drivers/gpu/drm/mediatek/mtk_drm_drv.c

   1 /*
   2  * Copyright (c) 2015 MediaTek Inc.
   3  * Author: YT SHEN <yt.shen@mediatek.com>
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License version 2 as
   7  * published by the Free Software Foundation.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  */
  14
  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 #include <drm/drm_gem.h>
  20 #include <drm/drm_gem_cma_helper.h>
  21 #include <linux/component.h>
  22 #include <linux/iommu.h>
  23 #include <linux/of_address.h>
  24 #include <linux/of_platform.h>
  25 #include <linux/pm_runtime.h>
  26
  27 #include "mtk_drm_crtc.h"
  28 #include "mtk_drm_ddp.h"
  29 #include "mtk_drm_ddp_comp.h"
  30 #include "mtk_drm_drv.h"
  31 #include "mtk_drm_fb.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 void mtk_atomic_schedule(struct mtk_drm_private *private,
  41                                 struct drm_atomic_state *state)
  42 {
  43         private->commit.state = state;
  44         schedule_work(&private->commit.work);
  45 }
  46
  47 static void mtk_atomic_wait_for_fences(struct drm_atomic_state *state)
  48 {
  49         struct drm_plane *plane;
  50         struct drm_plane_state *plane_state;
  51         int i;
  52
  53         for_each_plane_in_state(state, plane, plane_state, i)
  54                 mtk_fb_wait(plane->state->fb);
  55 }
  56
  57 static void mtk_atomic_complete(struct mtk_drm_private *private,
  58                                 struct drm_atomic_state *state)
  59 {
  60         struct drm_device *drm = private->drm;
  61
  62         mtk_atomic_wait_for_fences(state);
  63
  64         drm_atomic_helper_commit_modeset_disables(drm, state);
  65         drm_atomic_helper_commit_planes(drm, state, false);
  66         drm_atomic_helper_commit_modeset_enables(drm, state);
  67         drm_atomic_helper_wait_for_vblanks(drm, state);
  68         drm_atomic_helper_cleanup_planes(drm, state);
  69         drm_atomic_state_free(state);
  70 }
  71
  72 static void mtk_atomic_work(struct work_struct *work)
  73 {
  74         struct mtk_drm_private *private = container_of(work,
  75                         struct mtk_drm_private, commit.work);
  76
  77         mtk_atomic_complete(private, private->commit.state);
  78 }
  79
  80 static int mtk_atomic_commit(struct drm_device *drm,
  81                              struct drm_atomic_state *state,
  82                              bool async)
  83 {
  84         struct mtk_drm_private *private = drm->dev_private;
  85         int ret;
  86
  87         ret = drm_atomic_helper_prepare_planes(drm, state);
  88         if (ret)
  89                 return ret;
  90
  91         mutex_lock(&private->commit.lock);
  92         flush_work(&private->commit.work);
  93
  94         drm_atomic_helper_swap_state(state, true);
  95
  96         if (async)
  97                 mtk_atomic_schedule(private, state);
  98         else
  99                 mtk_atomic_complete(private, state);
 100
 101         mutex_unlock(&private->commit.lock);
 102
 103         return 0;
 104 }
 105
 106 static const struct drm_mode_config_funcs mtk_drm_mode_config_funcs = {
 107         .fb_create = mtk_drm_mode_fb_create,
 108         .atomic_check = drm_atomic_helper_check,
 109         .atomic_commit = mtk_atomic_commit,
 110 };
 111
 112 static const enum mtk_ddp_comp_id mtk_ddp_main[] = {
 113         DDP_COMPONENT_OVL0,
 114         DDP_COMPONENT_COLOR0,
 115         DDP_COMPONENT_AAL,
 116         DDP_COMPONENT_OD,
 117         DDP_COMPONENT_RDMA0,
 118         DDP_COMPONENT_UFOE,
 119         DDP_COMPONENT_DSI0,
 120         DDP_COMPONENT_PWM0,
 121 };
 122
 123 static const enum mtk_ddp_comp_id mtk_ddp_ext[] = {
 124         DDP_COMPONENT_OVL1,
 125         DDP_COMPONENT_COLOR1,
 126         DDP_COMPONENT_GAMMA,
 127         DDP_COMPONENT_RDMA1,
 128         DDP_COMPONENT_DPI0,
 129 };
 130
 131 static int mtk_drm_kms_init(struct drm_device *drm)
 132 {
 133         struct mtk_drm_private *private = drm->dev_private;
 134         struct platform_device *pdev;
 135         struct device_node *np;
 136         int ret;
 137
 138         if (!iommu_present(&platform_bus_type))
 139                 return -EPROBE_DEFER;
 140
 141         pdev = of_find_device_by_node(private->mutex_node);
 142         if (!pdev) {
 143                 dev_err(drm->dev, "Waiting for disp-mutex device %s\n",
 144                         private->mutex_node->full_name);
 145                 of_node_put(private->mutex_node);
 146                 return -EPROBE_DEFER;
 147         }
 148         private->mutex_dev = &pdev->dev;
 149
 150         drm_mode_config_init(drm);
 151
 152         drm->mode_config.min_width = 64;
 153         drm->mode_config.min_height = 64;
 154
 155         /*
 156          * set max width and height as default value(4096x4096).
 157          * this value would be used to check framebuffer size limitation
 158          * at drm_mode_addfb().
 159          */
 160         drm->mode_config.max_width = 4096;
 161         drm->mode_config.max_height = 4096;
 162         drm->mode_config.funcs = &mtk_drm_mode_config_funcs;
 163
 164         ret = component_bind_all(drm->dev, drm);
 165         if (ret)
 166                 goto err_config_cleanup;
 167
 168         /*
 169          * We currently support two fixed data streams, each optional,
 170          * and each statically assigned to a crtc:
 171          * OVL0 -> COLOR0 -> AAL -> OD -> RDMA0 -> UFOE -> DSI0 ...
 172          */
 173         ret = mtk_drm_crtc_create(drm, mtk_ddp_main, ARRAY_SIZE(mtk_ddp_main));
 174         if (ret < 0)
 175                 goto err_component_unbind;
 176         /* ... and OVL1 -> COLOR1 -> GAMMA -> RDMA1 -> DPI0. */
 177         ret = mtk_drm_crtc_create(drm, mtk_ddp_ext, ARRAY_SIZE(mtk_ddp_ext));
 178         if (ret < 0)
 179                 goto err_component_unbind;
 180
 181         /* Use OVL device for all DMA memory allocations */
 182         np = private->comp_node[mtk_ddp_main[0]] ?:
 183              private->comp_node[mtk_ddp_ext[0]];
 184         pdev = of_find_device_by_node(np);
 185         if (!pdev) {
 186                 ret = -ENODEV;
 187                 dev_err(drm->dev, "Need at least one OVL device\n");
 188                 goto err_component_unbind;
 189         }
 190
 191         private->dma_dev = &pdev->dev;
 192
 193         /*
 194          * We don't use the drm_irq_install() helpers provided by the DRM
 195          * core, so we need to set this manually in order to allow the
 196          * DRM_IOCTL_WAIT_VBLANK to operate correctly.
 197          */
 198         drm->irq_enabled = true;
 199         ret = drm_vblank_init(drm, MAX_CRTC);
 200         if (ret < 0)
 201                 goto err_component_unbind;
 202
 203         drm_kms_helper_poll_init(drm);
 204         drm_mode_config_reset(drm);
 205
 206         return 0;
 207
 208 err_component_unbind:
 209         component_unbind_all(drm->dev, drm);
 210 err_config_cleanup:
 211         drm_mode_config_cleanup(drm);
 212
 213         return ret;
 214 }
 215
 216 static void mtk_drm_kms_deinit(struct drm_device *drm)
 217 {
 218         drm_kms_helper_poll_fini(drm);
 219
 220         drm_vblank_cleanup(drm);
 221         component_unbind_all(drm->dev, drm);
 222         drm_mode_config_cleanup(drm);
 223 }
 224
 225 static const struct file_operations mtk_drm_fops = {
 226         .owner = THIS_MODULE,
 227         .open = drm_open,
 228         .release = drm_release,
 229         .unlocked_ioctl = drm_ioctl,
 230         .mmap = mtk_drm_gem_mmap,
 231         .poll = drm_poll,
 232         .read = drm_read,
 233 #ifdef CONFIG_COMPAT
 234         .compat_ioctl = drm_compat_ioctl,
 235 #endif
 236 };
 237
 238 static struct drm_driver mtk_drm_driver = {
 239         .driver_features = DRIVER_MODESET | DRIVER_GEM | DRIVER_PRIME |
 240                            DRIVER_ATOMIC,
 241
 242         .get_vblank_counter = drm_vblank_count,
 243         .enable_vblank = mtk_drm_crtc_enable_vblank,
 244         .disable_vblank = mtk_drm_crtc_disable_vblank,
 245
 246         .gem_free_object_unlocked = mtk_drm_gem_free_object,
 247         .gem_vm_ops = &drm_gem_cma_vm_ops,
 248         .dumb_create = mtk_drm_gem_dumb_create,
 249         .dumb_map_offset = mtk_drm_gem_dumb_map_offset,
 250         .dumb_destroy = drm_gem_dumb_destroy,
 251
 252         .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
 253         .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
 254         .gem_prime_export = drm_gem_prime_export,
 255         .gem_prime_import = drm_gem_prime_import,
 256         .gem_prime_get_sg_table = mtk_gem_prime_get_sg_table,
 257         .gem_prime_import_sg_table = mtk_gem_prime_import_sg_table,
 258         .gem_prime_mmap = mtk_drm_gem_mmap_buf,
 259         .fops = &mtk_drm_fops,
 260
 261         .name = DRIVER_NAME,
 262         .desc = DRIVER_DESC,
 263         .date = DRIVER_DATE,
 264         .major = DRIVER_MAJOR,
 265         .minor = DRIVER_MINOR,
 266 };
 267
 268 static int compare_of(struct device *dev, void *data)
 269 {
 270         return dev->of_node == data;
 271 }
 272
 273 static int mtk_drm_bind(struct device *dev)
 274 {
 275         struct mtk_drm_private *private = dev_get_drvdata(dev);
 276         struct drm_device *drm;
 277         int ret;
 278
 279         drm = drm_dev_alloc(&mtk_drm_driver, dev);
 280         if (!drm)
 281                 return -ENOMEM;
 282
 283         drm->dev_private = private;
 284         private->drm = drm;
 285
 286         ret = mtk_drm_kms_init(drm);
 287         if (ret < 0)
 288                 goto err_free;
 289
 290         ret = drm_dev_register(drm, 0);
 291         if (ret < 0)
 292                 goto err_deinit;
 293
 294         return 0;
 295
 296 err_deinit:
 297         mtk_drm_kms_deinit(drm);
 298 err_free:
 299         drm_dev_unref(drm);
 300         return ret;
 301 }
 302
 303 static void mtk_drm_unbind(struct device *dev)
 304 {
 305         struct mtk_drm_private *private = dev_get_drvdata(dev);
 306
 307         drm_put_dev(private->drm);
 308         private->drm = NULL;
 309 }
 310
 311 static const struct component_master_ops mtk_drm_ops = {
 312         .bind           = mtk_drm_bind,
 313         .unbind         = mtk_drm_unbind,
 314 };
 315
 316 static const struct of_device_id mtk_ddp_comp_dt_ids[] = {
 317         { .compatible = "mediatek,mt8173-disp-ovl",   .data = (void *)MTK_DISP_OVL },
 318         { .compatible = "mediatek,mt8173-disp-rdma",  .data = (void *)MTK_DISP_RDMA },
 319         { .compatible = "mediatek,mt8173-disp-wdma",  .data = (void *)MTK_DISP_WDMA },
 320         { .compatible = "mediatek,mt8173-disp-color", .data = (void *)MTK_DISP_COLOR },
 321         { .compatible = "mediatek,mt8173-disp-aal",   .data = (void *)MTK_DISP_AAL},
 322         { .compatible = "mediatek,mt8173-disp-gamma", .data = (void *)MTK_DISP_GAMMA, },
 323         { .compatible = "mediatek,mt8173-disp-ufoe",  .data = (void *)MTK_DISP_UFOE },
 324         { .compatible = "mediatek,mt8173-dsi",        .data = (void *)MTK_DSI },
 325         { .compatible = "mediatek,mt8173-dpi",        .data = (void *)MTK_DPI },
 326         { .compatible = "mediatek,mt8173-disp-mutex", .data = (void *)MTK_DISP_MUTEX },
 327         { .compatible = "mediatek,mt8173-disp-pwm",   .data = (void *)MTK_DISP_PWM },
 328         { .compatible = "mediatek,mt8173-disp-od",    .data = (void *)MTK_DISP_OD },
 329         { }
 330 };
 331
 332 static int mtk_drm_probe(struct platform_device *pdev)
 333 {
 334         struct device *dev = &pdev->dev;
 335         struct mtk_drm_private *private;
 336         struct resource *mem;
 337         struct device_node *node;
 338         struct component_match *match = NULL;
 339         int ret;
 340         int i;
 341
 342         private = devm_kzalloc(dev, sizeof(*private), GFP_KERNEL);
 343         if (!private)
 344                 return -ENOMEM;
 345
 346         mutex_init(&private->commit.lock);
 347         INIT_WORK(&private->commit.work, mtk_atomic_work);
 348
 349         mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 350         private->config_regs = devm_ioremap_resource(dev, mem);
 351         if (IS_ERR(private->config_regs)) {
 352                 ret = PTR_ERR(private->config_regs);
 353                 dev_err(dev, "Failed to ioremap mmsys-config resource: %d\n",
 354                         ret);
 355                 return ret;
 356         }
 357
 358         /* Iterate over sibling DISP function blocks */
 359         for_each_child_of_node(dev->of_node->parent, node) {
 360                 const struct of_device_id *of_id;
 361                 enum mtk_ddp_comp_type comp_type;
 362                 int comp_id;
 363
 364                 of_id = of_match_node(mtk_ddp_comp_dt_ids, node);
 365                 if (!of_id)
 366                         continue;
 367
 368                 if (!of_device_is_available(node)) {
 369                         dev_dbg(dev, "Skipping disabled component %s\n",
 370                                 node->full_name);
 371                         continue;
 372                 }
 373
 374                 comp_type = (enum mtk_ddp_comp_type)of_id->data;
 375
 376                 if (comp_type == MTK_DISP_MUTEX) {
 377                         private->mutex_node = of_node_get(node);
 378                         continue;
 379                 }
 380
 381                 comp_id = mtk_ddp_comp_get_id(node, comp_type);
 382                 if (comp_id < 0) {
 383                         dev_warn(dev, "Skipping unknown component %s\n",
 384                                  node->full_name);
 385                         continue;
 386                 }
 387
 388                 private->comp_node[comp_id] = of_node_get(node);
 389
 390                 /*
 391                  * Currently only the OVL, RDMA, DSI, and DPI blocks have
 392                  * separate component platform drivers and initialize their own
 393                  * DDP component structure. The others are initialized here.
 394                  */
 395                 if (comp_type == MTK_DISP_OVL ||
 396                     comp_type == MTK_DISP_RDMA ||
 397                     comp_type == MTK_DSI ||
 398                     comp_type == MTK_DPI) {
 399                         dev_info(dev, "Adding component match for %s\n",
 400                                  node->full_name);
 401                         component_match_add(dev, &match, compare_of, node);
 402                 } else {
 403                         struct mtk_ddp_comp *comp;
 404
 405                         comp = devm_kzalloc(dev, sizeof(*comp), GFP_KERNEL);
 406                         if (!comp) {
 407                                 ret = -ENOMEM;
 408                                 goto err_node;
 409                         }
 410
 411                         ret = mtk_ddp_comp_init(dev, node, comp, comp_id, NULL);
 412                         if (ret)
 413                                 goto err_node;
 414
 415                         private->ddp_comp[comp_id] = comp;
 416                 }
 417         }
 418
 419         if (!private->mutex_node) {
 420                 dev_err(dev, "Failed to find disp-mutex node\n");
 421                 ret = -ENODEV;
 422                 goto err_node;
 423         }
 424
 425         pm_runtime_enable(dev);
 426
 427         platform_set_drvdata(pdev, private);
 428
 429         ret = component_master_add_with_match(dev, &mtk_drm_ops, match);
 430         if (ret)
 431                 goto err_pm;
 432
 433         return 0;
 434
 435 err_pm:
 436         pm_runtime_disable(dev);
 437 err_node:
 438         of_node_put(private->mutex_node);
 439         for (i = 0; i < DDP_COMPONENT_ID_MAX; i++)
 440                 of_node_put(private->comp_node[i]);
 441         return ret;
 442 }
 443
 444 static int mtk_drm_remove(struct platform_device *pdev)
 445 {
 446         struct mtk_drm_private *private = platform_get_drvdata(pdev);
 447         struct drm_device *drm = private->drm;
 448         int i;
 449
 450         drm_dev_unregister(drm);
 451         mtk_drm_kms_deinit(drm);
 452         drm_dev_unref(drm);
 453
 454         component_master_del(&pdev->dev, &mtk_drm_ops);
 455         pm_runtime_disable(&pdev->dev);
 456         of_node_put(private->mutex_node);
 457         for (i = 0; i < DDP_COMPONENT_ID_MAX; i++)
 458                 of_node_put(private->comp_node[i]);
 459
 460         return 0;
 461 }
 462
 463 #ifdef CONFIG_PM_SLEEP
 464 static int mtk_drm_sys_suspend(struct device *dev)
 465 {
 466         struct mtk_drm_private *private = dev_get_drvdata(dev);
 467         struct drm_device *drm = private->drm;
 468
 469         drm_kms_helper_poll_disable(drm);
 470
 471         private->suspend_state = drm_atomic_helper_suspend(drm);
 472         if (IS_ERR(private->suspend_state)) {
 473                 drm_kms_helper_poll_enable(drm);
 474                 return PTR_ERR(private->suspend_state);
 475         }
 476
 477         DRM_DEBUG_DRIVER("mtk_drm_sys_suspend\n");
 478         return 0;
 479 }
 480
 481 static int mtk_drm_sys_resume(struct device *dev)
 482 {
 483         struct mtk_drm_private *private = dev_get_drvdata(dev);
 484         struct drm_device *drm = private->drm;
 485
 486         drm_atomic_helper_resume(drm, private->suspend_state);
 487         drm_kms_helper_poll_enable(drm);
 488
 489         DRM_DEBUG_DRIVER("mtk_drm_sys_resume\n");
 490         return 0;
 491 }
 492 #endif
 493
 494 static SIMPLE_DEV_PM_OPS(mtk_drm_pm_ops, mtk_drm_sys_suspend,
 495                          mtk_drm_sys_resume);
 496
 497 static const struct of_device_id mtk_drm_of_ids[] = {
 498         { .compatible = "mediatek,mt8173-mmsys", },
 499         { }
 500 };
 501
 502 static struct platform_driver mtk_drm_platform_driver = {
 503         .probe  = mtk_drm_probe,
 504         .remove = mtk_drm_remove,
 505         .driver = {
 506                 .name   = "mediatek-drm",
 507                 .of_match_table = mtk_drm_of_ids,
 508                 .pm     = &mtk_drm_pm_ops,
 509         },
 510 };
 511
 512 static struct platform_driver * const mtk_drm_drivers[] = {
 513         &mtk_ddp_driver,
 514         &mtk_disp_ovl_driver,
 515         &mtk_disp_rdma_driver,
 516         &mtk_dpi_driver,
 517         &mtk_drm_platform_driver,
 518         &mtk_dsi_driver,
 519         &mtk_mipi_tx_driver,
 520 };
 521
 522 static int __init mtk_drm_init(void)
 523 {
 524         int ret;
 525         int i;
 526
 527         for (i = 0; i < ARRAY_SIZE(mtk_drm_drivers); i++) {
 528                 ret = platform_driver_register(mtk_drm_drivers[i]);
 529                 if (ret < 0) {
 530                         pr_err("Failed to register %s driver: %d\n",
 531                                mtk_drm_drivers[i]->driver.name, ret);
 532                         goto err;
 533                 }
 534         }
 535
 536         return 0;
 537
 538 err:
 539         while (--i >= 0)
 540                 platform_driver_unregister(mtk_drm_drivers[i]);
 541
 542         return ret;
 543 }
 544
 545 static void __exit mtk_drm_exit(void)
 546 {
 547         int i;
 548
 549         for (i = ARRAY_SIZE(mtk_drm_drivers) - 1; i >= 0; i--)
 550                 platform_driver_unregister(mtk_drm_drivers[i]);
 551 }
 552
 553 module_init(mtk_drm_init);
 554 module_exit(mtk_drm_exit);
 555
 556 MODULE_AUTHOR("YT SHEN <yt.shen@mediatek.com>");
 557 MODULE_DESCRIPTION("Mediatek SoC DRM driver");
 558 MODULE_LICENSE("GPL v2");