1 /* $NetBSD: nouveau_fbcon.c,v 1.16 2021/12/20 20:34:58 chs Exp $ */
2
3 /*
4 * Copyright © 2007 David Airlie
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the "Software"),
8 * to deal in the Software without restriction, including without limitation
9 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
10 * and/or sell copies of the Software, and to permit persons to whom the
11 * Software is furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice (including the next
14 * paragraph) shall be included in all copies or substantial portions of the
15 * Software.
16 *
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
18 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
20 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
21 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
22 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
23 * DEALINGS IN THE SOFTWARE.
24 *
25 * Authors:
26 * David Airlie
27 */
28
29 #include <sys/cdefs.h>
30 __KERNEL_RCSID(0, "$NetBSD: nouveau_fbcon.c,v 1.16 2021/12/20 20:34:58 chs Exp $");
31
32 #include <linux/module.h>
33 #include <linux/kernel.h>
34 #include <linux/errno.h>
35 #include <linux/string.h>
36 #include <linux/mm.h>
37 #include <linux/tty.h>
38 #include <linux/sysrq.h>
39 #include <linux/delay.h>
40 #include <linux/init.h>
41 #include <linux/screen_info.h>
42 #include <linux/vga_switcheroo.h>
43 #include <linux/console.h>
44
45 #include <drm/drm_crtc.h>
46 #include <drm/drm_crtc_helper.h>
47 #include <drm/drm_fb_helper.h>
48 #include <drm/drm_fourcc.h>
49 #include <drm/drm_atomic.h>
50
51 #include "nouveau_drv.h"
52 #include "nouveau_gem.h"
53 #include "nouveau_bo.h"
54 #include "nouveau_fbcon.h"
55 #include "nouveau_chan.h"
56 #include "nouveau_vmm.h"
57
58 #include "nouveau_crtc.h"
59
60 #ifdef __NetBSD__
61 #include "nouveaufb.h"
62 #include <linux/nbsd-namespace.h>
63 #endif
64
65 #ifdef __NetBSD__ /* XXX nouveau fbaccel */
66 int nouveau_nofbaccel = 1;
67 #else
68 MODULE_PARM_DESC(nofbaccel, "Disable fbcon acceleration");
69 int nouveau_nofbaccel = 0;
70 module_param_named(nofbaccel, nouveau_nofbaccel, int, 0400);
71 #endif
72
73 MODULE_PARM_DESC(fbcon_bpp, "fbcon bits-per-pixel (default: auto)");
74 static int nouveau_fbcon_bpp;
75 module_param_named(fbcon_bpp, nouveau_fbcon_bpp, int, 0400);
76
77 #ifndef __NetBSD__ /* XXX nouveau fbaccel */
78 static void
nouveau_fbcon_fillrect(struct fb_info * info,const struct fb_fillrect * rect)79 nouveau_fbcon_fillrect(struct fb_info *info, const struct fb_fillrect *rect)
80 {
81 struct nouveau_fbdev *fbcon = info->par;
82 struct nouveau_drm *drm = nouveau_drm(fbcon->helper.dev);
83 struct nvif_device *device = &drm->client.device;
84 int ret;
85
86 if (info->state != FBINFO_STATE_RUNNING)
87 return;
88
89 ret = -ENODEV;
90 if (!in_interrupt() && !(info->flags & FBINFO_HWACCEL_DISABLED) &&
91 mutex_trylock(&drm->client.mutex)) {
92 if (device->info.family < NV_DEVICE_INFO_V0_TESLA)
93 ret = nv04_fbcon_fillrect(info, rect);
94 else
95 if (device->info.family < NV_DEVICE_INFO_V0_FERMI)
96 ret = nv50_fbcon_fillrect(info, rect);
97 else
98 ret = nvc0_fbcon_fillrect(info, rect);
99 mutex_unlock(&drm->client.mutex);
100 }
101
102 if (ret == 0)
103 return;
104
105 if (ret != -ENODEV)
106 nouveau_fbcon_gpu_lockup(info);
107 drm_fb_helper_cfb_fillrect(info, rect);
108 }
109
110 static void
nouveau_fbcon_copyarea(struct fb_info * info,const struct fb_copyarea * image)111 nouveau_fbcon_copyarea(struct fb_info *info, const struct fb_copyarea *image)
112 {
113 struct nouveau_fbdev *fbcon = info->par;
114 struct nouveau_drm *drm = nouveau_drm(fbcon->helper.dev);
115 struct nvif_device *device = &drm->client.device;
116 int ret;
117
118 if (info->state != FBINFO_STATE_RUNNING)
119 return;
120
121 ret = -ENODEV;
122 if (!in_interrupt() && !(info->flags & FBINFO_HWACCEL_DISABLED) &&
123 mutex_trylock(&drm->client.mutex)) {
124 if (device->info.family < NV_DEVICE_INFO_V0_TESLA)
125 ret = nv04_fbcon_copyarea(info, image);
126 else
127 if (device->info.family < NV_DEVICE_INFO_V0_FERMI)
128 ret = nv50_fbcon_copyarea(info, image);
129 else
130 ret = nvc0_fbcon_copyarea(info, image);
131 mutex_unlock(&drm->client.mutex);
132 }
133
134 if (ret == 0)
135 return;
136
137 if (ret != -ENODEV)
138 nouveau_fbcon_gpu_lockup(info);
139 drm_fb_helper_cfb_copyarea(info, image);
140 }
141
142 static void
nouveau_fbcon_imageblit(struct fb_info * info,const struct fb_image * image)143 nouveau_fbcon_imageblit(struct fb_info *info, const struct fb_image *image)
144 {
145 struct nouveau_fbdev *fbcon = info->par;
146 struct nouveau_drm *drm = nouveau_drm(fbcon->helper.dev);
147 struct nvif_device *device = &drm->client.device;
148 int ret;
149
150 if (info->state != FBINFO_STATE_RUNNING)
151 return;
152
153 ret = -ENODEV;
154 if (!in_interrupt() && !(info->flags & FBINFO_HWACCEL_DISABLED) &&
155 mutex_trylock(&drm->client.mutex)) {
156 if (device->info.family < NV_DEVICE_INFO_V0_TESLA)
157 ret = nv04_fbcon_imageblit(info, image);
158 else
159 if (device->info.family < NV_DEVICE_INFO_V0_FERMI)
160 ret = nv50_fbcon_imageblit(info, image);
161 else
162 ret = nvc0_fbcon_imageblit(info, image);
163 mutex_unlock(&drm->client.mutex);
164 }
165
166 if (ret == 0)
167 return;
168
169 if (ret != -ENODEV)
170 nouveau_fbcon_gpu_lockup(info);
171 drm_fb_helper_cfb_imageblit(info, image);
172 }
173
174 static int
nouveau_fbcon_sync(struct fb_info * info)175 nouveau_fbcon_sync(struct fb_info *info)
176 {
177 struct nouveau_fbdev *fbcon = info->par;
178 struct nouveau_drm *drm = nouveau_drm(fbcon->helper.dev);
179 struct nouveau_channel *chan = drm->channel;
180 int ret;
181
182 if (!chan || !chan->accel_done || in_interrupt() ||
183 info->state != FBINFO_STATE_RUNNING ||
184 info->flags & FBINFO_HWACCEL_DISABLED)
185 return 0;
186
187 if (!mutex_trylock(&drm->client.mutex))
188 return 0;
189
190 ret = nouveau_channel_idle(chan);
191 mutex_unlock(&drm->client.mutex);
192 if (ret) {
193 nouveau_fbcon_gpu_lockup(info);
194 return 0;
195 }
196
197 chan->accel_done = false;
198 return 0;
199 }
200
201 static int
nouveau_fbcon_open(struct fb_info * info,int user)202 nouveau_fbcon_open(struct fb_info *info, int user)
203 {
204 struct nouveau_fbdev *fbcon = info->par;
205 struct nouveau_drm *drm = nouveau_drm(fbcon->helper.dev);
206 int ret = pm_runtime_get_sync(drm->dev->dev);
207 if (ret < 0 && ret != -EACCES)
208 return ret;
209 return 0;
210 }
211
212 static int
nouveau_fbcon_release(struct fb_info * info,int user)213 nouveau_fbcon_release(struct fb_info *info, int user)
214 {
215 struct nouveau_fbdev *fbcon = info->par;
216 struct nouveau_drm *drm = nouveau_drm(fbcon->helper.dev);
217 pm_runtime_put(drm->dev->dev);
218 return 0;
219 }
220
221 static const struct fb_ops nouveau_fbcon_ops = {
222 .owner = THIS_MODULE,
223 DRM_FB_HELPER_DEFAULT_OPS,
224 .fb_open = nouveau_fbcon_open,
225 .fb_release = nouveau_fbcon_release,
226 .fb_fillrect = nouveau_fbcon_fillrect,
227 .fb_copyarea = nouveau_fbcon_copyarea,
228 .fb_imageblit = nouveau_fbcon_imageblit,
229 .fb_sync = nouveau_fbcon_sync,
230 };
231
232 static const struct fb_ops nouveau_fbcon_sw_ops = {
233 .owner = THIS_MODULE,
234 DRM_FB_HELPER_DEFAULT_OPS,
235 .fb_open = nouveau_fbcon_open,
236 .fb_release = nouveau_fbcon_release,
237 .fb_fillrect = drm_fb_helper_cfb_fillrect,
238 .fb_copyarea = drm_fb_helper_cfb_copyarea,
239 .fb_imageblit = drm_fb_helper_cfb_imageblit,
240 };
241 #endif /* XXX nouveau fbaccel */
242
243 void
nouveau_fbcon_accel_save_disable(struct drm_device * dev)244 nouveau_fbcon_accel_save_disable(struct drm_device *dev)
245 {
246 #ifndef __NetBSD__ /* XXX nouveau fbaccel */
247 struct nouveau_drm *drm = nouveau_drm(dev);
248 if (drm->fbcon && drm->fbcon->helper.fbdev) {
249 drm->fbcon->saved_flags = drm->fbcon->helper.fbdev->flags;
250 drm->fbcon->helper.fbdev->flags |= FBINFO_HWACCEL_DISABLED;
251 }
252 #endif
253 }
254
255 void
nouveau_fbcon_accel_restore(struct drm_device * dev)256 nouveau_fbcon_accel_restore(struct drm_device *dev)
257 {
258 #ifndef __NetBSD__ /* XXX nouveau fbaccel */
259 struct nouveau_drm *drm = nouveau_drm(dev);
260 if (drm->fbcon && drm->fbcon->helper.fbdev) {
261 drm->fbcon->helper.fbdev->flags = drm->fbcon->saved_flags;
262 }
263 #endif
264 }
265
266 static void
nouveau_fbcon_accel_fini(struct drm_device * dev)267 nouveau_fbcon_accel_fini(struct drm_device *dev)
268 {
269 struct nouveau_drm *drm = nouveau_drm(dev);
270 struct nouveau_fbdev *fbcon = drm->fbcon;
271 if (fbcon && drm->channel) {
272 console_lock();
273 #ifndef __NetBSD__ /* XXX nouveau fbaccel */
274 if (fbcon->helper.fbdev)
275 fbcon->helper.fbdev->flags |= FBINFO_HWACCEL_DISABLED;
276 #endif
277 console_unlock();
278 nouveau_channel_idle(drm->channel);
279 nvif_object_fini(&fbcon->twod);
280 nvif_object_fini(&fbcon->blit);
281 nvif_object_fini(&fbcon->gdi);
282 nvif_object_fini(&fbcon->patt);
283 nvif_object_fini(&fbcon->rop);
284 nvif_object_fini(&fbcon->clip);
285 nvif_object_fini(&fbcon->surf2d);
286 }
287 }
288
289 #ifndef __NetBSD__ /* XXX nouveau fbaccel */
290 static void
nouveau_fbcon_accel_init(struct drm_device * dev)291 nouveau_fbcon_accel_init(struct drm_device *dev)
292 {
293 struct nouveau_drm *drm = nouveau_drm(dev);
294 struct nouveau_fbdev *fbcon = drm->fbcon;
295 struct fb_info *info = fbcon->helper.fbdev;
296 int ret;
297
298 if (drm->client.device.info.family < NV_DEVICE_INFO_V0_TESLA)
299 ret = nv04_fbcon_accel_init(info);
300 else
301 if (drm->client.device.info.family < NV_DEVICE_INFO_V0_FERMI)
302 ret = nv50_fbcon_accel_init(info);
303 else
304 ret = nvc0_fbcon_accel_init(info);
305
306 if (ret == 0)
307 info->fbops = &nouveau_fbcon_ops;
308 }
309 #endif
310
311 static void
nouveau_fbcon_zfill(struct drm_device * dev,struct nouveau_fbdev * fbcon)312 nouveau_fbcon_zfill(struct drm_device *dev, struct nouveau_fbdev *fbcon)
313 {
314 #ifdef __NetBSD__ /* XXX nouveau fbaccel */
315 struct drm_framebuffer *fb = fbcon->helper.fb;
316 struct nouveau_framebuffer *nvfb = container_of(fb,
317 struct nouveau_framebuffer, base);
318 struct nouveau_bo *nvbo = nvfb->nvbo;
319
320 (void)memset(__UNVOLATILE(nvbo_kmap_obj_iovirtual(nvbo)), 0,
321 nvbo->bo.num_pages << PAGE_SHIFT);
322 #else
323 struct fb_info *info = fbcon->helper.fbdev;
324 struct fb_fillrect rect;
325
326 /* Clear the entire fbcon. The drm will program every connector
327 * with it's preferred mode. If the sizes differ, one display will
328 * quite likely have garbage around the console.
329 */
330 rect.dx = rect.dy = 0;
331 rect.width = info->var.xres_virtual;
332 rect.height = info->var.yres_virtual;
333 rect.color = 0;
334 rect.rop = ROP_COPY;
335 info->fbops->fb_fillrect(info, &rect);
336 #endif
337 }
338
339 #ifdef __NetBSD__
340 static int
nouveau_fbcon_print(void * aux,const char * pnp)341 nouveau_fbcon_print(void *aux, const char *pnp)
342 {
343 if (pnp)
344 aprint_normal("nouveaufbbus at %s", pnp);
345
346 return (UNCONF);
347 }
348 #endif
349
350 static int
nouveau_fbcon_create(struct drm_fb_helper * helper,struct drm_fb_helper_surface_size * sizes)351 nouveau_fbcon_create(struct drm_fb_helper *helper,
352 struct drm_fb_helper_surface_size *sizes)
353 {
354 struct nouveau_fbdev *fbcon =
355 container_of(helper, struct nouveau_fbdev, helper);
356 struct drm_device *dev = fbcon->helper.dev;
357 struct nouveau_drm *drm = nouveau_drm(dev);
358 struct nvif_device *device = &drm->client.device;
359 #ifndef __NetBSD__
360 struct fb_info *info;
361 #endif
362 struct nouveau_framebuffer *fb;
363 struct nouveau_channel *chan;
364 struct nouveau_bo *nvbo;
365 struct drm_mode_fb_cmd2 mode_cmd;
366 int ret;
367
368 mode_cmd.width = sizes->surface_width;
369 mode_cmd.height = sizes->surface_height;
370
371 mode_cmd.pitches[0] = mode_cmd.width * (sizes->surface_bpp >> 3);
372 mode_cmd.pitches[0] = roundup(mode_cmd.pitches[0], 256);
373
374 mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp,
375 sizes->surface_depth);
376
377 ret = nouveau_gem_new(&drm->client, mode_cmd.pitches[0] *
378 mode_cmd.height, 0, NOUVEAU_GEM_DOMAIN_VRAM,
379 0, 0x0000, &nvbo);
380 if (ret) {
381 NV_ERROR(drm, "failed to allocate framebuffer\n");
382 goto out;
383 }
384
385 ret = nouveau_framebuffer_new(dev, &mode_cmd, nvbo, &fb);
386 if (ret)
387 goto out_unref;
388
389 ret = nouveau_bo_pin(nvbo, TTM_PL_FLAG_VRAM, false);
390 if (ret) {
391 NV_ERROR(drm, "failed to pin fb: %d\n", ret);
392 goto out_unref;
393 }
394
395 ret = nouveau_bo_map(nvbo);
396 if (ret) {
397 NV_ERROR(drm, "failed to map fb: %d\n", ret);
398 goto out_unpin;
399 }
400
401 chan = nouveau_nofbaccel ? NULL : drm->channel;
402 if (chan && device->info.family >= NV_DEVICE_INFO_V0_TESLA) {
403 ret = nouveau_vma_new(nvbo, chan->vmm, &fb->vma);
404 if (ret) {
405 NV_ERROR(drm, "failed to map fb into chan: %d\n", ret);
406 chan = NULL;
407 }
408 }
409
410 #ifdef __NetBSD__
411 fbcon->helper.fb = &fb->base;
412
413 nouveau_fbcon_zfill(dev, fbcon);
414
415 struct nouveaufb_attach_args nfa;
416
417 memset(&nfa, 0, sizeof(nfa));
418 nfa.nfa_fb_helper = &fbcon->helper;
419 nfa.nfa_fb_sizes = *sizes;
420 nfa.nfa_fb_ptr = nvbo_kmap_obj_iovirtual(nvbo);
421 nfa.nfa_fb_linebytes = mode_cmd.pitches[0];
422
423 KERNEL_LOCK(1, NULL);
424 helper->fbdev = config_found(dev->dev, &nfa, nouveau_fbcon_print,
425 CFARGS(.iattr = "nouveaufbbus"));
426 KERNEL_UNLOCK_ONE(NULL);
427 if (helper->fbdev == NULL) {
428 goto out_unlock;
429 }
430
431 return 0;
432 #else
433 info = drm_fb_helper_alloc_fbi(helper);
434 if (IS_ERR(info)) {
435 ret = PTR_ERR(info);
436 goto out_unlock;
437 }
438
439 /* setup helper */
440 fbcon->helper.fb = &fb->base;
441
442 if (!chan)
443 info->flags = FBINFO_HWACCEL_DISABLED;
444 else
445 info->flags = FBINFO_HWACCEL_COPYAREA |
446 FBINFO_HWACCEL_FILLRECT |
447 FBINFO_HWACCEL_IMAGEBLIT;
448 info->fbops = &nouveau_fbcon_sw_ops;
449 info->fix.smem_start = fb->nvbo->bo.mem.bus.base +
450 fb->nvbo->bo.mem.bus.offset;
451 info->fix.smem_len = fb->nvbo->bo.mem.num_pages << PAGE_SHIFT;
452
453 info->screen_base = nvbo_kmap_obj_iovirtual(fb->nvbo);
454 info->screen_size = fb->nvbo->bo.mem.num_pages << PAGE_SHIFT;
455
456 drm_fb_helper_fill_info(info, &fbcon->helper, sizes);
457
458 /* Use default scratch pixmap (info->pixmap.flags = FB_PIXMAP_SYSTEM) */
459
460 if (chan)
461 nouveau_fbcon_accel_init(dev);
462 nouveau_fbcon_zfill(dev, fbcon);
463
464 /* To allow resizeing without swapping buffers */
465 NV_INFO(drm, "allocated %dx%d fb: 0x%jx, bo %p\n",
466 nouveau_fb->base.width, nouveau_fb->base.height,
467 (uintmax_t)nvbo->bo.offset, nvbo);
468
469 vga_switcheroo_client_fb_set(dev->pdev, info);
470 return 0;
471 #endif /* defined(__NetBSD__) */
472
473 out_unlock:
474 if (chan)
475 nouveau_vma_del(&fb->vma);
476 nouveau_bo_unmap(fb->nvbo);
477 out_unpin:
478 nouveau_bo_unpin(fb->nvbo);
479 out_unref:
480 nouveau_bo_ref(NULL, &fb->nvbo);
481 out:
482 return ret;
483 }
484
485 static int
nouveau_fbcon_destroy(struct drm_device * dev,struct nouveau_fbdev * fbcon)486 nouveau_fbcon_destroy(struct drm_device *dev, struct nouveau_fbdev *fbcon)
487 {
488 struct nouveau_framebuffer *nouveau_fb = nouveau_framebuffer(fbcon->helper.fb);
489
490 drm_fb_helper_unregister_fbi(&fbcon->helper);
491 drm_fb_helper_fini(&fbcon->helper);
492
493 if (nouveau_fb && nouveau_fb->nvbo) {
494 nouveau_vma_del(&nouveau_fb->vma);
495 nouveau_bo_unmap(nouveau_fb->nvbo);
496 nouveau_bo_unpin(nouveau_fb->nvbo);
497 drm_framebuffer_put(&nouveau_fb->base);
498 }
499
500 return 0;
501 }
502
503 #ifndef __NetBSD__ /* XXX nouveau fbaccel */
nouveau_fbcon_gpu_lockup(struct fb_info * info)504 void nouveau_fbcon_gpu_lockup(struct fb_info *info)
505 {
506 struct nouveau_fbdev *fbcon = info->par;
507 struct nouveau_drm *drm = nouveau_drm(fbcon->helper.dev);
508
509 NV_ERROR(drm, "GPU lockup - switching to software fbcon\n");
510 info->flags |= FBINFO_HWACCEL_DISABLED;
511 }
512 #endif
513
514 static const struct drm_fb_helper_funcs nouveau_fbcon_helper_funcs = {
515 .fb_probe = nouveau_fbcon_create,
516 };
517
518 static void
nouveau_fbcon_set_suspend_work(struct work_struct * work)519 nouveau_fbcon_set_suspend_work(struct work_struct *work)
520 {
521 struct nouveau_drm *drm = container_of(work, typeof(*drm), fbcon_work);
522 int state = READ_ONCE(drm->fbcon_new_state);
523
524 if (state == FBINFO_STATE_RUNNING)
525 pm_runtime_get_sync(drm->dev->dev);
526
527 console_lock();
528 if (state == FBINFO_STATE_RUNNING)
529 nouveau_fbcon_accel_restore(drm->dev);
530 drm_fb_helper_set_suspend(&drm->fbcon->helper, state);
531 if (state != FBINFO_STATE_RUNNING)
532 nouveau_fbcon_accel_save_disable(drm->dev);
533 console_unlock();
534
535 if (state == FBINFO_STATE_RUNNING) {
536 nouveau_fbcon_hotplug_resume(drm->fbcon);
537 pm_runtime_mark_last_busy(drm->dev->dev);
538 pm_runtime_put_sync(drm->dev->dev);
539 }
540 }
541
542 void
nouveau_fbcon_set_suspend(struct drm_device * dev,int state)543 nouveau_fbcon_set_suspend(struct drm_device *dev, int state)
544 {
545 struct nouveau_drm *drm = nouveau_drm(dev);
546
547 if (!drm->fbcon)
548 return;
549
550 drm->fbcon_new_state = state;
551 /* Since runtime resume can happen as a result of a sysfs operation,
552 * it's possible we already have the console locked. So handle fbcon
553 * init/deinit from a seperate work thread
554 */
555 schedule_work(&drm->fbcon_work);
556 }
557
558 void
nouveau_fbcon_output_poll_changed(struct drm_device * dev)559 nouveau_fbcon_output_poll_changed(struct drm_device *dev)
560 {
561 struct nouveau_drm *drm = nouveau_drm(dev);
562 struct nouveau_fbdev *fbcon = drm->fbcon;
563 int ret;
564
565 if (!fbcon)
566 return;
567
568 mutex_lock(&fbcon->hotplug_lock);
569
570 ret = pm_runtime_get(dev->dev);
571 if (ret == 1 || ret == -EACCES) {
572 drm_fb_helper_hotplug_event(&fbcon->helper);
573
574 pm_runtime_mark_last_busy(dev->dev);
575 pm_runtime_put_autosuspend(dev->dev);
576 } else if (ret == 0) {
577 /* If the GPU was already in the process of suspending before
578 * this event happened, then we can't block here as we'll
579 * deadlock the runtime pmops since they wait for us to
580 * finish. So, just defer this event for when we runtime
581 * resume again. It will be handled by fbcon_work.
582 */
583 NV_DEBUG(drm, "fbcon HPD event deferred until runtime resume\n");
584 fbcon->hotplug_waiting = true;
585 pm_runtime_put_noidle(drm->dev->dev);
586 } else {
587 DRM_WARN("fbcon HPD event lost due to RPM failure: %d\n",
588 ret);
589 }
590
591 mutex_unlock(&fbcon->hotplug_lock);
592 }
593
594 void
nouveau_fbcon_hotplug_resume(struct nouveau_fbdev * fbcon)595 nouveau_fbcon_hotplug_resume(struct nouveau_fbdev *fbcon)
596 {
597 struct nouveau_drm *drm;
598
599 if (!fbcon)
600 return;
601 drm = nouveau_drm(fbcon->helper.dev);
602
603 mutex_lock(&fbcon->hotplug_lock);
604 if (fbcon->hotplug_waiting) {
605 fbcon->hotplug_waiting = false;
606
607 NV_DEBUG(drm, "Handling deferred fbcon HPD events\n");
608 drm_fb_helper_hotplug_event(&fbcon->helper);
609 }
610 mutex_unlock(&fbcon->hotplug_lock);
611 }
612
613 int
nouveau_fbcon_init(struct drm_device * dev)614 nouveau_fbcon_init(struct drm_device *dev)
615 {
616 struct nouveau_drm *drm = nouveau_drm(dev);
617 struct nouveau_fbdev *fbcon;
618 int preferred_bpp = nouveau_fbcon_bpp;
619 int ret;
620
621 if (!dev->mode_config.num_crtc ||
622 (dev->pdev->class >> 8) != PCI_CLASS_DISPLAY_VGA)
623 return 0;
624
625 fbcon = kzalloc(sizeof(struct nouveau_fbdev), GFP_KERNEL);
626 if (!fbcon)
627 return -ENOMEM;
628
629 drm->fbcon = fbcon;
630 INIT_WORK(&drm->fbcon_work, nouveau_fbcon_set_suspend_work);
631 mutex_init(&fbcon->hotplug_lock);
632
633 drm_fb_helper_prepare(dev, &fbcon->helper, &nouveau_fbcon_helper_funcs);
634
635 ret = drm_fb_helper_init(dev, &fbcon->helper, 4);
636 if (ret)
637 goto free;
638
639 ret = drm_fb_helper_single_add_all_connectors(&fbcon->helper);
640 if (ret)
641 goto fini;
642
643 if (preferred_bpp != 8 && preferred_bpp != 16 && preferred_bpp != 32) {
644 if (drm->client.device.info.ram_size <= 32 * 1024 * 1024)
645 preferred_bpp = 8;
646 else
647 if (drm->client.device.info.ram_size <= 64 * 1024 * 1024)
648 preferred_bpp = 16;
649 else
650 preferred_bpp = 32;
651 }
652
653 /* disable all the possible outputs/crtcs before entering KMS mode */
654 if (!drm_drv_uses_atomic_modeset(dev))
655 drm_helper_disable_unused_functions(dev);
656
657 ret = drm_fb_helper_initial_config(&fbcon->helper, preferred_bpp);
658 if (ret)
659 goto fini;
660
661 #ifndef __NetBSD__
662 if (fbcon->helper.fbdev)
663 fbcon->helper.fbdev->pixmap.buf_align = 4;
664 #endif
665 return 0;
666
667 fini:
668 drm_fb_helper_fini(&fbcon->helper);
669 free:
670 kfree(fbcon);
671 return ret;
672 }
673
674 void
nouveau_fbcon_fini(struct drm_device * dev)675 nouveau_fbcon_fini(struct drm_device *dev)
676 {
677 struct nouveau_drm *drm = nouveau_drm(dev);
678
679 if (!drm->fbcon)
680 return;
681
682 nouveau_fbcon_accel_fini(dev);
683 nouveau_fbcon_destroy(dev, drm->fbcon);
684 mutex_destroy(&drm->fbcon->hotplug_lock);
685 kfree(drm->fbcon);
686 drm->fbcon = NULL;
687 }
688