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         }, {
 267                 DRV_PTR(gsc_driver, CONFIG_DRM_EXYNOS_GSC),
 268         }, {
 269                 &exynos_drm_platform_driver,
 270                 DRM_VIRTUAL_DEVICE
 271         }
 272 };
 273
 274 static int compare_dev(struct device *dev, void *data)
 275 {
 276         return dev == (struct device *)data;
 277 }
 278
 279 static struct component_match *exynos_drm_match_add(struct device *dev)
 280 {
 281         struct component_match *match = NULL;
 282         int i;
 283
 284         for (i = 0; i < ARRAY_SIZE(exynos_drm_drivers); ++i) {
 285                 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i];
 286                 struct device *p = NULL, *d;
 287
 288                 if (!info->driver || !(info->flags & DRM_COMPONENT_DRIVER))
 289                         continue;
 290
 291                 while ((d = bus_find_device(&platform_bus_type, p,
 292                                             &info->driver->driver,
 293                                             (void *)platform_bus_type.match))) {
 294                         put_device(p);
 295                         component_match_add(dev, &match, compare_dev, d);
 296                         p = d;
 297                 }
 298                 put_device(p);
 299         }
 300
 301         return match ?: ERR_PTR(-ENODEV);
 302 }
 303
 304 static struct device *exynos_drm_get_dma_device(void)
 305 {
 306         int i;
 307
 308         for (i = 0; i < ARRAY_SIZE(exynos_drm_drivers); ++i) {
 309                 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i];
 310                 struct device *dev;
 311
 312                 if (!info->driver || !(info->flags & DRM_DMA_DEVICE))
 313                         continue;
 314
 315                 while ((dev = bus_find_device(&platform_bus_type, NULL,
 316                                             &info->driver->driver,
 317                                             (void *)platform_bus_type.match))) {
 318                         put_device(dev);
 319                         return dev;
 320                 }
 321         }
 322         return NULL;
 323 }
 324
 325 static int exynos_drm_bind(struct device *dev)
 326 {
 327         struct exynos_drm_private *private;
 328         struct drm_encoder *encoder;
 329         struct drm_device *drm;
 330         unsigned int clone_mask;
 331         int cnt, ret;
 332
 333         drm = drm_dev_alloc(&exynos_drm_driver, dev);
 334         if (IS_ERR(drm))
 335                 return PTR_ERR(drm);
 336
 337         private = kzalloc(sizeof(struct exynos_drm_private), GFP_KERNEL);
 338         if (!private) {
 339                 ret = -ENOMEM;
 340                 goto err_free_drm;
 341         }
 342
 343         init_waitqueue_head(&private->wait);
 344         spin_lock_init(&private->lock);
 345
 346         dev_set_drvdata(dev, drm);
 347         drm->dev_private = (void *)private;
 348
 349         /* the first real CRTC device is used for all dma mapping operations */
 350         private->dma_dev = exynos_drm_get_dma_device();
 351         if (!private->dma_dev) {
 352                 DRM_ERROR("no device found for DMA mapping operations.\n");
 353                 ret = -ENODEV;
 354                 goto err_free_private;
 355         }
 356         DRM_INFO("Exynos DRM: using %s device for DMA mapping operations\n",
 357                  dev_name(private->dma_dev));
 358
 359         /* create common IOMMU mapping for all devices attached to Exynos DRM */
 360         ret = drm_create_iommu_mapping(drm);
 361         if (ret < 0) {
 362                 DRM_ERROR("failed to create iommu mapping.\n");
 363                 goto err_free_private;
 364         }
 365
 366         drm_mode_config_init(drm);
 367
 368         exynos_drm_mode_config_init(drm);
 369
 370         /* setup possible_clones. */
 371         cnt = 0;
 372         clone_mask = 0;
 373         list_for_each_entry(encoder, &drm->mode_config.encoder_list, head)
 374                 clone_mask |= (1 << (cnt++));
 375
 376         list_for_each_entry(encoder, &drm->mode_config.encoder_list, head)
 377                 encoder->possible_clones = clone_mask;
 378
 379         /* Try to bind all sub drivers. */
 380         ret = component_bind_all(drm->dev, drm);
 381         if (ret)
 382                 goto err_mode_config_cleanup;
 383
 384         ret = drm_vblank_init(drm, drm->mode_config.num_crtc);
 385         if (ret)
 386                 goto err_unbind_all;
 387
 388         /* Probe non kms sub drivers and virtual display driver. */
 389         ret = exynos_drm_device_subdrv_probe(drm);
 390         if (ret)
 391                 goto err_unbind_all;
 392
 393         drm_mode_config_reset(drm);
 394
 395         /*
 396          * enable drm irq mode.
 397          * - with irq_enabled = true, we can use the vblank feature.
 398          *
 399          * P.S. note that we wouldn't use drm irq handler but
 400          *      just specific driver own one instead because
 401          *      drm framework supports only one irq handler.
 402          */
 403         drm->irq_enabled = true;
 404
 405         /* init kms poll for handling hpd */
 406         drm_kms_helper_poll_init(drm);
 407
 408         ret = exynos_drm_fbdev_init(drm);
 409         if (ret)
 410                 goto err_cleanup_poll;
 411
 412         /* register the DRM device */
 413         ret = drm_dev_register(drm, 0);
 414         if (ret < 0)
 415                 goto err_cleanup_fbdev;
 416
 417         return 0;
 418
 419 err_cleanup_fbdev:
 420         exynos_drm_fbdev_fini(drm);
 421 err_cleanup_poll:
 422         drm_kms_helper_poll_fini(drm);
 423         exynos_drm_device_subdrv_remove(drm);
 424 err_unbind_all:
 425         component_unbind_all(drm->dev, drm);
 426 err_mode_config_cleanup:
 427         drm_mode_config_cleanup(drm);
 428         drm_release_iommu_mapping(drm);
 429 err_free_private:
 430         kfree(private);
 431 err_free_drm:
 432         drm_dev_unref(drm);
 433
 434         return ret;
 435 }
 436
 437 static void exynos_drm_unbind(struct device *dev)
 438 {
 439         struct drm_device *drm = dev_get_drvdata(dev);
 440
 441         drm_dev_unregister(drm);
 442
 443         exynos_drm_device_subdrv_remove(drm);
 444
 445         exynos_drm_fbdev_fini(drm);
 446         drm_kms_helper_poll_fini(drm);
 447
 448         component_unbind_all(drm->dev, drm);
 449         drm_mode_config_cleanup(drm);
 450         drm_release_iommu_mapping(drm);
 451
 452         kfree(drm->dev_private);
 453         drm->dev_private = NULL;
 454         dev_set_drvdata(dev, NULL);
 455
 456         drm_dev_unref(drm);
 457 }
 458
 459 static const struct component_master_ops exynos_drm_ops = {
 460         .bind           = exynos_drm_bind,
 461         .unbind         = exynos_drm_unbind,
 462 };
 463
 464 static int exynos_drm_platform_probe(struct platform_device *pdev)
 465 {
 466         struct component_match *match;
 467
 468         pdev->dev.coherent_dma_mask = DMA_BIT_MASK(32);
 469
 470         match = exynos_drm_match_add(&pdev->dev);
 471         if (IS_ERR(match))
 472                 return PTR_ERR(match);
 473
 474         return component_master_add_with_match(&pdev->dev, &exynos_drm_ops,
 475                                                match);
 476 }
 477
 478 static int exynos_drm_platform_remove(struct platform_device *pdev)
 479 {
 480         component_master_del(&pdev->dev, &exynos_drm_ops);
 481         return 0;
 482 }
 483
 484 static struct platform_driver exynos_drm_platform_driver = {
 485         .probe  = exynos_drm_platform_probe,
 486         .remove = exynos_drm_platform_remove,
 487         .driver = {
 488                 .name   = "exynos-drm",
 489                 .pm     = &exynos_drm_pm_ops,
 490         },
 491 };
 492
 493 static void exynos_drm_unregister_devices(void)
 494 {
 495         int i;
 496
 497         for (i = ARRAY_SIZE(exynos_drm_drivers) - 1; i >= 0; --i) {
 498                 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i];
 499                 struct device *dev;
 500
 501                 if (!info->driver || !(info->flags & DRM_VIRTUAL_DEVICE))
 502                         continue;
 503
 504                 while ((dev = bus_find_device(&platform_bus_type, NULL,
 505                                             &info->driver->driver,
 506                                             (void *)platform_bus_type.match))) {
 507                         put_device(dev);
 508                         platform_device_unregister(to_platform_device(dev));
 509                 }
 510         }
 511 }
 512
 513 static int exynos_drm_register_devices(void)
 514 {
 515         struct platform_device *pdev;
 516         int i;
 517
 518         for (i = 0; i < ARRAY_SIZE(exynos_drm_drivers); ++i) {
 519                 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i];
 520
 521                 if (!info->driver || !(info->flags & DRM_VIRTUAL_DEVICE))
 522                         continue;
 523
 524                 pdev = platform_device_register_simple(
 525                                         info->driver->driver.name, -1, NULL, 0);
 526                 if (IS_ERR(pdev))
 527                         goto fail;
 528         }
 529
 530         return 0;
 531 fail:
 532         exynos_drm_unregister_devices();
 533         return PTR_ERR(pdev);
 534 }
 535
 536 static void exynos_drm_unregister_drivers(void)
 537 {
 538         int i;
 539
 540         for (i = ARRAY_SIZE(exynos_drm_drivers) - 1; i >= 0; --i) {
 541                 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i];
 542
 543                 if (!info->driver)
 544                         continue;
 545
 546                 platform_driver_unregister(info->driver);
 547         }
 548 }
 549
 550 static int exynos_drm_register_drivers(void)
 551 {
 552         int i, ret;
 553
 554         for (i = 0; i < ARRAY_SIZE(exynos_drm_drivers); ++i) {
 555                 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i];
 556
 557                 if (!info->driver)
 558                         continue;
 559
 560                 ret = platform_driver_register(info->driver);
 561                 if (ret)
 562                         goto fail;
 563         }
 564         return 0;
 565 fail:
 566         exynos_drm_unregister_drivers();
 567         return ret;
 568 }
 569
 570 static int exynos_drm_init(void)
 571 {
 572         int ret;
 573
 574         ret = exynos_drm_register_devices();
 575         if (ret)
 576                 return ret;
 577
 578         ret = exynos_drm_register_drivers();
 579         if (ret)
 580                 goto err_unregister_pdevs;
 581
 582         return 0;
 583
 584 err_unregister_pdevs:
 585         exynos_drm_unregister_devices();
 586
 587         return ret;
 588 }
 589
 590 static void exynos_drm_exit(void)
 591 {
 592         exynos_drm_unregister_drivers();
 593         exynos_drm_unregister_devices();
 594 }
 595
 596 module_init(exynos_drm_init);
 597 module_exit(exynos_drm_exit);
 598
 599 MODULE_AUTHOR("Inki Dae <inki.dae@samsung.com>");
 600 MODULE_AUTHOR("Joonyoung Shim <jy0922.shim@samsung.com>");
 601 MODULE_AUTHOR("Seung-Woo Kim <sw0312.kim@samsung.com>");
 602 MODULE_DESCRIPTION("Samsung SoC DRM Driver");
 603 MODULE_LICENSE("GPL");