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_crtc_helper.h> 17 18 #include <linux/component.h> 19 20 #include <drm/exynos_drm.h> 21 22 #include "exynos_drm_drv.h" 23 #include "exynos_drm_crtc.h" 24 #include "exynos_drm_encoder.h" 25 #include "exynos_drm_fbdev.h" 26 #include "exynos_drm_fb.h" 27 #include "exynos_drm_gem.h" 28 #include "exynos_drm_plane.h" 29 #include "exynos_drm_vidi.h" 30 #include "exynos_drm_dmabuf.h" 31 #include "exynos_drm_g2d.h" 32 #include "exynos_drm_ipp.h" 33 #include "exynos_drm_iommu.h" 34 35 #define DRIVER_NAME "exynos" 36 #define DRIVER_DESC "Samsung SoC DRM" 37 #define DRIVER_DATE "20110530" 38 #define DRIVER_MAJOR 1 39 #define DRIVER_MINOR 0 40 41 static struct platform_device *exynos_drm_pdev; 42 43 static DEFINE_MUTEX(drm_component_lock); 44 static LIST_HEAD(drm_component_list); 45 46 struct component_dev { 47 struct list_head list; 48 struct device *crtc_dev; 49 struct device *conn_dev; 50 enum exynos_drm_output_type out_type; 51 unsigned int dev_type_flag; 52 }; 53 54 static int exynos_drm_load(struct drm_device *dev, unsigned long flags) 55 { 56 struct exynos_drm_private *private; 57 int ret; 58 59 private = kzalloc(sizeof(struct exynos_drm_private), GFP_KERNEL); 60 if (!private) 61 return -ENOMEM; 62 63 dev_set_drvdata(dev->dev, dev); 64 dev->dev_private = (void *)private; 65 66 /* 67 * create mapping to manage iommu table and set a pointer to iommu 68 * mapping structure to iommu_mapping of private data. 69 * also this iommu_mapping can be used to check if iommu is supported 70 * or not. 71 */ 72 ret = drm_create_iommu_mapping(dev); 73 if (ret < 0) { 74 DRM_ERROR("failed to create iommu mapping.\n"); 75 goto err_free_private; 76 } 77 78 drm_mode_config_init(dev); 79 80 exynos_drm_mode_config_init(dev); 81 82 /* setup possible_clones. */ 83 exynos_drm_encoder_setup(dev); 84 85 platform_set_drvdata(dev->platformdev, dev); 86 87 /* Try to bind all sub drivers. */ 88 ret = component_bind_all(dev->dev, dev); 89 if (ret) 90 goto err_mode_config_cleanup; 91 92 ret = drm_vblank_init(dev, dev->mode_config.num_crtc); 93 if (ret) 94 goto err_unbind_all; 95 96 /* Probe non kms sub drivers and virtual display driver. */ 97 ret = exynos_drm_device_subdrv_probe(dev); 98 if (ret) 99 goto err_cleanup_vblank; 100 101 /* 102 * enable drm irq mode. 103 * - with irq_enabled = true, we can use the vblank feature. 104 * 105 * P.S. note that we wouldn't use drm irq handler but 106 * just specific driver own one instead because 107 * drm framework supports only one irq handler. 108 */ 109 dev->irq_enabled = true; 110 111 /* 112 * with vblank_disable_allowed = true, vblank interrupt will be disabled 113 * by drm timer once a current process gives up ownership of 114 * vblank event.(after drm_vblank_put function is called) 115 */ 116 dev->vblank_disable_allowed = true; 117 118 /* init kms poll for handling hpd */ 119 drm_kms_helper_poll_init(dev); 120 121 /* force connectors detection */ 122 drm_helper_hpd_irq_event(dev); 123 124 return 0; 125 126 err_cleanup_vblank: 127 drm_vblank_cleanup(dev); 128 err_unbind_all: 129 component_unbind_all(dev->dev, dev); 130 err_mode_config_cleanup: 131 drm_mode_config_cleanup(dev); 132 drm_release_iommu_mapping(dev); 133 err_free_private: 134 kfree(private); 135 136 return ret; 137 } 138 139 static int exynos_drm_unload(struct drm_device *dev) 140 { 141 exynos_drm_device_subdrv_remove(dev); 142 143 exynos_drm_fbdev_fini(dev); 144 drm_kms_helper_poll_fini(dev); 145 146 drm_vblank_cleanup(dev); 147 component_unbind_all(dev->dev, dev); 148 drm_mode_config_cleanup(dev); 149 drm_release_iommu_mapping(dev); 150 151 kfree(dev->dev_private); 152 dev->dev_private = NULL; 153 154 return 0; 155 } 156 157 static int exynos_drm_suspend(struct drm_device *dev, pm_message_t state) 158 { 159 struct drm_connector *connector; 160 161 drm_modeset_lock_all(dev); 162 list_for_each_entry(connector, &dev->mode_config.connector_list, head) { 163 int old_dpms = connector->dpms; 164 165 if (connector->funcs->dpms) 166 connector->funcs->dpms(connector, DRM_MODE_DPMS_OFF); 167 168 /* Set the old mode back to the connector for resume */ 169 connector->dpms = old_dpms; 170 } 171 drm_modeset_unlock_all(dev); 172 173 return 0; 174 } 175 176 static int exynos_drm_resume(struct drm_device *dev) 177 { 178 struct drm_connector *connector; 179 180 drm_modeset_lock_all(dev); 181 list_for_each_entry(connector, &dev->mode_config.connector_list, head) { 182 if (connector->funcs->dpms) { 183 int dpms = connector->dpms; 184 185 connector->dpms = DRM_MODE_DPMS_OFF; 186 connector->funcs->dpms(connector, dpms); 187 } 188 } 189 drm_modeset_unlock_all(dev); 190 191 return 0; 192 } 193 194 static int exynos_drm_open(struct drm_device *dev, struct drm_file *file) 195 { 196 struct drm_exynos_file_private *file_priv; 197 int ret; 198 199 file_priv = kzalloc(sizeof(*file_priv), GFP_KERNEL); 200 if (!file_priv) 201 return -ENOMEM; 202 203 file->driver_priv = file_priv; 204 205 ret = exynos_drm_subdrv_open(dev, file); 206 if (ret) 207 goto err_file_priv_free; 208 209 return ret; 210 211 err_file_priv_free: 212 kfree(file_priv); 213 file->driver_priv = NULL; 214 return ret; 215 } 216 217 static void exynos_drm_preclose(struct drm_device *dev, 218 struct drm_file *file) 219 { 220 exynos_drm_subdrv_close(dev, file); 221 } 222 223 static void exynos_drm_postclose(struct drm_device *dev, struct drm_file *file) 224 { 225 struct drm_pending_event *e, *et; 226 unsigned long flags; 227 228 if (!file->driver_priv) 229 return; 230 231 spin_lock_irqsave(&dev->event_lock, flags); 232 /* Release all events handled by page flip handler but not freed. */ 233 list_for_each_entry_safe(e, et, &file->event_list, link) { 234 list_del(&e->link); 235 e->destroy(e); 236 } 237 spin_unlock_irqrestore(&dev->event_lock, flags); 238 239 kfree(file->driver_priv); 240 file->driver_priv = NULL; 241 } 242 243 static void exynos_drm_lastclose(struct drm_device *dev) 244 { 245 exynos_drm_fbdev_restore_mode(dev); 246 } 247 248 static const struct vm_operations_struct exynos_drm_gem_vm_ops = { 249 .fault = exynos_drm_gem_fault, 250 .open = drm_gem_vm_open, 251 .close = drm_gem_vm_close, 252 }; 253 254 static const struct drm_ioctl_desc exynos_ioctls[] = { 255 DRM_IOCTL_DEF_DRV(EXYNOS_GEM_CREATE, exynos_drm_gem_create_ioctl, 256 DRM_UNLOCKED | DRM_AUTH), 257 DRM_IOCTL_DEF_DRV(EXYNOS_GEM_GET, 258 exynos_drm_gem_get_ioctl, DRM_UNLOCKED), 259 DRM_IOCTL_DEF_DRV(EXYNOS_VIDI_CONNECTION, 260 vidi_connection_ioctl, DRM_UNLOCKED | DRM_AUTH), 261 DRM_IOCTL_DEF_DRV(EXYNOS_G2D_GET_VER, 262 exynos_g2d_get_ver_ioctl, DRM_UNLOCKED | DRM_AUTH), 263 DRM_IOCTL_DEF_DRV(EXYNOS_G2D_SET_CMDLIST, 264 exynos_g2d_set_cmdlist_ioctl, DRM_UNLOCKED | DRM_AUTH), 265 DRM_IOCTL_DEF_DRV(EXYNOS_G2D_EXEC, 266 exynos_g2d_exec_ioctl, DRM_UNLOCKED | DRM_AUTH), 267 DRM_IOCTL_DEF_DRV(EXYNOS_IPP_GET_PROPERTY, 268 exynos_drm_ipp_get_property, DRM_UNLOCKED | DRM_AUTH), 269 DRM_IOCTL_DEF_DRV(EXYNOS_IPP_SET_PROPERTY, 270 exynos_drm_ipp_set_property, DRM_UNLOCKED | DRM_AUTH), 271 DRM_IOCTL_DEF_DRV(EXYNOS_IPP_QUEUE_BUF, 272 exynos_drm_ipp_queue_buf, DRM_UNLOCKED | DRM_AUTH), 273 DRM_IOCTL_DEF_DRV(EXYNOS_IPP_CMD_CTRL, 274 exynos_drm_ipp_cmd_ctrl, DRM_UNLOCKED | DRM_AUTH), 275 }; 276 277 static const struct file_operations exynos_drm_driver_fops = { 278 .owner = THIS_MODULE, 279 .open = drm_open, 280 .mmap = exynos_drm_gem_mmap, 281 .poll = drm_poll, 282 .read = drm_read, 283 .unlocked_ioctl = drm_ioctl, 284 #ifdef CONFIG_COMPAT 285 .compat_ioctl = drm_compat_ioctl, 286 #endif 287 .release = drm_release, 288 }; 289 290 static struct drm_driver exynos_drm_driver = { 291 .driver_features = DRIVER_MODESET | DRIVER_GEM | DRIVER_PRIME, 292 .load = exynos_drm_load, 293 .unload = exynos_drm_unload, 294 .suspend = exynos_drm_suspend, 295 .resume = exynos_drm_resume, 296 .open = exynos_drm_open, 297 .preclose = exynos_drm_preclose, 298 .lastclose = exynos_drm_lastclose, 299 .postclose = exynos_drm_postclose, 300 .set_busid = drm_platform_set_busid, 301 .get_vblank_counter = drm_vblank_count, 302 .enable_vblank = exynos_drm_crtc_enable_vblank, 303 .disable_vblank = exynos_drm_crtc_disable_vblank, 304 .gem_free_object = exynos_drm_gem_free_object, 305 .gem_vm_ops = &exynos_drm_gem_vm_ops, 306 .dumb_create = exynos_drm_gem_dumb_create, 307 .dumb_map_offset = exynos_drm_gem_dumb_map_offset, 308 .dumb_destroy = drm_gem_dumb_destroy, 309 .prime_handle_to_fd = drm_gem_prime_handle_to_fd, 310 .prime_fd_to_handle = drm_gem_prime_fd_to_handle, 311 .gem_prime_export = exynos_dmabuf_prime_export, 312 .gem_prime_import = exynos_dmabuf_prime_import, 313 .ioctls = exynos_ioctls, 314 .num_ioctls = ARRAY_SIZE(exynos_ioctls), 315 .fops = &exynos_drm_driver_fops, 316 .name = DRIVER_NAME, 317 .desc = DRIVER_DESC, 318 .date = DRIVER_DATE, 319 .major = DRIVER_MAJOR, 320 .minor = DRIVER_MINOR, 321 }; 322 323 #ifdef CONFIG_PM_SLEEP 324 static int exynos_drm_sys_suspend(struct device *dev) 325 { 326 struct drm_device *drm_dev = dev_get_drvdata(dev); 327 pm_message_t message; 328 329 if (pm_runtime_suspended(dev) || !drm_dev) 330 return 0; 331 332 message.event = PM_EVENT_SUSPEND; 333 return exynos_drm_suspend(drm_dev, message); 334 } 335 336 static int exynos_drm_sys_resume(struct device *dev) 337 { 338 struct drm_device *drm_dev = dev_get_drvdata(dev); 339 340 if (pm_runtime_suspended(dev) || !drm_dev) 341 return 0; 342 343 return exynos_drm_resume(drm_dev); 344 } 345 #endif 346 347 static const struct dev_pm_ops exynos_drm_pm_ops = { 348 SET_SYSTEM_SLEEP_PM_OPS(exynos_drm_sys_suspend, exynos_drm_sys_resume) 349 }; 350 351 int exynos_drm_component_add(struct device *dev, 352 enum exynos_drm_device_type dev_type, 353 enum exynos_drm_output_type out_type) 354 { 355 struct component_dev *cdev; 356 357 if (dev_type != EXYNOS_DEVICE_TYPE_CRTC && 358 dev_type != EXYNOS_DEVICE_TYPE_CONNECTOR) { 359 DRM_ERROR("invalid device type.\n"); 360 return -EINVAL; 361 } 362 363 mutex_lock(&drm_component_lock); 364 365 /* 366 * Make sure to check if there is a component which has two device 367 * objects, for connector and for encoder/connector. 368 * It should make sure that crtc and encoder/connector drivers are 369 * ready before exynos drm core binds them. 370 */ 371 list_for_each_entry(cdev, &drm_component_list, list) { 372 if (cdev->out_type == out_type) { 373 /* 374 * If crtc and encoder/connector device objects are 375 * added already just return. 376 */ 377 if (cdev->dev_type_flag == (EXYNOS_DEVICE_TYPE_CRTC | 378 EXYNOS_DEVICE_TYPE_CONNECTOR)) { 379 mutex_unlock(&drm_component_lock); 380 return 0; 381 } 382 383 if (dev_type == EXYNOS_DEVICE_TYPE_CRTC) { 384 cdev->crtc_dev = dev; 385 cdev->dev_type_flag |= dev_type; 386 } 387 388 if (dev_type == EXYNOS_DEVICE_TYPE_CONNECTOR) { 389 cdev->conn_dev = dev; 390 cdev->dev_type_flag |= dev_type; 391 } 392 393 mutex_unlock(&drm_component_lock); 394 return 0; 395 } 396 } 397 398 mutex_unlock(&drm_component_lock); 399 400 cdev = kzalloc(sizeof(*cdev), GFP_KERNEL); 401 if (!cdev) 402 return -ENOMEM; 403 404 if (dev_type == EXYNOS_DEVICE_TYPE_CRTC) 405 cdev->crtc_dev = dev; 406 if (dev_type == EXYNOS_DEVICE_TYPE_CONNECTOR) 407 cdev->conn_dev = dev; 408 409 cdev->out_type = out_type; 410 cdev->dev_type_flag = dev_type; 411 412 mutex_lock(&drm_component_lock); 413 list_add_tail(&cdev->list, &drm_component_list); 414 mutex_unlock(&drm_component_lock); 415 416 return 0; 417 } 418 419 void exynos_drm_component_del(struct device *dev, 420 enum exynos_drm_device_type dev_type) 421 { 422 struct component_dev *cdev, *next; 423 424 mutex_lock(&drm_component_lock); 425 426 list_for_each_entry_safe(cdev, next, &drm_component_list, list) { 427 if (dev_type == EXYNOS_DEVICE_TYPE_CRTC) { 428 if (cdev->crtc_dev == dev) { 429 cdev->crtc_dev = NULL; 430 cdev->dev_type_flag &= ~dev_type; 431 } 432 } 433 434 if (dev_type == EXYNOS_DEVICE_TYPE_CONNECTOR) { 435 if (cdev->conn_dev == dev) { 436 cdev->conn_dev = NULL; 437 cdev->dev_type_flag &= ~dev_type; 438 } 439 } 440 441 /* 442 * Release cdev object only in case that both of crtc and 443 * encoder/connector device objects are NULL. 444 */ 445 if (!cdev->crtc_dev && !cdev->conn_dev) { 446 list_del(&cdev->list); 447 kfree(cdev); 448 } 449 } 450 451 mutex_unlock(&drm_component_lock); 452 } 453 454 static int compare_dev(struct device *dev, void *data) 455 { 456 return dev == (struct device *)data; 457 } 458 459 static struct component_match *exynos_drm_match_add(struct device *dev) 460 { 461 struct component_match *match = NULL; 462 struct component_dev *cdev; 463 unsigned int attach_cnt = 0; 464 465 mutex_lock(&drm_component_lock); 466 467 /* Do not retry to probe if there is no any kms driver regitered. */ 468 if (list_empty(&drm_component_list)) { 469 mutex_unlock(&drm_component_lock); 470 return ERR_PTR(-ENODEV); 471 } 472 473 list_for_each_entry(cdev, &drm_component_list, list) { 474 /* 475 * Add components to master only in case that crtc and 476 * encoder/connector device objects exist. 477 */ 478 if (!cdev->crtc_dev || !cdev->conn_dev) 479 continue; 480 481 attach_cnt++; 482 483 mutex_unlock(&drm_component_lock); 484 485 /* 486 * fimd and dpi modules have same device object so add 487 * only crtc device object in this case. 488 */ 489 if (cdev->crtc_dev == cdev->conn_dev) { 490 component_match_add(dev, &match, compare_dev, 491 cdev->crtc_dev); 492 goto out_lock; 493 } 494 495 /* 496 * Do not chage below call order. 497 * crtc device first should be added to master because 498 * connector/encoder need pipe number of crtc when they 499 * are created. 500 */ 501 component_match_add(dev, &match, compare_dev, cdev->crtc_dev); 502 component_match_add(dev, &match, compare_dev, cdev->conn_dev); 503 504 out_lock: 505 mutex_lock(&drm_component_lock); 506 } 507 508 mutex_unlock(&drm_component_lock); 509 510 return attach_cnt ? match : ERR_PTR(-EPROBE_DEFER); 511 } 512 513 static int exynos_drm_bind(struct device *dev) 514 { 515 return drm_platform_init(&exynos_drm_driver, to_platform_device(dev)); 516 } 517 518 static void exynos_drm_unbind(struct device *dev) 519 { 520 drm_put_dev(dev_get_drvdata(dev)); 521 } 522 523 static const struct component_master_ops exynos_drm_ops = { 524 .bind = exynos_drm_bind, 525 .unbind = exynos_drm_unbind, 526 }; 527 528 static struct platform_driver *const exynos_drm_kms_drivers[] = { 529 #ifdef CONFIG_DRM_EXYNOS_FIMD 530 &fimd_driver, 531 #endif 532 #ifdef CONFIG_DRM_EXYNOS7_DECON 533 &decon_driver, 534 #endif 535 #ifdef CONFIG_DRM_EXYNOS_DP 536 &dp_driver, 537 #endif 538 #ifdef CONFIG_DRM_EXYNOS_DSI 539 &dsi_driver, 540 #endif 541 #ifdef CONFIG_DRM_EXYNOS_HDMI 542 &mixer_driver, 543 &hdmi_driver, 544 #endif 545 }; 546 547 static struct platform_driver *const exynos_drm_non_kms_drivers[] = { 548 #ifdef CONFIG_DRM_EXYNOS_G2D 549 &g2d_driver, 550 #endif 551 #ifdef CONFIG_DRM_EXYNOS_FIMC 552 &fimc_driver, 553 #endif 554 #ifdef CONFIG_DRM_EXYNOS_ROTATOR 555 &rotator_driver, 556 #endif 557 #ifdef CONFIG_DRM_EXYNOS_GSC 558 &gsc_driver, 559 #endif 560 #ifdef CONFIG_DRM_EXYNOS_IPP 561 &ipp_driver, 562 #endif 563 }; 564 565 static int exynos_drm_platform_probe(struct platform_device *pdev) 566 { 567 struct component_match *match; 568 569 pdev->dev.coherent_dma_mask = DMA_BIT_MASK(32); 570 exynos_drm_driver.num_ioctls = ARRAY_SIZE(exynos_ioctls); 571 572 match = exynos_drm_match_add(&pdev->dev); 573 if (IS_ERR(match)) { 574 return PTR_ERR(match); 575 } 576 577 return component_master_add_with_match(&pdev->dev, &exynos_drm_ops, 578 match); 579 } 580 581 static int exynos_drm_platform_remove(struct platform_device *pdev) 582 { 583 component_master_del(&pdev->dev, &exynos_drm_ops); 584 return 0; 585 } 586 587 static const char * const strings[] = { 588 "samsung,exynos3", 589 "samsung,exynos4", 590 "samsung,exynos5", 591 "samsung,exynos7", 592 }; 593 594 static struct platform_driver exynos_drm_platform_driver = { 595 .probe = exynos_drm_platform_probe, 596 .remove = exynos_drm_platform_remove, 597 .driver = { 598 .name = "exynos-drm", 599 .pm = &exynos_drm_pm_ops, 600 }, 601 }; 602 603 static int exynos_drm_init(void) 604 { 605 bool is_exynos = false; 606 int ret, i, j; 607 608 /* 609 * Register device object only in case of Exynos SoC. 610 * 611 * Below codes resolves temporarily infinite loop issue incurred 612 * by Exynos drm driver when using multi-platform kernel. 613 * So these codes will be replaced with more generic way later. 614 */ 615 for (i = 0; i < ARRAY_SIZE(strings); i++) { 616 if (of_machine_is_compatible(strings[i])) { 617 is_exynos = true; 618 break; 619 } 620 } 621 622 if (!is_exynos) 623 return -ENODEV; 624 625 exynos_drm_pdev = platform_device_register_simple("exynos-drm", -1, 626 NULL, 0); 627 if (IS_ERR(exynos_drm_pdev)) 628 return PTR_ERR(exynos_drm_pdev); 629 630 ret = exynos_drm_probe_vidi(); 631 if (ret < 0) 632 goto err_unregister_pd; 633 634 for (i = 0; i < ARRAY_SIZE(exynos_drm_kms_drivers); ++i) { 635 ret = platform_driver_register(exynos_drm_kms_drivers[i]); 636 if (ret < 0) 637 goto err_unregister_kms_drivers; 638 } 639 640 for (j = 0; j < ARRAY_SIZE(exynos_drm_non_kms_drivers); ++j) { 641 ret = platform_driver_register(exynos_drm_non_kms_drivers[j]); 642 if (ret < 0) 643 goto err_unregister_non_kms_drivers; 644 } 645 646 #ifdef CONFIG_DRM_EXYNOS_IPP 647 ret = exynos_platform_device_ipp_register(); 648 if (ret < 0) 649 goto err_unregister_non_kms_drivers; 650 #endif 651 652 ret = platform_driver_register(&exynos_drm_platform_driver); 653 if (ret) 654 goto err_unregister_resources; 655 656 return 0; 657 658 err_unregister_resources: 659 #ifdef CONFIG_DRM_EXYNOS_IPP 660 exynos_platform_device_ipp_unregister(); 661 #endif 662 663 err_unregister_non_kms_drivers: 664 while (--j >= 0) 665 platform_driver_unregister(exynos_drm_non_kms_drivers[j]); 666 667 err_unregister_kms_drivers: 668 while (--i >= 0) 669 platform_driver_unregister(exynos_drm_kms_drivers[i]); 670 671 exynos_drm_remove_vidi(); 672 673 err_unregister_pd: 674 platform_device_unregister(exynos_drm_pdev); 675 676 return ret; 677 } 678 679 static void exynos_drm_exit(void) 680 { 681 int i; 682 683 #ifdef CONFIG_DRM_EXYNOS_IPP 684 exynos_platform_device_ipp_unregister(); 685 #endif 686 687 for (i = ARRAY_SIZE(exynos_drm_non_kms_drivers) - 1; i >= 0; --i) 688 platform_driver_unregister(exynos_drm_non_kms_drivers[i]); 689 690 for (i = ARRAY_SIZE(exynos_drm_kms_drivers) - 1; i >= 0; --i) 691 platform_driver_unregister(exynos_drm_kms_drivers[i]); 692 693 platform_driver_unregister(&exynos_drm_platform_driver); 694 695 exynos_drm_remove_vidi(); 696 697 platform_device_unregister(exynos_drm_pdev); 698 } 699 700 module_init(exynos_drm_init); 701 module_exit(exynos_drm_exit); 702 703 MODULE_AUTHOR("Inki Dae <inki.dae@samsung.com>"); 704 MODULE_AUTHOR("Joonyoung Shim <jy0922.shim@samsung.com>"); 705 MODULE_AUTHOR("Seung-Woo Kim <sw0312.kim@samsung.com>"); 706 MODULE_DESCRIPTION("Samsung SoC DRM Driver"); 707 MODULE_LICENSE("GPL"); 708