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;
 172
 173         if (pm_runtime_suspended(dev) || !drm_dev)
 174                 return 0;
 175
 176         private = drm_dev->dev_private;
 177
 178         drm_kms_helper_poll_disable(drm_dev);
 179         exynos_drm_fbdev_suspend(drm_dev);
 180         private->suspend_state = drm_atomic_helper_suspend(drm_dev);
 181         if (IS_ERR(private->suspend_state)) {
 182                 exynos_drm_fbdev_resume(drm_dev);
 183                 drm_kms_helper_poll_enable(drm_dev);
 184                 return PTR_ERR(private->suspend_state);
 185         }
 186
 187         return 0;
 188 }
 189
 190 static int exynos_drm_resume(struct device *dev)
 191 {
 192         struct drm_device *drm_dev = dev_get_drvdata(dev);
 193         struct exynos_drm_private *private;
 194
 195         if (pm_runtime_suspended(dev) || !drm_dev)
 196                 return 0;
 197
 198         private = drm_dev->dev_private;
 199         drm_atomic_helper_resume(drm_dev, private->suspend_state);
 200         exynos_drm_fbdev_resume(drm_dev);
 201         drm_kms_helper_poll_enable(drm_dev);
 202
 203         return 0;
 204 }
 205 #endif
 206
 207 static const struct dev_pm_ops exynos_drm_pm_ops = {
 208         SET_SYSTEM_SLEEP_PM_OPS(exynos_drm_suspend, exynos_drm_resume)
 209 };
 210
 211 /* forward declaration */
 212 static struct platform_driver exynos_drm_platform_driver;
 213
 214 struct exynos_drm_driver_info {
 215         struct platform_driver *driver;
 216         unsigned int flags;
 217 };
 218
 219 #define DRM_COMPONENT_DRIVER    BIT(0)  /* supports component framework */
 220 #define DRM_VIRTUAL_DEVICE      BIT(1)  /* create virtual platform device */
 221 #define DRM_DMA_DEVICE          BIT(2)  /* can be used for dma allocations */
 222
 223 #define DRV_PTR(drv, cond) (IS_ENABLED(cond) ? &drv : NULL)
 224
 225 /*
 226  * Connector drivers should not be placed before associated crtc drivers,
 227  * because connector requires pipe number of its crtc during initialization.
 228  */
 229 static struct exynos_drm_driver_info exynos_drm_drivers[] = {
 230         {
 231                 DRV_PTR(fimd_driver, CONFIG_DRM_EXYNOS_FIMD),
 232                 DRM_COMPONENT_DRIVER | DRM_DMA_DEVICE
 233         }, {
 234                 DRV_PTR(exynos5433_decon_driver, CONFIG_DRM_EXYNOS5433_DECON),
 235                 DRM_COMPONENT_DRIVER | DRM_DMA_DEVICE
 236         }, {
 237                 DRV_PTR(decon_driver, CONFIG_DRM_EXYNOS7_DECON),
 238                 DRM_COMPONENT_DRIVER | DRM_DMA_DEVICE
 239         }, {
 240                 DRV_PTR(mixer_driver, CONFIG_DRM_EXYNOS_MIXER),
 241                 DRM_COMPONENT_DRIVER | DRM_DMA_DEVICE
 242         }, {
 243                 DRV_PTR(mic_driver, CONFIG_DRM_EXYNOS_MIC),
 244                 DRM_COMPONENT_DRIVER
 245         }, {
 246                 DRV_PTR(dp_driver, CONFIG_DRM_EXYNOS_DP),
 247                 DRM_COMPONENT_DRIVER
 248         }, {
 249                 DRV_PTR(dsi_driver, CONFIG_DRM_EXYNOS_DSI),
 250                 DRM_COMPONENT_DRIVER
 251         }, {
 252                 DRV_PTR(hdmi_driver, CONFIG_DRM_EXYNOS_HDMI),
 253                 DRM_COMPONENT_DRIVER
 254         }, {
 255                 DRV_PTR(vidi_driver, CONFIG_DRM_EXYNOS_VIDI),
 256                 DRM_COMPONENT_DRIVER | DRM_VIRTUAL_DEVICE
 257         }, {
 258                 DRV_PTR(g2d_driver, CONFIG_DRM_EXYNOS_G2D),
 259         }, {
 260                 DRV_PTR(fimc_driver, CONFIG_DRM_EXYNOS_FIMC),
 261         }, {
 262                 DRV_PTR(rotator_driver, CONFIG_DRM_EXYNOS_ROTATOR),
 263         }, {
 264                 DRV_PTR(gsc_driver, CONFIG_DRM_EXYNOS_GSC),
 265         }, {
 266                 DRV_PTR(ipp_driver, CONFIG_DRM_EXYNOS_IPP),
 267                 DRM_VIRTUAL_DEVICE
 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 int exynos_drm_bind(struct device *dev)
 305 {
 306         struct exynos_drm_private *private;
 307         struct drm_encoder *encoder;
 308         struct drm_device *drm;
 309         unsigned int clone_mask;
 310         int cnt, ret;
 311
 312         drm = drm_dev_alloc(&exynos_drm_driver, dev);
 313         if (IS_ERR(drm))
 314                 return PTR_ERR(drm);
 315
 316         private = kzalloc(sizeof(struct exynos_drm_private), GFP_KERNEL);
 317         if (!private) {
 318                 ret = -ENOMEM;
 319                 goto err_free_drm;
 320         }
 321
 322         init_waitqueue_head(&private->wait);
 323         spin_lock_init(&private->lock);
 324
 325         dev_set_drvdata(dev, drm);
 326         drm->dev_private = (void *)private;
 327
 328         /* the first real CRTC device is used for all dma mapping operations */
 329         private->dma_dev = exynos_drm_get_dma_device();
 330         if (!private->dma_dev) {
 331                 DRM_ERROR("no device found for DMA mapping operations.\n");
 332                 ret = -ENODEV;
 333                 goto err_free_private;
 334         }
 335         DRM_INFO("Exynos DRM: using %s device for DMA mapping operations\n",
 336                  dev_name(private->dma_dev));
 337
 338         /* create common IOMMU mapping for all devices attached to Exynos DRM */
 339         ret = drm_create_iommu_mapping(drm);
 340         if (ret < 0) {
 341                 DRM_ERROR("failed to create iommu mapping.\n");
 342                 goto err_free_private;
 343         }
 344
 345         drm_mode_config_init(drm);
 346
 347         exynos_drm_mode_config_init(drm);
 348
 349         /* setup possible_clones. */
 350         cnt = 0;
 351         clone_mask = 0;
 352         list_for_each_entry(encoder, &drm->mode_config.encoder_list, head)
 353                 clone_mask |= (1 << (cnt++));
 354
 355         list_for_each_entry(encoder, &drm->mode_config.encoder_list, head)
 356                 encoder->possible_clones = clone_mask;
 357
 358         /* Try to bind all sub drivers. */
 359         ret = component_bind_all(drm->dev, drm);
 360         if (ret)
 361                 goto err_mode_config_cleanup;
 362
 363         ret = drm_vblank_init(drm, drm->mode_config.num_crtc);
 364         if (ret)
 365                 goto err_unbind_all;
 366
 367         /* Probe non kms sub drivers and virtual display driver. */
 368         ret = exynos_drm_device_subdrv_probe(drm);
 369         if (ret)
 370                 goto err_unbind_all;
 371
 372         drm_mode_config_reset(drm);
 373
 374         /*
 375          * enable drm irq mode.
 376          * - with irq_enabled = true, we can use the vblank feature.
 377          *
 378          * P.S. note that we wouldn't use drm irq handler but
 379          *      just specific driver own one instead because
 380          *      drm framework supports only one irq handler.
 381          */
 382         drm->irq_enabled = true;
 383
 384         /* init kms poll for handling hpd */
 385         drm_kms_helper_poll_init(drm);
 386
 387         ret = exynos_drm_fbdev_init(drm);
 388         if (ret)
 389                 goto err_cleanup_poll;
 390
 391         /* register the DRM device */
 392         ret = drm_dev_register(drm, 0);
 393         if (ret < 0)
 394                 goto err_cleanup_fbdev;
 395
 396         return 0;
 397
 398 err_cleanup_fbdev:
 399         exynos_drm_fbdev_fini(drm);
 400 err_cleanup_poll:
 401         drm_kms_helper_poll_fini(drm);
 402         exynos_drm_device_subdrv_remove(drm);
 403 err_unbind_all:
 404         component_unbind_all(drm->dev, drm);
 405 err_mode_config_cleanup:
 406         drm_mode_config_cleanup(drm);
 407         drm_release_iommu_mapping(drm);
 408 err_free_private:
 409         kfree(private);
 410 err_free_drm:
 411         drm_dev_unref(drm);
 412
 413         return ret;
 414 }
 415
 416 static void exynos_drm_unbind(struct device *dev)
 417 {
 418         struct drm_device *drm = dev_get_drvdata(dev);
 419
 420         drm_dev_unregister(drm);
 421
 422         exynos_drm_device_subdrv_remove(drm);
 423
 424         exynos_drm_fbdev_fini(drm);
 425         drm_kms_helper_poll_fini(drm);
 426
 427         component_unbind_all(drm->dev, drm);
 428         drm_mode_config_cleanup(drm);
 429         drm_release_iommu_mapping(drm);
 430
 431         kfree(drm->dev_private);
 432         drm->dev_private = NULL;
 433         dev_set_drvdata(dev, NULL);
 434
 435         drm_dev_unref(drm);
 436 }
 437
 438 static const struct component_master_ops exynos_drm_ops = {
 439         .bind           = exynos_drm_bind,
 440         .unbind         = exynos_drm_unbind,
 441 };
 442
 443 static int exynos_drm_platform_probe(struct platform_device *pdev)
 444 {
 445         struct component_match *match;
 446
 447         pdev->dev.coherent_dma_mask = DMA_BIT_MASK(32);
 448
 449         match = exynos_drm_match_add(&pdev->dev);
 450         if (IS_ERR(match))
 451                 return PTR_ERR(match);
 452
 453         return component_master_add_with_match(&pdev->dev, &exynos_drm_ops,
 454                                                match);
 455 }
 456
 457 static int exynos_drm_platform_remove(struct platform_device *pdev)
 458 {
 459         component_master_del(&pdev->dev, &exynos_drm_ops);
 460         return 0;
 461 }
 462
 463 static struct platform_driver exynos_drm_platform_driver = {
 464         .probe  = exynos_drm_platform_probe,
 465         .remove = exynos_drm_platform_remove,
 466         .driver = {
 467                 .name   = "exynos-drm",
 468                 .pm     = &exynos_drm_pm_ops,
 469         },
 470 };
 471
 472 static struct device *exynos_drm_get_dma_device(void)
 473 {
 474         int i;
 475
 476         for (i = 0; i < ARRAY_SIZE(exynos_drm_drivers); ++i) {
 477                 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i];
 478                 struct device *dev;
 479
 480                 if (!info->driver || !(info->flags & DRM_DMA_DEVICE))
 481                         continue;
 482
 483                 while ((dev = bus_find_device(&platform_bus_type, NULL,
 484                                             &info->driver->driver,
 485                                             (void *)platform_bus_type.match))) {
 486                         put_device(dev);
 487                         return dev;
 488                 }
 489         }
 490         return NULL;
 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");