ALWAYS_ON_POWER_DOMAINS) | \
6674 BIT(POWER_DOMAIN_INIT))
6676 #define BDW_ALWAYS_ON_POWER_DOMAINS ( \
6677 HSW_ALWAYS_ON_POWER_DOMAINS | \
6678 BIT(POWER_DOMAIN_PIPE_A_PANEL_FITTER))
6679 #define BDW_DISPLAY_POWER_DOMAINS ( \
6680 (POWER_DOMAIN_MASK & ~BDW_ALWAYS_ON_POWER_DOMAINS) | \
6681 BIT(POWER_DOMAIN_INIT))
6683 #define VLV_ALWAYS_ON_POWER_DOMAINS BIT(POWER_DOMAIN_INIT)
6684 #define VLV_DISPLAY_POWER_DOMAINS POWER_DOMAIN_MASK
6686 #define VLV_DPIO_CMN_BC_POWER_DOMAINS ( \
6687 BIT(POWER_DOMAIN_PORT_DDI_B_2_LANES) | \
6688 BIT(POWER_DOMAIN_PORT_DDI_B_4_LANES) | \
6689 BIT(POWER_DOMAIN_PORT_DDI_C_2_LANES) | \
6690 BIT(POWER_DOMAIN_PORT_DDI_C_4_LANES) | \
6691 BIT(POWER_DOMAIN_PORT_CRT) | \
6692 BIT(POWER_DOMAIN_INIT))
6694 #define VLV_DPIO_TX_B_LANES_01_POWER_DOMAINS ( \
6695 BIT(POWER_DOMAIN_PORT_DDI_B_2_LANES) | \
6696 BIT(POWER_DOMAIN_PORT_DDI_B_4_LANES) | \
6697 BIT(POWER_DOMAIN_INIT))
6699 #define VLV_DPIO_TX_B_LANES_23_POWER_DOMAINS ( \
6700 BIT(POWER_DOMAIN_PORT_DDI_B_4_LANES) | \
6701 BIT(POWER_DOMAIN_INIT))
6703 #define VLV_DPIO_TX_C_LANES_01_POWER_DOMAINS ( \
6704 BIT(POWER_DOMAIN_PORT_DDI_C_2_LANES) | \
6705 BIT(POWER_DOMAIN_PORT_DDI_C_4_LANES) | \
6706 BIT(POWER_DOMAIN_INIT))
6708 #define VLV_DPIO_TX_C_LANES_23_POWER_DOMAINS ( \
6709 BIT(POWER_DOMAIN_PORT_DDI_C_4_LANES) | \
6710 BIT(POWER_DOMAIN_INIT))
6712 #define CHV_PIPE_A_POWER_DOMAINS ( \
6713 BIT(POWER_DOMAIN_PIPE_A) | \
6714 BIT(POWER_DOMAIN_INIT))
6716 #define CHV_PIPE_B_POWER_DOMAINS ( \
6717 BIT(POWER_DOMAIN_PIPE_B) | \
6718 BIT(POWER_DOMAIN_INIT))
6720 #define CHV_PIPE_C_POWER_DOMAINS ( \
6721 BIT(POWER_DOMAIN_PIPE_C) | \
6722 BIT(POWER_DOMAIN_INIT))
6724 #define CHV_DPIO_CMN_BC_POWER_DOMAINS ( \
6725 BIT(POWER_DOMAIN_PORT_DDI_B_2_LANES) | \
6726 BIT(POWER_DOMAIN_PORT_DDI_B_4_LANES) | \
6727 BIT(POWER_DOMAIN_PORT_DDI_C_2_LANES) | \
6728 BIT(POWER_DOMAIN_PORT_DDI_C_4_LANES) | \
6729 BIT(POWER_DOMAIN_INIT))
6731 #define CHV_DPIO_CMN_D_POWER_DOMAINS ( \
6732 BIT(POWER_DOMAIN_PORT_DDI_D_2_LANES) | \
6733 BIT(POWER_DOMAIN_PORT_DDI_D_4_LANES) | \
6734 BIT(POWER_DOMAIN_INIT))
6736 #define CHV_DPIO_TX_D_LANES_01_POWER_DOMAINS ( \
6737 BIT(POWER_DOMAIN_PORT_DDI_D_2_LANES) | \
6738 BIT(POWER_DOMAIN_PORT_DDI_D_4_LANES) | \
6739 BIT(POWER_DOMAIN_INIT))
6741 #define CHV_DPIO_TX_D_LANES_23_POWER_DOMAINS ( \
6742 BIT(POWER_DOMAIN_PORT_DDI_D_4_LANES) | \
6743 BIT(POWER_DOMAIN_INIT))
6745 static const struct i915_power_well_ops i9xx_always_on_power_well_ops = {
6746 .sync_hw = i9xx_always_on_power_well_noop,
6747 .enable = i9xx_always_on_power_well_noop,
6748 .disable = i9xx_always_on_power_well_noop,
6749 .is_enabled = i9xx_always_on_power_well_enabled,
6752 static const struct i915_power_well_ops chv_pipe_power_well_ops = {
6753 .sync_hw = chv_pipe_power_well_sync_hw,
6754 .enable = chv_pipe_power_well_enable,
6755 .disable = chv_pipe_power_well_disable,
6756 .is_enabled = chv_pipe_power_well_enabled,
6759 static const struct i915_power_well_ops chv_dpio_cmn_power_well_ops = {
6760 .sync_hw = vlv_power_well_sync_hw,
6761 .enable = chv_dpio_cmn_power_well_enable,
6762 .disable = chv_dpio_cmn_power_well_disable,
6763 .is_enabled = vlv_power_well_enabled,
6766 static struct i915_power_well i9xx_always_on_power_well[] = {
6768 .name = "always-on",
6770 .domains = POWER_DOMAIN_MASK,
6771 .ops = &i9xx_always_on_power_well_ops,
6775 static const struct i915_power_well_ops hsw_power_well_ops = {
6776 .sync_hw = hsw_power_well_sync_hw,
6777 .enable = hsw_power_well_enable,
6778 .disable = hsw_power_well_disable,
6779 .is_enabled = hsw_power_well_enabled,
6782 static struct i915_power_well hsw_power_wells[] = {
6784 .name = "always-on",
6786 .domains = HSW_ALWAYS_ON_POWER_DOMAINS,
6787 .ops = &i9xx_always_on_power_well_ops,
6791 .domains = HSW_DISPLAY_POWER_DOMAINS,
6792 .ops = &hsw_power_well_ops,
6796 static struct i915_power_well bdw_power_wells[] = {
6798 .name = "always-on",
6800 .domains = BDW_ALWAYS_ON_POWER_DOMAINS,
6801 .ops = &i9xx_always_on_power_well_ops,
6805 .domains = BDW_DISPLAY_POWER_DOMAINS,
6806 .ops = &hsw_power_well_ops,
6810 static const struct i915_power_well_ops vlv_display_power_well_ops = {
6811 .sync_hw = vlv_power_well_sync_hw,
6812 .enable = vlv_display_power_well_enable,
6813 .disable = vlv_display_power_well_disable,
6814 .is_enabled = vlv_power_well_enabled,
6817 static const struct i915_power_well_ops vlv_dpio_cmn_power_well_ops = {
6818 .sync_hw = vlv_power_well_sync_hw,
6819 .enable = vlv_dpio_cmn_power_well_enable,
6820 .disable = vlv_dpio_cmn_power_well_disable,
6821 .is_enabled = vlv_power_well_enabled,
6824 static const struct i915_power_well_ops vlv_dpio_power_well_ops = {
6825 .sync_hw = vlv_power_well_sync_hw,
6826 .enable = vlv_power_well_enable,
6827 .disable = vlv_power_well_disable,
6828 .is_enabled = vlv_power_well_enabled,
6831 static struct i915_power_well vlv_power_wells[] = {
6833 .name = "always-on",
6835 .domains = VLV_ALWAYS_ON_POWER_DOMAINS,
6836 .ops = &i9xx_always_on_power_well_ops,
6840 .domains = VLV_DISPLAY_POWER_DOMAINS,
6841 .data = PUNIT_POWER_WELL_DISP2D,
6842 .ops = &vlv_display_power_well_ops,
6845 .name = "dpio-tx-b-01",
6846 .domains = VLV_DPIO_TX_B_LANES_01_POWER_DOMAINS |
6847 VLV_DPIO_TX_B_LANES_23_POWER_DOMAINS |
6848 VLV_DPIO_TX_C_LANES_01_POWER_DOMAINS |
6849 VLV_DPIO_TX_C_LANES_23_POWER_DOMAINS,
6850 .ops = &vlv_dpio_power_well_ops,
6851 .data = PUNIT_POWER_WELL_DPIO_TX_B_LANES_01,
6854 .name = "dpio-tx-b-23",
6855 .domains = VLV_DPIO_TX_B_LANES_01_POWER_DOMAINS |
6856 VLV_DPIO_TX_B_LANES_23_POWER_DOMAINS |
6857 VLV_DPIO_TX_C_LANES_01_POWER_DOMAINS |
6858 VLV_DPIO_TX_C_LANES_23_POWER_DOMAINS,
6859 .ops = &vlv_dpio_power_well_ops,
6860 .data = PUNIT_POWER_WELL_DPIO_TX_B_LANES_23,
6863 .name = "dpio-tx-c-01",
6864 .domains = VLV_DPIO_TX_B_LANES_01_POWER_DOMAINS |
6865 VLV_DPIO_TX_B_LANES_23_POWER_DOMAINS |
6866 VLV_DPIO_TX_C_LANES_01_POWER_DOMAINS |
6867 VLV_DPIO_TX_C_LANES_23_POWER_DOMAINS,
6868 .ops = &vlv_dpio_power_well_ops,
6869 .data = PUNIT_POWER_WELL_DPIO_TX_C_LANES_01,
6872 .name = "dpio-tx-c-23",
6873 .domains = VLV_DPIO_TX_B_LANES_01_POWER_DOMAINS |
6874 VLV_DPIO_TX_B_LANES_23_POWER_DOMAINS |
6875 VLV_DPIO_TX_C_LANES_01_POWER_DOMAINS |
6876 VLV_DPIO_TX_C_LANES_23_POWER_DOMAINS,
6877 .ops = &vlv_dpio_power_well_ops,
6878 .data = PUNIT_POWER_WELL_DPIO_TX_C_LANES_23,
6881 .name = "dpio-common",
6882 .domains = VLV_DPIO_CMN_BC_POWER_DOMAINS,
6883 .data = PUNIT_POWER_WELL_DPIO_CMN_BC,
6884 .ops = &vlv_dpio_cmn_power_well_ops,
6888 static struct i915_power_well chv_power_wells[] = {
6890 .name = "always-on",
6892 .domains = VLV_ALWAYS_ON_POWER_DOMAINS,
6893 .ops = &i9xx_always_on_power_well_ops,
6898 .domains = VLV_DISPLAY_POWER_DOMAINS,
6899 .data = PUNIT_POWER_WELL_DISP2D,
6900 .ops = &vlv_display_power_well_ops,
6904 .domains = CHV_PIPE_A_POWER_DOMAINS,
6906 .ops = &chv_pipe_power_well_ops,
6910 .domains = CHV_PIPE_B_POWER_DOMAINS,
6912 .ops = &chv_pipe_power_well_ops,
6916 .domains = CHV_PIPE_C_POWER_DOMAINS,
6918 .ops = &chv_pipe_power_well_ops,
6922 .name = "dpio-common-bc",
6924 * XXX: cmnreset for one PHY seems to disturb the other.
6925 * As a workaround keep both powered on at the same
6928 .domains = CHV_DPIO_CMN_BC_POWER_DOMAINS | CHV_DPIO_CMN_D_POWER_DOMAINS,
6929 .data = PUNIT_POWER_WELL_DPIO_CMN_BC,
6930 .ops = &chv_dpio_cmn_power_well_ops,
6933 .name = "dpio-common-d",
6935 * XXX: cmnreset for one PHY seems to disturb the other.
6936 * As a workaround keep both powered on at the same
6939 .domains = CHV_DPIO_CMN_BC_POWER_DOMAINS | CHV_DPIO_CMN_D_POWER_DOMAINS,
6940 .data = PUNIT_POWER_WELL_DPIO_CMN_D,
6941 .ops = &chv_dpio_cmn_power_well_ops,
6945 .name = "dpio-tx-b-01",
6946 .domains = VLV_DPIO_TX_B_LANES_01_POWER_DOMAINS |
6947 VLV_DPIO_TX_B_LANES_23_POWER_DOMAINS,
6948 .ops = &vlv_dpio_power_well_ops,
6949 .data = PUNIT_POWER_WELL_DPIO_TX_B_LANES_01,
6952 .name = "dpio-tx-b-23",
6953 .domains = VLV_DPIO_TX_B_LANES_01_POWER_DOMAINS |
6954 VLV_DPIO_TX_B_LANES_23_POWER_DOMAINS,
6955 .ops = &vlv_dpio_power_well_ops,
6956 .data = PUNIT_POWER_WELL_DPIO_TX_B_LANES_23,
6959 .name = "dpio-tx-c-01",
6960 .domains = VLV_DPIO_TX_C_LANES_01_POWER_DOMAINS |
6961 VLV_DPIO_TX_C_LANES_23_POWER_DOMAINS,
6962 .ops = &vlv_dpio_power_well_ops,
6963 .data = PUNIT_POWER_WELL_DPIO_TX_C_LANES_01,
6966 .name = "dpio-tx-c-23",
6967 .domains = VLV_DPIO_TX_C_LANES_01_POWER_DOMAINS |
6968 VLV_DPIO_TX_C_LANES_23_POWER_DOMAINS,
6969 .ops = &vlv_dpio_power_well_ops,
6970 .data = PUNIT_POWER_WELL_DPIO_TX_C_LANES_23,
6973 .name = "dpio-tx-d-01",
6974 .domains = CHV_DPIO_TX_D_LANES_01_POWER_DOMAINS |
6975 CHV_DPIO_TX_D_LANES_23_POWER_DOMAINS,
6976 .ops = &vlv_dpio_power_well_ops,
6977 .data = PUNIT_POWER_WELL_DPIO_TX_D_LANES_01,
6980 .name = "dpio-tx-d-23",
6981 .domains = CHV_DPIO_TX_D_LANES_01_POWER_DOMAINS |
6982 CHV_DPIO_TX_D_LANES_23_POWER_DOMAINS,
6983 .ops = &vlv_dpio_power_well_ops,
6984 .data = PUNIT_POWER_WELL_DPIO_TX_D_LANES_23,
6989 static struct i915_power_well *lookup_power_well(struct drm_i915_private *dev_priv,
6990 enum punit_power_well power_well_id)
6992 struct i915_power_domains *power_domains = &dev_priv->power_domains;
6993 struct i915_power_well *power_well;
6996 for_each_power_well(i, power_well, POWER_DOMAIN_MASK, power_domains) {
6997 if (power_well->data == power_well_id)
7004 #define set_power_wells(power_domains, __power_wells) ({ \
7005 (power_domains)->power_wells = (__power_wells); \
7006 (power_domains)->power_well_count = ARRAY_SIZE(__power_wells); \
7009 int intel_power_domains_init(struct drm_i915_private *dev_priv)
7011 struct i915_power_domains *power_domains = &dev_priv->power_domains;
7013 mutex_init(&power_domains->lock);
7016 * The enabling order will be from lower to higher indexed wells,
7017 * the disabling order is reversed.
7019 if (IS_HASWELL(dev_priv->dev)) {
7020 set_power_wells(power_domains, hsw_power_wells);
7021 hsw_pwr = power_domains;
7022 } else if (IS_BROADWELL(dev_priv->dev)) {
7023 set_power_wells(power_domains, bdw_power_wells);
7024 hsw_pwr = power_domains;
7025 } else if (IS_CHERRYVIEW(dev_priv->dev)) {
7026 set_power_wells(power_domains, chv_power_wells);
7027 } else if (IS_VALLEYVIEW(dev_priv->dev)) {
7028 set_power_wells(power_domains, vlv_power_wells);
7030 set_power_wells(power_domains, i9xx_always_on_power_well);
7036 void intel_power_domains_remove(struct drm_i915_private *dev_priv)
7041 static void intel_power_domains_resume(struct drm_i915_private *dev_priv)
7043 struct i915_power_domains *power_domains = &dev_priv->power_domains;
7044 struct i915_power_well *power_well;
7047 mutex_lock(&power_domains->lock);
7048 for_each_power_well(i, power_well, POWER_DOMAIN_MASK, power_domains) {
7049 power_well->ops->sync_hw(dev_priv, power_well);
7050 power_well->hw_enabled = power_well->ops->is_enabled(dev_priv,
7053 mutex_unlock(&power_domains->lock);
7056 static void vlv_cmnlane_wa(struct drm_i915_private *dev_priv)
7058 struct i915_power_well *cmn =
7059 lookup_power_well(dev_priv, PUNIT_POWER_WELL_DPIO_CMN_BC);
7060 struct i915_power_well *disp2d =
7061 lookup_power_well(dev_priv, PUNIT_POWER_WELL_DISP2D);
7063 /* nothing to do if common lane is already off */
7064 if (!cmn->ops->is_enabled(dev_priv, cmn))
7067 /* If the display might be already active skip this */
7068 if (disp2d->ops->is_enabled(dev_priv, disp2d) &&
7069 I915_READ(DPIO_CTL) & DPIO_CMNRST)
7072 DRM_DEBUG_KMS("toggling display PHY side reset\n");
7074 /* cmnlane needs DPLL registers */
7075 disp2d->ops->enable(dev_priv, disp2d);
7078 * From VLV2A0_DP_eDP_HDMI_DPIO_driver_vbios_notes_11.docx:
7079 * Need to assert and de-assert PHY SB reset by gating the
7080 * common lane power, then un-gating it.
7081 * Simply ungating isn't enough to reset the PHY enough to get
7082 * ports and lanes running.
7084 cmn->ops->disable(dev_priv, cmn);
7087 void intel_power_domains_init_hw(struct drm_i915_private *dev_priv)
7089 struct drm_device *dev = dev_priv->dev;
7090 struct i915_power_domains *power_domains = &dev_priv->power_domains;
7092 power_domains->initializing = true;
7094 if (IS_VALLEYVIEW(dev) && !IS_CHERRYVIEW(dev)) {
7095 mutex_lock(&power_domains->lock);
7096 vlv_cmnlane_wa(dev_priv);
7097 mutex_unlock(&power_domains->lock);
7100 /* For now, we need the power well to be always enabled. */
7101 intel_display_set_init_power(dev_priv, true);
7102 intel_power_domains_resume(dev_priv);
7103 power_domains->initializing = false;
7106 void intel_aux_display_runtime_get(struct drm_i915_private *dev_priv)
7108 intel_runtime_pm_get(dev_priv);
7111 void intel_aux_display_runtime_put(struct drm_i915_private *dev_priv)
7113 intel_runtime_pm_put(dev_priv);
7116 void intel_runtime_pm_get(struct drm_i915_private *dev_priv)
7118 struct drm_device *dev = dev_priv->dev;
7119 struct device *device = &dev->pdev->dev;
7121 if (!HAS_RUNTIME_PM(dev))
7124 pm_runtime_get_sync(device);
7125 WARN(dev_priv->pm.suspended, "Device still suspended.\n");
7128 void intel_runtime_pm_get_noresume(struct drm_i915_private *dev_priv)
7130 struct drm_device *dev = dev_priv->dev;
7131 struct device *device = &dev->pdev->dev;
7133 if (!HAS_RUNTIME_PM(dev))
7136 WARN(dev_priv->pm.suspended, "Getting nosync-ref while suspended.\n");
7137 pm_runtime_get_noresume(device);
7140 void intel_runtime_pm_put(struct drm_i915_private *dev_priv)
7142 struct drm_device *dev = dev_priv->dev;
7143 struct device *device = &dev->pdev->dev;
7145 if (!HAS_RUNTIME_PM(dev))
7148 pm_runtime_mark_last_busy(device);
7149 pm_runtime_put_autosuspend(device);
7152 void intel_init_runtime_pm(struct drm_i915_private *dev_priv)
7154 struct drm_device *dev = dev_priv->dev;
7155 struct device *device = &dev->pdev->dev;
7157 if (!HAS_RUNTIME_PM(dev))
7160 pm_runtime_set_active(device);
7163 * RPM depends on RC6 to save restore the GT HW context, so make RC6 a
7166 if (!intel_enable_rc6(dev)) {
7167 DRM_INFO("RC6 disabled, disabling runtime PM support\n");
7171 pm_runtime_set_autosuspend_delay(device, 10000); /* 10s */
7172 pm_runtime_mark_last_busy(device);
7173 pm_runtime_use_autosuspend(device);
7175 pm_runtime_put_autosuspend(device);
7178 void intel_fini_runtime_pm(struct drm_i915_private *dev_priv)
7180 struct drm_device *dev = dev_priv->dev;
7181 struct device *device = &dev->pdev->dev;
7183 if (!HAS_RUNTIME_PM(dev))
7186 if (!intel_enable_rc6(dev))
7189 /* Make sure we're not suspended first. */
7190 pm_runtime_get_sync(device);
7191 pm_runtime_disable(device);
7194 /* Set up chip specific power management-related functions */
7195 void intel_init_pm(struct drm_device *dev)
7197 struct drm_i915_private *dev_priv = dev->dev_private;
7200 if (INTEL_INFO(dev)->gen >= 7) {
7201 dev_priv->display.fbc_enabled = ironlake_fbc_enabled;
7202 dev_priv->display.enable_fbc = gen7_enable_fbc;
7203 dev_priv->display.disable_fbc = ironlake_disable_fbc;
7204 } else if (INTEL_INFO(dev)->gen >= 5) {
7205 dev_priv->display.fbc_enabled = ironlake_fbc_enabled;
7206 dev_priv->display.enable_fbc = ironlake_enable_fbc;
7207 dev_priv->display.disable_fbc = ironlake_disable_fbc;
7208 } else if (IS_GM45(dev)) {
7209 dev_priv->display.fbc_enabled = g4x_fbc_enabled;
7210 dev_priv->display.enable_fbc = g4x_enable_fbc;
7211 dev_priv->display.disable_fbc = g4x_disable_fbc;
7213 dev_priv->display.fbc_enabled = i8xx_fbc_enabled;
7214 dev_priv->display.enable_fbc = i8xx_enable_fbc;
7215 dev_priv->display.disable_fbc = i8xx_disable_fbc;
7217 /* This value was pulled out of someone's hat */
7218 I915_WRITE(FBC_CONTROL, 500 << FBC_CTL_INTERVAL_SHIFT);
7223 if (IS_PINEVIEW(dev))
7224 i915_pineview_get_mem_freq(dev);
7225 else if (IS_GEN5(dev))
7226 i915_ironlake_get_mem_freq(dev);
7228 /* For FIFO watermark updates */
7229 if (HAS_PCH_SPLIT(dev)) {
7230 ilk_setup_wm_latency(dev);
7232 if ((IS_GEN5(dev) && dev_priv->wm.pri_latency[1] &&
7233 dev_priv->wm.spr_latency[1] && dev_priv->wm.cur_latency[1]) ||
7234 (!IS_GEN5(dev) && dev_priv->wm.pri_latency[0] &&
7235 dev_priv->wm.spr_latency[0] && dev_priv->wm.cur_latency[0])) {
7236 dev_priv->display.update_wm = ilk_update_wm;
7237 dev_priv->display.update_sprite_wm = ilk_update_sprite_wm;
7239 DRM_DEBUG_KMS("Failed to read display plane latency. "
7244 dev_priv->display.init_clock_gating = ironlake_init_clock_gating;
7245 else if (IS_GEN6(dev))
7246 dev_priv->display.init_clock_gating = gen6_init_clock_gating;
7247 else if (IS_IVYBRIDGE(dev))
7248 dev_priv->display.init_clock_gating = ivybridge_init_clock_gating;
7249 else if (IS_HASWELL(dev))
7250 dev_priv->display.init_clock_gating = haswell_init_clock_gating;
7251 else if (INTEL_INFO(dev)->gen == 8)
7252 dev_priv->display.init_clock_gating = gen8_init_clock_gating;
7253 } else if (IS_CHERRYVIEW(dev)) {
7254 dev_priv->display.update_wm = cherryview_update_wm;
7255 dev_priv->display.update_sprite_wm = valleyview_update_sprite_wm;
7256 dev_priv->display.init_clock_gating =
7257 cherryview_init_clock_gating;
7258 } else if (IS_VALLEYVIEW(dev)) {
7259 dev_priv->display.update_wm = valleyview_update_wm;
7260 dev_priv->display.update_sprite_wm = valleyview_update_sprite_wm;
7261 dev_priv->display.init_clock_gating =
7262 valleyview_init_clock_gating;
7263 } else if (IS_PINEVIEW(dev)) {
7264 if (!intel_get_cxsr_latency(IS_PINEVIEW_G(dev),
7267 dev_priv->mem_freq)) {
7268 DRM_INFO("failed to find known CxSR latency "
7269 "(found ddr%s fsb freq %d, mem freq %d), "
7271 (dev_priv->is_ddr3 == 1) ? "3" : "2",
7272 dev_priv->fsb_freq, dev_priv->mem_freq);
7273 /* Disable CxSR and never update its watermark again */
7274 intel_set_memory_cxsr(dev_priv, false);
7275 dev_priv->display.update_wm = NULL;
7277 dev_priv->display.update_wm = pineview_update_wm;
7278 dev_priv->display.init_clock_gating = gen3_init_clock_gating;
7279 } else if (IS_G4X(dev)) {
7280 dev_priv->display.update_wm = g4x_update_wm;
7281 dev_priv->display.init_clock_gating = g4x_init_clock_gating;
7282 } else if (IS_GEN4(dev)) {
7283 dev_priv->display.update_wm = i965_update_wm;
7284 if (IS_CRESTLINE(dev))
7285 dev_priv->display.init_clock_gating = crestline_init_clock_gating;
7286 else if (IS_BROADWATER(dev))
7287 dev_priv->display.init_clock_gating = broadwater_init_clock_gating;
7288 } else if (IS_GEN3(dev)) {
7289 dev_priv->display.update_wm = i9xx_update_wm;
7290 dev_priv->display.get_fifo_size = i9xx_get_fifo_size;
7291 dev_priv->display.init_clock_gating = gen3_init_clock_gating;
7292 } else if (IS_GEN2(dev)) {
7293 if (INTEL_INFO(dev)->num_pipes == 1) {
7294 dev_priv->display.update_wm = i845_update_wm;
7295 dev_priv->display.get_fifo_size = i845_get_fifo_size;
7297 dev_priv->display.update_wm = i9xx_update_wm;
7298 dev_priv->display.get_fifo_size = i830_get_fifo_size;
7301 if (IS_I85X(dev) || IS_I865G(dev))
7302 dev_priv->display.init_clock_gating = i85x_init_clock_gating;
7304 dev_priv->display.init_clock_gating = i830_init_clock_gating;
7306 DRM_ERROR("unexpected fall-through in intel_init_pm\n");
7310 int sandybridge_pcode_read(struct drm_i915_private *dev_priv, u8 mbox, u32 *val)
7312 WARN_ON(!mutex_is_locked(&dev_priv->rps.hw_lock));
7314 if (I915_READ(GEN6_PCODE_MAILBOX) & GEN6_PCODE_READY) {
7315 DRM_DEBUG_DRIVER("warning: pcode (read) mailbox access failed\n");
7319 I915_WRITE(GEN6_PCODE_DATA, *val);
7320 I915_WRITE(GEN6_PCODE_MAILBOX, GEN6_PCODE_READY | mbox);
7322 if (wait_for((I915_READ(GEN6_PCODE_MAILBOX) & GEN6_PCODE_READY) == 0,
7324 DRM_ERROR("timeout waiting for pcode read (%d) to finish\n", mbox);
7328 *val = I915_READ(GEN6_PCODE_DATA);
7329 I915_WRITE(GEN6_PCODE_DATA, 0);
7334 int sandybridge_pcode_write(struct drm_i915_private *dev_priv, u8 mbox, u32 val)
7336 WARN_ON(!mutex_is_locked(&dev_priv->rps.hw_lock));
7338 if (I915_READ(GEN6_PCODE_MAILBOX) & GEN6_PCODE_READY) {
7339 DRM_DEBUG_DRIVER("warning: pcode (write) mailbox access failed\n");
7343 I915_WRITE(GEN6_PCODE_DATA, val);
7344 I915_WRITE(GEN6_PCODE_MAILBOX, GEN6_PCODE_READY | mbox);
7346 if (wait_for((I915_READ(GEN6_PCODE_MAILBOX) & GEN6_PCODE_READY) == 0,
7348 DRM_ERROR("timeout waiting for pcode write (%d) to finish\n", mbox);
7352 I915_WRITE(GEN6_PCODE_DATA, 0);
7357 static int byt_gpu_freq(struct drm_i915_private *dev_priv, int val)
7362 switch (dev_priv->mem_freq) {
7376 return DIV_ROUND_CLOSEST(dev_priv->mem_freq * (val + 6 - 0xbd), 4 * div);
7379 static int byt_freq_opcode(struct drm_i915_private *dev_priv, int val)
7384 switch (dev_priv->mem_freq) {
7398 return DIV_ROUND_CLOSEST(4 * mul * val, dev_priv->mem_freq) + 0xbd - 6;
7401 static int chv_gpu_freq(struct drm_i915_private *dev_priv, int val)
7405 switch (dev_priv->rps.cz_freq) {
7421 freq = (DIV_ROUND_CLOSEST((dev_priv->rps.cz_freq * val), 2 * div) / 2);
7426 static int chv_freq_opcode(struct drm_i915_private *dev_priv, int val)
7430 switch (dev_priv->rps.cz_freq) {
7446 opcode = (DIV_ROUND_CLOSEST((val * 2 * mul), dev_priv->rps.cz_freq) * 2);
7451 int vlv_gpu_freq(struct drm_i915_private *dev_priv, int val)
7455 if (IS_CHERRYVIEW(dev_priv->dev))
7456 ret = chv_gpu_freq(dev_priv, val);
7457 else if (IS_VALLEYVIEW(dev_priv->dev))
7458 ret = byt_gpu_freq(dev_priv, val);
7463 int vlv_freq_opcode(struct drm_i915_private *dev_priv, int val)
7467 if (IS_CHERRYVIEW(dev_priv->dev))
7468 ret = chv_freq_opcode(dev_priv, val);
7469 else if (IS_VALLEYVIEW(dev_priv->dev))
7470 ret = byt_freq_opcode(dev_priv, val);
7475 void intel_pm_setup(struct drm_device *dev)
7477 struct drm_i915_private *dev_priv = dev->dev_private;
7479 mutex_init(&dev_priv->rps.hw_lock);
7481 INIT_DELAYED_WORK(&dev_priv->rps.delayed_resume_work,
7482 intel_gen6_powersave_work);
7484 dev_priv->pm.suspended = false;
7485 dev_priv->pm._irqs_disabled = false;