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 20 #include <linux/component.h> 21 22 #include <drm/exynos_drm.h> 23 24 #include "exynos_drm_drv.h" 25 #include "exynos_drm_crtc.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_vidi.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 struct exynos_atomic_commit { 42 struct work_struct work; 43 struct drm_device *dev; 44 struct drm_atomic_state *state; 45 u32 crtcs; 46 }; 47 48 static void exynos_atomic_wait_for_commit(struct drm_atomic_state *state) 49 { 50 struct drm_crtc_state *crtc_state; 51 struct drm_crtc *crtc; 52 int i, ret; 53 54 for_each_crtc_in_state(state, crtc, crtc_state, i) { 55 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc); 56 57 if (!crtc->state->enable) 58 continue; 59 60 ret = drm_crtc_vblank_get(crtc); 61 if (ret) 62 continue; 63 64 exynos_drm_crtc_wait_pending_update(exynos_crtc); 65 drm_crtc_vblank_put(crtc); 66 } 67 } 68 69 static void exynos_atomic_commit_complete(struct exynos_atomic_commit *commit) 70 { 71 struct drm_device *dev = commit->dev; 72 struct exynos_drm_private *priv = dev->dev_private; 73 struct drm_atomic_state *state = commit->state; 74 struct drm_plane *plane; 75 struct drm_crtc *crtc; 76 struct drm_plane_state *plane_state; 77 struct drm_crtc_state *crtc_state; 78 int i; 79 80 drm_atomic_helper_commit_modeset_disables(dev, state); 81 82 drm_atomic_helper_commit_modeset_enables(dev, state); 83 84 /* 85 * Exynos can't update planes with CRTCs and encoders disabled, 86 * its updates routines, specially for FIMD, requires the clocks 87 * to be enabled. So it is necessary to handle the modeset operations 88 * *before* the commit_planes() step, this way it will always 89 * have the relevant clocks enabled to perform the update. 90 */ 91 92 for_each_crtc_in_state(state, crtc, crtc_state, i) { 93 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc); 94 95 atomic_set(&exynos_crtc->pending_update, 0); 96 } 97 98 for_each_plane_in_state(state, plane, plane_state, i) { 99 struct exynos_drm_crtc *exynos_crtc = 100 to_exynos_crtc(plane->crtc); 101 102 if (!plane->crtc) 103 continue; 104 105 atomic_inc(&exynos_crtc->pending_update); 106 } 107 108 drm_atomic_helper_commit_planes(dev, state, false); 109 110 exynos_atomic_wait_for_commit(state); 111 112 drm_atomic_helper_cleanup_planes(dev, state); 113 114 drm_atomic_state_free(state); 115 116 spin_lock(&priv->lock); 117 priv->pending &= ~commit->crtcs; 118 spin_unlock(&priv->lock); 119 120 wake_up_all(&priv->wait); 121 122 kfree(commit); 123 } 124 125 static void exynos_drm_atomic_work(struct work_struct *work) 126 { 127 struct exynos_atomic_commit *commit = container_of(work, 128 struct exynos_atomic_commit, work); 129 130 exynos_atomic_commit_complete(commit); 131 } 132 133 static struct device *exynos_drm_get_dma_device(void); 134 135 static int exynos_drm_load(struct drm_device *dev, unsigned long flags) 136 { 137 struct exynos_drm_private *private; 138 struct drm_encoder *encoder; 139 unsigned int clone_mask; 140 int cnt, ret; 141 142 private = kzalloc(sizeof(struct exynos_drm_private), GFP_KERNEL); 143 if (!private) 144 return -ENOMEM; 145 146 init_waitqueue_head(&private->wait); 147 spin_lock_init(&private->lock); 148 149 dev_set_drvdata(dev->dev, dev); 150 dev->dev_private = (void *)private; 151 152 /* the first real CRTC device is used for all dma mapping operations */ 153 private->dma_dev = exynos_drm_get_dma_device(); 154 if (!private->dma_dev) { 155 DRM_ERROR("no device found for DMA mapping operations.\n"); 156 ret = -ENODEV; 157 goto err_free_private; 158 } 159 DRM_INFO("Exynos DRM: using %s device for DMA mapping operations\n", 160 dev_name(private->dma_dev)); 161 162 /* create common IOMMU mapping for all devices attached to Exynos DRM */ 163 ret = drm_create_iommu_mapping(dev); 164 if (ret < 0) { 165 DRM_ERROR("failed to create iommu mapping.\n"); 166 goto err_free_private; 167 } 168 169 drm_mode_config_init(dev); 170 171 exynos_drm_mode_config_init(dev); 172 173 /* setup possible_clones. */ 174 cnt = 0; 175 clone_mask = 0; 176 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) 177 clone_mask |= (1 << (cnt++)); 178 179 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) 180 encoder->possible_clones = clone_mask; 181 182 platform_set_drvdata(dev->platformdev, dev); 183 184 /* Try to bind all sub drivers. */ 185 ret = component_bind_all(dev->dev, dev); 186 if (ret) 187 goto err_mode_config_cleanup; 188 189 ret = drm_vblank_init(dev, dev->mode_config.num_crtc); 190 if (ret) 191 goto err_unbind_all; 192 193 /* Probe non kms sub drivers and virtual display driver. */ 194 ret = exynos_drm_device_subdrv_probe(dev); 195 if (ret) 196 goto err_cleanup_vblank; 197 198 drm_mode_config_reset(dev); 199 200 /* 201 * enable drm irq mode. 202 * - with irq_enabled = true, we can use the vblank feature. 203 * 204 * P.S. note that we wouldn't use drm irq handler but 205 * just specific driver own one instead because 206 * drm framework supports only one irq handler. 207 */ 208 dev->irq_enabled = true; 209 210 /* init kms poll for handling hpd */ 211 drm_kms_helper_poll_init(dev); 212 213 /* force connectors detection */ 214 drm_helper_hpd_irq_event(dev); 215 216 return 0; 217 218 err_cleanup_vblank: 219 drm_vblank_cleanup(dev); 220 err_unbind_all: 221 component_unbind_all(dev->dev, dev); 222 err_mode_config_cleanup: 223 drm_mode_config_cleanup(dev); 224 drm_release_iommu_mapping(dev); 225 err_free_private: 226 kfree(private); 227 228 return ret; 229 } 230 231 static int exynos_drm_unload(struct drm_device *dev) 232 { 233 exynos_drm_device_subdrv_remove(dev); 234 235 exynos_drm_fbdev_fini(dev); 236 drm_kms_helper_poll_fini(dev); 237 238 drm_vblank_cleanup(dev); 239 component_unbind_all(dev->dev, dev); 240 drm_mode_config_cleanup(dev); 241 drm_release_iommu_mapping(dev); 242 243 kfree(dev->dev_private); 244 dev->dev_private = NULL; 245 246 return 0; 247 } 248 249 static int commit_is_pending(struct exynos_drm_private *priv, u32 crtcs) 250 { 251 bool pending; 252 253 spin_lock(&priv->lock); 254 pending = priv->pending & crtcs; 255 spin_unlock(&priv->lock); 256 257 return pending; 258 } 259 260 int exynos_atomic_commit(struct drm_device *dev, struct drm_atomic_state *state, 261 bool nonblock) 262 { 263 struct exynos_drm_private *priv = dev->dev_private; 264 struct exynos_atomic_commit *commit; 265 struct drm_crtc *crtc; 266 struct drm_crtc_state *crtc_state; 267 int i, ret; 268 269 commit = kzalloc(sizeof(*commit), GFP_KERNEL); 270 if (!commit) 271 return -ENOMEM; 272 273 ret = drm_atomic_helper_prepare_planes(dev, state); 274 if (ret) { 275 kfree(commit); 276 return ret; 277 } 278 279 /* This is the point of no return */ 280 281 INIT_WORK(&commit->work, exynos_drm_atomic_work); 282 commit->dev = dev; 283 commit->state = state; 284 285 /* Wait until all affected CRTCs have completed previous commits and 286 * mark them as pending. 287 */ 288 for_each_crtc_in_state(state, crtc, crtc_state, i) 289 commit->crtcs |= drm_crtc_mask(crtc); 290 291 wait_event(priv->wait, !commit_is_pending(priv, commit->crtcs)); 292 293 spin_lock(&priv->lock); 294 priv->pending |= commit->crtcs; 295 spin_unlock(&priv->lock); 296 297 drm_atomic_helper_swap_state(state, true); 298 299 if (nonblock) 300 schedule_work(&commit->work); 301 else 302 exynos_atomic_commit_complete(commit); 303 304 return 0; 305 } 306 307 static int exynos_drm_open(struct drm_device *dev, struct drm_file *file) 308 { 309 struct drm_exynos_file_private *file_priv; 310 int ret; 311 312 file_priv = kzalloc(sizeof(*file_priv), GFP_KERNEL); 313 if (!file_priv) 314 return -ENOMEM; 315 316 file->driver_priv = file_priv; 317 318 ret = exynos_drm_subdrv_open(dev, file); 319 if (ret) 320 goto err_file_priv_free; 321 322 return ret; 323 324 err_file_priv_free: 325 kfree(file_priv); 326 file->driver_priv = NULL; 327 return ret; 328 } 329 330 static void exynos_drm_preclose(struct drm_device *dev, 331 struct drm_file *file) 332 { 333 struct drm_crtc *crtc; 334 335 exynos_drm_subdrv_close(dev, file); 336 337 list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) 338 exynos_drm_crtc_cancel_page_flip(crtc, file); 339 } 340 341 static void exynos_drm_postclose(struct drm_device *dev, struct drm_file *file) 342 { 343 kfree(file->driver_priv); 344 file->driver_priv = NULL; 345 } 346 347 static void exynos_drm_lastclose(struct drm_device *dev) 348 { 349 exynos_drm_fbdev_restore_mode(dev); 350 } 351 352 static const struct vm_operations_struct exynos_drm_gem_vm_ops = { 353 .fault = exynos_drm_gem_fault, 354 .open = drm_gem_vm_open, 355 .close = drm_gem_vm_close, 356 }; 357 358 static const struct drm_ioctl_desc exynos_ioctls[] = { 359 DRM_IOCTL_DEF_DRV(EXYNOS_GEM_CREATE, exynos_drm_gem_create_ioctl, 360 DRM_AUTH | DRM_RENDER_ALLOW), 361 DRM_IOCTL_DEF_DRV(EXYNOS_GEM_MAP, exynos_drm_gem_map_ioctl, 362 DRM_AUTH | DRM_RENDER_ALLOW), 363 DRM_IOCTL_DEF_DRV(EXYNOS_GEM_GET, exynos_drm_gem_get_ioctl, 364 DRM_RENDER_ALLOW), 365 DRM_IOCTL_DEF_DRV(EXYNOS_VIDI_CONNECTION, vidi_connection_ioctl, 366 DRM_AUTH), 367 DRM_IOCTL_DEF_DRV(EXYNOS_G2D_GET_VER, exynos_g2d_get_ver_ioctl, 368 DRM_AUTH | DRM_RENDER_ALLOW), 369 DRM_IOCTL_DEF_DRV(EXYNOS_G2D_SET_CMDLIST, exynos_g2d_set_cmdlist_ioctl, 370 DRM_AUTH | DRM_RENDER_ALLOW), 371 DRM_IOCTL_DEF_DRV(EXYNOS_G2D_EXEC, exynos_g2d_exec_ioctl, 372 DRM_AUTH | DRM_RENDER_ALLOW), 373 DRM_IOCTL_DEF_DRV(EXYNOS_IPP_GET_PROPERTY, exynos_drm_ipp_get_property, 374 DRM_AUTH | DRM_RENDER_ALLOW), 375 DRM_IOCTL_DEF_DRV(EXYNOS_IPP_SET_PROPERTY, exynos_drm_ipp_set_property, 376 DRM_AUTH | DRM_RENDER_ALLOW), 377 DRM_IOCTL_DEF_DRV(EXYNOS_IPP_QUEUE_BUF, exynos_drm_ipp_queue_buf, 378 DRM_AUTH | DRM_RENDER_ALLOW), 379 DRM_IOCTL_DEF_DRV(EXYNOS_IPP_CMD_CTRL, exynos_drm_ipp_cmd_ctrl, 380 DRM_AUTH | DRM_RENDER_ALLOW), 381 }; 382 383 static const struct file_operations exynos_drm_driver_fops = { 384 .owner = THIS_MODULE, 385 .open = drm_open, 386 .mmap = exynos_drm_gem_mmap, 387 .poll = drm_poll, 388 .read = drm_read, 389 .unlocked_ioctl = drm_ioctl, 390 #ifdef CONFIG_COMPAT 391 .compat_ioctl = drm_compat_ioctl, 392 #endif 393 .release = drm_release, 394 }; 395 396 static struct drm_driver exynos_drm_driver = { 397 .driver_features = DRIVER_MODESET | DRIVER_GEM | DRIVER_PRIME 398 | DRIVER_ATOMIC | DRIVER_RENDER, 399 .load = exynos_drm_load, 400 .unload = exynos_drm_unload, 401 .open = exynos_drm_open, 402 .preclose = exynos_drm_preclose, 403 .lastclose = exynos_drm_lastclose, 404 .postclose = exynos_drm_postclose, 405 .get_vblank_counter = drm_vblank_no_hw_counter, 406 .enable_vblank = exynos_drm_crtc_enable_vblank, 407 .disable_vblank = exynos_drm_crtc_disable_vblank, 408 .gem_free_object_unlocked = exynos_drm_gem_free_object, 409 .gem_vm_ops = &exynos_drm_gem_vm_ops, 410 .dumb_create = exynos_drm_gem_dumb_create, 411 .dumb_map_offset = exynos_drm_gem_dumb_map_offset, 412 .dumb_destroy = drm_gem_dumb_destroy, 413 .prime_handle_to_fd = drm_gem_prime_handle_to_fd, 414 .prime_fd_to_handle = drm_gem_prime_fd_to_handle, 415 .gem_prime_export = drm_gem_prime_export, 416 .gem_prime_import = drm_gem_prime_import, 417 .gem_prime_get_sg_table = exynos_drm_gem_prime_get_sg_table, 418 .gem_prime_import_sg_table = exynos_drm_gem_prime_import_sg_table, 419 .gem_prime_vmap = exynos_drm_gem_prime_vmap, 420 .gem_prime_vunmap = exynos_drm_gem_prime_vunmap, 421 .gem_prime_mmap = exynos_drm_gem_prime_mmap, 422 .ioctls = exynos_ioctls, 423 .num_ioctls = ARRAY_SIZE(exynos_ioctls), 424 .fops = &exynos_drm_driver_fops, 425 .name = DRIVER_NAME, 426 .desc = DRIVER_DESC, 427 .date = DRIVER_DATE, 428 .major = DRIVER_MAJOR, 429 .minor = DRIVER_MINOR, 430 }; 431 432 #ifdef CONFIG_PM_SLEEP 433 static int exynos_drm_suspend(struct device *dev) 434 { 435 struct drm_device *drm_dev = dev_get_drvdata(dev); 436 struct drm_connector *connector; 437 438 if (pm_runtime_suspended(dev) || !drm_dev) 439 return 0; 440 441 drm_modeset_lock_all(drm_dev); 442 drm_for_each_connector(connector, drm_dev) { 443 int old_dpms = connector->dpms; 444 445 if (connector->funcs->dpms) 446 connector->funcs->dpms(connector, DRM_MODE_DPMS_OFF); 447 448 /* Set the old mode back to the connector for resume */ 449 connector->dpms = old_dpms; 450 } 451 drm_modeset_unlock_all(drm_dev); 452 453 return 0; 454 } 455 456 static int exynos_drm_resume(struct device *dev) 457 { 458 struct drm_device *drm_dev = dev_get_drvdata(dev); 459 struct drm_connector *connector; 460 461 if (pm_runtime_suspended(dev) || !drm_dev) 462 return 0; 463 464 drm_modeset_lock_all(drm_dev); 465 drm_for_each_connector(connector, drm_dev) { 466 if (connector->funcs->dpms) { 467 int dpms = connector->dpms; 468 469 connector->dpms = DRM_MODE_DPMS_OFF; 470 connector->funcs->dpms(connector, dpms); 471 } 472 } 473 drm_modeset_unlock_all(drm_dev); 474 475 return 0; 476 } 477 #endif 478 479 static const struct dev_pm_ops exynos_drm_pm_ops = { 480 SET_SYSTEM_SLEEP_PM_OPS(exynos_drm_suspend, exynos_drm_resume) 481 }; 482 483 /* forward declaration */ 484 static struct platform_driver exynos_drm_platform_driver; 485 486 struct exynos_drm_driver_info { 487 struct platform_driver *driver; 488 unsigned int flags; 489 }; 490 491 #define DRM_COMPONENT_DRIVER BIT(0) /* supports component framework */ 492 #define DRM_VIRTUAL_DEVICE BIT(1) /* create virtual platform device */ 493 #define DRM_DMA_DEVICE BIT(2) /* can be used for dma allocations */ 494 495 #define DRV_PTR(drv, cond) (IS_ENABLED(cond) ? &drv : NULL) 496 497 /* 498 * Connector drivers should not be placed before associated crtc drivers, 499 * because connector requires pipe number of its crtc during initialization. 500 */ 501 static struct exynos_drm_driver_info exynos_drm_drivers[] = { 502 { 503 DRV_PTR(fimd_driver, CONFIG_DRM_EXYNOS_FIMD), 504 DRM_COMPONENT_DRIVER | DRM_DMA_DEVICE 505 }, { 506 DRV_PTR(exynos5433_decon_driver, CONFIG_DRM_EXYNOS5433_DECON), 507 DRM_COMPONENT_DRIVER | DRM_DMA_DEVICE 508 }, { 509 DRV_PTR(decon_driver, CONFIG_DRM_EXYNOS7_DECON), 510 DRM_COMPONENT_DRIVER | DRM_DMA_DEVICE 511 }, { 512 DRV_PTR(mixer_driver, CONFIG_DRM_EXYNOS_MIXER), 513 DRM_COMPONENT_DRIVER | DRM_DMA_DEVICE 514 }, { 515 DRV_PTR(mic_driver, CONFIG_DRM_EXYNOS_MIC), 516 DRM_COMPONENT_DRIVER 517 }, { 518 DRV_PTR(dp_driver, CONFIG_DRM_EXYNOS_DP), 519 DRM_COMPONENT_DRIVER 520 }, { 521 DRV_PTR(dsi_driver, CONFIG_DRM_EXYNOS_DSI), 522 DRM_COMPONENT_DRIVER 523 }, { 524 DRV_PTR(hdmi_driver, CONFIG_DRM_EXYNOS_HDMI), 525 DRM_COMPONENT_DRIVER 526 }, { 527 DRV_PTR(vidi_driver, CONFIG_DRM_EXYNOS_VIDI), 528 DRM_COMPONENT_DRIVER | DRM_VIRTUAL_DEVICE 529 }, { 530 DRV_PTR(g2d_driver, CONFIG_DRM_EXYNOS_G2D), 531 }, { 532 DRV_PTR(fimc_driver, CONFIG_DRM_EXYNOS_FIMC), 533 }, { 534 DRV_PTR(rotator_driver, CONFIG_DRM_EXYNOS_ROTATOR), 535 }, { 536 DRV_PTR(gsc_driver, CONFIG_DRM_EXYNOS_GSC), 537 }, { 538 DRV_PTR(ipp_driver, CONFIG_DRM_EXYNOS_IPP), 539 DRM_VIRTUAL_DEVICE 540 }, { 541 &exynos_drm_platform_driver, 542 DRM_VIRTUAL_DEVICE 543 } 544 }; 545 546 static int compare_dev(struct device *dev, void *data) 547 { 548 return dev == (struct device *)data; 549 } 550 551 static struct component_match *exynos_drm_match_add(struct device *dev) 552 { 553 struct component_match *match = NULL; 554 int i; 555 556 for (i = 0; i < ARRAY_SIZE(exynos_drm_drivers); ++i) { 557 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i]; 558 struct device *p = NULL, *d; 559 560 if (!info->driver || !(info->flags & DRM_COMPONENT_DRIVER)) 561 continue; 562 563 while ((d = bus_find_device(&platform_bus_type, p, 564 &info->driver->driver, 565 (void *)platform_bus_type.match))) { 566 put_device(p); 567 component_match_add(dev, &match, compare_dev, d); 568 p = d; 569 } 570 put_device(p); 571 } 572 573 return match ?: ERR_PTR(-ENODEV); 574 } 575 576 static int exynos_drm_bind(struct device *dev) 577 { 578 return drm_platform_init(&exynos_drm_driver, to_platform_device(dev)); 579 } 580 581 static void exynos_drm_unbind(struct device *dev) 582 { 583 drm_put_dev(dev_get_drvdata(dev)); 584 } 585 586 static const struct component_master_ops exynos_drm_ops = { 587 .bind = exynos_drm_bind, 588 .unbind = exynos_drm_unbind, 589 }; 590 591 static int exynos_drm_platform_probe(struct platform_device *pdev) 592 { 593 struct component_match *match; 594 595 pdev->dev.coherent_dma_mask = DMA_BIT_MASK(32); 596 exynos_drm_driver.num_ioctls = ARRAY_SIZE(exynos_ioctls); 597 598 match = exynos_drm_match_add(&pdev->dev); 599 if (IS_ERR(match)) 600 return PTR_ERR(match); 601 602 return component_master_add_with_match(&pdev->dev, &exynos_drm_ops, 603 match); 604 } 605 606 static int exynos_drm_platform_remove(struct platform_device *pdev) 607 { 608 component_master_del(&pdev->dev, &exynos_drm_ops); 609 return 0; 610 } 611 612 static struct platform_driver exynos_drm_platform_driver = { 613 .probe = exynos_drm_platform_probe, 614 .remove = exynos_drm_platform_remove, 615 .driver = { 616 .name = "exynos-drm", 617 .pm = &exynos_drm_pm_ops, 618 }, 619 }; 620 621 static struct device *exynos_drm_get_dma_device(void) 622 { 623 int i; 624 625 for (i = 0; i < ARRAY_SIZE(exynos_drm_drivers); ++i) { 626 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i]; 627 struct device *dev; 628 629 if (!info->driver || !(info->flags & DRM_DMA_DEVICE)) 630 continue; 631 632 while ((dev = bus_find_device(&platform_bus_type, NULL, 633 &info->driver->driver, 634 (void *)platform_bus_type.match))) { 635 put_device(dev); 636 return dev; 637 } 638 } 639 return NULL; 640 } 641 642 static void exynos_drm_unregister_devices(void) 643 { 644 int i; 645 646 for (i = ARRAY_SIZE(exynos_drm_drivers) - 1; i >= 0; --i) { 647 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i]; 648 struct device *dev; 649 650 if (!info->driver || !(info->flags & DRM_VIRTUAL_DEVICE)) 651 continue; 652 653 while ((dev = bus_find_device(&platform_bus_type, NULL, 654 &info->driver->driver, 655 (void *)platform_bus_type.match))) { 656 put_device(dev); 657 platform_device_unregister(to_platform_device(dev)); 658 } 659 } 660 } 661 662 static int exynos_drm_register_devices(void) 663 { 664 struct platform_device *pdev; 665 int i; 666 667 for (i = 0; i < ARRAY_SIZE(exynos_drm_drivers); ++i) { 668 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i]; 669 670 if (!info->driver || !(info->flags & DRM_VIRTUAL_DEVICE)) 671 continue; 672 673 pdev = platform_device_register_simple( 674 info->driver->driver.name, -1, NULL, 0); 675 if (IS_ERR(pdev)) 676 goto fail; 677 } 678 679 return 0; 680 fail: 681 exynos_drm_unregister_devices(); 682 return PTR_ERR(pdev); 683 } 684 685 static void exynos_drm_unregister_drivers(void) 686 { 687 int i; 688 689 for (i = ARRAY_SIZE(exynos_drm_drivers) - 1; i >= 0; --i) { 690 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i]; 691 692 if (!info->driver) 693 continue; 694 695 platform_driver_unregister(info->driver); 696 } 697 } 698 699 static int exynos_drm_register_drivers(void) 700 { 701 int i, ret; 702 703 for (i = 0; i < ARRAY_SIZE(exynos_drm_drivers); ++i) { 704 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i]; 705 706 if (!info->driver) 707 continue; 708 709 ret = platform_driver_register(info->driver); 710 if (ret) 711 goto fail; 712 } 713 return 0; 714 fail: 715 exynos_drm_unregister_drivers(); 716 return ret; 717 } 718 719 static int exynos_drm_init(void) 720 { 721 int ret; 722 723 ret = exynos_drm_register_devices(); 724 if (ret) 725 return ret; 726 727 ret = exynos_drm_register_drivers(); 728 if (ret) 729 goto err_unregister_pdevs; 730 731 return 0; 732 733 err_unregister_pdevs: 734 exynos_drm_unregister_devices(); 735 736 return ret; 737 } 738 739 static void exynos_drm_exit(void) 740 { 741 exynos_drm_unregister_drivers(); 742 exynos_drm_unregister_devices(); 743 } 744 745 module_init(exynos_drm_init); 746 module_exit(exynos_drm_exit); 747 748 MODULE_AUTHOR("Inki Dae <inki.dae@samsung.com>"); 749 MODULE_AUTHOR("Joonyoung Shim <jy0922.shim@samsung.com>"); 750 MODULE_AUTHOR("Seung-Woo Kim <sw0312.kim@samsung.com>"); 751 MODULE_DESCRIPTION("Samsung SoC DRM Driver"); 752 MODULE_LICENSE("GPL"); 753