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         struct drm_crtc *crtc;
 271         struct drm_crtc_state *crtc_state;
 272         int i, ret;
 273
 274         commit = kzalloc(sizeof(*commit), GFP_KERNEL);
 275         if (!commit)
 276                 return -ENOMEM;
 277
 278         ret = drm_atomic_helper_prepare_planes(dev, state);
 279         if (ret) {
 280                 kfree(commit);
 281                 return ret;
 282         }
 283
 284         /* This is the point of no return */
 285
 286         INIT_WORK(&commit->work, exynos_drm_atomic_work);
 287         commit->dev = dev;
 288         commit->state = state;
 289
 290         /* Wait until all affected CRTCs have completed previous commits and
 291          * mark them as pending.
 292          */
 293         for_each_crtc_in_state(state, crtc, crtc_state, i)
 294                 commit->crtcs |= drm_crtc_mask(crtc);
 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(state, true);
 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         .get_vblank_counter     = drm_vblank_no_hw_counter,
 411         .enable_vblank          = exynos_drm_crtc_enable_vblank,
 412         .disable_vblank         = exynos_drm_crtc_disable_vblank,
 413         .gem_free_object_unlocked = exynos_drm_gem_free_object,
 414         .gem_vm_ops             = &exynos_drm_gem_vm_ops,
 415         .dumb_create            = exynos_drm_gem_dumb_create,
 416         .dumb_map_offset        = exynos_drm_gem_dumb_map_offset,
 417         .dumb_destroy           = drm_gem_dumb_destroy,
 418         .prime_handle_to_fd     = drm_gem_prime_handle_to_fd,
 419         .prime_fd_to_handle     = drm_gem_prime_fd_to_handle,
 420         .gem_prime_export       = drm_gem_prime_export,
 421         .gem_prime_import       = drm_gem_prime_import,
 422         .gem_prime_get_sg_table = exynos_drm_gem_prime_get_sg_table,
 423         .gem_prime_import_sg_table      = exynos_drm_gem_prime_import_sg_table,
 424         .gem_prime_vmap         = exynos_drm_gem_prime_vmap,
 425         .gem_prime_vunmap       = exynos_drm_gem_prime_vunmap,
 426         .gem_prime_mmap         = exynos_drm_gem_prime_mmap,
 427         .ioctls                 = exynos_ioctls,
 428         .num_ioctls             = ARRAY_SIZE(exynos_ioctls),
 429         .fops                   = &exynos_drm_driver_fops,
 430         .name   = DRIVER_NAME,
 431         .desc   = DRIVER_DESC,
 432         .date   = DRIVER_DATE,
 433         .major  = DRIVER_MAJOR,
 434         .minor  = DRIVER_MINOR,
 435 };
 436
 437 #ifdef CONFIG_PM_SLEEP
 438 static int exynos_drm_suspend(struct device *dev)
 439 {
 440         struct drm_device *drm_dev = dev_get_drvdata(dev);
 441         struct drm_connector *connector;
 442
 443         if (pm_runtime_suspended(dev) || !drm_dev)
 444                 return 0;
 445
 446         drm_modeset_lock_all(drm_dev);
 447         drm_for_each_connector(connector, drm_dev) {
 448                 int old_dpms = connector->dpms;
 449
 450                 if (connector->funcs->dpms)
 451                         connector->funcs->dpms(connector, DRM_MODE_DPMS_OFF);
 452
 453                 /* Set the old mode back to the connector for resume */
 454                 connector->dpms = old_dpms;
 455         }
 456         drm_modeset_unlock_all(drm_dev);
 457
 458         return 0;
 459 }
 460
 461 static int exynos_drm_resume(struct device *dev)
 462 {
 463         struct drm_device *drm_dev = dev_get_drvdata(dev);
 464         struct drm_connector *connector;
 465
 466         if (pm_runtime_suspended(dev) || !drm_dev)
 467                 return 0;
 468
 469         drm_modeset_lock_all(drm_dev);
 470         drm_for_each_connector(connector, drm_dev) {
 471                 if (connector->funcs->dpms) {
 472                         int dpms = connector->dpms;
 473
 474                         connector->dpms = DRM_MODE_DPMS_OFF;
 475                         connector->funcs->dpms(connector, dpms);
 476                 }
 477         }
 478         drm_modeset_unlock_all(drm_dev);
 479
 480         return 0;
 481 }
 482 #endif
 483
 484 static const struct dev_pm_ops exynos_drm_pm_ops = {
 485         SET_SYSTEM_SLEEP_PM_OPS(exynos_drm_suspend, exynos_drm_resume)
 486 };
 487
 488 /* forward declaration */
 489 static struct platform_driver exynos_drm_platform_driver;
 490
 491 struct exynos_drm_driver_info {
 492         struct platform_driver *driver;
 493         unsigned int flags;
 494 };
 495
 496 #define DRM_COMPONENT_DRIVER    BIT(0)  /* supports component framework */
 497 #define DRM_VIRTUAL_DEVICE      BIT(1)  /* create virtual platform device */
 498 #define DRM_DMA_DEVICE          BIT(2)  /* can be used for dma allocations */
 499
 500 #define DRV_PTR(drv, cond) (IS_ENABLED(cond) ? &drv : NULL)
 501
 502 /*
 503  * Connector drivers should not be placed before associated crtc drivers,
 504  * because connector requires pipe number of its crtc during initialization.
 505  */
 506 static struct exynos_drm_driver_info exynos_drm_drivers[] = {
 507         {
 508                 DRV_PTR(fimd_driver, CONFIG_DRM_EXYNOS_FIMD),
 509                 DRM_COMPONENT_DRIVER | DRM_DMA_DEVICE
 510         }, {
 511                 DRV_PTR(exynos5433_decon_driver, CONFIG_DRM_EXYNOS5433_DECON),
 512                 DRM_COMPONENT_DRIVER | DRM_DMA_DEVICE
 513         }, {
 514                 DRV_PTR(decon_driver, CONFIG_DRM_EXYNOS7_DECON),
 515                 DRM_COMPONENT_DRIVER | DRM_DMA_DEVICE
 516         }, {
 517                 DRV_PTR(mixer_driver, CONFIG_DRM_EXYNOS_MIXER),
 518                 DRM_COMPONENT_DRIVER | DRM_DMA_DEVICE
 519         }, {
 520                 DRV_PTR(mic_driver, CONFIG_DRM_EXYNOS_MIC),
 521                 DRM_COMPONENT_DRIVER
 522         }, {
 523                 DRV_PTR(dp_driver, CONFIG_DRM_EXYNOS_DP),
 524                 DRM_COMPONENT_DRIVER
 525         }, {
 526                 DRV_PTR(dsi_driver, CONFIG_DRM_EXYNOS_DSI),
 527                 DRM_COMPONENT_DRIVER
 528         }, {
 529                 DRV_PTR(hdmi_driver, CONFIG_DRM_EXYNOS_HDMI),
 530                 DRM_COMPONENT_DRIVER
 531         }, {
 532                 DRV_PTR(vidi_driver, CONFIG_DRM_EXYNOS_VIDI),
 533                 DRM_COMPONENT_DRIVER | DRM_VIRTUAL_DEVICE
 534         }, {
 535                 DRV_PTR(g2d_driver, CONFIG_DRM_EXYNOS_G2D),
 536         }, {
 537                 DRV_PTR(fimc_driver, CONFIG_DRM_EXYNOS_FIMC),
 538         }, {
 539                 DRV_PTR(rotator_driver, CONFIG_DRM_EXYNOS_ROTATOR),
 540         }, {
 541                 DRV_PTR(gsc_driver, CONFIG_DRM_EXYNOS_GSC),
 542         }, {
 543                 DRV_PTR(ipp_driver, CONFIG_DRM_EXYNOS_IPP),
 544                 DRM_VIRTUAL_DEVICE
 545         }, {
 546                 &exynos_drm_platform_driver,
 547                 DRM_VIRTUAL_DEVICE
 548         }
 549 };
 550
 551 static int compare_dev(struct device *dev, void *data)
 552 {
 553         return dev == (struct device *)data;
 554 }
 555
 556 static struct component_match *exynos_drm_match_add(struct device *dev)
 557 {
 558         struct component_match *match = NULL;
 559         int i;
 560
 561         for (i = 0; i < ARRAY_SIZE(exynos_drm_drivers); ++i) {
 562                 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i];
 563                 struct device *p = NULL, *d;
 564
 565                 if (!info->driver || !(info->flags & DRM_COMPONENT_DRIVER))
 566                         continue;
 567
 568                 while ((d = bus_find_device(&platform_bus_type, p,
 569                                             &info->driver->driver,
 570                                             (void *)platform_bus_type.match))) {
 571                         put_device(p);
 572                         component_match_add(dev, &match, compare_dev, d);
 573                         p = d;
 574                 }
 575                 put_device(p);
 576         }
 577
 578         return match ?: ERR_PTR(-ENODEV);
 579 }
 580
 581 static int exynos_drm_bind(struct device *dev)
 582 {
 583         return drm_platform_init(&exynos_drm_driver, to_platform_device(dev));
 584 }
 585
 586 static void exynos_drm_unbind(struct device *dev)
 587 {
 588         drm_put_dev(dev_get_drvdata(dev));
 589 }
 590
 591 static const struct component_master_ops exynos_drm_ops = {
 592         .bind           = exynos_drm_bind,
 593         .unbind         = exynos_drm_unbind,
 594 };
 595
 596 static int exynos_drm_platform_probe(struct platform_device *pdev)
 597 {
 598         struct component_match *match;
 599
 600         pdev->dev.coherent_dma_mask = DMA_BIT_MASK(32);
 601         exynos_drm_driver.num_ioctls = ARRAY_SIZE(exynos_ioctls);
 602
 603         match = exynos_drm_match_add(&pdev->dev);
 604         if (IS_ERR(match))
 605                 return PTR_ERR(match);
 606
 607         return component_master_add_with_match(&pdev->dev, &exynos_drm_ops,
 608                                                match);
 609 }
 610
 611 static int exynos_drm_platform_remove(struct platform_device *pdev)
 612 {
 613         component_master_del(&pdev->dev, &exynos_drm_ops);
 614         return 0;
 615 }
 616
 617 static struct platform_driver exynos_drm_platform_driver = {
 618         .probe  = exynos_drm_platform_probe,
 619         .remove = exynos_drm_platform_remove,
 620         .driver = {
 621                 .name   = "exynos-drm",
 622                 .pm     = &exynos_drm_pm_ops,
 623         },
 624 };
 625
 626 static struct device *exynos_drm_get_dma_device(void)
 627 {
 628         int i;
 629
 630         for (i = 0; i < ARRAY_SIZE(exynos_drm_drivers); ++i) {
 631                 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i];
 632                 struct device *dev;
 633
 634                 if (!info->driver || !(info->flags & DRM_DMA_DEVICE))
 635                         continue;
 636
 637                 while ((dev = bus_find_device(&platform_bus_type, NULL,
 638                                             &info->driver->driver,
 639                                             (void *)platform_bus_type.match))) {
 640                         put_device(dev);
 641                         return dev;
 642                 }
 643         }
 644         return NULL;
 645 }
 646
 647 static void exynos_drm_unregister_devices(void)
 648 {
 649         int i;
 650
 651         for (i = ARRAY_SIZE(exynos_drm_drivers) - 1; i >= 0; --i) {
 652                 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i];
 653                 struct device *dev;
 654
 655                 if (!info->driver || !(info->flags & DRM_VIRTUAL_DEVICE))
 656                         continue;
 657
 658                 while ((dev = bus_find_device(&platform_bus_type, NULL,
 659                                             &info->driver->driver,
 660                                             (void *)platform_bus_type.match))) {
 661                         put_device(dev);
 662                         platform_device_unregister(to_platform_device(dev));
 663                 }
 664         }
 665 }
 666
 667 static int exynos_drm_register_devices(void)
 668 {
 669         struct platform_device *pdev;
 670         int i;
 671
 672         for (i = 0; i < ARRAY_SIZE(exynos_drm_drivers); ++i) {
 673                 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i];
 674
 675                 if (!info->driver || !(info->flags & DRM_VIRTUAL_DEVICE))
 676                         continue;
 677
 678                 pdev = platform_device_register_simple(
 679                                         info->driver->driver.name, -1, NULL, 0);
 680                 if (IS_ERR(pdev))
 681                         goto fail;
 682         }
 683
 684         return 0;
 685 fail:
 686         exynos_drm_unregister_devices();
 687         return PTR_ERR(pdev);
 688 }
 689
 690 static void exynos_drm_unregister_drivers(void)
 691 {
 692         int i;
 693
 694         for (i = ARRAY_SIZE(exynos_drm_drivers) - 1; i >= 0; --i) {
 695                 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i];
 696
 697                 if (!info->driver)
 698                         continue;
 699
 700                 platform_driver_unregister(info->driver);
 701         }
 702 }
 703
 704 static int exynos_drm_register_drivers(void)
 705 {
 706         int i, ret;
 707
 708         for (i = 0; i < ARRAY_SIZE(exynos_drm_drivers); ++i) {
 709                 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i];
 710
 711                 if (!info->driver)
 712                         continue;
 713
 714                 ret = platform_driver_register(info->driver);
 715                 if (ret)
 716                         goto fail;
 717         }
 718         return 0;
 719 fail:
 720         exynos_drm_unregister_drivers();
 721         return ret;
 722 }
 723
 724 static int exynos_drm_init(void)
 725 {
 726         int ret;
 727
 728         ret = exynos_drm_register_devices();
 729         if (ret)
 730                 return ret;
 731
 732         ret = exynos_drm_register_drivers();
 733         if (ret)
 734                 goto err_unregister_pdevs;
 735
 736         return 0;
 737
 738 err_unregister_pdevs:
 739         exynos_drm_unregister_devices();
 740
 741         return ret;
 742 }
 743
 744 static void exynos_drm_exit(void)
 745 {
 746         exynos_drm_unregister_drivers();
 747         exynos_drm_unregister_devices();
 748 }
 749
 750 module_init(exynos_drm_init);
 751 module_exit(exynos_drm_exit);
 752
 753 MODULE_AUTHOR("Inki Dae <inki.dae@samsung.com>");
 754 MODULE_AUTHOR("Joonyoung Shim <jy0922.shim@samsung.com>");
 755 MODULE_AUTHOR("Seung-Woo Kim <sw0312.kim@samsung.com>");
 756 MODULE_DESCRIPTION("Samsung SoC DRM Driver");
 757 MODULE_LICENSE("GPL");