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/init.h>
36 #include <linux/screen_info.h>
37 #include <linux/vga_switcheroo.h>
38 #include <linux/console.h>
39
40 #include <drm/drmP.h>
41 #include <drm/drm_crtc.h>
42 #include <drm/drm_crtc_helper.h>
43 #include <drm/drm_fb_helper.h>
44 #include <drm/drm_atomic.h>
45
46 #include "nouveau_drv.h"
47 #include "nouveau_gem.h"
48 #include "nouveau_bo.h"
49 #include "nouveau_fbcon.h"
50 #include "nouveau_chan.h"
51 #include "nouveau_vmm.h"
52
53 #include "nouveau_crtc.h"
54
55 MODULE_PARM_DESC(nofbaccel, "Disable fbcon acceleration");
56 int nouveau_nofbaccel = 0;
57 module_param_named(nofbaccel, nouveau_nofbaccel, int, 0400);
58
59 MODULE_PARM_DESC(fbcon_bpp, "fbcon bits-per-pixel (default: auto)");
60 static int nouveau_fbcon_bpp;
61 module_param_named(fbcon_bpp, nouveau_fbcon_bpp, int, 0400);
62
63 static void
nouveau_fbcon_fillrect(struct fb_info * info,const struct fb_fillrect * rect)64 nouveau_fbcon_fillrect(struct fb_info *info, const struct fb_fillrect *rect)
65 {
66 struct nouveau_fbdev *fbcon = info->par;
67 struct nouveau_drm *drm = nouveau_drm(fbcon->helper.dev);
68 struct nvif_device *device = &drm->client.device;
69 int ret;
70
71 if (info->state != FBINFO_STATE_RUNNING)
72 return;
73
74 ret = -ENODEV;
75 if (!in_interrupt() && !(info->flags & FBINFO_HWACCEL_DISABLED) &&
76 mutex_trylock(&drm->client.mutex)) {
77 if (device->info.family < NV_DEVICE_INFO_V0_TESLA)
78 ret = nv04_fbcon_fillrect(info, rect);
79 else
80 if (device->info.family < NV_DEVICE_INFO_V0_FERMI)
81 ret = nv50_fbcon_fillrect(info, rect);
82 else
83 ret = nvc0_fbcon_fillrect(info, rect);
84 mutex_unlock(&drm->client.mutex);
85 }
86
87 if (ret == 0)
88 return;
89
90 if (ret != -ENODEV)
91 nouveau_fbcon_gpu_lockup(info);
92 drm_fb_helper_cfb_fillrect(info, rect);
93 }
94
95 static void
nouveau_fbcon_copyarea(struct fb_info * info,const struct fb_copyarea * image)96 nouveau_fbcon_copyarea(struct fb_info *info, const struct fb_copyarea *image)
97 {
98 struct nouveau_fbdev *fbcon = info->par;
99 struct nouveau_drm *drm = nouveau_drm(fbcon->helper.dev);
100 struct nvif_device *device = &drm->client.device;
101 int ret;
102
103 if (info->state != FBINFO_STATE_RUNNING)
104 return;
105
106 ret = -ENODEV;
107 if (!in_interrupt() && !(info->flags & FBINFO_HWACCEL_DISABLED) &&
108 mutex_trylock(&drm->client.mutex)) {
109 if (device->info.family < NV_DEVICE_INFO_V0_TESLA)
110 ret = nv04_fbcon_copyarea(info, image);
111 else
112 if (device->info.family < NV_DEVICE_INFO_V0_FERMI)
113 ret = nv50_fbcon_copyarea(info, image);
114 else
115 ret = nvc0_fbcon_copyarea(info, image);
116 mutex_unlock(&drm->client.mutex);
117 }
118
119 if (ret == 0)
120 return;
121
122 if (ret != -ENODEV)
123 nouveau_fbcon_gpu_lockup(info);
124 drm_fb_helper_cfb_copyarea(info, image);
125 }
126
127 static void
nouveau_fbcon_imageblit(struct fb_info * info,const struct fb_image * image)128 nouveau_fbcon_imageblit(struct fb_info *info, const struct fb_image *image)
129 {
130 struct nouveau_fbdev *fbcon = info->par;
131 struct nouveau_drm *drm = nouveau_drm(fbcon->helper.dev);
132 struct nvif_device *device = &drm->client.device;
133 int ret;
134
135 if (info->state != FBINFO_STATE_RUNNING)
136 return;
137
138 ret = -ENODEV;
139 if (!in_interrupt() && !(info->flags & FBINFO_HWACCEL_DISABLED) &&
140 mutex_trylock(&drm->client.mutex)) {
141 if (device->info.family < NV_DEVICE_INFO_V0_TESLA)
142 ret = nv04_fbcon_imageblit(info, image);
143 else
144 if (device->info.family < NV_DEVICE_INFO_V0_FERMI)
145 ret = nv50_fbcon_imageblit(info, image);
146 else
147 ret = nvc0_fbcon_imageblit(info, image);
148 mutex_unlock(&drm->client.mutex);
149 }
150
151 if (ret == 0)
152 return;
153
154 if (ret != -ENODEV)
155 nouveau_fbcon_gpu_lockup(info);
156 drm_fb_helper_cfb_imageblit(info, image);
157 }
158
159 static int
nouveau_fbcon_sync(struct fb_info * info)160 nouveau_fbcon_sync(struct fb_info *info)
161 {
162 struct nouveau_fbdev *fbcon = info->par;
163 struct nouveau_drm *drm = nouveau_drm(fbcon->helper.dev);
164 struct nouveau_channel *chan = drm->channel;
165 int ret;
166
167 if (!chan || !chan->accel_done || in_interrupt() ||
168 info->state != FBINFO_STATE_RUNNING ||
169 info->flags & FBINFO_HWACCEL_DISABLED)
170 return 0;
171
172 if (!mutex_trylock(&drm->client.mutex))
173 return 0;
174
175 ret = nouveau_channel_idle(chan);
176 mutex_unlock(&drm->client.mutex);
177 if (ret) {
178 nouveau_fbcon_gpu_lockup(info);
179 return 0;
180 }
181
182 chan->accel_done = false;
183 return 0;
184 }
185
186 static int
nouveau_fbcon_open(struct fb_info * info,int user)187 nouveau_fbcon_open(struct fb_info *info, int user)
188 {
189 struct nouveau_fbdev *fbcon = info->par;
190 struct nouveau_drm *drm = nouveau_drm(fbcon->helper.dev);
191 int ret = pm_runtime_get_sync(drm->dev->dev);
192 if (ret < 0 && ret != -EACCES)
193 return ret;
194 return 0;
195 }
196
197 static int
nouveau_fbcon_release(struct fb_info * info,int user)198 nouveau_fbcon_release(struct fb_info *info, int user)
199 {
200 struct nouveau_fbdev *fbcon = info->par;
201 struct nouveau_drm *drm = nouveau_drm(fbcon->helper.dev);
202 pm_runtime_put(drm->dev->dev);
203 return 0;
204 }
205
206 static struct fb_ops nouveau_fbcon_ops = {
207 .owner = THIS_MODULE,
208 DRM_FB_HELPER_DEFAULT_OPS,
209 .fb_open = nouveau_fbcon_open,
210 .fb_release = nouveau_fbcon_release,
211 .fb_fillrect = nouveau_fbcon_fillrect,
212 .fb_copyarea = nouveau_fbcon_copyarea,
213 .fb_imageblit = nouveau_fbcon_imageblit,
214 .fb_sync = nouveau_fbcon_sync,
215 };
216
217 static struct fb_ops nouveau_fbcon_sw_ops = {
218 .owner = THIS_MODULE,
219 DRM_FB_HELPER_DEFAULT_OPS,
220 .fb_open = nouveau_fbcon_open,
221 .fb_release = nouveau_fbcon_release,
222 .fb_fillrect = drm_fb_helper_cfb_fillrect,
223 .fb_copyarea = drm_fb_helper_cfb_copyarea,
224 .fb_imageblit = drm_fb_helper_cfb_imageblit,
225 };
226
227 void
nouveau_fbcon_accel_save_disable(struct drm_device * dev)228 nouveau_fbcon_accel_save_disable(struct drm_device *dev)
229 {
230 struct nouveau_drm *drm = nouveau_drm(dev);
231 if (drm->fbcon && drm->fbcon->helper.fbdev) {
232 drm->fbcon->saved_flags = drm->fbcon->helper.fbdev->flags;
233 drm->fbcon->helper.fbdev->flags |= FBINFO_HWACCEL_DISABLED;
234 }
235 }
236
237 void
nouveau_fbcon_accel_restore(struct drm_device * dev)238 nouveau_fbcon_accel_restore(struct drm_device *dev)
239 {
240 struct nouveau_drm *drm = nouveau_drm(dev);
241 if (drm->fbcon && drm->fbcon->helper.fbdev) {
242 drm->fbcon->helper.fbdev->flags = drm->fbcon->saved_flags;
243 }
244 }
245
246 static void
nouveau_fbcon_accel_fini(struct drm_device * dev)247 nouveau_fbcon_accel_fini(struct drm_device *dev)
248 {
249 struct nouveau_drm *drm = nouveau_drm(dev);
250 struct nouveau_fbdev *fbcon = drm->fbcon;
251 if (fbcon && drm->channel) {
252 console_lock();
253 if (fbcon->helper.fbdev)
254 fbcon->helper.fbdev->flags |= FBINFO_HWACCEL_DISABLED;
255 console_unlock();
256 nouveau_channel_idle(drm->channel);
257 nvif_object_fini(&fbcon->twod);
258 nvif_object_fini(&fbcon->blit);
259 nvif_object_fini(&fbcon->gdi);
260 nvif_object_fini(&fbcon->patt);
261 nvif_object_fini(&fbcon->rop);
262 nvif_object_fini(&fbcon->clip);
263 nvif_object_fini(&fbcon->surf2d);
264 }
265 }
266
267 static void
nouveau_fbcon_accel_init(struct drm_device * dev)268 nouveau_fbcon_accel_init(struct drm_device *dev)
269 {
270 struct nouveau_drm *drm = nouveau_drm(dev);
271 struct nouveau_fbdev *fbcon = drm->fbcon;
272 struct fb_info *info = fbcon->helper.fbdev;
273 int ret;
274
275 if (drm->client.device.info.family < NV_DEVICE_INFO_V0_TESLA)
276 ret = nv04_fbcon_accel_init(info);
277 else
278 if (drm->client.device.info.family < NV_DEVICE_INFO_V0_FERMI)
279 ret = nv50_fbcon_accel_init(info);
280 else
281 ret = nvc0_fbcon_accel_init(info);
282
283 if (ret == 0)
284 info->fbops = &nouveau_fbcon_ops;
285 }
286
287 static void
nouveau_fbcon_zfill(struct drm_device * dev,struct nouveau_fbdev * fbcon)288 nouveau_fbcon_zfill(struct drm_device *dev, struct nouveau_fbdev *fbcon)
289 {
290 struct fb_info *info = fbcon->helper.fbdev;
291 struct fb_fillrect rect;
292
293 /* Clear the entire fbcon. The drm will program every connector
294 * with it's preferred mode. If the sizes differ, one display will
295 * quite likely have garbage around the console.
296 */
297 rect.dx = rect.dy = 0;
298 rect.width = info->var.xres_virtual;
299 rect.height = info->var.yres_virtual;
300 rect.color = 0;
301 rect.rop = ROP_COPY;
302 info->fbops->fb_fillrect(info, &rect);
303 }
304
305 static int
nouveau_fbcon_create(struct drm_fb_helper * helper,struct drm_fb_helper_surface_size * sizes)306 nouveau_fbcon_create(struct drm_fb_helper *helper,
307 struct drm_fb_helper_surface_size *sizes)
308 {
309 struct nouveau_fbdev *fbcon =
310 container_of(helper, struct nouveau_fbdev, helper);
311 struct drm_device *dev = fbcon->helper.dev;
312 struct nouveau_drm *drm = nouveau_drm(dev);
313 struct nvif_device *device = &drm->client.device;
314 struct fb_info *info;
315 struct nouveau_framebuffer *fb;
316 struct nouveau_channel *chan;
317 struct nouveau_bo *nvbo;
318 struct drm_mode_fb_cmd2 mode_cmd;
319 int ret;
320
321 mode_cmd.width = sizes->surface_width;
322 mode_cmd.height = sizes->surface_height;
323
324 mode_cmd.pitches[0] = mode_cmd.width * (sizes->surface_bpp >> 3);
325 mode_cmd.pitches[0] = roundup(mode_cmd.pitches[0], 256);
326
327 mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp,
328 sizes->surface_depth);
329
330 ret = nouveau_gem_new(&drm->client, mode_cmd.pitches[0] *
331 mode_cmd.height, 0, NOUVEAU_GEM_DOMAIN_VRAM,
332 0, 0x0000, &nvbo);
333 if (ret) {
334 NV_ERROR(drm, "failed to allocate framebuffer\n");
335 goto out;
336 }
337
338 ret = nouveau_framebuffer_new(dev, &mode_cmd, nvbo, &fb);
339 if (ret)
340 goto out_unref;
341
342 ret = nouveau_bo_pin(nvbo, TTM_PL_FLAG_VRAM, false);
343 if (ret) {
344 NV_ERROR(drm, "failed to pin fb: %d\n", ret);
345 goto out_unref;
346 }
347
348 ret = nouveau_bo_map(nvbo);
349 if (ret) {
350 NV_ERROR(drm, "failed to map fb: %d\n", ret);
351 goto out_unpin;
352 }
353
354 chan = nouveau_nofbaccel ? NULL : drm->channel;
355 if (chan && device->info.family >= NV_DEVICE_INFO_V0_TESLA) {
356 ret = nouveau_vma_new(nvbo, &drm->client.vmm, &fb->vma);
357 if (ret) {
358 NV_ERROR(drm, "failed to map fb into chan: %d\n", ret);
359 chan = NULL;
360 }
361 }
362
363 info = drm_fb_helper_alloc_fbi(helper);
364 if (IS_ERR(info)) {
365 ret = PTR_ERR(info);
366 goto out_unlock;
367 }
368 info->skip_vt_switch = 1;
369
370 info->par = fbcon;
371
372 /* setup helper */
373 fbcon->helper.fb = &fb->base;
374
375 strcpy(info->fix.id, "nouveaufb");
376 if (!chan)
377 info->flags = FBINFO_DEFAULT | FBINFO_HWACCEL_DISABLED;
378 else
379 info->flags = FBINFO_DEFAULT | FBINFO_HWACCEL_COPYAREA |
380 FBINFO_HWACCEL_FILLRECT |
381 FBINFO_HWACCEL_IMAGEBLIT;
382 info->flags |= FBINFO_CAN_FORCE_OUTPUT;
383 info->fbops = &nouveau_fbcon_sw_ops;
384 info->fix.smem_start = fb->nvbo->bo.mem.bus.base +
385 fb->nvbo->bo.mem.bus.offset;
386 info->fix.smem_len = fb->nvbo->bo.mem.num_pages << PAGE_SHIFT;
387
388 info->screen_base = nvbo_kmap_obj_iovirtual(fb->nvbo);
389 info->screen_size = fb->nvbo->bo.mem.num_pages << PAGE_SHIFT;
390
391 drm_fb_helper_fill_fix(info, fb->base.pitches[0],
392 fb->base.format->depth);
393 drm_fb_helper_fill_var(info, &fbcon->helper, sizes->fb_width, sizes->fb_height);
394
395 /* Use default scratch pixmap (info->pixmap.flags = FB_PIXMAP_SYSTEM) */
396
397 if (chan)
398 nouveau_fbcon_accel_init(dev);
399 nouveau_fbcon_zfill(dev, fbcon);
400
401 /* To allow resizeing without swapping buffers */
402 NV_INFO(drm, "allocated %dx%d fb: 0x%llx, bo %p\n",
403 fb->base.width, fb->base.height, fb->nvbo->bo.offset, nvbo);
404
405 vga_switcheroo_client_fb_set(dev->pdev, info);
406 return 0;
407
408 out_unlock:
409 if (chan)
410 nouveau_vma_del(&fb->vma);
411 nouveau_bo_unmap(fb->nvbo);
412 out_unpin:
413 nouveau_bo_unpin(fb->nvbo);
414 out_unref:
415 nouveau_bo_ref(NULL, &fb->nvbo);
416 out:
417 return ret;
418 }
419
420 static int
nouveau_fbcon_destroy(struct drm_device * dev,struct nouveau_fbdev * fbcon)421 nouveau_fbcon_destroy(struct drm_device *dev, struct nouveau_fbdev *fbcon)
422 {
423 struct nouveau_framebuffer *nouveau_fb = nouveau_framebuffer(fbcon->helper.fb);
424
425 drm_fb_helper_unregister_fbi(&fbcon->helper);
426 drm_fb_helper_fini(&fbcon->helper);
427
428 if (nouveau_fb && nouveau_fb->nvbo) {
429 nouveau_vma_del(&nouveau_fb->vma);
430 nouveau_bo_unmap(nouveau_fb->nvbo);
431 nouveau_bo_unpin(nouveau_fb->nvbo);
432 drm_framebuffer_put(&nouveau_fb->base);
433 }
434
435 return 0;
436 }
437
nouveau_fbcon_gpu_lockup(struct fb_info * info)438 void nouveau_fbcon_gpu_lockup(struct fb_info *info)
439 {
440 struct nouveau_fbdev *fbcon = info->par;
441 struct nouveau_drm *drm = nouveau_drm(fbcon->helper.dev);
442
443 NV_ERROR(drm, "GPU lockup - switching to software fbcon\n");
444 info->flags |= FBINFO_HWACCEL_DISABLED;
445 }
446
447 static const struct drm_fb_helper_funcs nouveau_fbcon_helper_funcs = {
448 .fb_probe = nouveau_fbcon_create,
449 };
450
451 static void
nouveau_fbcon_set_suspend_work(struct work_struct * work)452 nouveau_fbcon_set_suspend_work(struct work_struct *work)
453 {
454 struct nouveau_drm *drm = container_of(work, typeof(*drm), fbcon_work);
455 int state = READ_ONCE(drm->fbcon_new_state);
456
457 if (state == FBINFO_STATE_RUNNING)
458 pm_runtime_get_sync(drm->dev->dev);
459
460 console_lock();
461 if (state == FBINFO_STATE_RUNNING)
462 nouveau_fbcon_accel_restore(drm->dev);
463 drm_fb_helper_set_suspend(&drm->fbcon->helper, state);
464 if (state != FBINFO_STATE_RUNNING)
465 nouveau_fbcon_accel_save_disable(drm->dev);
466 console_unlock();
467
468 if (state == FBINFO_STATE_RUNNING) {
469 nouveau_fbcon_hotplug_resume(drm->fbcon);
470 pm_runtime_mark_last_busy(drm->dev->dev);
471 pm_runtime_put_sync(drm->dev->dev);
472 }
473 }
474
475 void
nouveau_fbcon_set_suspend(struct drm_device * dev,int state)476 nouveau_fbcon_set_suspend(struct drm_device *dev, int state)
477 {
478 struct nouveau_drm *drm = nouveau_drm(dev);
479
480 if (!drm->fbcon)
481 return;
482
483 drm->fbcon_new_state = state;
484 /* Since runtime resume can happen as a result of a sysfs operation,
485 * it's possible we already have the console locked. So handle fbcon
486 * init/deinit from a seperate work thread
487 */
488 schedule_work(&drm->fbcon_work);
489 }
490
491 void
nouveau_fbcon_output_poll_changed(struct drm_device * dev)492 nouveau_fbcon_output_poll_changed(struct drm_device *dev)
493 {
494 struct nouveau_drm *drm = nouveau_drm(dev);
495 struct nouveau_fbdev *fbcon = drm->fbcon;
496 int ret;
497
498 if (!fbcon)
499 return;
500
501 mutex_lock(&fbcon->hotplug_lock);
502
503 ret = pm_runtime_get(dev->dev);
504 if (ret == 1 || ret == -EACCES) {
505 drm_fb_helper_hotplug_event(&fbcon->helper);
506
507 pm_runtime_mark_last_busy(dev->dev);
508 pm_runtime_put_autosuspend(dev->dev);
509 } else if (ret == 0) {
510 /* If the GPU was already in the process of suspending before
511 * this event happened, then we can't block here as we'll
512 * deadlock the runtime pmops since they wait for us to
513 * finish. So, just defer this event for when we runtime
514 * resume again. It will be handled by fbcon_work.
515 */
516 NV_DEBUG(drm, "fbcon HPD event deferred until runtime resume\n");
517 fbcon->hotplug_waiting = true;
518 pm_runtime_put_noidle(drm->dev->dev);
519 } else {
520 DRM_WARN("fbcon HPD event lost due to RPM failure: %d\n",
521 ret);
522 }
523
524 mutex_unlock(&fbcon->hotplug_lock);
525 }
526
527 void
nouveau_fbcon_hotplug_resume(struct nouveau_fbdev * fbcon)528 nouveau_fbcon_hotplug_resume(struct nouveau_fbdev *fbcon)
529 {
530 struct nouveau_drm *drm;
531
532 if (!fbcon)
533 return;
534 drm = nouveau_drm(fbcon->helper.dev);
535
536 mutex_lock(&fbcon->hotplug_lock);
537 if (fbcon->hotplug_waiting) {
538 fbcon->hotplug_waiting = false;
539
540 NV_DEBUG(drm, "Handling deferred fbcon HPD events\n");
541 drm_fb_helper_hotplug_event(&fbcon->helper);
542 }
543 mutex_unlock(&fbcon->hotplug_lock);
544 }
545
546 int
nouveau_fbcon_init(struct drm_device * dev)547 nouveau_fbcon_init(struct drm_device *dev)
548 {
549 struct nouveau_drm *drm = nouveau_drm(dev);
550 struct nouveau_fbdev *fbcon;
551 int preferred_bpp = nouveau_fbcon_bpp;
552 int ret;
553
554 if (!dev->mode_config.num_crtc ||
555 (dev->pdev->class >> 8) != PCI_CLASS_DISPLAY_VGA)
556 return 0;
557
558 fbcon = kzalloc(sizeof(struct nouveau_fbdev), GFP_KERNEL);
559 if (!fbcon)
560 return -ENOMEM;
561
562 drm->fbcon = fbcon;
563 INIT_WORK(&drm->fbcon_work, nouveau_fbcon_set_suspend_work);
564 mutex_init(&fbcon->hotplug_lock);
565
566 drm_fb_helper_prepare(dev, &fbcon->helper, &nouveau_fbcon_helper_funcs);
567
568 ret = drm_fb_helper_init(dev, &fbcon->helper, 4);
569 if (ret)
570 goto free;
571
572 ret = drm_fb_helper_single_add_all_connectors(&fbcon->helper);
573 if (ret)
574 goto fini;
575
576 if (preferred_bpp != 8 && preferred_bpp != 16 && preferred_bpp != 32) {
577 if (drm->client.device.info.ram_size <= 32 * 1024 * 1024)
578 preferred_bpp = 8;
579 else
580 if (drm->client.device.info.ram_size <= 64 * 1024 * 1024)
581 preferred_bpp = 16;
582 else
583 preferred_bpp = 32;
584 }
585
586 /* disable all the possible outputs/crtcs before entering KMS mode */
587 if (!drm_drv_uses_atomic_modeset(dev))
588 drm_helper_disable_unused_functions(dev);
589
590 ret = drm_fb_helper_initial_config(&fbcon->helper, preferred_bpp);
591 if (ret)
592 goto fini;
593
594 if (fbcon->helper.fbdev)
595 fbcon->helper.fbdev->pixmap.buf_align = 4;
596 return 0;
597
598 fini:
599 drm_fb_helper_fini(&fbcon->helper);
600 free:
601 kfree(fbcon);
602 return ret;
603 }
604
605 void
nouveau_fbcon_fini(struct drm_device * dev)606 nouveau_fbcon_fini(struct drm_device *dev)
607 {
608 struct nouveau_drm *drm = nouveau_drm(dev);
609
610 if (!drm->fbcon)
611 return;
612
613 nouveau_fbcon_accel_fini(dev);
614 nouveau_fbcon_destroy(dev, drm->fbcon);
615 kfree(drm->fbcon);
616 drm->fbcon = NULL;
617 }
618
