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);
58 mutex_lock(&fb_helper->dev->struct_mutex);
59 intel_fb_obj_invalidate(ifbdev->fb->obj, ORIGIN_GTT);
60 mutex_unlock(&fb_helper->dev->struct_mutex);
66 static int intel_fbdev_blank(int blank, struct fb_info *info)
68 struct drm_fb_helper *fb_helper = info->par;
69 struct intel_fbdev *ifbdev =
70 container_of(fb_helper, struct intel_fbdev, helper);
73 ret = drm_fb_helper_blank(blank, info);
76 mutex_lock(&fb_helper->dev->struct_mutex);
77 intel_fb_obj_invalidate(ifbdev->fb->obj, ORIGIN_GTT);
78 mutex_unlock(&fb_helper->dev->struct_mutex);
84 static int intel_fbdev_pan_display(struct fb_var_screeninfo *var,
87 struct drm_fb_helper *fb_helper = info->par;
88 struct intel_fbdev *ifbdev =
89 container_of(fb_helper, struct intel_fbdev, helper);
92 ret = drm_fb_helper_pan_display(var, info);
95 mutex_lock(&fb_helper->dev->struct_mutex);
96 intel_fb_obj_invalidate(ifbdev->fb->obj, ORIGIN_GTT);
97 mutex_unlock(&fb_helper->dev->struct_mutex);
103 static struct fb_ops intelfb_ops = {
104 .owner = THIS_MODULE,
105 .fb_check_var = drm_fb_helper_check_var,
106 .fb_set_par = intel_fbdev_set_par,
107 .fb_fillrect = drm_fb_helper_cfb_fillrect,
108 .fb_copyarea = drm_fb_helper_cfb_copyarea,
109 .fb_imageblit = drm_fb_helper_cfb_imageblit,
110 .fb_pan_display = intel_fbdev_pan_display,
111 .fb_blank = intel_fbdev_blank,
112 .fb_setcmap = drm_fb_helper_setcmap,
113 .fb_debug_enter = drm_fb_helper_debug_enter,
114 .fb_debug_leave = drm_fb_helper_debug_leave,
117 static int intelfb_alloc(struct drm_fb_helper *helper,
118 struct drm_fb_helper_surface_size *sizes)
120 struct intel_fbdev *ifbdev =
121 container_of(helper, struct intel_fbdev, helper);
122 struct drm_framebuffer *fb;
123 struct drm_device *dev = helper->dev;
124 struct drm_i915_private *dev_priv = to_i915(dev);
125 struct i915_ggtt *ggtt = &dev_priv->ggtt;
126 struct drm_mode_fb_cmd2 mode_cmd = {};
127 struct drm_i915_gem_object *obj = NULL;
130 /* we don't do packed 24bpp */
131 if (sizes->surface_bpp == 24)
132 sizes->surface_bpp = 32;
134 mode_cmd.width = sizes->surface_width;
135 mode_cmd.height = sizes->surface_height;
137 mode_cmd.pitches[0] = ALIGN(mode_cmd.width *
138 DIV_ROUND_UP(sizes->surface_bpp, 8), 64);
139 mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp,
140 sizes->surface_depth);
142 mutex_lock(&dev->struct_mutex);
144 size = mode_cmd.pitches[0] * mode_cmd.height;
145 size = PAGE_ALIGN(size);
147 /* If the FB is too big, just don't use it since fbdev is not very
148 * important and we should probably use that space with FBC or other
150 if (size * 2 < ggtt->stolen_usable_size)
151 obj = i915_gem_object_create_stolen(dev, size);
153 obj = i915_gem_alloc_object(dev, size);
155 DRM_ERROR("failed to allocate framebuffer\n");
160 fb = __intel_framebuffer_create(dev, &mode_cmd, obj);
162 drm_gem_object_unreference(&obj->base);
167 mutex_unlock(&dev->struct_mutex);
169 ifbdev->fb = to_intel_framebuffer(fb);
174 mutex_unlock(&dev->struct_mutex);
178 static int intelfb_create(struct drm_fb_helper *helper,
179 struct drm_fb_helper_surface_size *sizes)
181 struct intel_fbdev *ifbdev =
182 container_of(helper, struct intel_fbdev, helper);
183 struct intel_framebuffer *intel_fb = ifbdev->fb;
184 struct drm_device *dev = helper->dev;
185 struct drm_i915_private *dev_priv = to_i915(dev);
186 struct i915_ggtt *ggtt = &dev_priv->ggtt;
187 struct fb_info *info;
188 struct drm_framebuffer *fb;
189 struct drm_i915_gem_object *obj;
191 bool prealloc = false;
194 (sizes->fb_width > intel_fb->base.width ||
195 sizes->fb_height > intel_fb->base.height)) {
196 DRM_DEBUG_KMS("BIOS fb too small (%dx%d), we require (%dx%d),"
198 intel_fb->base.width, intel_fb->base.height,
199 sizes->fb_width, sizes->fb_height);
200 drm_framebuffer_unreference(&intel_fb->base);
201 intel_fb = ifbdev->fb = NULL;
203 if (!intel_fb || WARN_ON(!intel_fb->obj)) {
204 DRM_DEBUG_KMS("no BIOS fb, allocating a new one\n");
205 ret = intelfb_alloc(helper, sizes);
208 intel_fb = ifbdev->fb;
210 DRM_DEBUG_KMS("re-using BIOS fb\n");
212 sizes->fb_width = intel_fb->base.width;
213 sizes->fb_height = intel_fb->base.height;
217 size = obj->base.size;
219 mutex_lock(&dev->struct_mutex);
221 /* Pin the GGTT vma for our access via info->screen_base.
222 * This also validates that any existing fb inherited from the
223 * BIOS is suitable for own access.
225 ret = intel_pin_and_fence_fb_obj(&ifbdev->fb->base, BIT(DRM_ROTATE_0));
229 info = drm_fb_helper_alloc_fbi(helper);
231 DRM_ERROR("Failed to allocate fb_info\n");
238 fb = &ifbdev->fb->base;
240 ifbdev->helper.fb = fb;
242 strcpy(info->fix.id, "inteldrmfb");
244 info->flags = FBINFO_DEFAULT | FBINFO_CAN_FORCE_OUTPUT;
245 info->fbops = &intelfb_ops;
247 /* setup aperture base/size for vesafb takeover */
248 info->apertures->ranges[0].base = dev->mode_config.fb_base;
249 info->apertures->ranges[0].size = ggtt->mappable_end;
251 info->fix.smem_start = dev->mode_config.fb_base + i915_gem_obj_ggtt_offset(obj);
252 info->fix.smem_len = size;
255 ioremap_wc(ggtt->mappable_base + i915_gem_obj_ggtt_offset(obj),
257 if (!info->screen_base) {
258 DRM_ERROR("Failed to remap framebuffer into virtual memory\n");
260 goto out_destroy_fbi;
262 info->screen_size = size;
264 /* This driver doesn't need a VT switch to restore the mode on resume */
265 info->skip_vt_switch = true;
267 drm_fb_helper_fill_fix(info, fb->pitches[0], fb->depth);
268 drm_fb_helper_fill_var(info, &ifbdev->helper, sizes->fb_width, sizes->fb_height);
270 /* If the object is shmemfs backed, it will have given us zeroed pages.
271 * If the object is stolen however, it will be full of whatever
272 * garbage was left in there.
274 if (ifbdev->fb->obj->stolen && !prealloc)
275 memset_io(info->screen_base, 0, info->screen_size);
277 /* Use default scratch pixmap (info->pixmap.flags = FB_PIXMAP_SYSTEM) */
279 DRM_DEBUG_KMS("allocated %dx%d fb: 0x%08llx, bo %p\n",
280 fb->width, fb->height,
281 i915_gem_obj_ggtt_offset(obj), obj);
283 mutex_unlock(&dev->struct_mutex);
284 vga_switcheroo_client_fb_set(dev->pdev, info);
288 drm_fb_helper_release_fbi(helper);
290 i915_gem_object_ggtt_unpin(obj);
292 mutex_unlock(&dev->struct_mutex);
296 /** Sets the color ramps on behalf of RandR */
297 static void intel_crtc_fb_gamma_set(struct drm_crtc *crtc, u16 red, u16 green,
300 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
302 intel_crtc->lut_r[regno] = red >> 8;
303 intel_crtc->lut_g[regno] = green >> 8;
304 intel_crtc->lut_b[regno] = blue >> 8;
307 static void intel_crtc_fb_gamma_get(struct drm_crtc *crtc, u16 *red, u16 *green,
308 u16 *blue, int regno)
310 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
312 *red = intel_crtc->lut_r[regno] << 8;
313 *green = intel_crtc->lut_g[regno] << 8;
314 *blue = intel_crtc->lut_b[regno] << 8;
317 static struct drm_fb_helper_crtc *
318 intel_fb_helper_crtc(struct drm_fb_helper *fb_helper, struct drm_crtc *crtc)
322 for (i = 0; i < fb_helper->crtc_count; i++)
323 if (fb_helper->crtc_info[i].mode_set.crtc == crtc)
324 return &fb_helper->crtc_info[i];
330 * Try to read the BIOS display configuration and use it for the initial
333 * The BIOS or boot loader will generally create an initial display
334 * configuration for us that includes some set of active pipes and displays.
335 * This routine tries to figure out which pipes and connectors are active
336 * and stuffs them into the crtcs and modes array given to us by the
337 * drm_fb_helper code.
339 * The overall sequence is:
340 * intel_fbdev_init - from driver load
341 * intel_fbdev_init_bios - initialize the intel_fbdev using BIOS data
342 * drm_fb_helper_init - build fb helper structs
343 * drm_fb_helper_single_add_all_connectors - more fb helper structs
344 * intel_fbdev_initial_config - apply the config
345 * drm_fb_helper_initial_config - call ->probe then register_framebuffer()
346 * drm_setup_crtcs - build crtc config for fbdev
347 * intel_fb_initial_config - find active connectors etc
348 * drm_fb_helper_single_fb_probe - set up fbdev
349 * intelfb_create - re-use or alloc fb, build out fbdev structs
351 * Note that we don't make special consideration whether we could actually
352 * switch to the selected modes without a full modeset. E.g. when the display
353 * is in VGA mode we need to recalculate watermarks and set a new high-res
354 * framebuffer anyway.
356 static bool intel_fb_initial_config(struct drm_fb_helper *fb_helper,
357 struct drm_fb_helper_crtc **crtcs,
358 struct drm_display_mode **modes,
359 struct drm_fb_offset *offsets,
360 bool *enabled, int width, int height)
362 struct drm_device *dev = fb_helper->dev;
365 bool fallback = true;
366 int num_connectors_enabled = 0;
367 int num_connectors_detected = 0;
368 uint64_t conn_configured = 0, mask;
371 save_enabled = kcalloc(fb_helper->connector_count, sizeof(bool),
376 memcpy(save_enabled, enabled, fb_helper->connector_count);
377 mask = (1 << fb_helper->connector_count) - 1;
379 for (i = 0; i < fb_helper->connector_count; i++) {
380 struct drm_fb_helper_connector *fb_conn;
381 struct drm_connector *connector;
382 struct drm_encoder *encoder;
383 struct drm_fb_helper_crtc *new_crtc;
384 struct intel_crtc *intel_crtc;
386 fb_conn = fb_helper->connector_info[i];
387 connector = fb_conn->connector;
389 if (conn_configured & (1 << i))
392 if (pass == 0 && !connector->has_tile)
395 if (connector->status == connector_status_connected)
396 num_connectors_detected++;
399 DRM_DEBUG_KMS("connector %s not enabled, skipping\n",
401 conn_configured |= (1 << i);
405 if (connector->force == DRM_FORCE_OFF) {
406 DRM_DEBUG_KMS("connector %s is disabled by user, skipping\n",
412 encoder = connector->state->best_encoder;
413 if (!encoder || WARN_ON(!connector->state->crtc)) {
414 if (connector->force > DRM_FORCE_OFF)
417 DRM_DEBUG_KMS("connector %s has no encoder or crtc, skipping\n",
420 conn_configured |= (1 << i);
424 num_connectors_enabled++;
426 intel_crtc = to_intel_crtc(connector->state->crtc);
427 for (j = 0; j < 256; j++) {
428 intel_crtc->lut_r[j] = j;
429 intel_crtc->lut_g[j] = j;
430 intel_crtc->lut_b[j] = j;
433 new_crtc = intel_fb_helper_crtc(fb_helper, connector->state->crtc);
436 * Make sure we're not trying to drive multiple connectors
437 * with a single CRTC, since our cloning support may not
440 for (j = 0; j < fb_helper->connector_count; j++) {
441 if (crtcs[j] == new_crtc) {
442 DRM_DEBUG_KMS("fallback: cloned configuration\n");
447 DRM_DEBUG_KMS("looking for cmdline mode on connector %s\n",
450 /* go for command line mode first */
451 modes[i] = drm_pick_cmdline_mode(fb_conn, width, height);
453 /* try for preferred next */
455 DRM_DEBUG_KMS("looking for preferred mode on connector %s %d\n",
456 connector->name, connector->has_tile);
457 modes[i] = drm_has_preferred_mode(fb_conn, width,
461 /* No preferred mode marked by the EDID? Are there any modes? */
462 if (!modes[i] && !list_empty(&connector->modes)) {
463 DRM_DEBUG_KMS("using first mode listed on connector %s\n",
465 modes[i] = list_first_entry(&connector->modes,
466 struct drm_display_mode,
470 /* last resort: use current mode */
473 * IMPORTANT: We want to use the adjusted mode (i.e.
474 * after the panel fitter upscaling) as the initial
475 * config, not the input mode, which is what crtc->mode
476 * usually contains. But since our current
477 * code puts a mode derived from the post-pfit timings
478 * into crtc->mode this works out correctly.
480 * This is crtc->mode and not crtc->state->mode for the
481 * fastboot check to work correctly. crtc_state->mode has
482 * I915_MODE_FLAG_INHERITED, which we clear to force check
485 DRM_DEBUG_KMS("looking for current mode on connector %s\n",
487 modes[i] = &connector->state->crtc->mode;
491 DRM_DEBUG_KMS("connector %s on pipe %c [CRTC:%d]: %dx%d%s\n",
493 pipe_name(to_intel_crtc(connector->state->crtc)->pipe),
494 connector->state->crtc->base.id,
495 modes[i]->hdisplay, modes[i]->vdisplay,
496 modes[i]->flags & DRM_MODE_FLAG_INTERLACE ? "i" :"");
499 conn_configured |= (1 << i);
502 if ((conn_configured & mask) != mask) {
508 * If the BIOS didn't enable everything it could, fall back to have the
509 * same user experiencing of lighting up as much as possible like the
510 * fbdev helper library.
512 if (num_connectors_enabled != num_connectors_detected &&
513 num_connectors_enabled < INTEL_INFO(dev)->num_pipes) {
514 DRM_DEBUG_KMS("fallback: Not all outputs enabled\n");
515 DRM_DEBUG_KMS("Enabled: %i, detected: %i\n", num_connectors_enabled,
516 num_connectors_detected);
522 DRM_DEBUG_KMS("Not using firmware configuration\n");
523 memcpy(enabled, save_enabled, fb_helper->connector_count);
532 static const struct drm_fb_helper_funcs intel_fb_helper_funcs = {
533 .initial_config = intel_fb_initial_config,
534 .gamma_set = intel_crtc_fb_gamma_set,
535 .gamma_get = intel_crtc_fb_gamma_get,
536 .fb_probe = intelfb_create,
539 static void intel_fbdev_destroy(struct drm_device *dev,
540 struct intel_fbdev *ifbdev)
542 /* We rely on the object-free to release the VMA pinning for
543 * the info->screen_base mmaping. Leaking the VMA is simpler than
544 * trying to rectify all the possible error paths leading here.
547 drm_fb_helper_unregister_fbi(&ifbdev->helper);
548 drm_fb_helper_release_fbi(&ifbdev->helper);
550 drm_fb_helper_fini(&ifbdev->helper);
553 drm_framebuffer_unregister_private(&ifbdev->fb->base);
554 drm_framebuffer_remove(&ifbdev->fb->base);
559 * Build an intel_fbdev struct using a BIOS allocated framebuffer, if possible.
560 * The core display code will have read out the current plane configuration,
561 * so we use that to figure out if there's an object for us to use as the
562 * fb, and if so, we re-use it for the fbdev configuration.
564 * Note we only support a single fb shared across pipes for boot (mostly for
565 * fbcon), so we just find the biggest and use that.
567 static bool intel_fbdev_init_bios(struct drm_device *dev,
568 struct intel_fbdev *ifbdev)
570 struct intel_framebuffer *fb = NULL;
571 struct drm_crtc *crtc;
572 struct intel_crtc *intel_crtc;
573 unsigned int max_size = 0;
575 /* Find the largest fb */
576 for_each_crtc(dev, crtc) {
577 struct drm_i915_gem_object *obj =
578 intel_fb_obj(crtc->primary->state->fb);
579 intel_crtc = to_intel_crtc(crtc);
581 if (!crtc->state->active || !obj) {
582 DRM_DEBUG_KMS("pipe %c not active or no fb, skipping\n",
583 pipe_name(intel_crtc->pipe));
587 if (obj->base.size > max_size) {
588 DRM_DEBUG_KMS("found possible fb from plane %c\n",
589 pipe_name(intel_crtc->pipe));
590 fb = to_intel_framebuffer(crtc->primary->state->fb);
591 max_size = obj->base.size;
596 DRM_DEBUG_KMS("no active fbs found, not using BIOS config\n");
600 /* Now make sure all the pipes will fit into it */
601 for_each_crtc(dev, crtc) {
602 unsigned int cur_size;
604 intel_crtc = to_intel_crtc(crtc);
606 if (!crtc->state->active) {
607 DRM_DEBUG_KMS("pipe %c not active, skipping\n",
608 pipe_name(intel_crtc->pipe));
612 DRM_DEBUG_KMS("checking plane %c for BIOS fb\n",
613 pipe_name(intel_crtc->pipe));
616 * See if the plane fb we found above will fit on this
617 * pipe. Note we need to use the selected fb's pitch and bpp
618 * rather than the current pipe's, since they differ.
620 cur_size = intel_crtc->config->base.adjusted_mode.crtc_hdisplay;
621 cur_size = cur_size * fb->base.bits_per_pixel / 8;
622 if (fb->base.pitches[0] < cur_size) {
623 DRM_DEBUG_KMS("fb not wide enough for plane %c (%d vs %d)\n",
624 pipe_name(intel_crtc->pipe),
625 cur_size, fb->base.pitches[0]);
630 cur_size = intel_crtc->config->base.adjusted_mode.crtc_vdisplay;
631 cur_size = intel_fb_align_height(dev, cur_size,
632 fb->base.pixel_format,
633 fb->base.modifier[0]);
634 cur_size *= fb->base.pitches[0];
635 DRM_DEBUG_KMS("pipe %c area: %dx%d, bpp: %d, size: %d\n",
636 pipe_name(intel_crtc->pipe),
637 intel_crtc->config->base.adjusted_mode.crtc_hdisplay,
638 intel_crtc->config->base.adjusted_mode.crtc_vdisplay,
639 fb->base.bits_per_pixel,
642 if (cur_size > max_size) {
643 DRM_DEBUG_KMS("fb not big enough for plane %c (%d vs %d)\n",
644 pipe_name(intel_crtc->pipe),
650 DRM_DEBUG_KMS("fb big enough for plane %c (%d >= %d)\n",
651 pipe_name(intel_crtc->pipe),
656 DRM_DEBUG_KMS("BIOS fb not suitable for all pipes, not using\n");
660 ifbdev->preferred_bpp = fb->base.bits_per_pixel;
663 drm_framebuffer_reference(&ifbdev->fb->base);
665 /* Final pass to check if any active pipes don't have fbs */
666 for_each_crtc(dev, crtc) {
667 intel_crtc = to_intel_crtc(crtc);
669 if (!crtc->state->active)
672 WARN(!crtc->primary->fb,
673 "re-used BIOS config but lost an fb on crtc %d\n",
678 DRM_DEBUG_KMS("using BIOS fb for initial console\n");
686 static void intel_fbdev_suspend_worker(struct work_struct *work)
688 intel_fbdev_set_suspend(container_of(work,
689 struct drm_i915_private,
690 fbdev_suspend_work)->dev,
691 FBINFO_STATE_RUNNING,
695 int intel_fbdev_init(struct drm_device *dev)
697 struct intel_fbdev *ifbdev;
698 struct drm_i915_private *dev_priv = dev->dev_private;
701 if (WARN_ON(INTEL_INFO(dev)->num_pipes == 0))
704 ifbdev = kzalloc(sizeof(struct intel_fbdev), GFP_KERNEL);
708 drm_fb_helper_prepare(dev, &ifbdev->helper, &intel_fb_helper_funcs);
710 if (!intel_fbdev_init_bios(dev, ifbdev))
711 ifbdev->preferred_bpp = 32;
713 ret = drm_fb_helper_init(dev, &ifbdev->helper,
714 INTEL_INFO(dev)->num_pipes, 4);
720 ifbdev->helper.atomic = true;
722 dev_priv->fbdev = ifbdev;
723 INIT_WORK(&dev_priv->fbdev_suspend_work, intel_fbdev_suspend_worker);
725 drm_fb_helper_single_add_all_connectors(&ifbdev->helper);
730 static void intel_fbdev_initial_config(void *data, async_cookie_t cookie)
732 struct drm_i915_private *dev_priv = data;
733 struct intel_fbdev *ifbdev = dev_priv->fbdev;
735 /* Due to peculiar init order wrt to hpd handling this is separate. */
736 if (drm_fb_helper_initial_config(&ifbdev->helper,
737 ifbdev->preferred_bpp))
738 intel_fbdev_fini(dev_priv->dev);
741 void intel_fbdev_initial_config_async(struct drm_device *dev)
743 async_schedule(intel_fbdev_initial_config, to_i915(dev));
746 void intel_fbdev_fini(struct drm_device *dev)
748 struct drm_i915_private *dev_priv = dev->dev_private;
749 if (!dev_priv->fbdev)
752 flush_work(&dev_priv->fbdev_suspend_work);
754 if (!current_is_async())
755 async_synchronize_full();
756 intel_fbdev_destroy(dev, dev_priv->fbdev);
757 kfree(dev_priv->fbdev);
758 dev_priv->fbdev = NULL;
761 void intel_fbdev_set_suspend(struct drm_device *dev, int state, bool synchronous)
763 struct drm_i915_private *dev_priv = dev->dev_private;
764 struct intel_fbdev *ifbdev = dev_priv->fbdev;
765 struct fb_info *info;
770 info = ifbdev->helper.fbdev;
773 /* Flush any pending work to turn the console on, and then
774 * wait to turn it off. It must be synchronous as we are
775 * about to suspend or unload the driver.
777 * Note that from within the work-handler, we cannot flush
778 * ourselves, so only flush outstanding work upon suspend!
780 if (state != FBINFO_STATE_RUNNING)
781 flush_work(&dev_priv->fbdev_suspend_work);
785 * The console lock can be pretty contented on resume due
786 * to all the printk activity. Try to keep it out of the hot
787 * path of resume if possible.
789 WARN_ON(state != FBINFO_STATE_RUNNING);
790 if (!console_trylock()) {
791 /* Don't block our own workqueue as this can
792 * be run in parallel with other i915.ko tasks.
794 schedule_work(&dev_priv->fbdev_suspend_work);
799 /* On resume from hibernation: If the object is shmemfs backed, it has
800 * been restored from swap. If the object is stolen however, it will be
801 * full of whatever garbage was left in there.
803 if (state == FBINFO_STATE_RUNNING && ifbdev->fb->obj->stolen)
804 memset_io(info->screen_base, 0, info->screen_size);
806 drm_fb_helper_set_suspend(&ifbdev->helper, state);
810 void intel_fbdev_output_poll_changed(struct drm_device *dev)
812 struct drm_i915_private *dev_priv = dev->dev_private;
814 drm_fb_helper_hotplug_event(&dev_priv->fbdev->helper);
817 void intel_fbdev_restore_mode(struct drm_device *dev)
820 struct drm_i915_private *dev_priv = dev->dev_private;
821 struct intel_fbdev *ifbdev = dev_priv->fbdev;
822 struct drm_fb_helper *fb_helper;
827 fb_helper = &ifbdev->helper;
829 ret = drm_fb_helper_restore_fbdev_mode_unlocked(fb_helper);
831 DRM_DEBUG("failed to restore crtc mode\n");
833 mutex_lock(&fb_helper->dev->struct_mutex);
834 intel_fb_obj_invalidate(ifbdev->fb->obj, ORIGIN_GTT);
835 mutex_unlock(&fb_helper->dev->struct_mutex);