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 #include <drm/drm_fb_helper.h>
  20
  21 #include <linux/component.h>
  22
  23 #include <drm/exynos_drm.h>
  24
  25 #include "exynos_drm_drv.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_ipp.h"
  31 #include "exynos_drm_vidi.h"
  32 #include "exynos_drm_g2d.h"
  33 #include "exynos_drm_iommu.h"
  34
  35 #define DRIVER_NAME     "exynos"
  36 #define DRIVER_DESC     "Samsung SoC DRM"
  37 #define DRIVER_DATE     "20180330"
  38
  39 /*
  40  * Interface history:
  41  *
  42  * 1.0 - Original version
  43  * 1.1 - Upgrade IPP driver to version 2.0
  44  */
  45 #define DRIVER_MAJOR    1
  46 #define DRIVER_MINOR    1
  47
  48 int exynos_atomic_check(struct drm_device *dev,
  49                         struct drm_atomic_state *state)
  50 {
  51         int ret;
  52
  53         ret = drm_atomic_helper_check_modeset(dev, state);
  54         if (ret)
  55                 return ret;
  56
  57         ret = drm_atomic_normalize_zpos(dev, state);
  58         if (ret)
  59                 return ret;
  60
  61         ret = drm_atomic_helper_check_planes(dev, state);
  62         if (ret)
  63                 return ret;
  64
  65         return ret;
  66 }
  67
  68 static int exynos_drm_open(struct drm_device *dev, struct drm_file *file)
  69 {
  70         struct drm_exynos_file_private *file_priv;
  71         int ret;
  72
  73         file_priv = kzalloc(sizeof(*file_priv), GFP_KERNEL);
  74         if (!file_priv)
  75                 return -ENOMEM;
  76
  77         file->driver_priv = file_priv;
  78
  79         ret = exynos_drm_subdrv_open(dev, file);
  80         if (ret)
  81                 goto err_file_priv_free;
  82
  83         return ret;
  84
  85 err_file_priv_free:
  86         kfree(file_priv);
  87         file->driver_priv = NULL;
  88         return ret;
  89 }
  90
  91 static void exynos_drm_postclose(struct drm_device *dev, struct drm_file *file)
  92 {
  93         exynos_drm_subdrv_close(dev, file);
  94         kfree(file->driver_priv);
  95         file->driver_priv = NULL;
  96 }
  97
  98 static const struct vm_operations_struct exynos_drm_gem_vm_ops = {
  99         .fault = exynos_drm_gem_fault,
 100         .open = drm_gem_vm_open,
 101         .close = drm_gem_vm_close,
 102 };
 103
 104 static const struct drm_ioctl_desc exynos_ioctls[] = {
 105         DRM_IOCTL_DEF_DRV(EXYNOS_GEM_CREATE, exynos_drm_gem_create_ioctl,
 106                         DRM_AUTH | DRM_RENDER_ALLOW),
 107         DRM_IOCTL_DEF_DRV(EXYNOS_GEM_MAP, exynos_drm_gem_map_ioctl,
 108                         DRM_AUTH | DRM_RENDER_ALLOW),
 109         DRM_IOCTL_DEF_DRV(EXYNOS_GEM_GET, exynos_drm_gem_get_ioctl,
 110                         DRM_RENDER_ALLOW),
 111         DRM_IOCTL_DEF_DRV(EXYNOS_VIDI_CONNECTION, vidi_connection_ioctl,
 112                         DRM_AUTH),
 113         DRM_IOCTL_DEF_DRV(EXYNOS_G2D_GET_VER, exynos_g2d_get_ver_ioctl,
 114                         DRM_AUTH | DRM_RENDER_ALLOW),
 115         DRM_IOCTL_DEF_DRV(EXYNOS_G2D_SET_CMDLIST, exynos_g2d_set_cmdlist_ioctl,
 116                         DRM_AUTH | DRM_RENDER_ALLOW),
 117         DRM_IOCTL_DEF_DRV(EXYNOS_G2D_EXEC, exynos_g2d_exec_ioctl,
 118                         DRM_AUTH | DRM_RENDER_ALLOW),
 119         DRM_IOCTL_DEF_DRV(EXYNOS_IPP_GET_RESOURCES,
 120                         exynos_drm_ipp_get_res_ioctl,
 121                         DRM_AUTH | DRM_RENDER_ALLOW),
 122         DRM_IOCTL_DEF_DRV(EXYNOS_IPP_GET_CAPS, exynos_drm_ipp_get_caps_ioctl,
 123                         DRM_AUTH | DRM_RENDER_ALLOW),
 124         DRM_IOCTL_DEF_DRV(EXYNOS_IPP_GET_LIMITS,
 125                         exynos_drm_ipp_get_limits_ioctl,
 126                         DRM_AUTH | DRM_RENDER_ALLOW),
 127         DRM_IOCTL_DEF_DRV(EXYNOS_IPP_COMMIT, exynos_drm_ipp_commit_ioctl,
 128                         DRM_AUTH | DRM_RENDER_ALLOW),
 129 };
 130
 131 static const struct file_operations exynos_drm_driver_fops = {
 132         .owner          = THIS_MODULE,
 133         .open           = drm_open,
 134         .mmap           = exynos_drm_gem_mmap,
 135         .poll           = drm_poll,
 136         .read           = drm_read,
 137         .unlocked_ioctl = drm_ioctl,
 138         .compat_ioctl = drm_compat_ioctl,
 139         .release        = drm_release,
 140 };
 141
 142 static struct drm_driver exynos_drm_driver = {
 143         .driver_features        = DRIVER_MODESET | DRIVER_GEM | DRIVER_PRIME
 144                                   | DRIVER_ATOMIC | DRIVER_RENDER,
 145         .open                   = exynos_drm_open,
 146         .lastclose              = drm_fb_helper_lastclose,
 147         .postclose              = exynos_drm_postclose,
 148         .gem_free_object_unlocked = exynos_drm_gem_free_object,
 149         .gem_vm_ops             = &exynos_drm_gem_vm_ops,
 150         .dumb_create            = exynos_drm_gem_dumb_create,
 151         .prime_handle_to_fd     = drm_gem_prime_handle_to_fd,
 152         .prime_fd_to_handle     = drm_gem_prime_fd_to_handle,
 153         .gem_prime_export       = drm_gem_prime_export,
 154         .gem_prime_import       = exynos_drm_gem_prime_import,
 155         .gem_prime_get_sg_table = exynos_drm_gem_prime_get_sg_table,
 156         .gem_prime_import_sg_table      = exynos_drm_gem_prime_import_sg_table,
 157         .gem_prime_vmap         = exynos_drm_gem_prime_vmap,
 158         .gem_prime_vunmap       = exynos_drm_gem_prime_vunmap,
 159         .gem_prime_mmap         = exynos_drm_gem_prime_mmap,
 160         .ioctls                 = exynos_ioctls,
 161         .num_ioctls             = ARRAY_SIZE(exynos_ioctls),
 162         .fops                   = &exynos_drm_driver_fops,
 163         .name   = DRIVER_NAME,
 164         .desc   = DRIVER_DESC,
 165         .date   = DRIVER_DATE,
 166         .major  = DRIVER_MAJOR,
 167         .minor  = DRIVER_MINOR,
 168 };
 169
 170 #ifdef CONFIG_PM_SLEEP
 171 static int exynos_drm_suspend(struct device *dev)
 172 {
 173         struct drm_device *drm_dev = dev_get_drvdata(dev);
 174         struct exynos_drm_private *private;
 175
 176         if (pm_runtime_suspended(dev) || !drm_dev)
 177                 return 0;
 178
 179         private = drm_dev->dev_private;
 180
 181         drm_kms_helper_poll_disable(drm_dev);
 182         exynos_drm_fbdev_suspend(drm_dev);
 183         private->suspend_state = drm_atomic_helper_suspend(drm_dev);
 184         if (IS_ERR(private->suspend_state)) {
 185                 exynos_drm_fbdev_resume(drm_dev);
 186                 drm_kms_helper_poll_enable(drm_dev);
 187                 return PTR_ERR(private->suspend_state);
 188         }
 189
 190         return 0;
 191 }
 192
 193 static int exynos_drm_resume(struct device *dev)
 194 {
 195         struct drm_device *drm_dev = dev_get_drvdata(dev);
 196         struct exynos_drm_private *private;
 197
 198         if (pm_runtime_suspended(dev) || !drm_dev)
 199                 return 0;
 200
 201         private = drm_dev->dev_private;
 202         drm_atomic_helper_resume(drm_dev, private->suspend_state);
 203         exynos_drm_fbdev_resume(drm_dev);
 204         drm_kms_helper_poll_enable(drm_dev);
 205
 206         return 0;
 207 }
 208 #endif
 209
 210 static const struct dev_pm_ops exynos_drm_pm_ops = {
 211         SET_SYSTEM_SLEEP_PM_OPS(exynos_drm_suspend, exynos_drm_resume)
 212 };
 213
 214 /* forward declaration */
 215 static struct platform_driver exynos_drm_platform_driver;
 216
 217 struct exynos_drm_driver_info {
 218         struct platform_driver *driver;
 219         unsigned int flags;
 220 };
 221
 222 #define DRM_COMPONENT_DRIVER    BIT(0)  /* supports component framework */
 223 #define DRM_VIRTUAL_DEVICE      BIT(1)  /* create virtual platform device */
 224 #define DRM_DMA_DEVICE          BIT(2)  /* can be used for dma allocations */
 225
 226 #define DRV_PTR(drv, cond) (IS_ENABLED(cond) ? &drv : NULL)
 227
 228 /*
 229  * Connector drivers should not be placed before associated crtc drivers,
 230  * because connector requires pipe number of its crtc during initialization.
 231  */
 232 static struct exynos_drm_driver_info exynos_drm_drivers[] = {
 233         {
 234                 DRV_PTR(fimd_driver, CONFIG_DRM_EXYNOS_FIMD),
 235                 DRM_COMPONENT_DRIVER | DRM_DMA_DEVICE
 236         }, {
 237                 DRV_PTR(exynos5433_decon_driver, CONFIG_DRM_EXYNOS5433_DECON),
 238                 DRM_COMPONENT_DRIVER | DRM_DMA_DEVICE
 239         }, {
 240                 DRV_PTR(decon_driver, CONFIG_DRM_EXYNOS7_DECON),
 241                 DRM_COMPONENT_DRIVER | DRM_DMA_DEVICE
 242         }, {
 243                 DRV_PTR(mixer_driver, CONFIG_DRM_EXYNOS_MIXER),
 244                 DRM_COMPONENT_DRIVER | DRM_DMA_DEVICE
 245         }, {
 246                 DRV_PTR(mic_driver, CONFIG_DRM_EXYNOS_MIC),
 247                 DRM_COMPONENT_DRIVER
 248         }, {
 249                 DRV_PTR(dp_driver, CONFIG_DRM_EXYNOS_DP),
 250                 DRM_COMPONENT_DRIVER
 251         }, {
 252                 DRV_PTR(dsi_driver, CONFIG_DRM_EXYNOS_DSI),
 253                 DRM_COMPONENT_DRIVER
 254         }, {
 255                 DRV_PTR(hdmi_driver, CONFIG_DRM_EXYNOS_HDMI),
 256                 DRM_COMPONENT_DRIVER
 257         }, {
 258                 DRV_PTR(vidi_driver, CONFIG_DRM_EXYNOS_VIDI),
 259                 DRM_COMPONENT_DRIVER | DRM_VIRTUAL_DEVICE
 260         }, {
 261                 DRV_PTR(g2d_driver, CONFIG_DRM_EXYNOS_G2D),
 262         }, {
 263                 DRV_PTR(fimc_driver, CONFIG_DRM_EXYNOS_FIMC),
 264         }, {
 265                 DRV_PTR(rotator_driver, CONFIG_DRM_EXYNOS_ROTATOR),
 266                 DRM_COMPONENT_DRIVER
 267         }, {
 268                 DRV_PTR(gsc_driver, CONFIG_DRM_EXYNOS_GSC),
 269         }, {
 270                 &exynos_drm_platform_driver,
 271                 DRM_VIRTUAL_DEVICE
 272         }
 273 };
 274
 275 static int compare_dev(struct device *dev, void *data)
 276 {
 277         return dev == (struct device *)data;
 278 }
 279
 280 static struct component_match *exynos_drm_match_add(struct device *dev)
 281 {
 282         struct component_match *match = NULL;
 283         int i;
 284
 285         for (i = 0; i < ARRAY_SIZE(exynos_drm_drivers); ++i) {
 286                 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i];
 287                 struct device *p = NULL, *d;
 288
 289                 if (!info->driver || !(info->flags & DRM_COMPONENT_DRIVER))
 290                         continue;
 291
 292                 while ((d = bus_find_device(&platform_bus_type, p,
 293                                             &info->driver->driver,
 294                                             (void *)platform_bus_type.match))) {
 295                         put_device(p);
 296                         component_match_add(dev, &match, compare_dev, d);
 297                         p = d;
 298                 }
 299                 put_device(p);
 300         }
 301
 302         return match ?: ERR_PTR(-ENODEV);
 303 }
 304
 305 static struct device *exynos_drm_get_dma_device(void)
 306 {
 307         int i;
 308
 309         for (i = 0; i < ARRAY_SIZE(exynos_drm_drivers); ++i) {
 310                 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i];
 311                 struct device *dev;
 312
 313                 if (!info->driver || !(info->flags & DRM_DMA_DEVICE))
 314                         continue;
 315
 316                 while ((dev = bus_find_device(&platform_bus_type, NULL,
 317                                             &info->driver->driver,
 318                                             (void *)platform_bus_type.match))) {
 319                         put_device(dev);
 320                         return dev;
 321                 }
 322         }
 323         return NULL;
 324 }
 325
 326 static int exynos_drm_bind(struct device *dev)
 327 {
 328         struct exynos_drm_private *private;
 329         struct drm_encoder *encoder;
 330         struct drm_device *drm;
 331         unsigned int clone_mask;
 332         int cnt, ret;
 333
 334         drm = drm_dev_alloc(&exynos_drm_driver, dev);
 335         if (IS_ERR(drm))
 336                 return PTR_ERR(drm);
 337
 338         private = kzalloc(sizeof(struct exynos_drm_private), GFP_KERNEL);
 339         if (!private) {
 340                 ret = -ENOMEM;
 341                 goto err_free_drm;
 342         }
 343
 344         init_waitqueue_head(&private->wait);
 345         spin_lock_init(&private->lock);
 346
 347         dev_set_drvdata(dev, drm);
 348         drm->dev_private = (void *)private;
 349
 350         /* the first real CRTC device is used for all dma mapping operations */
 351         private->dma_dev = exynos_drm_get_dma_device();
 352         if (!private->dma_dev) {
 353                 DRM_ERROR("no device found for DMA mapping operations.\n");
 354                 ret = -ENODEV;
 355                 goto err_free_private;
 356         }
 357         DRM_INFO("Exynos DRM: using %s device for DMA mapping operations\n",
 358                  dev_name(private->dma_dev));
 359
 360         /* create common IOMMU mapping for all devices attached to Exynos DRM */
 361         ret = drm_create_iommu_mapping(drm);
 362         if (ret < 0) {
 363                 DRM_ERROR("failed to create iommu mapping.\n");
 364                 goto err_free_private;
 365         }
 366
 367         drm_mode_config_init(drm);
 368
 369         exynos_drm_mode_config_init(drm);
 370
 371         /* setup possible_clones. */
 372         cnt = 0;
 373         clone_mask = 0;
 374         list_for_each_entry(encoder, &drm->mode_config.encoder_list, head)
 375                 clone_mask |= (1 << (cnt++));
 376
 377         list_for_each_entry(encoder, &drm->mode_config.encoder_list, head)
 378                 encoder->possible_clones = clone_mask;
 379
 380         /* Try to bind all sub drivers. */
 381         ret = component_bind_all(drm->dev, drm);
 382         if (ret)
 383                 goto err_mode_config_cleanup;
 384
 385         ret = drm_vblank_init(drm, drm->mode_config.num_crtc);
 386         if (ret)
 387                 goto err_unbind_all;
 388
 389         /* Probe non kms sub drivers and virtual display driver. */
 390         ret = exynos_drm_device_subdrv_probe(drm);
 391         if (ret)
 392                 goto err_unbind_all;
 393
 394         drm_mode_config_reset(drm);
 395
 396         /*
 397          * enable drm irq mode.
 398          * - with irq_enabled = true, we can use the vblank feature.
 399          *
 400          * P.S. note that we wouldn't use drm irq handler but
 401          *      just specific driver own one instead because
 402          *      drm framework supports only one irq handler.
 403          */
 404         drm->irq_enabled = true;
 405
 406         /* init kms poll for handling hpd */
 407         drm_kms_helper_poll_init(drm);
 408
 409         ret = exynos_drm_fbdev_init(drm);
 410         if (ret)
 411                 goto err_cleanup_poll;
 412
 413         /* register the DRM device */
 414         ret = drm_dev_register(drm, 0);
 415         if (ret < 0)
 416                 goto err_cleanup_fbdev;
 417
 418         return 0;
 419
 420 err_cleanup_fbdev:
 421         exynos_drm_fbdev_fini(drm);
 422 err_cleanup_poll:
 423         drm_kms_helper_poll_fini(drm);
 424         exynos_drm_device_subdrv_remove(drm);
 425 err_unbind_all:
 426         component_unbind_all(drm->dev, drm);
 427 err_mode_config_cleanup:
 428         drm_mode_config_cleanup(drm);
 429         drm_release_iommu_mapping(drm);
 430 err_free_private:
 431         kfree(private);
 432 err_free_drm:
 433         drm_dev_unref(drm);
 434
 435         return ret;
 436 }
 437
 438 static void exynos_drm_unbind(struct device *dev)
 439 {
 440         struct drm_device *drm = dev_get_drvdata(dev);
 441
 442         drm_dev_unregister(drm);
 443
 444         exynos_drm_device_subdrv_remove(drm);
 445
 446         exynos_drm_fbdev_fini(drm);
 447         drm_kms_helper_poll_fini(drm);
 448
 449         component_unbind_all(drm->dev, drm);
 450         drm_mode_config_cleanup(drm);
 451         drm_release_iommu_mapping(drm);
 452
 453         kfree(drm->dev_private);
 454         drm->dev_private = NULL;
 455         dev_set_drvdata(dev, NULL);
 456
 457         drm_dev_unref(drm);
 458 }
 459
 460 static const struct component_master_ops exynos_drm_ops = {
 461         .bind           = exynos_drm_bind,
 462         .unbind         = exynos_drm_unbind,
 463 };
 464
 465 static int exynos_drm_platform_probe(struct platform_device *pdev)
 466 {
 467         struct component_match *match;
 468
 469         pdev->dev.coherent_dma_mask = DMA_BIT_MASK(32);
 470
 471         match = exynos_drm_match_add(&pdev->dev);
 472         if (IS_ERR(match))
 473                 return PTR_ERR(match);
 474
 475         return component_master_add_with_match(&pdev->dev, &exynos_drm_ops,
 476                                                match);
 477 }
 478
 479 static int exynos_drm_platform_remove(struct platform_device *pdev)
 480 {
 481         component_master_del(&pdev->dev, &exynos_drm_ops);
 482         return 0;
 483 }
 484
 485 static struct platform_driver exynos_drm_platform_driver = {
 486         .probe  = exynos_drm_platform_probe,
 487         .remove = exynos_drm_platform_remove,
 488         .driver = {
 489                 .name   = "exynos-drm",
 490                 .pm     = &exynos_drm_pm_ops,
 491         },
 492 };
 493
 494 static void exynos_drm_unregister_devices(void)
 495 {
 496         int i;
 497
 498         for (i = ARRAY_SIZE(exynos_drm_drivers) - 1; i >= 0; --i) {
 499                 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i];
 500                 struct device *dev;
 501
 502                 if (!info->driver || !(info->flags & DRM_VIRTUAL_DEVICE))
 503                         continue;
 504
 505                 while ((dev = bus_find_device(&platform_bus_type, NULL,
 506                                             &info->driver->driver,
 507                                             (void *)platform_bus_type.match))) {
 508                         put_device(dev);
 509                         platform_device_unregister(to_platform_device(dev));
 510                 }
 511         }
 512 }
 513
 514 static int exynos_drm_register_devices(void)
 515 {
 516         struct platform_device *pdev;
 517         int i;
 518
 519         for (i = 0; i < ARRAY_SIZE(exynos_drm_drivers); ++i) {
 520                 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i];
 521
 522                 if (!info->driver || !(info->flags & DRM_VIRTUAL_DEVICE))
 523                         continue;
 524
 525                 pdev = platform_device_register_simple(
 526                                         info->driver->driver.name, -1, NULL, 0);
 527                 if (IS_ERR(pdev))
 528                         goto fail;
 529         }
 530
 531         return 0;
 532 fail:
 533         exynos_drm_unregister_devices();
 534         return PTR_ERR(pdev);
 535 }
 536
 537 static void exynos_drm_unregister_drivers(void)
 538 {
 539         int i;
 540
 541         for (i = ARRAY_SIZE(exynos_drm_drivers) - 1; i >= 0; --i) {
 542                 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i];
 543
 544                 if (!info->driver)
 545                         continue;
 546
 547                 platform_driver_unregister(info->driver);
 548         }
 549 }
 550
 551 static int exynos_drm_register_drivers(void)
 552 {
 553         int i, ret;
 554
 555         for (i = 0; i < ARRAY_SIZE(exynos_drm_drivers); ++i) {
 556                 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i];
 557
 558                 if (!info->driver)
 559                         continue;
 560
 561                 ret = platform_driver_register(info->driver);
 562                 if (ret)
 563                         goto fail;
 564         }
 565         return 0;
 566 fail:
 567         exynos_drm_unregister_drivers();
 568         return ret;
 569 }
 570
 571 static int exynos_drm_init(void)
 572 {
 573         int ret;
 574
 575         ret = exynos_drm_register_devices();
 576         if (ret)
 577                 return ret;
 578
 579         ret = exynos_drm_register_drivers();
 580         if (ret)
 581                 goto err_unregister_pdevs;
 582
 583         return 0;
 584
 585 err_unregister_pdevs:
 586         exynos_drm_unregister_devices();
 587
 588         return ret;
 589 }
 590
 591 static void exynos_drm_exit(void)
 592 {
 593         exynos_drm_unregister_drivers();
 594         exynos_drm_unregister_devices();
 595 }
 596
 597 module_init(exynos_drm_init);
 598 module_exit(exynos_drm_exit);
 599
 600 MODULE_AUTHOR("Inki Dae <inki.dae@samsung.com>");
 601 MODULE_AUTHOR("Joonyoung Shim <jy0922.shim@samsung.com>");
 602 MODULE_AUTHOR("Seung-Woo Kim <sw0312.kim@samsung.com>");
 603 MODULE_DESCRIPTION("Samsung SoC DRM Driver");
 604 MODULE_LICENSE("GPL");