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