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 static int exynos_drm_open(struct drm_device *dev, struct drm_file *file)
  49 {
  50         struct drm_exynos_file_private *file_priv;
  51         int ret;
  52
  53         file_priv = kzalloc(sizeof(*file_priv), GFP_KERNEL);
  54         if (!file_priv)
  55                 return -ENOMEM;
  56
  57         file->driver_priv = file_priv;
  58
  59         ret = exynos_drm_subdrv_open(dev, file);
  60         if (ret)
  61                 goto err_file_priv_free;
  62
  63         return ret;
  64
  65 err_file_priv_free:
  66         kfree(file_priv);
  67         file->driver_priv = NULL;
  68         return ret;
  69 }
  70
  71 static void exynos_drm_postclose(struct drm_device *dev, struct drm_file *file)
  72 {
  73         exynos_drm_subdrv_close(dev, file);
  74         kfree(file->driver_priv);
  75         file->driver_priv = NULL;
  76 }
  77
  78 static const struct vm_operations_struct exynos_drm_gem_vm_ops = {
  79         .fault = exynos_drm_gem_fault,
  80         .open = drm_gem_vm_open,
  81         .close = drm_gem_vm_close,
  82 };
  83
  84 static const struct drm_ioctl_desc exynos_ioctls[] = {
  85         DRM_IOCTL_DEF_DRV(EXYNOS_GEM_CREATE, exynos_drm_gem_create_ioctl,
  86                         DRM_AUTH | DRM_RENDER_ALLOW),
  87         DRM_IOCTL_DEF_DRV(EXYNOS_GEM_MAP, exynos_drm_gem_map_ioctl,
  88                         DRM_AUTH | DRM_RENDER_ALLOW),
  89         DRM_IOCTL_DEF_DRV(EXYNOS_GEM_GET, exynos_drm_gem_get_ioctl,
  90                         DRM_RENDER_ALLOW),
  91         DRM_IOCTL_DEF_DRV(EXYNOS_VIDI_CONNECTION, vidi_connection_ioctl,
  92                         DRM_AUTH),
  93         DRM_IOCTL_DEF_DRV(EXYNOS_G2D_GET_VER, exynos_g2d_get_ver_ioctl,
  94                         DRM_AUTH | DRM_RENDER_ALLOW),
  95         DRM_IOCTL_DEF_DRV(EXYNOS_G2D_SET_CMDLIST, exynos_g2d_set_cmdlist_ioctl,
  96                         DRM_AUTH | DRM_RENDER_ALLOW),
  97         DRM_IOCTL_DEF_DRV(EXYNOS_G2D_EXEC, exynos_g2d_exec_ioctl,
  98                         DRM_AUTH | DRM_RENDER_ALLOW),
  99         DRM_IOCTL_DEF_DRV(EXYNOS_IPP_GET_RESOURCES,
 100                         exynos_drm_ipp_get_res_ioctl,
 101                         DRM_AUTH | DRM_RENDER_ALLOW),
 102         DRM_IOCTL_DEF_DRV(EXYNOS_IPP_GET_CAPS, exynos_drm_ipp_get_caps_ioctl,
 103                         DRM_AUTH | DRM_RENDER_ALLOW),
 104         DRM_IOCTL_DEF_DRV(EXYNOS_IPP_GET_LIMITS,
 105                         exynos_drm_ipp_get_limits_ioctl,
 106                         DRM_AUTH | DRM_RENDER_ALLOW),
 107         DRM_IOCTL_DEF_DRV(EXYNOS_IPP_COMMIT, exynos_drm_ipp_commit_ioctl,
 108                         DRM_AUTH | DRM_RENDER_ALLOW),
 109 };
 110
 111 static const struct file_operations exynos_drm_driver_fops = {
 112         .owner          = THIS_MODULE,
 113         .open           = drm_open,
 114         .mmap           = exynos_drm_gem_mmap,
 115         .poll           = drm_poll,
 116         .read           = drm_read,
 117         .unlocked_ioctl = drm_ioctl,
 118         .compat_ioctl = drm_compat_ioctl,
 119         .release        = drm_release,
 120 };
 121
 122 static struct drm_driver exynos_drm_driver = {
 123         .driver_features        = DRIVER_MODESET | DRIVER_GEM | DRIVER_PRIME
 124                                   | DRIVER_ATOMIC | DRIVER_RENDER,
 125         .open                   = exynos_drm_open,
 126         .lastclose              = drm_fb_helper_lastclose,
 127         .postclose              = exynos_drm_postclose,
 128         .gem_free_object_unlocked = exynos_drm_gem_free_object,
 129         .gem_vm_ops             = &exynos_drm_gem_vm_ops,
 130         .dumb_create            = exynos_drm_gem_dumb_create,
 131         .prime_handle_to_fd     = drm_gem_prime_handle_to_fd,
 132         .prime_fd_to_handle     = drm_gem_prime_fd_to_handle,
 133         .gem_prime_export       = drm_gem_prime_export,
 134         .gem_prime_import       = exynos_drm_gem_prime_import,
 135         .gem_prime_get_sg_table = exynos_drm_gem_prime_get_sg_table,
 136         .gem_prime_import_sg_table      = exynos_drm_gem_prime_import_sg_table,
 137         .gem_prime_vmap         = exynos_drm_gem_prime_vmap,
 138         .gem_prime_vunmap       = exynos_drm_gem_prime_vunmap,
 139         .gem_prime_mmap         = exynos_drm_gem_prime_mmap,
 140         .ioctls                 = exynos_ioctls,
 141         .num_ioctls             = ARRAY_SIZE(exynos_ioctls),
 142         .fops                   = &exynos_drm_driver_fops,
 143         .name   = DRIVER_NAME,
 144         .desc   = DRIVER_DESC,
 145         .date   = DRIVER_DATE,
 146         .major  = DRIVER_MAJOR,
 147         .minor  = DRIVER_MINOR,
 148 };
 149
 150 #ifdef CONFIG_PM_SLEEP
 151 static int exynos_drm_suspend(struct device *dev)
 152 {
 153         struct drm_device *drm_dev = dev_get_drvdata(dev);
 154         struct exynos_drm_private *private;
 155
 156         if (pm_runtime_suspended(dev) || !drm_dev)
 157                 return 0;
 158
 159         private = drm_dev->dev_private;
 160
 161         drm_kms_helper_poll_disable(drm_dev);
 162         exynos_drm_fbdev_suspend(drm_dev);
 163         private->suspend_state = drm_atomic_helper_suspend(drm_dev);
 164         if (IS_ERR(private->suspend_state)) {
 165                 exynos_drm_fbdev_resume(drm_dev);
 166                 drm_kms_helper_poll_enable(drm_dev);
 167                 return PTR_ERR(private->suspend_state);
 168         }
 169
 170         return 0;
 171 }
 172
 173 static int exynos_drm_resume(struct device *dev)
 174 {
 175         struct drm_device *drm_dev = dev_get_drvdata(dev);
 176         struct exynos_drm_private *private;
 177
 178         if (pm_runtime_suspended(dev) || !drm_dev)
 179                 return 0;
 180
 181         private = drm_dev->dev_private;
 182         drm_atomic_helper_resume(drm_dev, private->suspend_state);
 183         exynos_drm_fbdev_resume(drm_dev);
 184         drm_kms_helper_poll_enable(drm_dev);
 185
 186         return 0;
 187 }
 188 #endif
 189
 190 static const struct dev_pm_ops exynos_drm_pm_ops = {
 191         SET_SYSTEM_SLEEP_PM_OPS(exynos_drm_suspend, exynos_drm_resume)
 192 };
 193
 194 /* forward declaration */
 195 static struct platform_driver exynos_drm_platform_driver;
 196
 197 struct exynos_drm_driver_info {
 198         struct platform_driver *driver;
 199         unsigned int flags;
 200 };
 201
 202 #define DRM_COMPONENT_DRIVER    BIT(0)  /* supports component framework */
 203 #define DRM_VIRTUAL_DEVICE      BIT(1)  /* create virtual platform device */
 204 #define DRM_DMA_DEVICE          BIT(2)  /* can be used for dma allocations */
 205 #define DRM_FIMC_DEVICE         BIT(3)  /* devices shared with V4L2 subsystem */
 206
 207 #define DRV_PTR(drv, cond) (IS_ENABLED(cond) ? &drv : NULL)
 208
 209 /*
 210  * Connector drivers should not be placed before associated crtc drivers,
 211  * because connector requires pipe number of its crtc during initialization.
 212  */
 213 static struct exynos_drm_driver_info exynos_drm_drivers[] = {
 214         {
 215                 DRV_PTR(fimd_driver, CONFIG_DRM_EXYNOS_FIMD),
 216                 DRM_COMPONENT_DRIVER | DRM_DMA_DEVICE
 217         }, {
 218                 DRV_PTR(exynos5433_decon_driver, CONFIG_DRM_EXYNOS5433_DECON),
 219                 DRM_COMPONENT_DRIVER | DRM_DMA_DEVICE
 220         }, {
 221                 DRV_PTR(decon_driver, CONFIG_DRM_EXYNOS7_DECON),
 222                 DRM_COMPONENT_DRIVER | DRM_DMA_DEVICE
 223         }, {
 224                 DRV_PTR(mixer_driver, CONFIG_DRM_EXYNOS_MIXER),
 225                 DRM_COMPONENT_DRIVER | DRM_DMA_DEVICE
 226         }, {
 227                 DRV_PTR(mic_driver, CONFIG_DRM_EXYNOS_MIC),
 228                 DRM_COMPONENT_DRIVER
 229         }, {
 230                 DRV_PTR(dp_driver, CONFIG_DRM_EXYNOS_DP),
 231                 DRM_COMPONENT_DRIVER
 232         }, {
 233                 DRV_PTR(dsi_driver, CONFIG_DRM_EXYNOS_DSI),
 234                 DRM_COMPONENT_DRIVER
 235         }, {
 236                 DRV_PTR(hdmi_driver, CONFIG_DRM_EXYNOS_HDMI),
 237                 DRM_COMPONENT_DRIVER
 238         }, {
 239                 DRV_PTR(vidi_driver, CONFIG_DRM_EXYNOS_VIDI),
 240                 DRM_COMPONENT_DRIVER | DRM_VIRTUAL_DEVICE
 241         }, {
 242                 DRV_PTR(g2d_driver, CONFIG_DRM_EXYNOS_G2D),
 243         }, {
 244                 DRV_PTR(fimc_driver, CONFIG_DRM_EXYNOS_FIMC),
 245                 DRM_COMPONENT_DRIVER | DRM_FIMC_DEVICE,
 246         }, {
 247                 DRV_PTR(rotator_driver, CONFIG_DRM_EXYNOS_ROTATOR),
 248                 DRM_COMPONENT_DRIVER
 249         }, {
 250                 DRV_PTR(scaler_driver, CONFIG_DRM_EXYNOS_SCALER),
 251                 DRM_COMPONENT_DRIVER
 252         }, {
 253                 DRV_PTR(gsc_driver, CONFIG_DRM_EXYNOS_GSC),
 254                 DRM_COMPONENT_DRIVER
 255         }, {
 256                 &exynos_drm_platform_driver,
 257                 DRM_VIRTUAL_DEVICE
 258         }
 259 };
 260
 261 static int compare_dev(struct device *dev, void *data)
 262 {
 263         return dev == (struct device *)data;
 264 }
 265
 266 static struct component_match *exynos_drm_match_add(struct device *dev)
 267 {
 268         struct component_match *match = NULL;
 269         int i;
 270
 271         for (i = 0; i < ARRAY_SIZE(exynos_drm_drivers); ++i) {
 272                 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i];
 273                 struct device *p = NULL, *d;
 274
 275                 if (!info->driver || !(info->flags & DRM_COMPONENT_DRIVER))
 276                         continue;
 277
 278                 while ((d = bus_find_device(&platform_bus_type, p,
 279                                             &info->driver->driver,
 280                                             (void *)platform_bus_type.match))) {
 281                         put_device(p);
 282
 283                         if (!(info->flags & DRM_FIMC_DEVICE) ||
 284                             exynos_drm_check_fimc_device(d) == 0)
 285                                 component_match_add(dev, &match,
 286                                                     compare_dev, d);
 287                         p = d;
 288                 }
 289                 put_device(p);
 290         }
 291
 292         return match ?: ERR_PTR(-ENODEV);
 293 }
 294
 295 static struct device *exynos_drm_get_dma_device(void)
 296 {
 297         int i;
 298
 299         for (i = 0; i < ARRAY_SIZE(exynos_drm_drivers); ++i) {
 300                 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i];
 301                 struct device *dev;
 302
 303                 if (!info->driver || !(info->flags & DRM_DMA_DEVICE))
 304                         continue;
 305
 306                 while ((dev = bus_find_device(&platform_bus_type, NULL,
 307                                             &info->driver->driver,
 308                                             (void *)platform_bus_type.match))) {
 309                         put_device(dev);
 310                         return dev;
 311                 }
 312         }
 313         return NULL;
 314 }
 315
 316 static int exynos_drm_bind(struct device *dev)
 317 {
 318         struct exynos_drm_private *private;
 319         struct drm_encoder *encoder;
 320         struct drm_device *drm;
 321         unsigned int clone_mask;
 322         int cnt, ret;
 323
 324         drm = drm_dev_alloc(&exynos_drm_driver, dev);
 325         if (IS_ERR(drm))
 326                 return PTR_ERR(drm);
 327
 328         private = kzalloc(sizeof(struct exynos_drm_private), GFP_KERNEL);
 329         if (!private) {
 330                 ret = -ENOMEM;
 331                 goto err_free_drm;
 332         }
 333
 334         init_waitqueue_head(&private->wait);
 335         spin_lock_init(&private->lock);
 336
 337         dev_set_drvdata(dev, drm);
 338         drm->dev_private = (void *)private;
 339
 340         /* the first real CRTC device is used for all dma mapping operations */
 341         private->dma_dev = exynos_drm_get_dma_device();
 342         if (!private->dma_dev) {
 343                 DRM_ERROR("no device found for DMA mapping operations.\n");
 344                 ret = -ENODEV;
 345                 goto err_free_private;
 346         }
 347         DRM_INFO("Exynos DRM: using %s device for DMA mapping operations\n",
 348                  dev_name(private->dma_dev));
 349
 350         /* create common IOMMU mapping for all devices attached to Exynos DRM */
 351         ret = drm_create_iommu_mapping(drm);
 352         if (ret < 0) {
 353                 DRM_ERROR("failed to create iommu mapping.\n");
 354                 goto err_free_private;
 355         }
 356
 357         drm_mode_config_init(drm);
 358
 359         exynos_drm_mode_config_init(drm);
 360
 361         /* setup possible_clones. */
 362         cnt = 0;
 363         clone_mask = 0;
 364         list_for_each_entry(encoder, &drm->mode_config.encoder_list, head)
 365                 clone_mask |= (1 << (cnt++));
 366
 367         list_for_each_entry(encoder, &drm->mode_config.encoder_list, head)
 368                 encoder->possible_clones = clone_mask;
 369
 370         /* Try to bind all sub drivers. */
 371         ret = component_bind_all(drm->dev, drm);
 372         if (ret)
 373                 goto err_mode_config_cleanup;
 374
 375         ret = drm_vblank_init(drm, drm->mode_config.num_crtc);
 376         if (ret)
 377                 goto err_unbind_all;
 378
 379         /* Probe non kms sub drivers and virtual display driver. */
 380         ret = exynos_drm_device_subdrv_probe(drm);
 381         if (ret)
 382                 goto err_unbind_all;
 383
 384         drm_mode_config_reset(drm);
 385
 386         /*
 387          * enable drm irq mode.
 388          * - with irq_enabled = true, we can use the vblank feature.
 389          *
 390          * P.S. note that we wouldn't use drm irq handler but
 391          *      just specific driver own one instead because
 392          *      drm framework supports only one irq handler.
 393          */
 394         drm->irq_enabled = true;
 395
 396         /* init kms poll for handling hpd */
 397         drm_kms_helper_poll_init(drm);
 398
 399         ret = exynos_drm_fbdev_init(drm);
 400         if (ret)
 401                 goto err_cleanup_poll;
 402
 403         /* register the DRM device */
 404         ret = drm_dev_register(drm, 0);
 405         if (ret < 0)
 406                 goto err_cleanup_fbdev;
 407
 408         return 0;
 409
 410 err_cleanup_fbdev:
 411         exynos_drm_fbdev_fini(drm);
 412 err_cleanup_poll:
 413         drm_kms_helper_poll_fini(drm);
 414         exynos_drm_device_subdrv_remove(drm);
 415 err_unbind_all:
 416         component_unbind_all(drm->dev, drm);
 417 err_mode_config_cleanup:
 418         drm_mode_config_cleanup(drm);
 419         drm_release_iommu_mapping(drm);
 420 err_free_private:
 421         kfree(private);
 422 err_free_drm:
 423         drm_dev_put(drm);
 424
 425         return ret;
 426 }
 427
 428 static void exynos_drm_unbind(struct device *dev)
 429 {
 430         struct drm_device *drm = dev_get_drvdata(dev);
 431
 432         drm_dev_unregister(drm);
 433
 434         exynos_drm_device_subdrv_remove(drm);
 435
 436         exynos_drm_fbdev_fini(drm);
 437         drm_kms_helper_poll_fini(drm);
 438
 439         component_unbind_all(drm->dev, drm);
 440         drm_mode_config_cleanup(drm);
 441         drm_release_iommu_mapping(drm);
 442
 443         kfree(drm->dev_private);
 444         drm->dev_private = NULL;
 445         dev_set_drvdata(dev, NULL);
 446
 447         drm_dev_put(drm);
 448 }
 449
 450 static const struct component_master_ops exynos_drm_ops = {
 451         .bind           = exynos_drm_bind,
 452         .unbind         = exynos_drm_unbind,
 453 };
 454
 455 static int exynos_drm_platform_probe(struct platform_device *pdev)
 456 {
 457         struct component_match *match;
 458
 459         pdev->dev.coherent_dma_mask = DMA_BIT_MASK(32);
 460
 461         match = exynos_drm_match_add(&pdev->dev);
 462         if (IS_ERR(match))
 463                 return PTR_ERR(match);
 464
 465         return component_master_add_with_match(&pdev->dev, &exynos_drm_ops,
 466                                                match);
 467 }
 468
 469 static int exynos_drm_platform_remove(struct platform_device *pdev)
 470 {
 471         component_master_del(&pdev->dev, &exynos_drm_ops);
 472         return 0;
 473 }
 474
 475 static struct platform_driver exynos_drm_platform_driver = {
 476         .probe  = exynos_drm_platform_probe,
 477         .remove = exynos_drm_platform_remove,
 478         .driver = {
 479                 .name   = "exynos-drm",
 480                 .pm     = &exynos_drm_pm_ops,
 481         },
 482 };
 483
 484 static void exynos_drm_unregister_devices(void)
 485 {
 486         int i;
 487
 488         for (i = ARRAY_SIZE(exynos_drm_drivers) - 1; i >= 0; --i) {
 489                 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i];
 490                 struct device *dev;
 491
 492                 if (!info->driver || !(info->flags & DRM_VIRTUAL_DEVICE))
 493                         continue;
 494
 495                 while ((dev = bus_find_device(&platform_bus_type, NULL,
 496                                             &info->driver->driver,
 497                                             (void *)platform_bus_type.match))) {
 498                         put_device(dev);
 499                         platform_device_unregister(to_platform_device(dev));
 500                 }
 501         }
 502 }
 503
 504 static int exynos_drm_register_devices(void)
 505 {
 506         struct platform_device *pdev;
 507         int i;
 508
 509         for (i = 0; i < ARRAY_SIZE(exynos_drm_drivers); ++i) {
 510                 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i];
 511
 512                 if (!info->driver || !(info->flags & DRM_VIRTUAL_DEVICE))
 513                         continue;
 514
 515                 pdev = platform_device_register_simple(
 516                                         info->driver->driver.name, -1, NULL, 0);
 517                 if (IS_ERR(pdev))
 518                         goto fail;
 519         }
 520
 521         return 0;
 522 fail:
 523         exynos_drm_unregister_devices();
 524         return PTR_ERR(pdev);
 525 }
 526
 527 static void exynos_drm_unregister_drivers(void)
 528 {
 529         int i;
 530
 531         for (i = ARRAY_SIZE(exynos_drm_drivers) - 1; i >= 0; --i) {
 532                 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i];
 533
 534                 if (!info->driver)
 535                         continue;
 536
 537                 platform_driver_unregister(info->driver);
 538         }
 539 }
 540
 541 static int exynos_drm_register_drivers(void)
 542 {
 543         int i, ret;
 544
 545         for (i = 0; i < ARRAY_SIZE(exynos_drm_drivers); ++i) {
 546                 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i];
 547
 548                 if (!info->driver)
 549                         continue;
 550
 551                 ret = platform_driver_register(info->driver);
 552                 if (ret)
 553                         goto fail;
 554         }
 555         return 0;
 556 fail:
 557         exynos_drm_unregister_drivers();
 558         return ret;
 559 }
 560
 561 static int exynos_drm_init(void)
 562 {
 563         int ret;
 564
 565         ret = exynos_drm_register_devices();
 566         if (ret)
 567                 return ret;
 568
 569         ret = exynos_drm_register_drivers();
 570         if (ret)
 571                 goto err_unregister_pdevs;
 572
 573         return 0;
 574
 575 err_unregister_pdevs:
 576         exynos_drm_unregister_devices();
 577
 578         return ret;
 579 }
 580
 581 static void exynos_drm_exit(void)
 582 {
 583         exynos_drm_unregister_drivers();
 584         exynos_drm_unregister_devices();
 585 }
 586
 587 module_init(exynos_drm_init);
 588 module_exit(exynos_drm_exit);
 589
 590 MODULE_AUTHOR("Inki Dae <inki.dae@samsung.com>");
 591 MODULE_AUTHOR("Joonyoung Shim <jy0922.shim@samsung.com>");
 592 MODULE_AUTHOR("Seung-Woo Kim <sw0312.kim@samsung.com>");
 593 MODULE_DESCRIPTION("Samsung SoC DRM Driver");
 594 MODULE_LICENSE("GPL");