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                 ret = -EINVAL;
 308                 goto out;
 309         }
 310
 311         ret = drm_gem_create_mmap_offset(gem_obj);
 312         if (ret == 0)
 313                 args->offset = drm_vma_node_offset_addr(&gem_obj->vma_node);
 314
 315 out:
 316         drm_gem_object_put_unlocked(gem_obj);
 317         return ret;
 318 }
 319
 320 static int panfrost_ioctl_get_bo_offset(struct drm_device *dev, void *data,
 321                             struct drm_file *file_priv)
 322 {
 323         struct drm_panfrost_get_bo_offset *args = data;
 324         struct drm_gem_object *gem_obj;
 325         struct panfrost_gem_object *bo;
 326
 327         gem_obj = drm_gem_object_lookup(file_priv, args->handle);
 328         if (!gem_obj) {
 329                 DRM_DEBUG("Failed to look up GEM BO %d\n", args->handle);
 330                 return -ENOENT;
 331         }
 332         bo = to_panfrost_bo(gem_obj);
 333
 334         args->offset = bo->node.start << PAGE_SHIFT;
 335
 336         drm_gem_object_put_unlocked(gem_obj);
 337         return 0;
 338 }
 339
 340 static int panfrost_ioctl_madvise(struct drm_device *dev, void *data,
 341                                   struct drm_file *file_priv)
 342 {
 343         struct drm_panfrost_madvise *args = data;
 344         struct panfrost_device *pfdev = dev->dev_private;
 345         struct drm_gem_object *gem_obj;
 346
 347         gem_obj = drm_gem_object_lookup(file_priv, args->handle);
 348         if (!gem_obj) {
 349                 DRM_DEBUG("Failed to look up GEM BO %d\n", args->handle);
 350                 return -ENOENT;
 351         }
 352
 353         mutex_lock(&pfdev->shrinker_lock);
 354         args->retained = drm_gem_shmem_madvise(gem_obj, args->madv);
 355
 356         if (args->retained) {
 357                 struct panfrost_gem_object *bo = to_panfrost_bo(gem_obj);
 358
 359                 if (args->madv == PANFROST_MADV_DONTNEED)
 360                         list_add_tail(&bo->base.madv_list,
 361                                       &pfdev->shrinker_list);
 362                 else if (args->madv == PANFROST_MADV_WILLNEED)
 363                         list_del_init(&bo->base.madv_list);
 364         }
 365         mutex_unlock(&pfdev->shrinker_lock);
 366
 367         drm_gem_object_put_unlocked(gem_obj);
 368         return 0;
 369 }
 370
 371 int panfrost_unstable_ioctl_check(void)
 372 {
 373         if (!unstable_ioctls)
 374                 return -ENOSYS;
 375
 376         return 0;
 377 }
 378
 379 #define PFN_4G          (SZ_4G >> PAGE_SHIFT)
 380 #define PFN_4G_MASK     (PFN_4G - 1)
 381 #define PFN_16M         (SZ_16M >> PAGE_SHIFT)
 382
 383 static void panfrost_drm_mm_color_adjust(const struct drm_mm_node *node,
 384                                          unsigned long color,
 385                                          u64 *start, u64 *end)
 386 {
 387         /* Executable buffers can't start or end on a 4GB boundary */
 388         if (!(color & PANFROST_BO_NOEXEC)) {
 389                 u64 next_seg;
 390
 391                 if ((*start & PFN_4G_MASK) == 0)
 392                         (*start)++;
 393
 394                 if ((*end & PFN_4G_MASK) == 0)
 395                         (*end)--;
 396
 397                 next_seg = ALIGN(*start, PFN_4G);
 398                 if (next_seg - *start <= PFN_16M)
 399                         *start = next_seg + 1;
 400
 401                 *end = min(*end, ALIGN(*start, PFN_4G) - 1);
 402         }
 403 }
 404
 405 static int
 406 panfrost_open(struct drm_device *dev, struct drm_file *file)
 407 {
 408         int ret;
 409         struct panfrost_device *pfdev = dev->dev_private;
 410         struct panfrost_file_priv *panfrost_priv;
 411
 412         panfrost_priv = kzalloc(sizeof(*panfrost_priv), GFP_KERNEL);
 413         if (!panfrost_priv)
 414                 return -ENOMEM;
 415
 416         panfrost_priv->pfdev = pfdev;
 417         file->driver_priv = panfrost_priv;
 418
 419         spin_lock_init(&panfrost_priv->mm_lock);
 420
 421         /* 4G enough for now. can be 48-bit */
 422         drm_mm_init(&panfrost_priv->mm, SZ_32M >> PAGE_SHIFT, (SZ_4G - SZ_32M) >> PAGE_SHIFT);
 423         panfrost_priv->mm.color_adjust = panfrost_drm_mm_color_adjust;
 424
 425         ret = panfrost_mmu_pgtable_alloc(panfrost_priv);
 426         if (ret)
 427                 goto err_pgtable;
 428
 429         ret = panfrost_job_open(panfrost_priv);
 430         if (ret)
 431                 goto err_job;
 432
 433         return 0;
 434
 435 err_job:
 436         panfrost_mmu_pgtable_free(panfrost_priv);
 437 err_pgtable:
 438         drm_mm_takedown(&panfrost_priv->mm);
 439         kfree(panfrost_priv);
 440         return ret;
 441 }
 442
 443 static void
 444 panfrost_postclose(struct drm_device *dev, struct drm_file *file)
 445 {
 446         struct panfrost_file_priv *panfrost_priv = file->driver_priv;
 447
 448         panfrost_perfcnt_close(file);
 449         panfrost_job_close(panfrost_priv);
 450
 451         panfrost_mmu_pgtable_free(panfrost_priv);
 452         drm_mm_takedown(&panfrost_priv->mm);
 453         kfree(panfrost_priv);
 454 }
 455
 456 /* DRM_AUTH is required on SUBMIT for now, while all clients share a single
 457  * address space.  Note that render nodes would be able to submit jobs that
 458  * could access BOs from clients authenticated with the master node.
 459  */
 460 static const struct drm_ioctl_desc panfrost_drm_driver_ioctls[] = {
 461 #define PANFROST_IOCTL(n, func, flags) \
 462         DRM_IOCTL_DEF_DRV(PANFROST_##n, panfrost_ioctl_##func, flags)
 463
 464         PANFROST_IOCTL(SUBMIT,          submit,         DRM_RENDER_ALLOW | DRM_AUTH),
 465         PANFROST_IOCTL(WAIT_BO,         wait_bo,        DRM_RENDER_ALLOW),
 466         PANFROST_IOCTL(CREATE_BO,       create_bo,      DRM_RENDER_ALLOW),
 467         PANFROST_IOCTL(MMAP_BO,         mmap_bo,        DRM_RENDER_ALLOW),
 468         PANFROST_IOCTL(GET_PARAM,       get_param,      DRM_RENDER_ALLOW),
 469         PANFROST_IOCTL(GET_BO_OFFSET,   get_bo_offset,  DRM_RENDER_ALLOW),
 470         PANFROST_IOCTL(PERFCNT_ENABLE,  perfcnt_enable, DRM_RENDER_ALLOW),
 471         PANFROST_IOCTL(PERFCNT_DUMP,    perfcnt_dump,   DRM_RENDER_ALLOW),
 472         PANFROST_IOCTL(MADVISE,         madvise,        DRM_RENDER_ALLOW),
 473 };
 474
 475 DEFINE_DRM_GEM_FOPS(panfrost_drm_driver_fops);
 476
 477 /*
 478  * Panfrost driver version:
 479  * - 1.0 - initial interface
 480  * - 1.1 - adds HEAP and NOEXEC flags for CREATE_BO
 481  */
 482 static struct drm_driver panfrost_drm_driver = {
 483         .driver_features        = DRIVER_RENDER | DRIVER_GEM | DRIVER_SYNCOBJ,
 484         .open                   = panfrost_open,
 485         .postclose              = panfrost_postclose,
 486         .ioctls                 = panfrost_drm_driver_ioctls,
 487         .num_ioctls             = ARRAY_SIZE(panfrost_drm_driver_ioctls),
 488         .fops                   = &panfrost_drm_driver_fops,
 489         .name                   = "panfrost",
 490         .desc                   = "panfrost DRM",
 491         .date                   = "20180908",
 492         .major                  = 1,
 493         .minor                  = 1,
 494
 495         .gem_create_object      = panfrost_gem_create_object,
 496         .prime_handle_to_fd     = drm_gem_prime_handle_to_fd,
 497         .prime_fd_to_handle     = drm_gem_prime_fd_to_handle,
 498         .gem_prime_import_sg_table = panfrost_gem_prime_import_sg_table,
 499         .gem_prime_mmap         = drm_gem_prime_mmap,
 500 };
 501
 502 static int panfrost_probe(struct platform_device *pdev)
 503 {
 504         struct panfrost_device *pfdev;
 505         struct drm_device *ddev;
 506         int err;
 507
 508         pfdev = devm_kzalloc(&pdev->dev, sizeof(*pfdev), GFP_KERNEL);
 509         if (!pfdev)
 510                 return -ENOMEM;
 511
 512         pfdev->pdev = pdev;
 513         pfdev->dev = &pdev->dev;
 514
 515         platform_set_drvdata(pdev, pfdev);
 516
 517         /* Allocate and initialze the DRM device. */
 518         ddev = drm_dev_alloc(&panfrost_drm_driver, &pdev->dev);
 519         if (IS_ERR(ddev))
 520                 return PTR_ERR(ddev);
 521
 522         ddev->dev_private = pfdev;
 523         pfdev->ddev = ddev;
 524
 525         mutex_init(&pfdev->shrinker_lock);
 526         INIT_LIST_HEAD(&pfdev->shrinker_list);
 527
 528         err = panfrost_device_init(pfdev);
 529         if (err) {
 530                 if (err != -EPROBE_DEFER)
 531                         dev_err(&pdev->dev, "Fatal error during GPU init\n");
 532                 goto err_out0;
 533         }
 534
 535         err = panfrost_devfreq_init(pfdev);
 536         if (err) {
 537                 if (err != -EPROBE_DEFER)
 538                         dev_err(&pdev->dev, "Fatal error during devfreq init\n");
 539                 goto err_out1;
 540         }
 541
 542         pm_runtime_set_active(pfdev->dev);
 543         pm_runtime_mark_last_busy(pfdev->dev);
 544         pm_runtime_enable(pfdev->dev);
 545         pm_runtime_set_autosuspend_delay(pfdev->dev, 50); /* ~3 frames */
 546         pm_runtime_use_autosuspend(pfdev->dev);
 547
 548         /*
 549          * Register the DRM device with the core and the connectors with
 550          * sysfs
 551          */
 552         err = drm_dev_register(ddev, 0);
 553         if (err < 0)
 554                 goto err_out2;
 555
 556         panfrost_gem_shrinker_init(ddev);
 557
 558         return 0;
 559
 560 err_out2:
 561         pm_runtime_disable(pfdev->dev);
 562         panfrost_devfreq_fini(pfdev);
 563 err_out1:
 564         panfrost_device_fini(pfdev);
 565 err_out0:
 566         drm_dev_put(ddev);
 567         return err;
 568 }
 569
 570 static int panfrost_remove(struct platform_device *pdev)
 571 {
 572         struct panfrost_device *pfdev = platform_get_drvdata(pdev);
 573         struct drm_device *ddev = pfdev->ddev;
 574
 575         drm_dev_unregister(ddev);
 576         panfrost_gem_shrinker_cleanup(ddev);
 577
 578         pm_runtime_get_sync(pfdev->dev);
 579         panfrost_devfreq_fini(pfdev);
 580         panfrost_device_fini(pfdev);
 581         pm_runtime_put_sync_suspend(pfdev->dev);
 582         pm_runtime_disable(pfdev->dev);
 583
 584         drm_dev_put(ddev);
 585         return 0;
 586 }
 587
 588 static const struct of_device_id dt_match[] = {
 589         { .compatible = "arm,mali-t604" },
 590         { .compatible = "arm,mali-t624" },
 591         { .compatible = "arm,mali-t628" },
 592         { .compatible = "arm,mali-t720" },
 593         { .compatible = "arm,mali-t760" },
 594         { .compatible = "arm,mali-t820" },
 595         { .compatible = "arm,mali-t830" },
 596         { .compatible = "arm,mali-t860" },
 597         { .compatible = "arm,mali-t880" },
 598         {}
 599 };
 600 MODULE_DEVICE_TABLE(of, dt_match);
 601
 602 static const struct dev_pm_ops panfrost_pm_ops = {
 603         SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend, pm_runtime_force_resume)
 604         SET_RUNTIME_PM_OPS(panfrost_device_suspend, panfrost_device_resume, NULL)
 605 };
 606
 607 static struct platform_driver panfrost_driver = {
 608         .probe          = panfrost_probe,
 609         .remove         = panfrost_remove,
 610         .driver         = {
 611                 .name   = "panfrost",
 612                 .pm     = &panfrost_pm_ops,
 613                 .of_match_table = dt_match,
 614         },
 615 };
 616 module_platform_driver(panfrost_driver);
 617
 618 MODULE_AUTHOR("Panfrost Project Developers");
 619 MODULE_DESCRIPTION("Panfrost DRM Driver");
 620 MODULE_LICENSE("GPL v2");