Version:  2.0.40 2.2.26 2.4.37 2.6.39 3.0 3.1 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9 3.10 3.11 3.12 3.13 3.14 3.15

Linux/drivers/gpu/drm/tegra/drm.c

  1 /*
  2  * Copyright (C) 2012 Avionic Design GmbH
  3  * Copyright (C) 2012-2013 NVIDIA CORPORATION.  All rights reserved.
  4  *
  5  * This program is free software; you can redistribute it and/or modify
  6  * it under the terms of the GNU General Public License version 2 as
  7  * published by the Free Software Foundation.
  8  */
  9 
 10 #include <linux/host1x.h>
 11 
 12 #include "drm.h"
 13 #include "gem.h"
 14 
 15 #define DRIVER_NAME "tegra"
 16 #define DRIVER_DESC "NVIDIA Tegra graphics"
 17 #define DRIVER_DATE "20120330"
 18 #define DRIVER_MAJOR 0
 19 #define DRIVER_MINOR 0
 20 #define DRIVER_PATCHLEVEL 0
 21 
 22 struct tegra_drm_file {
 23         struct list_head contexts;
 24 };
 25 
 26 static int tegra_drm_load(struct drm_device *drm, unsigned long flags)
 27 {
 28         struct host1x_device *device = to_host1x_device(drm->dev);
 29         struct tegra_drm *tegra;
 30         int err;
 31 
 32         tegra = kzalloc(sizeof(*tegra), GFP_KERNEL);
 33         if (!tegra)
 34                 return -ENOMEM;
 35 
 36         dev_set_drvdata(drm->dev, tegra);
 37         mutex_init(&tegra->clients_lock);
 38         INIT_LIST_HEAD(&tegra->clients);
 39         drm->dev_private = tegra;
 40         tegra->drm = drm;
 41 
 42         drm_mode_config_init(drm);
 43 
 44         err = host1x_device_init(device);
 45         if (err < 0)
 46                 return err;
 47 
 48         /*
 49          * We don't use the drm_irq_install() helpers provided by the DRM
 50          * core, so we need to set this manually in order to allow the
 51          * DRM_IOCTL_WAIT_VBLANK to operate correctly.
 52          */
 53         drm->irq_enabled = true;
 54 
 55         err = drm_vblank_init(drm, drm->mode_config.num_crtc);
 56         if (err < 0)
 57                 return err;
 58 
 59         err = tegra_drm_fb_init(drm);
 60         if (err < 0)
 61                 return err;
 62 
 63         drm_kms_helper_poll_init(drm);
 64 
 65         return 0;
 66 }
 67 
 68 static int tegra_drm_unload(struct drm_device *drm)
 69 {
 70         struct host1x_device *device = to_host1x_device(drm->dev);
 71         int err;
 72 
 73         drm_kms_helper_poll_fini(drm);
 74         tegra_drm_fb_exit(drm);
 75         drm_vblank_cleanup(drm);
 76         drm_mode_config_cleanup(drm);
 77 
 78         err = host1x_device_exit(device);
 79         if (err < 0)
 80                 return err;
 81 
 82         return 0;
 83 }
 84 
 85 static int tegra_drm_open(struct drm_device *drm, struct drm_file *filp)
 86 {
 87         struct tegra_drm_file *fpriv;
 88 
 89         fpriv = kzalloc(sizeof(*fpriv), GFP_KERNEL);
 90         if (!fpriv)
 91                 return -ENOMEM;
 92 
 93         INIT_LIST_HEAD(&fpriv->contexts);
 94         filp->driver_priv = fpriv;
 95 
 96         return 0;
 97 }
 98 
 99 static void tegra_drm_context_free(struct tegra_drm_context *context)
100 {
101         context->client->ops->close_channel(context);
102         kfree(context);
103 }
104 
105 static void tegra_drm_lastclose(struct drm_device *drm)
106 {
107 #ifdef CONFIG_DRM_TEGRA_FBDEV
108         struct tegra_drm *tegra = drm->dev_private;
109 
110         tegra_fbdev_restore_mode(tegra->fbdev);
111 #endif
112 }
113 
114 static struct host1x_bo *
115 host1x_bo_lookup(struct drm_device *drm, struct drm_file *file, u32 handle)
116 {
117         struct drm_gem_object *gem;
118         struct tegra_bo *bo;
119 
120         gem = drm_gem_object_lookup(drm, file, handle);
121         if (!gem)
122                 return NULL;
123 
124         mutex_lock(&drm->struct_mutex);
125         drm_gem_object_unreference(gem);
126         mutex_unlock(&drm->struct_mutex);
127 
128         bo = to_tegra_bo(gem);
129         return &bo->base;
130 }
131 
132 int tegra_drm_submit(struct tegra_drm_context *context,
133                      struct drm_tegra_submit *args, struct drm_device *drm,
134                      struct drm_file *file)
135 {
136         unsigned int num_cmdbufs = args->num_cmdbufs;
137         unsigned int num_relocs = args->num_relocs;
138         unsigned int num_waitchks = args->num_waitchks;
139         struct drm_tegra_cmdbuf __user *cmdbufs =
140                 (void __user *)(uintptr_t)args->cmdbufs;
141         struct drm_tegra_reloc __user *relocs =
142                 (void __user *)(uintptr_t)args->relocs;
143         struct drm_tegra_waitchk __user *waitchks =
144                 (void __user *)(uintptr_t)args->waitchks;
145         struct drm_tegra_syncpt syncpt;
146         struct host1x_job *job;
147         int err;
148 
149         /* We don't yet support other than one syncpt_incr struct per submit */
150         if (args->num_syncpts != 1)
151                 return -EINVAL;
152 
153         job = host1x_job_alloc(context->channel, args->num_cmdbufs,
154                                args->num_relocs, args->num_waitchks);
155         if (!job)
156                 return -ENOMEM;
157 
158         job->num_relocs = args->num_relocs;
159         job->num_waitchk = args->num_waitchks;
160         job->client = (u32)args->context;
161         job->class = context->client->base.class;
162         job->serialize = true;
163 
164         while (num_cmdbufs) {
165                 struct drm_tegra_cmdbuf cmdbuf;
166                 struct host1x_bo *bo;
167 
168                 if (copy_from_user(&cmdbuf, cmdbufs, sizeof(cmdbuf))) {
169                         err = -EFAULT;
170                         goto fail;
171                 }
172 
173                 bo = host1x_bo_lookup(drm, file, cmdbuf.handle);
174                 if (!bo) {
175                         err = -ENOENT;
176                         goto fail;
177                 }
178 
179                 host1x_job_add_gather(job, bo, cmdbuf.words, cmdbuf.offset);
180                 num_cmdbufs--;
181                 cmdbufs++;
182         }
183 
184         if (copy_from_user(job->relocarray, relocs,
185                            sizeof(*relocs) * num_relocs)) {
186                 err = -EFAULT;
187                 goto fail;
188         }
189 
190         while (num_relocs--) {
191                 struct host1x_reloc *reloc = &job->relocarray[num_relocs];
192                 struct host1x_bo *cmdbuf, *target;
193 
194                 cmdbuf = host1x_bo_lookup(drm, file, (u32)reloc->cmdbuf);
195                 target = host1x_bo_lookup(drm, file, (u32)reloc->target);
196 
197                 reloc->cmdbuf = cmdbuf;
198                 reloc->target = target;
199 
200                 if (!reloc->target || !reloc->cmdbuf) {
201                         err = -ENOENT;
202                         goto fail;
203                 }
204         }
205 
206         if (copy_from_user(job->waitchk, waitchks,
207                            sizeof(*waitchks) * num_waitchks)) {
208                 err = -EFAULT;
209                 goto fail;
210         }
211 
212         if (copy_from_user(&syncpt, (void __user *)(uintptr_t)args->syncpts,
213                            sizeof(syncpt))) {
214                 err = -EFAULT;
215                 goto fail;
216         }
217 
218         job->is_addr_reg = context->client->ops->is_addr_reg;
219         job->syncpt_incrs = syncpt.incrs;
220         job->syncpt_id = syncpt.id;
221         job->timeout = 10000;
222 
223         if (args->timeout && args->timeout < 10000)
224                 job->timeout = args->timeout;
225 
226         err = host1x_job_pin(job, context->client->base.dev);
227         if (err)
228                 goto fail;
229 
230         err = host1x_job_submit(job);
231         if (err)
232                 goto fail_submit;
233 
234         args->fence = job->syncpt_end;
235 
236         host1x_job_put(job);
237         return 0;
238 
239 fail_submit:
240         host1x_job_unpin(job);
241 fail:
242         host1x_job_put(job);
243         return err;
244 }
245 
246 
247 #ifdef CONFIG_DRM_TEGRA_STAGING
248 static struct tegra_drm_context *tegra_drm_get_context(__u64 context)
249 {
250         return (struct tegra_drm_context *)(uintptr_t)context;
251 }
252 
253 static bool tegra_drm_file_owns_context(struct tegra_drm_file *file,
254                                         struct tegra_drm_context *context)
255 {
256         struct tegra_drm_context *ctx;
257 
258         list_for_each_entry(ctx, &file->contexts, list)
259                 if (ctx == context)
260                         return true;
261 
262         return false;
263 }
264 
265 static int tegra_gem_create(struct drm_device *drm, void *data,
266                             struct drm_file *file)
267 {
268         struct drm_tegra_gem_create *args = data;
269         struct tegra_bo *bo;
270 
271         bo = tegra_bo_create_with_handle(file, drm, args->size, args->flags,
272                                          &args->handle);
273         if (IS_ERR(bo))
274                 return PTR_ERR(bo);
275 
276         return 0;
277 }
278 
279 static int tegra_gem_mmap(struct drm_device *drm, void *data,
280                           struct drm_file *file)
281 {
282         struct drm_tegra_gem_mmap *args = data;
283         struct drm_gem_object *gem;
284         struct tegra_bo *bo;
285 
286         gem = drm_gem_object_lookup(drm, file, args->handle);
287         if (!gem)
288                 return -EINVAL;
289 
290         bo = to_tegra_bo(gem);
291 
292         args->offset = drm_vma_node_offset_addr(&bo->gem.vma_node);
293 
294         drm_gem_object_unreference(gem);
295 
296         return 0;
297 }
298 
299 static int tegra_syncpt_read(struct drm_device *drm, void *data,
300                              struct drm_file *file)
301 {
302         struct host1x *host = dev_get_drvdata(drm->dev->parent);
303         struct drm_tegra_syncpt_read *args = data;
304         struct host1x_syncpt *sp;
305 
306         sp = host1x_syncpt_get(host, args->id);
307         if (!sp)
308                 return -EINVAL;
309 
310         args->value = host1x_syncpt_read_min(sp);
311         return 0;
312 }
313 
314 static int tegra_syncpt_incr(struct drm_device *drm, void *data,
315                              struct drm_file *file)
316 {
317         struct host1x *host1x = dev_get_drvdata(drm->dev->parent);
318         struct drm_tegra_syncpt_incr *args = data;
319         struct host1x_syncpt *sp;
320 
321         sp = host1x_syncpt_get(host1x, args->id);
322         if (!sp)
323                 return -EINVAL;
324 
325         return host1x_syncpt_incr(sp);
326 }
327 
328 static int tegra_syncpt_wait(struct drm_device *drm, void *data,
329                              struct drm_file *file)
330 {
331         struct host1x *host1x = dev_get_drvdata(drm->dev->parent);
332         struct drm_tegra_syncpt_wait *args = data;
333         struct host1x_syncpt *sp;
334 
335         sp = host1x_syncpt_get(host1x, args->id);
336         if (!sp)
337                 return -EINVAL;
338 
339         return host1x_syncpt_wait(sp, args->thresh, args->timeout,
340                                   &args->value);
341 }
342 
343 static int tegra_open_channel(struct drm_device *drm, void *data,
344                               struct drm_file *file)
345 {
346         struct tegra_drm_file *fpriv = file->driver_priv;
347         struct tegra_drm *tegra = drm->dev_private;
348         struct drm_tegra_open_channel *args = data;
349         struct tegra_drm_context *context;
350         struct tegra_drm_client *client;
351         int err = -ENODEV;
352 
353         context = kzalloc(sizeof(*context), GFP_KERNEL);
354         if (!context)
355                 return -ENOMEM;
356 
357         list_for_each_entry(client, &tegra->clients, list)
358                 if (client->base.class == args->client) {
359                         err = client->ops->open_channel(client, context);
360                         if (err)
361                                 break;
362 
363                         list_add(&context->list, &fpriv->contexts);
364                         args->context = (uintptr_t)context;
365                         context->client = client;
366                         return 0;
367                 }
368 
369         kfree(context);
370         return err;
371 }
372 
373 static int tegra_close_channel(struct drm_device *drm, void *data,
374                                struct drm_file *file)
375 {
376         struct tegra_drm_file *fpriv = file->driver_priv;
377         struct drm_tegra_close_channel *args = data;
378         struct tegra_drm_context *context;
379 
380         context = tegra_drm_get_context(args->context);
381 
382         if (!tegra_drm_file_owns_context(fpriv, context))
383                 return -EINVAL;
384 
385         list_del(&context->list);
386         tegra_drm_context_free(context);
387 
388         return 0;
389 }
390 
391 static int tegra_get_syncpt(struct drm_device *drm, void *data,
392                             struct drm_file *file)
393 {
394         struct tegra_drm_file *fpriv = file->driver_priv;
395         struct drm_tegra_get_syncpt *args = data;
396         struct tegra_drm_context *context;
397         struct host1x_syncpt *syncpt;
398 
399         context = tegra_drm_get_context(args->context);
400 
401         if (!tegra_drm_file_owns_context(fpriv, context))
402                 return -ENODEV;
403 
404         if (args->index >= context->client->base.num_syncpts)
405                 return -EINVAL;
406 
407         syncpt = context->client->base.syncpts[args->index];
408         args->id = host1x_syncpt_id(syncpt);
409 
410         return 0;
411 }
412 
413 static int tegra_submit(struct drm_device *drm, void *data,
414                         struct drm_file *file)
415 {
416         struct tegra_drm_file *fpriv = file->driver_priv;
417         struct drm_tegra_submit *args = data;
418         struct tegra_drm_context *context;
419 
420         context = tegra_drm_get_context(args->context);
421 
422         if (!tegra_drm_file_owns_context(fpriv, context))
423                 return -ENODEV;
424 
425         return context->client->ops->submit(context, args, drm, file);
426 }
427 
428 static int tegra_get_syncpt_base(struct drm_device *drm, void *data,
429                                  struct drm_file *file)
430 {
431         struct tegra_drm_file *fpriv = file->driver_priv;
432         struct drm_tegra_get_syncpt_base *args = data;
433         struct tegra_drm_context *context;
434         struct host1x_syncpt_base *base;
435         struct host1x_syncpt *syncpt;
436 
437         context = tegra_drm_get_context(args->context);
438 
439         if (!tegra_drm_file_owns_context(fpriv, context))
440                 return -ENODEV;
441 
442         if (args->syncpt >= context->client->base.num_syncpts)
443                 return -EINVAL;
444 
445         syncpt = context->client->base.syncpts[args->syncpt];
446 
447         base = host1x_syncpt_get_base(syncpt);
448         if (!base)
449                 return -ENXIO;
450 
451         args->id = host1x_syncpt_base_id(base);
452 
453         return 0;
454 }
455 #endif
456 
457 static const struct drm_ioctl_desc tegra_drm_ioctls[] = {
458 #ifdef CONFIG_DRM_TEGRA_STAGING
459         DRM_IOCTL_DEF_DRV(TEGRA_GEM_CREATE, tegra_gem_create, DRM_UNLOCKED | DRM_AUTH),
460         DRM_IOCTL_DEF_DRV(TEGRA_GEM_MMAP, tegra_gem_mmap, DRM_UNLOCKED),
461         DRM_IOCTL_DEF_DRV(TEGRA_SYNCPT_READ, tegra_syncpt_read, DRM_UNLOCKED),
462         DRM_IOCTL_DEF_DRV(TEGRA_SYNCPT_INCR, tegra_syncpt_incr, DRM_UNLOCKED),
463         DRM_IOCTL_DEF_DRV(TEGRA_SYNCPT_WAIT, tegra_syncpt_wait, DRM_UNLOCKED),
464         DRM_IOCTL_DEF_DRV(TEGRA_OPEN_CHANNEL, tegra_open_channel, DRM_UNLOCKED),
465         DRM_IOCTL_DEF_DRV(TEGRA_CLOSE_CHANNEL, tegra_close_channel, DRM_UNLOCKED),
466         DRM_IOCTL_DEF_DRV(TEGRA_GET_SYNCPT, tegra_get_syncpt, DRM_UNLOCKED),
467         DRM_IOCTL_DEF_DRV(TEGRA_SUBMIT, tegra_submit, DRM_UNLOCKED),
468         DRM_IOCTL_DEF_DRV(TEGRA_GET_SYNCPT_BASE, tegra_get_syncpt_base, DRM_UNLOCKED),
469 #endif
470 };
471 
472 static const struct file_operations tegra_drm_fops = {
473         .owner = THIS_MODULE,
474         .open = drm_open,
475         .release = drm_release,
476         .unlocked_ioctl = drm_ioctl,
477         .mmap = tegra_drm_mmap,
478         .poll = drm_poll,
479         .read = drm_read,
480 #ifdef CONFIG_COMPAT
481         .compat_ioctl = drm_compat_ioctl,
482 #endif
483         .llseek = noop_llseek,
484 };
485 
486 static struct drm_crtc *tegra_crtc_from_pipe(struct drm_device *drm, int pipe)
487 {
488         struct drm_crtc *crtc;
489 
490         list_for_each_entry(crtc, &drm->mode_config.crtc_list, head) {
491                 struct tegra_dc *dc = to_tegra_dc(crtc);
492 
493                 if (dc->pipe == pipe)
494                         return crtc;
495         }
496 
497         return NULL;
498 }
499 
500 static u32 tegra_drm_get_vblank_counter(struct drm_device *dev, int crtc)
501 {
502         /* TODO: implement real hardware counter using syncpoints */
503         return drm_vblank_count(dev, crtc);
504 }
505 
506 static int tegra_drm_enable_vblank(struct drm_device *drm, int pipe)
507 {
508         struct drm_crtc *crtc = tegra_crtc_from_pipe(drm, pipe);
509         struct tegra_dc *dc = to_tegra_dc(crtc);
510 
511         if (!crtc)
512                 return -ENODEV;
513 
514         tegra_dc_enable_vblank(dc);
515 
516         return 0;
517 }
518 
519 static void tegra_drm_disable_vblank(struct drm_device *drm, int pipe)
520 {
521         struct drm_crtc *crtc = tegra_crtc_from_pipe(drm, pipe);
522         struct tegra_dc *dc = to_tegra_dc(crtc);
523 
524         if (crtc)
525                 tegra_dc_disable_vblank(dc);
526 }
527 
528 static void tegra_drm_preclose(struct drm_device *drm, struct drm_file *file)
529 {
530         struct tegra_drm_file *fpriv = file->driver_priv;
531         struct tegra_drm_context *context, *tmp;
532         struct drm_crtc *crtc;
533 
534         list_for_each_entry(crtc, &drm->mode_config.crtc_list, head)
535                 tegra_dc_cancel_page_flip(crtc, file);
536 
537         list_for_each_entry_safe(context, tmp, &fpriv->contexts, list)
538                 tegra_drm_context_free(context);
539 
540         kfree(fpriv);
541 }
542 
543 #ifdef CONFIG_DEBUG_FS
544 static int tegra_debugfs_framebuffers(struct seq_file *s, void *data)
545 {
546         struct drm_info_node *node = (struct drm_info_node *)s->private;
547         struct drm_device *drm = node->minor->dev;
548         struct drm_framebuffer *fb;
549 
550         mutex_lock(&drm->mode_config.fb_lock);
551 
552         list_for_each_entry(fb, &drm->mode_config.fb_list, head) {
553                 seq_printf(s, "%3d: user size: %d x %d, depth %d, %d bpp, refcount %d\n",
554                            fb->base.id, fb->width, fb->height, fb->depth,
555                            fb->bits_per_pixel,
556                            atomic_read(&fb->refcount.refcount));
557         }
558 
559         mutex_unlock(&drm->mode_config.fb_lock);
560 
561         return 0;
562 }
563 
564 static struct drm_info_list tegra_debugfs_list[] = {
565         { "framebuffers", tegra_debugfs_framebuffers, 0 },
566 };
567 
568 static int tegra_debugfs_init(struct drm_minor *minor)
569 {
570         return drm_debugfs_create_files(tegra_debugfs_list,
571                                         ARRAY_SIZE(tegra_debugfs_list),
572                                         minor->debugfs_root, minor);
573 }
574 
575 static void tegra_debugfs_cleanup(struct drm_minor *minor)
576 {
577         drm_debugfs_remove_files(tegra_debugfs_list,
578                                  ARRAY_SIZE(tegra_debugfs_list), minor);
579 }
580 #endif
581 
582 static struct drm_driver tegra_drm_driver = {
583         .driver_features = DRIVER_MODESET | DRIVER_GEM | DRIVER_PRIME,
584         .load = tegra_drm_load,
585         .unload = tegra_drm_unload,
586         .open = tegra_drm_open,
587         .preclose = tegra_drm_preclose,
588         .lastclose = tegra_drm_lastclose,
589 
590         .get_vblank_counter = tegra_drm_get_vblank_counter,
591         .enable_vblank = tegra_drm_enable_vblank,
592         .disable_vblank = tegra_drm_disable_vblank,
593 
594 #if defined(CONFIG_DEBUG_FS)
595         .debugfs_init = tegra_debugfs_init,
596         .debugfs_cleanup = tegra_debugfs_cleanup,
597 #endif
598 
599         .gem_free_object = tegra_bo_free_object,
600         .gem_vm_ops = &tegra_bo_vm_ops,
601 
602         .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
603         .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
604         .gem_prime_export = tegra_gem_prime_export,
605         .gem_prime_import = tegra_gem_prime_import,
606 
607         .dumb_create = tegra_bo_dumb_create,
608         .dumb_map_offset = tegra_bo_dumb_map_offset,
609         .dumb_destroy = drm_gem_dumb_destroy,
610 
611         .ioctls = tegra_drm_ioctls,
612         .num_ioctls = ARRAY_SIZE(tegra_drm_ioctls),
613         .fops = &tegra_drm_fops,
614 
615         .name = DRIVER_NAME,
616         .desc = DRIVER_DESC,
617         .date = DRIVER_DATE,
618         .major = DRIVER_MAJOR,
619         .minor = DRIVER_MINOR,
620         .patchlevel = DRIVER_PATCHLEVEL,
621 };
622 
623 int tegra_drm_register_client(struct tegra_drm *tegra,
624                               struct tegra_drm_client *client)
625 {
626         mutex_lock(&tegra->clients_lock);
627         list_add_tail(&client->list, &tegra->clients);
628         mutex_unlock(&tegra->clients_lock);
629 
630         return 0;
631 }
632 
633 int tegra_drm_unregister_client(struct tegra_drm *tegra,
634                                 struct tegra_drm_client *client)
635 {
636         mutex_lock(&tegra->clients_lock);
637         list_del_init(&client->list);
638         mutex_unlock(&tegra->clients_lock);
639 
640         return 0;
641 }
642 
643 static int host1x_drm_probe(struct host1x_device *device)
644 {
645         return drm_host1x_init(&tegra_drm_driver, device);
646 }
647 
648 static int host1x_drm_remove(struct host1x_device *device)
649 {
650         drm_host1x_exit(&tegra_drm_driver, device);
651 
652         return 0;
653 }
654 
655 static const struct of_device_id host1x_drm_subdevs[] = {
656         { .compatible = "nvidia,tegra20-dc", },
657         { .compatible = "nvidia,tegra20-hdmi", },
658         { .compatible = "nvidia,tegra20-gr2d", },
659         { .compatible = "nvidia,tegra20-gr3d", },
660         { .compatible = "nvidia,tegra30-dc", },
661         { .compatible = "nvidia,tegra30-hdmi", },
662         { .compatible = "nvidia,tegra30-gr2d", },
663         { .compatible = "nvidia,tegra30-gr3d", },
664         { .compatible = "nvidia,tegra114-dsi", },
665         { .compatible = "nvidia,tegra114-hdmi", },
666         { .compatible = "nvidia,tegra114-gr3d", },
667         { .compatible = "nvidia,tegra124-dc", },
668         { .compatible = "nvidia,tegra124-sor", },
669         { /* sentinel */ }
670 };
671 
672 static struct host1x_driver host1x_drm_driver = {
673         .name = "drm",
674         .probe = host1x_drm_probe,
675         .remove = host1x_drm_remove,
676         .subdevs = host1x_drm_subdevs,
677 };
678 
679 static int __init host1x_drm_init(void)
680 {
681         int err;
682 
683         err = host1x_driver_register(&host1x_drm_driver);
684         if (err < 0)
685                 return err;
686 
687         err = platform_driver_register(&tegra_dc_driver);
688         if (err < 0)
689                 goto unregister_host1x;
690 
691         err = platform_driver_register(&tegra_dsi_driver);
692         if (err < 0)
693                 goto unregister_dc;
694 
695         err = platform_driver_register(&tegra_sor_driver);
696         if (err < 0)
697                 goto unregister_dsi;
698 
699         err = platform_driver_register(&tegra_hdmi_driver);
700         if (err < 0)
701                 goto unregister_sor;
702 
703         err = platform_driver_register(&tegra_dpaux_driver);
704         if (err < 0)
705                 goto unregister_hdmi;
706 
707         err = platform_driver_register(&tegra_gr2d_driver);
708         if (err < 0)
709                 goto unregister_dpaux;
710 
711         err = platform_driver_register(&tegra_gr3d_driver);
712         if (err < 0)
713                 goto unregister_gr2d;
714 
715         return 0;
716 
717 unregister_gr2d:
718         platform_driver_unregister(&tegra_gr2d_driver);
719 unregister_dpaux:
720         platform_driver_unregister(&tegra_dpaux_driver);
721 unregister_hdmi:
722         platform_driver_unregister(&tegra_hdmi_driver);
723 unregister_sor:
724         platform_driver_unregister(&tegra_sor_driver);
725 unregister_dsi:
726         platform_driver_unregister(&tegra_dsi_driver);
727 unregister_dc:
728         platform_driver_unregister(&tegra_dc_driver);
729 unregister_host1x:
730         host1x_driver_unregister(&host1x_drm_driver);
731         return err;
732 }
733 module_init(host1x_drm_init);
734 
735 static void __exit host1x_drm_exit(void)
736 {
737         platform_driver_unregister(&tegra_gr3d_driver);
738         platform_driver_unregister(&tegra_gr2d_driver);
739         platform_driver_unregister(&tegra_dpaux_driver);
740         platform_driver_unregister(&tegra_hdmi_driver);
741         platform_driver_unregister(&tegra_sor_driver);
742         platform_driver_unregister(&tegra_dsi_driver);
743         platform_driver_unregister(&tegra_dc_driver);
744         host1x_driver_unregister(&host1x_drm_driver);
745 }
746 module_exit(host1x_drm_exit);
747 
748 MODULE_AUTHOR("Thierry Reding <thierry.reding@avionic-design.de>");
749 MODULE_DESCRIPTION("NVIDIA Tegra DRM driver");
750 MODULE_LICENSE("GPL v2");
751 

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