drivers/gpu/drm/panfrost/panfrost_drv.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /* Copyright 2018 Marty E. Plummer <hanetzer@startmail.com> */
   3 /* Copyright 2019 Linaro, Ltd., Rob Herring <robh@kernel.org> */
   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_devfreq.h"
  18 #include "panfrost_gem.h"
  19 #include "panfrost_mmu.h"
  20 #include "panfrost_job.h"
  21 #include "panfrost_gpu.h"
  22 #include "panfrost_perfcnt.h"
  23
  24 static bool unstable_ioctls;
  25 module_param_unsafe(unstable_ioctls, bool, 0600);
  26
  27 static int panfrost_ioctl_get_param(struct drm_device *ddev, void *data, struct drm_file *file)
  28 {
  29         struct drm_panfrost_get_param *param = data;
  30         struct panfrost_device *pfdev = ddev->dev_private;
  31
  32         if (param->pad != 0)
  33                 return -EINVAL;
  34
  35 #define PANFROST_FEATURE(name, member)                  \
  36         case DRM_PANFROST_PARAM_ ## name:               \
  37                 param->value = pfdev->features.member;  \
  38                 break
  39 #define PANFROST_FEATURE_ARRAY(name, member, max)                       \
  40         case DRM_PANFROST_PARAM_ ## name ## 0 ...                       \
  41                 DRM_PANFROST_PARAM_ ## name ## max:                     \
  42                 param->value = pfdev->features.member[param->param -    \
  43                         DRM_PANFROST_PARAM_ ## name ## 0];              \
  44                 break
  45
  46         switch (param->param) {
  47                 PANFROST_FEATURE(GPU_PROD_ID, id);
  48                 PANFROST_FEATURE(GPU_REVISION, revision);
  49                 PANFROST_FEATURE(SHADER_PRESENT, shader_present);
  50                 PANFROST_FEATURE(TILER_PRESENT, tiler_present);
  51                 PANFROST_FEATURE(L2_PRESENT, l2_present);
  52                 PANFROST_FEATURE(STACK_PRESENT, stack_present);
  53                 PANFROST_FEATURE(AS_PRESENT, as_present);
  54                 PANFROST_FEATURE(JS_PRESENT, js_present);
  55                 PANFROST_FEATURE(L2_FEATURES, l2_features);
  56                 PANFROST_FEATURE(CORE_FEATURES, core_features);
  57                 PANFROST_FEATURE(TILER_FEATURES, tiler_features);
  58                 PANFROST_FEATURE(MEM_FEATURES, mem_features);
  59                 PANFROST_FEATURE(MMU_FEATURES, mmu_features);
  60                 PANFROST_FEATURE(THREAD_FEATURES, thread_features);
  61                 PANFROST_FEATURE(MAX_THREADS, max_threads);
  62                 PANFROST_FEATURE(THREAD_MAX_WORKGROUP_SZ,
  63                                 thread_max_workgroup_sz);
  64                 PANFROST_FEATURE(THREAD_MAX_BARRIER_SZ,
  65                                 thread_max_barrier_sz);
  66                 PANFROST_FEATURE(COHERENCY_FEATURES, coherency_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_unlocked(&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                 job->mappings[i] = mapping;
 170         }
 171
 172         return ret;
 173 }
 174
 175 /**
 176  * panfrost_copy_in_sync() - Sets up job->in_fences[] with the sync objects
 177  * referenced by the job.
 178  * @dev: DRM device
 179  * @file_priv: DRM file for this fd
 180  * @args: IOCTL args
 181  * @job: job being set up
 182  *
 183  * Resolve syncobjs from userspace to fences and attach them to job.
 184  *
 185  * Note that this function doesn't need to unreference the fences on
 186  * failure, because that will happen at panfrost_job_cleanup() time.
 187  */
 188 static int
 189 panfrost_copy_in_sync(struct drm_device *dev,
 190                   struct drm_file *file_priv,
 191                   struct drm_panfrost_submit *args,
 192                   struct panfrost_job *job)
 193 {
 194         u32 *handles;
 195         int ret = 0;
 196         int i;
 197
 198         job->in_fence_count = args->in_sync_count;
 199
 200         if (!job->in_fence_count)
 201                 return 0;
 202
 203         job->in_fences = kvmalloc_array(job->in_fence_count,
 204                                         sizeof(struct dma_fence *),
 205                                         GFP_KERNEL | __GFP_ZERO);
 206         if (!job->in_fences) {
 207                 DRM_DEBUG("Failed to allocate job in fences\n");
 208                 return -ENOMEM;
 209         }
 210
 211         handles = kvmalloc_array(job->in_fence_count, sizeof(u32), GFP_KERNEL);
 212         if (!handles) {
 213                 ret = -ENOMEM;
 214                 DRM_DEBUG("Failed to allocate incoming syncobj handles\n");
 215                 goto fail;
 216         }
 217
 218         if (copy_from_user(handles,
 219                            (void __user *)(uintptr_t)args->in_syncs,
 220                            job->in_fence_count * sizeof(u32))) {
 221                 ret = -EFAULT;
 222                 DRM_DEBUG("Failed to copy in syncobj handles\n");
 223                 goto fail;
 224         }
 225
 226         for (i = 0; i < job->in_fence_count; i++) {
 227                 ret = drm_syncobj_find_fence(file_priv, handles[i], 0, 0,
 228                                              &job->in_fences[i]);
 229                 if (ret == -EINVAL)
 230                         goto fail;
 231         }
 232
 233 fail:
 234         kvfree(handles);
 235         return ret;
 236 }
 237
 238 static int panfrost_ioctl_submit(struct drm_device *dev, void *data,
 239                 struct drm_file *file)
 240 {
 241         struct panfrost_device *pfdev = dev->dev_private;
 242         struct drm_panfrost_submit *args = data;
 243         struct drm_syncobj *sync_out = NULL;
 244         struct panfrost_job *job;
 245         int ret = 0;
 246
 247         if (!args->jc)
 248                 return -EINVAL;
 249
 250         if (args->requirements && args->requirements != PANFROST_JD_REQ_FS)
 251                 return -EINVAL;
 252
 253         if (args->out_sync > 0) {
 254                 sync_out = drm_syncobj_find(file, args->out_sync);
 255                 if (!sync_out)
 256                         return -ENODEV;
 257         }
 258
 259         job = kzalloc(sizeof(*job), GFP_KERNEL);
 260         if (!job) {
 261                 ret = -ENOMEM;
 262                 goto fail_out_sync;
 263         }
 264
 265         kref_init(&job->refcount);
 266
 267         job->pfdev = pfdev;
 268         job->jc = args->jc;
 269         job->requirements = args->requirements;
 270         job->flush_id = panfrost_gpu_get_latest_flush_id(pfdev);
 271         job->file_priv = file->driver_priv;
 272
 273         ret = panfrost_copy_in_sync(dev, file, args, job);
 274         if (ret)
 275                 goto fail_job;
 276
 277         ret = panfrost_lookup_bos(dev, file, args, job);
 278         if (ret)
 279                 goto fail_job;
 280
 281         ret = panfrost_job_push(job);
 282         if (ret)
 283                 goto fail_job;
 284
 285         /* Update the return sync object for the job */
 286         if (sync_out)
 287                 drm_syncobj_replace_fence(sync_out, job->render_done_fence);
 288
 289 fail_job:
 290         panfrost_job_put(job);
 291 fail_out_sync:
 292         if (sync_out)
 293                 drm_syncobj_put(sync_out);
 294
 295         return ret;
 296 }
 297
 298 static int
 299 panfrost_ioctl_wait_bo(struct drm_device *dev, void *data,
 300                        struct drm_file *file_priv)
 301 {
 302         long ret;
 303         struct drm_panfrost_wait_bo *args = data;
 304         struct drm_gem_object *gem_obj;
 305         unsigned long timeout = drm_timeout_abs_to_jiffies(args->timeout_ns);
 306
 307         if (args->pad)
 308                 return -EINVAL;
 309
 310         gem_obj = drm_gem_object_lookup(file_priv, args->handle);
 311         if (!gem_obj)
 312                 return -ENOENT;
 313
 314         ret = dma_resv_wait_timeout_rcu(gem_obj->resv, true,
 315                                                   true, timeout);
 316         if (!ret)
 317                 ret = timeout ? -ETIMEDOUT : -EBUSY;
 318
 319         drm_gem_object_put_unlocked(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_unlocked(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_unlocked(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_unlocked(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  */
 551 static struct drm_driver panfrost_drm_driver = {
 552         .driver_features        = DRIVER_RENDER | DRIVER_GEM | DRIVER_SYNCOBJ,
 553         .open                   = panfrost_open,
 554         .postclose              = panfrost_postclose,
 555         .ioctls                 = panfrost_drm_driver_ioctls,
 556         .num_ioctls             = ARRAY_SIZE(panfrost_drm_driver_ioctls),
 557         .fops                   = &panfrost_drm_driver_fops,
 558         .name                   = "panfrost",
 559         .desc                   = "panfrost DRM",
 560         .date                   = "20180908",
 561         .major                  = 1,
 562         .minor                  = 1,
 563
 564         .gem_create_object      = panfrost_gem_create_object,
 565         .prime_handle_to_fd     = drm_gem_prime_handle_to_fd,
 566         .prime_fd_to_handle     = drm_gem_prime_fd_to_handle,
 567         .gem_prime_import_sg_table = panfrost_gem_prime_import_sg_table,
 568         .gem_prime_mmap         = drm_gem_prime_mmap,
 569 };
 570
 571 static int panfrost_probe(struct platform_device *pdev)
 572 {
 573         struct panfrost_device *pfdev;
 574         struct drm_device *ddev;
 575         int err;
 576
 577         pfdev = devm_kzalloc(&pdev->dev, sizeof(*pfdev), GFP_KERNEL);
 578         if (!pfdev)
 579                 return -ENOMEM;
 580
 581         pfdev->pdev = pdev;
 582         pfdev->dev = &pdev->dev;
 583
 584         platform_set_drvdata(pdev, pfdev);
 585
 586         /* Allocate and initialze the DRM device. */
 587         ddev = drm_dev_alloc(&panfrost_drm_driver, &pdev->dev);
 588         if (IS_ERR(ddev))
 589                 return PTR_ERR(ddev);
 590
 591         ddev->dev_private = pfdev;
 592         pfdev->ddev = ddev;
 593
 594         mutex_init(&pfdev->shrinker_lock);
 595         INIT_LIST_HEAD(&pfdev->shrinker_list);
 596
 597         err = panfrost_device_init(pfdev);
 598         if (err) {
 599                 if (err != -EPROBE_DEFER)
 600                         dev_err(&pdev->dev, "Fatal error during GPU init\n");
 601                 goto err_out0;
 602         }
 603
 604         err = panfrost_devfreq_init(pfdev);
 605         if (err) {
 606                 if (err != -EPROBE_DEFER)
 607                         dev_err(&pdev->dev, "Fatal error during devfreq init\n");
 608                 goto err_out1;
 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_out2;
 624
 625         panfrost_gem_shrinker_init(ddev);
 626
 627         return 0;
 628
 629 err_out2:
 630         pm_runtime_disable(pfdev->dev);
 631         panfrost_devfreq_fini(pfdev);
 632 err_out1:
 633         panfrost_device_fini(pfdev);
 634 err_out0:
 635         drm_dev_put(ddev);
 636         return err;
 637 }
 638
 639 static int panfrost_remove(struct platform_device *pdev)
 640 {
 641         struct panfrost_device *pfdev = platform_get_drvdata(pdev);
 642         struct drm_device *ddev = pfdev->ddev;
 643
 644         drm_dev_unregister(ddev);
 645         panfrost_gem_shrinker_cleanup(ddev);
 646
 647         pm_runtime_get_sync(pfdev->dev);
 648         panfrost_devfreq_fini(pfdev);
 649         panfrost_device_fini(pfdev);
 650         pm_runtime_put_sync_suspend(pfdev->dev);
 651         pm_runtime_disable(pfdev->dev);
 652
 653         drm_dev_put(ddev);
 654         return 0;
 655 }
 656
 657 static const struct of_device_id dt_match[] = {
 658         { .compatible = "arm,mali-t604" },
 659         { .compatible = "arm,mali-t624" },
 660         { .compatible = "arm,mali-t628" },
 661         { .compatible = "arm,mali-t720" },
 662         { .compatible = "arm,mali-t760" },
 663         { .compatible = "arm,mali-t820" },
 664         { .compatible = "arm,mali-t830" },
 665         { .compatible = "arm,mali-t860" },
 666         { .compatible = "arm,mali-t880" },
 667         {}
 668 };
 669 MODULE_DEVICE_TABLE(of, dt_match);
 670
 671 static const struct dev_pm_ops panfrost_pm_ops = {
 672         SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend, pm_runtime_force_resume)
 673         SET_RUNTIME_PM_OPS(panfrost_device_suspend, panfrost_device_resume, NULL)
 674 };
 675
 676 static struct platform_driver panfrost_driver = {
 677         .probe          = panfrost_probe,
 678         .remove         = panfrost_remove,
 679         .driver         = {
 680                 .name   = "panfrost",
 681                 .pm     = &panfrost_pm_ops,
 682                 .of_match_table = dt_match,
 683         },
 684 };
 685 module_platform_driver(panfrost_driver);
 686
 687 MODULE_AUTHOR("Panfrost Project Developers");
 688 MODULE_DESCRIPTION("Panfrost DRM Driver");
 689 MODULE_LICENSE("GPL v2");