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>
37 #include <linux/init.h>
38 #include <linux/vga_switcheroo.h>
41 #include <drm/drm_crtc.h>
42 #include <drm/drm_fb_helper.h>
43 #include "intel_drv.h"
44 #include "intel_frontbuffer.h"
45 #include <drm/i915_drm.h>
48 static void intel_fbdev_invalidate(struct intel_fbdev *ifbdev)
50 struct drm_i915_gem_object *obj = intel_fb_obj(&ifbdev->fb->base);
52 ifbdev->vma_flags & PLANE_HAS_FENCE ? ORIGIN_GTT : ORIGIN_CPU;
54 intel_fb_obj_invalidate(obj, origin);
57 static int intel_fbdev_set_par(struct fb_info *info)
59 struct drm_fb_helper *fb_helper = info->par;
60 struct intel_fbdev *ifbdev =
61 container_of(fb_helper, struct intel_fbdev, helper);
64 ret = drm_fb_helper_set_par(info);
66 intel_fbdev_invalidate(ifbdev);
71 static int intel_fbdev_blank(int blank, struct fb_info *info)
73 struct drm_fb_helper *fb_helper = info->par;
74 struct intel_fbdev *ifbdev =
75 container_of(fb_helper, struct intel_fbdev, helper);
78 ret = drm_fb_helper_blank(blank, info);
80 intel_fbdev_invalidate(ifbdev);
85 static int intel_fbdev_pan_display(struct fb_var_screeninfo *var,
88 struct drm_fb_helper *fb_helper = info->par;
89 struct intel_fbdev *ifbdev =
90 container_of(fb_helper, struct intel_fbdev, helper);
93 ret = drm_fb_helper_pan_display(var, info);
95 intel_fbdev_invalidate(ifbdev);
100 static struct fb_ops intelfb_ops = {
101 .owner = THIS_MODULE,
102 DRM_FB_HELPER_DEFAULT_OPS,
103 .fb_set_par = intel_fbdev_set_par,
104 .fb_fillrect = drm_fb_helper_cfb_fillrect,
105 .fb_copyarea = drm_fb_helper_cfb_copyarea,
106 .fb_imageblit = drm_fb_helper_cfb_imageblit,
107 .fb_pan_display = intel_fbdev_pan_display,
108 .fb_blank = intel_fbdev_blank,
111 static int intelfb_alloc(struct drm_fb_helper *helper,
112 struct drm_fb_helper_surface_size *sizes)
114 struct intel_fbdev *ifbdev =
115 container_of(helper, struct intel_fbdev, helper);
116 struct drm_framebuffer *fb;
117 struct drm_device *dev = helper->dev;
118 struct drm_i915_private *dev_priv = to_i915(dev);
119 struct drm_mode_fb_cmd2 mode_cmd = {};
120 struct drm_i915_gem_object *obj;
123 /* we don't do packed 24bpp */
124 if (sizes->surface_bpp == 24)
125 sizes->surface_bpp = 32;
127 mode_cmd.width = sizes->surface_width;
128 mode_cmd.height = sizes->surface_height;
130 mode_cmd.pitches[0] = ALIGN(mode_cmd.width *
131 DIV_ROUND_UP(sizes->surface_bpp, 8), 64);
132 mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp,
133 sizes->surface_depth);
135 size = mode_cmd.pitches[0] * mode_cmd.height;
136 size = PAGE_ALIGN(size);
138 /* If the FB is too big, just don't use it since fbdev is not very
139 * important and we should probably use that space with FBC or other
142 if (size * 2 < dev_priv->stolen_usable_size)
143 obj = i915_gem_object_create_stolen(dev_priv, size);
145 obj = i915_gem_object_create(dev_priv, size);
147 DRM_ERROR("failed to allocate framebuffer\n");
152 fb = intel_framebuffer_create(obj, &mode_cmd);
158 ifbdev->fb = to_intel_framebuffer(fb);
163 i915_gem_object_put(obj);
168 static int intelfb_create(struct drm_fb_helper *helper,
169 struct drm_fb_helper_surface_size *sizes)
171 struct intel_fbdev *ifbdev =
172 container_of(helper, struct intel_fbdev, helper);
173 struct intel_framebuffer *intel_fb = ifbdev->fb;
174 struct drm_device *dev = helper->dev;
175 struct drm_i915_private *dev_priv = to_i915(dev);
176 struct pci_dev *pdev = dev_priv->drm.pdev;
177 struct i915_ggtt *ggtt = &dev_priv->ggtt;
178 const struct i915_ggtt_view view = {
179 .type = I915_GGTT_VIEW_NORMAL,
181 struct fb_info *info;
182 struct drm_framebuffer *fb;
183 struct i915_vma *vma;
184 unsigned long flags = 0;
185 bool prealloc = false;
190 (sizes->fb_width > intel_fb->base.width ||
191 sizes->fb_height > intel_fb->base.height)) {
192 DRM_DEBUG_KMS("BIOS fb too small (%dx%d), we require (%dx%d),"
194 intel_fb->base.width, intel_fb->base.height,
195 sizes->fb_width, sizes->fb_height);
196 drm_framebuffer_put(&intel_fb->base);
197 intel_fb = ifbdev->fb = NULL;
199 if (!intel_fb || WARN_ON(!intel_fb_obj(&intel_fb->base))) {
200 DRM_DEBUG_KMS("no BIOS fb, allocating a new one\n");
201 ret = intelfb_alloc(helper, sizes);
204 intel_fb = ifbdev->fb;
206 DRM_DEBUG_KMS("re-using BIOS fb\n");
208 sizes->fb_width = intel_fb->base.width;
209 sizes->fb_height = intel_fb->base.height;
212 mutex_lock(&dev->struct_mutex);
213 intel_runtime_pm_get(dev_priv);
215 /* Pin the GGTT vma for our access via info->screen_base.
216 * This also validates that any existing fb inherited from the
217 * BIOS is suitable for own access.
219 vma = intel_pin_and_fence_fb_obj(&ifbdev->fb->base,
220 &view, false, &flags);
226 fb = &ifbdev->fb->base;
227 intel_fb_obj_flush(intel_fb_obj(fb), ORIGIN_DIRTYFB);
229 info = drm_fb_helper_alloc_fbi(helper);
231 DRM_ERROR("Failed to allocate fb_info\n");
238 ifbdev->helper.fb = fb;
240 strcpy(info->fix.id, "inteldrmfb");
242 info->fbops = &intelfb_ops;
244 /* setup aperture base/size for vesafb takeover */
245 info->apertures->ranges[0].base = dev->mode_config.fb_base;
246 info->apertures->ranges[0].size = ggtt->mappable_end;
248 info->fix.smem_start = dev->mode_config.fb_base + i915_ggtt_offset(vma);
249 info->fix.smem_len = vma->node.size;
251 vaddr = i915_vma_pin_iomap(vma);
253 DRM_ERROR("Failed to remap framebuffer into virtual memory\n");
254 ret = PTR_ERR(vaddr);
257 info->screen_base = vaddr;
258 info->screen_size = vma->node.size;
260 /* This driver doesn't need a VT switch to restore the mode on resume */
261 info->skip_vt_switch = true;
263 drm_fb_helper_fill_fix(info, fb->pitches[0], fb->format->depth);
264 drm_fb_helper_fill_var(info, &ifbdev->helper, sizes->fb_width, sizes->fb_height);
266 /* If the object is shmemfs backed, it will have given us zeroed pages.
267 * If the object is stolen however, it will be full of whatever
268 * garbage was left in there.
270 if (intel_fb_obj(fb)->stolen && !prealloc)
271 memset_io(info->screen_base, 0, info->screen_size);
273 /* Use default scratch pixmap (info->pixmap.flags = FB_PIXMAP_SYSTEM) */
275 DRM_DEBUG_KMS("allocated %dx%d fb: 0x%08x\n",
276 fb->width, fb->height, i915_ggtt_offset(vma));
278 ifbdev->vma_flags = flags;
280 intel_runtime_pm_put(dev_priv);
281 mutex_unlock(&dev->struct_mutex);
282 vga_switcheroo_client_fb_set(pdev, info);
286 intel_unpin_fb_vma(vma, flags);
288 intel_runtime_pm_put(dev_priv);
289 mutex_unlock(&dev->struct_mutex);
293 static struct drm_fb_helper_crtc *
294 intel_fb_helper_crtc(struct drm_fb_helper *fb_helper, struct drm_crtc *crtc)
298 for (i = 0; i < fb_helper->crtc_count; i++)
299 if (fb_helper->crtc_info[i].mode_set.crtc == crtc)
300 return &fb_helper->crtc_info[i];
306 * Try to read the BIOS display configuration and use it for the initial
309 * The BIOS or boot loader will generally create an initial display
310 * configuration for us that includes some set of active pipes and displays.
311 * This routine tries to figure out which pipes and connectors are active
312 * and stuffs them into the crtcs and modes array given to us by the
313 * drm_fb_helper code.
315 * The overall sequence is:
316 * intel_fbdev_init - from driver load
317 * intel_fbdev_init_bios - initialize the intel_fbdev using BIOS data
318 * drm_fb_helper_init - build fb helper structs
319 * drm_fb_helper_single_add_all_connectors - more fb helper structs
320 * intel_fbdev_initial_config - apply the config
321 * drm_fb_helper_initial_config - call ->probe then register_framebuffer()
322 * drm_setup_crtcs - build crtc config for fbdev
323 * intel_fb_initial_config - find active connectors etc
324 * drm_fb_helper_single_fb_probe - set up fbdev
325 * intelfb_create - re-use or alloc fb, build out fbdev structs
327 * Note that we don't make special consideration whether we could actually
328 * switch to the selected modes without a full modeset. E.g. when the display
329 * is in VGA mode we need to recalculate watermarks and set a new high-res
330 * framebuffer anyway.
332 static bool intel_fb_initial_config(struct drm_fb_helper *fb_helper,
333 struct drm_fb_helper_crtc **crtcs,
334 struct drm_display_mode **modes,
335 struct drm_fb_offset *offsets,
336 bool *enabled, int width, int height)
338 struct drm_i915_private *dev_priv = to_i915(fb_helper->dev);
339 unsigned long conn_configured, conn_seq, mask;
340 unsigned int count = min(fb_helper->connector_count, BITS_PER_LONG);
343 bool fallback = true, ret = true;
344 int num_connectors_enabled = 0;
345 int num_connectors_detected = 0;
346 struct drm_modeset_acquire_ctx ctx;
348 save_enabled = kcalloc(count, sizeof(bool), GFP_KERNEL);
352 drm_modeset_acquire_init(&ctx, 0);
354 while (drm_modeset_lock_all_ctx(fb_helper->dev, &ctx) != 0)
355 drm_modeset_backoff(&ctx);
357 memcpy(save_enabled, enabled, count);
358 mask = GENMASK(count - 1, 0);
361 conn_seq = conn_configured;
362 for (i = 0; i < count; i++) {
363 struct drm_fb_helper_connector *fb_conn;
364 struct drm_connector *connector;
365 struct drm_encoder *encoder;
366 struct drm_fb_helper_crtc *new_crtc;
368 fb_conn = fb_helper->connector_info[i];
369 connector = fb_conn->connector;
371 if (conn_configured & BIT(i))
374 if (conn_seq == 0 && !connector->has_tile)
377 if (connector->status == connector_status_connected)
378 num_connectors_detected++;
381 DRM_DEBUG_KMS("connector %s not enabled, skipping\n",
383 conn_configured |= BIT(i);
387 if (connector->force == DRM_FORCE_OFF) {
388 DRM_DEBUG_KMS("connector %s is disabled by user, skipping\n",
394 encoder = connector->state->best_encoder;
395 if (!encoder || WARN_ON(!connector->state->crtc)) {
396 if (connector->force > DRM_FORCE_OFF)
399 DRM_DEBUG_KMS("connector %s has no encoder or crtc, skipping\n",
402 conn_configured |= BIT(i);
406 num_connectors_enabled++;
408 new_crtc = intel_fb_helper_crtc(fb_helper,
409 connector->state->crtc);
412 * Make sure we're not trying to drive multiple connectors
413 * with a single CRTC, since our cloning support may not
416 for (j = 0; j < count; j++) {
417 if (crtcs[j] == new_crtc) {
418 DRM_DEBUG_KMS("fallback: cloned configuration\n");
423 DRM_DEBUG_KMS("looking for cmdline mode on connector %s\n",
426 /* go for command line mode first */
427 modes[i] = drm_pick_cmdline_mode(fb_conn);
429 /* try for preferred next */
431 DRM_DEBUG_KMS("looking for preferred mode on connector %s %d\n",
432 connector->name, connector->has_tile);
433 modes[i] = drm_has_preferred_mode(fb_conn, width,
437 /* No preferred mode marked by the EDID? Are there any modes? */
438 if (!modes[i] && !list_empty(&connector->modes)) {
439 DRM_DEBUG_KMS("using first mode listed on connector %s\n",
441 modes[i] = list_first_entry(&connector->modes,
442 struct drm_display_mode,
446 /* last resort: use current mode */
449 * IMPORTANT: We want to use the adjusted mode (i.e.
450 * after the panel fitter upscaling) as the initial
451 * config, not the input mode, which is what crtc->mode
452 * usually contains. But since our current
453 * code puts a mode derived from the post-pfit timings
454 * into crtc->mode this works out correctly.
456 * This is crtc->mode and not crtc->state->mode for the
457 * fastboot check to work correctly. crtc_state->mode has
458 * I915_MODE_FLAG_INHERITED, which we clear to force check
461 DRM_DEBUG_KMS("looking for current mode on connector %s\n",
463 modes[i] = &connector->state->crtc->mode;
467 DRM_DEBUG_KMS("connector %s on [CRTC:%d:%s]: %dx%d%s\n",
469 connector->state->crtc->base.id,
470 connector->state->crtc->name,
471 modes[i]->hdisplay, modes[i]->vdisplay,
472 modes[i]->flags & DRM_MODE_FLAG_INTERLACE ? "i" :"");
475 conn_configured |= BIT(i);
478 if ((conn_configured & mask) != mask && conn_configured != conn_seq)
482 * If the BIOS didn't enable everything it could, fall back to have the
483 * same user experiencing of lighting up as much as possible like the
484 * fbdev helper library.
486 if (num_connectors_enabled != num_connectors_detected &&
487 num_connectors_enabled < INTEL_INFO(dev_priv)->num_pipes) {
488 DRM_DEBUG_KMS("fallback: Not all outputs enabled\n");
489 DRM_DEBUG_KMS("Enabled: %i, detected: %i\n", num_connectors_enabled,
490 num_connectors_detected);
496 DRM_DEBUG_KMS("Not using firmware configuration\n");
497 memcpy(enabled, save_enabled, count);
501 drm_modeset_drop_locks(&ctx);
502 drm_modeset_acquire_fini(&ctx);
508 static const struct drm_fb_helper_funcs intel_fb_helper_funcs = {
509 .initial_config = intel_fb_initial_config,
510 .fb_probe = intelfb_create,
513 static void intel_fbdev_destroy(struct intel_fbdev *ifbdev)
515 /* We rely on the object-free to release the VMA pinning for
516 * the info->screen_base mmaping. Leaking the VMA is simpler than
517 * trying to rectify all the possible error paths leading here.
520 drm_fb_helper_fini(&ifbdev->helper);
523 mutex_lock(&ifbdev->helper.dev->struct_mutex);
524 intel_unpin_fb_vma(ifbdev->vma, ifbdev->vma_flags);
525 mutex_unlock(&ifbdev->helper.dev->struct_mutex);
529 drm_framebuffer_remove(&ifbdev->fb->base);
535 * Build an intel_fbdev struct using a BIOS allocated framebuffer, if possible.
536 * The core display code will have read out the current plane configuration,
537 * so we use that to figure out if there's an object for us to use as the
538 * fb, and if so, we re-use it for the fbdev configuration.
540 * Note we only support a single fb shared across pipes for boot (mostly for
541 * fbcon), so we just find the biggest and use that.
543 static bool intel_fbdev_init_bios(struct drm_device *dev,
544 struct intel_fbdev *ifbdev)
546 struct intel_framebuffer *fb = NULL;
547 struct drm_crtc *crtc;
548 struct intel_crtc *intel_crtc;
549 unsigned int max_size = 0;
551 /* Find the largest fb */
552 for_each_crtc(dev, crtc) {
553 struct drm_i915_gem_object *obj =
554 intel_fb_obj(crtc->primary->state->fb);
555 intel_crtc = to_intel_crtc(crtc);
557 if (!crtc->state->active || !obj) {
558 DRM_DEBUG_KMS("pipe %c not active or no fb, skipping\n",
559 pipe_name(intel_crtc->pipe));
563 if (obj->base.size > max_size) {
564 DRM_DEBUG_KMS("found possible fb from plane %c\n",
565 pipe_name(intel_crtc->pipe));
566 fb = to_intel_framebuffer(crtc->primary->state->fb);
567 max_size = obj->base.size;
572 DRM_DEBUG_KMS("no active fbs found, not using BIOS config\n");
576 /* Now make sure all the pipes will fit into it */
577 for_each_crtc(dev, crtc) {
578 unsigned int cur_size;
580 intel_crtc = to_intel_crtc(crtc);
582 if (!crtc->state->active) {
583 DRM_DEBUG_KMS("pipe %c not active, skipping\n",
584 pipe_name(intel_crtc->pipe));
588 DRM_DEBUG_KMS("checking plane %c for BIOS fb\n",
589 pipe_name(intel_crtc->pipe));
592 * See if the plane fb we found above will fit on this
593 * pipe. Note we need to use the selected fb's pitch and bpp
594 * rather than the current pipe's, since they differ.
596 cur_size = intel_crtc->config->base.adjusted_mode.crtc_hdisplay;
597 cur_size = cur_size * fb->base.format->cpp[0];
598 if (fb->base.pitches[0] < cur_size) {
599 DRM_DEBUG_KMS("fb not wide enough for plane %c (%d vs %d)\n",
600 pipe_name(intel_crtc->pipe),
601 cur_size, fb->base.pitches[0]);
606 cur_size = intel_crtc->config->base.adjusted_mode.crtc_vdisplay;
607 cur_size = intel_fb_align_height(&fb->base, 0, cur_size);
608 cur_size *= fb->base.pitches[0];
609 DRM_DEBUG_KMS("pipe %c area: %dx%d, bpp: %d, size: %d\n",
610 pipe_name(intel_crtc->pipe),
611 intel_crtc->config->base.adjusted_mode.crtc_hdisplay,
612 intel_crtc->config->base.adjusted_mode.crtc_vdisplay,
613 fb->base.format->cpp[0] * 8,
616 if (cur_size > max_size) {
617 DRM_DEBUG_KMS("fb not big enough for plane %c (%d vs %d)\n",
618 pipe_name(intel_crtc->pipe),
624 DRM_DEBUG_KMS("fb big enough for plane %c (%d >= %d)\n",
625 pipe_name(intel_crtc->pipe),
630 DRM_DEBUG_KMS("BIOS fb not suitable for all pipes, not using\n");
634 ifbdev->preferred_bpp = fb->base.format->cpp[0] * 8;
637 drm_framebuffer_get(&ifbdev->fb->base);
639 /* Final pass to check if any active pipes don't have fbs */
640 for_each_crtc(dev, crtc) {
641 intel_crtc = to_intel_crtc(crtc);
643 if (!crtc->state->active)
646 WARN(!crtc->primary->state->fb,
647 "re-used BIOS config but lost an fb on crtc %d\n",
652 DRM_DEBUG_KMS("using BIOS fb for initial console\n");
660 static void intel_fbdev_suspend_worker(struct work_struct *work)
662 intel_fbdev_set_suspend(&container_of(work,
663 struct drm_i915_private,
664 fbdev_suspend_work)->drm,
665 FBINFO_STATE_RUNNING,
669 int intel_fbdev_init(struct drm_device *dev)
671 struct drm_i915_private *dev_priv = to_i915(dev);
672 struct intel_fbdev *ifbdev;
675 if (WARN_ON(INTEL_INFO(dev_priv)->num_pipes == 0))
678 ifbdev = kzalloc(sizeof(struct intel_fbdev), GFP_KERNEL);
682 drm_fb_helper_prepare(dev, &ifbdev->helper, &intel_fb_helper_funcs);
684 if (!intel_fbdev_init_bios(dev, ifbdev))
685 ifbdev->preferred_bpp = 32;
687 ret = drm_fb_helper_init(dev, &ifbdev->helper, 4);
693 dev_priv->fbdev = ifbdev;
694 INIT_WORK(&dev_priv->fbdev_suspend_work, intel_fbdev_suspend_worker);
696 drm_fb_helper_single_add_all_connectors(&ifbdev->helper);
701 static void intel_fbdev_initial_config(void *data, async_cookie_t cookie)
703 struct intel_fbdev *ifbdev = data;
705 /* Due to peculiar init order wrt to hpd handling this is separate. */
706 if (drm_fb_helper_initial_config(&ifbdev->helper,
707 ifbdev->preferred_bpp))
708 intel_fbdev_unregister(to_i915(ifbdev->helper.dev));
711 void intel_fbdev_initial_config_async(struct drm_device *dev)
713 struct intel_fbdev *ifbdev = to_i915(dev)->fbdev;
718 ifbdev->cookie = async_schedule(intel_fbdev_initial_config, ifbdev);
721 static void intel_fbdev_sync(struct intel_fbdev *ifbdev)
726 /* Only serialises with all preceding async calls, hence +1 */
727 async_synchronize_cookie(ifbdev->cookie + 1);
731 void intel_fbdev_unregister(struct drm_i915_private *dev_priv)
733 struct intel_fbdev *ifbdev = dev_priv->fbdev;
738 cancel_work_sync(&dev_priv->fbdev_suspend_work);
739 if (!current_is_async())
740 intel_fbdev_sync(ifbdev);
742 drm_fb_helper_unregister_fbi(&ifbdev->helper);
745 void intel_fbdev_fini(struct drm_i915_private *dev_priv)
747 struct intel_fbdev *ifbdev = fetch_and_zero(&dev_priv->fbdev);
752 intel_fbdev_destroy(ifbdev);
755 void intel_fbdev_set_suspend(struct drm_device *dev, int state, bool synchronous)
757 struct drm_i915_private *dev_priv = to_i915(dev);
758 struct intel_fbdev *ifbdev = dev_priv->fbdev;
759 struct fb_info *info;
761 if (!ifbdev || !ifbdev->vma)
764 info = ifbdev->helper.fbdev;
767 /* Flush any pending work to turn the console on, and then
768 * wait to turn it off. It must be synchronous as we are
769 * about to suspend or unload the driver.
771 * Note that from within the work-handler, we cannot flush
772 * ourselves, so only flush outstanding work upon suspend!
774 if (state != FBINFO_STATE_RUNNING)
775 flush_work(&dev_priv->fbdev_suspend_work);
779 * The console lock can be pretty contented on resume due
780 * to all the printk activity. Try to keep it out of the hot
781 * path of resume if possible.
783 WARN_ON(state != FBINFO_STATE_RUNNING);
784 if (!console_trylock()) {
785 /* Don't block our own workqueue as this can
786 * be run in parallel with other i915.ko tasks.
788 schedule_work(&dev_priv->fbdev_suspend_work);
793 /* On resume from hibernation: If the object is shmemfs backed, it has
794 * been restored from swap. If the object is stolen however, it will be
795 * full of whatever garbage was left in there.
797 if (state == FBINFO_STATE_RUNNING &&
798 intel_fb_obj(&ifbdev->fb->base)->stolen)
799 memset_io(info->screen_base, 0, info->screen_size);
801 drm_fb_helper_set_suspend(&ifbdev->helper, state);
805 void intel_fbdev_output_poll_changed(struct drm_device *dev)
807 struct intel_fbdev *ifbdev = to_i915(dev)->fbdev;
812 intel_fbdev_sync(ifbdev);
813 if (ifbdev->vma || ifbdev->helper.deferred_setup)
814 drm_fb_helper_hotplug_event(&ifbdev->helper);
817 void intel_fbdev_restore_mode(struct drm_device *dev)
819 struct intel_fbdev *ifbdev = to_i915(dev)->fbdev;
824 intel_fbdev_sync(ifbdev);
828 if (drm_fb_helper_restore_fbdev_mode_unlocked(&ifbdev->helper) == 0)
829 intel_fbdev_invalidate(ifbdev);