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
  20 #include <linux/component.h>
  21
  22 #include <drm/exynos_drm.h>
  23
  24 #include "exynos_drm_drv.h"
  25 #include "exynos_drm_fbdev.h"
  26 #include "exynos_drm_fb.h"
  27 #include "exynos_drm_gem.h"
  28 #include "exynos_drm_plane.h"
  29 #include "exynos_drm_vidi.h"
  30 #include "exynos_drm_g2d.h"
  31 #include "exynos_drm_ipp.h"
  32 #include "exynos_drm_iommu.h"
  33
  34 #define DRIVER_NAME     "exynos"
  35 #define DRIVER_DESC     "Samsung SoC DRM"
  36 #define DRIVER_DATE     "20110530"
  37 #define DRIVER_MAJOR    1
  38 #define DRIVER_MINOR    0
  39
  40 static struct device *exynos_drm_get_dma_device(void);
  41
  42 int exynos_atomic_check(struct drm_device *dev,
  43                         struct drm_atomic_state *state)
  44 {
  45         int ret;
  46
  47         ret = drm_atomic_helper_check_modeset(dev, state);
  48         if (ret)
  49                 return ret;
  50
  51         ret = drm_atomic_normalize_zpos(dev, state);
  52         if (ret)
  53                 return ret;
  54
  55         ret = drm_atomic_helper_check_planes(dev, state);
  56         if (ret)
  57                 return ret;
  58
  59         return ret;
  60 }
  61
  62 static int exynos_drm_open(struct drm_device *dev, struct drm_file *file)
  63 {
  64         struct drm_exynos_file_private *file_priv;
  65         int ret;
  66
  67         file_priv = kzalloc(sizeof(*file_priv), GFP_KERNEL);
  68         if (!file_priv)
  69                 return -ENOMEM;
  70
  71         file->driver_priv = file_priv;
  72
  73         ret = exynos_drm_subdrv_open(dev, file);
  74         if (ret)
  75                 goto err_file_priv_free;
  76
  77         return ret;
  78
  79 err_file_priv_free:
  80         kfree(file_priv);
  81         file->driver_priv = NULL;
  82         return ret;
  83 }
  84
  85 static void exynos_drm_postclose(struct drm_device *dev, struct drm_file *file)
  86 {
  87         exynos_drm_subdrv_close(dev, file);
  88         kfree(file->driver_priv);
  89         file->driver_priv = NULL;
  90 }
  91
  92 static void exynos_drm_lastclose(struct drm_device *dev)
  93 {
  94         exynos_drm_fbdev_restore_mode(dev);
  95 }
  96
  97 static const struct vm_operations_struct exynos_drm_gem_vm_ops = {
  98         .fault = exynos_drm_gem_fault,
  99         .open = drm_gem_vm_open,
 100         .close = drm_gem_vm_close,
 101 };
 102
 103 static const struct drm_ioctl_desc exynos_ioctls[] = {
 104         DRM_IOCTL_DEF_DRV(EXYNOS_GEM_CREATE, exynos_drm_gem_create_ioctl,
 105                         DRM_AUTH | DRM_RENDER_ALLOW),
 106         DRM_IOCTL_DEF_DRV(EXYNOS_GEM_MAP, exynos_drm_gem_map_ioctl,
 107                         DRM_AUTH | DRM_RENDER_ALLOW),
 108         DRM_IOCTL_DEF_DRV(EXYNOS_GEM_GET, exynos_drm_gem_get_ioctl,
 109                         DRM_RENDER_ALLOW),
 110         DRM_IOCTL_DEF_DRV(EXYNOS_VIDI_CONNECTION, vidi_connection_ioctl,
 111                         DRM_AUTH),
 112         DRM_IOCTL_DEF_DRV(EXYNOS_G2D_GET_VER, exynos_g2d_get_ver_ioctl,
 113                         DRM_AUTH | DRM_RENDER_ALLOW),
 114         DRM_IOCTL_DEF_DRV(EXYNOS_G2D_SET_CMDLIST, exynos_g2d_set_cmdlist_ioctl,
 115                         DRM_AUTH | DRM_RENDER_ALLOW),
 116         DRM_IOCTL_DEF_DRV(EXYNOS_G2D_EXEC, exynos_g2d_exec_ioctl,
 117                         DRM_AUTH | DRM_RENDER_ALLOW),
 118         DRM_IOCTL_DEF_DRV(EXYNOS_IPP_GET_PROPERTY, exynos_drm_ipp_get_property,
 119                         DRM_AUTH | DRM_RENDER_ALLOW),
 120         DRM_IOCTL_DEF_DRV(EXYNOS_IPP_SET_PROPERTY, exynos_drm_ipp_set_property,
 121                         DRM_AUTH | DRM_RENDER_ALLOW),
 122         DRM_IOCTL_DEF_DRV(EXYNOS_IPP_QUEUE_BUF, exynos_drm_ipp_queue_buf,
 123                         DRM_AUTH | DRM_RENDER_ALLOW),
 124         DRM_IOCTL_DEF_DRV(EXYNOS_IPP_CMD_CTRL, exynos_drm_ipp_cmd_ctrl,
 125                         DRM_AUTH | DRM_RENDER_ALLOW),
 126 };
 127
 128 static const struct file_operations exynos_drm_driver_fops = {
 129         .owner          = THIS_MODULE,
 130         .open           = drm_open,
 131         .mmap           = exynos_drm_gem_mmap,
 132         .poll           = drm_poll,
 133         .read           = drm_read,
 134         .unlocked_ioctl = drm_ioctl,
 135         .compat_ioctl = drm_compat_ioctl,
 136         .release        = drm_release,
 137 };
 138
 139 static struct drm_driver exynos_drm_driver = {
 140         .driver_features        = DRIVER_MODESET | DRIVER_GEM | DRIVER_PRIME
 141                                   | DRIVER_ATOMIC | DRIVER_RENDER,
 142         .open                   = exynos_drm_open,
 143         .lastclose              = exynos_drm_lastclose,
 144         .postclose              = exynos_drm_postclose,
 145         .gem_free_object_unlocked = exynos_drm_gem_free_object,
 146         .gem_vm_ops             = &exynos_drm_gem_vm_ops,
 147         .dumb_create            = exynos_drm_gem_dumb_create,
 148         .prime_handle_to_fd     = drm_gem_prime_handle_to_fd,
 149         .prime_fd_to_handle     = drm_gem_prime_fd_to_handle,
 150         .gem_prime_export       = drm_gem_prime_export,
 151         .gem_prime_import       = drm_gem_prime_import,
 152         .gem_prime_get_sg_table = exynos_drm_gem_prime_get_sg_table,
 153         .gem_prime_import_sg_table      = exynos_drm_gem_prime_import_sg_table,
 154         .gem_prime_vmap         = exynos_drm_gem_prime_vmap,
 155         .gem_prime_vunmap       = exynos_drm_gem_prime_vunmap,
 156         .gem_prime_mmap         = exynos_drm_gem_prime_mmap,
 157         .ioctls                 = exynos_ioctls,
 158         .num_ioctls             = ARRAY_SIZE(exynos_ioctls),
 159         .fops                   = &exynos_drm_driver_fops,
 160         .name   = DRIVER_NAME,
 161         .desc   = DRIVER_DESC,
 162         .date   = DRIVER_DATE,
 163         .major  = DRIVER_MAJOR,
 164         .minor  = DRIVER_MINOR,
 165 };
 166
 167 #ifdef CONFIG_PM_SLEEP
 168 static int exynos_drm_suspend(struct device *dev)
 169 {
 170         struct drm_device *drm_dev = dev_get_drvdata(dev);
 171         struct exynos_drm_private *private = drm_dev->dev_private;
 172
 173         if (pm_runtime_suspended(dev) || !drm_dev)
 174                 return 0;
 175
 176         drm_kms_helper_poll_disable(drm_dev);
 177         exynos_drm_fbdev_suspend(drm_dev);
 178         private->suspend_state = drm_atomic_helper_suspend(drm_dev);
 179         if (IS_ERR(private->suspend_state)) {
 180                 exynos_drm_fbdev_resume(drm_dev);
 181                 drm_kms_helper_poll_enable(drm_dev);
 182                 return PTR_ERR(private->suspend_state);
 183         }
 184
 185         return 0;
 186 }
 187
 188 static int exynos_drm_resume(struct device *dev)
 189 {
 190         struct drm_device *drm_dev = dev_get_drvdata(dev);
 191         struct exynos_drm_private *private = drm_dev->dev_private;
 192
 193         if (pm_runtime_suspended(dev) || !drm_dev)
 194                 return 0;
 195
 196         drm_atomic_helper_resume(drm_dev, private->suspend_state);
 197         exynos_drm_fbdev_resume(drm_dev);
 198         drm_kms_helper_poll_enable(drm_dev);
 199
 200         return 0;
 201 }
 202 #endif
 203
 204 static const struct dev_pm_ops exynos_drm_pm_ops = {
 205         SET_SYSTEM_SLEEP_PM_OPS(exynos_drm_suspend, exynos_drm_resume)
 206 };
 207
 208 /* forward declaration */
 209 static struct platform_driver exynos_drm_platform_driver;
 210
 211 struct exynos_drm_driver_info {
 212         struct platform_driver *driver;
 213         unsigned int flags;
 214 };
 215
 216 #define DRM_COMPONENT_DRIVER    BIT(0)  /* supports component framework */
 217 #define DRM_VIRTUAL_DEVICE      BIT(1)  /* create virtual platform device */
 218 #define DRM_DMA_DEVICE          BIT(2)  /* can be used for dma allocations */
 219
 220 #define DRV_PTR(drv, cond) (IS_ENABLED(cond) ? &drv : NULL)
 221
 222 /*
 223  * Connector drivers should not be placed before associated crtc drivers,
 224  * because connector requires pipe number of its crtc during initialization.
 225  */
 226 static struct exynos_drm_driver_info exynos_drm_drivers[] = {
 227         {
 228                 DRV_PTR(fimd_driver, CONFIG_DRM_EXYNOS_FIMD),
 229                 DRM_COMPONENT_DRIVER | DRM_DMA_DEVICE
 230         }, {
 231                 DRV_PTR(exynos5433_decon_driver, CONFIG_DRM_EXYNOS5433_DECON),
 232                 DRM_COMPONENT_DRIVER | DRM_DMA_DEVICE
 233         }, {
 234                 DRV_PTR(decon_driver, CONFIG_DRM_EXYNOS7_DECON),
 235                 DRM_COMPONENT_DRIVER | DRM_DMA_DEVICE
 236         }, {
 237                 DRV_PTR(mixer_driver, CONFIG_DRM_EXYNOS_MIXER),
 238                 DRM_COMPONENT_DRIVER | DRM_DMA_DEVICE
 239         }, {
 240                 DRV_PTR(mic_driver, CONFIG_DRM_EXYNOS_MIC),
 241                 DRM_COMPONENT_DRIVER
 242         }, {
 243                 DRV_PTR(dp_driver, CONFIG_DRM_EXYNOS_DP),
 244                 DRM_COMPONENT_DRIVER
 245         }, {
 246                 DRV_PTR(dsi_driver, CONFIG_DRM_EXYNOS_DSI),
 247                 DRM_COMPONENT_DRIVER
 248         }, {
 249                 DRV_PTR(hdmi_driver, CONFIG_DRM_EXYNOS_HDMI),
 250                 DRM_COMPONENT_DRIVER
 251         }, {
 252                 DRV_PTR(vidi_driver, CONFIG_DRM_EXYNOS_VIDI),
 253                 DRM_COMPONENT_DRIVER | DRM_VIRTUAL_DEVICE
 254         }, {
 255                 DRV_PTR(g2d_driver, CONFIG_DRM_EXYNOS_G2D),
 256         }, {
 257                 DRV_PTR(fimc_driver, CONFIG_DRM_EXYNOS_FIMC),
 258         }, {
 259                 DRV_PTR(rotator_driver, CONFIG_DRM_EXYNOS_ROTATOR),
 260         }, {
 261                 DRV_PTR(gsc_driver, CONFIG_DRM_EXYNOS_GSC),
 262         }, {
 263                 DRV_PTR(ipp_driver, CONFIG_DRM_EXYNOS_IPP),
 264                 DRM_VIRTUAL_DEVICE
 265         }, {
 266                 &exynos_drm_platform_driver,
 267                 DRM_VIRTUAL_DEVICE
 268         }
 269 };
 270
 271 static int compare_dev(struct device *dev, void *data)
 272 {
 273         return dev == (struct device *)data;
 274 }
 275
 276 static struct component_match *exynos_drm_match_add(struct device *dev)
 277 {
 278         struct component_match *match = NULL;
 279         int i;
 280
 281         for (i = 0; i < ARRAY_SIZE(exynos_drm_drivers); ++i) {
 282                 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i];
 283                 struct device *p = NULL, *d;
 284
 285                 if (!info->driver || !(info->flags & DRM_COMPONENT_DRIVER))
 286                         continue;
 287
 288                 while ((d = bus_find_device(&platform_bus_type, p,
 289                                             &info->driver->driver,
 290                                             (void *)platform_bus_type.match))) {
 291                         put_device(p);
 292                         component_match_add(dev, &match, compare_dev, d);
 293                         p = d;
 294                 }
 295                 put_device(p);
 296         }
 297
 298         return match ?: ERR_PTR(-ENODEV);
 299 }
 300
 301 static int exynos_drm_bind(struct device *dev)
 302 {
 303         struct exynos_drm_private *private;
 304         struct drm_encoder *encoder;
 305         struct drm_device *drm;
 306         unsigned int clone_mask;
 307         int cnt, ret;
 308
 309         drm = drm_dev_alloc(&exynos_drm_driver, dev);
 310         if (IS_ERR(drm))
 311                 return PTR_ERR(drm);
 312
 313         private = kzalloc(sizeof(struct exynos_drm_private), GFP_KERNEL);
 314         if (!private) {
 315                 ret = -ENOMEM;
 316                 goto err_free_drm;
 317         }
 318
 319         init_waitqueue_head(&private->wait);
 320         spin_lock_init(&private->lock);
 321
 322         dev_set_drvdata(dev, drm);
 323         drm->dev_private = (void *)private;
 324
 325         /* the first real CRTC device is used for all dma mapping operations */
 326         private->dma_dev = exynos_drm_get_dma_device();
 327         if (!private->dma_dev) {
 328                 DRM_ERROR("no device found for DMA mapping operations.\n");
 329                 ret = -ENODEV;
 330                 goto err_free_private;
 331         }
 332         DRM_INFO("Exynos DRM: using %s device for DMA mapping operations\n",
 333                  dev_name(private->dma_dev));
 334
 335         /* create common IOMMU mapping for all devices attached to Exynos DRM */
 336         ret = drm_create_iommu_mapping(drm);
 337         if (ret < 0) {
 338                 DRM_ERROR("failed to create iommu mapping.\n");
 339                 goto err_free_private;
 340         }
 341
 342         drm_mode_config_init(drm);
 343
 344         exynos_drm_mode_config_init(drm);
 345
 346         /* setup possible_clones. */
 347         cnt = 0;
 348         clone_mask = 0;
 349         list_for_each_entry(encoder, &drm->mode_config.encoder_list, head)
 350                 clone_mask |= (1 << (cnt++));
 351
 352         list_for_each_entry(encoder, &drm->mode_config.encoder_list, head)
 353                 encoder->possible_clones = clone_mask;
 354
 355         /* Try to bind all sub drivers. */
 356         ret = component_bind_all(drm->dev, drm);
 357         if (ret)
 358                 goto err_mode_config_cleanup;
 359
 360         ret = drm_vblank_init(drm, drm->mode_config.num_crtc);
 361         if (ret)
 362                 goto err_unbind_all;
 363
 364         /* Probe non kms sub drivers and virtual display driver. */
 365         ret = exynos_drm_device_subdrv_probe(drm);
 366         if (ret)
 367                 goto err_unbind_all;
 368
 369         drm_mode_config_reset(drm);
 370
 371         /*
 372          * enable drm irq mode.
 373          * - with irq_enabled = true, we can use the vblank feature.
 374          *
 375          * P.S. note that we wouldn't use drm irq handler but
 376          *      just specific driver own one instead because
 377          *      drm framework supports only one irq handler.
 378          */
 379         drm->irq_enabled = true;
 380
 381         /* init kms poll for handling hpd */
 382         drm_kms_helper_poll_init(drm);
 383
 384         ret = exynos_drm_fbdev_init(drm);
 385         if (ret)
 386                 goto err_cleanup_poll;
 387
 388         /* register the DRM device */
 389         ret = drm_dev_register(drm, 0);
 390         if (ret < 0)
 391                 goto err_cleanup_fbdev;
 392
 393         return 0;
 394
 395 err_cleanup_fbdev:
 396         exynos_drm_fbdev_fini(drm);
 397 err_cleanup_poll:
 398         drm_kms_helper_poll_fini(drm);
 399         exynos_drm_device_subdrv_remove(drm);
 400 err_unbind_all:
 401         component_unbind_all(drm->dev, drm);
 402 err_mode_config_cleanup:
 403         drm_mode_config_cleanup(drm);
 404         drm_release_iommu_mapping(drm);
 405 err_free_private:
 406         kfree(private);
 407 err_free_drm:
 408         drm_dev_unref(drm);
 409
 410         return ret;
 411 }
 412
 413 static void exynos_drm_unbind(struct device *dev)
 414 {
 415         struct drm_device *drm = dev_get_drvdata(dev);
 416
 417         drm_dev_unregister(drm);
 418
 419         exynos_drm_device_subdrv_remove(drm);
 420
 421         exynos_drm_fbdev_fini(drm);
 422         drm_kms_helper_poll_fini(drm);
 423
 424         component_unbind_all(drm->dev, drm);
 425         drm_mode_config_cleanup(drm);
 426         drm_release_iommu_mapping(drm);
 427
 428         kfree(drm->dev_private);
 429         drm->dev_private = NULL;
 430
 431         drm_dev_unref(drm);
 432 }
 433
 434 static const struct component_master_ops exynos_drm_ops = {
 435         .bind           = exynos_drm_bind,
 436         .unbind         = exynos_drm_unbind,
 437 };
 438
 439 static int exynos_drm_platform_probe(struct platform_device *pdev)
 440 {
 441         struct component_match *match;
 442
 443         pdev->dev.coherent_dma_mask = DMA_BIT_MASK(32);
 444
 445         match = exynos_drm_match_add(&pdev->dev);
 446         if (IS_ERR(match))
 447                 return PTR_ERR(match);
 448
 449         return component_master_add_with_match(&pdev->dev, &exynos_drm_ops,
 450                                                match);
 451 }
 452
 453 static int exynos_drm_platform_remove(struct platform_device *pdev)
 454 {
 455         component_master_del(&pdev->dev, &exynos_drm_ops);
 456         return 0;
 457 }
 458
 459 static struct platform_driver exynos_drm_platform_driver = {
 460         .probe  = exynos_drm_platform_probe,
 461         .remove = exynos_drm_platform_remove,
 462         .driver = {
 463                 .name   = "exynos-drm",
 464                 .pm     = &exynos_drm_pm_ops,
 465         },
 466 };
 467
 468 static struct device *exynos_drm_get_dma_device(void)
 469 {
 470         int i;
 471
 472         for (i = 0; i < ARRAY_SIZE(exynos_drm_drivers); ++i) {
 473                 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i];
 474                 struct device *dev;
 475
 476                 if (!info->driver || !(info->flags & DRM_DMA_DEVICE))
 477                         continue;
 478
 479                 while ((dev = bus_find_device(&platform_bus_type, NULL,
 480                                             &info->driver->driver,
 481                                             (void *)platform_bus_type.match))) {
 482                         put_device(dev);
 483                         return dev;
 484                 }
 485         }
 486         return NULL;
 487 }
 488
 489 static void exynos_drm_unregister_devices(void)
 490 {
 491         int i;
 492
 493         for (i = ARRAY_SIZE(exynos_drm_drivers) - 1; i >= 0; --i) {
 494                 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i];
 495                 struct device *dev;
 496
 497                 if (!info->driver || !(info->flags & DRM_VIRTUAL_DEVICE))
 498                         continue;
 499
 500                 while ((dev = bus_find_device(&platform_bus_type, NULL,
 501                                             &info->driver->driver,
 502                                             (void *)platform_bus_type.match))) {
 503                         put_device(dev);
 504                         platform_device_unregister(to_platform_device(dev));
 505                 }
 506         }
 507 }
 508
 509 static int exynos_drm_register_devices(void)
 510 {
 511         struct platform_device *pdev;
 512         int i;
 513
 514         for (i = 0; i < ARRAY_SIZE(exynos_drm_drivers); ++i) {
 515                 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i];
 516
 517                 if (!info->driver || !(info->flags & DRM_VIRTUAL_DEVICE))
 518                         continue;
 519
 520                 pdev = platform_device_register_simple(
 521                                         info->driver->driver.name, -1, NULL, 0);
 522                 if (IS_ERR(pdev))
 523                         goto fail;
 524         }
 525
 526         return 0;
 527 fail:
 528         exynos_drm_unregister_devices();
 529         return PTR_ERR(pdev);
 530 }
 531
 532 static void exynos_drm_unregister_drivers(void)
 533 {
 534         int i;
 535
 536         for (i = ARRAY_SIZE(exynos_drm_drivers) - 1; i >= 0; --i) {
 537                 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i];
 538
 539                 if (!info->driver)
 540                         continue;
 541
 542                 platform_driver_unregister(info->driver);
 543         }
 544 }
 545
 546 static int exynos_drm_register_drivers(void)
 547 {
 548         int i, ret;
 549
 550         for (i = 0; i < ARRAY_SIZE(exynos_drm_drivers); ++i) {
 551                 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i];
 552
 553                 if (!info->driver)
 554                         continue;
 555
 556                 ret = platform_driver_register(info->driver);
 557                 if (ret)
 558                         goto fail;
 559         }
 560         return 0;
 561 fail:
 562         exynos_drm_unregister_drivers();
 563         return ret;
 564 }
 565
 566 static int exynos_drm_init(void)
 567 {
 568         int ret;
 569
 570         ret = exynos_drm_register_devices();
 571         if (ret)
 572                 return ret;
 573
 574         ret = exynos_drm_register_drivers();
 575         if (ret)
 576                 goto err_unregister_pdevs;
 577
 578         return 0;
 579
 580 err_unregister_pdevs:
 581         exynos_drm_unregister_devices();
 582
 583         return ret;
 584 }
 585
 586 static void exynos_drm_exit(void)
 587 {
 588         exynos_drm_unregister_drivers();
 589         exynos_drm_unregister_devices();
 590 }
 591
 592 module_init(exynos_drm_init);
 593 module_exit(exynos_drm_exit);
 594
 595 MODULE_AUTHOR("Inki Dae <inki.dae@samsung.com>");
 596 MODULE_AUTHOR("Joonyoung Shim <jy0922.shim@samsung.com>");
 597 MODULE_AUTHOR("Seung-Woo Kim <sw0312.kim@samsung.com>");
 598 MODULE_DESCRIPTION("Samsung SoC DRM Driver");
 599 MODULE_LICENSE("GPL");