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/console.h>
28 #include <linux/delay.h>
29 #include <linux/errno.h>
30 #include <linux/fb.h>
31 #include <linux/init.h>
32 #include <linux/kernel.h>
33 #include <linux/mm.h>
34 #include <linux/module.h>
35 #include <linux/string.h>
36 #include <linux/sysrq.h>
37 #include <linux/tty.h>
38 #include <linux/vga_switcheroo.h>
39
40 #include <drm/drm_crtc.h>
41 #include <drm/drm_crtc_helper.h>
42 #include <drm/drm_fb_helper.h>
43 #include <drm/drm_fourcc.h>
44 #include <drm/drm_gem_framebuffer_helper.h>
45
46 #include "gem/i915_gem_mman.h"
47 #include "gem/i915_gem_object.h"
48
49 #include "i915_drv.h"
50 #include "intel_display_types.h"
51 #include "intel_fb.h"
52 #include "intel_fb_pin.h"
53 #include "intel_fbdev.h"
54 #include "intel_fbdev_fb.h"
55 #include "intel_frontbuffer.h"
56
57 struct intel_fbdev {
58 struct drm_fb_helper helper;
59 struct intel_framebuffer *fb;
60 struct i915_vma *vma;
61 unsigned long vma_flags;
62 int preferred_bpp;
63
64 /* Whether or not fbdev hpd processing is temporarily suspended */
65 bool hpd_suspended: 1;
66 /* Set when a hotplug was received while HPD processing was suspended */
67 bool hpd_waiting: 1;
68
69 /* Protects hpd_suspended */
70 struct mutex hpd_lock;
71 };
72
to_intel_fbdev(struct drm_fb_helper * fb_helper)73 static struct intel_fbdev *to_intel_fbdev(struct drm_fb_helper *fb_helper)
74 {
75 return container_of(fb_helper, struct intel_fbdev, helper);
76 }
77
to_frontbuffer(struct intel_fbdev * ifbdev)78 static struct intel_frontbuffer *to_frontbuffer(struct intel_fbdev *ifbdev)
79 {
80 return ifbdev->fb->frontbuffer;
81 }
82
intel_fbdev_invalidate(struct intel_fbdev * ifbdev)83 static void intel_fbdev_invalidate(struct intel_fbdev *ifbdev)
84 {
85 intel_frontbuffer_invalidate(to_frontbuffer(ifbdev), ORIGIN_CPU);
86 }
87
FB_GEN_DEFAULT_DEFERRED_IOMEM_OPS(intel_fbdev,drm_fb_helper_damage_range,drm_fb_helper_damage_area)88 FB_GEN_DEFAULT_DEFERRED_IOMEM_OPS(intel_fbdev,
89 drm_fb_helper_damage_range,
90 drm_fb_helper_damage_area)
91
92 static int intel_fbdev_set_par(struct fb_info *info)
93 {
94 struct intel_fbdev *ifbdev = to_intel_fbdev(info->par);
95 int ret;
96
97 ret = drm_fb_helper_set_par(info);
98 if (ret == 0)
99 intel_fbdev_invalidate(ifbdev);
100
101 return ret;
102 }
103
intel_fbdev_blank(int blank,struct fb_info * info)104 static int intel_fbdev_blank(int blank, struct fb_info *info)
105 {
106 struct intel_fbdev *ifbdev = to_intel_fbdev(info->par);
107 int ret;
108
109 ret = drm_fb_helper_blank(blank, info);
110 if (ret == 0)
111 intel_fbdev_invalidate(ifbdev);
112
113 return ret;
114 }
115
intel_fbdev_pan_display(struct fb_var_screeninfo * var,struct fb_info * info)116 static int intel_fbdev_pan_display(struct fb_var_screeninfo *var,
117 struct fb_info *info)
118 {
119 struct intel_fbdev *ifbdev = to_intel_fbdev(info->par);
120 int ret;
121
122 ret = drm_fb_helper_pan_display(var, info);
123 if (ret == 0)
124 intel_fbdev_invalidate(ifbdev);
125
126 return ret;
127 }
128
intel_fbdev_mmap(struct fb_info * info,struct vm_area_struct * vma)129 static int intel_fbdev_mmap(struct fb_info *info, struct vm_area_struct *vma)
130 {
131 struct intel_fbdev *fbdev = to_intel_fbdev(info->par);
132 struct drm_gem_object *bo = drm_gem_fb_get_obj(&fbdev->fb->base, 0);
133 struct drm_i915_gem_object *obj = to_intel_bo(bo);
134
135 return i915_gem_fb_mmap(obj, vma);
136 }
137
intel_fbdev_fb_destroy(struct fb_info * info)138 static void intel_fbdev_fb_destroy(struct fb_info *info)
139 {
140 struct drm_fb_helper *fb_helper = info->par;
141 struct intel_fbdev *ifbdev = container_of(fb_helper, struct intel_fbdev, helper);
142
143 drm_fb_helper_fini(&ifbdev->helper);
144
145 /*
146 * We rely on the object-free to release the VMA pinning for
147 * the info->screen_base mmaping. Leaking the VMA is simpler than
148 * trying to rectify all the possible error paths leading here.
149 */
150 intel_fb_unpin_vma(ifbdev->vma, ifbdev->vma_flags);
151 drm_framebuffer_remove(&ifbdev->fb->base);
152
153 drm_client_release(&fb_helper->client);
154 drm_fb_helper_unprepare(&ifbdev->helper);
155 kfree(ifbdev);
156 }
157
158 __diag_push();
159 __diag_ignore_all("-Woverride-init", "Allow field initialization overrides for fb ops");
160
161 static const struct fb_ops intelfb_ops = {
162 .owner = THIS_MODULE,
163 __FB_DEFAULT_DEFERRED_OPS_RDWR(intel_fbdev),
164 DRM_FB_HELPER_DEFAULT_OPS,
165 .fb_set_par = intel_fbdev_set_par,
166 .fb_blank = intel_fbdev_blank,
167 .fb_pan_display = intel_fbdev_pan_display,
168 __FB_DEFAULT_DEFERRED_OPS_DRAW(intel_fbdev),
169 .fb_mmap = intel_fbdev_mmap,
170 .fb_destroy = intel_fbdev_fb_destroy,
171 };
172
173 __diag_pop();
174
intelfb_create(struct drm_fb_helper * helper,struct drm_fb_helper_surface_size * sizes)175 static int intelfb_create(struct drm_fb_helper *helper,
176 struct drm_fb_helper_surface_size *sizes)
177 {
178 struct intel_fbdev *ifbdev = to_intel_fbdev(helper);
179 struct intel_framebuffer *fb = ifbdev->fb;
180 struct drm_device *dev = helper->dev;
181 struct drm_i915_private *dev_priv = to_i915(dev);
182 const struct i915_gtt_view view = {
183 .type = I915_GTT_VIEW_NORMAL,
184 };
185 intel_wakeref_t wakeref;
186 struct fb_info *info;
187 struct i915_vma *vma;
188 unsigned long flags = 0;
189 bool prealloc = false;
190 struct drm_i915_gem_object *obj;
191 int ret;
192
193 mutex_lock(&ifbdev->hpd_lock);
194 ret = ifbdev->hpd_suspended ? -EAGAIN : 0;
195 mutex_unlock(&ifbdev->hpd_lock);
196 if (ret)
197 return ret;
198
199 ifbdev->fb = NULL;
200
201 if (fb &&
202 (sizes->fb_width > fb->base.width ||
203 sizes->fb_height > fb->base.height)) {
204 drm_dbg_kms(&dev_priv->drm,
205 "BIOS fb too small (%dx%d), we require (%dx%d),"
206 " releasing it\n",
207 fb->base.width, fb->base.height,
208 sizes->fb_width, sizes->fb_height);
209 drm_framebuffer_put(&fb->base);
210 fb = NULL;
211 }
212 if (!fb || drm_WARN_ON(dev, !intel_fb_obj(&fb->base))) {
213 drm_dbg_kms(&dev_priv->drm,
214 "no BIOS fb, allocating a new one\n");
215 fb = intel_fbdev_fb_alloc(helper, sizes);
216 if (IS_ERR(fb))
217 return PTR_ERR(fb);
218 } else {
219 drm_dbg_kms(&dev_priv->drm, "re-using BIOS fb\n");
220 prealloc = true;
221 sizes->fb_width = fb->base.width;
222 sizes->fb_height = fb->base.height;
223 }
224
225 wakeref = intel_runtime_pm_get(&dev_priv->runtime_pm);
226
227 /* Pin the GGTT vma for our access via info->screen_base.
228 * This also validates that any existing fb inherited from the
229 * BIOS is suitable for own access.
230 */
231 vma = intel_fb_pin_to_ggtt(&fb->base, &view,
232 fb->min_alignment, 0,
233 false, &flags);
234 if (IS_ERR(vma)) {
235 ret = PTR_ERR(vma);
236 goto out_unlock;
237 }
238
239 info = drm_fb_helper_alloc_info(helper);
240 if (IS_ERR(info)) {
241 drm_err(&dev_priv->drm, "Failed to allocate fb_info (%pe)\n", info);
242 ret = PTR_ERR(info);
243 goto out_unpin;
244 }
245
246 ifbdev->helper.fb = &fb->base;
247
248 info->fbops = &intelfb_ops;
249
250 obj = intel_fb_obj(&fb->base);
251
252 ret = intel_fbdev_fb_fill_info(dev_priv, info, obj, vma);
253 if (ret)
254 goto out_unpin;
255
256 drm_fb_helper_fill_info(info, &ifbdev->helper, sizes);
257
258 /* If the object is shmemfs backed, it will have given us zeroed pages.
259 * If the object is stolen however, it will be full of whatever
260 * garbage was left in there.
261 */
262 if (!i915_gem_object_is_shmem(obj) && !prealloc)
263 memset_io(info->screen_base, 0, info->screen_size);
264
265 /* Use default scratch pixmap (info->pixmap.flags = FB_PIXMAP_SYSTEM) */
266
267 drm_dbg_kms(&dev_priv->drm, "allocated %dx%d fb: 0x%08x\n",
268 fb->base.width, fb->base.height,
269 i915_ggtt_offset(vma));
270 ifbdev->fb = fb;
271 ifbdev->vma = vma;
272 ifbdev->vma_flags = flags;
273
274 intel_runtime_pm_put(&dev_priv->runtime_pm, wakeref);
275
276 return 0;
277
278 out_unpin:
279 intel_fb_unpin_vma(vma, flags);
280 out_unlock:
281 intel_runtime_pm_put(&dev_priv->runtime_pm, wakeref);
282 return ret;
283 }
284
intelfb_dirty(struct drm_fb_helper * helper,struct drm_clip_rect * clip)285 static int intelfb_dirty(struct drm_fb_helper *helper, struct drm_clip_rect *clip)
286 {
287 if (!(clip->x1 < clip->x2 && clip->y1 < clip->y2))
288 return 0;
289
290 if (helper->fb->funcs->dirty)
291 return helper->fb->funcs->dirty(helper->fb, NULL, 0, 0, clip, 1);
292
293 return 0;
294 }
295
296 static const struct drm_fb_helper_funcs intel_fb_helper_funcs = {
297 .fb_probe = intelfb_create,
298 .fb_dirty = intelfb_dirty,
299 };
300
301 /*
302 * Build an intel_fbdev struct using a BIOS allocated framebuffer, if possible.
303 * The core display code will have read out the current plane configuration,
304 * so we use that to figure out if there's an object for us to use as the
305 * fb, and if so, we re-use it for the fbdev configuration.
306 *
307 * Note we only support a single fb shared across pipes for boot (mostly for
308 * fbcon), so we just find the biggest and use that.
309 */
intel_fbdev_init_bios(struct drm_device * dev,struct intel_fbdev * ifbdev)310 static bool intel_fbdev_init_bios(struct drm_device *dev,
311 struct intel_fbdev *ifbdev)
312 {
313 struct drm_i915_private *i915 = to_i915(dev);
314 struct intel_framebuffer *fb = NULL;
315 struct intel_crtc *crtc;
316 unsigned int max_size = 0;
317
318 /* Find the largest fb */
319 for_each_intel_crtc(dev, crtc) {
320 struct intel_crtc_state *crtc_state =
321 to_intel_crtc_state(crtc->base.state);
322 struct intel_plane *plane =
323 to_intel_plane(crtc->base.primary);
324 struct intel_plane_state *plane_state =
325 to_intel_plane_state(plane->base.state);
326 struct drm_i915_gem_object *obj =
327 intel_fb_obj(plane_state->uapi.fb);
328
329 if (!crtc_state->uapi.active) {
330 drm_dbg_kms(&i915->drm,
331 "[CRTC:%d:%s] not active, skipping\n",
332 crtc->base.base.id, crtc->base.name);
333 continue;
334 }
335
336 if (!obj) {
337 drm_dbg_kms(&i915->drm,
338 "[PLANE:%d:%s] no fb, skipping\n",
339 plane->base.base.id, plane->base.name);
340 continue;
341 }
342
343 if (intel_bo_to_drm_bo(obj)->size > max_size) {
344 drm_dbg_kms(&i915->drm,
345 "found possible fb from [PLANE:%d:%s]\n",
346 plane->base.base.id, plane->base.name);
347 fb = to_intel_framebuffer(plane_state->uapi.fb);
348 max_size = intel_bo_to_drm_bo(obj)->size;
349 }
350 }
351
352 if (!fb) {
353 drm_dbg_kms(&i915->drm,
354 "no active fbs found, not using BIOS config\n");
355 goto out;
356 }
357
358 /* Now make sure all the pipes will fit into it */
359 for_each_intel_crtc(dev, crtc) {
360 struct intel_crtc_state *crtc_state =
361 to_intel_crtc_state(crtc->base.state);
362 struct intel_plane *plane =
363 to_intel_plane(crtc->base.primary);
364 unsigned int cur_size;
365
366 if (!crtc_state->uapi.active) {
367 drm_dbg_kms(&i915->drm,
368 "[CRTC:%d:%s] not active, skipping\n",
369 crtc->base.base.id, crtc->base.name);
370 continue;
371 }
372
373 drm_dbg_kms(&i915->drm, "checking [PLANE:%d:%s] for BIOS fb\n",
374 plane->base.base.id, plane->base.name);
375
376 /*
377 * See if the plane fb we found above will fit on this
378 * pipe. Note we need to use the selected fb's pitch and bpp
379 * rather than the current pipe's, since they differ.
380 */
381 cur_size = crtc_state->uapi.adjusted_mode.crtc_hdisplay;
382 cur_size = cur_size * fb->base.format->cpp[0];
383 if (fb->base.pitches[0] < cur_size) {
384 drm_dbg_kms(&i915->drm,
385 "fb not wide enough for [PLANE:%d:%s] (%d vs %d)\n",
386 plane->base.base.id, plane->base.name,
387 cur_size, fb->base.pitches[0]);
388 fb = NULL;
389 break;
390 }
391
392 cur_size = crtc_state->uapi.adjusted_mode.crtc_vdisplay;
393 cur_size = intel_fb_align_height(&fb->base, 0, cur_size);
394 cur_size *= fb->base.pitches[0];
395 drm_dbg_kms(&i915->drm,
396 "[CRTC:%d:%s] area: %dx%d, bpp: %d, size: %d\n",
397 crtc->base.base.id, crtc->base.name,
398 crtc_state->uapi.adjusted_mode.crtc_hdisplay,
399 crtc_state->uapi.adjusted_mode.crtc_vdisplay,
400 fb->base.format->cpp[0] * 8,
401 cur_size);
402
403 if (cur_size > max_size) {
404 drm_dbg_kms(&i915->drm,
405 "fb not big enough for [PLANE:%d:%s] (%d vs %d)\n",
406 plane->base.base.id, plane->base.name,
407 cur_size, max_size);
408 fb = NULL;
409 break;
410 }
411
412 drm_dbg_kms(&i915->drm,
413 "fb big enough [PLANE:%d:%s] (%d >= %d)\n",
414 plane->base.base.id, plane->base.name,
415 max_size, cur_size);
416 }
417
418 if (!fb) {
419 drm_dbg_kms(&i915->drm,
420 "BIOS fb not suitable for all pipes, not using\n");
421 goto out;
422 }
423
424 ifbdev->preferred_bpp = fb->base.format->cpp[0] * 8;
425 ifbdev->fb = fb;
426
427 drm_framebuffer_get(&ifbdev->fb->base);
428
429 /* Final pass to check if any active pipes don't have fbs */
430 for_each_intel_crtc(dev, crtc) {
431 struct intel_crtc_state *crtc_state =
432 to_intel_crtc_state(crtc->base.state);
433 struct intel_plane *plane =
434 to_intel_plane(crtc->base.primary);
435 struct intel_plane_state *plane_state =
436 to_intel_plane_state(plane->base.state);
437
438 if (!crtc_state->uapi.active)
439 continue;
440
441 drm_WARN(dev, !plane_state->uapi.fb,
442 "re-used BIOS config but lost an fb on [PLANE:%d:%s]\n",
443 plane->base.base.id, plane->base.name);
444 }
445
446
447 drm_dbg_kms(&i915->drm, "using BIOS fb for initial console\n");
448 return true;
449
450 out:
451
452 return false;
453 }
454
intel_fbdev_suspend_worker(struct work_struct * work)455 static void intel_fbdev_suspend_worker(struct work_struct *work)
456 {
457 intel_fbdev_set_suspend(&container_of(work,
458 struct drm_i915_private,
459 display.fbdev.suspend_work)->drm,
460 FBINFO_STATE_RUNNING,
461 true);
462 }
463
464 /* Suspends/resumes fbdev processing of incoming HPD events. When resuming HPD
465 * processing, fbdev will perform a full connector reprobe if a hotplug event
466 * was received while HPD was suspended.
467 */
intel_fbdev_hpd_set_suspend(struct drm_i915_private * i915,int state)468 static void intel_fbdev_hpd_set_suspend(struct drm_i915_private *i915, int state)
469 {
470 struct intel_fbdev *ifbdev = i915->display.fbdev.fbdev;
471 bool send_hpd = false;
472
473 mutex_lock(&ifbdev->hpd_lock);
474 ifbdev->hpd_suspended = state == FBINFO_STATE_SUSPENDED;
475 send_hpd = !ifbdev->hpd_suspended && ifbdev->hpd_waiting;
476 ifbdev->hpd_waiting = false;
477 mutex_unlock(&ifbdev->hpd_lock);
478
479 if (send_hpd) {
480 drm_dbg_kms(&i915->drm, "Handling delayed fbcon HPD event\n");
481 drm_fb_helper_hotplug_event(&ifbdev->helper);
482 }
483 }
484
intel_fbdev_set_suspend(struct drm_device * dev,int state,bool synchronous)485 void intel_fbdev_set_suspend(struct drm_device *dev, int state, bool synchronous)
486 {
487 struct drm_i915_private *dev_priv = to_i915(dev);
488 struct intel_fbdev *ifbdev = dev_priv->display.fbdev.fbdev;
489 struct fb_info *info;
490
491 if (!ifbdev)
492 return;
493
494 if (drm_WARN_ON(&dev_priv->drm, !HAS_DISPLAY(dev_priv)))
495 return;
496
497 if (!ifbdev->vma)
498 goto set_suspend;
499
500 info = ifbdev->helper.info;
501
502 if (synchronous) {
503 /* Flush any pending work to turn the console on, and then
504 * wait to turn it off. It must be synchronous as we are
505 * about to suspend or unload the driver.
506 *
507 * Note that from within the work-handler, we cannot flush
508 * ourselves, so only flush outstanding work upon suspend!
509 */
510 if (state != FBINFO_STATE_RUNNING)
511 flush_work(&dev_priv->display.fbdev.suspend_work);
512
513 console_lock();
514 } else {
515 /*
516 * The console lock can be pretty contented on resume due
517 * to all the printk activity. Try to keep it out of the hot
518 * path of resume if possible.
519 */
520 drm_WARN_ON(dev, state != FBINFO_STATE_RUNNING);
521 if (!console_trylock()) {
522 /* Don't block our own workqueue as this can
523 * be run in parallel with other i915.ko tasks.
524 */
525 queue_work(dev_priv->unordered_wq,
526 &dev_priv->display.fbdev.suspend_work);
527 return;
528 }
529 }
530
531 /* On resume from hibernation: If the object is shmemfs backed, it has
532 * been restored from swap. If the object is stolen however, it will be
533 * full of whatever garbage was left in there.
534 */
535 if (state == FBINFO_STATE_RUNNING &&
536 !i915_gem_object_is_shmem(intel_fb_obj(&ifbdev->fb->base)))
537 memset_io(info->screen_base, 0, info->screen_size);
538
539 drm_fb_helper_set_suspend(&ifbdev->helper, state);
540 console_unlock();
541
542 set_suspend:
543 intel_fbdev_hpd_set_suspend(dev_priv, state);
544 }
545
intel_fbdev_output_poll_changed(struct drm_device * dev)546 static int intel_fbdev_output_poll_changed(struct drm_device *dev)
547 {
548 struct intel_fbdev *ifbdev = to_i915(dev)->display.fbdev.fbdev;
549 bool send_hpd;
550
551 if (!ifbdev)
552 return -EINVAL;
553
554 mutex_lock(&ifbdev->hpd_lock);
555 send_hpd = !ifbdev->hpd_suspended;
556 ifbdev->hpd_waiting = true;
557 mutex_unlock(&ifbdev->hpd_lock);
558
559 if (send_hpd && (ifbdev->vma || ifbdev->helper.deferred_setup))
560 drm_fb_helper_hotplug_event(&ifbdev->helper);
561
562 return 0;
563 }
564
intel_fbdev_restore_mode(struct drm_i915_private * dev_priv)565 static int intel_fbdev_restore_mode(struct drm_i915_private *dev_priv)
566 {
567 struct intel_fbdev *ifbdev = dev_priv->display.fbdev.fbdev;
568 int ret;
569
570 if (!ifbdev)
571 return -EINVAL;
572
573 if (!ifbdev->vma)
574 return -ENOMEM;
575
576 ret = drm_fb_helper_restore_fbdev_mode_unlocked(&ifbdev->helper);
577 if (ret)
578 return ret;
579
580 intel_fbdev_invalidate(ifbdev);
581
582 return 0;
583 }
584
585 /*
586 * Fbdev client and struct drm_client_funcs
587 */
588
intel_fbdev_client_unregister(struct drm_client_dev * client)589 static void intel_fbdev_client_unregister(struct drm_client_dev *client)
590 {
591 struct drm_fb_helper *fb_helper = drm_fb_helper_from_client(client);
592 struct drm_device *dev = fb_helper->dev;
593 struct pci_dev *pdev = to_pci_dev(dev->dev);
594
595 if (fb_helper->info) {
596 vga_switcheroo_client_fb_set(pdev, NULL);
597 drm_fb_helper_unregister_info(fb_helper);
598 } else {
599 drm_fb_helper_unprepare(fb_helper);
600 drm_client_release(&fb_helper->client);
601 kfree(fb_helper);
602 }
603 }
604
intel_fbdev_client_restore(struct drm_client_dev * client)605 static int intel_fbdev_client_restore(struct drm_client_dev *client)
606 {
607 struct drm_i915_private *dev_priv = to_i915(client->dev);
608 int ret;
609
610 ret = intel_fbdev_restore_mode(dev_priv);
611 if (ret)
612 return ret;
613
614 vga_switcheroo_process_delayed_switch();
615
616 return 0;
617 }
618
intel_fbdev_client_hotplug(struct drm_client_dev * client)619 static int intel_fbdev_client_hotplug(struct drm_client_dev *client)
620 {
621 struct drm_fb_helper *fb_helper = drm_fb_helper_from_client(client);
622 struct drm_device *dev = client->dev;
623 struct pci_dev *pdev = to_pci_dev(dev->dev);
624 int ret;
625
626 if (dev->fb_helper)
627 return intel_fbdev_output_poll_changed(dev);
628
629 ret = drm_fb_helper_init(dev, fb_helper);
630 if (ret)
631 goto err_drm_err;
632
633 ret = drm_fb_helper_initial_config(fb_helper);
634 if (ret)
635 goto err_drm_fb_helper_fini;
636
637 vga_switcheroo_client_fb_set(pdev, fb_helper->info);
638
639 return 0;
640
641 err_drm_fb_helper_fini:
642 drm_fb_helper_fini(fb_helper);
643 err_drm_err:
644 drm_err(dev, "Failed to setup i915 fbdev emulation (ret=%d)\n", ret);
645 return ret;
646 }
647
648 static const struct drm_client_funcs intel_fbdev_client_funcs = {
649 .owner = THIS_MODULE,
650 .unregister = intel_fbdev_client_unregister,
651 .restore = intel_fbdev_client_restore,
652 .hotplug = intel_fbdev_client_hotplug,
653 };
654
intel_fbdev_setup(struct drm_i915_private * i915)655 void intel_fbdev_setup(struct drm_i915_private *i915)
656 {
657 struct drm_device *dev = &i915->drm;
658 struct intel_fbdev *ifbdev;
659 int ret;
660
661 if (!HAS_DISPLAY(i915))
662 return;
663
664 ifbdev = kzalloc(sizeof(*ifbdev), GFP_KERNEL);
665 if (!ifbdev)
666 return;
667 drm_fb_helper_prepare(dev, &ifbdev->helper, 32, &intel_fb_helper_funcs);
668
669 i915->display.fbdev.fbdev = ifbdev;
670 INIT_WORK(&i915->display.fbdev.suspend_work, intel_fbdev_suspend_worker);
671 mutex_init(&ifbdev->hpd_lock);
672 if (intel_fbdev_init_bios(dev, ifbdev))
673 ifbdev->helper.preferred_bpp = ifbdev->preferred_bpp;
674 else
675 ifbdev->preferred_bpp = ifbdev->helper.preferred_bpp;
676
677 ret = drm_client_init(dev, &ifbdev->helper.client, "intel-fbdev",
678 &intel_fbdev_client_funcs);
679 if (ret) {
680 drm_err(dev, "Failed to register client: %d\n", ret);
681 goto err_drm_fb_helper_unprepare;
682 }
683
684 drm_client_register(&ifbdev->helper.client);
685
686 return;
687
688 err_drm_fb_helper_unprepare:
689 drm_fb_helper_unprepare(&ifbdev->helper);
690 mutex_destroy(&ifbdev->hpd_lock);
691 kfree(ifbdev);
692 }
693
intel_fbdev_framebuffer(struct intel_fbdev * fbdev)694 struct intel_framebuffer *intel_fbdev_framebuffer(struct intel_fbdev *fbdev)
695 {
696 if (!fbdev || !fbdev->helper.fb)
697 return NULL;
698
699 return to_intel_framebuffer(fbdev->helper.fb);
700 }
701