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
  86         if (!args->size || args->pad ||
  87             (args->flags & ~(PANFROST_BO_NOEXEC | PANFROST_BO_HEAP)))
  88                 return -EINVAL;
  89
  90         /* Heaps should never be executable */
  91         if ((args->flags & PANFROST_BO_HEAP) &&
  92             !(args->flags & PANFROST_BO_NOEXEC))
  93                 return -EINVAL;
  94
  95         bo = panfrost_gem_create_with_handle(file, dev, args->size, args->flags,
  96                                              &args->handle);
  97         if (IS_ERR(bo))
  98                 return PTR_ERR(bo);
  99
 100         mapping = panfrost_gem_mapping_get(bo, priv);
 101         if (!mapping) {
 102                 drm_gem_object_put(&bo->base.base);
 103                 return -EINVAL;
 104         }
 105
 106         args->offset = mapping->mmnode.start << PAGE_SHIFT;
 107         panfrost_gem_mapping_put(mapping);
 108
 109         return 0;
 110 }
 111
 112 /**
 113  * panfrost_lookup_bos() - Sets up job->bo[] with the GEM objects
 114  * referenced by the job.
 115  * @dev: DRM device
 116  * @file_priv: DRM file for this fd
 117  * @args: IOCTL args
 118  * @job: job being set up
 119  *
 120  * Resolve handles from userspace to BOs and attach them to job.
 121  *
 122  * Note that this function doesn't need to unreference the BOs on
 123  * failure, because that will happen at panfrost_job_cleanup() time.
 124  */
 125 static int
 126 panfrost_lookup_bos(struct drm_device *dev,
 127                   struct drm_file *file_priv,
 128                   struct drm_panfrost_submit *args,
 129                   struct panfrost_job *job)
 130 {
 131         struct panfrost_file_priv *priv = file_priv->driver_priv;
 132         struct panfrost_gem_object *bo;
 133         unsigned int i;
 134         int ret;
 135
 136         job->bo_count = args->bo_handle_count;
 137
 138         if (!job->bo_count)
 139                 return 0;
 140
 141         job->implicit_fences = kvmalloc_array(job->bo_count,
 142                                   sizeof(struct dma_fence *),
 143                                   GFP_KERNEL | __GFP_ZERO);
 144         if (!job->implicit_fences)
 145                 return -ENOMEM;
 146
 147         ret = drm_gem_objects_lookup(file_priv,
 148                                      (void __user *)(uintptr_t)args->bo_handles,
 149                                      job->bo_count, &job->bos);
 150         if (ret)
 151                 return ret;
 152
 153         job->mappings = kvmalloc_array(job->bo_count,
 154                                        sizeof(struct panfrost_gem_mapping *),
 155                                        GFP_KERNEL | __GFP_ZERO);
 156         if (!job->mappings)
 157                 return -ENOMEM;
 158
 159         for (i = 0; i < job->bo_count; i++) {
 160                 struct panfrost_gem_mapping *mapping;
 161
 162                 bo = to_panfrost_bo(job->bos[i]);
 163                 mapping = panfrost_gem_mapping_get(bo, priv);
 164                 if (!mapping) {
 165                         ret = -EINVAL;
 166                         break;
 167                 }
 168
 169                 atomic_inc(&bo->gpu_usecount);
 170                 job->mappings[i] = mapping;
 171         }
 172
 173         return ret;
 174 }
 175
 176 /**
 177  * panfrost_copy_in_sync() - Sets up job->in_fences[] with the sync objects
 178  * referenced by the job.
 179  * @dev: DRM device
 180  * @file_priv: DRM file for this fd
 181  * @args: IOCTL args
 182  * @job: job being set up
 183  *
 184  * Resolve syncobjs from userspace to fences and attach them to job.
 185  *
 186  * Note that this function doesn't need to unreference the fences on
 187  * failure, because that will happen at panfrost_job_cleanup() time.
 188  */
 189 static int
 190 panfrost_copy_in_sync(struct drm_device *dev,
 191                   struct drm_file *file_priv,
 192                   struct drm_panfrost_submit *args,
 193                   struct panfrost_job *job)
 194 {
 195         u32 *handles;
 196         int ret = 0;
 197         int i;
 198
 199         job->in_fence_count = args->in_sync_count;
 200
 201         if (!job->in_fence_count)
 202                 return 0;
 203
 204         job->in_fences = kvmalloc_array(job->in_fence_count,
 205                                         sizeof(struct dma_fence *),
 206                                         GFP_KERNEL | __GFP_ZERO);
 207         if (!job->in_fences) {
 208                 DRM_DEBUG("Failed to allocate job in fences\n");
 209                 return -ENOMEM;
 210         }
 211
 212         handles = kvmalloc_array(job->in_fence_count, sizeof(u32), GFP_KERNEL);
 213         if (!handles) {
 214                 ret = -ENOMEM;
 215                 DRM_DEBUG("Failed to allocate incoming syncobj handles\n");
 216                 goto fail;
 217         }
 218
 219         if (copy_from_user(handles,
 220                            (void __user *)(uintptr_t)args->in_syncs,
 221                            job->in_fence_count * sizeof(u32))) {
 222                 ret = -EFAULT;
 223                 DRM_DEBUG("Failed to copy in syncobj handles\n");
 224                 goto fail;
 225         }
 226
 227         for (i = 0; i < job->in_fence_count; i++) {
 228                 ret = drm_syncobj_find_fence(file_priv, handles[i], 0, 0,
 229                                              &job->in_fences[i]);
 230                 if (ret == -EINVAL)
 231                         goto fail;
 232         }
 233
 234 fail:
 235         kvfree(handles);
 236         return ret;
 237 }
 238
 239 static int panfrost_ioctl_submit(struct drm_device *dev, void *data,
 240                 struct drm_file *file)
 241 {
 242         struct panfrost_device *pfdev = dev->dev_private;
 243         struct drm_panfrost_submit *args = data;
 244         struct drm_syncobj *sync_out = NULL;
 245         struct panfrost_job *job;
 246         int ret = 0;
 247
 248         if (!args->jc)
 249                 return -EINVAL;
 250
 251         if (args->requirements && args->requirements != PANFROST_JD_REQ_FS)
 252                 return -EINVAL;
 253
 254         if (args->out_sync > 0) {
 255                 sync_out = drm_syncobj_find(file, args->out_sync);
 256                 if (!sync_out)
 257                         return -ENODEV;
 258         }
 259
 260         job = kzalloc(sizeof(*job), GFP_KERNEL);
 261         if (!job) {
 262                 ret = -ENOMEM;
 263                 goto fail_out_sync;
 264         }
 265
 266         kref_init(&job->refcount);
 267
 268         job->pfdev = pfdev;
 269         job->jc = args->jc;
 270         job->requirements = args->requirements;
 271         job->flush_id = panfrost_gpu_get_latest_flush_id(pfdev);
 272         job->file_priv = file->driver_priv;
 273
 274         ret = panfrost_copy_in_sync(dev, file, args, job);
 275         if (ret)
 276                 goto fail_job;
 277
 278         ret = panfrost_lookup_bos(dev, file, args, job);
 279         if (ret)
 280                 goto fail_job;
 281
 282         ret = panfrost_job_push(job);
 283         if (ret)
 284                 goto fail_job;
 285
 286         /* Update the return sync object for the job */
 287         if (sync_out)
 288                 drm_syncobj_replace_fence(sync_out, job->render_done_fence);
 289
 290 fail_job:
 291         panfrost_job_put(job);
 292 fail_out_sync:
 293         if (sync_out)
 294                 drm_syncobj_put(sync_out);
 295
 296         return ret;
 297 }
 298
 299 static int
 300 panfrost_ioctl_wait_bo(struct drm_device *dev, void *data,
 301                        struct drm_file *file_priv)
 302 {
 303         long ret;
 304         struct drm_panfrost_wait_bo *args = data;
 305         struct drm_gem_object *gem_obj;
 306         unsigned long timeout = drm_timeout_abs_to_jiffies(args->timeout_ns);
 307
 308         if (args->pad)
 309                 return -EINVAL;
 310
 311         gem_obj = drm_gem_object_lookup(file_priv, args->handle);
 312         if (!gem_obj)
 313                 return -ENOENT;
 314
 315         ret = dma_resv_wait_timeout(gem_obj->resv, true, true, timeout);
 316         if (!ret)
 317                 ret = timeout ? -ETIMEDOUT : -EBUSY;
 318
 319         drm_gem_object_put(gem_obj);
 320
 321         return ret;
 322 }
 323
 324 static int panfrost_ioctl_mmap_bo(struct drm_device *dev, void *data,
 325                       struct drm_file *file_priv)
 326 {
 327         struct drm_panfrost_mmap_bo *args = data;
 328         struct drm_gem_object *gem_obj;
 329         int ret;
 330
 331         if (args->flags != 0) {
 332                 DRM_INFO("unknown mmap_bo flags: %d\n", args->flags);
 333                 return -EINVAL;
 334         }
 335
 336         gem_obj = drm_gem_object_lookup(file_priv, args->handle);
 337         if (!gem_obj) {
 338                 DRM_DEBUG("Failed to look up GEM BO %d\n", args->handle);
 339                 return -ENOENT;
 340         }
 341
 342         /* Don't allow mmapping of heap objects as pages are not pinned. */
 343         if (to_panfrost_bo(gem_obj)->is_heap) {
 344                 ret = -EINVAL;
 345                 goto out;
 346         }
 347
 348         ret = drm_gem_create_mmap_offset(gem_obj);
 349         if (ret == 0)
 350                 args->offset = drm_vma_node_offset_addr(&gem_obj->vma_node);
 351
 352 out:
 353         drm_gem_object_put(gem_obj);
 354         return ret;
 355 }
 356
 357 static int panfrost_ioctl_get_bo_offset(struct drm_device *dev, void *data,
 358                             struct drm_file *file_priv)
 359 {
 360         struct panfrost_file_priv *priv = file_priv->driver_priv;
 361         struct drm_panfrost_get_bo_offset *args = data;
 362         struct panfrost_gem_mapping *mapping;
 363         struct drm_gem_object *gem_obj;
 364         struct panfrost_gem_object *bo;
 365
 366         gem_obj = drm_gem_object_lookup(file_priv, args->handle);
 367         if (!gem_obj) {
 368                 DRM_DEBUG("Failed to look up GEM BO %d\n", args->handle);
 369                 return -ENOENT;
 370         }
 371         bo = to_panfrost_bo(gem_obj);
 372
 373         mapping = panfrost_gem_mapping_get(bo, priv);
 374         drm_gem_object_put(gem_obj);
 375
 376         if (!mapping)
 377                 return -EINVAL;
 378
 379         args->offset = mapping->mmnode.start << PAGE_SHIFT;
 380         panfrost_gem_mapping_put(mapping);
 381         return 0;
 382 }
 383
 384 static int panfrost_ioctl_madvise(struct drm_device *dev, void *data,
 385                                   struct drm_file *file_priv)
 386 {
 387         struct panfrost_file_priv *priv = file_priv->driver_priv;
 388         struct drm_panfrost_madvise *args = data;
 389         struct panfrost_device *pfdev = dev->dev_private;
 390         struct drm_gem_object *gem_obj;
 391         struct panfrost_gem_object *bo;
 392         int ret = 0;
 393
 394         gem_obj = drm_gem_object_lookup(file_priv, args->handle);
 395         if (!gem_obj) {
 396                 DRM_DEBUG("Failed to look up GEM BO %d\n", args->handle);
 397                 return -ENOENT;
 398         }
 399
 400         bo = to_panfrost_bo(gem_obj);
 401
 402         mutex_lock(&pfdev->shrinker_lock);
 403         mutex_lock(&bo->mappings.lock);
 404         if (args->madv == PANFROST_MADV_DONTNEED) {
 405                 struct panfrost_gem_mapping *first;
 406
 407                 first = list_first_entry(&bo->mappings.list,
 408                                          struct panfrost_gem_mapping,
 409                                          node);
 410
 411                 /*
 412                  * If we want to mark the BO purgeable, there must be only one
 413                  * user: the caller FD.
 414                  * We could do something smarter and mark the BO purgeable only
 415                  * when all its users have marked it purgeable, but globally
 416                  * visible/shared BOs are likely to never be marked purgeable
 417                  * anyway, so let's not bother.
 418                  */
 419                 if (!list_is_singular(&bo->mappings.list) ||
 420                     WARN_ON_ONCE(first->mmu != &priv->mmu)) {
 421                         ret = -EINVAL;
 422                         goto out_unlock_mappings;
 423                 }
 424         }
 425
 426         args->retained = drm_gem_shmem_madvise(gem_obj, args->madv);
 427
 428         if (args->retained) {
 429                 if (args->madv == PANFROST_MADV_DONTNEED)
 430                         list_add_tail(&bo->base.madv_list,
 431                                       &pfdev->shrinker_list);
 432                 else if (args->madv == PANFROST_MADV_WILLNEED)
 433                         list_del_init(&bo->base.madv_list);
 434         }
 435
 436 out_unlock_mappings:
 437         mutex_unlock(&bo->mappings.lock);
 438         mutex_unlock(&pfdev->shrinker_lock);
 439
 440         drm_gem_object_put(gem_obj);
 441         return ret;
 442 }
 443
 444 int panfrost_unstable_ioctl_check(void)
 445 {
 446         if (!unstable_ioctls)
 447                 return -ENOSYS;
 448
 449         return 0;
 450 }
 451
 452 #define PFN_4G          (SZ_4G >> PAGE_SHIFT)
 453 #define PFN_4G_MASK     (PFN_4G - 1)
 454 #define PFN_16M         (SZ_16M >> PAGE_SHIFT)
 455
 456 static void panfrost_drm_mm_color_adjust(const struct drm_mm_node *node,
 457                                          unsigned long color,
 458                                          u64 *start, u64 *end)
 459 {
 460         /* Executable buffers can't start or end on a 4GB boundary */
 461         if (!(color & PANFROST_BO_NOEXEC)) {
 462                 u64 next_seg;
 463
 464                 if ((*start & PFN_4G_MASK) == 0)
 465                         (*start)++;
 466
 467                 if ((*end & PFN_4G_MASK) == 0)
 468                         (*end)--;
 469
 470                 next_seg = ALIGN(*start, PFN_4G);
 471                 if (next_seg - *start <= PFN_16M)
 472                         *start = next_seg + 1;
 473
 474                 *end = min(*end, ALIGN(*start, PFN_4G) - 1);
 475         }
 476 }
 477
 478 static int
 479 panfrost_open(struct drm_device *dev, struct drm_file *file)
 480 {
 481         int ret;
 482         struct panfrost_device *pfdev = dev->dev_private;
 483         struct panfrost_file_priv *panfrost_priv;
 484
 485         panfrost_priv = kzalloc(sizeof(*panfrost_priv), GFP_KERNEL);
 486         if (!panfrost_priv)
 487                 return -ENOMEM;
 488
 489         panfrost_priv->pfdev = pfdev;
 490         file->driver_priv = panfrost_priv;
 491
 492         spin_lock_init(&panfrost_priv->mm_lock);
 493
 494         /* 4G enough for now. can be 48-bit */
 495         drm_mm_init(&panfrost_priv->mm, SZ_32M >> PAGE_SHIFT, (SZ_4G - SZ_32M) >> PAGE_SHIFT);
 496         panfrost_priv->mm.color_adjust = panfrost_drm_mm_color_adjust;
 497
 498         ret = panfrost_mmu_pgtable_alloc(panfrost_priv);
 499         if (ret)
 500                 goto err_pgtable;
 501
 502         ret = panfrost_job_open(panfrost_priv);
 503         if (ret)
 504                 goto err_job;
 505
 506         return 0;
 507
 508 err_job:
 509         panfrost_mmu_pgtable_free(panfrost_priv);
 510 err_pgtable:
 511         drm_mm_takedown(&panfrost_priv->mm);
 512         kfree(panfrost_priv);
 513         return ret;
 514 }
 515
 516 static void
 517 panfrost_postclose(struct drm_device *dev, struct drm_file *file)
 518 {
 519         struct panfrost_file_priv *panfrost_priv = file->driver_priv;
 520
 521         panfrost_perfcnt_close(file);
 522         panfrost_job_close(panfrost_priv);
 523
 524         panfrost_mmu_pgtable_free(panfrost_priv);
 525         drm_mm_takedown(&panfrost_priv->mm);
 526         kfree(panfrost_priv);
 527 }
 528
 529 static const struct drm_ioctl_desc panfrost_drm_driver_ioctls[] = {
 530 #define PANFROST_IOCTL(n, func, flags) \
 531         DRM_IOCTL_DEF_DRV(PANFROST_##n, panfrost_ioctl_##func, flags)
 532
 533         PANFROST_IOCTL(SUBMIT,          submit,         DRM_RENDER_ALLOW),
 534         PANFROST_IOCTL(WAIT_BO,         wait_bo,        DRM_RENDER_ALLOW),
 535         PANFROST_IOCTL(CREATE_BO,       create_bo,      DRM_RENDER_ALLOW),
 536         PANFROST_IOCTL(MMAP_BO,         mmap_bo,        DRM_RENDER_ALLOW),
 537         PANFROST_IOCTL(GET_PARAM,       get_param,      DRM_RENDER_ALLOW),
 538         PANFROST_IOCTL(GET_BO_OFFSET,   get_bo_offset,  DRM_RENDER_ALLOW),
 539         PANFROST_IOCTL(PERFCNT_ENABLE,  perfcnt_enable, DRM_RENDER_ALLOW),
 540         PANFROST_IOCTL(PERFCNT_DUMP,    perfcnt_dump,   DRM_RENDER_ALLOW),
 541         PANFROST_IOCTL(MADVISE,         madvise,        DRM_RENDER_ALLOW),
 542 };
 543
 544 DEFINE_DRM_GEM_FOPS(panfrost_drm_driver_fops);
 545
 546 /*
 547  * Panfrost driver version:
 548  * - 1.0 - initial interface
 549  * - 1.1 - adds HEAP and NOEXEC flags for CREATE_BO
 550  * - 1.2 - adds AFBC_FEATURES query
 551  */
 552 static const struct drm_driver panfrost_drm_driver = {
 553         .driver_features        = DRIVER_RENDER | DRIVER_GEM | DRIVER_SYNCOBJ,
 554         .open                   = panfrost_open,
 555         .postclose              = panfrost_postclose,
 556         .ioctls                 = panfrost_drm_driver_ioctls,
 557         .num_ioctls             = ARRAY_SIZE(panfrost_drm_driver_ioctls),
 558         .fops                   = &panfrost_drm_driver_fops,
 559         .name                   = "panfrost",
 560         .desc                   = "panfrost DRM",
 561         .date                   = "20180908",
 562         .major                  = 1,
 563         .minor                  = 2,
 564
 565         .gem_create_object      = panfrost_gem_create_object,
 566         .prime_handle_to_fd     = drm_gem_prime_handle_to_fd,
 567         .prime_fd_to_handle     = drm_gem_prime_fd_to_handle,
 568         .gem_prime_import_sg_table = panfrost_gem_prime_import_sg_table,
 569         .gem_prime_mmap         = drm_gem_prime_mmap,
 570 };
 571
 572 static int panfrost_probe(struct platform_device *pdev)
 573 {
 574         struct panfrost_device *pfdev;
 575         struct drm_device *ddev;
 576         int err;
 577
 578         pfdev = devm_kzalloc(&pdev->dev, sizeof(*pfdev), GFP_KERNEL);
 579         if (!pfdev)
 580                 return -ENOMEM;
 581
 582         pfdev->pdev = pdev;
 583         pfdev->dev = &pdev->dev;
 584
 585         platform_set_drvdata(pdev, pfdev);
 586
 587         pfdev->comp = of_device_get_match_data(&pdev->dev);
 588         if (!pfdev->comp)
 589                 return -ENODEV;
 590
 591         pfdev->coherent = device_get_dma_attr(&pdev->dev) == DEV_DMA_COHERENT;
 592
 593         /* Allocate and initialze the DRM device. */
 594         ddev = drm_dev_alloc(&panfrost_drm_driver, &pdev->dev);
 595         if (IS_ERR(ddev))
 596                 return PTR_ERR(ddev);
 597
 598         ddev->dev_private = pfdev;
 599         pfdev->ddev = ddev;
 600
 601         mutex_init(&pfdev->shrinker_lock);
 602         INIT_LIST_HEAD(&pfdev->shrinker_list);
 603
 604         err = panfrost_device_init(pfdev);
 605         if (err) {
 606                 if (err != -EPROBE_DEFER)
 607                         dev_err(&pdev->dev, "Fatal error during GPU init\n");
 608                 goto err_out0;
 609         }
 610
 611         pm_runtime_set_active(pfdev->dev);
 612         pm_runtime_mark_last_busy(pfdev->dev);
 613         pm_runtime_enable(pfdev->dev);
 614         pm_runtime_set_autosuspend_delay(pfdev->dev, 50); /* ~3 frames */
 615         pm_runtime_use_autosuspend(pfdev->dev);
 616
 617         /*
 618          * Register the DRM device with the core and the connectors with
 619          * sysfs
 620          */
 621         err = drm_dev_register(ddev, 0);
 622         if (err < 0)
 623                 goto err_out1;
 624
 625         panfrost_gem_shrinker_init(ddev);
 626
 627         return 0;
 628
 629 err_out1:
 630         pm_runtime_disable(pfdev->dev);
 631         panfrost_device_fini(pfdev);
 632         pm_runtime_set_suspended(pfdev->dev);
 633 err_out0:
 634         drm_dev_put(ddev);
 635         return err;
 636 }
 637
 638 static int panfrost_remove(struct platform_device *pdev)
 639 {
 640         struct panfrost_device *pfdev = platform_get_drvdata(pdev);
 641         struct drm_device *ddev = pfdev->ddev;
 642
 643         drm_dev_unregister(ddev);
 644         panfrost_gem_shrinker_cleanup(ddev);
 645
 646         pm_runtime_get_sync(pfdev->dev);
 647         pm_runtime_disable(pfdev->dev);
 648         panfrost_device_fini(pfdev);
 649         pm_runtime_set_suspended(pfdev->dev);
 650
 651         drm_dev_put(ddev);
 652         return 0;
 653 }
 654
 655 static const char * const default_supplies[] = { "mali" };
 656 static const struct panfrost_compatible default_data = {
 657         .num_supplies = ARRAY_SIZE(default_supplies),
 658         .supply_names = default_supplies,
 659         .num_pm_domains = 1, /* optional */
 660         .pm_domain_names = NULL,
 661 };
 662
 663 static const struct panfrost_compatible amlogic_data = {
 664         .num_supplies = ARRAY_SIZE(default_supplies),
 665         .supply_names = default_supplies,
 666         .vendor_quirk = panfrost_gpu_amlogic_quirk,
 667 };
 668
 669 const char * const mediatek_mt8183_supplies[] = { "mali", "sram" };
 670 const char * const mediatek_mt8183_pm_domains[] = { "core0", "core1", "core2" };
 671 static const struct panfrost_compatible mediatek_mt8183_data = {
 672         .num_supplies = ARRAY_SIZE(mediatek_mt8183_supplies),
 673         .supply_names = mediatek_mt8183_supplies,
 674         .num_pm_domains = ARRAY_SIZE(mediatek_mt8183_pm_domains),
 675         .pm_domain_names = mediatek_mt8183_pm_domains,
 676 };
 677
 678 static const struct of_device_id dt_match[] = {
 679         /* Set first to probe before the generic compatibles */
 680         { .compatible = "amlogic,meson-gxm-mali",
 681           .data = &amlogic_data, },
 682         { .compatible = "amlogic,meson-g12a-mali",
 683           .data = &amlogic_data, },
 684         { .compatible = "arm,mali-t604", .data = &default_data, },
 685         { .compatible = "arm,mali-t624", .data = &default_data, },
 686         { .compatible = "arm,mali-t628", .data = &default_data, },
 687         { .compatible = "arm,mali-t720", .data = &default_data, },
 688         { .compatible = "arm,mali-t760", .data = &default_data, },
 689         { .compatible = "arm,mali-t820", .data = &default_data, },
 690         { .compatible = "arm,mali-t830", .data = &default_data, },
 691         { .compatible = "arm,mali-t860", .data = &default_data, },
 692         { .compatible = "arm,mali-t880", .data = &default_data, },
 693         { .compatible = "arm,mali-bifrost", .data = &default_data, },
 694         { .compatible = "mediatek,mt8183-mali", .data = &mediatek_mt8183_data },
 695         {}
 696 };
 697 MODULE_DEVICE_TABLE(of, dt_match);
 698
 699 static const struct dev_pm_ops panfrost_pm_ops = {
 700         SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend, pm_runtime_force_resume)
 701         SET_RUNTIME_PM_OPS(panfrost_device_suspend, panfrost_device_resume, NULL)
 702 };
 703
 704 static struct platform_driver panfrost_driver = {
 705         .probe          = panfrost_probe,
 706         .remove         = panfrost_remove,
 707         .driver         = {
 708                 .name   = "panfrost",
 709                 .pm     = &panfrost_pm_ops,
 710                 .of_match_table = dt_match,
 711         },
 712 };
 713 module_platform_driver(panfrost_driver);
 714
 715 MODULE_AUTHOR("Panfrost Project Developers");
 716 MODULE_DESCRIPTION("Panfrost DRM Driver");
 717 MODULE_LICENSE("GPL v2");