drivers/gpu/drm/exynos/exynos_drm_drv.c

   1 /*
   2  * Copyright (c) 2011 Samsung Electronics Co., Ltd.
   3  * Authors:
   4  *      Inki Dae <inki.dae@samsung.com>
   5  *      Joonyoung Shim <jy0922.shim@samsung.com>
   6  *      Seung-Woo Kim <sw0312.kim@samsung.com>
   7  *
   8  * This program is free software; you can redistribute  it and/or modify it
   9  * under  the terms of  the GNU General  Public License as published by the
  10  * Free Software Foundation;  either version 2 of the  License, or (at your
  11  * option) any later version.
  12  */
  13
  14 #include <linux/pm_runtime.h>
  15 #include <drm/drmP.h>
  16 #include <drm/drm_atomic.h>
  17 #include <drm/drm_atomic_helper.h>
  18 #include <drm/drm_crtc_helper.h>
  19 #include <drm/drm_fb_helper.h>
  20
  21 #include <linux/component.h>
  22
  23 #include <drm/exynos_drm.h>
  24
  25 #include "exynos_drm_drv.h"
  26 #include "exynos_drm_fbdev.h"
  27 #include "exynos_drm_fb.h"
  28 #include "exynos_drm_gem.h"
  29 #include "exynos_drm_plane.h"
  30 #include "exynos_drm_ipp.h"
  31 #include "exynos_drm_vidi.h"
  32 #include "exynos_drm_g2d.h"
  33 #include "exynos_drm_iommu.h"
  34
  35 #define DRIVER_NAME     "exynos"
  36 #define DRIVER_DESC     "Samsung SoC DRM"
  37 #define DRIVER_DATE     "20180330"
  38
  39 /*
  40  * Interface history:
  41  *
  42  * 1.0 - Original version
  43  * 1.1 - Upgrade IPP driver to version 2.0
  44  */
  45 #define DRIVER_MAJOR    1
  46 #define DRIVER_MINOR    1
  47
  48 int exynos_atomic_check(struct drm_device *dev,
  49                         struct drm_atomic_state *state)
  50 {
  51         int ret;
  52
  53         ret = drm_atomic_helper_check_modeset(dev, state);
  54         if (ret)
  55                 return ret;
  56
  57         ret = drm_atomic_normalize_zpos(dev, state);
  58         if (ret)
  59                 return ret;
  60
  61         ret = drm_atomic_helper_check_planes(dev, state);
  62         if (ret)
  63                 return ret;
  64
  65         return ret;
  66 }
  67
  68 static int exynos_drm_open(struct drm_device *dev, struct drm_file *file)
  69 {
  70         struct drm_exynos_file_private *file_priv;
  71         int ret;
  72
  73         file_priv = kzalloc(sizeof(*file_priv), GFP_KERNEL);
  74         if (!file_priv)
  75                 return -ENOMEM;
  76
  77         file->driver_priv = file_priv;
  78
  79         ret = exynos_drm_subdrv_open(dev, file);
  80         if (ret)
  81                 goto err_file_priv_free;
  82
  83         return ret;
  84
  85 err_file_priv_free:
  86         kfree(file_priv);
  87         file->driver_priv = NULL;
  88         return ret;
  89 }
  90
  91 static void exynos_drm_postclose(struct drm_device *dev, struct drm_file *file)
  92 {
  93         exynos_drm_subdrv_close(dev, file);
  94         kfree(file->driver_priv);
  95         file->driver_priv = NULL;
  96 }
  97
  98 static const struct vm_operations_struct exynos_drm_gem_vm_ops = {
  99         .fault = exynos_drm_gem_fault,
 100         .open = drm_gem_vm_open,
 101         .close = drm_gem_vm_close,
 102 };
 103
 104 static const struct drm_ioctl_desc exynos_ioctls[] = {
 105         DRM_IOCTL_DEF_DRV(EXYNOS_GEM_CREATE, exynos_drm_gem_create_ioctl,
 106                         DRM_AUTH | DRM_RENDER_ALLOW),
 107         DRM_IOCTL_DEF_DRV(EXYNOS_GEM_MAP, exynos_drm_gem_map_ioctl,
 108                         DRM_AUTH | DRM_RENDER_ALLOW),
 109         DRM_IOCTL_DEF_DRV(EXYNOS_GEM_GET, exynos_drm_gem_get_ioctl,
 110                         DRM_RENDER_ALLOW),
 111         DRM_IOCTL_DEF_DRV(EXYNOS_VIDI_CONNECTION, vidi_connection_ioctl,
 112                         DRM_AUTH),
 113         DRM_IOCTL_DEF_DRV(EXYNOS_G2D_GET_VER, exynos_g2d_get_ver_ioctl,
 114                         DRM_AUTH | DRM_RENDER_ALLOW),
 115         DRM_IOCTL_DEF_DRV(EXYNOS_G2D_SET_CMDLIST, exynos_g2d_set_cmdlist_ioctl,
 116                         DRM_AUTH | DRM_RENDER_ALLOW),
 117         DRM_IOCTL_DEF_DRV(EXYNOS_G2D_EXEC, exynos_g2d_exec_ioctl,
 118                         DRM_AUTH | DRM_RENDER_ALLOW),
 119         DRM_IOCTL_DEF_DRV(EXYNOS_IPP_GET_RESOURCES,
 120                         exynos_drm_ipp_get_res_ioctl,
 121                         DRM_AUTH | DRM_RENDER_ALLOW),
 122         DRM_IOCTL_DEF_DRV(EXYNOS_IPP_GET_CAPS, exynos_drm_ipp_get_caps_ioctl,
 123                         DRM_AUTH | DRM_RENDER_ALLOW),
 124         DRM_IOCTL_DEF_DRV(EXYNOS_IPP_GET_LIMITS,
 125                         exynos_drm_ipp_get_limits_ioctl,
 126                         DRM_AUTH | DRM_RENDER_ALLOW),
 127         DRM_IOCTL_DEF_DRV(EXYNOS_IPP_COMMIT, exynos_drm_ipp_commit_ioctl,
 128                         DRM_AUTH | DRM_RENDER_ALLOW),
 129 };
 130
 131 static const struct file_operations exynos_drm_driver_fops = {
 132         .owner          = THIS_MODULE,
 133         .open           = drm_open,
 134         .mmap           = exynos_drm_gem_mmap,
 135         .poll           = drm_poll,
 136         .read           = drm_read,
 137         .unlocked_ioctl = drm_ioctl,
 138         .compat_ioctl = drm_compat_ioctl,
 139         .release        = drm_release,
 140 };
 141
 142 static struct drm_driver exynos_drm_driver = {
 143         .driver_features        = DRIVER_MODESET | DRIVER_GEM | DRIVER_PRIME
 144                                   | DRIVER_ATOMIC | DRIVER_RENDER,
 145         .open                   = exynos_drm_open,
 146         .lastclose              = drm_fb_helper_lastclose,
 147         .postclose              = exynos_drm_postclose,
 148         .gem_free_object_unlocked = exynos_drm_gem_free_object,
 149         .gem_vm_ops             = &exynos_drm_gem_vm_ops,
 150         .dumb_create            = exynos_drm_gem_dumb_create,
 151         .prime_handle_to_fd     = drm_gem_prime_handle_to_fd,
 152         .prime_fd_to_handle     = drm_gem_prime_fd_to_handle,
 153         .gem_prime_export       = drm_gem_prime_export,
 154         .gem_prime_import       = exynos_drm_gem_prime_import,
 155         .gem_prime_get_sg_table = exynos_drm_gem_prime_get_sg_table,
 156         .gem_prime_import_sg_table      = exynos_drm_gem_prime_import_sg_table,
 157         .gem_prime_vmap         = exynos_drm_gem_prime_vmap,
 158         .gem_prime_vunmap       = exynos_drm_gem_prime_vunmap,
 159         .gem_prime_mmap         = exynos_drm_gem_prime_mmap,
 160         .ioctls                 = exynos_ioctls,
 161         .num_ioctls             = ARRAY_SIZE(exynos_ioctls),
 162         .fops                   = &exynos_drm_driver_fops,
 163         .name   = DRIVER_NAME,
 164         .desc   = DRIVER_DESC,
 165         .date   = DRIVER_DATE,
 166         .major  = DRIVER_MAJOR,
 167         .minor  = DRIVER_MINOR,
 168 };
 169
 170 #ifdef CONFIG_PM_SLEEP
 171 static int exynos_drm_suspend(struct device *dev)
 172 {
 173         struct drm_device *drm_dev = dev_get_drvdata(dev);
 174         struct exynos_drm_private *private;
 175
 176         if (pm_runtime_suspended(dev) || !drm_dev)
 177                 return 0;
 178
 179         private = drm_dev->dev_private;
 180
 181         drm_kms_helper_poll_disable(drm_dev);
 182         exynos_drm_fbdev_suspend(drm_dev);
 183         private->suspend_state = drm_atomic_helper_suspend(drm_dev);
 184         if (IS_ERR(private->suspend_state)) {
 185                 exynos_drm_fbdev_resume(drm_dev);
 186                 drm_kms_helper_poll_enable(drm_dev);
 187                 return PTR_ERR(private->suspend_state);
 188         }
 189
 190         return 0;
 191 }
 192
 193 static int exynos_drm_resume(struct device *dev)
 194 {
 195         struct drm_device *drm_dev = dev_get_drvdata(dev);
 196         struct exynos_drm_private *private;
 197
 198         if (pm_runtime_suspended(dev) || !drm_dev)
 199                 return 0;
 200
 201         private = drm_dev->dev_private;
 202         drm_atomic_helper_resume(drm_dev, private->suspend_state);
 203         exynos_drm_fbdev_resume(drm_dev);
 204         drm_kms_helper_poll_enable(drm_dev);
 205
 206         return 0;
 207 }
 208 #endif
 209
 210 static const struct dev_pm_ops exynos_drm_pm_ops = {
 211         SET_SYSTEM_SLEEP_PM_OPS(exynos_drm_suspend, exynos_drm_resume)
 212 };
 213
 214 /* forward declaration */
 215 static struct platform_driver exynos_drm_platform_driver;
 216
 217 struct exynos_drm_driver_info {
 218         struct platform_driver *driver;
 219         unsigned int flags;
 220 };
 221
 222 #define DRM_COMPONENT_DRIVER    BIT(0)  /* supports component framework */
 223 #define DRM_VIRTUAL_DEVICE      BIT(1)  /* create virtual platform device */
 224 #define DRM_DMA_DEVICE          BIT(2)  /* can be used for dma allocations */
 225 #define DRM_FIMC_DEVICE         BIT(3)  /* devices shared with V4L2 subsystem */
 226
 227 #define DRV_PTR(drv, cond) (IS_ENABLED(cond) ? &drv : NULL)
 228
 229 /*
 230  * Connector drivers should not be placed before associated crtc drivers,
 231  * because connector requires pipe number of its crtc during initialization.
 232  */
 233 static struct exynos_drm_driver_info exynos_drm_drivers[] = {
 234         {
 235                 DRV_PTR(fimd_driver, CONFIG_DRM_EXYNOS_FIMD),
 236                 DRM_COMPONENT_DRIVER | DRM_DMA_DEVICE
 237         }, {
 238                 DRV_PTR(exynos5433_decon_driver, CONFIG_DRM_EXYNOS5433_DECON),
 239                 DRM_COMPONENT_DRIVER | DRM_DMA_DEVICE
 240         }, {
 241                 DRV_PTR(decon_driver, CONFIG_DRM_EXYNOS7_DECON),
 242                 DRM_COMPONENT_DRIVER | DRM_DMA_DEVICE
 243         }, {
 244                 DRV_PTR(mixer_driver, CONFIG_DRM_EXYNOS_MIXER),
 245                 DRM_COMPONENT_DRIVER | DRM_DMA_DEVICE
 246         }, {
 247                 DRV_PTR(mic_driver, CONFIG_DRM_EXYNOS_MIC),
 248                 DRM_COMPONENT_DRIVER
 249         }, {
 250                 DRV_PTR(dp_driver, CONFIG_DRM_EXYNOS_DP),
 251                 DRM_COMPONENT_DRIVER
 252         }, {
 253                 DRV_PTR(dsi_driver, CONFIG_DRM_EXYNOS_DSI),
 254                 DRM_COMPONENT_DRIVER
 255         }, {
 256                 DRV_PTR(hdmi_driver, CONFIG_DRM_EXYNOS_HDMI),
 257                 DRM_COMPONENT_DRIVER
 258         }, {
 259                 DRV_PTR(vidi_driver, CONFIG_DRM_EXYNOS_VIDI),
 260                 DRM_COMPONENT_DRIVER | DRM_VIRTUAL_DEVICE
 261         }, {
 262                 DRV_PTR(g2d_driver, CONFIG_DRM_EXYNOS_G2D),
 263         }, {
 264                 DRV_PTR(fimc_driver, CONFIG_DRM_EXYNOS_FIMC),
 265                 DRM_COMPONENT_DRIVER | DRM_FIMC_DEVICE,
 266         }, {
 267                 DRV_PTR(rotator_driver, CONFIG_DRM_EXYNOS_ROTATOR),
 268                 DRM_COMPONENT_DRIVER
 269         }, {
 270                 DRV_PTR(scaler_driver, CONFIG_DRM_EXYNOS_SCALER),
 271                 DRM_COMPONENT_DRIVER
 272         }, {
 273                 DRV_PTR(gsc_driver, CONFIG_DRM_EXYNOS_GSC),
 274                 DRM_COMPONENT_DRIVER
 275         }, {
 276                 &exynos_drm_platform_driver,
 277                 DRM_VIRTUAL_DEVICE
 278         }
 279 };
 280
 281 static int compare_dev(struct device *dev, void *data)
 282 {
 283         return dev == (struct device *)data;
 284 }
 285
 286 static struct component_match *exynos_drm_match_add(struct device *dev)
 287 {
 288         struct component_match *match = NULL;
 289         int i;
 290
 291         for (i = 0; i < ARRAY_SIZE(exynos_drm_drivers); ++i) {
 292                 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i];
 293                 struct device *p = NULL, *d;
 294
 295                 if (!info->driver || !(info->flags & DRM_COMPONENT_DRIVER))
 296                         continue;
 297
 298                 while ((d = bus_find_device(&platform_bus_type, p,
 299                                             &info->driver->driver,
 300                                             (void *)platform_bus_type.match))) {
 301                         put_device(p);
 302
 303                         if (!(info->flags & DRM_FIMC_DEVICE) ||
 304                             exynos_drm_check_fimc_device(d) == 0)
 305                                 component_match_add(dev, &match,
 306                                                     compare_dev, d);
 307                         p = d;
 308                 }
 309                 put_device(p);
 310         }
 311
 312         return match ?: ERR_PTR(-ENODEV);
 313 }
 314
 315 static struct device *exynos_drm_get_dma_device(void)
 316 {
 317         int i;
 318
 319         for (i = 0; i < ARRAY_SIZE(exynos_drm_drivers); ++i) {
 320                 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i];
 321                 struct device *dev;
 322
 323                 if (!info->driver || !(info->flags & DRM_DMA_DEVICE))
 324                         continue;
 325
 326                 while ((dev = bus_find_device(&platform_bus_type, NULL,
 327                                             &info->driver->driver,
 328                                             (void *)platform_bus_type.match))) {
 329                         put_device(dev);
 330                         return dev;
 331                 }
 332         }
 333         return NULL;
 334 }
 335
 336 static int exynos_drm_bind(struct device *dev)
 337 {
 338         struct exynos_drm_private *private;
 339         struct drm_encoder *encoder;
 340         struct drm_device *drm;
 341         unsigned int clone_mask;
 342         int cnt, ret;
 343
 344         drm = drm_dev_alloc(&exynos_drm_driver, dev);
 345         if (IS_ERR(drm))
 346                 return PTR_ERR(drm);
 347
 348         private = kzalloc(sizeof(struct exynos_drm_private), GFP_KERNEL);
 349         if (!private) {
 350                 ret = -ENOMEM;
 351                 goto err_free_drm;
 352         }
 353
 354         init_waitqueue_head(&private->wait);
 355         spin_lock_init(&private->lock);
 356
 357         dev_set_drvdata(dev, drm);
 358         drm->dev_private = (void *)private;
 359
 360         /* the first real CRTC device is used for all dma mapping operations */
 361         private->dma_dev = exynos_drm_get_dma_device();
 362         if (!private->dma_dev) {
 363                 DRM_ERROR("no device found for DMA mapping operations.\n");
 364                 ret = -ENODEV;
 365                 goto err_free_private;
 366         }
 367         DRM_INFO("Exynos DRM: using %s device for DMA mapping operations\n",
 368                  dev_name(private->dma_dev));
 369
 370         /* create common IOMMU mapping for all devices attached to Exynos DRM */
 371         ret = drm_create_iommu_mapping(drm);
 372         if (ret < 0) {
 373                 DRM_ERROR("failed to create iommu mapping.\n");
 374                 goto err_free_private;
 375         }
 376
 377         drm_mode_config_init(drm);
 378
 379         exynos_drm_mode_config_init(drm);
 380
 381         /* setup possible_clones. */
 382         cnt = 0;
 383         clone_mask = 0;
 384         list_for_each_entry(encoder, &drm->mode_config.encoder_list, head)
 385                 clone_mask |= (1 << (cnt++));
 386
 387         list_for_each_entry(encoder, &drm->mode_config.encoder_list, head)
 388                 encoder->possible_clones = clone_mask;
 389
 390         /* Try to bind all sub drivers. */
 391         ret = component_bind_all(drm->dev, drm);
 392         if (ret)
 393                 goto err_mode_config_cleanup;
 394
 395         ret = drm_vblank_init(drm, drm->mode_config.num_crtc);
 396         if (ret)
 397                 goto err_unbind_all;
 398
 399         /* Probe non kms sub drivers and virtual display driver. */
 400         ret = exynos_drm_device_subdrv_probe(drm);
 401         if (ret)
 402                 goto err_unbind_all;
 403
 404         drm_mode_config_reset(drm);
 405
 406         /*
 407          * enable drm irq mode.
 408          * - with irq_enabled = true, we can use the vblank feature.
 409          *
 410          * P.S. note that we wouldn't use drm irq handler but
 411          *      just specific driver own one instead because
 412          *      drm framework supports only one irq handler.
 413          */
 414         drm->irq_enabled = true;
 415
 416         /* init kms poll for handling hpd */
 417         drm_kms_helper_poll_init(drm);
 418
 419         ret = exynos_drm_fbdev_init(drm);
 420         if (ret)
 421                 goto err_cleanup_poll;
 422
 423         /* register the DRM device */
 424         ret = drm_dev_register(drm, 0);
 425         if (ret < 0)
 426                 goto err_cleanup_fbdev;
 427
 428         return 0;
 429
 430 err_cleanup_fbdev:
 431         exynos_drm_fbdev_fini(drm);
 432 err_cleanup_poll:
 433         drm_kms_helper_poll_fini(drm);
 434         exynos_drm_device_subdrv_remove(drm);
 435 err_unbind_all:
 436         component_unbind_all(drm->dev, drm);
 437 err_mode_config_cleanup:
 438         drm_mode_config_cleanup(drm);
 439         drm_release_iommu_mapping(drm);
 440 err_free_private:
 441         kfree(private);
 442 err_free_drm:
 443         drm_dev_unref(drm);
 444
 445         return ret;
 446 }
 447
 448 static void exynos_drm_unbind(struct device *dev)
 449 {
 450         struct drm_device *drm = dev_get_drvdata(dev);
 451
 452         drm_dev_unregister(drm);
 453
 454         exynos_drm_device_subdrv_remove(drm);
 455
 456         exynos_drm_fbdev_fini(drm);
 457         drm_kms_helper_poll_fini(drm);
 458
 459         component_unbind_all(drm->dev, drm);
 460         drm_mode_config_cleanup(drm);
 461         drm_release_iommu_mapping(drm);
 462
 463         kfree(drm->dev_private);
 464         drm->dev_private = NULL;
 465         dev_set_drvdata(dev, NULL);
 466
 467         drm_dev_unref(drm);
 468 }
 469
 470 static const struct component_master_ops exynos_drm_ops = {
 471         .bind           = exynos_drm_bind,
 472         .unbind         = exynos_drm_unbind,
 473 };
 474
 475 static int exynos_drm_platform_probe(struct platform_device *pdev)
 476 {
 477         struct component_match *match;
 478
 479         pdev->dev.coherent_dma_mask = DMA_BIT_MASK(32);
 480
 481         match = exynos_drm_match_add(&pdev->dev);
 482         if (IS_ERR(match))
 483                 return PTR_ERR(match);
 484
 485         return component_master_add_with_match(&pdev->dev, &exynos_drm_ops,
 486                                                match);
 487 }
 488
 489 static int exynos_drm_platform_remove(struct platform_device *pdev)
 490 {
 491         component_master_del(&pdev->dev, &exynos_drm_ops);
 492         return 0;
 493 }
 494
 495 static struct platform_driver exynos_drm_platform_driver = {
 496         .probe  = exynos_drm_platform_probe,
 497         .remove = exynos_drm_platform_remove,
 498         .driver = {
 499                 .name   = "exynos-drm",
 500                 .pm     = &exynos_drm_pm_ops,
 501         },
 502 };
 503
 504 static void exynos_drm_unregister_devices(void)
 505 {
 506         int i;
 507
 508         for (i = ARRAY_SIZE(exynos_drm_drivers) - 1; i >= 0; --i) {
 509                 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i];
 510                 struct device *dev;
 511
 512                 if (!info->driver || !(info->flags & DRM_VIRTUAL_DEVICE))
 513                         continue;
 514
 515                 while ((dev = bus_find_device(&platform_bus_type, NULL,
 516                                             &info->driver->driver,
 517                                             (void *)platform_bus_type.match))) {
 518                         put_device(dev);
 519                         platform_device_unregister(to_platform_device(dev));
 520                 }
 521         }
 522 }
 523
 524 static int exynos_drm_register_devices(void)
 525 {
 526         struct platform_device *pdev;
 527         int i;
 528
 529         for (i = 0; i < ARRAY_SIZE(exynos_drm_drivers); ++i) {
 530                 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i];
 531
 532                 if (!info->driver || !(info->flags & DRM_VIRTUAL_DEVICE))
 533                         continue;
 534
 535                 pdev = platform_device_register_simple(
 536                                         info->driver->driver.name, -1, NULL, 0);
 537                 if (IS_ERR(pdev))
 538                         goto fail;
 539         }
 540
 541         return 0;
 542 fail:
 543         exynos_drm_unregister_devices();
 544         return PTR_ERR(pdev);
 545 }
 546
 547 static void exynos_drm_unregister_drivers(void)
 548 {
 549         int i;
 550
 551         for (i = ARRAY_SIZE(exynos_drm_drivers) - 1; i >= 0; --i) {
 552                 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i];
 553
 554                 if (!info->driver)
 555                         continue;
 556
 557                 platform_driver_unregister(info->driver);
 558         }
 559 }
 560
 561 static int exynos_drm_register_drivers(void)
 562 {
 563         int i, ret;
 564
 565         for (i = 0; i < ARRAY_SIZE(exynos_drm_drivers); ++i) {
 566                 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i];
 567
 568                 if (!info->driver)
 569                         continue;
 570
 571                 ret = platform_driver_register(info->driver);
 572                 if (ret)
 573                         goto fail;
 574         }
 575         return 0;
 576 fail:
 577         exynos_drm_unregister_drivers();
 578         return ret;
 579 }
 580
 581 static int exynos_drm_init(void)
 582 {
 583         int ret;
 584
 585         ret = exynos_drm_register_devices();
 586         if (ret)
 587                 return ret;
 588
 589         ret = exynos_drm_register_drivers();
 590         if (ret)
 591                 goto err_unregister_pdevs;
 592
 593         return 0;
 594
 595 err_unregister_pdevs:
 596         exynos_drm_unregister_devices();
 597
 598         return ret;
 599 }
 600
 601 static void exynos_drm_exit(void)
 602 {
 603         exynos_drm_unregister_drivers();
 604         exynos_drm_unregister_devices();
 605 }
 606
 607 module_init(exynos_drm_init);
 608 module_exit(exynos_drm_exit);
 609
 610 MODULE_AUTHOR("Inki Dae <inki.dae@samsung.com>");
 611 MODULE_AUTHOR("Joonyoung Shim <jy0922.shim@samsung.com>");
 612 MODULE_AUTHOR("Seung-Woo Kim <sw0312.kim@samsung.com>");
 613 MODULE_DESCRIPTION("Samsung SoC DRM Driver");
 614 MODULE_LICENSE("GPL");