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         ret = g2d_open(dev, file);
  59         if (ret)
  60                 goto err_file_priv_free;
  61
  62         return ret;
  63
  64 err_file_priv_free:
  65         kfree(file_priv);
  66         file->driver_priv = NULL;
  67         return ret;
  68 }
  69
  70 static void exynos_drm_postclose(struct drm_device *dev, struct drm_file *file)
  71 {
  72         g2d_close(dev, file);
  73         kfree(file->driver_priv);
  74         file->driver_priv = NULL;
  75 }
  76
  77 static const struct vm_operations_struct exynos_drm_gem_vm_ops = {
  78         .fault = exynos_drm_gem_fault,
  79         .open = drm_gem_vm_open,
  80         .close = drm_gem_vm_close,
  81 };
  82
  83 static const struct drm_ioctl_desc exynos_ioctls[] = {
  84         DRM_IOCTL_DEF_DRV(EXYNOS_GEM_CREATE, exynos_drm_gem_create_ioctl,
  85                         DRM_AUTH | DRM_RENDER_ALLOW),
  86         DRM_IOCTL_DEF_DRV(EXYNOS_GEM_MAP, exynos_drm_gem_map_ioctl,
  87                         DRM_AUTH | DRM_RENDER_ALLOW),
  88         DRM_IOCTL_DEF_DRV(EXYNOS_GEM_GET, exynos_drm_gem_get_ioctl,
  89                         DRM_RENDER_ALLOW),
  90         DRM_IOCTL_DEF_DRV(EXYNOS_VIDI_CONNECTION, vidi_connection_ioctl,
  91                         DRM_AUTH),
  92         DRM_IOCTL_DEF_DRV(EXYNOS_G2D_GET_VER, exynos_g2d_get_ver_ioctl,
  93                         DRM_AUTH | DRM_RENDER_ALLOW),
  94         DRM_IOCTL_DEF_DRV(EXYNOS_G2D_SET_CMDLIST, exynos_g2d_set_cmdlist_ioctl,
  95                         DRM_AUTH | DRM_RENDER_ALLOW),
  96         DRM_IOCTL_DEF_DRV(EXYNOS_G2D_EXEC, exynos_g2d_exec_ioctl,
  97                         DRM_AUTH | DRM_RENDER_ALLOW),
  98         DRM_IOCTL_DEF_DRV(EXYNOS_IPP_GET_RESOURCES,
  99                         exynos_drm_ipp_get_res_ioctl,
 100                         DRM_AUTH | DRM_RENDER_ALLOW),
 101         DRM_IOCTL_DEF_DRV(EXYNOS_IPP_GET_CAPS, exynos_drm_ipp_get_caps_ioctl,
 102                         DRM_AUTH | DRM_RENDER_ALLOW),
 103         DRM_IOCTL_DEF_DRV(EXYNOS_IPP_GET_LIMITS,
 104                         exynos_drm_ipp_get_limits_ioctl,
 105                         DRM_AUTH | DRM_RENDER_ALLOW),
 106         DRM_IOCTL_DEF_DRV(EXYNOS_IPP_COMMIT, exynos_drm_ipp_commit_ioctl,
 107                         DRM_AUTH | DRM_RENDER_ALLOW),
 108 };
 109
 110 static const struct file_operations exynos_drm_driver_fops = {
 111         .owner          = THIS_MODULE,
 112         .open           = drm_open,
 113         .mmap           = exynos_drm_gem_mmap,
 114         .poll           = drm_poll,
 115         .read           = drm_read,
 116         .unlocked_ioctl = drm_ioctl,
 117         .compat_ioctl = drm_compat_ioctl,
 118         .release        = drm_release,
 119 };
 120
 121 static struct drm_driver exynos_drm_driver = {
 122         .driver_features        = DRIVER_MODESET | DRIVER_GEM | DRIVER_PRIME
 123                                   | DRIVER_ATOMIC | DRIVER_RENDER,
 124         .open                   = exynos_drm_open,
 125         .lastclose              = drm_fb_helper_lastclose,
 126         .postclose              = exynos_drm_postclose,
 127         .gem_free_object_unlocked = exynos_drm_gem_free_object,
 128         .gem_vm_ops             = &exynos_drm_gem_vm_ops,
 129         .dumb_create            = exynos_drm_gem_dumb_create,
 130         .prime_handle_to_fd     = drm_gem_prime_handle_to_fd,
 131         .prime_fd_to_handle     = drm_gem_prime_fd_to_handle,
 132         .gem_prime_export       = drm_gem_prime_export,
 133         .gem_prime_import       = exynos_drm_gem_prime_import,
 134         .gem_prime_get_sg_table = exynos_drm_gem_prime_get_sg_table,
 135         .gem_prime_import_sg_table      = exynos_drm_gem_prime_import_sg_table,
 136         .gem_prime_vmap         = exynos_drm_gem_prime_vmap,
 137         .gem_prime_vunmap       = exynos_drm_gem_prime_vunmap,
 138         .gem_prime_mmap         = exynos_drm_gem_prime_mmap,
 139         .ioctls                 = exynos_ioctls,
 140         .num_ioctls             = ARRAY_SIZE(exynos_ioctls),
 141         .fops                   = &exynos_drm_driver_fops,
 142         .name   = DRIVER_NAME,
 143         .desc   = DRIVER_DESC,
 144         .date   = DRIVER_DATE,
 145         .major  = DRIVER_MAJOR,
 146         .minor  = DRIVER_MINOR,
 147 };
 148
 149 static int exynos_drm_suspend(struct device *dev)
 150 {
 151         struct drm_device *drm_dev = dev_get_drvdata(dev);
 152         struct exynos_drm_private *private;
 153
 154         if (!drm_dev)
 155                 return 0;
 156
 157         private = drm_dev->dev_private;
 158
 159         drm_kms_helper_poll_disable(drm_dev);
 160         exynos_drm_fbdev_suspend(drm_dev);
 161         private->suspend_state = drm_atomic_helper_suspend(drm_dev);
 162         if (IS_ERR(private->suspend_state)) {
 163                 exynos_drm_fbdev_resume(drm_dev);
 164                 drm_kms_helper_poll_enable(drm_dev);
 165                 return PTR_ERR(private->suspend_state);
 166         }
 167
 168         return 0;
 169 }
 170
 171 static void exynos_drm_resume(struct device *dev)
 172 {
 173         struct drm_device *drm_dev = dev_get_drvdata(dev);
 174         struct exynos_drm_private *private;
 175
 176         if (!drm_dev)
 177                 return;
 178
 179         private = drm_dev->dev_private;
 180         drm_atomic_helper_resume(drm_dev, private->suspend_state);
 181         exynos_drm_fbdev_resume(drm_dev);
 182         drm_kms_helper_poll_enable(drm_dev);
 183 }
 184
 185 static const struct dev_pm_ops exynos_drm_pm_ops = {
 186         .prepare = exynos_drm_suspend,
 187         .complete = exynos_drm_resume,
 188 };
 189
 190 /* forward declaration */
 191 static struct platform_driver exynos_drm_platform_driver;
 192
 193 struct exynos_drm_driver_info {
 194         struct platform_driver *driver;
 195         unsigned int flags;
 196 };
 197
 198 #define DRM_COMPONENT_DRIVER    BIT(0)  /* supports component framework */
 199 #define DRM_VIRTUAL_DEVICE      BIT(1)  /* create virtual platform device */
 200 #define DRM_DMA_DEVICE          BIT(2)  /* can be used for dma allocations */
 201 #define DRM_FIMC_DEVICE         BIT(3)  /* devices shared with V4L2 subsystem */
 202
 203 #define DRV_PTR(drv, cond) (IS_ENABLED(cond) ? &drv : NULL)
 204
 205 /*
 206  * Connector drivers should not be placed before associated crtc drivers,
 207  * because connector requires pipe number of its crtc during initialization.
 208  */
 209 static struct exynos_drm_driver_info exynos_drm_drivers[] = {
 210         {
 211                 DRV_PTR(fimd_driver, CONFIG_DRM_EXYNOS_FIMD),
 212                 DRM_COMPONENT_DRIVER | DRM_DMA_DEVICE
 213         }, {
 214                 DRV_PTR(exynos5433_decon_driver, CONFIG_DRM_EXYNOS5433_DECON),
 215                 DRM_COMPONENT_DRIVER | DRM_DMA_DEVICE
 216         }, {
 217                 DRV_PTR(decon_driver, CONFIG_DRM_EXYNOS7_DECON),
 218                 DRM_COMPONENT_DRIVER | DRM_DMA_DEVICE
 219         }, {
 220                 DRV_PTR(mixer_driver, CONFIG_DRM_EXYNOS_MIXER),
 221                 DRM_COMPONENT_DRIVER | DRM_DMA_DEVICE
 222         }, {
 223                 DRV_PTR(mic_driver, CONFIG_DRM_EXYNOS_MIC),
 224                 DRM_COMPONENT_DRIVER
 225         }, {
 226                 DRV_PTR(dp_driver, CONFIG_DRM_EXYNOS_DP),
 227                 DRM_COMPONENT_DRIVER
 228         }, {
 229                 DRV_PTR(dsi_driver, CONFIG_DRM_EXYNOS_DSI),
 230                 DRM_COMPONENT_DRIVER
 231         }, {
 232                 DRV_PTR(hdmi_driver, CONFIG_DRM_EXYNOS_HDMI),
 233                 DRM_COMPONENT_DRIVER
 234         }, {
 235                 DRV_PTR(vidi_driver, CONFIG_DRM_EXYNOS_VIDI),
 236                 DRM_COMPONENT_DRIVER | DRM_VIRTUAL_DEVICE
 237         }, {
 238                 DRV_PTR(g2d_driver, CONFIG_DRM_EXYNOS_G2D),
 239                 DRM_COMPONENT_DRIVER
 240         }, {
 241                 DRV_PTR(fimc_driver, CONFIG_DRM_EXYNOS_FIMC),
 242                 DRM_COMPONENT_DRIVER | DRM_FIMC_DEVICE,
 243         }, {
 244                 DRV_PTR(rotator_driver, CONFIG_DRM_EXYNOS_ROTATOR),
 245                 DRM_COMPONENT_DRIVER
 246         }, {
 247                 DRV_PTR(scaler_driver, CONFIG_DRM_EXYNOS_SCALER),
 248                 DRM_COMPONENT_DRIVER
 249         }, {
 250                 DRV_PTR(gsc_driver, CONFIG_DRM_EXYNOS_GSC),
 251                 DRM_COMPONENT_DRIVER
 252         }, {
 253                 &exynos_drm_platform_driver,
 254                 DRM_VIRTUAL_DEVICE
 255         }
 256 };
 257
 258 static int compare_dev(struct device *dev, void *data)
 259 {
 260         return dev == (struct device *)data;
 261 }
 262
 263 static struct component_match *exynos_drm_match_add(struct device *dev)
 264 {
 265         struct component_match *match = NULL;
 266         int i;
 267
 268         for (i = 0; i < ARRAY_SIZE(exynos_drm_drivers); ++i) {
 269                 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i];
 270                 struct device *p = NULL, *d;
 271
 272                 if (!info->driver || !(info->flags & DRM_COMPONENT_DRIVER))
 273                         continue;
 274
 275                 while ((d = bus_find_device(&platform_bus_type, p,
 276                                             &info->driver->driver,
 277                                             (void *)platform_bus_type.match))) {
 278                         put_device(p);
 279
 280                         if (!(info->flags & DRM_FIMC_DEVICE) ||
 281                             exynos_drm_check_fimc_device(d) == 0)
 282                                 component_match_add(dev, &match,
 283                                                     compare_dev, d);
 284                         p = d;
 285                 }
 286                 put_device(p);
 287         }
 288
 289         return match ?: ERR_PTR(-ENODEV);
 290 }
 291
 292 static struct device *exynos_drm_get_dma_device(void)
 293 {
 294         int i;
 295
 296         for (i = 0; i < ARRAY_SIZE(exynos_drm_drivers); ++i) {
 297                 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i];
 298                 struct device *dev;
 299
 300                 if (!info->driver || !(info->flags & DRM_DMA_DEVICE))
 301                         continue;
 302
 303                 while ((dev = bus_find_device(&platform_bus_type, NULL,
 304                                             &info->driver->driver,
 305                                             (void *)platform_bus_type.match))) {
 306                         put_device(dev);
 307                         return dev;
 308                 }
 309         }
 310         return NULL;
 311 }
 312
 313 static int exynos_drm_bind(struct device *dev)
 314 {
 315         struct exynos_drm_private *private;
 316         struct drm_encoder *encoder;
 317         struct drm_device *drm;
 318         unsigned int clone_mask;
 319         int cnt, ret;
 320
 321         drm = drm_dev_alloc(&exynos_drm_driver, dev);
 322         if (IS_ERR(drm))
 323                 return PTR_ERR(drm);
 324
 325         private = kzalloc(sizeof(struct exynos_drm_private), GFP_KERNEL);
 326         if (!private) {
 327                 ret = -ENOMEM;
 328                 goto err_free_drm;
 329         }
 330
 331         init_waitqueue_head(&private->wait);
 332         spin_lock_init(&private->lock);
 333
 334         dev_set_drvdata(dev, drm);
 335         drm->dev_private = (void *)private;
 336
 337         /* the first real CRTC device is used for all dma mapping operations */
 338         private->dma_dev = exynos_drm_get_dma_device();
 339         if (!private->dma_dev) {
 340                 DRM_ERROR("no device found for DMA mapping operations.\n");
 341                 ret = -ENODEV;
 342                 goto err_free_private;
 343         }
 344         DRM_INFO("Exynos DRM: using %s device for DMA mapping operations\n",
 345                  dev_name(private->dma_dev));
 346
 347         /* create common IOMMU mapping for all devices attached to Exynos DRM */
 348         ret = drm_create_iommu_mapping(drm);
 349         if (ret < 0) {
 350                 DRM_ERROR("failed to create iommu mapping.\n");
 351                 goto err_free_private;
 352         }
 353
 354         drm_mode_config_init(drm);
 355
 356         exynos_drm_mode_config_init(drm);
 357
 358         /* setup possible_clones. */
 359         cnt = 0;
 360         clone_mask = 0;
 361         list_for_each_entry(encoder, &drm->mode_config.encoder_list, head)
 362                 clone_mask |= (1 << (cnt++));
 363
 364         list_for_each_entry(encoder, &drm->mode_config.encoder_list, head)
 365                 encoder->possible_clones = clone_mask;
 366
 367         /* Try to bind all sub drivers. */
 368         ret = component_bind_all(drm->dev, drm);
 369         if (ret)
 370                 goto err_mode_config_cleanup;
 371
 372         ret = drm_vblank_init(drm, drm->mode_config.num_crtc);
 373         if (ret)
 374                 goto err_unbind_all;
 375
 376         drm_mode_config_reset(drm);
 377
 378         /*
 379          * enable drm irq mode.
 380          * - with irq_enabled = true, we can use the vblank feature.
 381          *
 382          * P.S. note that we wouldn't use drm irq handler but
 383          *      just specific driver own one instead because
 384          *      drm framework supports only one irq handler.
 385          */
 386         drm->irq_enabled = true;
 387
 388         /* init kms poll for handling hpd */
 389         drm_kms_helper_poll_init(drm);
 390
 391         ret = exynos_drm_fbdev_init(drm);
 392         if (ret)
 393                 goto err_cleanup_poll;
 394
 395         /* register the DRM device */
 396         ret = drm_dev_register(drm, 0);
 397         if (ret < 0)
 398                 goto err_cleanup_fbdev;
 399
 400         return 0;
 401
 402 err_cleanup_fbdev:
 403         exynos_drm_fbdev_fini(drm);
 404 err_cleanup_poll:
 405         drm_kms_helper_poll_fini(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_put(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_fbdev_fini(drm);
 426         drm_kms_helper_poll_fini(drm);
 427
 428         component_unbind_all(drm->dev, drm);
 429         drm_mode_config_cleanup(drm);
 430         drm_release_iommu_mapping(drm);
 431
 432         kfree(drm->dev_private);
 433         drm->dev_private = NULL;
 434         dev_set_drvdata(dev, NULL);
 435
 436         drm_dev_put(drm);
 437 }
 438
 439 static const struct component_master_ops exynos_drm_ops = {
 440         .bind           = exynos_drm_bind,
 441         .unbind         = exynos_drm_unbind,
 442 };
 443
 444 static int exynos_drm_platform_probe(struct platform_device *pdev)
 445 {
 446         struct component_match *match;
 447
 448         pdev->dev.coherent_dma_mask = DMA_BIT_MASK(32);
 449
 450         match = exynos_drm_match_add(&pdev->dev);
 451         if (IS_ERR(match))
 452                 return PTR_ERR(match);
 453
 454         return component_master_add_with_match(&pdev->dev, &exynos_drm_ops,
 455                                                match);
 456 }
 457
 458 static int exynos_drm_platform_remove(struct platform_device *pdev)
 459 {
 460         component_master_del(&pdev->dev, &exynos_drm_ops);
 461         return 0;
 462 }
 463
 464 static struct platform_driver exynos_drm_platform_driver = {
 465         .probe  = exynos_drm_platform_probe,
 466         .remove = exynos_drm_platform_remove,
 467         .driver = {
 468                 .name   = "exynos-drm",
 469                 .pm     = &exynos_drm_pm_ops,
 470         },
 471 };
 472
 473 static void exynos_drm_unregister_devices(void)
 474 {
 475         int i;
 476
 477         for (i = ARRAY_SIZE(exynos_drm_drivers) - 1; i >= 0; --i) {
 478                 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i];
 479                 struct device *dev;
 480
 481                 if (!info->driver || !(info->flags & DRM_VIRTUAL_DEVICE))
 482                         continue;
 483
 484                 while ((dev = bus_find_device(&platform_bus_type, NULL,
 485                                             &info->driver->driver,
 486                                             (void *)platform_bus_type.match))) {
 487                         put_device(dev);
 488                         platform_device_unregister(to_platform_device(dev));
 489                 }
 490         }
 491 }
 492
 493 static int exynos_drm_register_devices(void)
 494 {
 495         struct platform_device *pdev;
 496         int i;
 497
 498         for (i = 0; i < ARRAY_SIZE(exynos_drm_drivers); ++i) {
 499                 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i];
 500
 501                 if (!info->driver || !(info->flags & DRM_VIRTUAL_DEVICE))
 502                         continue;
 503
 504                 pdev = platform_device_register_simple(
 505                                         info->driver->driver.name, -1, NULL, 0);
 506                 if (IS_ERR(pdev))
 507                         goto fail;
 508         }
 509
 510         return 0;
 511 fail:
 512         exynos_drm_unregister_devices();
 513         return PTR_ERR(pdev);
 514 }
 515
 516 static void exynos_drm_unregister_drivers(void)
 517 {
 518         int i;
 519
 520         for (i = ARRAY_SIZE(exynos_drm_drivers) - 1; i >= 0; --i) {
 521                 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i];
 522
 523                 if (!info->driver)
 524                         continue;
 525
 526                 platform_driver_unregister(info->driver);
 527         }
 528 }
 529
 530 static int exynos_drm_register_drivers(void)
 531 {
 532         int i, ret;
 533
 534         for (i = 0; i < ARRAY_SIZE(exynos_drm_drivers); ++i) {
 535                 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i];
 536
 537                 if (!info->driver)
 538                         continue;
 539
 540                 ret = platform_driver_register(info->driver);
 541                 if (ret)
 542                         goto fail;
 543         }
 544         return 0;
 545 fail:
 546         exynos_drm_unregister_drivers();
 547         return ret;
 548 }
 549
 550 static int exynos_drm_init(void)
 551 {
 552         int ret;
 553
 554         ret = exynos_drm_register_devices();
 555         if (ret)
 556                 return ret;
 557
 558         ret = exynos_drm_register_drivers();
 559         if (ret)
 560                 goto err_unregister_pdevs;
 561
 562         return 0;
 563
 564 err_unregister_pdevs:
 565         exynos_drm_unregister_devices();
 566
 567         return ret;
 568 }
 569
 570 static void exynos_drm_exit(void)
 571 {
 572         exynos_drm_unregister_drivers();
 573         exynos_drm_unregister_devices();
 574 }
 575
 576 module_init(exynos_drm_init);
 577 module_exit(exynos_drm_exit);
 578
 579 MODULE_AUTHOR("Inki Dae <inki.dae@samsung.com>");
 580 MODULE_AUTHOR("Joonyoung Shim <jy0922.shim@samsung.com>");
 581 MODULE_AUTHOR("Seung-Woo Kim <sw0312.kim@samsung.com>");
 582 MODULE_DESCRIPTION("Samsung SoC DRM Driver");
 583 MODULE_LICENSE("GPL");