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); 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 int exynos_drm_load(struct drm_device *dev, unsigned long flags) 134 { 135 struct exynos_drm_private *private; 136 struct drm_encoder *encoder; 137 unsigned int clone_mask; 138 int cnt, ret; 139 140 private = kzalloc(sizeof(struct exynos_drm_private), GFP_KERNEL); 141 if (!private) 142 return -ENOMEM; 143 144 init_waitqueue_head(&private->wait); 145 spin_lock_init(&private->lock); 146 147 dev_set_drvdata(dev->dev, dev); 148 dev->dev_private = (void *)private; 149 150 /* 151 * create mapping to manage iommu table and set a pointer to iommu 152 * mapping structure to iommu_mapping of private data. 153 * also this iommu_mapping can be used to check if iommu is supported 154 * or not. 155 */ 156 ret = drm_create_iommu_mapping(dev); 157 if (ret < 0) { 158 DRM_ERROR("failed to create iommu mapping.\n"); 159 goto err_free_private; 160 } 161 162 drm_mode_config_init(dev); 163 164 exynos_drm_mode_config_init(dev); 165 166 /* setup possible_clones. */ 167 cnt = 0; 168 clone_mask = 0; 169 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) 170 clone_mask |= (1 << (cnt++)); 171 172 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) 173 encoder->possible_clones = clone_mask; 174 175 platform_set_drvdata(dev->platformdev, dev); 176 177 /* Try to bind all sub drivers. */ 178 ret = component_bind_all(dev->dev, dev); 179 if (ret) 180 goto err_mode_config_cleanup; 181 182 ret = drm_vblank_init(dev, dev->mode_config.num_crtc); 183 if (ret) 184 goto err_unbind_all; 185 186 /* Probe non kms sub drivers and virtual display driver. */ 187 ret = exynos_drm_device_subdrv_probe(dev); 188 if (ret) 189 goto err_cleanup_vblank; 190 191 drm_mode_config_reset(dev); 192 193 /* 194 * enable drm irq mode. 195 * - with irq_enabled = true, we can use the vblank feature. 196 * 197 * P.S. note that we wouldn't use drm irq handler but 198 * just specific driver own one instead because 199 * drm framework supports only one irq handler. 200 */ 201 dev->irq_enabled = true; 202 203 /* 204 * with vblank_disable_allowed = true, vblank interrupt will be disabled 205 * by drm timer once a current process gives up ownership of 206 * vblank event.(after drm_vblank_put function is called) 207 */ 208 dev->vblank_disable_allowed = 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 async) 262 { 263 struct exynos_drm_private *priv = dev->dev_private; 264 struct exynos_atomic_commit *commit; 265 int i, ret; 266 267 commit = kzalloc(sizeof(*commit), GFP_KERNEL); 268 if (!commit) 269 return -ENOMEM; 270 271 ret = drm_atomic_helper_prepare_planes(dev, state); 272 if (ret) { 273 kfree(commit); 274 return ret; 275 } 276 277 /* This is the point of no return */ 278 279 INIT_WORK(&commit->work, exynos_drm_atomic_work); 280 commit->dev = dev; 281 commit->state = state; 282 283 /* Wait until all affected CRTCs have completed previous commits and 284 * mark them as pending. 285 */ 286 for (i = 0; i < dev->mode_config.num_crtc; ++i) { 287 if (state->crtcs[i]) 288 commit->crtcs |= 1 << drm_crtc_index(state->crtcs[i]); 289 } 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(dev, state); 298 299 if (async) 300 schedule_work(&commit->work); 301 else 302 exynos_atomic_commit_complete(commit); 303 304 return 0; 305 } 306 307 static int exynos_drm_suspend(struct drm_device *dev, pm_message_t state) 308 { 309 struct drm_connector *connector; 310 311 drm_modeset_lock_all(dev); 312 list_for_each_entry(connector, &dev->mode_config.connector_list, head) { 313 int old_dpms = connector->dpms; 314 315 if (connector->funcs->dpms) 316 connector->funcs->dpms(connector, DRM_MODE_DPMS_OFF); 317 318 /* Set the old mode back to the connector for resume */ 319 connector->dpms = old_dpms; 320 } 321 drm_modeset_unlock_all(dev); 322 323 return 0; 324 } 325 326 static int exynos_drm_resume(struct drm_device *dev) 327 { 328 struct drm_connector *connector; 329 330 drm_modeset_lock_all(dev); 331 list_for_each_entry(connector, &dev->mode_config.connector_list, head) { 332 if (connector->funcs->dpms) { 333 int dpms = connector->dpms; 334 335 connector->dpms = DRM_MODE_DPMS_OFF; 336 connector->funcs->dpms(connector, dpms); 337 } 338 } 339 drm_modeset_unlock_all(dev); 340 341 return 0; 342 } 343 344 static int exynos_drm_open(struct drm_device *dev, struct drm_file *file) 345 { 346 struct drm_exynos_file_private *file_priv; 347 int ret; 348 349 file_priv = kzalloc(sizeof(*file_priv), GFP_KERNEL); 350 if (!file_priv) 351 return -ENOMEM; 352 353 file->driver_priv = file_priv; 354 355 ret = exynos_drm_subdrv_open(dev, file); 356 if (ret) 357 goto err_file_priv_free; 358 359 return ret; 360 361 err_file_priv_free: 362 kfree(file_priv); 363 file->driver_priv = NULL; 364 return ret; 365 } 366 367 static void exynos_drm_preclose(struct drm_device *dev, 368 struct drm_file *file) 369 { 370 exynos_drm_subdrv_close(dev, file); 371 } 372 373 static void exynos_drm_postclose(struct drm_device *dev, struct drm_file *file) 374 { 375 struct drm_pending_event *e, *et; 376 unsigned long flags; 377 378 if (!file->driver_priv) 379 return; 380 381 spin_lock_irqsave(&dev->event_lock, flags); 382 /* Release all events handled by page flip handler but not freed. */ 383 list_for_each_entry_safe(e, et, &file->event_list, link) { 384 list_del(&e->link); 385 e->destroy(e); 386 } 387 spin_unlock_irqrestore(&dev->event_lock, flags); 388 389 kfree(file->driver_priv); 390 file->driver_priv = NULL; 391 } 392 393 static void exynos_drm_lastclose(struct drm_device *dev) 394 { 395 exynos_drm_fbdev_restore_mode(dev); 396 } 397 398 static const struct vm_operations_struct exynos_drm_gem_vm_ops = { 399 .fault = exynos_drm_gem_fault, 400 .open = drm_gem_vm_open, 401 .close = drm_gem_vm_close, 402 }; 403 404 static const struct drm_ioctl_desc exynos_ioctls[] = { 405 DRM_IOCTL_DEF_DRV(EXYNOS_GEM_CREATE, exynos_drm_gem_create_ioctl, 406 DRM_UNLOCKED | DRM_AUTH | DRM_RENDER_ALLOW), 407 DRM_IOCTL_DEF_DRV(EXYNOS_GEM_GET, exynos_drm_gem_get_ioctl, 408 DRM_UNLOCKED | DRM_RENDER_ALLOW), 409 DRM_IOCTL_DEF_DRV(EXYNOS_VIDI_CONNECTION, vidi_connection_ioctl, 410 DRM_UNLOCKED | DRM_AUTH), 411 DRM_IOCTL_DEF_DRV(EXYNOS_G2D_GET_VER, exynos_g2d_get_ver_ioctl, 412 DRM_UNLOCKED | DRM_AUTH | DRM_RENDER_ALLOW), 413 DRM_IOCTL_DEF_DRV(EXYNOS_G2D_SET_CMDLIST, exynos_g2d_set_cmdlist_ioctl, 414 DRM_UNLOCKED | DRM_AUTH | DRM_RENDER_ALLOW), 415 DRM_IOCTL_DEF_DRV(EXYNOS_G2D_EXEC, exynos_g2d_exec_ioctl, 416 DRM_UNLOCKED | DRM_AUTH | DRM_RENDER_ALLOW), 417 DRM_IOCTL_DEF_DRV(EXYNOS_IPP_GET_PROPERTY, exynos_drm_ipp_get_property, 418 DRM_UNLOCKED | DRM_AUTH | DRM_RENDER_ALLOW), 419 DRM_IOCTL_DEF_DRV(EXYNOS_IPP_SET_PROPERTY, exynos_drm_ipp_set_property, 420 DRM_UNLOCKED | DRM_AUTH | DRM_RENDER_ALLOW), 421 DRM_IOCTL_DEF_DRV(EXYNOS_IPP_QUEUE_BUF, exynos_drm_ipp_queue_buf, 422 DRM_UNLOCKED | DRM_AUTH | DRM_RENDER_ALLOW), 423 DRM_IOCTL_DEF_DRV(EXYNOS_IPP_CMD_CTRL, exynos_drm_ipp_cmd_ctrl, 424 DRM_UNLOCKED | DRM_AUTH | DRM_RENDER_ALLOW), 425 }; 426 427 static const struct file_operations exynos_drm_driver_fops = { 428 .owner = THIS_MODULE, 429 .open = drm_open, 430 .mmap = exynos_drm_gem_mmap, 431 .poll = drm_poll, 432 .read = drm_read, 433 .unlocked_ioctl = drm_ioctl, 434 #ifdef CONFIG_COMPAT 435 .compat_ioctl = drm_compat_ioctl, 436 #endif 437 .release = drm_release, 438 }; 439 440 static struct drm_driver exynos_drm_driver = { 441 .driver_features = DRIVER_MODESET | DRIVER_GEM | DRIVER_PRIME 442 | DRIVER_ATOMIC | DRIVER_RENDER, 443 .load = exynos_drm_load, 444 .unload = exynos_drm_unload, 445 .open = exynos_drm_open, 446 .preclose = exynos_drm_preclose, 447 .lastclose = exynos_drm_lastclose, 448 .postclose = exynos_drm_postclose, 449 .set_busid = drm_platform_set_busid, 450 .get_vblank_counter = drm_vblank_count, 451 .enable_vblank = exynos_drm_crtc_enable_vblank, 452 .disable_vblank = exynos_drm_crtc_disable_vblank, 453 .gem_free_object = exynos_drm_gem_free_object, 454 .gem_vm_ops = &exynos_drm_gem_vm_ops, 455 .dumb_create = exynos_drm_gem_dumb_create, 456 .dumb_map_offset = exynos_drm_gem_dumb_map_offset, 457 .dumb_destroy = drm_gem_dumb_destroy, 458 .prime_handle_to_fd = drm_gem_prime_handle_to_fd, 459 .prime_fd_to_handle = drm_gem_prime_fd_to_handle, 460 .gem_prime_export = drm_gem_prime_export, 461 .gem_prime_import = drm_gem_prime_import, 462 .gem_prime_get_sg_table = exynos_drm_gem_prime_get_sg_table, 463 .gem_prime_import_sg_table = exynos_drm_gem_prime_import_sg_table, 464 .gem_prime_vmap = exynos_drm_gem_prime_vmap, 465 .gem_prime_vunmap = exynos_drm_gem_prime_vunmap, 466 .ioctls = exynos_ioctls, 467 .num_ioctls = ARRAY_SIZE(exynos_ioctls), 468 .fops = &exynos_drm_driver_fops, 469 .name = DRIVER_NAME, 470 .desc = DRIVER_DESC, 471 .date = DRIVER_DATE, 472 .major = DRIVER_MAJOR, 473 .minor = DRIVER_MINOR, 474 }; 475 476 #ifdef CONFIG_PM_SLEEP 477 static int exynos_drm_sys_suspend(struct device *dev) 478 { 479 struct drm_device *drm_dev = dev_get_drvdata(dev); 480 pm_message_t message; 481 482 if (pm_runtime_suspended(dev) || !drm_dev) 483 return 0; 484 485 message.event = PM_EVENT_SUSPEND; 486 return exynos_drm_suspend(drm_dev, message); 487 } 488 489 static int exynos_drm_sys_resume(struct device *dev) 490 { 491 struct drm_device *drm_dev = dev_get_drvdata(dev); 492 493 if (pm_runtime_suspended(dev) || !drm_dev) 494 return 0; 495 496 return exynos_drm_resume(drm_dev); 497 } 498 #endif 499 500 static const struct dev_pm_ops exynos_drm_pm_ops = { 501 SET_SYSTEM_SLEEP_PM_OPS(exynos_drm_sys_suspend, exynos_drm_sys_resume) 502 }; 503 504 /* forward declaration */ 505 static struct platform_driver exynos_drm_platform_driver; 506 507 /* 508 * Connector drivers should not be placed before associated crtc drivers, 509 * because connector requires pipe number of its crtc during initialization. 510 */ 511 static struct platform_driver *const exynos_drm_kms_drivers[] = { 512 #ifdef CONFIG_DRM_EXYNOS_FIMD 513 &fimd_driver, 514 #endif 515 #ifdef CONFIG_DRM_EXYNOS5433_DECON 516 &exynos5433_decon_driver, 517 #endif 518 #ifdef CONFIG_DRM_EXYNOS7_DECON 519 &decon_driver, 520 #endif 521 #ifdef CONFIG_DRM_EXYNOS_MIC 522 &mic_driver, 523 #endif 524 #ifdef CONFIG_DRM_EXYNOS_DP 525 &dp_driver, 526 #endif 527 #ifdef CONFIG_DRM_EXYNOS_DSI 528 &dsi_driver, 529 #endif 530 #ifdef CONFIG_DRM_EXYNOS_HDMI 531 &mixer_driver, 532 &hdmi_driver, 533 #endif 534 #ifdef CONFIG_DRM_EXYNOS_VIDI 535 &vidi_driver, 536 #endif 537 }; 538 539 static struct platform_driver *const exynos_drm_non_kms_drivers[] = { 540 #ifdef CONFIG_DRM_EXYNOS_G2D 541 &g2d_driver, 542 #endif 543 #ifdef CONFIG_DRM_EXYNOS_FIMC 544 &fimc_driver, 545 #endif 546 #ifdef CONFIG_DRM_EXYNOS_ROTATOR 547 &rotator_driver, 548 #endif 549 #ifdef CONFIG_DRM_EXYNOS_GSC 550 &gsc_driver, 551 #endif 552 #ifdef CONFIG_DRM_EXYNOS_IPP 553 &ipp_driver, 554 #endif 555 &exynos_drm_platform_driver, 556 }; 557 558 static struct platform_driver *const exynos_drm_drv_with_simple_dev[] = { 559 #ifdef CONFIG_DRM_EXYNOS_VIDI 560 &vidi_driver, 561 #endif 562 #ifdef CONFIG_DRM_EXYNOS_IPP 563 &ipp_driver, 564 #endif 565 &exynos_drm_platform_driver, 566 }; 567 #define PDEV_COUNT ARRAY_SIZE(exynos_drm_drv_with_simple_dev) 568 569 static int compare_dev(struct device *dev, void *data) 570 { 571 return dev == (struct device *)data; 572 } 573 574 static struct component_match *exynos_drm_match_add(struct device *dev) 575 { 576 struct component_match *match = NULL; 577 int i; 578 579 for (i = 0; i < ARRAY_SIZE(exynos_drm_kms_drivers); ++i) { 580 struct device_driver *drv = &exynos_drm_kms_drivers[i]->driver; 581 struct device *p = NULL, *d; 582 583 while ((d = bus_find_device(&platform_bus_type, p, drv, 584 (void *)platform_bus_type.match))) { 585 put_device(p); 586 component_match_add(dev, &match, compare_dev, d); 587 p = d; 588 } 589 put_device(p); 590 } 591 592 return match ?: ERR_PTR(-ENODEV); 593 } 594 595 static int exynos_drm_bind(struct device *dev) 596 { 597 return drm_platform_init(&exynos_drm_driver, to_platform_device(dev)); 598 } 599 600 static void exynos_drm_unbind(struct device *dev) 601 { 602 drm_put_dev(dev_get_drvdata(dev)); 603 } 604 605 static const struct component_master_ops exynos_drm_ops = { 606 .bind = exynos_drm_bind, 607 .unbind = exynos_drm_unbind, 608 }; 609 610 static int exynos_drm_platform_probe(struct platform_device *pdev) 611 { 612 struct component_match *match; 613 614 pdev->dev.coherent_dma_mask = DMA_BIT_MASK(32); 615 exynos_drm_driver.num_ioctls = ARRAY_SIZE(exynos_ioctls); 616 617 match = exynos_drm_match_add(&pdev->dev); 618 if (IS_ERR(match)) 619 return PTR_ERR(match); 620 621 return component_master_add_with_match(&pdev->dev, &exynos_drm_ops, 622 match); 623 } 624 625 static int exynos_drm_platform_remove(struct platform_device *pdev) 626 { 627 component_master_del(&pdev->dev, &exynos_drm_ops); 628 return 0; 629 } 630 631 static struct platform_driver exynos_drm_platform_driver = { 632 .probe = exynos_drm_platform_probe, 633 .remove = exynos_drm_platform_remove, 634 .driver = { 635 .name = "exynos-drm", 636 .pm = &exynos_drm_pm_ops, 637 }, 638 }; 639 640 static struct platform_device *exynos_drm_pdevs[PDEV_COUNT]; 641 642 static void exynos_drm_unregister_devices(void) 643 { 644 int i = PDEV_COUNT; 645 646 while (--i >= 0) { 647 platform_device_unregister(exynos_drm_pdevs[i]); 648 exynos_drm_pdevs[i] = NULL; 649 } 650 } 651 652 static int exynos_drm_register_devices(void) 653 { 654 int i; 655 656 for (i = 0; i < PDEV_COUNT; ++i) { 657 struct platform_driver *d = exynos_drm_drv_with_simple_dev[i]; 658 struct platform_device *pdev = 659 platform_device_register_simple(d->driver.name, -1, 660 NULL, 0); 661 662 if (!IS_ERR(pdev)) { 663 exynos_drm_pdevs[i] = pdev; 664 continue; 665 } 666 while (--i >= 0) { 667 platform_device_unregister(exynos_drm_pdevs[i]); 668 exynos_drm_pdevs[i] = NULL; 669 } 670 671 return PTR_ERR(pdev); 672 } 673 674 return 0; 675 } 676 677 static void exynos_drm_unregister_drivers(struct platform_driver * const *drv, 678 int count) 679 { 680 while (--count >= 0) 681 platform_driver_unregister(drv[count]); 682 } 683 684 static int exynos_drm_register_drivers(struct platform_driver * const *drv, 685 int count) 686 { 687 int i, ret; 688 689 for (i = 0; i < count; ++i) { 690 ret = platform_driver_register(drv[i]); 691 if (!ret) 692 continue; 693 694 while (--i >= 0) 695 platform_driver_unregister(drv[i]); 696 697 return ret; 698 } 699 700 return 0; 701 } 702 703 static inline int exynos_drm_register_kms_drivers(void) 704 { 705 return exynos_drm_register_drivers(exynos_drm_kms_drivers, 706 ARRAY_SIZE(exynos_drm_kms_drivers)); 707 } 708 709 static inline int exynos_drm_register_non_kms_drivers(void) 710 { 711 return exynos_drm_register_drivers(exynos_drm_non_kms_drivers, 712 ARRAY_SIZE(exynos_drm_non_kms_drivers)); 713 } 714 715 static inline void exynos_drm_unregister_kms_drivers(void) 716 { 717 exynos_drm_unregister_drivers(exynos_drm_kms_drivers, 718 ARRAY_SIZE(exynos_drm_kms_drivers)); 719 } 720 721 static inline void exynos_drm_unregister_non_kms_drivers(void) 722 { 723 exynos_drm_unregister_drivers(exynos_drm_non_kms_drivers, 724 ARRAY_SIZE(exynos_drm_non_kms_drivers)); 725 } 726 727 static int exynos_drm_init(void) 728 { 729 int ret; 730 731 ret = exynos_drm_register_devices(); 732 if (ret) 733 return ret; 734 735 ret = exynos_drm_register_kms_drivers(); 736 if (ret) 737 goto err_unregister_pdevs; 738 739 ret = exynos_drm_register_non_kms_drivers(); 740 if (ret) 741 goto err_unregister_kms_drivers; 742 743 return 0; 744 745 err_unregister_kms_drivers: 746 exynos_drm_unregister_kms_drivers(); 747 748 err_unregister_pdevs: 749 exynos_drm_unregister_devices(); 750 751 return ret; 752 } 753 754 static void exynos_drm_exit(void) 755 { 756 exynos_drm_unregister_non_kms_drivers(); 757 exynos_drm_unregister_kms_drivers(); 758 exynos_drm_unregister_devices(); 759 } 760 761 module_init(exynos_drm_init); 762 module_exit(exynos_drm_exit); 763 764 MODULE_AUTHOR("Inki Dae <inki.dae@samsung.com>"); 765 MODULE_AUTHOR("Joonyoung Shim <jy0922.shim@samsung.com>"); 766 MODULE_AUTHOR("Seung-Woo Kim <sw0312.kim@samsung.com>"); 767 MODULE_DESCRIPTION("Samsung SoC DRM Driver"); 768 MODULE_LICENSE("GPL"); 769