drivers/gpu/drm/exynos/exynos_drm_drv.c

   1 /*
   2  * Copyright (c) 2011 Samsung Electronics Co., Ltd.
   3  * Authors:
   4  *      Inki Dae <[email protected]>
   5  *      Joonyoung Shim <[email protected]>
   6  *      Seung-Woo Kim <[email protected]>
   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_vidi.h"
  31 #include "exynos_drm_g2d.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 int exynos_atomic_check(struct drm_device *dev,
  41                         struct drm_atomic_state *state)
  42 {
  43         int ret;
  44
  45         ret = drm_atomic_helper_check_modeset(dev, state);
  46         if (ret)
  47                 return ret;
  48
  49         ret = drm_atomic_normalize_zpos(dev, state);
  50         if (ret)
  51                 return ret;
  52
  53         ret = drm_atomic_helper_check_planes(dev, state);
  54         if (ret)
  55                 return ret;
  56
  57         return ret;
  58 }
  59
  60 static int exynos_drm_open(struct drm_device *dev, struct drm_file *file)
  61 {
  62         struct drm_exynos_file_private *file_priv;
  63         int ret;
  64
  65         file_priv = kzalloc(sizeof(*file_priv), GFP_KERNEL);
  66         if (!file_priv)
  67                 return -ENOMEM;
  68
  69         file->driver_priv = file_priv;
  70
  71         ret = exynos_drm_subdrv_open(dev, file);
  72         if (ret)
  73                 goto err_file_priv_free;
  74
  75         return ret;
  76
  77 err_file_priv_free:
  78         kfree(file_priv);
  79         file->driver_priv = NULL;
  80         return ret;
  81 }
  82
  83 static void exynos_drm_postclose(struct drm_device *dev, struct drm_file *file)
  84 {
  85         exynos_drm_subdrv_close(dev, file);
  86         kfree(file->driver_priv);
  87         file->driver_priv = NULL;
  88 }
  89
  90 static const struct vm_operations_struct exynos_drm_gem_vm_ops = {
  91         .fault = exynos_drm_gem_fault,
  92         .open = drm_gem_vm_open,
  93         .close = drm_gem_vm_close,
  94 };
  95
  96 static const struct drm_ioctl_desc exynos_ioctls[] = {
  97         DRM_IOCTL_DEF_DRV(EXYNOS_GEM_CREATE, exynos_drm_gem_create_ioctl,
  98                         DRM_AUTH | DRM_RENDER_ALLOW),
  99         DRM_IOCTL_DEF_DRV(EXYNOS_GEM_MAP, exynos_drm_gem_map_ioctl,
 100                         DRM_AUTH | DRM_RENDER_ALLOW),
 101         DRM_IOCTL_DEF_DRV(EXYNOS_GEM_GET, exynos_drm_gem_get_ioctl,
 102                         DRM_RENDER_ALLOW),
 103         DRM_IOCTL_DEF_DRV(EXYNOS_VIDI_CONNECTION, vidi_connection_ioctl,
 104                         DRM_AUTH),
 105         DRM_IOCTL_DEF_DRV(EXYNOS_G2D_GET_VER, exynos_g2d_get_ver_ioctl,
 106                         DRM_AUTH | DRM_RENDER_ALLOW),
 107         DRM_IOCTL_DEF_DRV(EXYNOS_G2D_SET_CMDLIST, exynos_g2d_set_cmdlist_ioctl,
 108                         DRM_AUTH | DRM_RENDER_ALLOW),
 109         DRM_IOCTL_DEF_DRV(EXYNOS_G2D_EXEC, exynos_g2d_exec_ioctl,
 110                         DRM_AUTH | DRM_RENDER_ALLOW),
 111 };
 112
 113 static const struct file_operations exynos_drm_driver_fops = {
 114         .owner          = THIS_MODULE,
 115         .open           = drm_open,
 116         .mmap           = exynos_drm_gem_mmap,
 117         .poll           = drm_poll,
 118         .read           = drm_read,
 119         .unlocked_ioctl = drm_ioctl,
 120         .compat_ioctl = drm_compat_ioctl,
 121         .release        = drm_release,
 122 };
 123
 124 static struct drm_driver exynos_drm_driver = {
 125         .driver_features        = DRIVER_MODESET | DRIVER_GEM | DRIVER_PRIME
 126                                   | DRIVER_ATOMIC | DRIVER_RENDER,
 127         .open                   = exynos_drm_open,
 128         .lastclose              = drm_fb_helper_lastclose,
 129         .postclose              = exynos_drm_postclose,
 130         .gem_free_object_unlocked = exynos_drm_gem_free_object,
 131         .gem_vm_ops             = &exynos_drm_gem_vm_ops,
 132         .dumb_create            = exynos_drm_gem_dumb_create,
 133         .prime_handle_to_fd     = drm_gem_prime_handle_to_fd,
 134         .prime_fd_to_handle     = drm_gem_prime_fd_to_handle,
 135         .gem_prime_export       = drm_gem_prime_export,
 136         .gem_prime_import       = exynos_drm_gem_prime_import,
 137         .gem_prime_get_sg_table = exynos_drm_gem_prime_get_sg_table,
 138         .gem_prime_import_sg_table      = exynos_drm_gem_prime_import_sg_table,
 139         .gem_prime_vmap         = exynos_drm_gem_prime_vmap,
 140         .gem_prime_vunmap       = exynos_drm_gem_prime_vunmap,
 141         .gem_prime_mmap         = exynos_drm_gem_prime_mmap,
 142         .ioctls                 = exynos_ioctls,
 143         .num_ioctls             = ARRAY_SIZE(exynos_ioctls),
 144         .fops                   = &exynos_drm_driver_fops,
 145         .name   = DRIVER_NAME,
 146         .desc   = DRIVER_DESC,
 147         .date   = DRIVER_DATE,
 148         .major  = DRIVER_MAJOR,
 149         .minor  = DRIVER_MINOR,
 150 };
 151
 152 #ifdef CONFIG_PM_SLEEP
 153 static int exynos_drm_suspend(struct device *dev)
 154 {
 155         struct drm_device *drm_dev = dev_get_drvdata(dev);
 156         struct exynos_drm_private *private;
 157
 158         if (pm_runtime_suspended(dev) || !drm_dev)
 159                 return 0;
 160
 161         private = drm_dev->dev_private;
 162
 163         drm_kms_helper_poll_disable(drm_dev);
 164         exynos_drm_fbdev_suspend(drm_dev);
 165         private->suspend_state = drm_atomic_helper_suspend(drm_dev);
 166         if (IS_ERR(private->suspend_state)) {
 167                 exynos_drm_fbdev_resume(drm_dev);
 168                 drm_kms_helper_poll_enable(drm_dev);
 169                 return PTR_ERR(private->suspend_state);
 170         }
 171
 172         return 0;
 173 }
 174
 175 static int exynos_drm_resume(struct device *dev)
 176 {
 177         struct drm_device *drm_dev = dev_get_drvdata(dev);
 178         struct exynos_drm_private *private;
 179
 180         if (pm_runtime_suspended(dev) || !drm_dev)
 181                 return 0;
 182
 183         private = drm_dev->dev_private;
 184         drm_atomic_helper_resume(drm_dev, private->suspend_state);
 185         exynos_drm_fbdev_resume(drm_dev);
 186         drm_kms_helper_poll_enable(drm_dev);
 187
 188         return 0;
 189 }
 190 #endif
 191
 192 static const struct dev_pm_ops exynos_drm_pm_ops = {
 193         SET_SYSTEM_SLEEP_PM_OPS(exynos_drm_suspend, exynos_drm_resume)
 194 };
 195
 196 /* forward declaration */
 197 static struct platform_driver exynos_drm_platform_driver;
 198
 199 struct exynos_drm_driver_info {
 200         struct platform_driver *driver;
 201         unsigned int flags;
 202 };
 203
 204 #define DRM_COMPONENT_DRIVER    BIT(0)  /* supports component framework */
 205 #define DRM_VIRTUAL_DEVICE      BIT(1)  /* create virtual platform device */
 206 #define DRM_DMA_DEVICE          BIT(2)  /* can be used for dma allocations */
 207
 208 #define DRV_PTR(drv, cond) (IS_ENABLED(cond) ? &drv : NULL)
 209
 210 /*
 211  * Connector drivers should not be placed before associated crtc drivers,
 212  * because connector requires pipe number of its crtc during initialization.
 213  */
 214 static struct exynos_drm_driver_info exynos_drm_drivers[] = {
 215         {
 216                 DRV_PTR(fimd_driver, CONFIG_DRM_EXYNOS_FIMD),
 217                 DRM_COMPONENT_DRIVER | DRM_DMA_DEVICE
 218         }, {
 219                 DRV_PTR(exynos5433_decon_driver, CONFIG_DRM_EXYNOS5433_DECON),
 220                 DRM_COMPONENT_DRIVER | DRM_DMA_DEVICE
 221         }, {
 222                 DRV_PTR(decon_driver, CONFIG_DRM_EXYNOS7_DECON),
 223                 DRM_COMPONENT_DRIVER | DRM_DMA_DEVICE
 224         }, {
 225                 DRV_PTR(mixer_driver, CONFIG_DRM_EXYNOS_MIXER),
 226                 DRM_COMPONENT_DRIVER | DRM_DMA_DEVICE
 227         }, {
 228                 DRV_PTR(mic_driver, CONFIG_DRM_EXYNOS_MIC),
 229                 DRM_COMPONENT_DRIVER
 230         }, {
 231                 DRV_PTR(dp_driver, CONFIG_DRM_EXYNOS_DP),
 232                 DRM_COMPONENT_DRIVER
 233         }, {
 234                 DRV_PTR(dsi_driver, CONFIG_DRM_EXYNOS_DSI),
 235                 DRM_COMPONENT_DRIVER
 236         }, {
 237                 DRV_PTR(hdmi_driver, CONFIG_DRM_EXYNOS_HDMI),
 238                 DRM_COMPONENT_DRIVER
 239         }, {
 240                 DRV_PTR(vidi_driver, CONFIG_DRM_EXYNOS_VIDI),
 241                 DRM_COMPONENT_DRIVER | DRM_VIRTUAL_DEVICE
 242         }, {
 243                 DRV_PTR(g2d_driver, CONFIG_DRM_EXYNOS_G2D),
 244         }, {
 245                 DRV_PTR(fimc_driver, CONFIG_DRM_EXYNOS_FIMC),
 246         }, {
 247                 DRV_PTR(rotator_driver, CONFIG_DRM_EXYNOS_ROTATOR),
 248         }, {
 249                 DRV_PTR(gsc_driver, CONFIG_DRM_EXYNOS_GSC),
 250         }, {
 251                 &exynos_drm_platform_driver,
 252                 DRM_VIRTUAL_DEVICE
 253         }
 254 };
 255
 256 static int compare_dev(struct device *dev, void *data)
 257 {
 258         return dev == (struct device *)data;
 259 }
 260
 261 static struct component_match *exynos_drm_match_add(struct device *dev)
 262 {
 263         struct component_match *match = NULL;
 264         int i;
 265
 266         for (i = 0; i < ARRAY_SIZE(exynos_drm_drivers); ++i) {
 267                 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i];
 268                 struct device *p = NULL, *d;
 269
 270                 if (!info->driver || !(info->flags & DRM_COMPONENT_DRIVER))
 271                         continue;
 272
 273                 while ((d = bus_find_device(&platform_bus_type, p,
 274                                             &info->driver->driver,
 275                                             (void *)platform_bus_type.match))) {
 276                         put_device(p);
 277                         component_match_add(dev, &match, compare_dev, d);
 278                         p = d;
 279                 }
 280                 put_device(p);
 281         }
 282
 283         return match ?: ERR_PTR(-ENODEV);
 284 }
 285
 286 static struct device *exynos_drm_get_dma_device(void)
 287 {
 288         int i;
 289
 290         for (i = 0; i < ARRAY_SIZE(exynos_drm_drivers); ++i) {
 291                 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i];
 292                 struct device *dev;
 293
 294                 if (!info->driver || !(info->flags & DRM_DMA_DEVICE))
 295                         continue;
 296
 297                 while ((dev = bus_find_device(&platform_bus_type, NULL,
 298                                             &info->driver->driver,
 299                                             (void *)platform_bus_type.match))) {
 300                         put_device(dev);
 301                         return dev;
 302                 }
 303         }
 304         return NULL;
 305 }
 306
 307 static int exynos_drm_bind(struct device *dev)
 308 {
 309         struct exynos_drm_private *private;
 310         struct drm_encoder *encoder;
 311         struct drm_device *drm;
 312         unsigned int clone_mask;
 313         int cnt, ret;
 314
 315         drm = drm_dev_alloc(&exynos_drm_driver, dev);
 316         if (IS_ERR(drm))
 317                 return PTR_ERR(drm);
 318
 319         private = kzalloc(sizeof(struct exynos_drm_private), GFP_KERNEL);
 320         if (!private) {
 321                 ret = -ENOMEM;
 322                 goto err_free_drm;
 323         }
 324
 325         init_waitqueue_head(&private->wait);
 326         spin_lock_init(&private->lock);
 327
 328         dev_set_drvdata(dev, drm);
 329         drm->dev_private = (void *)private;
 330
 331         /* the first real CRTC device is used for all dma mapping operations */
 332         private->dma_dev = exynos_drm_get_dma_device();
 333         if (!private->dma_dev) {
 334                 DRM_ERROR("no device found for DMA mapping operations.\n");
 335                 ret = -ENODEV;
 336                 goto err_free_private;
 337         }
 338         DRM_INFO("Exynos DRM: using %s device for DMA mapping operations\n",
 339                  dev_name(private->dma_dev));
 340
 341         /* create common IOMMU mapping for all devices attached to Exynos DRM */
 342         ret = drm_create_iommu_mapping(drm);
 343         if (ret < 0) {
 344                 DRM_ERROR("failed to create iommu mapping.\n");
 345                 goto err_free_private;
 346         }
 347
 348         drm_mode_config_init(drm);
 349
 350         exynos_drm_mode_config_init(drm);
 351
 352         /* setup possible_clones. */
 353         cnt = 0;
 354         clone_mask = 0;
 355         list_for_each_entry(encoder, &drm->mode_config.encoder_list, head)
 356                 clone_mask |= (1 << (cnt++));
 357
 358         list_for_each_entry(encoder, &drm->mode_config.encoder_list, head)
 359                 encoder->possible_clones = clone_mask;
 360
 361         /* Try to bind all sub drivers. */
 362         ret = component_bind_all(drm->dev, drm);
 363         if (ret)
 364                 goto err_mode_config_cleanup;
 365
 366         ret = drm_vblank_init(drm, drm->mode_config.num_crtc);
 367         if (ret)
 368                 goto err_unbind_all;
 369
 370         /* Probe non kms sub drivers and virtual display driver. */
 371         ret = exynos_drm_device_subdrv_probe(drm);
 372         if (ret)
 373                 goto err_unbind_all;
 374
 375         drm_mode_config_reset(drm);
 376
 377         /*
 378          * enable drm irq mode.
 379          * - with irq_enabled = true, we can use the vblank feature.
 380          *
 381          * P.S. note that we wouldn't use drm irq handler but
 382          *      just specific driver own one instead because
 383          *      drm framework supports only one irq handler.
 384          */
 385         drm->irq_enabled = true;
 386
 387         /* init kms poll for handling hpd */
 388         drm_kms_helper_poll_init(drm);
 389
 390         ret = exynos_drm_fbdev_init(drm);
 391         if (ret)
 392                 goto err_cleanup_poll;
 393
 394         /* register the DRM device */
 395         ret = drm_dev_register(drm, 0);
 396         if (ret < 0)
 397                 goto err_cleanup_fbdev;
 398
 399         return 0;
 400
 401 err_cleanup_fbdev:
 402         exynos_drm_fbdev_fini(drm);
 403 err_cleanup_poll:
 404         drm_kms_helper_poll_fini(drm);
 405         exynos_drm_device_subdrv_remove(drm);
 406 err_unbind_all:
 407         component_unbind_all(drm->dev, drm);
 408 err_mode_config_cleanup:
 409         drm_mode_config_cleanup(drm);
 410         drm_release_iommu_mapping(drm);
 411 err_free_private:
 412         kfree(private);
 413 err_free_drm:
 414         drm_dev_unref(drm);
 415
 416         return ret;
 417 }
 418
 419 static void exynos_drm_unbind(struct device *dev)
 420 {
 421         struct drm_device *drm = dev_get_drvdata(dev);
 422
 423         drm_dev_unregister(drm);
 424
 425         exynos_drm_device_subdrv_remove(drm);
 426
 427         exynos_drm_fbdev_fini(drm);
 428         drm_kms_helper_poll_fini(drm);
 429
 430         component_unbind_all(drm->dev, drm);
 431         drm_mode_config_cleanup(drm);
 432         drm_release_iommu_mapping(drm);
 433
 434         kfree(drm->dev_private);
 435         drm->dev_private = NULL;
 436         dev_set_drvdata(dev, NULL);
 437
 438         drm_dev_unref(drm);
 439 }
 440
 441 static const struct component_master_ops exynos_drm_ops = {
 442         .bind           = exynos_drm_bind,
 443         .unbind         = exynos_drm_unbind,
 444 };
 445
 446 static int exynos_drm_platform_probe(struct platform_device *pdev)
 447 {
 448         struct component_match *match;
 449
 450         pdev->dev.coherent_dma_mask = DMA_BIT_MASK(32);
 451
 452         match = exynos_drm_match_add(&pdev->dev);
 453         if (IS_ERR(match))
 454                 return PTR_ERR(match);
 455
 456         return component_master_add_with_match(&pdev->dev, &exynos_drm_ops,
 457                                                match);
 458 }
 459
 460 static int exynos_drm_platform_remove(struct platform_device *pdev)
 461 {
 462         component_master_del(&pdev->dev, &exynos_drm_ops);
 463         return 0;
 464 }
 465
 466 static struct platform_driver exynos_drm_platform_driver = {
 467         .probe  = exynos_drm_platform_probe,
 468         .remove = exynos_drm_platform_remove,
 469         .driver = {
 470                 .name   = "exynos-drm",
 471                 .pm     = &exynos_drm_pm_ops,
 472         },
 473 };
 474
 475 static void exynos_drm_unregister_devices(void)
 476 {
 477         int i;
 478
 479         for (i = ARRAY_SIZE(exynos_drm_drivers) - 1; i >= 0; --i) {
 480                 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i];
 481                 struct device *dev;
 482
 483                 if (!info->driver || !(info->flags & DRM_VIRTUAL_DEVICE))
 484                         continue;
 485
 486                 while ((dev = bus_find_device(&platform_bus_type, NULL,
 487                                             &info->driver->driver,
 488                                             (void *)platform_bus_type.match))) {
 489                         put_device(dev);
 490                         platform_device_unregister(to_platform_device(dev));
 491                 }
 492         }
 493 }
 494
 495 static int exynos_drm_register_devices(void)
 496 {
 497         struct platform_device *pdev;
 498         int i;
 499
 500         for (i = 0; i < ARRAY_SIZE(exynos_drm_drivers); ++i) {
 501                 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i];
 502
 503                 if (!info->driver || !(info->flags & DRM_VIRTUAL_DEVICE))
 504                         continue;
 505
 506                 pdev = platform_device_register_simple(
 507                                         info->driver->driver.name, -1, NULL, 0);
 508                 if (IS_ERR(pdev))
 509                         goto fail;
 510         }
 511
 512         return 0;
 513 fail:
 514         exynos_drm_unregister_devices();
 515         return PTR_ERR(pdev);
 516 }
 517
 518 static void exynos_drm_unregister_drivers(void)
 519 {
 520         int i;
 521
 522         for (i = ARRAY_SIZE(exynos_drm_drivers) - 1; i >= 0; --i) {
 523                 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i];
 524
 525                 if (!info->driver)
 526                         continue;
 527
 528                 platform_driver_unregister(info->driver);
 529         }
 530 }
 531
 532 static int exynos_drm_register_drivers(void)
 533 {
 534         int i, ret;
 535
 536         for (i = 0; i < ARRAY_SIZE(exynos_drm_drivers); ++i) {
 537                 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i];
 538
 539                 if (!info->driver)
 540                         continue;
 541
 542                 ret = platform_driver_register(info->driver);
 543                 if (ret)
 544                         goto fail;
 545         }
 546         return 0;
 547 fail:
 548         exynos_drm_unregister_drivers();
 549         return ret;
 550 }
 551
 552 static int exynos_drm_init(void)
 553 {
 554         int ret;
 555
 556         ret = exynos_drm_register_devices();
 557         if (ret)
 558                 return ret;
 559
 560         ret = exynos_drm_register_drivers();
 561         if (ret)
 562                 goto err_unregister_pdevs;
 563
 564         return 0;
 565
 566 err_unregister_pdevs:
 567         exynos_drm_unregister_devices();
 568
 569         return ret;
 570 }
 571
 572 static void exynos_drm_exit(void)
 573 {
 574         exynos_drm_unregister_drivers();
 575         exynos_drm_unregister_devices();
 576 }
 577
 578 module_init(exynos_drm_init);
 579 module_exit(exynos_drm_exit);
 580
 581 MODULE_AUTHOR("Inki Dae <[email protected]>");
 582 MODULE_AUTHOR("Joonyoung Shim <[email protected]>");
 583 MODULE_AUTHOR("Seung-Woo Kim <[email protected]>");
 584 MODULE_DESCRIPTION("Samsung SoC DRM Driver");
 585 MODULE_LICENSE("GPL");