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 <drm/drmP.h>
   8 #include <drm/drm_atomic.h>
   9 #include <drm/drm_atomic_helper.h>
  10 #include <drm/drm_fb_helper.h>
  11 #include <drm/drm_gem.h>
  12 #include <drm/drm_gem_cma_helper.h>
  13 #include <drm/drm_of.h>
  14 #include <drm/drm_probe_helper.h>
  15 #include <linux/component.h>
  16 #include <linux/iommu.h>
  17 #include <linux/of_address.h>
  18 #include <linux/of_platform.h>
  19 #include <linux/pm_runtime.h>
  20
  21 #include "mtk_drm_crtc.h"
  22 #include "mtk_drm_ddp.h"
  23 #include "mtk_drm_ddp_comp.h"
  24 #include "mtk_drm_drv.h"
  25 #include "mtk_drm_fb.h"
  26 #include "mtk_drm_gem.h"
  27
  28 #define DRIVER_NAME "mediatek"
  29 #define DRIVER_DESC "Mediatek SoC DRM"
  30 #define DRIVER_DATE "20150513"
  31 #define DRIVER_MAJOR 1
  32 #define DRIVER_MINOR 0
  33
  34 static void mtk_atomic_schedule(struct mtk_drm_private *private,
  35                                 struct drm_atomic_state *state)
  36 {
  37         private->commit.state = state;
  38         schedule_work(&private->commit.work);
  39 }
  40
  41 static void mtk_atomic_complete(struct mtk_drm_private *private,
  42                                 struct drm_atomic_state *state)
  43 {
  44         struct drm_device *drm = private->drm;
  45
  46         drm_atomic_helper_wait_for_fences(drm, state, false);
  47
  48         /*
  49          * Mediatek drm supports runtime PM, so plane registers cannot be
  50          * written when their crtc is disabled.
  51          *
  52          * The comment for drm_atomic_helper_commit states:
  53          *     For drivers supporting runtime PM the recommended sequence is
  54          *
  55          *     drm_atomic_helper_commit_modeset_disables(dev, state);
  56          *     drm_atomic_helper_commit_modeset_enables(dev, state);
  57          *     drm_atomic_helper_commit_planes(dev, state,
  58          *                                     DRM_PLANE_COMMIT_ACTIVE_ONLY);
  59          *
  60          * See the kerneldoc entries for these three functions for more details.
  61          */
  62         drm_atomic_helper_commit_modeset_disables(drm, state);
  63         drm_atomic_helper_commit_modeset_enables(drm, state);
  64         drm_atomic_helper_commit_planes(drm, state,
  65                                         DRM_PLANE_COMMIT_ACTIVE_ONLY);
  66
  67         drm_atomic_helper_wait_for_vblanks(drm, state);
  68
  69         drm_atomic_helper_cleanup_planes(drm, state);
  70         drm_atomic_state_put(state);
  71 }
  72
  73 static void mtk_atomic_work(struct work_struct *work)
  74 {
  75         struct mtk_drm_private *private = container_of(work,
  76                         struct mtk_drm_private, commit.work);
  77
  78         mtk_atomic_complete(private, private->commit.state);
  79 }
  80
  81 static int mtk_atomic_commit(struct drm_device *drm,
  82                              struct drm_atomic_state *state,
  83                              bool async)
  84 {
  85         struct mtk_drm_private *private = drm->dev_private;
  86         int ret;
  87
  88         ret = drm_atomic_helper_prepare_planes(drm, state);
  89         if (ret)
  90                 return ret;
  91
  92         mutex_lock(&private->commit.lock);
  93         flush_work(&private->commit.work);
  94
  95         ret = drm_atomic_helper_swap_state(state, true);
  96         if (ret) {
  97                 mutex_unlock(&private->commit.lock);
  98                 drm_atomic_helper_cleanup_planes(drm, state);
  99                 return ret;
 100         }
 101
 102         drm_atomic_state_get(state);
 103         if (async)
 104                 mtk_atomic_schedule(private, state);
 105         else
 106                 mtk_atomic_complete(private, state);
 107
 108         mutex_unlock(&private->commit.lock);
 109
 110         return 0;
 111 }
 112
 113 static const struct drm_mode_config_funcs mtk_drm_mode_config_funcs = {
 114         .fb_create = mtk_drm_mode_fb_create,
 115         .atomic_check = drm_atomic_helper_check,
 116         .atomic_commit = mtk_atomic_commit,
 117 };
 118
 119 static const enum mtk_ddp_comp_id mt2701_mtk_ddp_main[] = {
 120         DDP_COMPONENT_OVL0,
 121         DDP_COMPONENT_RDMA0,
 122         DDP_COMPONENT_COLOR0,
 123         DDP_COMPONENT_BLS,
 124         DDP_COMPONENT_DSI0,
 125 };
 126
 127 static const enum mtk_ddp_comp_id mt2701_mtk_ddp_ext[] = {
 128         DDP_COMPONENT_RDMA1,
 129         DDP_COMPONENT_DPI0,
 130 };
 131
 132 static const enum mtk_ddp_comp_id mt2712_mtk_ddp_main[] = {
 133         DDP_COMPONENT_OVL0,
 134         DDP_COMPONENT_COLOR0,
 135         DDP_COMPONENT_AAL0,
 136         DDP_COMPONENT_OD0,
 137         DDP_COMPONENT_RDMA0,
 138         DDP_COMPONENT_DPI0,
 139         DDP_COMPONENT_PWM0,
 140 };
 141
 142 static const enum mtk_ddp_comp_id mt2712_mtk_ddp_ext[] = {
 143         DDP_COMPONENT_OVL1,
 144         DDP_COMPONENT_COLOR1,
 145         DDP_COMPONENT_AAL1,
 146         DDP_COMPONENT_OD1,
 147         DDP_COMPONENT_RDMA1,
 148         DDP_COMPONENT_DPI1,
 149         DDP_COMPONENT_PWM1,
 150 };
 151
 152 static const enum mtk_ddp_comp_id mt2712_mtk_ddp_third[] = {
 153         DDP_COMPONENT_RDMA2,
 154         DDP_COMPONENT_DSI3,
 155         DDP_COMPONENT_PWM2,
 156 };
 157
 158 static const enum mtk_ddp_comp_id mt8173_mtk_ddp_main[] = {
 159         DDP_COMPONENT_OVL0,
 160         DDP_COMPONENT_COLOR0,
 161         DDP_COMPONENT_AAL0,
 162         DDP_COMPONENT_OD0,
 163         DDP_COMPONENT_RDMA0,
 164         DDP_COMPONENT_UFOE,
 165         DDP_COMPONENT_DSI0,
 166         DDP_COMPONENT_PWM0,
 167 };
 168
 169 static const enum mtk_ddp_comp_id mt8173_mtk_ddp_ext[] = {
 170         DDP_COMPONENT_OVL1,
 171         DDP_COMPONENT_COLOR1,
 172         DDP_COMPONENT_GAMMA,
 173         DDP_COMPONENT_RDMA1,
 174         DDP_COMPONENT_DPI0,
 175 };
 176
 177 static const struct mtk_mmsys_driver_data mt2701_mmsys_driver_data = {
 178         .main_path = mt2701_mtk_ddp_main,
 179         .main_len = ARRAY_SIZE(mt2701_mtk_ddp_main),
 180         .ext_path = mt2701_mtk_ddp_ext,
 181         .ext_len = ARRAY_SIZE(mt2701_mtk_ddp_ext),
 182         .shadow_register = true,
 183 };
 184
 185 static const struct mtk_mmsys_driver_data mt2712_mmsys_driver_data = {
 186         .main_path = mt2712_mtk_ddp_main,
 187         .main_len = ARRAY_SIZE(mt2712_mtk_ddp_main),
 188         .ext_path = mt2712_mtk_ddp_ext,
 189         .ext_len = ARRAY_SIZE(mt2712_mtk_ddp_ext),
 190         .third_path = mt2712_mtk_ddp_third,
 191         .third_len = ARRAY_SIZE(mt2712_mtk_ddp_third),
 192 };
 193
 194 static const struct mtk_mmsys_driver_data mt8173_mmsys_driver_data = {
 195         .main_path = mt8173_mtk_ddp_main,
 196         .main_len = ARRAY_SIZE(mt8173_mtk_ddp_main),
 197         .ext_path = mt8173_mtk_ddp_ext,
 198         .ext_len = ARRAY_SIZE(mt8173_mtk_ddp_ext),
 199 };
 200
 201 static int mtk_drm_kms_init(struct drm_device *drm)
 202 {
 203         struct mtk_drm_private *private = drm->dev_private;
 204         struct platform_device *pdev;
 205         struct device_node *np;
 206         int ret;
 207
 208         if (!iommu_present(&platform_bus_type))
 209                 return -EPROBE_DEFER;
 210
 211         pdev = of_find_device_by_node(private->mutex_node);
 212         if (!pdev) {
 213                 dev_err(drm->dev, "Waiting for disp-mutex device %pOF\n",
 214                         private->mutex_node);
 215                 of_node_put(private->mutex_node);
 216                 return -EPROBE_DEFER;
 217         }
 218         private->mutex_dev = &pdev->dev;
 219
 220         drm_mode_config_init(drm);
 221
 222         drm->mode_config.min_width = 64;
 223         drm->mode_config.min_height = 64;
 224
 225         /*
 226          * set max width and height as default value(4096x4096).
 227          * this value would be used to check framebuffer size limitation
 228          * at drm_mode_addfb().
 229          */
 230         drm->mode_config.max_width = 4096;
 231         drm->mode_config.max_height = 4096;
 232         drm->mode_config.funcs = &mtk_drm_mode_config_funcs;
 233
 234         ret = component_bind_all(drm->dev, drm);
 235         if (ret)
 236                 goto err_config_cleanup;
 237
 238         /*
 239          * We currently support two fixed data streams, each optional,
 240          * and each statically assigned to a crtc:
 241          * OVL0 -> COLOR0 -> AAL -> OD -> RDMA0 -> UFOE -> DSI0 ...
 242          */
 243         ret = mtk_drm_crtc_create(drm, private->data->main_path,
 244                                   private->data->main_len);
 245         if (ret < 0)
 246                 goto err_component_unbind;
 247         /* ... and OVL1 -> COLOR1 -> GAMMA -> RDMA1 -> DPI0. */
 248         ret = mtk_drm_crtc_create(drm, private->data->ext_path,
 249                                   private->data->ext_len);
 250         if (ret < 0)
 251                 goto err_component_unbind;
 252
 253         ret = mtk_drm_crtc_create(drm, private->data->third_path,
 254                                   private->data->third_len);
 255         if (ret < 0)
 256                 goto err_component_unbind;
 257
 258         /* Use OVL device for all DMA memory allocations */
 259         np = private->comp_node[private->data->main_path[0]] ?:
 260              private->comp_node[private->data->ext_path[0]];
 261         pdev = of_find_device_by_node(np);
 262         if (!pdev) {
 263                 ret = -ENODEV;
 264                 dev_err(drm->dev, "Need at least one OVL device\n");
 265                 goto err_component_unbind;
 266         }
 267
 268         private->dma_dev = &pdev->dev;
 269
 270         /*
 271          * We don't use the drm_irq_install() helpers provided by the DRM
 272          * core, so we need to set this manually in order to allow the
 273          * DRM_IOCTL_WAIT_VBLANK to operate correctly.
 274          */
 275         drm->irq_enabled = true;
 276         ret = drm_vblank_init(drm, MAX_CRTC);
 277         if (ret < 0)
 278                 goto err_component_unbind;
 279
 280         drm_kms_helper_poll_init(drm);
 281         drm_mode_config_reset(drm);
 282
 283         return 0;
 284
 285 err_component_unbind:
 286         component_unbind_all(drm->dev, drm);
 287 err_config_cleanup:
 288         drm_mode_config_cleanup(drm);
 289
 290         return ret;
 291 }
 292
 293 static void mtk_drm_kms_deinit(struct drm_device *drm)
 294 {
 295         drm_kms_helper_poll_fini(drm);
 296         drm_atomic_helper_shutdown(drm);
 297
 298         component_unbind_all(drm->dev, drm);
 299         drm_mode_config_cleanup(drm);
 300 }
 301
 302 static const struct file_operations mtk_drm_fops = {
 303         .owner = THIS_MODULE,
 304         .open = drm_open,
 305         .release = drm_release,
 306         .unlocked_ioctl = drm_ioctl,
 307         .mmap = mtk_drm_gem_mmap,
 308         .poll = drm_poll,
 309         .read = drm_read,
 310         .compat_ioctl = drm_compat_ioctl,
 311 };
 312
 313 static struct drm_driver mtk_drm_driver = {
 314         .driver_features = DRIVER_MODESET | DRIVER_GEM | DRIVER_ATOMIC,
 315
 316         .gem_free_object_unlocked = mtk_drm_gem_free_object,
 317         .gem_vm_ops = &drm_gem_cma_vm_ops,
 318         .dumb_create = mtk_drm_gem_dumb_create,
 319
 320         .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
 321         .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
 322         .gem_prime_get_sg_table = mtk_gem_prime_get_sg_table,
 323         .gem_prime_import_sg_table = mtk_gem_prime_import_sg_table,
 324         .gem_prime_mmap = mtk_drm_gem_mmap_buf,
 325         .gem_prime_vmap = mtk_drm_gem_prime_vmap,
 326         .gem_prime_vunmap = mtk_drm_gem_prime_vunmap,
 327         .fops = &mtk_drm_fops,
 328
 329         .name = DRIVER_NAME,
 330         .desc = DRIVER_DESC,
 331         .date = DRIVER_DATE,
 332         .major = DRIVER_MAJOR,
 333         .minor = DRIVER_MINOR,
 334 };
 335
 336 static int compare_of(struct device *dev, void *data)
 337 {
 338         return dev->of_node == data;
 339 }
 340
 341 static int mtk_drm_bind(struct device *dev)
 342 {
 343         struct mtk_drm_private *private = dev_get_drvdata(dev);
 344         struct drm_device *drm;
 345         int ret;
 346
 347         drm = drm_dev_alloc(&mtk_drm_driver, dev);
 348         if (IS_ERR(drm))
 349                 return PTR_ERR(drm);
 350
 351         drm->dev_private = private;
 352         private->drm = drm;
 353
 354         ret = mtk_drm_kms_init(drm);
 355         if (ret < 0)
 356                 goto err_free;
 357
 358         ret = drm_dev_register(drm, 0);
 359         if (ret < 0)
 360                 goto err_deinit;
 361
 362         ret = drm_fbdev_generic_setup(drm, 32);
 363         if (ret)
 364                 DRM_ERROR("Failed to initialize fbdev: %d\n", ret);
 365
 366         return 0;
 367
 368 err_deinit:
 369         mtk_drm_kms_deinit(drm);
 370 err_free:
 371         drm_dev_put(drm);
 372         return ret;
 373 }
 374
 375 static void mtk_drm_unbind(struct device *dev)
 376 {
 377         struct mtk_drm_private *private = dev_get_drvdata(dev);
 378
 379         drm_dev_unregister(private->drm);
 380         mtk_drm_kms_deinit(private->drm);
 381         drm_dev_put(private->drm);
 382         private->num_pipes = 0;
 383         private->drm = NULL;
 384 }
 385
 386 static const struct component_master_ops mtk_drm_ops = {
 387         .bind           = mtk_drm_bind,
 388         .unbind         = mtk_drm_unbind,
 389 };
 390
 391 static const struct of_device_id mtk_ddp_comp_dt_ids[] = {
 392         { .compatible = "mediatek,mt2701-disp-ovl",
 393           .data = (void *)MTK_DISP_OVL },
 394         { .compatible = "mediatek,mt8173-disp-ovl",
 395           .data = (void *)MTK_DISP_OVL },
 396         { .compatible = "mediatek,mt2701-disp-rdma",
 397           .data = (void *)MTK_DISP_RDMA },
 398         { .compatible = "mediatek,mt8173-disp-rdma",
 399           .data = (void *)MTK_DISP_RDMA },
 400         { .compatible = "mediatek,mt8173-disp-wdma",
 401           .data = (void *)MTK_DISP_WDMA },
 402         { .compatible = "mediatek,mt2701-disp-color",
 403           .data = (void *)MTK_DISP_COLOR },
 404         { .compatible = "mediatek,mt8173-disp-color",
 405           .data = (void *)MTK_DISP_COLOR },
 406         { .compatible = "mediatek,mt8173-disp-aal",
 407           .data = (void *)MTK_DISP_AAL},
 408         { .compatible = "mediatek,mt8173-disp-gamma",
 409           .data = (void *)MTK_DISP_GAMMA, },
 410         { .compatible = "mediatek,mt8173-disp-ufoe",
 411           .data = (void *)MTK_DISP_UFOE },
 412         { .compatible = "mediatek,mt2701-dsi",
 413           .data = (void *)MTK_DSI },
 414         { .compatible = "mediatek,mt8173-dsi",
 415           .data = (void *)MTK_DSI },
 416         { .compatible = "mediatek,mt2701-dpi",
 417           .data = (void *)MTK_DPI },
 418         { .compatible = "mediatek,mt8173-dpi",
 419           .data = (void *)MTK_DPI },
 420         { .compatible = "mediatek,mt2701-disp-mutex",
 421           .data = (void *)MTK_DISP_MUTEX },
 422         { .compatible = "mediatek,mt2712-disp-mutex",
 423           .data = (void *)MTK_DISP_MUTEX },
 424         { .compatible = "mediatek,mt8173-disp-mutex",
 425           .data = (void *)MTK_DISP_MUTEX },
 426         { .compatible = "mediatek,mt2701-disp-pwm",
 427           .data = (void *)MTK_DISP_BLS },
 428         { .compatible = "mediatek,mt8173-disp-pwm",
 429           .data = (void *)MTK_DISP_PWM },
 430         { .compatible = "mediatek,mt8173-disp-od",
 431           .data = (void *)MTK_DISP_OD },
 432         { }
 433 };
 434
 435 static int mtk_drm_probe(struct platform_device *pdev)
 436 {
 437         struct device *dev = &pdev->dev;
 438         struct mtk_drm_private *private;
 439         struct resource *mem;
 440         struct device_node *node;
 441         struct component_match *match = NULL;
 442         int ret;
 443         int i;
 444
 445         private = devm_kzalloc(dev, sizeof(*private), GFP_KERNEL);
 446         if (!private)
 447                 return -ENOMEM;
 448
 449         mutex_init(&private->commit.lock);
 450         INIT_WORK(&private->commit.work, mtk_atomic_work);
 451         private->data = of_device_get_match_data(dev);
 452
 453         mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 454         private->config_regs = devm_ioremap_resource(dev, mem);
 455         if (IS_ERR(private->config_regs)) {
 456                 ret = PTR_ERR(private->config_regs);
 457                 dev_err(dev, "Failed to ioremap mmsys-config resource: %d\n",
 458                         ret);
 459                 return ret;
 460         }
 461
 462         /* Iterate over sibling DISP function blocks */
 463         for_each_child_of_node(dev->of_node->parent, node) {
 464                 const struct of_device_id *of_id;
 465                 enum mtk_ddp_comp_type comp_type;
 466                 int comp_id;
 467
 468                 of_id = of_match_node(mtk_ddp_comp_dt_ids, node);
 469                 if (!of_id)
 470                         continue;
 471
 472                 if (!of_device_is_available(node)) {
 473                         dev_dbg(dev, "Skipping disabled component %pOF\n",
 474                                 node);
 475                         continue;
 476                 }
 477
 478                 comp_type = (enum mtk_ddp_comp_type)of_id->data;
 479
 480                 if (comp_type == MTK_DISP_MUTEX) {
 481                         private->mutex_node = of_node_get(node);
 482                         continue;
 483                 }
 484
 485                 comp_id = mtk_ddp_comp_get_id(node, comp_type);
 486                 if (comp_id < 0) {
 487                         dev_warn(dev, "Skipping unknown component %pOF\n",
 488                                  node);
 489                         continue;
 490                 }
 491
 492                 private->comp_node[comp_id] = of_node_get(node);
 493
 494                 /*
 495                  * Currently only the COLOR, OVL, RDMA, DSI, and DPI blocks have
 496                  * separate component platform drivers and initialize their own
 497                  * DDP component structure. The others are initialized here.
 498                  */
 499                 if (comp_type == MTK_DISP_COLOR ||
 500                     comp_type == MTK_DISP_OVL ||
 501                     comp_type == MTK_DISP_RDMA ||
 502                     comp_type == MTK_DSI ||
 503                     comp_type == MTK_DPI) {
 504                         dev_info(dev, "Adding component match for %pOF\n",
 505                                  node);
 506                         drm_of_component_match_add(dev, &match, compare_of,
 507                                                    node);
 508                 } else {
 509                         struct mtk_ddp_comp *comp;
 510
 511                         comp = devm_kzalloc(dev, sizeof(*comp), GFP_KERNEL);
 512                         if (!comp) {
 513                                 ret = -ENOMEM;
 514                                 goto err_node;
 515                         }
 516
 517                         ret = mtk_ddp_comp_init(dev, node, comp, comp_id, NULL);
 518                         if (ret)
 519                                 goto err_node;
 520
 521                         private->ddp_comp[comp_id] = comp;
 522                 }
 523         }
 524
 525         if (!private->mutex_node) {
 526                 dev_err(dev, "Failed to find disp-mutex node\n");
 527                 ret = -ENODEV;
 528                 goto err_node;
 529         }
 530
 531         pm_runtime_enable(dev);
 532
 533         platform_set_drvdata(pdev, private);
 534
 535         ret = component_master_add_with_match(dev, &mtk_drm_ops, match);
 536         if (ret)
 537                 goto err_pm;
 538
 539         return 0;
 540
 541 err_pm:
 542         pm_runtime_disable(dev);
 543 err_node:
 544         of_node_put(private->mutex_node);
 545         for (i = 0; i < DDP_COMPONENT_ID_MAX; i++)
 546                 of_node_put(private->comp_node[i]);
 547         return ret;
 548 }
 549
 550 static int mtk_drm_remove(struct platform_device *pdev)
 551 {
 552         struct mtk_drm_private *private = platform_get_drvdata(pdev);
 553         int i;
 554
 555         component_master_del(&pdev->dev, &mtk_drm_ops);
 556         pm_runtime_disable(&pdev->dev);
 557         of_node_put(private->mutex_node);
 558         for (i = 0; i < DDP_COMPONENT_ID_MAX; i++)
 559                 of_node_put(private->comp_node[i]);
 560
 561         return 0;
 562 }
 563
 564 #ifdef CONFIG_PM_SLEEP
 565 static int mtk_drm_sys_suspend(struct device *dev)
 566 {
 567         struct mtk_drm_private *private = dev_get_drvdata(dev);
 568         struct drm_device *drm = private->drm;
 569         int ret;
 570
 571         ret = drm_mode_config_helper_suspend(drm);
 572         DRM_DEBUG_DRIVER("mtk_drm_sys_suspend\n");
 573
 574         return ret;
 575 }
 576
 577 static int mtk_drm_sys_resume(struct device *dev)
 578 {
 579         struct mtk_drm_private *private = dev_get_drvdata(dev);
 580         struct drm_device *drm = private->drm;
 581         int ret;
 582
 583         ret = drm_mode_config_helper_resume(drm);
 584         DRM_DEBUG_DRIVER("mtk_drm_sys_resume\n");
 585
 586         return ret;
 587 }
 588 #endif
 589
 590 static SIMPLE_DEV_PM_OPS(mtk_drm_pm_ops, mtk_drm_sys_suspend,
 591                          mtk_drm_sys_resume);
 592
 593 static const struct of_device_id mtk_drm_of_ids[] = {
 594         { .compatible = "mediatek,mt2701-mmsys",
 595           .data = &mt2701_mmsys_driver_data},
 596         { .compatible = "mediatek,mt2712-mmsys",
 597           .data = &mt2712_mmsys_driver_data},
 598         { .compatible = "mediatek,mt8173-mmsys",
 599           .data = &mt8173_mmsys_driver_data},
 600         { }
 601 };
 602
 603 static struct platform_driver mtk_drm_platform_driver = {
 604         .probe  = mtk_drm_probe,
 605         .remove = mtk_drm_remove,
 606         .driver = {
 607                 .name   = "mediatek-drm",
 608                 .of_match_table = mtk_drm_of_ids,
 609                 .pm     = &mtk_drm_pm_ops,
 610         },
 611 };
 612
 613 static struct platform_driver * const mtk_drm_drivers[] = {
 614         &mtk_ddp_driver,
 615         &mtk_disp_color_driver,
 616         &mtk_disp_ovl_driver,
 617         &mtk_disp_rdma_driver,
 618         &mtk_dpi_driver,
 619         &mtk_drm_platform_driver,
 620         &mtk_dsi_driver,
 621         &mtk_mipi_tx_driver,
 622 };
 623
 624 static int __init mtk_drm_init(void)
 625 {
 626         return platform_register_drivers(mtk_drm_drivers,
 627                                          ARRAY_SIZE(mtk_drm_drivers));
 628 }
 629
 630 static void __exit mtk_drm_exit(void)
 631 {
 632         platform_unregister_drivers(mtk_drm_drivers,
 633                                     ARRAY_SIZE(mtk_drm_drivers));
 634 }
 635
 636 module_init(mtk_drm_init);
 637 module_exit(mtk_drm_exit);
 638
 639 MODULE_AUTHOR("YT SHEN <yt.shen@mediatek.com>");
 640 MODULE_DESCRIPTION("Mediatek SoC DRM driver");
 641 MODULE_LICENSE("GPL v2");