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>
40 #include <drm/drm_crtc.h>
41 #include <drm/drm_fb_helper.h>
42 #include <drm/drm_fourcc.h>
44 #include "intel_drv.h"
45 #include "intel_frontbuffer.h"
46 #include <drm/i915_drm.h>
49 static void intel_fbdev_invalidate(struct intel_fbdev *ifbdev)
51 struct drm_i915_gem_object *obj = intel_fb_obj(&ifbdev->fb->base);
53 ifbdev->vma_flags & PLANE_HAS_FENCE ? ORIGIN_GTT : ORIGIN_CPU;
55 intel_fb_obj_invalidate(obj, origin);
58 static int intel_fbdev_set_par(struct fb_info *info)
60 struct drm_fb_helper *fb_helper = info->par;
61 struct intel_fbdev *ifbdev =
62 container_of(fb_helper, struct intel_fbdev, helper);
65 ret = drm_fb_helper_set_par(info);
67 intel_fbdev_invalidate(ifbdev);
72 static int intel_fbdev_blank(int blank, struct fb_info *info)
74 struct drm_fb_helper *fb_helper = info->par;
75 struct intel_fbdev *ifbdev =
76 container_of(fb_helper, struct intel_fbdev, helper);
79 ret = drm_fb_helper_blank(blank, info);
81 intel_fbdev_invalidate(ifbdev);
86 static int intel_fbdev_pan_display(struct fb_var_screeninfo *var,
89 struct drm_fb_helper *fb_helper = info->par;
90 struct intel_fbdev *ifbdev =
91 container_of(fb_helper, struct intel_fbdev, helper);
94 ret = drm_fb_helper_pan_display(var, info);
96 intel_fbdev_invalidate(ifbdev);
101 static struct fb_ops intelfb_ops = {
102 .owner = THIS_MODULE,
103 DRM_FB_HELPER_DEFAULT_OPS,
104 .fb_set_par = intel_fbdev_set_par,
105 .fb_fillrect = drm_fb_helper_cfb_fillrect,
106 .fb_copyarea = drm_fb_helper_cfb_copyarea,
107 .fb_imageblit = drm_fb_helper_cfb_imageblit,
108 .fb_pan_display = intel_fbdev_pan_display,
109 .fb_blank = intel_fbdev_blank,
112 static int intelfb_alloc(struct drm_fb_helper *helper,
113 struct drm_fb_helper_surface_size *sizes)
115 struct intel_fbdev *ifbdev =
116 container_of(helper, struct intel_fbdev, helper);
117 struct drm_framebuffer *fb;
118 struct drm_device *dev = helper->dev;
119 struct drm_i915_private *dev_priv = to_i915(dev);
120 struct drm_mode_fb_cmd2 mode_cmd = {};
121 struct drm_i915_gem_object *obj;
124 /* we don't do packed 24bpp */
125 if (sizes->surface_bpp == 24)
126 sizes->surface_bpp = 32;
128 mode_cmd.width = sizes->surface_width;
129 mode_cmd.height = sizes->surface_height;
131 mode_cmd.pitches[0] = ALIGN(mode_cmd.width *
132 DIV_ROUND_UP(sizes->surface_bpp, 8), 64);
133 mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp,
134 sizes->surface_depth);
136 size = mode_cmd.pitches[0] * mode_cmd.height;
137 size = PAGE_ALIGN(size);
139 /* If the FB is too big, just don't use it since fbdev is not very
140 * important and we should probably use that space with FBC or other
143 if (size * 2 < dev_priv->stolen_usable_size)
144 obj = i915_gem_object_create_stolen(dev_priv, size);
146 obj = i915_gem_object_create(dev_priv, size);
148 DRM_ERROR("failed to allocate framebuffer\n");
153 fb = intel_framebuffer_create(obj, &mode_cmd);
159 ifbdev->fb = to_intel_framebuffer(fb);
164 i915_gem_object_put(obj);
169 static int intelfb_create(struct drm_fb_helper *helper,
170 struct drm_fb_helper_surface_size *sizes)
172 struct intel_fbdev *ifbdev =
173 container_of(helper, struct intel_fbdev, helper);
174 struct intel_framebuffer *intel_fb = ifbdev->fb;
175 struct drm_device *dev = helper->dev;
176 struct drm_i915_private *dev_priv = to_i915(dev);
177 struct pci_dev *pdev = dev_priv->drm.pdev;
178 struct i915_ggtt *ggtt = &dev_priv->ggtt;
179 const struct i915_ggtt_view view = {
180 .type = I915_GGTT_VIEW_NORMAL,
182 struct drm_framebuffer *fb;
183 intel_wakeref_t wakeref;
184 struct fb_info *info;
185 struct i915_vma *vma;
186 unsigned long flags = 0;
187 bool prealloc = false;
192 (sizes->fb_width > intel_fb->base.width ||
193 sizes->fb_height > intel_fb->base.height)) {
194 DRM_DEBUG_KMS("BIOS fb too small (%dx%d), we require (%dx%d),"
196 intel_fb->base.width, intel_fb->base.height,
197 sizes->fb_width, sizes->fb_height);
198 drm_framebuffer_put(&intel_fb->base);
199 intel_fb = ifbdev->fb = NULL;
201 if (!intel_fb || WARN_ON(!intel_fb_obj(&intel_fb->base))) {
202 DRM_DEBUG_KMS("no BIOS fb, allocating a new one\n");
203 ret = intelfb_alloc(helper, sizes);
206 intel_fb = ifbdev->fb;
208 DRM_DEBUG_KMS("re-using BIOS fb\n");
210 sizes->fb_width = intel_fb->base.width;
211 sizes->fb_height = intel_fb->base.height;
214 mutex_lock(&dev->struct_mutex);
215 wakeref = intel_runtime_pm_get(dev_priv);
217 /* Pin the GGTT vma for our access via info->screen_base.
218 * This also validates that any existing fb inherited from the
219 * BIOS is suitable for own access.
221 vma = intel_pin_and_fence_fb_obj(&ifbdev->fb->base,
222 &view, false, &flags);
228 fb = &ifbdev->fb->base;
229 intel_fb_obj_flush(intel_fb_obj(fb), ORIGIN_DIRTYFB);
231 info = drm_fb_helper_alloc_fbi(helper);
233 DRM_ERROR("Failed to allocate fb_info\n");
240 ifbdev->helper.fb = fb;
242 strcpy(info->fix.id, "inteldrmfb");
244 info->fbops = &intelfb_ops;
246 /* setup aperture base/size for vesafb takeover */
247 info->apertures->ranges[0].base = dev->mode_config.fb_base;
248 info->apertures->ranges[0].size = ggtt->mappable_end;
250 info->fix.smem_start = dev->mode_config.fb_base + i915_ggtt_offset(vma);
251 info->fix.smem_len = vma->node.size;
253 vaddr = i915_vma_pin_iomap(vma);
255 DRM_ERROR("Failed to remap framebuffer into virtual memory\n");
256 ret = PTR_ERR(vaddr);
259 info->screen_base = vaddr;
260 info->screen_size = vma->node.size;
262 /* This driver doesn't need a VT switch to restore the mode on resume */
263 info->skip_vt_switch = true;
265 drm_fb_helper_fill_fix(info, fb->pitches[0], fb->format->depth);
266 drm_fb_helper_fill_var(info, &ifbdev->helper, sizes->fb_width, sizes->fb_height);
268 /* If the object is shmemfs backed, it will have given us zeroed pages.
269 * If the object is stolen however, it will be full of whatever
270 * garbage was left in there.
272 if (intel_fb_obj(fb)->stolen && !prealloc)
273 memset_io(info->screen_base, 0, info->screen_size);
275 /* Use default scratch pixmap (info->pixmap.flags = FB_PIXMAP_SYSTEM) */
277 DRM_DEBUG_KMS("allocated %dx%d fb: 0x%08x\n",
278 fb->width, fb->height, i915_ggtt_offset(vma));
280 ifbdev->vma_flags = flags;
282 intel_runtime_pm_put(dev_priv, wakeref);
283 mutex_unlock(&dev->struct_mutex);
284 vga_switcheroo_client_fb_set(pdev, info);
288 intel_unpin_fb_vma(vma, flags);
290 intel_runtime_pm_put(dev_priv, wakeref);
291 mutex_unlock(&dev->struct_mutex);
295 static struct drm_fb_helper_crtc *
296 intel_fb_helper_crtc(struct drm_fb_helper *fb_helper, struct drm_crtc *crtc)
300 for (i = 0; i < fb_helper->crtc_count; i++)
301 if (fb_helper->crtc_info[i].mode_set.crtc == crtc)
302 return &fb_helper->crtc_info[i];
308 * Try to read the BIOS display configuration and use it for the initial
311 * The BIOS or boot loader will generally create an initial display
312 * configuration for us that includes some set of active pipes and displays.
313 * This routine tries to figure out which pipes and connectors are active
314 * and stuffs them into the crtcs and modes array given to us by the
315 * drm_fb_helper code.
317 * The overall sequence is:
318 * intel_fbdev_init - from driver load
319 * intel_fbdev_init_bios - initialize the intel_fbdev using BIOS data
320 * drm_fb_helper_init - build fb helper structs
321 * drm_fb_helper_single_add_all_connectors - more fb helper structs
322 * intel_fbdev_initial_config - apply the config
323 * drm_fb_helper_initial_config - call ->probe then register_framebuffer()
324 * drm_setup_crtcs - build crtc config for fbdev
325 * intel_fb_initial_config - find active connectors etc
326 * drm_fb_helper_single_fb_probe - set up fbdev
327 * intelfb_create - re-use or alloc fb, build out fbdev structs
329 * Note that we don't make special consideration whether we could actually
330 * switch to the selected modes without a full modeset. E.g. when the display
331 * is in VGA mode we need to recalculate watermarks and set a new high-res
332 * framebuffer anyway.
334 static bool intel_fb_initial_config(struct drm_fb_helper *fb_helper,
335 struct drm_fb_helper_crtc **crtcs,
336 struct drm_display_mode **modes,
337 struct drm_fb_offset *offsets,
338 bool *enabled, int width, int height)
340 struct drm_i915_private *dev_priv = to_i915(fb_helper->dev);
341 unsigned int count = min(fb_helper->connector_count, BITS_PER_LONG);
342 unsigned long conn_configured, conn_seq;
345 bool fallback = true, ret = true;
346 int num_connectors_enabled = 0;
347 int num_connectors_detected = 0;
348 struct drm_modeset_acquire_ctx ctx;
350 save_enabled = kcalloc(count, sizeof(bool), GFP_KERNEL);
354 drm_modeset_acquire_init(&ctx, 0);
356 while (drm_modeset_lock_all_ctx(fb_helper->dev, &ctx) != 0)
357 drm_modeset_backoff(&ctx);
359 memcpy(save_enabled, enabled, count);
360 conn_seq = GENMASK(count - 1, 0);
363 for (i = 0; i < count; i++) {
364 struct drm_fb_helper_connector *fb_conn;
365 struct drm_connector *connector;
366 struct drm_encoder *encoder;
367 struct drm_fb_helper_crtc *new_crtc;
369 fb_conn = fb_helper->connector_info[i];
370 connector = fb_conn->connector;
372 if (conn_configured & BIT(i))
375 /* First pass, only consider tiled connectors */
376 if (conn_seq == GENMASK(count - 1, 0) && !connector->has_tile)
379 if (connector->status == connector_status_connected)
380 num_connectors_detected++;
383 DRM_DEBUG_KMS("connector %s not enabled, skipping\n",
385 conn_configured |= BIT(i);
389 if (connector->force == DRM_FORCE_OFF) {
390 DRM_DEBUG_KMS("connector %s is disabled by user, skipping\n",
396 encoder = connector->state->best_encoder;
397 if (!encoder || WARN_ON(!connector->state->crtc)) {
398 if (connector->force > DRM_FORCE_OFF)
401 DRM_DEBUG_KMS("connector %s has no encoder or crtc, skipping\n",
404 conn_configured |= BIT(i);
408 num_connectors_enabled++;
410 new_crtc = intel_fb_helper_crtc(fb_helper,
411 connector->state->crtc);
414 * Make sure we're not trying to drive multiple connectors
415 * with a single CRTC, since our cloning support may not
418 for (j = 0; j < count; j++) {
419 if (crtcs[j] == new_crtc) {
420 DRM_DEBUG_KMS("fallback: cloned configuration\n");
425 DRM_DEBUG_KMS("looking for cmdline mode on connector %s\n",
428 /* go for command line mode first */
429 modes[i] = drm_pick_cmdline_mode(fb_conn);
431 /* try for preferred next */
433 DRM_DEBUG_KMS("looking for preferred mode on connector %s %d\n",
434 connector->name, connector->has_tile);
435 modes[i] = drm_has_preferred_mode(fb_conn, width,
439 /* No preferred mode marked by the EDID? Are there any modes? */
440 if (!modes[i] && !list_empty(&connector->modes)) {
441 DRM_DEBUG_KMS("using first mode listed on connector %s\n",
443 modes[i] = list_first_entry(&connector->modes,
444 struct drm_display_mode,
448 /* last resort: use current mode */
451 * IMPORTANT: We want to use the adjusted mode (i.e.
452 * after the panel fitter upscaling) as the initial
453 * config, not the input mode, which is what crtc->mode
454 * usually contains. But since our current
455 * code puts a mode derived from the post-pfit timings
456 * into crtc->mode this works out correctly.
458 * This is crtc->mode and not crtc->state->mode for the
459 * fastboot check to work correctly. crtc_state->mode has
460 * I915_MODE_FLAG_INHERITED, which we clear to force check
463 DRM_DEBUG_KMS("looking for current mode on connector %s\n",
465 modes[i] = &connector->state->crtc->mode;
469 DRM_DEBUG_KMS("connector %s on [CRTC:%d:%s]: %dx%d%s\n",
471 connector->state->crtc->base.id,
472 connector->state->crtc->name,
473 modes[i]->hdisplay, modes[i]->vdisplay,
474 modes[i]->flags & DRM_MODE_FLAG_INTERLACE ? "i" :"");
477 conn_configured |= BIT(i);
480 if (conn_configured != conn_seq) { /* repeat until no more are found */
481 conn_seq = conn_configured;
486 * If the BIOS didn't enable everything it could, fall back to have the
487 * same user experiencing of lighting up as much as possible like the
488 * fbdev helper library.
490 if (num_connectors_enabled != num_connectors_detected &&
491 num_connectors_enabled < INTEL_INFO(dev_priv)->num_pipes) {
492 DRM_DEBUG_KMS("fallback: Not all outputs enabled\n");
493 DRM_DEBUG_KMS("Enabled: %i, detected: %i\n", num_connectors_enabled,
494 num_connectors_detected);
500 DRM_DEBUG_KMS("Not using firmware configuration\n");
501 memcpy(enabled, save_enabled, count);
505 drm_modeset_drop_locks(&ctx);
506 drm_modeset_acquire_fini(&ctx);
512 static const struct drm_fb_helper_funcs intel_fb_helper_funcs = {
513 .initial_config = intel_fb_initial_config,
514 .fb_probe = intelfb_create,
517 static void intel_fbdev_destroy(struct intel_fbdev *ifbdev)
519 /* We rely on the object-free to release the VMA pinning for
520 * the info->screen_base mmaping. Leaking the VMA is simpler than
521 * trying to rectify all the possible error paths leading here.
524 drm_fb_helper_fini(&ifbdev->helper);
527 mutex_lock(&ifbdev->helper.dev->struct_mutex);
528 intel_unpin_fb_vma(ifbdev->vma, ifbdev->vma_flags);
529 mutex_unlock(&ifbdev->helper.dev->struct_mutex);
533 drm_framebuffer_remove(&ifbdev->fb->base);
539 * Build an intel_fbdev struct using a BIOS allocated framebuffer, if possible.
540 * The core display code will have read out the current plane configuration,
541 * so we use that to figure out if there's an object for us to use as the
542 * fb, and if so, we re-use it for the fbdev configuration.
544 * Note we only support a single fb shared across pipes for boot (mostly for
545 * fbcon), so we just find the biggest and use that.
547 static bool intel_fbdev_init_bios(struct drm_device *dev,
548 struct intel_fbdev *ifbdev)
550 struct intel_framebuffer *fb = NULL;
551 struct drm_crtc *crtc;
552 struct intel_crtc *intel_crtc;
553 unsigned int max_size = 0;
555 /* Find the largest fb */
556 for_each_crtc(dev, crtc) {
557 struct drm_i915_gem_object *obj =
558 intel_fb_obj(crtc->primary->state->fb);
559 intel_crtc = to_intel_crtc(crtc);
561 if (!crtc->state->active || !obj) {
562 DRM_DEBUG_KMS("pipe %c not active or no fb, skipping\n",
563 pipe_name(intel_crtc->pipe));
567 if (obj->base.size > max_size) {
568 DRM_DEBUG_KMS("found possible fb from plane %c\n",
569 pipe_name(intel_crtc->pipe));
570 fb = to_intel_framebuffer(crtc->primary->state->fb);
571 max_size = obj->base.size;
576 DRM_DEBUG_KMS("no active fbs found, not using BIOS config\n");
580 /* Now make sure all the pipes will fit into it */
581 for_each_crtc(dev, crtc) {
582 unsigned int cur_size;
584 intel_crtc = to_intel_crtc(crtc);
586 if (!crtc->state->active) {
587 DRM_DEBUG_KMS("pipe %c not active, skipping\n",
588 pipe_name(intel_crtc->pipe));
592 DRM_DEBUG_KMS("checking plane %c for BIOS fb\n",
593 pipe_name(intel_crtc->pipe));
596 * See if the plane fb we found above will fit on this
597 * pipe. Note we need to use the selected fb's pitch and bpp
598 * rather than the current pipe's, since they differ.
600 cur_size = crtc->state->adjusted_mode.crtc_hdisplay;
601 cur_size = cur_size * fb->base.format->cpp[0];
602 if (fb->base.pitches[0] < cur_size) {
603 DRM_DEBUG_KMS("fb not wide enough for plane %c (%d vs %d)\n",
604 pipe_name(intel_crtc->pipe),
605 cur_size, fb->base.pitches[0]);
610 cur_size = crtc->state->adjusted_mode.crtc_vdisplay;
611 cur_size = intel_fb_align_height(&fb->base, 0, cur_size);
612 cur_size *= fb->base.pitches[0];
613 DRM_DEBUG_KMS("pipe %c area: %dx%d, bpp: %d, size: %d\n",
614 pipe_name(intel_crtc->pipe),
615 crtc->state->adjusted_mode.crtc_hdisplay,
616 crtc->state->adjusted_mode.crtc_vdisplay,
617 fb->base.format->cpp[0] * 8,
620 if (cur_size > max_size) {
621 DRM_DEBUG_KMS("fb not big enough for plane %c (%d vs %d)\n",
622 pipe_name(intel_crtc->pipe),
628 DRM_DEBUG_KMS("fb big enough for plane %c (%d >= %d)\n",
629 pipe_name(intel_crtc->pipe),
634 DRM_DEBUG_KMS("BIOS fb not suitable for all pipes, not using\n");
638 ifbdev->preferred_bpp = fb->base.format->cpp[0] * 8;
641 drm_framebuffer_get(&ifbdev->fb->base);
643 /* Final pass to check if any active pipes don't have fbs */
644 for_each_crtc(dev, crtc) {
645 intel_crtc = to_intel_crtc(crtc);
647 if (!crtc->state->active)
650 WARN(!crtc->primary->state->fb,
651 "re-used BIOS config but lost an fb on crtc %d\n",
656 DRM_DEBUG_KMS("using BIOS fb for initial console\n");
664 static void intel_fbdev_suspend_worker(struct work_struct *work)
666 intel_fbdev_set_suspend(&container_of(work,
667 struct drm_i915_private,
668 fbdev_suspend_work)->drm,
669 FBINFO_STATE_RUNNING,
673 int intel_fbdev_init(struct drm_device *dev)
675 struct drm_i915_private *dev_priv = to_i915(dev);
676 struct intel_fbdev *ifbdev;
679 if (WARN_ON(!HAS_DISPLAY(dev_priv)))
682 ifbdev = kzalloc(sizeof(struct intel_fbdev), GFP_KERNEL);
686 mutex_init(&ifbdev->hpd_lock);
687 drm_fb_helper_prepare(dev, &ifbdev->helper, &intel_fb_helper_funcs);
689 if (!intel_fbdev_init_bios(dev, ifbdev))
690 ifbdev->preferred_bpp = 32;
692 ret = drm_fb_helper_init(dev, &ifbdev->helper, 4);
698 dev_priv->fbdev = ifbdev;
699 INIT_WORK(&dev_priv->fbdev_suspend_work, intel_fbdev_suspend_worker);
701 drm_fb_helper_single_add_all_connectors(&ifbdev->helper);
706 static void intel_fbdev_initial_config(void *data, async_cookie_t cookie)
708 struct intel_fbdev *ifbdev = data;
710 /* Due to peculiar init order wrt to hpd handling this is separate. */
711 if (drm_fb_helper_initial_config(&ifbdev->helper,
712 ifbdev->preferred_bpp))
713 intel_fbdev_unregister(to_i915(ifbdev->helper.dev));
716 void intel_fbdev_initial_config_async(struct drm_device *dev)
718 struct intel_fbdev *ifbdev = to_i915(dev)->fbdev;
723 ifbdev->cookie = async_schedule(intel_fbdev_initial_config, ifbdev);
726 static void intel_fbdev_sync(struct intel_fbdev *ifbdev)
731 /* Only serialises with all preceding async calls, hence +1 */
732 async_synchronize_cookie(ifbdev->cookie + 1);
736 void intel_fbdev_unregister(struct drm_i915_private *dev_priv)
738 struct intel_fbdev *ifbdev = dev_priv->fbdev;
743 cancel_work_sync(&dev_priv->fbdev_suspend_work);
744 if (!current_is_async())
745 intel_fbdev_sync(ifbdev);
747 drm_fb_helper_unregister_fbi(&ifbdev->helper);
750 void intel_fbdev_fini(struct drm_i915_private *dev_priv)
752 struct intel_fbdev *ifbdev = fetch_and_zero(&dev_priv->fbdev);
757 intel_fbdev_destroy(ifbdev);
760 /* Suspends/resumes fbdev processing of incoming HPD events. When resuming HPD
761 * processing, fbdev will perform a full connector reprobe if a hotplug event
762 * was received while HPD was suspended.
764 static void intel_fbdev_hpd_set_suspend(struct intel_fbdev *ifbdev, int state)
766 bool send_hpd = false;
768 mutex_lock(&ifbdev->hpd_lock);
769 ifbdev->hpd_suspended = state == FBINFO_STATE_SUSPENDED;
770 send_hpd = !ifbdev->hpd_suspended && ifbdev->hpd_waiting;
771 ifbdev->hpd_waiting = false;
772 mutex_unlock(&ifbdev->hpd_lock);
775 DRM_DEBUG_KMS("Handling delayed fbcon HPD event\n");
776 drm_fb_helper_hotplug_event(&ifbdev->helper);
780 void intel_fbdev_set_suspend(struct drm_device *dev, int state, bool synchronous)
782 struct drm_i915_private *dev_priv = to_i915(dev);
783 struct intel_fbdev *ifbdev = dev_priv->fbdev;
784 struct fb_info *info;
786 if (!ifbdev || !ifbdev->vma)
789 info = ifbdev->helper.fbdev;
792 /* Flush any pending work to turn the console on, and then
793 * wait to turn it off. It must be synchronous as we are
794 * about to suspend or unload the driver.
796 * Note that from within the work-handler, we cannot flush
797 * ourselves, so only flush outstanding work upon suspend!
799 if (state != FBINFO_STATE_RUNNING)
800 flush_work(&dev_priv->fbdev_suspend_work);
805 * The console lock can be pretty contented on resume due
806 * to all the printk activity. Try to keep it out of the hot
807 * path of resume if possible.
809 WARN_ON(state != FBINFO_STATE_RUNNING);
810 if (!console_trylock()) {
811 /* Don't block our own workqueue as this can
812 * be run in parallel with other i915.ko tasks.
814 schedule_work(&dev_priv->fbdev_suspend_work);
819 /* On resume from hibernation: If the object is shmemfs backed, it has
820 * been restored from swap. If the object is stolen however, it will be
821 * full of whatever garbage was left in there.
823 if (state == FBINFO_STATE_RUNNING &&
824 intel_fb_obj(&ifbdev->fb->base)->stolen)
825 memset_io(info->screen_base, 0, info->screen_size);
827 drm_fb_helper_set_suspend(&ifbdev->helper, state);
830 intel_fbdev_hpd_set_suspend(ifbdev, state);
833 void intel_fbdev_output_poll_changed(struct drm_device *dev)
835 struct intel_fbdev *ifbdev = to_i915(dev)->fbdev;
841 intel_fbdev_sync(ifbdev);
843 mutex_lock(&ifbdev->hpd_lock);
844 send_hpd = !ifbdev->hpd_suspended;
845 ifbdev->hpd_waiting = true;
846 mutex_unlock(&ifbdev->hpd_lock);
848 if (send_hpd && (ifbdev->vma || ifbdev->helper.deferred_setup))
849 drm_fb_helper_hotplug_event(&ifbdev->helper);
852 void intel_fbdev_restore_mode(struct drm_device *dev)
854 struct intel_fbdev *ifbdev = to_i915(dev)->fbdev;
859 intel_fbdev_sync(ifbdev);
863 if (drm_fb_helper_restore_fbdev_mode_unlocked(&ifbdev->helper) == 0)
864 intel_fbdev_invalidate(ifbdev);