2 * Copyright © 2006-2007 Intel Corporation
3 * Copyright (c) 2006 Dave Airlie <airlied@linux.ie>
5 * Permission is hereby granted, free of charge, to any person obtaining a
6 * copy of this software and associated documentation files (the "Software"),
7 * to deal in the Software without restriction, including without limitation
8 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
9 * and/or sell copies of the Software, and to permit persons to whom the
10 * Software is furnished to do so, subject to the following conditions:
12 * The above copyright notice and this permission notice (including the next
13 * paragraph) shall be included in all copies or substantial portions of the
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
21 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
22 * DEALINGS IN THE SOFTWARE.
25 * Eric Anholt <eric@anholt.net>
26 * Dave Airlie <airlied@linux.ie>
27 * Jesse Barnes <jesse.barnes@intel.com>
30 #include <acpi/button.h>
31 #include <linux/dmi.h>
32 #include <linux/i2c.h>
33 #include <linux/slab.h>
35 #include <drm/drm_crtc.h>
36 #include <drm/drm_edid.h>
37 #include "intel_drv.h"
38 #include <drm/i915_drm.h>
40 #include <linux/acpi.h>
42 /* Private structure for the integrated LVDS support */
43 struct intel_lvds_connector {
44 struct intel_connector base;
46 struct notifier_block lid_notifier;
49 struct intel_lvds_encoder {
50 struct intel_encoder base;
58 struct intel_lvds_connector *attached_connector;
61 static struct intel_lvds_encoder *to_lvds_encoder(struct drm_encoder *encoder)
63 return container_of(encoder, struct intel_lvds_encoder, base.base);
66 static struct intel_lvds_connector *to_lvds_connector(struct drm_connector *connector)
68 return container_of(connector, struct intel_lvds_connector, base.base);
71 static bool intel_lvds_get_hw_state(struct intel_encoder *encoder,
74 struct drm_device *dev = encoder->base.dev;
75 struct drm_i915_private *dev_priv = dev->dev_private;
76 struct intel_lvds_encoder *lvds_encoder = to_lvds_encoder(&encoder->base);
79 tmp = I915_READ(lvds_encoder->reg);
81 if (!(tmp & LVDS_PORT_EN))
85 *pipe = PORT_TO_PIPE_CPT(tmp);
87 *pipe = PORT_TO_PIPE(tmp);
92 /* The LVDS pin pair needs to be on before the DPLLs are enabled.
93 * This is an exception to the general rule that mode_set doesn't turn
96 static void intel_pre_pll_enable_lvds(struct intel_encoder *encoder)
98 struct intel_lvds_encoder *lvds_encoder = to_lvds_encoder(&encoder->base);
99 struct drm_device *dev = encoder->base.dev;
100 struct drm_i915_private *dev_priv = dev->dev_private;
101 struct intel_crtc *intel_crtc = to_intel_crtc(encoder->base.crtc);
102 struct drm_display_mode *fixed_mode =
103 lvds_encoder->attached_connector->base.panel.fixed_mode;
104 int pipe = intel_crtc->pipe;
107 temp = I915_READ(lvds_encoder->reg);
108 temp |= LVDS_PORT_EN | LVDS_A0A2_CLKA_POWER_UP;
110 if (HAS_PCH_CPT(dev)) {
111 temp &= ~PORT_TRANS_SEL_MASK;
112 temp |= PORT_TRANS_SEL_CPT(pipe);
115 temp |= LVDS_PIPEB_SELECT;
117 temp &= ~LVDS_PIPEB_SELECT;
121 /* set the corresponsding LVDS_BORDER bit */
122 temp |= dev_priv->lvds_border_bits;
123 /* Set the B0-B3 data pairs corresponding to whether we're going to
124 * set the DPLLs for dual-channel mode or not.
126 if (lvds_encoder->is_dual_link)
127 temp |= LVDS_B0B3_POWER_UP | LVDS_CLKB_POWER_UP;
129 temp &= ~(LVDS_B0B3_POWER_UP | LVDS_CLKB_POWER_UP);
131 /* It would be nice to set 24 vs 18-bit mode (LVDS_A3_POWER_UP)
132 * appropriately here, but we need to look more thoroughly into how
133 * panels behave in the two modes.
136 /* Set the dithering flag on LVDS as needed, note that there is no
137 * special lvds dither control bit on pch-split platforms, dithering is
138 * only controlled through the PIPECONF reg. */
139 if (INTEL_INFO(dev)->gen == 4) {
140 if (dev_priv->lvds_dither)
141 temp |= LVDS_ENABLE_DITHER;
143 temp &= ~LVDS_ENABLE_DITHER;
145 temp &= ~(LVDS_HSYNC_POLARITY | LVDS_VSYNC_POLARITY);
146 if (fixed_mode->flags & DRM_MODE_FLAG_NHSYNC)
147 temp |= LVDS_HSYNC_POLARITY;
148 if (fixed_mode->flags & DRM_MODE_FLAG_NVSYNC)
149 temp |= LVDS_VSYNC_POLARITY;
151 I915_WRITE(lvds_encoder->reg, temp);
155 * Sets the power state for the panel.
157 static void intel_enable_lvds(struct intel_encoder *encoder)
159 struct drm_device *dev = encoder->base.dev;
160 struct intel_lvds_encoder *lvds_encoder = to_lvds_encoder(&encoder->base);
161 struct intel_crtc *intel_crtc = to_intel_crtc(encoder->base.crtc);
162 struct drm_i915_private *dev_priv = dev->dev_private;
163 u32 ctl_reg, stat_reg;
165 if (HAS_PCH_SPLIT(dev)) {
166 ctl_reg = PCH_PP_CONTROL;
167 stat_reg = PCH_PP_STATUS;
169 ctl_reg = PP_CONTROL;
170 stat_reg = PP_STATUS;
173 I915_WRITE(lvds_encoder->reg, I915_READ(lvds_encoder->reg) | LVDS_PORT_EN);
175 if (lvds_encoder->pfit_dirty) {
177 * Enable automatic panel scaling so that non-native modes
178 * fill the screen. The panel fitter should only be
179 * adjusted whilst the pipe is disabled, according to
180 * register description and PRM.
182 DRM_DEBUG_KMS("applying panel-fitter: %x, %x\n",
183 lvds_encoder->pfit_control,
184 lvds_encoder->pfit_pgm_ratios);
186 I915_WRITE(PFIT_PGM_RATIOS, lvds_encoder->pfit_pgm_ratios);
187 I915_WRITE(PFIT_CONTROL, lvds_encoder->pfit_control);
188 lvds_encoder->pfit_dirty = false;
191 I915_WRITE(ctl_reg, I915_READ(ctl_reg) | POWER_TARGET_ON);
192 POSTING_READ(lvds_encoder->reg);
193 if (wait_for((I915_READ(stat_reg) & PP_ON) != 0, 1000))
194 DRM_ERROR("timed out waiting for panel to power on\n");
196 intel_panel_enable_backlight(dev, intel_crtc->pipe);
199 static void intel_disable_lvds(struct intel_encoder *encoder)
201 struct drm_device *dev = encoder->base.dev;
202 struct intel_lvds_encoder *lvds_encoder = to_lvds_encoder(&encoder->base);
203 struct drm_i915_private *dev_priv = dev->dev_private;
204 u32 ctl_reg, stat_reg;
206 if (HAS_PCH_SPLIT(dev)) {
207 ctl_reg = PCH_PP_CONTROL;
208 stat_reg = PCH_PP_STATUS;
210 ctl_reg = PP_CONTROL;
211 stat_reg = PP_STATUS;
214 intel_panel_disable_backlight(dev);
216 I915_WRITE(ctl_reg, I915_READ(ctl_reg) & ~POWER_TARGET_ON);
217 if (wait_for((I915_READ(stat_reg) & PP_ON) == 0, 1000))
218 DRM_ERROR("timed out waiting for panel to power off\n");
220 if (lvds_encoder->pfit_control) {
221 I915_WRITE(PFIT_CONTROL, 0);
222 lvds_encoder->pfit_dirty = true;
225 I915_WRITE(lvds_encoder->reg, I915_READ(lvds_encoder->reg) & ~LVDS_PORT_EN);
226 POSTING_READ(lvds_encoder->reg);
229 static int intel_lvds_mode_valid(struct drm_connector *connector,
230 struct drm_display_mode *mode)
232 struct intel_connector *intel_connector = to_intel_connector(connector);
233 struct drm_display_mode *fixed_mode = intel_connector->panel.fixed_mode;
235 if (mode->hdisplay > fixed_mode->hdisplay)
237 if (mode->vdisplay > fixed_mode->vdisplay)
244 centre_horizontally(struct drm_display_mode *mode,
247 u32 border, sync_pos, blank_width, sync_width;
249 /* keep the hsync and hblank widths constant */
250 sync_width = mode->crtc_hsync_end - mode->crtc_hsync_start;
251 blank_width = mode->crtc_hblank_end - mode->crtc_hblank_start;
252 sync_pos = (blank_width - sync_width + 1) / 2;
254 border = (mode->hdisplay - width + 1) / 2;
255 border += border & 1; /* make the border even */
257 mode->crtc_hdisplay = width;
258 mode->crtc_hblank_start = width + border;
259 mode->crtc_hblank_end = mode->crtc_hblank_start + blank_width;
261 mode->crtc_hsync_start = mode->crtc_hblank_start + sync_pos;
262 mode->crtc_hsync_end = mode->crtc_hsync_start + sync_width;
264 mode->private_flags |= INTEL_MODE_CRTC_TIMINGS_SET;
268 centre_vertically(struct drm_display_mode *mode,
271 u32 border, sync_pos, blank_width, sync_width;
273 /* keep the vsync and vblank widths constant */
274 sync_width = mode->crtc_vsync_end - mode->crtc_vsync_start;
275 blank_width = mode->crtc_vblank_end - mode->crtc_vblank_start;
276 sync_pos = (blank_width - sync_width + 1) / 2;
278 border = (mode->vdisplay - height + 1) / 2;
280 mode->crtc_vdisplay = height;
281 mode->crtc_vblank_start = height + border;
282 mode->crtc_vblank_end = mode->crtc_vblank_start + blank_width;
284 mode->crtc_vsync_start = mode->crtc_vblank_start + sync_pos;
285 mode->crtc_vsync_end = mode->crtc_vsync_start + sync_width;
287 mode->private_flags |= INTEL_MODE_CRTC_TIMINGS_SET;
290 static inline u32 panel_fitter_scaling(u32 source, u32 target)
293 * Floating point operation is not supported. So the FACTOR
294 * is defined, which can avoid the floating point computation
295 * when calculating the panel ratio.
298 #define FACTOR (1 << ACCURACY)
299 u32 ratio = source * FACTOR / target;
300 return (FACTOR * ratio + FACTOR/2) / FACTOR;
303 static bool intel_lvds_mode_fixup(struct drm_encoder *encoder,
304 const struct drm_display_mode *mode,
305 struct drm_display_mode *adjusted_mode)
307 struct drm_device *dev = encoder->dev;
308 struct drm_i915_private *dev_priv = dev->dev_private;
309 struct intel_lvds_encoder *lvds_encoder = to_lvds_encoder(encoder);
310 struct intel_connector *intel_connector =
311 &lvds_encoder->attached_connector->base;
312 struct intel_crtc *intel_crtc = lvds_encoder->base.new_crtc;
313 u32 pfit_control = 0, pfit_pgm_ratios = 0, border = 0;
316 /* Should never happen!! */
317 if (INTEL_INFO(dev)->gen < 4 && intel_crtc->pipe == 0) {
318 DRM_ERROR("Can't support LVDS on pipe A\n");
322 if (intel_encoder_check_is_cloned(&lvds_encoder->base))
326 * We have timings from the BIOS for the panel, put them in
327 * to the adjusted mode. The CRTC will be set up for this mode,
328 * with the panel scaling set up to source from the H/VDisplay
329 * of the original mode.
331 intel_fixed_panel_mode(intel_connector->panel.fixed_mode,
334 if (HAS_PCH_SPLIT(dev)) {
335 intel_pch_panel_fitting(dev,
336 intel_connector->panel.fitting_mode,
337 mode, adjusted_mode);
341 /* Native modes don't need fitting */
342 if (adjusted_mode->hdisplay == mode->hdisplay &&
343 adjusted_mode->vdisplay == mode->vdisplay)
346 /* 965+ wants fuzzy fitting */
347 if (INTEL_INFO(dev)->gen >= 4)
348 pfit_control |= ((intel_crtc->pipe << PFIT_PIPE_SHIFT) |
352 * Enable automatic panel scaling for non-native modes so that they fill
353 * the screen. Should be enabled before the pipe is enabled, according
354 * to register description and PRM.
355 * Change the value here to see the borders for debugging
358 I915_WRITE(BCLRPAT(pipe), 0);
360 drm_mode_set_crtcinfo(adjusted_mode, 0);
362 switch (intel_connector->panel.fitting_mode) {
363 case DRM_MODE_SCALE_CENTER:
365 * For centered modes, we have to calculate border widths &
366 * heights and modify the values programmed into the CRTC.
368 centre_horizontally(adjusted_mode, mode->hdisplay);
369 centre_vertically(adjusted_mode, mode->vdisplay);
370 border = LVDS_BORDER_ENABLE;
373 case DRM_MODE_SCALE_ASPECT:
374 /* Scale but preserve the aspect ratio */
375 if (INTEL_INFO(dev)->gen >= 4) {
376 u32 scaled_width = adjusted_mode->hdisplay * mode->vdisplay;
377 u32 scaled_height = mode->hdisplay * adjusted_mode->vdisplay;
379 /* 965+ is easy, it does everything in hw */
380 if (scaled_width > scaled_height)
381 pfit_control |= PFIT_ENABLE | PFIT_SCALING_PILLAR;
382 else if (scaled_width < scaled_height)
383 pfit_control |= PFIT_ENABLE | PFIT_SCALING_LETTER;
384 else if (adjusted_mode->hdisplay != mode->hdisplay)
385 pfit_control |= PFIT_ENABLE | PFIT_SCALING_AUTO;
387 u32 scaled_width = adjusted_mode->hdisplay * mode->vdisplay;
388 u32 scaled_height = mode->hdisplay * adjusted_mode->vdisplay;
390 * For earlier chips we have to calculate the scaling
391 * ratio by hand and program it into the
392 * PFIT_PGM_RATIO register
394 if (scaled_width > scaled_height) { /* pillar */
395 centre_horizontally(adjusted_mode, scaled_height / mode->vdisplay);
397 border = LVDS_BORDER_ENABLE;
398 if (mode->vdisplay != adjusted_mode->vdisplay) {
399 u32 bits = panel_fitter_scaling(mode->vdisplay, adjusted_mode->vdisplay);
400 pfit_pgm_ratios |= (bits << PFIT_HORIZ_SCALE_SHIFT |
401 bits << PFIT_VERT_SCALE_SHIFT);
402 pfit_control |= (PFIT_ENABLE |
403 VERT_INTERP_BILINEAR |
404 HORIZ_INTERP_BILINEAR);
406 } else if (scaled_width < scaled_height) { /* letter */
407 centre_vertically(adjusted_mode, scaled_width / mode->hdisplay);
409 border = LVDS_BORDER_ENABLE;
410 if (mode->hdisplay != adjusted_mode->hdisplay) {
411 u32 bits = panel_fitter_scaling(mode->hdisplay, adjusted_mode->hdisplay);
412 pfit_pgm_ratios |= (bits << PFIT_HORIZ_SCALE_SHIFT |
413 bits << PFIT_VERT_SCALE_SHIFT);
414 pfit_control |= (PFIT_ENABLE |
415 VERT_INTERP_BILINEAR |
416 HORIZ_INTERP_BILINEAR);
419 /* Aspects match, Let hw scale both directions */
420 pfit_control |= (PFIT_ENABLE |
421 VERT_AUTO_SCALE | HORIZ_AUTO_SCALE |
422 VERT_INTERP_BILINEAR |
423 HORIZ_INTERP_BILINEAR);
427 case DRM_MODE_SCALE_FULLSCREEN:
429 * Full scaling, even if it changes the aspect ratio.
430 * Fortunately this is all done for us in hw.
432 if (mode->vdisplay != adjusted_mode->vdisplay ||
433 mode->hdisplay != adjusted_mode->hdisplay) {
434 pfit_control |= PFIT_ENABLE;
435 if (INTEL_INFO(dev)->gen >= 4)
436 pfit_control |= PFIT_SCALING_AUTO;
438 pfit_control |= (VERT_AUTO_SCALE |
439 VERT_INTERP_BILINEAR |
441 HORIZ_INTERP_BILINEAR);
450 /* If not enabling scaling, be consistent and always use 0. */
451 if ((pfit_control & PFIT_ENABLE) == 0) {
456 /* Make sure pre-965 set dither correctly */
457 if (INTEL_INFO(dev)->gen < 4 && dev_priv->lvds_dither)
458 pfit_control |= PANEL_8TO6_DITHER_ENABLE;
460 if (pfit_control != lvds_encoder->pfit_control ||
461 pfit_pgm_ratios != lvds_encoder->pfit_pgm_ratios) {
462 lvds_encoder->pfit_control = pfit_control;
463 lvds_encoder->pfit_pgm_ratios = pfit_pgm_ratios;
464 lvds_encoder->pfit_dirty = true;
466 dev_priv->lvds_border_bits = border;
469 * XXX: It would be nice to support lower refresh rates on the
470 * panels to reduce power consumption, and perhaps match the
471 * user's requested refresh rate.
477 static void intel_lvds_mode_set(struct drm_encoder *encoder,
478 struct drm_display_mode *mode,
479 struct drm_display_mode *adjusted_mode)
482 * The LVDS pin pair will already have been turned on in the
483 * intel_crtc_mode_set since it has a large impact on the DPLL
489 * Detect the LVDS connection.
491 * Since LVDS doesn't have hotlug, we use the lid as a proxy. Open means
492 * connected and closed means disconnected. We also send hotplug events as
493 * needed, using lid status notification from the input layer.
495 static enum drm_connector_status
496 intel_lvds_detect(struct drm_connector *connector, bool force)
498 struct drm_device *dev = connector->dev;
499 enum drm_connector_status status;
501 status = intel_panel_detect(dev);
502 if (status != connector_status_unknown)
505 return connector_status_connected;
509 * Return the list of DDC modes if available, or the BIOS fixed mode otherwise.
511 static int intel_lvds_get_modes(struct drm_connector *connector)
513 struct intel_lvds_connector *lvds_connector = to_lvds_connector(connector);
514 struct drm_device *dev = connector->dev;
515 struct drm_display_mode *mode;
517 /* use cached edid if we have one */
518 if (!IS_ERR_OR_NULL(lvds_connector->base.edid))
519 return drm_add_edid_modes(connector, lvds_connector->base.edid);
521 mode = drm_mode_duplicate(dev, lvds_connector->base.panel.fixed_mode);
525 drm_mode_probed_add(connector, mode);
529 static int intel_no_modeset_on_lid_dmi_callback(const struct dmi_system_id *id)
531 DRM_INFO("Skipping forced modeset for %s\n", id->ident);
535 /* The GPU hangs up on these systems if modeset is performed on LID open */
536 static const struct dmi_system_id intel_no_modeset_on_lid[] = {
538 .callback = intel_no_modeset_on_lid_dmi_callback,
539 .ident = "Toshiba Tecra A11",
541 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
542 DMI_MATCH(DMI_PRODUCT_NAME, "TECRA A11"),
546 { } /* terminating entry */
550 * Lid events. Note the use of 'modeset_on_lid':
551 * - we set it on lid close, and reset it on open
552 * - we use it as a "only once" bit (ie we ignore
553 * duplicate events where it was already properly
555 * - the suspend/resume paths will also set it to
556 * zero, since they restore the mode ("lid open").
558 static int intel_lid_notify(struct notifier_block *nb, unsigned long val,
561 struct intel_lvds_connector *lvds_connector =
562 container_of(nb, struct intel_lvds_connector, lid_notifier);
563 struct drm_connector *connector = &lvds_connector->base.base;
564 struct drm_device *dev = connector->dev;
565 struct drm_i915_private *dev_priv = dev->dev_private;
567 if (dev->switch_power_state != DRM_SWITCH_POWER_ON)
571 * check and update the status of LVDS connector after receiving
572 * the LID nofication event.
574 connector->status = connector->funcs->detect(connector, false);
576 /* Don't force modeset on machines where it causes a GPU lockup */
577 if (dmi_check_system(intel_no_modeset_on_lid))
579 if (!acpi_lid_open()) {
580 dev_priv->modeset_on_lid = 1;
584 if (!dev_priv->modeset_on_lid)
587 dev_priv->modeset_on_lid = 0;
589 mutex_lock(&dev->mode_config.mutex);
590 intel_modeset_setup_hw_state(dev, true);
591 mutex_unlock(&dev->mode_config.mutex);
597 * intel_lvds_destroy - unregister and free LVDS structures
598 * @connector: connector to free
600 * Unregister the DDC bus for this connector then free the driver private
603 static void intel_lvds_destroy(struct drm_connector *connector)
605 struct intel_lvds_connector *lvds_connector =
606 to_lvds_connector(connector);
608 if (lvds_connector->lid_notifier.notifier_call)
609 acpi_lid_notifier_unregister(&lvds_connector->lid_notifier);
611 if (!IS_ERR_OR_NULL(lvds_connector->base.edid))
612 kfree(lvds_connector->base.edid);
614 intel_panel_destroy_backlight(connector->dev);
615 intel_panel_fini(&lvds_connector->base.panel);
617 drm_sysfs_connector_remove(connector);
618 drm_connector_cleanup(connector);
622 static int intel_lvds_set_property(struct drm_connector *connector,
623 struct drm_property *property,
626 struct intel_connector *intel_connector = to_intel_connector(connector);
627 struct drm_device *dev = connector->dev;
629 if (property == dev->mode_config.scaling_mode_property) {
630 struct drm_crtc *crtc;
632 if (value == DRM_MODE_SCALE_NONE) {
633 DRM_DEBUG_KMS("no scaling not supported\n");
637 if (intel_connector->panel.fitting_mode == value) {
638 /* the LVDS scaling property is not changed */
641 intel_connector->panel.fitting_mode = value;
643 crtc = intel_attached_encoder(connector)->base.crtc;
644 if (crtc && crtc->enabled) {
646 * If the CRTC is enabled, the display will be changed
647 * according to the new panel fitting mode.
649 intel_crtc_restore_mode(crtc);
656 static const struct drm_encoder_helper_funcs intel_lvds_helper_funcs = {
657 .mode_fixup = intel_lvds_mode_fixup,
658 .mode_set = intel_lvds_mode_set,
659 .disable = intel_encoder_noop,
662 static const struct drm_connector_helper_funcs intel_lvds_connector_helper_funcs = {
663 .get_modes = intel_lvds_get_modes,
664 .mode_valid = intel_lvds_mode_valid,
665 .best_encoder = intel_best_encoder,
668 static const struct drm_connector_funcs intel_lvds_connector_funcs = {
669 .dpms = intel_connector_dpms,
670 .detect = intel_lvds_detect,
671 .fill_modes = drm_helper_probe_single_connector_modes,
672 .set_property = intel_lvds_set_property,
673 .destroy = intel_lvds_destroy,
676 static const struct drm_encoder_funcs intel_lvds_enc_funcs = {
677 .destroy = intel_encoder_destroy,
680 static int __init intel_no_lvds_dmi_callback(const struct dmi_system_id *id)
682 DRM_INFO("Skipping LVDS initialization for %s\n", id->ident);
686 /* These systems claim to have LVDS, but really don't */
687 static const struct dmi_system_id intel_no_lvds[] = {
689 .callback = intel_no_lvds_dmi_callback,
690 .ident = "Apple Mac Mini (Core series)",
692 DMI_MATCH(DMI_SYS_VENDOR, "Apple"),
693 DMI_MATCH(DMI_PRODUCT_NAME, "Macmini1,1"),
697 .callback = intel_no_lvds_dmi_callback,
698 .ident = "Apple Mac Mini (Core 2 series)",
700 DMI_MATCH(DMI_SYS_VENDOR, "Apple"),
701 DMI_MATCH(DMI_PRODUCT_NAME, "Macmini2,1"),
705 .callback = intel_no_lvds_dmi_callback,
706 .ident = "MSI IM-945GSE-A",
708 DMI_MATCH(DMI_SYS_VENDOR, "MSI"),
709 DMI_MATCH(DMI_PRODUCT_NAME, "A9830IMS"),
713 .callback = intel_no_lvds_dmi_callback,
714 .ident = "Dell Studio Hybrid",
716 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
717 DMI_MATCH(DMI_PRODUCT_NAME, "Studio Hybrid 140g"),
721 .callback = intel_no_lvds_dmi_callback,
722 .ident = "Dell OptiPlex FX170",
724 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
725 DMI_MATCH(DMI_PRODUCT_NAME, "OptiPlex FX170"),
729 .callback = intel_no_lvds_dmi_callback,
730 .ident = "AOpen Mini PC",
732 DMI_MATCH(DMI_SYS_VENDOR, "AOpen"),
733 DMI_MATCH(DMI_PRODUCT_NAME, "i965GMx-IF"),
737 .callback = intel_no_lvds_dmi_callback,
738 .ident = "AOpen Mini PC MP915",
740 DMI_MATCH(DMI_BOARD_VENDOR, "AOpen"),
741 DMI_MATCH(DMI_BOARD_NAME, "i915GMx-F"),
745 .callback = intel_no_lvds_dmi_callback,
746 .ident = "AOpen i915GMm-HFS",
748 DMI_MATCH(DMI_BOARD_VENDOR, "AOpen"),
749 DMI_MATCH(DMI_BOARD_NAME, "i915GMm-HFS"),
753 .callback = intel_no_lvds_dmi_callback,
754 .ident = "AOpen i45GMx-I",
756 DMI_MATCH(DMI_BOARD_VENDOR, "AOpen"),
757 DMI_MATCH(DMI_BOARD_NAME, "i45GMx-I"),
761 .callback = intel_no_lvds_dmi_callback,
762 .ident = "Aopen i945GTt-VFA",
764 DMI_MATCH(DMI_PRODUCT_VERSION, "AO00001JW"),
768 .callback = intel_no_lvds_dmi_callback,
769 .ident = "Clientron U800",
771 DMI_MATCH(DMI_SYS_VENDOR, "Clientron"),
772 DMI_MATCH(DMI_PRODUCT_NAME, "U800"),
776 .callback = intel_no_lvds_dmi_callback,
777 .ident = "Clientron E830",
779 DMI_MATCH(DMI_SYS_VENDOR, "Clientron"),
780 DMI_MATCH(DMI_PRODUCT_NAME, "E830"),
784 .callback = intel_no_lvds_dmi_callback,
785 .ident = "Asus EeeBox PC EB1007",
787 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK Computer INC."),
788 DMI_MATCH(DMI_PRODUCT_NAME, "EB1007"),
792 .callback = intel_no_lvds_dmi_callback,
793 .ident = "Asus AT5NM10T-I",
795 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
796 DMI_MATCH(DMI_BOARD_NAME, "AT5NM10T-I"),
800 .callback = intel_no_lvds_dmi_callback,
801 .ident = "Hewlett-Packard HP t5740e Thin Client",
803 DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"),
804 DMI_MATCH(DMI_PRODUCT_NAME, "HP t5740e Thin Client"),
808 .callback = intel_no_lvds_dmi_callback,
809 .ident = "Hewlett-Packard t5745",
811 DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"),
812 DMI_MATCH(DMI_PRODUCT_NAME, "hp t5745"),
816 .callback = intel_no_lvds_dmi_callback,
817 .ident = "Hewlett-Packard st5747",
819 DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"),
820 DMI_MATCH(DMI_PRODUCT_NAME, "hp st5747"),
824 .callback = intel_no_lvds_dmi_callback,
825 .ident = "MSI Wind Box DC500",
827 DMI_MATCH(DMI_BOARD_VENDOR, "MICRO-STAR INTERNATIONAL CO., LTD"),
828 DMI_MATCH(DMI_BOARD_NAME, "MS-7469"),
832 .callback = intel_no_lvds_dmi_callback,
833 .ident = "ZOTAC ZBOXSD-ID12/ID13",
835 DMI_MATCH(DMI_BOARD_VENDOR, "ZOTAC"),
836 DMI_MATCH(DMI_BOARD_NAME, "ZBOXSD-ID12/ID13"),
840 .callback = intel_no_lvds_dmi_callback,
841 .ident = "Gigabyte GA-D525TUD",
843 DMI_MATCH(DMI_BOARD_VENDOR, "Gigabyte Technology Co., Ltd."),
844 DMI_MATCH(DMI_BOARD_NAME, "D525TUD"),
848 .callback = intel_no_lvds_dmi_callback,
849 .ident = "Supermicro X7SPA-H",
851 DMI_MATCH(DMI_SYS_VENDOR, "Supermicro"),
852 DMI_MATCH(DMI_PRODUCT_NAME, "X7SPA-H"),
856 { } /* terminating entry */
860 * intel_find_lvds_downclock - find the reduced downclock for LVDS in EDID
862 * @connector: LVDS connector
864 * Find the reduced downclock for LVDS in EDID.
866 static void intel_find_lvds_downclock(struct drm_device *dev,
867 struct drm_display_mode *fixed_mode,
868 struct drm_connector *connector)
870 struct drm_i915_private *dev_priv = dev->dev_private;
871 struct drm_display_mode *scan;
874 temp_downclock = fixed_mode->clock;
875 list_for_each_entry(scan, &connector->probed_modes, head) {
877 * If one mode has the same resolution with the fixed_panel
878 * mode while they have the different refresh rate, it means
879 * that the reduced downclock is found for the LVDS. In such
880 * case we can set the different FPx0/1 to dynamically select
881 * between low and high frequency.
883 if (scan->hdisplay == fixed_mode->hdisplay &&
884 scan->hsync_start == fixed_mode->hsync_start &&
885 scan->hsync_end == fixed_mode->hsync_end &&
886 scan->htotal == fixed_mode->htotal &&
887 scan->vdisplay == fixed_mode->vdisplay &&
888 scan->vsync_start == fixed_mode->vsync_start &&
889 scan->vsync_end == fixed_mode->vsync_end &&
890 scan->vtotal == fixed_mode->vtotal) {
891 if (scan->clock < temp_downclock) {
893 * The downclock is already found. But we
894 * expect to find the lower downclock.
896 temp_downclock = scan->clock;
900 if (temp_downclock < fixed_mode->clock && i915_lvds_downclock) {
901 /* We found the downclock for LVDS. */
902 dev_priv->lvds_downclock_avail = 1;
903 dev_priv->lvds_downclock = temp_downclock;
904 DRM_DEBUG_KMS("LVDS downclock is found in EDID. "
905 "Normal clock %dKhz, downclock %dKhz\n",
906 fixed_mode->clock, temp_downclock);
911 * Enumerate the child dev array parsed from VBT to check whether
912 * the LVDS is present.
913 * If it is present, return 1.
914 * If it is not present, return false.
915 * If no child dev is parsed from VBT, it assumes that the LVDS is present.
917 static bool lvds_is_present_in_vbt(struct drm_device *dev,
920 struct drm_i915_private *dev_priv = dev->dev_private;
923 if (!dev_priv->child_dev_num)
926 for (i = 0; i < dev_priv->child_dev_num; i++) {
927 struct child_device_config *child = dev_priv->child_dev + i;
929 /* If the device type is not LFP, continue.
930 * We have to check both the new identifiers as well as the
931 * old for compatibility with some BIOSes.
933 if (child->device_type != DEVICE_TYPE_INT_LFP &&
934 child->device_type != DEVICE_TYPE_LFP)
937 if (intel_gmbus_is_port_valid(child->i2c_pin))
938 *i2c_pin = child->i2c_pin;
940 /* However, we cannot trust the BIOS writers to populate
941 * the VBT correctly. Since LVDS requires additional
942 * information from AIM blocks, a non-zero addin offset is
943 * a good indicator that the LVDS is actually present.
945 if (child->addin_offset)
948 /* But even then some BIOS writers perform some black magic
949 * and instantiate the device without reference to any
950 * additional data. Trust that if the VBT was written into
951 * the OpRegion then they have validated the LVDS's existence.
953 if (dev_priv->opregion.vbt)
960 static int intel_dual_link_lvds_callback(const struct dmi_system_id *id)
962 DRM_INFO("Forcing lvds to dual link mode on %s\n", id->ident);
966 static const struct dmi_system_id intel_dual_link_lvds[] = {
968 .callback = intel_dual_link_lvds_callback,
969 .ident = "Apple MacBook Pro (Core i5/i7 Series)",
971 DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."),
972 DMI_MATCH(DMI_PRODUCT_NAME, "MacBookPro8,2"),
975 { } /* terminating entry */
978 bool intel_is_dual_link_lvds(struct drm_device *dev)
980 struct intel_encoder *encoder;
981 struct intel_lvds_encoder *lvds_encoder;
983 list_for_each_entry(encoder, &dev->mode_config.encoder_list,
985 if (encoder->type == INTEL_OUTPUT_LVDS) {
986 lvds_encoder = to_lvds_encoder(&encoder->base);
988 return lvds_encoder->is_dual_link;
995 static bool compute_is_dual_link_lvds(struct intel_lvds_encoder *lvds_encoder)
997 struct drm_device *dev = lvds_encoder->base.base.dev;
999 struct drm_i915_private *dev_priv = dev->dev_private;
1001 /* use the module option value if specified */
1002 if (i915_lvds_channel_mode > 0)
1003 return i915_lvds_channel_mode == 2;
1005 if (dmi_check_system(intel_dual_link_lvds))
1008 /* BIOS should set the proper LVDS register value at boot, but
1009 * in reality, it doesn't set the value when the lid is closed;
1010 * we need to check "the value to be set" in VBT when LVDS
1011 * register is uninitialized.
1013 val = I915_READ(lvds_encoder->reg);
1014 if (!(val & ~(LVDS_PIPE_MASK | LVDS_DETECTED)))
1015 val = dev_priv->bios_lvds_val;
1017 return (val & LVDS_CLKB_POWER_MASK) == LVDS_CLKB_POWER_UP;
1020 static bool intel_lvds_supported(struct drm_device *dev)
1022 /* With the introduction of the PCH we gained a dedicated
1023 * LVDS presence pin, use it. */
1024 if (HAS_PCH_SPLIT(dev))
1027 /* Otherwise LVDS was only attached to mobile products,
1028 * except for the inglorious 830gm */
1029 return IS_MOBILE(dev) && !IS_I830(dev);
1033 * intel_lvds_init - setup LVDS connectors on this device
1036 * Create the connector, register the LVDS DDC bus, and try to figure out what
1037 * modes we can display on the LVDS panel (if present).
1039 bool intel_lvds_init(struct drm_device *dev)
1041 struct drm_i915_private *dev_priv = dev->dev_private;
1042 struct intel_lvds_encoder *lvds_encoder;
1043 struct intel_encoder *intel_encoder;
1044 struct intel_lvds_connector *lvds_connector;
1045 struct intel_connector *intel_connector;
1046 struct drm_connector *connector;
1047 struct drm_encoder *encoder;
1048 struct drm_display_mode *scan; /* *modes, *bios_mode; */
1049 struct drm_display_mode *fixed_mode = NULL;
1051 struct drm_crtc *crtc;
1056 if (!intel_lvds_supported(dev))
1059 /* Skip init on machines we know falsely report LVDS */
1060 if (dmi_check_system(intel_no_lvds))
1063 pin = GMBUS_PORT_PANEL;
1064 if (!lvds_is_present_in_vbt(dev, &pin)) {
1065 DRM_DEBUG_KMS("LVDS is not present in VBT\n");
1069 if (HAS_PCH_SPLIT(dev)) {
1070 if ((I915_READ(PCH_LVDS) & LVDS_DETECTED) == 0)
1072 if (dev_priv->edp.support) {
1073 DRM_DEBUG_KMS("disable LVDS for eDP support\n");
1078 lvds_encoder = kzalloc(sizeof(struct intel_lvds_encoder), GFP_KERNEL);
1082 lvds_connector = kzalloc(sizeof(struct intel_lvds_connector), GFP_KERNEL);
1083 if (!lvds_connector) {
1084 kfree(lvds_encoder);
1088 lvds_encoder->attached_connector = lvds_connector;
1090 if (!HAS_PCH_SPLIT(dev)) {
1091 lvds_encoder->pfit_control = I915_READ(PFIT_CONTROL);
1094 intel_encoder = &lvds_encoder->base;
1095 encoder = &intel_encoder->base;
1096 intel_connector = &lvds_connector->base;
1097 connector = &intel_connector->base;
1098 drm_connector_init(dev, &intel_connector->base, &intel_lvds_connector_funcs,
1099 DRM_MODE_CONNECTOR_LVDS);
1101 drm_encoder_init(dev, &intel_encoder->base, &intel_lvds_enc_funcs,
1102 DRM_MODE_ENCODER_LVDS);
1104 intel_encoder->enable = intel_enable_lvds;
1105 intel_encoder->pre_pll_enable = intel_pre_pll_enable_lvds;
1106 intel_encoder->disable = intel_disable_lvds;
1107 intel_encoder->get_hw_state = intel_lvds_get_hw_state;
1108 intel_connector->get_hw_state = intel_connector_get_hw_state;
1110 intel_connector_attach_encoder(intel_connector, intel_encoder);
1111 intel_encoder->type = INTEL_OUTPUT_LVDS;
1113 intel_encoder->cloneable = false;
1114 if (HAS_PCH_SPLIT(dev))
1115 intel_encoder->crtc_mask = (1 << 0) | (1 << 1) | (1 << 2);
1116 else if (IS_GEN4(dev))
1117 intel_encoder->crtc_mask = (1 << 0) | (1 << 1);
1119 intel_encoder->crtc_mask = (1 << 1);
1121 drm_encoder_helper_add(encoder, &intel_lvds_helper_funcs);
1122 drm_connector_helper_add(connector, &intel_lvds_connector_helper_funcs);
1123 connector->display_info.subpixel_order = SubPixelHorizontalRGB;
1124 connector->interlace_allowed = false;
1125 connector->doublescan_allowed = false;
1127 if (HAS_PCH_SPLIT(dev)) {
1128 lvds_encoder->reg = PCH_LVDS;
1130 lvds_encoder->reg = LVDS;
1133 /* create the scaling mode property */
1134 drm_mode_create_scaling_mode_property(dev);
1135 drm_object_attach_property(&connector->base,
1136 dev->mode_config.scaling_mode_property,
1137 DRM_MODE_SCALE_ASPECT);
1138 intel_connector->panel.fitting_mode = DRM_MODE_SCALE_ASPECT;
1141 * 1) check for EDID on DDC
1142 * 2) check for VBT data
1143 * 3) check to see if LVDS is already on
1144 * if none of the above, no panel
1145 * 4) make sure lid is open
1146 * if closed, act like it's not there for now
1150 * Attempt to get the fixed panel mode from DDC. Assume that the
1151 * preferred mode is the right one.
1153 edid = drm_get_edid(connector, intel_gmbus_get_adapter(dev_priv, pin));
1155 if (drm_add_edid_modes(connector, edid)) {
1156 drm_mode_connector_update_edid_property(connector,
1160 edid = ERR_PTR(-EINVAL);
1163 edid = ERR_PTR(-ENOENT);
1165 lvds_connector->base.edid = edid;
1167 if (IS_ERR_OR_NULL(edid)) {
1168 /* Didn't get an EDID, so
1169 * Set wide sync ranges so we get all modes
1170 * handed to valid_mode for checking
1172 connector->display_info.min_vfreq = 0;
1173 connector->display_info.max_vfreq = 200;
1174 connector->display_info.min_hfreq = 0;
1175 connector->display_info.max_hfreq = 200;
1178 list_for_each_entry(scan, &connector->probed_modes, head) {
1179 if (scan->type & DRM_MODE_TYPE_PREFERRED) {
1180 DRM_DEBUG_KMS("using preferred mode from EDID: ");
1181 drm_mode_debug_printmodeline(scan);
1183 fixed_mode = drm_mode_duplicate(dev, scan);
1185 intel_find_lvds_downclock(dev, fixed_mode,
1192 /* Failed to get EDID, what about VBT? */
1193 if (dev_priv->lfp_lvds_vbt_mode) {
1194 DRM_DEBUG_KMS("using mode from VBT: ");
1195 drm_mode_debug_printmodeline(dev_priv->lfp_lvds_vbt_mode);
1197 fixed_mode = drm_mode_duplicate(dev, dev_priv->lfp_lvds_vbt_mode);
1199 fixed_mode->type |= DRM_MODE_TYPE_PREFERRED;
1205 * If we didn't get EDID, try checking if the panel is already turned
1206 * on. If so, assume that whatever is currently programmed is the
1210 /* Ironlake: FIXME if still fail, not try pipe mode now */
1211 if (HAS_PCH_SPLIT(dev))
1214 lvds = I915_READ(LVDS);
1215 pipe = (lvds & LVDS_PIPEB_SELECT) ? 1 : 0;
1216 crtc = intel_get_crtc_for_pipe(dev, pipe);
1218 if (crtc && (lvds & LVDS_PORT_EN)) {
1219 fixed_mode = intel_crtc_mode_get(dev, crtc);
1221 DRM_DEBUG_KMS("using current (BIOS) mode: ");
1222 drm_mode_debug_printmodeline(fixed_mode);
1223 fixed_mode->type |= DRM_MODE_TYPE_PREFERRED;
1228 /* If we still don't have a mode after all that, give up. */
1233 lvds_encoder->is_dual_link = compute_is_dual_link_lvds(lvds_encoder);
1234 DRM_DEBUG_KMS("detected %s-link lvds configuration\n",
1235 lvds_encoder->is_dual_link ? "dual" : "single");
1238 * Unlock registers and just
1239 * leave them unlocked
1241 if (HAS_PCH_SPLIT(dev)) {
1242 I915_WRITE(PCH_PP_CONTROL,
1243 I915_READ(PCH_PP_CONTROL) | PANEL_UNLOCK_REGS);
1245 I915_WRITE(PP_CONTROL,
1246 I915_READ(PP_CONTROL) | PANEL_UNLOCK_REGS);
1248 lvds_connector->lid_notifier.notifier_call = intel_lid_notify;
1249 if (acpi_lid_notifier_register(&lvds_connector->lid_notifier)) {
1250 DRM_DEBUG_KMS("lid notifier registration failed\n");
1251 lvds_connector->lid_notifier.notifier_call = NULL;
1253 drm_sysfs_connector_add(connector);
1255 intel_panel_init(&intel_connector->panel, fixed_mode);
1256 intel_panel_setup_backlight(connector);
1261 DRM_DEBUG_KMS("No LVDS modes found, disabling.\n");
1262 drm_connector_cleanup(connector);
1263 drm_encoder_cleanup(encoder);
1265 drm_mode_destroy(dev, fixed_mode);
1266 kfree(lvds_encoder);
1267 kfree(lvds_connector);