drivers/gpu/drm/mediatek/mtk_drm_drv.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Copyright (c) 2015 MediaTek Inc.
   4  * Author: YT SHEN <yt.shen@mediatek.com>
   5  */
   6
   7 #include <linux/component.h>
   8 #include <linux/iommu.h>
   9 #include <linux/module.h>
  10 #include <linux/of_address.h>
  11 #include <linux/of_platform.h>
  12 #include <linux/pm_runtime.h>
  13 #include <linux/soc/mediatek/mtk-mmsys.h>
  14 #include <linux/dma-mapping.h>
  15
  16 #include <drm/drm_atomic.h>
  17 #include <drm/drm_atomic_helper.h>
  18 #include <drm/drm_drv.h>
  19 #include <drm/drm_fb_helper.h>
  20 #include <drm/drm_fourcc.h>
  21 #include <drm/drm_gem.h>
  22 #include <drm/drm_gem_cma_helper.h>
  23 #include <drm/drm_gem_framebuffer_helper.h>
  24 #include <drm/drm_of.h>
  25 #include <drm/drm_probe_helper.h>
  26 #include <drm/drm_vblank.h>
  27
  28 #include "mtk_drm_crtc.h"
  29 #include "mtk_drm_ddp.h"
  30 #include "mtk_drm_ddp_comp.h"
  31 #include "mtk_drm_drv.h"
  32 #include "mtk_drm_gem.h"
  33
  34 #define DRIVER_NAME "mediatek"
  35 #define DRIVER_DESC "Mediatek SoC DRM"
  36 #define DRIVER_DATE "20150513"
  37 #define DRIVER_MAJOR 1
  38 #define DRIVER_MINOR 0
  39
  40 static const struct drm_mode_config_helper_funcs mtk_drm_mode_config_helpers = {
  41         .atomic_commit_tail = drm_atomic_helper_commit_tail_rpm,
  42 };
  43
  44 static struct drm_framebuffer *
  45 mtk_drm_mode_fb_create(struct drm_device *dev,
  46                        struct drm_file *file,
  47                        const struct drm_mode_fb_cmd2 *cmd)
  48 {
  49         const struct drm_format_info *info = drm_get_format_info(dev, cmd);
  50
  51         if (info->num_planes != 1)
  52                 return ERR_PTR(-EINVAL);
  53
  54         return drm_gem_fb_create(dev, file, cmd);
  55 }
  56
  57 static const struct drm_mode_config_funcs mtk_drm_mode_config_funcs = {
  58         .fb_create = mtk_drm_mode_fb_create,
  59         .atomic_check = drm_atomic_helper_check,
  60         .atomic_commit = drm_atomic_helper_commit,
  61 };
  62
  63 static const enum mtk_ddp_comp_id mt2701_mtk_ddp_main[] = {
  64         DDP_COMPONENT_OVL0,
  65         DDP_COMPONENT_RDMA0,
  66         DDP_COMPONENT_COLOR0,
  67         DDP_COMPONENT_BLS,
  68         DDP_COMPONENT_DSI0,
  69 };
  70
  71 static const enum mtk_ddp_comp_id mt2701_mtk_ddp_ext[] = {
  72         DDP_COMPONENT_RDMA1,
  73         DDP_COMPONENT_DPI0,
  74 };
  75
  76 static const enum mtk_ddp_comp_id mt7623_mtk_ddp_main[] = {
  77         DDP_COMPONENT_OVL0,
  78         DDP_COMPONENT_RDMA0,
  79         DDP_COMPONENT_COLOR0,
  80         DDP_COMPONENT_BLS,
  81         DDP_COMPONENT_DPI0,
  82 };
  83
  84 static const enum mtk_ddp_comp_id mt7623_mtk_ddp_ext[] = {
  85         DDP_COMPONENT_RDMA1,
  86         DDP_COMPONENT_DSI0,
  87 };
  88
  89 static const enum mtk_ddp_comp_id mt2712_mtk_ddp_main[] = {
  90         DDP_COMPONENT_OVL0,
  91         DDP_COMPONENT_COLOR0,
  92         DDP_COMPONENT_AAL0,
  93         DDP_COMPONENT_OD0,
  94         DDP_COMPONENT_RDMA0,
  95         DDP_COMPONENT_DPI0,
  96         DDP_COMPONENT_PWM0,
  97 };
  98
  99 static const enum mtk_ddp_comp_id mt2712_mtk_ddp_ext[] = {
 100         DDP_COMPONENT_OVL1,
 101         DDP_COMPONENT_COLOR1,
 102         DDP_COMPONENT_AAL1,
 103         DDP_COMPONENT_OD1,
 104         DDP_COMPONENT_RDMA1,
 105         DDP_COMPONENT_DPI1,
 106         DDP_COMPONENT_PWM1,
 107 };
 108
 109 static const enum mtk_ddp_comp_id mt2712_mtk_ddp_third[] = {
 110         DDP_COMPONENT_RDMA2,
 111         DDP_COMPONENT_DSI3,
 112         DDP_COMPONENT_PWM2,
 113 };
 114
 115 static const enum mtk_ddp_comp_id mt8173_mtk_ddp_main[] = {
 116         DDP_COMPONENT_OVL0,
 117         DDP_COMPONENT_COLOR0,
 118         DDP_COMPONENT_AAL0,
 119         DDP_COMPONENT_OD0,
 120         DDP_COMPONENT_RDMA0,
 121         DDP_COMPONENT_UFOE,
 122         DDP_COMPONENT_DSI0,
 123         DDP_COMPONENT_PWM0,
 124 };
 125
 126 static const enum mtk_ddp_comp_id mt8173_mtk_ddp_ext[] = {
 127         DDP_COMPONENT_OVL1,
 128         DDP_COMPONENT_COLOR1,
 129         DDP_COMPONENT_GAMMA,
 130         DDP_COMPONENT_RDMA1,
 131         DDP_COMPONENT_DPI0,
 132 };
 133
 134 static const struct mtk_mmsys_driver_data mt2701_mmsys_driver_data = {
 135         .main_path = mt2701_mtk_ddp_main,
 136         .main_len = ARRAY_SIZE(mt2701_mtk_ddp_main),
 137         .ext_path = mt2701_mtk_ddp_ext,
 138         .ext_len = ARRAY_SIZE(mt2701_mtk_ddp_ext),
 139         .shadow_register = true,
 140 };
 141
 142 static const struct mtk_mmsys_driver_data mt7623_mmsys_driver_data = {
 143         .main_path = mt7623_mtk_ddp_main,
 144         .main_len = ARRAY_SIZE(mt7623_mtk_ddp_main),
 145         .ext_path = mt7623_mtk_ddp_ext,
 146         .ext_len = ARRAY_SIZE(mt7623_mtk_ddp_ext),
 147         .shadow_register = true,
 148 };
 149
 150 static const struct mtk_mmsys_driver_data mt2712_mmsys_driver_data = {
 151         .main_path = mt2712_mtk_ddp_main,
 152         .main_len = ARRAY_SIZE(mt2712_mtk_ddp_main),
 153         .ext_path = mt2712_mtk_ddp_ext,
 154         .ext_len = ARRAY_SIZE(mt2712_mtk_ddp_ext),
 155         .third_path = mt2712_mtk_ddp_third,
 156         .third_len = ARRAY_SIZE(mt2712_mtk_ddp_third),
 157 };
 158
 159 static const struct mtk_mmsys_driver_data mt8173_mmsys_driver_data = {
 160         .main_path = mt8173_mtk_ddp_main,
 161         .main_len = ARRAY_SIZE(mt8173_mtk_ddp_main),
 162         .ext_path = mt8173_mtk_ddp_ext,
 163         .ext_len = ARRAY_SIZE(mt8173_mtk_ddp_ext),
 164 };
 165
 166 static int mtk_drm_kms_init(struct drm_device *drm)
 167 {
 168         struct mtk_drm_private *private = drm->dev_private;
 169         struct platform_device *pdev;
 170         struct device_node *np;
 171         struct device *dma_dev;
 172         int ret;
 173
 174         if (!iommu_present(&platform_bus_type))
 175                 return -EPROBE_DEFER;
 176
 177         pdev = of_find_device_by_node(private->mutex_node);
 178         if (!pdev) {
 179                 dev_err(drm->dev, "Waiting for disp-mutex device %pOF\n",
 180                         private->mutex_node);
 181                 of_node_put(private->mutex_node);
 182                 return -EPROBE_DEFER;
 183         }
 184         private->mutex_dev = &pdev->dev;
 185
 186         ret = drmm_mode_config_init(drm);
 187         if (ret)
 188                 goto put_mutex_dev;
 189
 190         drm->mode_config.min_width = 64;
 191         drm->mode_config.min_height = 64;
 192
 193         /*
 194          * set max width and height as default value(4096x4096).
 195          * this value would be used to check framebuffer size limitation
 196          * at drm_mode_addfb().
 197          */
 198         drm->mode_config.max_width = 4096;
 199         drm->mode_config.max_height = 4096;
 200         drm->mode_config.funcs = &mtk_drm_mode_config_funcs;
 201         drm->mode_config.helper_private = &mtk_drm_mode_config_helpers;
 202
 203         ret = component_bind_all(drm->dev, drm);
 204         if (ret)
 205                 goto put_mutex_dev;
 206
 207         /*
 208          * We currently support two fixed data streams, each optional,
 209          * and each statically assigned to a crtc:
 210          * OVL0 -> COLOR0 -> AAL -> OD -> RDMA0 -> UFOE -> DSI0 ...
 211          */
 212         ret = mtk_drm_crtc_create(drm, private->data->main_path,
 213                                   private->data->main_len);
 214         if (ret < 0)
 215                 goto err_component_unbind;
 216         /* ... and OVL1 -> COLOR1 -> GAMMA -> RDMA1 -> DPI0. */
 217         ret = mtk_drm_crtc_create(drm, private->data->ext_path,
 218                                   private->data->ext_len);
 219         if (ret < 0)
 220                 goto err_component_unbind;
 221
 222         ret = mtk_drm_crtc_create(drm, private->data->third_path,
 223                                   private->data->third_len);
 224         if (ret < 0)
 225                 goto err_component_unbind;
 226
 227         /* Use OVL device for all DMA memory allocations */
 228         np = private->comp_node[private->data->main_path[0]] ?:
 229              private->comp_node[private->data->ext_path[0]];
 230         pdev = of_find_device_by_node(np);
 231         if (!pdev) {
 232                 ret = -ENODEV;
 233                 dev_err(drm->dev, "Need at least one OVL device\n");
 234                 goto err_component_unbind;
 235         }
 236
 237         dma_dev = &pdev->dev;
 238         private->dma_dev = dma_dev;
 239
 240         /*
 241          * Configure the DMA segment size to make sure we get contiguous IOVA
 242          * when importing PRIME buffers.
 243          */
 244         ret = dma_set_max_seg_size(dma_dev, UINT_MAX);
 245         if (ret) {
 246                 dev_err(dma_dev, "Failed to set DMA segment size\n");
 247                 goto err_component_unbind;
 248         }
 249
 250         /*
 251          * We don't use the drm_irq_install() helpers provided by the DRM
 252          * core, so we need to set this manually in order to allow the
 253          * DRM_IOCTL_WAIT_VBLANK to operate correctly.
 254          */
 255         drm->irq_enabled = true;
 256         ret = drm_vblank_init(drm, MAX_CRTC);
 257         if (ret < 0)
 258                 goto err_component_unbind;
 259
 260         drm_kms_helper_poll_init(drm);
 261         drm_mode_config_reset(drm);
 262
 263         return 0;
 264
 265 err_component_unbind:
 266         component_unbind_all(drm->dev, drm);
 267 put_mutex_dev:
 268         put_device(private->mutex_dev);
 269         return ret;
 270 }
 271
 272 static void mtk_drm_kms_deinit(struct drm_device *drm)
 273 {
 274         drm_kms_helper_poll_fini(drm);
 275         drm_atomic_helper_shutdown(drm);
 276
 277         component_unbind_all(drm->dev, drm);
 278 }
 279
 280 static const struct file_operations mtk_drm_fops = {
 281         .owner = THIS_MODULE,
 282         .open = drm_open,
 283         .release = drm_release,
 284         .unlocked_ioctl = drm_ioctl,
 285         .mmap = mtk_drm_gem_mmap,
 286         .poll = drm_poll,
 287         .read = drm_read,
 288         .compat_ioctl = drm_compat_ioctl,
 289 };
 290
 291 /*
 292  * We need to override this because the device used to import the memory is
 293  * not dev->dev, as drm_gem_prime_import() expects.
 294  */
 295 static struct drm_gem_object *mtk_drm_gem_prime_import(struct drm_device *dev,
 296                                                        struct dma_buf *dma_buf)
 297 {
 298         struct mtk_drm_private *private = dev->dev_private;
 299
 300         return drm_gem_prime_import_dev(dev, dma_buf, private->dma_dev);
 301 }
 302
 303 static const struct drm_driver mtk_drm_driver = {
 304         .driver_features = DRIVER_MODESET | DRIVER_GEM | DRIVER_ATOMIC,
 305
 306         .dumb_create = mtk_drm_gem_dumb_create,
 307
 308         .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
 309         .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
 310         .gem_prime_import = mtk_drm_gem_prime_import,
 311         .gem_prime_import_sg_table = mtk_gem_prime_import_sg_table,
 312         .gem_prime_mmap = mtk_drm_gem_mmap_buf,
 313         .fops = &mtk_drm_fops,
 314
 315         .name = DRIVER_NAME,
 316         .desc = DRIVER_DESC,
 317         .date = DRIVER_DATE,
 318         .major = DRIVER_MAJOR,
 319         .minor = DRIVER_MINOR,
 320 };
 321
 322 static int compare_of(struct device *dev, void *data)
 323 {
 324         return dev->of_node == data;
 325 }
 326
 327 static int mtk_drm_bind(struct device *dev)
 328 {
 329         struct mtk_drm_private *private = dev_get_drvdata(dev);
 330         struct drm_device *drm;
 331         int ret;
 332
 333         drm = drm_dev_alloc(&mtk_drm_driver, dev);
 334         if (IS_ERR(drm))
 335                 return PTR_ERR(drm);
 336
 337         drm->dev_private = private;
 338         private->drm = drm;
 339
 340         ret = mtk_drm_kms_init(drm);
 341         if (ret < 0)
 342                 goto err_free;
 343
 344         ret = drm_dev_register(drm, 0);
 345         if (ret < 0)
 346                 goto err_deinit;
 347
 348         drm_fbdev_generic_setup(drm, 32);
 349
 350         return 0;
 351
 352 err_deinit:
 353         mtk_drm_kms_deinit(drm);
 354 err_free:
 355         drm_dev_put(drm);
 356         return ret;
 357 }
 358
 359 static void mtk_drm_unbind(struct device *dev)
 360 {
 361         struct mtk_drm_private *private = dev_get_drvdata(dev);
 362
 363         drm_dev_unregister(private->drm);
 364         mtk_drm_kms_deinit(private->drm);
 365         drm_dev_put(private->drm);
 366         private->num_pipes = 0;
 367         private->drm = NULL;
 368 }
 369
 370 static const struct component_master_ops mtk_drm_ops = {
 371         .bind           = mtk_drm_bind,
 372         .unbind         = mtk_drm_unbind,
 373 };
 374
 375 static const struct of_device_id mtk_ddp_comp_dt_ids[] = {
 376         { .compatible = "mediatek,mt2701-disp-ovl",
 377           .data = (void *)MTK_DISP_OVL },
 378         { .compatible = "mediatek,mt8173-disp-ovl",
 379           .data = (void *)MTK_DISP_OVL },
 380         { .compatible = "mediatek,mt2701-disp-rdma",
 381           .data = (void *)MTK_DISP_RDMA },
 382         { .compatible = "mediatek,mt8173-disp-rdma",
 383           .data = (void *)MTK_DISP_RDMA },
 384         { .compatible = "mediatek,mt8173-disp-wdma",
 385           .data = (void *)MTK_DISP_WDMA },
 386         { .compatible = "mediatek,mt2701-disp-color",
 387           .data = (void *)MTK_DISP_COLOR },
 388         { .compatible = "mediatek,mt8173-disp-color",
 389           .data = (void *)MTK_DISP_COLOR },
 390         { .compatible = "mediatek,mt8173-disp-aal",
 391           .data = (void *)MTK_DISP_AAL},
 392         { .compatible = "mediatek,mt8173-disp-gamma",
 393           .data = (void *)MTK_DISP_GAMMA, },
 394         { .compatible = "mediatek,mt8173-disp-ufoe",
 395           .data = (void *)MTK_DISP_UFOE },
 396         { .compatible = "mediatek,mt2701-dsi",
 397           .data = (void *)MTK_DSI },
 398         { .compatible = "mediatek,mt8173-dsi",
 399           .data = (void *)MTK_DSI },
 400         { .compatible = "mediatek,mt2701-dpi",
 401           .data = (void *)MTK_DPI },
 402         { .compatible = "mediatek,mt8173-dpi",
 403           .data = (void *)MTK_DPI },
 404         { .compatible = "mediatek,mt2701-disp-mutex",
 405           .data = (void *)MTK_DISP_MUTEX },
 406         { .compatible = "mediatek,mt2712-disp-mutex",
 407           .data = (void *)MTK_DISP_MUTEX },
 408         { .compatible = "mediatek,mt8173-disp-mutex",
 409           .data = (void *)MTK_DISP_MUTEX },
 410         { .compatible = "mediatek,mt2701-disp-pwm",
 411           .data = (void *)MTK_DISP_BLS },
 412         { .compatible = "mediatek,mt8173-disp-pwm",
 413           .data = (void *)MTK_DISP_PWM },
 414         { .compatible = "mediatek,mt8173-disp-od",
 415           .data = (void *)MTK_DISP_OD },
 416         { }
 417 };
 418
 419 static const struct of_device_id mtk_drm_of_ids[] = {
 420         { .compatible = "mediatek,mt2701-mmsys",
 421           .data = &mt2701_mmsys_driver_data},
 422         { .compatible = "mediatek,mt7623-mmsys",
 423           .data = &mt7623_mmsys_driver_data},
 424         { .compatible = "mediatek,mt2712-mmsys",
 425           .data = &mt2712_mmsys_driver_data},
 426         { .compatible = "mediatek,mt8173-mmsys",
 427           .data = &mt8173_mmsys_driver_data},
 428         { }
 429 };
 430
 431 static int mtk_drm_probe(struct platform_device *pdev)
 432 {
 433         struct device *dev = &pdev->dev;
 434         struct device_node *phandle = dev->parent->of_node;
 435         const struct of_device_id *of_id;
 436         struct mtk_drm_private *private;
 437         struct device_node *node;
 438         struct component_match *match = NULL;
 439         int ret;
 440         int i;
 441
 442         private = devm_kzalloc(dev, sizeof(*private), GFP_KERNEL);
 443         if (!private)
 444                 return -ENOMEM;
 445
 446         private->mmsys_dev = dev->parent;
 447         if (!private->mmsys_dev) {
 448                 dev_err(dev, "Failed to get MMSYS device\n");
 449                 return -ENODEV;
 450         }
 451
 452         of_id = of_match_node(mtk_drm_of_ids, phandle);
 453         if (!of_id)
 454                 return -ENODEV;
 455
 456         private->data = of_id->data;
 457
 458         /* Iterate over sibling DISP function blocks */
 459         for_each_child_of_node(phandle->parent, node) {
 460                 const struct of_device_id *of_id;
 461                 enum mtk_ddp_comp_type comp_type;
 462                 int comp_id;
 463
 464                 of_id = of_match_node(mtk_ddp_comp_dt_ids, node);
 465                 if (!of_id)
 466                         continue;
 467
 468                 if (!of_device_is_available(node)) {
 469                         dev_dbg(dev, "Skipping disabled component %pOF\n",
 470                                 node);
 471                         continue;
 472                 }
 473
 474                 comp_type = (enum mtk_ddp_comp_type)of_id->data;
 475
 476                 if (comp_type == MTK_DISP_MUTEX) {
 477                         private->mutex_node = of_node_get(node);
 478                         continue;
 479                 }
 480
 481                 comp_id = mtk_ddp_comp_get_id(node, comp_type);
 482                 if (comp_id < 0) {
 483                         dev_warn(dev, "Skipping unknown component %pOF\n",
 484                                  node);
 485                         continue;
 486                 }
 487
 488                 private->comp_node[comp_id] = of_node_get(node);
 489
 490                 /*
 491                  * Currently only the COLOR, OVL, RDMA, DSI, and DPI blocks have
 492                  * separate component platform drivers and initialize their own
 493                  * DDP component structure. The others are initialized here.
 494                  */
 495                 if (comp_type == MTK_DISP_COLOR ||
 496                     comp_type == MTK_DISP_OVL ||
 497                     comp_type == MTK_DISP_OVL_2L ||
 498                     comp_type == MTK_DISP_RDMA ||
 499                     comp_type == MTK_DSI ||
 500                     comp_type == MTK_DPI) {
 501                         dev_info(dev, "Adding component match for %pOF\n",
 502                                  node);
 503                         drm_of_component_match_add(dev, &match, compare_of,
 504                                                    node);
 505                 } else {
 506                         struct mtk_ddp_comp *comp;
 507
 508                         comp = devm_kzalloc(dev, sizeof(*comp), GFP_KERNEL);
 509                         if (!comp) {
 510                                 ret = -ENOMEM;
 511                                 of_node_put(node);
 512                                 goto err_node;
 513                         }
 514
 515                         ret = mtk_ddp_comp_init(dev->parent, node, comp,
 516                                                 comp_id, NULL);
 517                         if (ret) {
 518                                 of_node_put(node);
 519                                 goto err_node;
 520                         }
 521
 522                         private->ddp_comp[comp_id] = comp;
 523                 }
 524         }
 525
 526         if (!private->mutex_node) {
 527                 dev_err(dev, "Failed to find disp-mutex node\n");
 528                 ret = -ENODEV;
 529                 goto err_node;
 530         }
 531
 532         pm_runtime_enable(dev);
 533
 534         platform_set_drvdata(pdev, private);
 535
 536         ret = component_master_add_with_match(dev, &mtk_drm_ops, match);
 537         if (ret)
 538                 goto err_pm;
 539
 540         return 0;
 541
 542 err_pm:
 543         pm_runtime_disable(dev);
 544 err_node:
 545         of_node_put(private->mutex_node);
 546         for (i = 0; i < DDP_COMPONENT_ID_MAX; i++) {
 547                 of_node_put(private->comp_node[i]);
 548                 if (private->ddp_comp[i]) {
 549                         put_device(private->ddp_comp[i]->larb_dev);
 550                         private->ddp_comp[i] = NULL;
 551                 }
 552         }
 553         return ret;
 554 }
 555
 556 static int mtk_drm_remove(struct platform_device *pdev)
 557 {
 558         struct mtk_drm_private *private = platform_get_drvdata(pdev);
 559         int i;
 560
 561         component_master_del(&pdev->dev, &mtk_drm_ops);
 562         pm_runtime_disable(&pdev->dev);
 563         of_node_put(private->mutex_node);
 564         for (i = 0; i < DDP_COMPONENT_ID_MAX; i++)
 565                 of_node_put(private->comp_node[i]);
 566
 567         return 0;
 568 }
 569
 570 #ifdef CONFIG_PM_SLEEP
 571 static int mtk_drm_sys_suspend(struct device *dev)
 572 {
 573         struct mtk_drm_private *private = dev_get_drvdata(dev);
 574         struct drm_device *drm = private->drm;
 575         int ret;
 576
 577         ret = drm_mode_config_helper_suspend(drm);
 578
 579         return ret;
 580 }
 581
 582 static int mtk_drm_sys_resume(struct device *dev)
 583 {
 584         struct mtk_drm_private *private = dev_get_drvdata(dev);
 585         struct drm_device *drm = private->drm;
 586         int ret;
 587
 588         ret = drm_mode_config_helper_resume(drm);
 589
 590         return ret;
 591 }
 592 #endif
 593
 594 static SIMPLE_DEV_PM_OPS(mtk_drm_pm_ops, mtk_drm_sys_suspend,
 595                          mtk_drm_sys_resume);
 596
 597 static struct platform_driver mtk_drm_platform_driver = {
 598         .probe  = mtk_drm_probe,
 599         .remove = mtk_drm_remove,
 600         .driver = {
 601                 .name   = "mediatek-drm",
 602                 .pm     = &mtk_drm_pm_ops,
 603         },
 604 };
 605
 606 static struct platform_driver * const mtk_drm_drivers[] = {
 607         &mtk_ddp_driver,
 608         &mtk_disp_color_driver,
 609         &mtk_disp_ovl_driver,
 610         &mtk_disp_rdma_driver,
 611         &mtk_dpi_driver,
 612         &mtk_drm_platform_driver,
 613         &mtk_dsi_driver,
 614 };
 615
 616 static int __init mtk_drm_init(void)
 617 {
 618         return platform_register_drivers(mtk_drm_drivers,
 619                                          ARRAY_SIZE(mtk_drm_drivers));
 620 }
 621
 622 static void __exit mtk_drm_exit(void)
 623 {
 624         platform_unregister_drivers(mtk_drm_drivers,
 625                                     ARRAY_SIZE(mtk_drm_drivers));
 626 }
 627
 628 module_init(mtk_drm_init);
 629 module_exit(mtk_drm_exit);
 630
 631 MODULE_AUTHOR("YT SHEN <yt.shen@mediatek.com>");
 632 MODULE_DESCRIPTION("Mediatek SoC DRM driver");
 633 MODULE_LICENSE("GPL v2");