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