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