2 * Copyright © 2007 David Airlie
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
21 * DEALINGS IN THE SOFTWARE.
27 #include <linux/async.h>
28 #include <linux/module.h>
29 #include <linux/kernel.h>
30 #include <linux/console.h>
31 #include <linux/errno.h>
32 #include <linux/string.h>
34 #include <linux/tty.h>
35 #include <linux/sysrq.h>
36 #include <linux/delay.h>
38 #include <linux/init.h>
39 #include <linux/vga_switcheroo.h>
42 #include <drm/drm_crtc.h>
43 #include <drm/drm_fb_helper.h>
44 #include "intel_drv.h"
45 #include <drm/i915_drm.h>
48 static int intel_fbdev_set_par(struct fb_info *info)
50 struct drm_fb_helper *fb_helper = info->par;
51 struct intel_fbdev *ifbdev =
52 container_of(fb_helper, struct intel_fbdev, helper);
55 ret = drm_fb_helper_set_par(info);
59 * FIXME: fbdev presumes that all callbacks also work from
60 * atomic contexts and relies on that for emergency oops
61 * printing. KMS totally doesn't do that and the locking here is
62 * by far not the only place this goes wrong. Ignore this for
63 * now until we solve this for real.
65 mutex_lock(&fb_helper->dev->struct_mutex);
66 ret = i915_gem_object_set_to_gtt_domain(ifbdev->fb->obj,
68 mutex_unlock(&fb_helper->dev->struct_mutex);
74 static int intel_fbdev_blank(int blank, struct fb_info *info)
76 struct drm_fb_helper *fb_helper = info->par;
77 struct intel_fbdev *ifbdev =
78 container_of(fb_helper, struct intel_fbdev, helper);
81 ret = drm_fb_helper_blank(blank, info);
85 * FIXME: fbdev presumes that all callbacks also work from
86 * atomic contexts and relies on that for emergency oops
87 * printing. KMS totally doesn't do that and the locking here is
88 * by far not the only place this goes wrong. Ignore this for
89 * now until we solve this for real.
91 mutex_lock(&fb_helper->dev->struct_mutex);
92 intel_fb_obj_invalidate(ifbdev->fb->obj, NULL, ORIGIN_GTT);
93 mutex_unlock(&fb_helper->dev->struct_mutex);
99 static int intel_fbdev_pan_display(struct fb_var_screeninfo *var,
100 struct fb_info *info)
102 struct drm_fb_helper *fb_helper = info->par;
103 struct intel_fbdev *ifbdev =
104 container_of(fb_helper, struct intel_fbdev, helper);
107 ret = drm_fb_helper_pan_display(var, info);
111 * FIXME: fbdev presumes that all callbacks also work from
112 * atomic contexts and relies on that for emergency oops
113 * printing. KMS totally doesn't do that and the locking here is
114 * by far not the only place this goes wrong. Ignore this for
115 * now until we solve this for real.
117 mutex_lock(&fb_helper->dev->struct_mutex);
118 intel_fb_obj_invalidate(ifbdev->fb->obj, NULL, ORIGIN_GTT);
119 mutex_unlock(&fb_helper->dev->struct_mutex);
125 static struct fb_ops intelfb_ops = {
126 .owner = THIS_MODULE,
127 .fb_check_var = drm_fb_helper_check_var,
128 .fb_set_par = intel_fbdev_set_par,
129 .fb_fillrect = cfb_fillrect,
130 .fb_copyarea = cfb_copyarea,
131 .fb_imageblit = cfb_imageblit,
132 .fb_pan_display = intel_fbdev_pan_display,
133 .fb_blank = intel_fbdev_blank,
134 .fb_setcmap = drm_fb_helper_setcmap,
135 .fb_debug_enter = drm_fb_helper_debug_enter,
136 .fb_debug_leave = drm_fb_helper_debug_leave,
139 static int intelfb_alloc(struct drm_fb_helper *helper,
140 struct drm_fb_helper_surface_size *sizes)
142 struct intel_fbdev *ifbdev =
143 container_of(helper, struct intel_fbdev, helper);
144 struct drm_framebuffer *fb;
145 struct drm_device *dev = helper->dev;
146 struct drm_mode_fb_cmd2 mode_cmd = {};
147 struct drm_i915_gem_object *obj;
150 /* we don't do packed 24bpp */
151 if (sizes->surface_bpp == 24)
152 sizes->surface_bpp = 32;
154 mode_cmd.width = sizes->surface_width;
155 mode_cmd.height = sizes->surface_height;
157 mode_cmd.pitches[0] = ALIGN(mode_cmd.width *
158 DIV_ROUND_UP(sizes->surface_bpp, 8), 64);
159 mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp,
160 sizes->surface_depth);
162 size = mode_cmd.pitches[0] * mode_cmd.height;
163 size = PAGE_ALIGN(size);
164 obj = i915_gem_object_create_stolen(dev, size);
166 obj = i915_gem_alloc_object(dev, size);
168 DRM_ERROR("failed to allocate framebuffer\n");
173 fb = __intel_framebuffer_create(dev, &mode_cmd, obj);
179 /* Flush everything out, we'll be doing GTT only from now on */
180 ret = intel_pin_and_fence_fb_obj(NULL, fb, NULL, NULL);
182 DRM_ERROR("failed to pin obj: %d\n", ret);
186 ifbdev->fb = to_intel_framebuffer(fb);
191 drm_framebuffer_remove(fb);
193 drm_gem_object_unreference(&obj->base);
198 static int intelfb_create(struct drm_fb_helper *helper,
199 struct drm_fb_helper_surface_size *sizes)
201 struct intel_fbdev *ifbdev =
202 container_of(helper, struct intel_fbdev, helper);
203 struct intel_framebuffer *intel_fb = ifbdev->fb;
204 struct drm_device *dev = helper->dev;
205 struct drm_i915_private *dev_priv = dev->dev_private;
206 struct fb_info *info;
207 struct drm_framebuffer *fb;
208 struct drm_i915_gem_object *obj;
210 bool prealloc = false;
212 mutex_lock(&dev->struct_mutex);
215 (sizes->fb_width > intel_fb->base.width ||
216 sizes->fb_height > intel_fb->base.height)) {
217 DRM_DEBUG_KMS("BIOS fb too small (%dx%d), we require (%dx%d),"
219 intel_fb->base.width, intel_fb->base.height,
220 sizes->fb_width, sizes->fb_height);
221 drm_framebuffer_unreference(&intel_fb->base);
222 intel_fb = ifbdev->fb = NULL;
224 if (!intel_fb || WARN_ON(!intel_fb->obj)) {
225 DRM_DEBUG_KMS("no BIOS fb, allocating a new one\n");
226 ret = intelfb_alloc(helper, sizes);
229 intel_fb = ifbdev->fb;
231 DRM_DEBUG_KMS("re-using BIOS fb\n");
233 sizes->fb_width = intel_fb->base.width;
234 sizes->fb_height = intel_fb->base.height;
238 size = obj->base.size;
240 info = framebuffer_alloc(0, &dev->pdev->dev);
248 fb = &ifbdev->fb->base;
250 ifbdev->helper.fb = fb;
251 ifbdev->helper.fbdev = info;
253 strcpy(info->fix.id, "inteldrmfb");
255 info->flags = FBINFO_DEFAULT | FBINFO_CAN_FORCE_OUTPUT;
256 info->fbops = &intelfb_ops;
258 ret = fb_alloc_cmap(&info->cmap, 256, 0);
263 /* setup aperture base/size for vesafb takeover */
264 info->apertures = alloc_apertures(1);
265 if (!info->apertures) {
269 info->apertures->ranges[0].base = dev->mode_config.fb_base;
270 info->apertures->ranges[0].size = dev_priv->gtt.mappable_end;
272 info->fix.smem_start = dev->mode_config.fb_base + i915_gem_obj_ggtt_offset(obj);
273 info->fix.smem_len = size;
276 ioremap_wc(dev_priv->gtt.mappable_base + i915_gem_obj_ggtt_offset(obj),
278 if (!info->screen_base) {
282 info->screen_size = size;
284 /* This driver doesn't need a VT switch to restore the mode on resume */
285 info->skip_vt_switch = true;
287 drm_fb_helper_fill_fix(info, fb->pitches[0], fb->depth);
288 drm_fb_helper_fill_var(info, &ifbdev->helper, sizes->fb_width, sizes->fb_height);
290 /* If the object is shmemfs backed, it will have given us zeroed pages.
291 * If the object is stolen however, it will be full of whatever
292 * garbage was left in there.
294 if (ifbdev->fb->obj->stolen && !prealloc)
295 memset_io(info->screen_base, 0, info->screen_size);
297 /* Use default scratch pixmap (info->pixmap.flags = FB_PIXMAP_SYSTEM) */
299 DRM_DEBUG_KMS("allocated %dx%d fb: 0x%08lx, bo %p\n",
300 fb->width, fb->height,
301 i915_gem_obj_ggtt_offset(obj), obj);
303 mutex_unlock(&dev->struct_mutex);
304 vga_switcheroo_client_fb_set(dev->pdev, info);
308 i915_gem_object_ggtt_unpin(obj);
309 drm_gem_object_unreference(&obj->base);
311 mutex_unlock(&dev->struct_mutex);
315 /** Sets the color ramps on behalf of RandR */
316 static void intel_crtc_fb_gamma_set(struct drm_crtc *crtc, u16 red, u16 green,
319 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
321 intel_crtc->lut_r[regno] = red >> 8;
322 intel_crtc->lut_g[regno] = green >> 8;
323 intel_crtc->lut_b[regno] = blue >> 8;
326 static void intel_crtc_fb_gamma_get(struct drm_crtc *crtc, u16 *red, u16 *green,
327 u16 *blue, int regno)
329 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
331 *red = intel_crtc->lut_r[regno] << 8;
332 *green = intel_crtc->lut_g[regno] << 8;
333 *blue = intel_crtc->lut_b[regno] << 8;
336 static struct drm_fb_helper_crtc *
337 intel_fb_helper_crtc(struct drm_fb_helper *fb_helper, struct drm_crtc *crtc)
341 for (i = 0; i < fb_helper->crtc_count; i++)
342 if (fb_helper->crtc_info[i].mode_set.crtc == crtc)
343 return &fb_helper->crtc_info[i];
349 * Try to read the BIOS display configuration and use it for the initial
352 * The BIOS or boot loader will generally create an initial display
353 * configuration for us that includes some set of active pipes and displays.
354 * This routine tries to figure out which pipes and connectors are active
355 * and stuffs them into the crtcs and modes array given to us by the
356 * drm_fb_helper code.
358 * The overall sequence is:
359 * intel_fbdev_init - from driver load
360 * intel_fbdev_init_bios - initialize the intel_fbdev using BIOS data
361 * drm_fb_helper_init - build fb helper structs
362 * drm_fb_helper_single_add_all_connectors - more fb helper structs
363 * intel_fbdev_initial_config - apply the config
364 * drm_fb_helper_initial_config - call ->probe then register_framebuffer()
365 * drm_setup_crtcs - build crtc config for fbdev
366 * intel_fb_initial_config - find active connectors etc
367 * drm_fb_helper_single_fb_probe - set up fbdev
368 * intelfb_create - re-use or alloc fb, build out fbdev structs
370 * Note that we don't make special consideration whether we could actually
371 * switch to the selected modes without a full modeset. E.g. when the display
372 * is in VGA mode we need to recalculate watermarks and set a new high-res
373 * framebuffer anyway.
375 static bool intel_fb_initial_config(struct drm_fb_helper *fb_helper,
376 struct drm_fb_helper_crtc **crtcs,
377 struct drm_display_mode **modes,
378 struct drm_fb_offset *offsets,
379 bool *enabled, int width, int height)
381 struct drm_device *dev = fb_helper->dev;
384 bool fallback = true;
385 int num_connectors_enabled = 0;
386 int num_connectors_detected = 0;
387 uint64_t conn_configured = 0, mask;
390 save_enabled = kcalloc(dev->mode_config.num_connector, sizeof(bool),
395 memcpy(save_enabled, enabled, dev->mode_config.num_connector);
396 mask = (1 << fb_helper->connector_count) - 1;
398 for (i = 0; i < fb_helper->connector_count; i++) {
399 struct drm_fb_helper_connector *fb_conn;
400 struct drm_connector *connector;
401 struct drm_encoder *encoder;
402 struct drm_fb_helper_crtc *new_crtc;
404 fb_conn = fb_helper->connector_info[i];
405 connector = fb_conn->connector;
407 if (conn_configured & (1 << i))
410 if (pass == 0 && !connector->has_tile)
413 if (connector->status == connector_status_connected)
414 num_connectors_detected++;
417 DRM_DEBUG_KMS("connector %s not enabled, skipping\n",
419 conn_configured |= (1 << i);
423 if (connector->force == DRM_FORCE_OFF) {
424 DRM_DEBUG_KMS("connector %s is disabled by user, skipping\n",
430 encoder = connector->encoder;
431 if (!encoder || WARN_ON(!encoder->crtc)) {
432 if (connector->force > DRM_FORCE_OFF)
435 DRM_DEBUG_KMS("connector %s has no encoder or crtc, skipping\n",
438 conn_configured |= (1 << i);
442 num_connectors_enabled++;
444 new_crtc = intel_fb_helper_crtc(fb_helper, encoder->crtc);
447 * Make sure we're not trying to drive multiple connectors
448 * with a single CRTC, since our cloning support may not
451 for (j = 0; j < fb_helper->connector_count; j++) {
452 if (crtcs[j] == new_crtc) {
453 DRM_DEBUG_KMS("fallback: cloned configuration\n");
458 DRM_DEBUG_KMS("looking for cmdline mode on connector %s\n",
461 /* go for command line mode first */
462 modes[i] = drm_pick_cmdline_mode(fb_conn, width, height);
464 /* try for preferred next */
466 DRM_DEBUG_KMS("looking for preferred mode on connector %s %d\n",
467 connector->name, connector->has_tile);
468 modes[i] = drm_has_preferred_mode(fb_conn, width,
472 /* No preferred mode marked by the EDID? Are there any modes? */
473 if (!modes[i] && !list_empty(&connector->modes)) {
474 DRM_DEBUG_KMS("using first mode listed on connector %s\n",
476 modes[i] = list_first_entry(&connector->modes,
477 struct drm_display_mode,
481 /* last resort: use current mode */
484 * IMPORTANT: We want to use the adjusted mode (i.e.
485 * after the panel fitter upscaling) as the initial
486 * config, not the input mode, which is what crtc->mode
487 * usually contains. But since our current fastboot
488 * code puts a mode derived from the post-pfit timings
489 * into crtc->mode this works out correctly. We don't
490 * use hwmode anywhere right now, so use it for this
491 * since the fb helper layer wants a pointer to
494 DRM_DEBUG_KMS("looking for current mode on connector %s\n",
496 intel_mode_from_pipe_config(&encoder->crtc->hwmode,
497 to_intel_crtc(encoder->crtc)->config);
498 modes[i] = &encoder->crtc->hwmode;
502 DRM_DEBUG_KMS("connector %s on pipe %c [CRTC:%d]: %dx%d%s\n",
504 pipe_name(to_intel_crtc(encoder->crtc)->pipe),
505 encoder->crtc->base.id,
506 modes[i]->hdisplay, modes[i]->vdisplay,
507 modes[i]->flags & DRM_MODE_FLAG_INTERLACE ? "i" :"");
510 conn_configured |= (1 << i);
513 if ((conn_configured & mask) != mask) {
519 * If the BIOS didn't enable everything it could, fall back to have the
520 * same user experiencing of lighting up as much as possible like the
521 * fbdev helper library.
523 if (num_connectors_enabled != num_connectors_detected &&
524 num_connectors_enabled < INTEL_INFO(dev)->num_pipes) {
525 DRM_DEBUG_KMS("fallback: Not all outputs enabled\n");
526 DRM_DEBUG_KMS("Enabled: %i, detected: %i\n", num_connectors_enabled,
527 num_connectors_detected);
533 DRM_DEBUG_KMS("Not using firmware configuration\n");
534 memcpy(enabled, save_enabled, dev->mode_config.num_connector);
543 static const struct drm_fb_helper_funcs intel_fb_helper_funcs = {
544 .initial_config = intel_fb_initial_config,
545 .gamma_set = intel_crtc_fb_gamma_set,
546 .gamma_get = intel_crtc_fb_gamma_get,
547 .fb_probe = intelfb_create,
550 static void intel_fbdev_destroy(struct drm_device *dev,
551 struct intel_fbdev *ifbdev)
553 if (ifbdev->helper.fbdev) {
554 struct fb_info *info = ifbdev->helper.fbdev;
556 unregister_framebuffer(info);
557 iounmap(info->screen_base);
559 fb_dealloc_cmap(&info->cmap);
561 framebuffer_release(info);
564 drm_fb_helper_fini(&ifbdev->helper);
566 drm_framebuffer_unregister_private(&ifbdev->fb->base);
567 drm_framebuffer_remove(&ifbdev->fb->base);
571 * Build an intel_fbdev struct using a BIOS allocated framebuffer, if possible.
572 * The core display code will have read out the current plane configuration,
573 * so we use that to figure out if there's an object for us to use as the
574 * fb, and if so, we re-use it for the fbdev configuration.
576 * Note we only support a single fb shared across pipes for boot (mostly for
577 * fbcon), so we just find the biggest and use that.
579 static bool intel_fbdev_init_bios(struct drm_device *dev,
580 struct intel_fbdev *ifbdev)
582 struct intel_framebuffer *fb = NULL;
583 struct drm_crtc *crtc;
584 struct intel_crtc *intel_crtc;
585 struct intel_initial_plane_config *plane_config = NULL;
586 unsigned int max_size = 0;
591 /* Find the largest fb */
592 for_each_crtc(dev, crtc) {
593 intel_crtc = to_intel_crtc(crtc);
595 if (!intel_crtc->active || !crtc->primary->fb) {
596 DRM_DEBUG_KMS("pipe %c not active or no fb, skipping\n",
597 pipe_name(intel_crtc->pipe));
601 if (intel_crtc->plane_config.size > max_size) {
602 DRM_DEBUG_KMS("found possible fb from plane %c\n",
603 pipe_name(intel_crtc->pipe));
604 plane_config = &intel_crtc->plane_config;
605 fb = to_intel_framebuffer(crtc->primary->fb);
606 max_size = plane_config->size;
611 DRM_DEBUG_KMS("no active fbs found, not using BIOS config\n");
615 /* Now make sure all the pipes will fit into it */
616 for_each_crtc(dev, crtc) {
617 unsigned int cur_size;
619 intel_crtc = to_intel_crtc(crtc);
621 if (!intel_crtc->active) {
622 DRM_DEBUG_KMS("pipe %c not active, skipping\n",
623 pipe_name(intel_crtc->pipe));
627 DRM_DEBUG_KMS("checking plane %c for BIOS fb\n",
628 pipe_name(intel_crtc->pipe));
631 * See if the plane fb we found above will fit on this
632 * pipe. Note we need to use the selected fb's pitch and bpp
633 * rather than the current pipe's, since they differ.
635 cur_size = intel_crtc->config->base.adjusted_mode.crtc_hdisplay;
636 cur_size = cur_size * fb->base.bits_per_pixel / 8;
637 if (fb->base.pitches[0] < cur_size) {
638 DRM_DEBUG_KMS("fb not wide enough for plane %c (%d vs %d)\n",
639 pipe_name(intel_crtc->pipe),
640 cur_size, fb->base.pitches[0]);
646 cur_size = intel_crtc->config->base.adjusted_mode.crtc_vdisplay;
647 cur_size = intel_fb_align_height(dev, cur_size,
648 fb->base.pixel_format,
649 fb->base.modifier[0]);
650 cur_size *= fb->base.pitches[0];
651 DRM_DEBUG_KMS("pipe %c area: %dx%d, bpp: %d, size: %d\n",
652 pipe_name(intel_crtc->pipe),
653 intel_crtc->config->base.adjusted_mode.crtc_hdisplay,
654 intel_crtc->config->base.adjusted_mode.crtc_vdisplay,
655 fb->base.bits_per_pixel,
658 if (cur_size > max_size) {
659 DRM_DEBUG_KMS("fb not big enough for plane %c (%d vs %d)\n",
660 pipe_name(intel_crtc->pipe),
667 DRM_DEBUG_KMS("fb big enough for plane %c (%d >= %d)\n",
668 pipe_name(intel_crtc->pipe),
673 DRM_DEBUG_KMS("BIOS fb not suitable for all pipes, not using\n");
677 ifbdev->preferred_bpp = fb->base.bits_per_pixel;
680 drm_framebuffer_reference(&ifbdev->fb->base);
682 /* Final pass to check if any active pipes don't have fbs */
683 for_each_crtc(dev, crtc) {
684 intel_crtc = to_intel_crtc(crtc);
686 if (!intel_crtc->active)
689 WARN(!crtc->primary->fb,
690 "re-used BIOS config but lost an fb on crtc %d\n",
695 DRM_DEBUG_KMS("using BIOS fb for initial console\n");
703 static void intel_fbdev_suspend_worker(struct work_struct *work)
705 intel_fbdev_set_suspend(container_of(work,
706 struct drm_i915_private,
707 fbdev_suspend_work)->dev,
708 FBINFO_STATE_RUNNING,
712 int intel_fbdev_init(struct drm_device *dev)
714 struct intel_fbdev *ifbdev;
715 struct drm_i915_private *dev_priv = dev->dev_private;
718 if (WARN_ON(INTEL_INFO(dev)->num_pipes == 0))
721 ifbdev = kzalloc(sizeof(struct intel_fbdev), GFP_KERNEL);
725 drm_fb_helper_prepare(dev, &ifbdev->helper, &intel_fb_helper_funcs);
727 if (!intel_fbdev_init_bios(dev, ifbdev))
728 ifbdev->preferred_bpp = 32;
730 ret = drm_fb_helper_init(dev, &ifbdev->helper,
731 INTEL_INFO(dev)->num_pipes, 4);
737 dev_priv->fbdev = ifbdev;
738 INIT_WORK(&dev_priv->fbdev_suspend_work, intel_fbdev_suspend_worker);
740 drm_fb_helper_single_add_all_connectors(&ifbdev->helper);
745 void intel_fbdev_initial_config(void *data, async_cookie_t cookie)
747 struct drm_i915_private *dev_priv = data;
748 struct intel_fbdev *ifbdev = dev_priv->fbdev;
750 /* Due to peculiar init order wrt to hpd handling this is separate. */
751 drm_fb_helper_initial_config(&ifbdev->helper, ifbdev->preferred_bpp);
754 void intel_fbdev_fini(struct drm_device *dev)
756 struct drm_i915_private *dev_priv = dev->dev_private;
757 if (!dev_priv->fbdev)
760 flush_work(&dev_priv->fbdev_suspend_work);
762 async_synchronize_full();
763 intel_fbdev_destroy(dev, dev_priv->fbdev);
764 kfree(dev_priv->fbdev);
765 dev_priv->fbdev = NULL;
768 void intel_fbdev_set_suspend(struct drm_device *dev, int state, bool synchronous)
770 struct drm_i915_private *dev_priv = dev->dev_private;
771 struct intel_fbdev *ifbdev = dev_priv->fbdev;
772 struct fb_info *info;
777 info = ifbdev->helper.fbdev;
780 /* Flush any pending work to turn the console on, and then
781 * wait to turn it off. It must be synchronous as we are
782 * about to suspend or unload the driver.
784 * Note that from within the work-handler, we cannot flush
785 * ourselves, so only flush outstanding work upon suspend!
787 if (state != FBINFO_STATE_RUNNING)
788 flush_work(&dev_priv->fbdev_suspend_work);
792 * The console lock can be pretty contented on resume due
793 * to all the printk activity. Try to keep it out of the hot
794 * path of resume if possible.
796 WARN_ON(state != FBINFO_STATE_RUNNING);
797 if (!console_trylock()) {
798 /* Don't block our own workqueue as this can
799 * be run in parallel with other i915.ko tasks.
801 schedule_work(&dev_priv->fbdev_suspend_work);
806 /* On resume from hibernation: If the object is shmemfs backed, it has
807 * been restored from swap. If the object is stolen however, it will be
808 * full of whatever garbage was left in there.
810 if (state == FBINFO_STATE_RUNNING && ifbdev->fb->obj->stolen)
811 memset_io(info->screen_base, 0, info->screen_size);
813 fb_set_suspend(info, state);
817 void intel_fbdev_output_poll_changed(struct drm_device *dev)
819 struct drm_i915_private *dev_priv = dev->dev_private;
821 drm_fb_helper_hotplug_event(&dev_priv->fbdev->helper);
824 void intel_fbdev_restore_mode(struct drm_device *dev)
827 struct drm_i915_private *dev_priv = dev->dev_private;
829 if (!dev_priv->fbdev)
832 ret = drm_fb_helper_restore_fbdev_mode_unlocked(&dev_priv->fbdev->helper);
834 DRM_DEBUG("failed to restore crtc mode\n");