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_gem_object *bo;
  82         struct drm_panfrost_create_bo *args = data;
  83
  84         if (!args->size || args->pad ||
  85             (args->flags & ~(PANFROST_BO_NOEXEC | PANFROST_BO_HEAP)))
  86                 return -EINVAL;
  87
  88         /* Heaps should never be executable */
  89         if ((args->flags & PANFROST_BO_HEAP) &&
  90             !(args->flags & PANFROST_BO_NOEXEC))
  91                 return -EINVAL;
  92
  93         bo = panfrost_gem_create_with_handle(file, dev, args->size, args->flags,
  94                                              &args->handle);
  95         if (IS_ERR(bo))
  96                 return PTR_ERR(bo);
  97
  98         args->offset = bo->node.start << PAGE_SHIFT;
  99
 100         return 0;
 101 }
 102
 103 /**
 104  * panfrost_lookup_bos() - Sets up job->bo[] with the GEM objects
 105  * referenced by the job.
 106  * @dev: DRM device
 107  * @file_priv: DRM file for this fd
 108  * @args: IOCTL args
 109  * @job: job being set up
 110  *
 111  * Resolve handles from userspace to BOs and attach them to job.
 112  *
 113  * Note that this function doesn't need to unreference the BOs on
 114  * failure, because that will happen at panfrost_job_cleanup() time.
 115  */
 116 static int
 117 panfrost_lookup_bos(struct drm_device *dev,
 118                   struct drm_file *file_priv,
 119                   struct drm_panfrost_submit *args,
 120                   struct panfrost_job *job)
 121 {
 122         job->bo_count = args->bo_handle_count;
 123
 124         if (!job->bo_count)
 125                 return 0;
 126
 127         job->implicit_fences = kvmalloc_array(job->bo_count,
 128                                   sizeof(struct dma_fence *),
 129                                   GFP_KERNEL | __GFP_ZERO);
 130         if (!job->implicit_fences)
 131                 return -ENOMEM;
 132
 133         return drm_gem_objects_lookup(file_priv,
 134                                       (void __user *)(uintptr_t)args->bo_handles,
 135                                       job->bo_count, &job->bos);
 136 }
 137
 138 /**
 139  * panfrost_copy_in_sync() - Sets up job->in_fences[] with the sync objects
 140  * referenced by the job.
 141  * @dev: DRM device
 142  * @file_priv: DRM file for this fd
 143  * @args: IOCTL args
 144  * @job: job being set up
 145  *
 146  * Resolve syncobjs from userspace to fences and attach them to job.
 147  *
 148  * Note that this function doesn't need to unreference the fences on
 149  * failure, because that will happen at panfrost_job_cleanup() time.
 150  */
 151 static int
 152 panfrost_copy_in_sync(struct drm_device *dev,
 153                   struct drm_file *file_priv,
 154                   struct drm_panfrost_submit *args,
 155                   struct panfrost_job *job)
 156 {
 157         u32 *handles;
 158         int ret = 0;
 159         int i;
 160
 161         job->in_fence_count = args->in_sync_count;
 162
 163         if (!job->in_fence_count)
 164                 return 0;
 165
 166         job->in_fences = kvmalloc_array(job->in_fence_count,
 167                                         sizeof(struct dma_fence *),
 168                                         GFP_KERNEL | __GFP_ZERO);
 169         if (!job->in_fences) {
 170                 DRM_DEBUG("Failed to allocate job in fences\n");
 171                 return -ENOMEM;
 172         }
 173
 174         handles = kvmalloc_array(job->in_fence_count, sizeof(u32), GFP_KERNEL);
 175         if (!handles) {
 176                 ret = -ENOMEM;
 177                 DRM_DEBUG("Failed to allocate incoming syncobj handles\n");
 178                 goto fail;
 179         }
 180
 181         if (copy_from_user(handles,
 182                            (void __user *)(uintptr_t)args->in_syncs,
 183                            job->in_fence_count * sizeof(u32))) {
 184                 ret = -EFAULT;
 185                 DRM_DEBUG("Failed to copy in syncobj handles\n");
 186                 goto fail;
 187         }
 188
 189         for (i = 0; i < job->in_fence_count; i++) {
 190                 ret = drm_syncobj_find_fence(file_priv, handles[i], 0, 0,
 191                                              &job->in_fences[i]);
 192                 if (ret == -EINVAL)
 193                         goto fail;
 194         }
 195
 196 fail:
 197         kvfree(handles);
 198         return ret;
 199 }
 200
 201 static int panfrost_ioctl_submit(struct drm_device *dev, void *data,
 202                 struct drm_file *file)
 203 {
 204         struct panfrost_device *pfdev = dev->dev_private;
 205         struct drm_panfrost_submit *args = data;
 206         struct drm_syncobj *sync_out = NULL;
 207         struct panfrost_job *job;
 208         int ret = 0;
 209
 210         if (!args->jc)
 211                 return -EINVAL;
 212
 213         if (args->requirements && args->requirements != PANFROST_JD_REQ_FS)
 214                 return -EINVAL;
 215
 216         if (args->out_sync > 0) {
 217                 sync_out = drm_syncobj_find(file, args->out_sync);
 218                 if (!sync_out)
 219                         return -ENODEV;
 220         }
 221
 222         job = kzalloc(sizeof(*job), GFP_KERNEL);
 223         if (!job) {
 224                 ret = -ENOMEM;
 225                 goto fail_out_sync;
 226         }
 227
 228         kref_init(&job->refcount);
 229
 230         job->pfdev = pfdev;
 231         job->jc = args->jc;
 232         job->requirements = args->requirements;
 233         job->flush_id = panfrost_gpu_get_latest_flush_id(pfdev);
 234         job->file_priv = file->driver_priv;
 235
 236         ret = panfrost_copy_in_sync(dev, file, args, job);
 237         if (ret)
 238                 goto fail_job;
 239
 240         ret = panfrost_lookup_bos(dev, file, args, job);
 241         if (ret)
 242                 goto fail_job;
 243
 244         ret = panfrost_job_push(job);
 245         if (ret)
 246                 goto fail_job;
 247
 248         /* Update the return sync object for the job */
 249         if (sync_out)
 250                 drm_syncobj_replace_fence(sync_out, job->render_done_fence);
 251
 252 fail_job:
 253         panfrost_job_put(job);
 254 fail_out_sync:
 255         if (sync_out)
 256                 drm_syncobj_put(sync_out);
 257
 258         return ret;
 259 }
 260
 261 static int
 262 panfrost_ioctl_wait_bo(struct drm_device *dev, void *data,
 263                        struct drm_file *file_priv)
 264 {
 265         long ret;
 266         struct drm_panfrost_wait_bo *args = data;
 267         struct drm_gem_object *gem_obj;
 268         unsigned long timeout = drm_timeout_abs_to_jiffies(args->timeout_ns);
 269
 270         if (args->pad)
 271                 return -EINVAL;
 272
 273         gem_obj = drm_gem_object_lookup(file_priv, args->handle);
 274         if (!gem_obj)
 275                 return -ENOENT;
 276
 277         ret = dma_resv_wait_timeout_rcu(gem_obj->resv, true,
 278                                                   true, timeout);
 279         if (!ret)
 280                 ret = timeout ? -ETIMEDOUT : -EBUSY;
 281
 282         drm_gem_object_put_unlocked(gem_obj);
 283
 284         return ret;
 285 }
 286
 287 static int panfrost_ioctl_mmap_bo(struct drm_device *dev, void *data,
 288                       struct drm_file *file_priv)
 289 {
 290         struct drm_panfrost_mmap_bo *args = data;
 291         struct drm_gem_object *gem_obj;
 292         int ret;
 293
 294         if (args->flags != 0) {
 295                 DRM_INFO("unknown mmap_bo flags: %d\n", args->flags);
 296                 return -EINVAL;
 297         }
 298
 299         gem_obj = drm_gem_object_lookup(file_priv, args->handle);
 300         if (!gem_obj) {
 301                 DRM_DEBUG("Failed to look up GEM BO %d\n", args->handle);
 302                 return -ENOENT;
 303         }
 304
 305         /* Don't allow mmapping of heap objects as pages are not pinned. */
 306         if (to_panfrost_bo(gem_obj)->is_heap)
 307                 return -EINVAL;
 308
 309         ret = drm_gem_create_mmap_offset(gem_obj);
 310         if (ret == 0)
 311                 args->offset = drm_vma_node_offset_addr(&gem_obj->vma_node);
 312         drm_gem_object_put_unlocked(gem_obj);
 313
 314         return ret;
 315 }
 316
 317 static int panfrost_ioctl_get_bo_offset(struct drm_device *dev, void *data,
 318                             struct drm_file *file_priv)
 319 {
 320         struct drm_panfrost_get_bo_offset *args = data;
 321         struct drm_gem_object *gem_obj;
 322         struct panfrost_gem_object *bo;
 323
 324         gem_obj = drm_gem_object_lookup(file_priv, args->handle);
 325         if (!gem_obj) {
 326                 DRM_DEBUG("Failed to look up GEM BO %d\n", args->handle);
 327                 return -ENOENT;
 328         }
 329         bo = to_panfrost_bo(gem_obj);
 330
 331         args->offset = bo->node.start << PAGE_SHIFT;
 332
 333         drm_gem_object_put_unlocked(gem_obj);
 334         return 0;
 335 }
 336
 337 static int panfrost_ioctl_madvise(struct drm_device *dev, void *data,
 338                                   struct drm_file *file_priv)
 339 {
 340         struct drm_panfrost_madvise *args = data;
 341         struct panfrost_device *pfdev = dev->dev_private;
 342         struct drm_gem_object *gem_obj;
 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         args->retained = drm_gem_shmem_madvise(gem_obj, args->madv);
 351
 352         if (args->retained) {
 353                 struct panfrost_gem_object *bo = to_panfrost_bo(gem_obj);
 354
 355                 mutex_lock(&pfdev->shrinker_lock);
 356
 357                 if (args->madv == PANFROST_MADV_DONTNEED)
 358                         list_add_tail(&bo->base.madv_list, &pfdev->shrinker_list);
 359                 else if (args->madv == PANFROST_MADV_WILLNEED)
 360                         list_del_init(&bo->base.madv_list);
 361
 362                 mutex_unlock(&pfdev->shrinker_lock);
 363         }
 364
 365         drm_gem_object_put_unlocked(gem_obj);
 366         return 0;
 367 }
 368
 369 int panfrost_unstable_ioctl_check(void)
 370 {
 371         if (!unstable_ioctls)
 372                 return -ENOSYS;
 373
 374         return 0;
 375 }
 376
 377 #define PFN_4G          (SZ_4G >> PAGE_SHIFT)
 378 #define PFN_4G_MASK     (PFN_4G - 1)
 379 #define PFN_16M         (SZ_16M >> PAGE_SHIFT)
 380
 381 static void panfrost_drm_mm_color_adjust(const struct drm_mm_node *node,
 382                                          unsigned long color,
 383                                          u64 *start, u64 *end)
 384 {
 385         /* Executable buffers can't start or end on a 4GB boundary */
 386         if (!(color & PANFROST_BO_NOEXEC)) {
 387                 u64 next_seg;
 388
 389                 if ((*start & PFN_4G_MASK) == 0)
 390                         (*start)++;
 391
 392                 if ((*end & PFN_4G_MASK) == 0)
 393                         (*end)--;
 394
 395                 next_seg = ALIGN(*start, PFN_4G);
 396                 if (next_seg - *start <= PFN_16M)
 397                         *start = next_seg + 1;
 398
 399                 *end = min(*end, ALIGN(*start, PFN_4G) - 1);
 400         }
 401 }
 402
 403 static int
 404 panfrost_open(struct drm_device *dev, struct drm_file *file)
 405 {
 406         int ret;
 407         struct panfrost_device *pfdev = dev->dev_private;
 408         struct panfrost_file_priv *panfrost_priv;
 409
 410         panfrost_priv = kzalloc(sizeof(*panfrost_priv), GFP_KERNEL);
 411         if (!panfrost_priv)
 412                 return -ENOMEM;
 413
 414         panfrost_priv->pfdev = pfdev;
 415         file->driver_priv = panfrost_priv;
 416
 417         spin_lock_init(&panfrost_priv->mm_lock);
 418
 419         /* 4G enough for now. can be 48-bit */
 420         drm_mm_init(&panfrost_priv->mm, SZ_32M >> PAGE_SHIFT, (SZ_4G - SZ_32M) >> PAGE_SHIFT);
 421         panfrost_priv->mm.color_adjust = panfrost_drm_mm_color_adjust;
 422
 423         ret = panfrost_mmu_pgtable_alloc(panfrost_priv);
 424         if (ret)
 425                 goto err_pgtable;
 426
 427         ret = panfrost_job_open(panfrost_priv);
 428         if (ret)
 429                 goto err_job;
 430
 431         return 0;
 432
 433 err_job:
 434         panfrost_mmu_pgtable_free(panfrost_priv);
 435 err_pgtable:
 436         drm_mm_takedown(&panfrost_priv->mm);
 437         kfree(panfrost_priv);
 438         return ret;
 439 }
 440
 441 static void
 442 panfrost_postclose(struct drm_device *dev, struct drm_file *file)
 443 {
 444         struct panfrost_file_priv *panfrost_priv = file->driver_priv;
 445
 446         panfrost_perfcnt_close(panfrost_priv);
 447         panfrost_job_close(panfrost_priv);
 448
 449         panfrost_mmu_pgtable_free(panfrost_priv);
 450         drm_mm_takedown(&panfrost_priv->mm);
 451         kfree(panfrost_priv);
 452 }
 453
 454 /* DRM_AUTH is required on SUBMIT for now, while all clients share a single
 455  * address space.  Note that render nodes would be able to submit jobs that
 456  * could access BOs from clients authenticated with the master node.
 457  */
 458 static const struct drm_ioctl_desc panfrost_drm_driver_ioctls[] = {
 459 #define PANFROST_IOCTL(n, func, flags) \
 460         DRM_IOCTL_DEF_DRV(PANFROST_##n, panfrost_ioctl_##func, flags)
 461
 462         PANFROST_IOCTL(SUBMIT,          submit,         DRM_RENDER_ALLOW | DRM_AUTH),
 463         PANFROST_IOCTL(WAIT_BO,         wait_bo,        DRM_RENDER_ALLOW),
 464         PANFROST_IOCTL(CREATE_BO,       create_bo,      DRM_RENDER_ALLOW),
 465         PANFROST_IOCTL(MMAP_BO,         mmap_bo,        DRM_RENDER_ALLOW),
 466         PANFROST_IOCTL(GET_PARAM,       get_param,      DRM_RENDER_ALLOW),
 467         PANFROST_IOCTL(GET_BO_OFFSET,   get_bo_offset,  DRM_RENDER_ALLOW),
 468         PANFROST_IOCTL(PERFCNT_ENABLE,  perfcnt_enable, DRM_RENDER_ALLOW),
 469         PANFROST_IOCTL(PERFCNT_DUMP,    perfcnt_dump,   DRM_RENDER_ALLOW),
 470         PANFROST_IOCTL(MADVISE,         madvise,        DRM_RENDER_ALLOW),
 471 };
 472
 473 DEFINE_DRM_GEM_FOPS(panfrost_drm_driver_fops);
 474
 475 /*
 476  * Panfrost driver version:
 477  * - 1.0 - initial interface
 478  * - 1.1 - adds HEAP and NOEXEC flags for CREATE_BO
 479  */
 480 static struct drm_driver panfrost_drm_driver = {
 481         .driver_features        = DRIVER_RENDER | DRIVER_GEM | DRIVER_SYNCOBJ,
 482         .open                   = panfrost_open,
 483         .postclose              = panfrost_postclose,
 484         .ioctls                 = panfrost_drm_driver_ioctls,
 485         .num_ioctls             = ARRAY_SIZE(panfrost_drm_driver_ioctls),
 486         .fops                   = &panfrost_drm_driver_fops,
 487         .name                   = "panfrost",
 488         .desc                   = "panfrost DRM",
 489         .date                   = "20180908",
 490         .major                  = 1,
 491         .minor                  = 1,
 492
 493         .gem_create_object      = panfrost_gem_create_object,
 494         .prime_handle_to_fd     = drm_gem_prime_handle_to_fd,
 495         .prime_fd_to_handle     = drm_gem_prime_fd_to_handle,
 496         .gem_prime_import_sg_table = panfrost_gem_prime_import_sg_table,
 497         .gem_prime_mmap         = drm_gem_prime_mmap,
 498 };
 499
 500 static int panfrost_probe(struct platform_device *pdev)
 501 {
 502         struct panfrost_device *pfdev;
 503         struct drm_device *ddev;
 504         int err;
 505
 506         pfdev = devm_kzalloc(&pdev->dev, sizeof(*pfdev), GFP_KERNEL);
 507         if (!pfdev)
 508                 return -ENOMEM;
 509
 510         pfdev->pdev = pdev;
 511         pfdev->dev = &pdev->dev;
 512
 513         platform_set_drvdata(pdev, pfdev);
 514
 515         /* Allocate and initialze the DRM device. */
 516         ddev = drm_dev_alloc(&panfrost_drm_driver, &pdev->dev);
 517         if (IS_ERR(ddev))
 518                 return PTR_ERR(ddev);
 519
 520         ddev->dev_private = pfdev;
 521         pfdev->ddev = ddev;
 522
 523         mutex_init(&pfdev->shrinker_lock);
 524         INIT_LIST_HEAD(&pfdev->shrinker_list);
 525
 526         err = panfrost_device_init(pfdev);
 527         if (err) {
 528                 if (err != -EPROBE_DEFER)
 529                         dev_err(&pdev->dev, "Fatal error during GPU init\n");
 530                 goto err_out0;
 531         }
 532
 533         err = panfrost_devfreq_init(pfdev);
 534         if (err) {
 535                 if (err != -EPROBE_DEFER)
 536                         dev_err(&pdev->dev, "Fatal error during devfreq init\n");
 537                 goto err_out1;
 538         }
 539
 540         pm_runtime_set_active(pfdev->dev);
 541         pm_runtime_mark_last_busy(pfdev->dev);
 542         pm_runtime_enable(pfdev->dev);
 543         pm_runtime_set_autosuspend_delay(pfdev->dev, 50); /* ~3 frames */
 544         pm_runtime_use_autosuspend(pfdev->dev);
 545
 546         /*
 547          * Register the DRM device with the core and the connectors with
 548          * sysfs
 549          */
 550         err = drm_dev_register(ddev, 0);
 551         if (err < 0)
 552                 goto err_out2;
 553
 554         panfrost_gem_shrinker_init(ddev);
 555
 556         return 0;
 557
 558 err_out2:
 559         pm_runtime_disable(pfdev->dev);
 560         panfrost_devfreq_fini(pfdev);
 561 err_out1:
 562         panfrost_device_fini(pfdev);
 563 err_out0:
 564         drm_dev_put(ddev);
 565         return err;
 566 }
 567
 568 static int panfrost_remove(struct platform_device *pdev)
 569 {
 570         struct panfrost_device *pfdev = platform_get_drvdata(pdev);
 571         struct drm_device *ddev = pfdev->ddev;
 572
 573         drm_dev_unregister(ddev);
 574         panfrost_gem_shrinker_cleanup(ddev);
 575
 576         pm_runtime_get_sync(pfdev->dev);
 577         panfrost_devfreq_fini(pfdev);
 578         panfrost_device_fini(pfdev);
 579         pm_runtime_put_sync_suspend(pfdev->dev);
 580         pm_runtime_disable(pfdev->dev);
 581
 582         drm_dev_put(ddev);
 583         return 0;
 584 }
 585
 586 static const struct of_device_id dt_match[] = {
 587         { .compatible = "arm,mali-t604" },
 588         { .compatible = "arm,mali-t624" },
 589         { .compatible = "arm,mali-t628" },
 590         { .compatible = "arm,mali-t720" },
 591         { .compatible = "arm,mali-t760" },
 592         { .compatible = "arm,mali-t820" },
 593         { .compatible = "arm,mali-t830" },
 594         { .compatible = "arm,mali-t860" },
 595         { .compatible = "arm,mali-t880" },
 596         {}
 597 };
 598 MODULE_DEVICE_TABLE(of, dt_match);
 599
 600 static const struct dev_pm_ops panfrost_pm_ops = {
 601         SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend, pm_runtime_force_resume)
 602         SET_RUNTIME_PM_OPS(panfrost_device_suspend, panfrost_device_resume, NULL)
 603 };
 604
 605 static struct platform_driver panfrost_driver = {
 606         .probe          = panfrost_probe,
 607         .remove         = panfrost_remove,
 608         .driver         = {
 609                 .name   = "panfrost",
 610                 .pm     = &panfrost_pm_ops,
 611                 .of_match_table = dt_match,
 612         },
 613 };
 614 module_platform_driver(panfrost_driver);
 615
 616 MODULE_AUTHOR("Panfrost Project Developers");
 617 MODULE_DESCRIPTION("Panfrost DRM Driver");
 618 MODULE_LICENSE("GPL v2");