drivers/gpu/drm/panfrost/panfrost_drv.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /* Copyright 2018 Marty E. Plummer <[email protected]> */
   3 /* Copyright 2019 Linaro, Ltd., Rob Herring <[email protected]> */
   4 /* Copyright 2019 Collabora ltd. */
   5
   6 #include <linux/module.h>
   7 #include <linux/of_platform.h>
   8 #include <linux/pagemap.h>
   9 #include <linux/pm_runtime.h>
  10 #include <drm/panfrost_drm.h>
  11 #include <drm/drm_drv.h>
  12 #include <drm/drm_ioctl.h>
  13 #include <drm/drm_syncobj.h>
  14 #include <drm/drm_utils.h>
  15
  16 #include "panfrost_device.h"
  17 #include "panfrost_gem.h"
  18 #include "panfrost_mmu.h"
  19 #include "panfrost_job.h"
  20 #include "panfrost_gpu.h"
  21 #include "panfrost_perfcnt.h"
  22
  23 static bool unstable_ioctls;
  24 module_param_unsafe(unstable_ioctls, bool, 0600);
  25
  26 static int panfrost_ioctl_get_param(struct drm_device *ddev, void *data, struct drm_file *file)
  27 {
  28         struct drm_panfrost_get_param *param = data;
  29         struct panfrost_device *pfdev = ddev->dev_private;
  30
  31         if (param->pad != 0)
  32                 return -EINVAL;
  33
  34 #define PANFROST_FEATURE(name, member)                  \
  35         case DRM_PANFROST_PARAM_ ## name:               \
  36                 param->value = pfdev->features.member;  \
  37                 break
  38 #define PANFROST_FEATURE_ARRAY(name, member, max)                       \
  39         case DRM_PANFROST_PARAM_ ## name ## 0 ...                       \
  40                 DRM_PANFROST_PARAM_ ## name ## max:                     \
  41                 param->value = pfdev->features.member[param->param -    \
  42                         DRM_PANFROST_PARAM_ ## name ## 0];              \
  43                 break
  44
  45         switch (param->param) {
  46                 PANFROST_FEATURE(GPU_PROD_ID, id);
  47                 PANFROST_FEATURE(GPU_REVISION, revision);
  48                 PANFROST_FEATURE(SHADER_PRESENT, shader_present);
  49                 PANFROST_FEATURE(TILER_PRESENT, tiler_present);
  50                 PANFROST_FEATURE(L2_PRESENT, l2_present);
  51                 PANFROST_FEATURE(STACK_PRESENT, stack_present);
  52                 PANFROST_FEATURE(AS_PRESENT, as_present);
  53                 PANFROST_FEATURE(JS_PRESENT, js_present);
  54                 PANFROST_FEATURE(L2_FEATURES, l2_features);
  55                 PANFROST_FEATURE(CORE_FEATURES, core_features);
  56                 PANFROST_FEATURE(TILER_FEATURES, tiler_features);
  57                 PANFROST_FEATURE(MEM_FEATURES, mem_features);
  58                 PANFROST_FEATURE(MMU_FEATURES, mmu_features);
  59                 PANFROST_FEATURE(THREAD_FEATURES, thread_features);
  60                 PANFROST_FEATURE(MAX_THREADS, max_threads);
  61                 PANFROST_FEATURE(THREAD_MAX_WORKGROUP_SZ,
  62                                 thread_max_workgroup_sz);
  63                 PANFROST_FEATURE(THREAD_MAX_BARRIER_SZ,
  64                                 thread_max_barrier_sz);
  65                 PANFROST_FEATURE(COHERENCY_FEATURES, coherency_features);
  66                 PANFROST_FEATURE(AFBC_FEATURES, afbc_features);
  67                 PANFROST_FEATURE_ARRAY(TEXTURE_FEATURES, texture_features, 3);
  68                 PANFROST_FEATURE_ARRAY(JS_FEATURES, js_features, 15);
  69                 PANFROST_FEATURE(NR_CORE_GROUPS, nr_core_groups);
  70                 PANFROST_FEATURE(THREAD_TLS_ALLOC, thread_tls_alloc);
  71         default:
  72                 return -EINVAL;
  73         }
  74
  75         return 0;
  76 }
  77
  78 static int panfrost_ioctl_create_bo(struct drm_device *dev, void *data,
  79                 struct drm_file *file)
  80 {
  81         struct panfrost_file_priv *priv = file->driver_priv;
  82         struct panfrost_gem_object *bo;
  83         struct drm_panfrost_create_bo *args = data;
  84         struct panfrost_gem_mapping *mapping;
  85         int ret;
  86
  87         if (!args->size || args->pad ||
  88             (args->flags & ~(PANFROST_BO_NOEXEC | PANFROST_BO_HEAP)))
  89                 return -EINVAL;
  90
  91         /* Heaps should never be executable */
  92         if ((args->flags & PANFROST_BO_HEAP) &&
  93             !(args->flags & PANFROST_BO_NOEXEC))
  94                 return -EINVAL;
  95
  96         bo = panfrost_gem_create(dev, args->size, args->flags);
  97         if (IS_ERR(bo))
  98                 return PTR_ERR(bo);
  99
 100         ret = drm_gem_handle_create(file, &bo->base.base, &args->handle);
 101         if (ret)
 102                 goto out;
 103
 104         mapping = panfrost_gem_mapping_get(bo, priv);
 105         if (mapping) {
 106                 args->offset = mapping->mmnode.start << PAGE_SHIFT;
 107                 panfrost_gem_mapping_put(mapping);
 108         } else {
 109                 /* This can only happen if the handle from
 110                  * drm_gem_handle_create() has already been guessed and freed
 111                  * by user space
 112                  */
 113                 ret = -EINVAL;
 114         }
 115
 116 out:
 117         drm_gem_object_put(&bo->base.base);
 118         return ret;
 119 }
 120
 121 /**
 122  * panfrost_lookup_bos() - Sets up job->bo[] with the GEM objects
 123  * referenced by the job.
 124  * @dev: DRM device
 125  * @file_priv: DRM file for this fd
 126  * @args: IOCTL args
 127  * @job: job being set up
 128  *
 129  * Resolve handles from userspace to BOs and attach them to job.
 130  *
 131  * Note that this function doesn't need to unreference the BOs on
 132  * failure, because that will happen at panfrost_job_cleanup() time.
 133  */
 134 static int
 135 panfrost_lookup_bos(struct drm_device *dev,
 136                   struct drm_file *file_priv,
 137                   struct drm_panfrost_submit *args,
 138                   struct panfrost_job *job)
 139 {
 140         struct panfrost_file_priv *priv = file_priv->driver_priv;
 141         struct panfrost_gem_object *bo;
 142         unsigned int i;
 143         int ret;
 144
 145         job->bo_count = args->bo_handle_count;
 146
 147         if (!job->bo_count)
 148                 return 0;
 149
 150         ret = drm_gem_objects_lookup(file_priv,
 151                                      (void __user *)(uintptr_t)args->bo_handles,
 152                                      job->bo_count, &job->bos);
 153         if (ret)
 154                 return ret;
 155
 156         job->mappings = kvmalloc_array(job->bo_count,
 157                                        sizeof(struct panfrost_gem_mapping *),
 158                                        GFP_KERNEL | __GFP_ZERO);
 159         if (!job->mappings)
 160                 return -ENOMEM;
 161
 162         for (i = 0; i < job->bo_count; i++) {
 163                 struct panfrost_gem_mapping *mapping;
 164
 165                 bo = to_panfrost_bo(job->bos[i]);
 166                 mapping = panfrost_gem_mapping_get(bo, priv);
 167                 if (!mapping) {
 168                         ret = -EINVAL;
 169                         break;
 170                 }
 171
 172                 atomic_inc(&bo->gpu_usecount);
 173                 job->mappings[i] = mapping;
 174         }
 175
 176         return ret;
 177 }
 178
 179 /**
 180  * panfrost_copy_in_sync() - Sets up job->deps with the sync objects
 181  * referenced by the job.
 182  * @dev: DRM device
 183  * @file_priv: DRM file for this fd
 184  * @args: IOCTL args
 185  * @job: job being set up
 186  *
 187  * Resolve syncobjs from userspace to fences and attach them to job.
 188  *
 189  * Note that this function doesn't need to unreference the fences on
 190  * failure, because that will happen at panfrost_job_cleanup() time.
 191  */
 192 static int
 193 panfrost_copy_in_sync(struct drm_device *dev,
 194                   struct drm_file *file_priv,
 195                   struct drm_panfrost_submit *args,
 196                   struct panfrost_job *job)
 197 {
 198         u32 *handles;
 199         int ret = 0;
 200         int i, in_fence_count;
 201
 202         in_fence_count = args->in_sync_count;
 203
 204         if (!in_fence_count)
 205                 return 0;
 206
 207         handles = kvmalloc_array(in_fence_count, sizeof(u32), GFP_KERNEL);
 208         if (!handles) {
 209                 ret = -ENOMEM;
 210                 DRM_DEBUG("Failed to allocate incoming syncobj handles\n");
 211                 goto fail;
 212         }
 213
 214         if (copy_from_user(handles,
 215                            (void __user *)(uintptr_t)args->in_syncs,
 216                            in_fence_count * sizeof(u32))) {
 217                 ret = -EFAULT;
 218                 DRM_DEBUG("Failed to copy in syncobj handles\n");
 219                 goto fail;
 220         }
 221
 222         for (i = 0; i < in_fence_count; i++) {
 223                 ret = drm_sched_job_add_syncobj_dependency(&job->base, file_priv,
 224                                                            handles[i], 0);
 225                 if (ret)
 226                         goto fail;
 227         }
 228
 229 fail:
 230         kvfree(handles);
 231         return ret;
 232 }
 233
 234 static int panfrost_ioctl_submit(struct drm_device *dev, void *data,
 235                 struct drm_file *file)
 236 {
 237         struct panfrost_device *pfdev = dev->dev_private;
 238         struct panfrost_file_priv *file_priv = file->driver_priv;
 239         struct drm_panfrost_submit *args = data;
 240         struct drm_syncobj *sync_out = NULL;
 241         struct panfrost_job *job;
 242         int ret = 0, slot;
 243
 244         if (!args->jc)
 245                 return -EINVAL;
 246
 247         if (args->requirements && args->requirements != PANFROST_JD_REQ_FS)
 248                 return -EINVAL;
 249
 250         if (args->out_sync > 0) {
 251                 sync_out = drm_syncobj_find(file, args->out_sync);
 252                 if (!sync_out)
 253                         return -ENODEV;
 254         }
 255
 256         job = kzalloc(sizeof(*job), GFP_KERNEL);
 257         if (!job) {
 258                 ret = -ENOMEM;
 259                 goto out_put_syncout;
 260         }
 261
 262         kref_init(&job->refcount);
 263
 264         job->pfdev = pfdev;
 265         job->jc = args->jc;
 266         job->requirements = args->requirements;
 267         job->flush_id = panfrost_gpu_get_latest_flush_id(pfdev);
 268         job->mmu = file_priv->mmu;
 269
 270         slot = panfrost_job_get_slot(job);
 271
 272         ret = drm_sched_job_init(&job->base,
 273                                  &file_priv->sched_entity[slot],
 274                                  NULL);
 275         if (ret)
 276                 goto out_put_job;
 277
 278         ret = panfrost_copy_in_sync(dev, file, args, job);
 279         if (ret)
 280                 goto out_cleanup_job;
 281
 282         ret = panfrost_lookup_bos(dev, file, args, job);
 283         if (ret)
 284                 goto out_cleanup_job;
 285
 286         ret = panfrost_job_push(job);
 287         if (ret)
 288                 goto out_cleanup_job;
 289
 290         /* Update the return sync object for the job */
 291         if (sync_out)
 292                 drm_syncobj_replace_fence(sync_out, job->render_done_fence);
 293
 294 out_cleanup_job:
 295         if (ret)
 296                 drm_sched_job_cleanup(&job->base);
 297 out_put_job:
 298         panfrost_job_put(job);
 299 out_put_syncout:
 300         if (sync_out)
 301                 drm_syncobj_put(sync_out);
 302
 303         return ret;
 304 }
 305
 306 static int
 307 panfrost_ioctl_wait_bo(struct drm_device *dev, void *data,
 308                        struct drm_file *file_priv)
 309 {
 310         long ret;
 311         struct drm_panfrost_wait_bo *args = data;
 312         struct drm_gem_object *gem_obj;
 313         unsigned long timeout = drm_timeout_abs_to_jiffies(args->timeout_ns);
 314
 315         if (args->pad)
 316                 return -EINVAL;
 317
 318         gem_obj = drm_gem_object_lookup(file_priv, args->handle);
 319         if (!gem_obj)
 320                 return -ENOENT;
 321
 322         ret = dma_resv_wait_timeout(gem_obj->resv, DMA_RESV_USAGE_READ,
 323                                     true, timeout);
 324         if (!ret)
 325                 ret = timeout ? -ETIMEDOUT : -EBUSY;
 326
 327         drm_gem_object_put(gem_obj);
 328
 329         return ret;
 330 }
 331
 332 static int panfrost_ioctl_mmap_bo(struct drm_device *dev, void *data,
 333                       struct drm_file *file_priv)
 334 {
 335         struct drm_panfrost_mmap_bo *args = data;
 336         struct drm_gem_object *gem_obj;
 337         int ret;
 338
 339         if (args->flags != 0) {
 340                 DRM_INFO("unknown mmap_bo flags: %d\n", args->flags);
 341                 return -EINVAL;
 342         }
 343
 344         gem_obj = drm_gem_object_lookup(file_priv, args->handle);
 345         if (!gem_obj) {
 346                 DRM_DEBUG("Failed to look up GEM BO %d\n", args->handle);
 347                 return -ENOENT;
 348         }
 349
 350         /* Don't allow mmapping of heap objects as pages are not pinned. */
 351         if (to_panfrost_bo(gem_obj)->is_heap) {
 352                 ret = -EINVAL;
 353                 goto out;
 354         }
 355
 356         ret = drm_gem_create_mmap_offset(gem_obj);
 357         if (ret == 0)
 358                 args->offset = drm_vma_node_offset_addr(&gem_obj->vma_node);
 359
 360 out:
 361         drm_gem_object_put(gem_obj);
 362         return ret;
 363 }
 364
 365 static int panfrost_ioctl_get_bo_offset(struct drm_device *dev, void *data,
 366                             struct drm_file *file_priv)
 367 {
 368         struct panfrost_file_priv *priv = file_priv->driver_priv;
 369         struct drm_panfrost_get_bo_offset *args = data;
 370         struct panfrost_gem_mapping *mapping;
 371         struct drm_gem_object *gem_obj;
 372         struct panfrost_gem_object *bo;
 373
 374         gem_obj = drm_gem_object_lookup(file_priv, args->handle);
 375         if (!gem_obj) {
 376                 DRM_DEBUG("Failed to look up GEM BO %d\n", args->handle);
 377                 return -ENOENT;
 378         }
 379         bo = to_panfrost_bo(gem_obj);
 380
 381         mapping = panfrost_gem_mapping_get(bo, priv);
 382         drm_gem_object_put(gem_obj);
 383
 384         if (!mapping)
 385                 return -EINVAL;
 386
 387         args->offset = mapping->mmnode.start << PAGE_SHIFT;
 388         panfrost_gem_mapping_put(mapping);
 389         return 0;
 390 }
 391
 392 static int panfrost_ioctl_madvise(struct drm_device *dev, void *data,
 393                                   struct drm_file *file_priv)
 394 {
 395         struct panfrost_file_priv *priv = file_priv->driver_priv;
 396         struct drm_panfrost_madvise *args = data;
 397         struct panfrost_device *pfdev = dev->dev_private;
 398         struct drm_gem_object *gem_obj;
 399         struct panfrost_gem_object *bo;
 400         int ret = 0;
 401
 402         gem_obj = drm_gem_object_lookup(file_priv, args->handle);
 403         if (!gem_obj) {
 404                 DRM_DEBUG("Failed to look up GEM BO %d\n", args->handle);
 405                 return -ENOENT;
 406         }
 407
 408         bo = to_panfrost_bo(gem_obj);
 409
 410         mutex_lock(&pfdev->shrinker_lock);
 411         mutex_lock(&bo->mappings.lock);
 412         if (args->madv == PANFROST_MADV_DONTNEED) {
 413                 struct panfrost_gem_mapping *first;
 414
 415                 first = list_first_entry(&bo->mappings.list,
 416                                          struct panfrost_gem_mapping,
 417                                          node);
 418
 419                 /*
 420                  * If we want to mark the BO purgeable, there must be only one
 421                  * user: the caller FD.
 422                  * We could do something smarter and mark the BO purgeable only
 423                  * when all its users have marked it purgeable, but globally
 424                  * visible/shared BOs are likely to never be marked purgeable
 425                  * anyway, so let's not bother.
 426                  */
 427                 if (!list_is_singular(&bo->mappings.list) ||
 428                     WARN_ON_ONCE(first->mmu != priv->mmu)) {
 429                         ret = -EINVAL;
 430                         goto out_unlock_mappings;
 431                 }
 432         }
 433
 434         args->retained = drm_gem_shmem_madvise(&bo->base, args->madv);
 435
 436         if (args->retained) {
 437                 if (args->madv == PANFROST_MADV_DONTNEED)
 438                         list_move_tail(&bo->base.madv_list,
 439                                        &pfdev->shrinker_list);
 440                 else if (args->madv == PANFROST_MADV_WILLNEED)
 441                         list_del_init(&bo->base.madv_list);
 442         }
 443
 444 out_unlock_mappings:
 445         mutex_unlock(&bo->mappings.lock);
 446         mutex_unlock(&pfdev->shrinker_lock);
 447
 448         drm_gem_object_put(gem_obj);
 449         return ret;
 450 }
 451
 452 int panfrost_unstable_ioctl_check(void)
 453 {
 454         if (!unstable_ioctls)
 455                 return -ENOSYS;
 456
 457         return 0;
 458 }
 459
 460 static int
 461 panfrost_open(struct drm_device *dev, struct drm_file *file)
 462 {
 463         int ret;
 464         struct panfrost_device *pfdev = dev->dev_private;
 465         struct panfrost_file_priv *panfrost_priv;
 466
 467         panfrost_priv = kzalloc(sizeof(*panfrost_priv), GFP_KERNEL);
 468         if (!panfrost_priv)
 469                 return -ENOMEM;
 470
 471         panfrost_priv->pfdev = pfdev;
 472         file->driver_priv = panfrost_priv;
 473
 474         panfrost_priv->mmu = panfrost_mmu_ctx_create(pfdev);
 475         if (IS_ERR(panfrost_priv->mmu)) {
 476                 ret = PTR_ERR(panfrost_priv->mmu);
 477                 goto err_free;
 478         }
 479
 480         ret = panfrost_job_open(panfrost_priv);
 481         if (ret)
 482                 goto err_job;
 483
 484         return 0;
 485
 486 err_job:
 487         panfrost_mmu_ctx_put(panfrost_priv->mmu);
 488 err_free:
 489         kfree(panfrost_priv);
 490         return ret;
 491 }
 492
 493 static void
 494 panfrost_postclose(struct drm_device *dev, struct drm_file *file)
 495 {
 496         struct panfrost_file_priv *panfrost_priv = file->driver_priv;
 497
 498         panfrost_perfcnt_close(file);
 499         panfrost_job_close(panfrost_priv);
 500
 501         panfrost_mmu_ctx_put(panfrost_priv->mmu);
 502         kfree(panfrost_priv);
 503 }
 504
 505 static const struct drm_ioctl_desc panfrost_drm_driver_ioctls[] = {
 506 #define PANFROST_IOCTL(n, func, flags) \
 507         DRM_IOCTL_DEF_DRV(PANFROST_##n, panfrost_ioctl_##func, flags)
 508
 509         PANFROST_IOCTL(SUBMIT,          submit,         DRM_RENDER_ALLOW),
 510         PANFROST_IOCTL(WAIT_BO,         wait_bo,        DRM_RENDER_ALLOW),
 511         PANFROST_IOCTL(CREATE_BO,       create_bo,      DRM_RENDER_ALLOW),
 512         PANFROST_IOCTL(MMAP_BO,         mmap_bo,        DRM_RENDER_ALLOW),
 513         PANFROST_IOCTL(GET_PARAM,       get_param,      DRM_RENDER_ALLOW),
 514         PANFROST_IOCTL(GET_BO_OFFSET,   get_bo_offset,  DRM_RENDER_ALLOW),
 515         PANFROST_IOCTL(PERFCNT_ENABLE,  perfcnt_enable, DRM_RENDER_ALLOW),
 516         PANFROST_IOCTL(PERFCNT_DUMP,    perfcnt_dump,   DRM_RENDER_ALLOW),
 517         PANFROST_IOCTL(MADVISE,         madvise,        DRM_RENDER_ALLOW),
 518 };
 519
 520 DEFINE_DRM_GEM_FOPS(panfrost_drm_driver_fops);
 521
 522 /*
 523  * Panfrost driver version:
 524  * - 1.0 - initial interface
 525  * - 1.1 - adds HEAP and NOEXEC flags for CREATE_BO
 526  * - 1.2 - adds AFBC_FEATURES query
 527  */
 528 static const struct drm_driver panfrost_drm_driver = {
 529         .driver_features        = DRIVER_RENDER | DRIVER_GEM | DRIVER_SYNCOBJ,
 530         .open                   = panfrost_open,
 531         .postclose              = panfrost_postclose,
 532         .ioctls                 = panfrost_drm_driver_ioctls,
 533         .num_ioctls             = ARRAY_SIZE(panfrost_drm_driver_ioctls),
 534         .fops                   = &panfrost_drm_driver_fops,
 535         .name                   = "panfrost",
 536         .desc                   = "panfrost DRM",
 537         .date                   = "20180908",
 538         .major                  = 1,
 539         .minor                  = 2,
 540
 541         .gem_create_object      = panfrost_gem_create_object,
 542         .prime_handle_to_fd     = drm_gem_prime_handle_to_fd,
 543         .prime_fd_to_handle     = drm_gem_prime_fd_to_handle,
 544         .gem_prime_import_sg_table = panfrost_gem_prime_import_sg_table,
 545         .gem_prime_mmap         = drm_gem_prime_mmap,
 546 };
 547
 548 static int panfrost_probe(struct platform_device *pdev)
 549 {
 550         struct panfrost_device *pfdev;
 551         struct drm_device *ddev;
 552         int err;
 553
 554         pfdev = devm_kzalloc(&pdev->dev, sizeof(*pfdev), GFP_KERNEL);
 555         if (!pfdev)
 556                 return -ENOMEM;
 557
 558         pfdev->pdev = pdev;
 559         pfdev->dev = &pdev->dev;
 560
 561         platform_set_drvdata(pdev, pfdev);
 562
 563         pfdev->comp = of_device_get_match_data(&pdev->dev);
 564         if (!pfdev->comp)
 565                 return -ENODEV;
 566
 567         pfdev->coherent = device_get_dma_attr(&pdev->dev) == DEV_DMA_COHERENT;
 568
 569         /* Allocate and initialize the DRM device. */
 570         ddev = drm_dev_alloc(&panfrost_drm_driver, &pdev->dev);
 571         if (IS_ERR(ddev))
 572                 return PTR_ERR(ddev);
 573
 574         ddev->dev_private = pfdev;
 575         pfdev->ddev = ddev;
 576
 577         mutex_init(&pfdev->shrinker_lock);
 578         INIT_LIST_HEAD(&pfdev->shrinker_list);
 579
 580         err = panfrost_device_init(pfdev);
 581         if (err) {
 582                 if (err != -EPROBE_DEFER)
 583                         dev_err(&pdev->dev, "Fatal error during GPU init\n");
 584                 goto err_out0;
 585         }
 586
 587         pm_runtime_set_active(pfdev->dev);
 588         pm_runtime_mark_last_busy(pfdev->dev);
 589         pm_runtime_enable(pfdev->dev);
 590         pm_runtime_set_autosuspend_delay(pfdev->dev, 50); /* ~3 frames */
 591         pm_runtime_use_autosuspend(pfdev->dev);
 592
 593         /*
 594          * Register the DRM device with the core and the connectors with
 595          * sysfs
 596          */
 597         err = drm_dev_register(ddev, 0);
 598         if (err < 0)
 599                 goto err_out1;
 600
 601         panfrost_gem_shrinker_init(ddev);
 602
 603         return 0;
 604
 605 err_out1:
 606         pm_runtime_disable(pfdev->dev);
 607         panfrost_device_fini(pfdev);
 608         pm_runtime_set_suspended(pfdev->dev);
 609 err_out0:
 610         drm_dev_put(ddev);
 611         return err;
 612 }
 613
 614 static int panfrost_remove(struct platform_device *pdev)
 615 {
 616         struct panfrost_device *pfdev = platform_get_drvdata(pdev);
 617         struct drm_device *ddev = pfdev->ddev;
 618
 619         drm_dev_unregister(ddev);
 620         panfrost_gem_shrinker_cleanup(ddev);
 621
 622         pm_runtime_get_sync(pfdev->dev);
 623         pm_runtime_disable(pfdev->dev);
 624         panfrost_device_fini(pfdev);
 625         pm_runtime_set_suspended(pfdev->dev);
 626
 627         drm_dev_put(ddev);
 628         return 0;
 629 }
 630
 631 /*
 632  * The OPP core wants the supply names to be NULL terminated, but we need the
 633  * correct num_supplies value for regulator core. Hence, we NULL terminate here
 634  * and then initialize num_supplies with ARRAY_SIZE - 1.
 635  */
 636 static const char * const default_supplies[] = { "mali", NULL };
 637 static const struct panfrost_compatible default_data = {
 638         .num_supplies = ARRAY_SIZE(default_supplies) - 1,
 639         .supply_names = default_supplies,
 640         .num_pm_domains = 1, /* optional */
 641         .pm_domain_names = NULL,
 642 };
 643
 644 static const struct panfrost_compatible amlogic_data = {
 645         .num_supplies = ARRAY_SIZE(default_supplies) - 1,
 646         .supply_names = default_supplies,
 647         .vendor_quirk = panfrost_gpu_amlogic_quirk,
 648 };
 649
 650 /*
 651  * The old data with two power supplies for MT8183 is here only to
 652  * keep retro-compatibility with older devicetrees, as DVFS will
 653  * not work with this one.
 654  *
 655  * On new devicetrees please use the _b variant with a single and
 656  * coupled regulators instead.
 657  */
 658 static const char * const mediatek_mt8183_supplies[] = { "mali", "sram", NULL };
 659 static const char * const mediatek_mt8183_pm_domains[] = { "core0", "core1", "core2" };
 660 static const struct panfrost_compatible mediatek_mt8183_data = {
 661         .num_supplies = ARRAY_SIZE(mediatek_mt8183_supplies) - 1,
 662         .supply_names = mediatek_mt8183_supplies,
 663         .num_pm_domains = ARRAY_SIZE(mediatek_mt8183_pm_domains),
 664         .pm_domain_names = mediatek_mt8183_pm_domains,
 665 };
 666
 667 static const char * const mediatek_mt8183_b_supplies[] = { "mali", NULL };
 668 static const struct panfrost_compatible mediatek_mt8183_b_data = {
 669         .num_supplies = ARRAY_SIZE(mediatek_mt8183_b_supplies) - 1,
 670         .supply_names = mediatek_mt8183_b_supplies,
 671         .num_pm_domains = ARRAY_SIZE(mediatek_mt8183_pm_domains),
 672         .pm_domain_names = mediatek_mt8183_pm_domains,
 673 };
 674
 675 static const char * const mediatek_mt8186_pm_domains[] = { "core0", "core1" };
 676 static const struct panfrost_compatible mediatek_mt8186_data = {
 677         .num_supplies = ARRAY_SIZE(mediatek_mt8183_b_supplies) - 1,
 678         .supply_names = mediatek_mt8183_b_supplies,
 679         .num_pm_domains = ARRAY_SIZE(mediatek_mt8186_pm_domains),
 680         .pm_domain_names = mediatek_mt8186_pm_domains,
 681 };
 682
 683 static const char * const mediatek_mt8192_supplies[] = { "mali", NULL };
 684 static const char * const mediatek_mt8192_pm_domains[] = { "core0", "core1", "core2",
 685                                                            "core3", "core4" };
 686 static const struct panfrost_compatible mediatek_mt8192_data = {
 687         .num_supplies = ARRAY_SIZE(mediatek_mt8192_supplies) - 1,
 688         .supply_names = mediatek_mt8192_supplies,
 689         .num_pm_domains = ARRAY_SIZE(mediatek_mt8192_pm_domains),
 690         .pm_domain_names = mediatek_mt8192_pm_domains,
 691 };
 692
 693 static const struct of_device_id dt_match[] = {
 694         /* Set first to probe before the generic compatibles */
 695         { .compatible = "amlogic,meson-gxm-mali",
 696           .data = &amlogic_data, },
 697         { .compatible = "amlogic,meson-g12a-mali",
 698           .data = &amlogic_data, },
 699         { .compatible = "arm,mali-t604", .data = &default_data, },
 700         { .compatible = "arm,mali-t624", .data = &default_data, },
 701         { .compatible = "arm,mali-t628", .data = &default_data, },
 702         { .compatible = "arm,mali-t720", .data = &default_data, },
 703         { .compatible = "arm,mali-t760", .data = &default_data, },
 704         { .compatible = "arm,mali-t820", .data = &default_data, },
 705         { .compatible = "arm,mali-t830", .data = &default_data, },
 706         { .compatible = "arm,mali-t860", .data = &default_data, },
 707         { .compatible = "arm,mali-t880", .data = &default_data, },
 708         { .compatible = "arm,mali-bifrost", .data = &default_data, },
 709         { .compatible = "arm,mali-valhall-jm", .data = &default_data, },
 710         { .compatible = "mediatek,mt8183-mali", .data = &mediatek_mt8183_data },
 711         { .compatible = "mediatek,mt8183b-mali", .data = &mediatek_mt8183_b_data },
 712         { .compatible = "mediatek,mt8186-mali", .data = &mediatek_mt8186_data },
 713         { .compatible = "mediatek,mt8192-mali", .data = &mediatek_mt8192_data },
 714         {}
 715 };
 716 MODULE_DEVICE_TABLE(of, dt_match);
 717
 718 static struct platform_driver panfrost_driver = {
 719         .probe          = panfrost_probe,
 720         .remove         = panfrost_remove,
 721         .driver         = {
 722                 .name   = "panfrost",
 723                 .pm     = pm_ptr(&panfrost_pm_ops),
 724                 .of_match_table = dt_match,
 725         },
 726 };
 727 module_platform_driver(panfrost_driver);
 728
 729 MODULE_AUTHOR("Panfrost Project Developers");
 730 MODULE_DESCRIPTION("Panfrost DRM Driver");
 731 MODULE_LICENSE("GPL v2");