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1/*
2 * Copyright © 2007 David Airlie
3 *
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:
10 *
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
13 * Software.
14 *
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.
22 *
23 * Authors:
24 * David Airlie
25 */
26
27#include <linux/module.h>
28#include <linux/kernel.h>
29#include <linux/errno.h>
30#include <linux/string.h>
31#include <linux/mm.h>
32#include <linux/tty.h>
33#include <linux/sysrq.h>
34#include <linux/delay.h>
35#include <linux/fb.h>
36#include <linux/init.h>
37#include <linux/vga_switcheroo.h>
38
39#include <drm/drmP.h>
40#include <drm/drm_crtc.h>
41#include <drm/drm_fb_helper.h>
42#include "intel_drv.h"
43#include <drm/i915_drm.h>
44#include "i915_drv.h"
45
46static struct fb_ops intelfb_ops = {
47 .owner = THIS_MODULE,
48 .fb_check_var = drm_fb_helper_check_var,
49 .fb_set_par = drm_fb_helper_set_par,
50 .fb_fillrect = cfb_fillrect,
51 .fb_copyarea = cfb_copyarea,
52 .fb_imageblit = cfb_imageblit,
53 .fb_pan_display = drm_fb_helper_pan_display,
54 .fb_blank = drm_fb_helper_blank,
55 .fb_setcmap = drm_fb_helper_setcmap,
56 .fb_debug_enter = drm_fb_helper_debug_enter,
57 .fb_debug_leave = drm_fb_helper_debug_leave,
58};
59
60static int intelfb_alloc(struct drm_fb_helper *helper,
61 struct drm_fb_helper_surface_size *sizes)
62{
63 struct intel_fbdev *ifbdev =
64 container_of(helper, struct intel_fbdev, helper);
65 struct drm_framebuffer *fb;
66 struct drm_device *dev = helper->dev;
67 struct drm_mode_fb_cmd2 mode_cmd = {};
68 struct drm_i915_gem_object *obj;
69 int size, ret;
70
71 /* we don't do packed 24bpp */
72 if (sizes->surface_bpp == 24)
73 sizes->surface_bpp = 32;
74
75 mode_cmd.width = sizes->surface_width;
76 mode_cmd.height = sizes->surface_height;
77
78 mode_cmd.pitches[0] = ALIGN(mode_cmd.width *
79 DIV_ROUND_UP(sizes->surface_bpp, 8), 64);
80 mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp,
81 sizes->surface_depth);
82
83 size = mode_cmd.pitches[0] * mode_cmd.height;
84 size = ALIGN(size, PAGE_SIZE);
85 obj = i915_gem_object_create_stolen(dev, size);
86 if (obj == NULL)
87 obj = i915_gem_alloc_object(dev, size);
88 if (!obj) {
89 DRM_ERROR("failed to allocate framebuffer\n");
90 ret = -ENOMEM;
91 goto out;
92 }
93
94 /* Flush everything out, we'll be doing GTT only from now on */
95 ret = intel_pin_and_fence_fb_obj(dev, obj, NULL);
96 if (ret) {
97 DRM_ERROR("failed to pin obj: %d\n", ret);
98 goto out_unref;
99 }
100
101 fb = __intel_framebuffer_create(dev, &mode_cmd, obj);
102 if (IS_ERR(fb)) {
103 ret = PTR_ERR(fb);
104 goto out_unpin;
105 }
106
107 ifbdev->fb = to_intel_framebuffer(fb);
108
109 return 0;
110
111out_unpin:
112 i915_gem_object_ggtt_unpin(obj);
113out_unref:
114 drm_gem_object_unreference(&obj->base);
115out:
116 return ret;
117}
118
119static int intelfb_create(struct drm_fb_helper *helper,
120 struct drm_fb_helper_surface_size *sizes)
121{
122 struct intel_fbdev *ifbdev =
123 container_of(helper, struct intel_fbdev, helper);
124 struct intel_framebuffer *intel_fb = ifbdev->fb;
125 struct drm_device *dev = helper->dev;
126 struct drm_i915_private *dev_priv = dev->dev_private;
127 struct fb_info *info;
128 struct drm_framebuffer *fb;
129 struct drm_i915_gem_object *obj;
130 int size, ret;
131 bool prealloc = false;
132
133 mutex_lock(&dev->struct_mutex);
134
135 if (intel_fb &&
136 (sizes->fb_width > intel_fb->base.width ||
137 sizes->fb_height > intel_fb->base.height)) {
138 DRM_DEBUG_KMS("BIOS fb too small (%dx%d), we require (%dx%d),"
139 " releasing it\n",
140 intel_fb->base.width, intel_fb->base.height,
141 sizes->fb_width, sizes->fb_height);
142 drm_framebuffer_unreference(&intel_fb->base);
143 intel_fb = ifbdev->fb = NULL;
144 }
145 if (!intel_fb || WARN_ON(!intel_fb->obj)) {
146 DRM_DEBUG_KMS("no BIOS fb, allocating a new one\n");
147 ret = intelfb_alloc(helper, sizes);
148 if (ret)
149 goto out_unlock;
150 intel_fb = ifbdev->fb;
151 } else {
152 DRM_DEBUG_KMS("re-using BIOS fb\n");
153 prealloc = true;
154 sizes->fb_width = intel_fb->base.width;
155 sizes->fb_height = intel_fb->base.height;
156 }
157
158 obj = intel_fb->obj;
159 size = obj->base.size;
160
161 info = framebuffer_alloc(0, &dev->pdev->dev);
162 if (!info) {
163 ret = -ENOMEM;
164 goto out_unpin;
165 }
166
167 info->par = helper;
168
169 fb = &ifbdev->fb->base;
170
171 ifbdev->helper.fb = fb;
172 ifbdev->helper.fbdev = info;
173
174 strcpy(info->fix.id, "inteldrmfb");
175
176 info->flags = FBINFO_DEFAULT | FBINFO_CAN_FORCE_OUTPUT;
177 info->fbops = &intelfb_ops;
178
179 ret = fb_alloc_cmap(&info->cmap, 256, 0);
180 if (ret) {
181 ret = -ENOMEM;
182 goto out_unpin;
183 }
184 /* setup aperture base/size for vesafb takeover */
185 info->apertures = alloc_apertures(1);
186 if (!info->apertures) {
187 ret = -ENOMEM;
188 goto out_unpin;
189 }
190 info->apertures->ranges[0].base = dev->mode_config.fb_base;
191 info->apertures->ranges[0].size = dev_priv->gtt.mappable_end;
192
193 info->fix.smem_start = dev->mode_config.fb_base + i915_gem_obj_ggtt_offset(obj);
194 info->fix.smem_len = size;
195
196 info->screen_base =
197 ioremap_wc(dev_priv->gtt.mappable_base + i915_gem_obj_ggtt_offset(obj),
198 size);
199 if (!info->screen_base) {
200 ret = -ENOSPC;
201 goto out_unpin;
202 }
203 info->screen_size = size;
204
205 /* This driver doesn't need a VT switch to restore the mode on resume */
206 info->skip_vt_switch = true;
207
208 drm_fb_helper_fill_fix(info, fb->pitches[0], fb->depth);
209 drm_fb_helper_fill_var(info, &ifbdev->helper, sizes->fb_width, sizes->fb_height);
210
211 /* If the object is shmemfs backed, it will have given us zeroed pages.
212 * If the object is stolen however, it will be full of whatever
213 * garbage was left in there.
214 */
215 if (ifbdev->fb->obj->stolen && !prealloc)
216 memset_io(info->screen_base, 0, info->screen_size);
217
218 /* Use default scratch pixmap (info->pixmap.flags = FB_PIXMAP_SYSTEM) */
219
220 DRM_DEBUG_KMS("allocated %dx%d fb: 0x%08lx, bo %p\n",
221 fb->width, fb->height,
222 i915_gem_obj_ggtt_offset(obj), obj);
223
224 mutex_unlock(&dev->struct_mutex);
225 vga_switcheroo_client_fb_set(dev->pdev, info);
226 return 0;
227
228out_unpin:
229 i915_gem_object_ggtt_unpin(obj);
230 drm_gem_object_unreference(&obj->base);
231out_unlock:
232 mutex_unlock(&dev->struct_mutex);
233 return ret;
234}
235
236/** Sets the color ramps on behalf of RandR */
237static void intel_crtc_fb_gamma_set(struct drm_crtc *crtc, u16 red, u16 green,
238 u16 blue, int regno)
239{
240 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
241
242 intel_crtc->lut_r[regno] = red >> 8;
243 intel_crtc->lut_g[regno] = green >> 8;
244 intel_crtc->lut_b[regno] = blue >> 8;
245}
246
247static void intel_crtc_fb_gamma_get(struct drm_crtc *crtc, u16 *red, u16 *green,
248 u16 *blue, int regno)
249{
250 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
251
252 *red = intel_crtc->lut_r[regno] << 8;
253 *green = intel_crtc->lut_g[regno] << 8;
254 *blue = intel_crtc->lut_b[regno] << 8;
255}
256
257static struct drm_fb_helper_crtc *
258intel_fb_helper_crtc(struct drm_fb_helper *fb_helper, struct drm_crtc *crtc)
259{
260 int i;
261
262 for (i = 0; i < fb_helper->crtc_count; i++)
263 if (fb_helper->crtc_info[i].mode_set.crtc == crtc)
264 return &fb_helper->crtc_info[i];
265
266 return NULL;
267}
268
269/*
270 * Try to read the BIOS display configuration and use it for the initial
271 * fb configuration.
272 *
273 * The BIOS or boot loader will generally create an initial display
274 * configuration for us that includes some set of active pipes and displays.
275 * This routine tries to figure out which pipes and connectors are active
276 * and stuffs them into the crtcs and modes array given to us by the
277 * drm_fb_helper code.
278 *
279 * The overall sequence is:
280 * intel_fbdev_init - from driver load
281 * intel_fbdev_init_bios - initialize the intel_fbdev using BIOS data
282 * drm_fb_helper_init - build fb helper structs
283 * drm_fb_helper_single_add_all_connectors - more fb helper structs
284 * intel_fbdev_initial_config - apply the config
285 * drm_fb_helper_initial_config - call ->probe then register_framebuffer()
286 * drm_setup_crtcs - build crtc config for fbdev
287 * intel_fb_initial_config - find active connectors etc
288 * drm_fb_helper_single_fb_probe - set up fbdev
289 * intelfb_create - re-use or alloc fb, build out fbdev structs
290 *
291 * Note that we don't make special consideration whether we could actually
292 * switch to the selected modes without a full modeset. E.g. when the display
293 * is in VGA mode we need to recalculate watermarks and set a new high-res
294 * framebuffer anyway.
295 */
296static bool intel_fb_initial_config(struct drm_fb_helper *fb_helper,
297 struct drm_fb_helper_crtc **crtcs,
298 struct drm_display_mode **modes,
299 bool *enabled, int width, int height)
300{
301 struct drm_device *dev = fb_helper->dev;
302 int i, j;
303 bool *save_enabled;
304 bool fallback = true;
305 int num_connectors_enabled = 0;
306 int num_connectors_detected = 0;
307
308 /*
309 * If the user specified any force options, just bail here
310 * and use that config.
311 */
312 for (i = 0; i < fb_helper->connector_count; i++) {
313 struct drm_fb_helper_connector *fb_conn;
314 struct drm_connector *connector;
315
316 fb_conn = fb_helper->connector_info[i];
317 connector = fb_conn->connector;
318
319 if (!enabled[i])
320 continue;
321
322 if (connector->force != DRM_FORCE_UNSPECIFIED)
323 return false;
324 }
325
326 save_enabled = kcalloc(dev->mode_config.num_connector, sizeof(bool),
327 GFP_KERNEL);
328 if (!save_enabled)
329 return false;
330
331 memcpy(save_enabled, enabled, dev->mode_config.num_connector);
332
333 for (i = 0; i < fb_helper->connector_count; i++) {
334 struct drm_fb_helper_connector *fb_conn;
335 struct drm_connector *connector;
336 struct drm_encoder *encoder;
337 struct drm_fb_helper_crtc *new_crtc;
338
339 fb_conn = fb_helper->connector_info[i];
340 connector = fb_conn->connector;
341
342 if (connector->status == connector_status_connected)
343 num_connectors_detected++;
344
345 if (!enabled[i]) {
346 DRM_DEBUG_KMS("connector %d not enabled, skipping\n",
347 connector->base.id);
348 continue;
349 }
350
351 encoder = connector->encoder;
352 if (!encoder || WARN_ON(!encoder->crtc)) {
353 DRM_DEBUG_KMS("connector %d has no encoder or crtc, skipping\n",
354 connector->base.id);
355 enabled[i] = false;
356 continue;
357 }
358
359 num_connectors_enabled++;
360
361 new_crtc = intel_fb_helper_crtc(fb_helper, encoder->crtc);
362
363 /*
364 * Make sure we're not trying to drive multiple connectors
365 * with a single CRTC, since our cloning support may not
366 * match the BIOS.
367 */
368 for (j = 0; j < fb_helper->connector_count; j++) {
369 if (crtcs[j] == new_crtc) {
370 DRM_DEBUG_KMS("fallback: cloned configuration\n");
371 fallback = true;
372 goto out;
373 }
374 }
375
376 DRM_DEBUG_KMS("looking for cmdline mode on connector %d\n",
377 fb_conn->connector->base.id);
378
379 /* go for command line mode first */
380 modes[i] = drm_pick_cmdline_mode(fb_conn, width, height);
381
382 /* try for preferred next */
383 if (!modes[i]) {
384 DRM_DEBUG_KMS("looking for preferred mode on connector %d\n",
385 fb_conn->connector->base.id);
386 modes[i] = drm_has_preferred_mode(fb_conn, width,
387 height);
388 }
389
390 /* No preferred mode marked by the EDID? Are there any modes? */
391 if (!modes[i] && !list_empty(&connector->modes)) {
392 DRM_DEBUG_KMS("using first mode listed on connector %s\n",
393 drm_get_connector_name(connector));
394 modes[i] = list_first_entry(&connector->modes,
395 struct drm_display_mode,
396 head);
397 }
398
399 /* last resort: use current mode */
400 if (!modes[i]) {
401 /*
402 * IMPORTANT: We want to use the adjusted mode (i.e.
403 * after the panel fitter upscaling) as the initial
404 * config, not the input mode, which is what crtc->mode
405 * usually contains. But since our current fastboot
406 * code puts a mode derived from the post-pfit timings
407 * into crtc->mode this works out correctly. We don't
408 * use hwmode anywhere right now, so use it for this
409 * since the fb helper layer wants a pointer to
410 * something we own.
411 */
412 intel_mode_from_pipe_config(&encoder->crtc->hwmode,
413 &to_intel_crtc(encoder->crtc)->config);
414 modes[i] = &encoder->crtc->hwmode;
415 }
416 crtcs[i] = new_crtc;
417
418 DRM_DEBUG_KMS("connector %s on crtc %d: %s\n",
419 drm_get_connector_name(connector),
420 encoder->crtc->base.id,
421 modes[i]->name);
422
423 fallback = false;
424 }
425
426 /*
427 * If the BIOS didn't enable everything it could, fall back to have the
428 * same user experiencing of lighting up as much as possible like the
429 * fbdev helper library.
430 */
431 if (num_connectors_enabled != num_connectors_detected &&
432 num_connectors_enabled < INTEL_INFO(dev)->num_pipes) {
433 DRM_DEBUG_KMS("fallback: Not all outputs enabled\n");
434 DRM_DEBUG_KMS("Enabled: %i, detected: %i\n", num_connectors_enabled,
435 num_connectors_detected);
436 fallback = true;
437 }
438
439out:
440 if (fallback) {
441 DRM_DEBUG_KMS("Not using firmware configuration\n");
442 memcpy(enabled, save_enabled, dev->mode_config.num_connector);
443 kfree(save_enabled);
444 return false;
445 }
446
447 kfree(save_enabled);
448 return true;
449}
450
451static struct drm_fb_helper_funcs intel_fb_helper_funcs = {
452 .initial_config = intel_fb_initial_config,
453 .gamma_set = intel_crtc_fb_gamma_set,
454 .gamma_get = intel_crtc_fb_gamma_get,
455 .fb_probe = intelfb_create,
456};
457
458static void intel_fbdev_destroy(struct drm_device *dev,
459 struct intel_fbdev *ifbdev)
460{
461 if (ifbdev->helper.fbdev) {
462 struct fb_info *info = ifbdev->helper.fbdev;
463
464 unregister_framebuffer(info);
465 iounmap(info->screen_base);
466 if (info->cmap.len)
467 fb_dealloc_cmap(&info->cmap);
468
469 framebuffer_release(info);
470 }
471
472 drm_fb_helper_fini(&ifbdev->helper);
473
474 drm_framebuffer_unregister_private(&ifbdev->fb->base);
475 drm_framebuffer_remove(&ifbdev->fb->base);
476}
477
478/*
479 * Build an intel_fbdev struct using a BIOS allocated framebuffer, if possible.
480 * The core display code will have read out the current plane configuration,
481 * so we use that to figure out if there's an object for us to use as the
482 * fb, and if so, we re-use it for the fbdev configuration.
483 *
484 * Note we only support a single fb shared across pipes for boot (mostly for
485 * fbcon), so we just find the biggest and use that.
486 */
487static bool intel_fbdev_init_bios(struct drm_device *dev,
488 struct intel_fbdev *ifbdev)
489{
490 struct intel_framebuffer *fb = NULL;
491 struct drm_crtc *crtc;
492 struct intel_crtc *intel_crtc;
493 struct intel_plane_config *plane_config = NULL;
494 unsigned int max_size = 0;
495
496 if (!i915.fastboot)
497 return false;
498
499 /* Find the largest fb */
500 list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
501 intel_crtc = to_intel_crtc(crtc);
502
503 if (!intel_crtc->active || !crtc->primary->fb) {
504 DRM_DEBUG_KMS("pipe %c not active or no fb, skipping\n",
505 pipe_name(intel_crtc->pipe));
506 continue;
507 }
508
509 if (intel_crtc->plane_config.size > max_size) {
510 DRM_DEBUG_KMS("found possible fb from plane %c\n",
511 pipe_name(intel_crtc->pipe));
512 plane_config = &intel_crtc->plane_config;
513 fb = to_intel_framebuffer(crtc->primary->fb);
514 max_size = plane_config->size;
515 }
516 }
517
518 if (!fb) {
519 DRM_DEBUG_KMS("no active fbs found, not using BIOS config\n");
520 goto out;
521 }
522
523 /* Now make sure all the pipes will fit into it */
524 list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
525 unsigned int cur_size;
526
527 intel_crtc = to_intel_crtc(crtc);
528
529 if (!intel_crtc->active) {
530 DRM_DEBUG_KMS("pipe %c not active, skipping\n",
531 pipe_name(intel_crtc->pipe));
532 continue;
533 }
534
535 DRM_DEBUG_KMS("checking plane %c for BIOS fb\n",
536 pipe_name(intel_crtc->pipe));
537
538 /*
539 * See if the plane fb we found above will fit on this
540 * pipe. Note we need to use the selected fb's pitch and bpp
541 * rather than the current pipe's, since they differ.
542 */
543 cur_size = intel_crtc->config.adjusted_mode.crtc_hdisplay;
544 cur_size = cur_size * fb->base.bits_per_pixel / 8;
545 if (fb->base.pitches[0] < cur_size) {
546 DRM_DEBUG_KMS("fb not wide enough for plane %c (%d vs %d)\n",
547 pipe_name(intel_crtc->pipe),
548 cur_size, fb->base.pitches[0]);
549 plane_config = NULL;
550 fb = NULL;
551 break;
552 }
553
554 cur_size = intel_crtc->config.adjusted_mode.crtc_vdisplay;
555 cur_size = ALIGN(cur_size, plane_config->tiled ? (IS_GEN2(dev) ? 16 : 8) : 1);
556 cur_size *= fb->base.pitches[0];
557 DRM_DEBUG_KMS("pipe %c area: %dx%d, bpp: %d, size: %d\n",
558 pipe_name(intel_crtc->pipe),
559 intel_crtc->config.adjusted_mode.crtc_hdisplay,
560 intel_crtc->config.adjusted_mode.crtc_vdisplay,
561 fb->base.bits_per_pixel,
562 cur_size);
563
564 if (cur_size > max_size) {
565 DRM_DEBUG_KMS("fb not big enough for plane %c (%d vs %d)\n",
566 pipe_name(intel_crtc->pipe),
567 cur_size, max_size);
568 plane_config = NULL;
569 fb = NULL;
570 break;
571 }
572
573 DRM_DEBUG_KMS("fb big enough for plane %c (%d >= %d)\n",
574 pipe_name(intel_crtc->pipe),
575 max_size, cur_size);
576 }
577
578 if (!fb) {
579 DRM_DEBUG_KMS("BIOS fb not suitable for all pipes, not using\n");
580 goto out;
581 }
582
583 ifbdev->preferred_bpp = fb->base.bits_per_pixel;
584 ifbdev->fb = fb;
585
586 drm_framebuffer_reference(&ifbdev->fb->base);
587
588 /* Final pass to check if any active pipes don't have fbs */
589 list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
590 intel_crtc = to_intel_crtc(crtc);
591
592 if (!intel_crtc->active)
593 continue;
594
595 WARN(!crtc->primary->fb,
596 "re-used BIOS config but lost an fb on crtc %d\n",
597 crtc->base.id);
598 }
599
600
601 DRM_DEBUG_KMS("using BIOS fb for initial console\n");
602 return true;
603
604out:
605
606 return false;
607}
608
609int intel_fbdev_init(struct drm_device *dev)
610{
611 struct intel_fbdev *ifbdev;
612 struct drm_i915_private *dev_priv = dev->dev_private;
613 int ret;
614
615 if (WARN_ON(INTEL_INFO(dev)->num_pipes == 0))
616 return -ENODEV;
617
618 ifbdev = kzalloc(sizeof(struct intel_fbdev), GFP_KERNEL);
619 if (ifbdev == NULL)
620 return -ENOMEM;
621
622 ifbdev->helper.funcs = &intel_fb_helper_funcs;
623 if (!intel_fbdev_init_bios(dev, ifbdev))
624 ifbdev->preferred_bpp = 32;
625
626 ret = drm_fb_helper_init(dev, &ifbdev->helper,
627 INTEL_INFO(dev)->num_pipes, 4);
628 if (ret) {
629 kfree(ifbdev);
630 return ret;
631 }
632
633 dev_priv->fbdev = ifbdev;
634 drm_fb_helper_single_add_all_connectors(&ifbdev->helper);
635
636 return 0;
637}
638
639void intel_fbdev_initial_config(struct drm_device *dev)
640{
641 struct drm_i915_private *dev_priv = dev->dev_private;
642 struct intel_fbdev *ifbdev = dev_priv->fbdev;
643
644 /* Due to peculiar init order wrt to hpd handling this is separate. */
645 drm_fb_helper_initial_config(&ifbdev->helper, ifbdev->preferred_bpp);
646}
647
648void intel_fbdev_fini(struct drm_device *dev)
649{
650 struct drm_i915_private *dev_priv = dev->dev_private;
651 if (!dev_priv->fbdev)
652 return;
653
654 intel_fbdev_destroy(dev, dev_priv->fbdev);
655 kfree(dev_priv->fbdev);
656 dev_priv->fbdev = NULL;
657}
658
659void intel_fbdev_set_suspend(struct drm_device *dev, int state)
660{
661 struct drm_i915_private *dev_priv = dev->dev_private;
662 struct intel_fbdev *ifbdev = dev_priv->fbdev;
663 struct fb_info *info;
664
665 if (!ifbdev)
666 return;
667
668 info = ifbdev->helper.fbdev;
669
670 /* On resume from hibernation: If the object is shmemfs backed, it has
671 * been restored from swap. If the object is stolen however, it will be
672 * full of whatever garbage was left in there.
673 */
674 if (state == FBINFO_STATE_RUNNING && ifbdev->fb->obj->stolen)
675 memset_io(info->screen_base, 0, info->screen_size);
676
677 fb_set_suspend(info, state);
678}
679
680void intel_fbdev_output_poll_changed(struct drm_device *dev)
681{
682 struct drm_i915_private *dev_priv = dev->dev_private;
683 if (dev_priv->fbdev)
684 drm_fb_helper_hotplug_event(&dev_priv->fbdev->helper);
685}
686
687void intel_fbdev_restore_mode(struct drm_device *dev)
688{
689 int ret;
690 struct drm_i915_private *dev_priv = dev->dev_private;
691
692 if (!dev_priv->fbdev)
693 return;
694
695 drm_modeset_lock_all(dev);
696
697 ret = drm_fb_helper_restore_fbdev_mode(&dev_priv->fbdev->helper);
698 if (ret)
699 DRM_DEBUG("failed to restore crtc mode\n");
700
701 drm_modeset_unlock_all(dev);
702}