drivers/gpu/drm/exynos/exynos_drm_drv.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * Copyright (c) 2011 Samsung Electronics Co., Ltd.
   4  * Authors:
   5  *      Inki Dae <inki.dae@samsung.com>
   6  *      Joonyoung Shim <jy0922.shim@samsung.com>
   7  *      Seung-Woo Kim <sw0312.kim@samsung.com>
   8  */
   9
  10 #include <linux/component.h>
  11 #include <linux/dma-mapping.h>
  12 #include <linux/platform_device.h>
  13 #include <linux/pm_runtime.h>
  14 #include <linux/uaccess.h>
  15
  16 #include <drm/drm_atomic.h>
  17 #include <drm/drm_atomic_helper.h>
  18 #include <drm/drm_drv.h>
  19 #include <drm/drm_fb_helper.h>
  20 #include <drm/drm_file.h>
  21 #include <drm/drm_fourcc.h>
  22 #include <drm/drm_ioctl.h>
  23 #include <drm/drm_probe_helper.h>
  24 #include <drm/drm_vblank.h>
  25 #include <drm/exynos_drm.h>
  26
  27 #include "exynos_drm_drv.h"
  28 #include "exynos_drm_fb.h"
  29 #include "exynos_drm_fbdev.h"
  30 #include "exynos_drm_g2d.h"
  31 #include "exynos_drm_gem.h"
  32 #include "exynos_drm_ipp.h"
  33 #include "exynos_drm_plane.h"
  34 #include "exynos_drm_vidi.h"
  35
  36 #define DRIVER_NAME     "exynos"
  37 #define DRIVER_DESC     "Samsung SoC DRM"
  38 #define DRIVER_DATE     "20180330"
  39
  40 /*
  41  * Interface history:
  42  *
  43  * 1.0 - Original version
  44  * 1.1 - Upgrade IPP driver to version 2.0
  45  */
  46 #define DRIVER_MAJOR    1
  47 #define DRIVER_MINOR    1
  48
  49 static int exynos_drm_open(struct drm_device *dev, struct drm_file *file)
  50 {
  51         struct drm_exynos_file_private *file_priv;
  52         int ret;
  53
  54         file_priv = kzalloc(sizeof(*file_priv), GFP_KERNEL);
  55         if (!file_priv)
  56                 return -ENOMEM;
  57
  58         file->driver_priv = file_priv;
  59         ret = g2d_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         g2d_close(dev, file);
  74         kfree(file->driver_priv);
  75         file->driver_priv = NULL;
  76 }
  77
  78 static const struct drm_ioctl_desc exynos_ioctls[] = {
  79         DRM_IOCTL_DEF_DRV(EXYNOS_GEM_CREATE, exynos_drm_gem_create_ioctl,
  80                         DRM_RENDER_ALLOW),
  81         DRM_IOCTL_DEF_DRV(EXYNOS_GEM_MAP, exynos_drm_gem_map_ioctl,
  82                         DRM_RENDER_ALLOW),
  83         DRM_IOCTL_DEF_DRV(EXYNOS_GEM_GET, exynos_drm_gem_get_ioctl,
  84                         DRM_RENDER_ALLOW),
  85         DRM_IOCTL_DEF_DRV(EXYNOS_VIDI_CONNECTION, vidi_connection_ioctl,
  86                         DRM_AUTH),
  87         DRM_IOCTL_DEF_DRV(EXYNOS_G2D_GET_VER, exynos_g2d_get_ver_ioctl,
  88                         DRM_RENDER_ALLOW),
  89         DRM_IOCTL_DEF_DRV(EXYNOS_G2D_SET_CMDLIST, exynos_g2d_set_cmdlist_ioctl,
  90                         DRM_RENDER_ALLOW),
  91         DRM_IOCTL_DEF_DRV(EXYNOS_G2D_EXEC, exynos_g2d_exec_ioctl,
  92                         DRM_RENDER_ALLOW),
  93         DRM_IOCTL_DEF_DRV(EXYNOS_IPP_GET_RESOURCES,
  94                         exynos_drm_ipp_get_res_ioctl,
  95                         DRM_RENDER_ALLOW),
  96         DRM_IOCTL_DEF_DRV(EXYNOS_IPP_GET_CAPS, exynos_drm_ipp_get_caps_ioctl,
  97                         DRM_RENDER_ALLOW),
  98         DRM_IOCTL_DEF_DRV(EXYNOS_IPP_GET_LIMITS,
  99                         exynos_drm_ipp_get_limits_ioctl,
 100                         DRM_RENDER_ALLOW),
 101         DRM_IOCTL_DEF_DRV(EXYNOS_IPP_COMMIT, exynos_drm_ipp_commit_ioctl,
 102                         DRM_RENDER_ALLOW),
 103 };
 104
 105 DEFINE_DRM_GEM_FOPS(exynos_drm_driver_fops);
 106
 107 static const struct drm_driver exynos_drm_driver = {
 108         .driver_features        = DRIVER_MODESET | DRIVER_GEM
 109                                   | DRIVER_ATOMIC | DRIVER_RENDER,
 110         .open                   = exynos_drm_open,
 111         .lastclose              = drm_fb_helper_lastclose,
 112         .postclose              = exynos_drm_postclose,
 113         .dumb_create            = exynos_drm_gem_dumb_create,
 114         .prime_handle_to_fd     = drm_gem_prime_handle_to_fd,
 115         .prime_fd_to_handle     = drm_gem_prime_fd_to_handle,
 116         .gem_prime_import       = exynos_drm_gem_prime_import,
 117         .gem_prime_import_sg_table      = exynos_drm_gem_prime_import_sg_table,
 118         .gem_prime_mmap         = drm_gem_prime_mmap,
 119         .ioctls                 = exynos_ioctls,
 120         .num_ioctls             = ARRAY_SIZE(exynos_ioctls),
 121         .fops                   = &exynos_drm_driver_fops,
 122         .name   = DRIVER_NAME,
 123         .desc   = DRIVER_DESC,
 124         .date   = DRIVER_DATE,
 125         .major  = DRIVER_MAJOR,
 126         .minor  = DRIVER_MINOR,
 127 };
 128
 129 static int exynos_drm_suspend(struct device *dev)
 130 {
 131         struct drm_device *drm_dev = dev_get_drvdata(dev);
 132
 133         return  drm_mode_config_helper_suspend(drm_dev);
 134 }
 135
 136 static void exynos_drm_resume(struct device *dev)
 137 {
 138         struct drm_device *drm_dev = dev_get_drvdata(dev);
 139
 140         drm_mode_config_helper_resume(drm_dev);
 141 }
 142
 143 static const struct dev_pm_ops exynos_drm_pm_ops = {
 144         .prepare = exynos_drm_suspend,
 145         .complete = exynos_drm_resume,
 146 };
 147
 148 /* forward declaration */
 149 static struct platform_driver exynos_drm_platform_driver;
 150
 151 struct exynos_drm_driver_info {
 152         struct platform_driver *driver;
 153         unsigned int flags;
 154 };
 155
 156 #define DRM_COMPONENT_DRIVER    BIT(0)  /* supports component framework */
 157 #define DRM_VIRTUAL_DEVICE      BIT(1)  /* create virtual platform device */
 158 #define DRM_FIMC_DEVICE         BIT(2)  /* devices shared with V4L2 subsystem */
 159
 160 #define DRV_PTR(drv, cond) (IS_ENABLED(cond) ? &drv : NULL)
 161
 162 /*
 163  * Connector drivers should not be placed before associated crtc drivers,
 164  * because connector requires pipe number of its crtc during initialization.
 165  */
 166 static struct exynos_drm_driver_info exynos_drm_drivers[] = {
 167         {
 168                 DRV_PTR(fimd_driver, CONFIG_DRM_EXYNOS_FIMD),
 169                 DRM_COMPONENT_DRIVER
 170         }, {
 171                 DRV_PTR(exynos5433_decon_driver, CONFIG_DRM_EXYNOS5433_DECON),
 172                 DRM_COMPONENT_DRIVER
 173         }, {
 174                 DRV_PTR(decon_driver, CONFIG_DRM_EXYNOS7_DECON),
 175                 DRM_COMPONENT_DRIVER
 176         }, {
 177                 DRV_PTR(mixer_driver, CONFIG_DRM_EXYNOS_MIXER),
 178                 DRM_COMPONENT_DRIVER
 179         }, {
 180                 DRV_PTR(mic_driver, CONFIG_DRM_EXYNOS_MIC),
 181                 DRM_COMPONENT_DRIVER
 182         }, {
 183                 DRV_PTR(dp_driver, CONFIG_DRM_EXYNOS_DP),
 184                 DRM_COMPONENT_DRIVER
 185         }, {
 186                 DRV_PTR(dsi_driver, CONFIG_DRM_EXYNOS_DSI),
 187                 DRM_COMPONENT_DRIVER
 188         }, {
 189                 DRV_PTR(hdmi_driver, CONFIG_DRM_EXYNOS_HDMI),
 190                 DRM_COMPONENT_DRIVER
 191         }, {
 192                 DRV_PTR(vidi_driver, CONFIG_DRM_EXYNOS_VIDI),
 193                 DRM_COMPONENT_DRIVER | DRM_VIRTUAL_DEVICE
 194         }, {
 195                 DRV_PTR(g2d_driver, CONFIG_DRM_EXYNOS_G2D),
 196                 DRM_COMPONENT_DRIVER
 197         }, {
 198                 DRV_PTR(fimc_driver, CONFIG_DRM_EXYNOS_FIMC),
 199                 DRM_COMPONENT_DRIVER | DRM_FIMC_DEVICE,
 200         }, {
 201                 DRV_PTR(rotator_driver, CONFIG_DRM_EXYNOS_ROTATOR),
 202                 DRM_COMPONENT_DRIVER
 203         }, {
 204                 DRV_PTR(scaler_driver, CONFIG_DRM_EXYNOS_SCALER),
 205                 DRM_COMPONENT_DRIVER
 206         }, {
 207                 DRV_PTR(gsc_driver, CONFIG_DRM_EXYNOS_GSC),
 208                 DRM_COMPONENT_DRIVER
 209         }, {
 210                 &exynos_drm_platform_driver,
 211                 DRM_VIRTUAL_DEVICE
 212         }
 213 };
 214
 215 static struct component_match *exynos_drm_match_add(struct device *dev)
 216 {
 217         struct component_match *match = NULL;
 218         int i;
 219
 220         for (i = 0; i < ARRAY_SIZE(exynos_drm_drivers); ++i) {
 221                 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i];
 222                 struct device *p = NULL, *d;
 223
 224                 if (!info->driver || !(info->flags & DRM_COMPONENT_DRIVER))
 225                         continue;
 226
 227                 while ((d = platform_find_device_by_driver(p, &info->driver->driver))) {
 228                         put_device(p);
 229
 230                         if (!(info->flags & DRM_FIMC_DEVICE) ||
 231                             exynos_drm_check_fimc_device(d) == 0)
 232                                 component_match_add(dev, &match, component_compare_dev, d);
 233                         p = d;
 234                 }
 235                 put_device(p);
 236         }
 237
 238         return match ?: ERR_PTR(-ENODEV);
 239 }
 240
 241 static int exynos_drm_bind(struct device *dev)
 242 {
 243         struct exynos_drm_private *private;
 244         struct drm_encoder *encoder;
 245         struct drm_device *drm;
 246         unsigned int clone_mask;
 247         int ret;
 248
 249         drm = drm_dev_alloc(&exynos_drm_driver, dev);
 250         if (IS_ERR(drm))
 251                 return PTR_ERR(drm);
 252
 253         private = kzalloc(sizeof(struct exynos_drm_private), GFP_KERNEL);
 254         if (!private) {
 255                 ret = -ENOMEM;
 256                 goto err_free_drm;
 257         }
 258
 259         init_waitqueue_head(&private->wait);
 260         spin_lock_init(&private->lock);
 261
 262         dev_set_drvdata(dev, drm);
 263         drm->dev_private = (void *)private;
 264
 265         drm_mode_config_init(drm);
 266
 267         exynos_drm_mode_config_init(drm);
 268
 269         /* setup possible_clones. */
 270         clone_mask = 0;
 271         list_for_each_entry(encoder, &drm->mode_config.encoder_list, head)
 272                 clone_mask |= drm_encoder_mask(encoder);
 273
 274         list_for_each_entry(encoder, &drm->mode_config.encoder_list, head)
 275                 encoder->possible_clones = clone_mask;
 276
 277         /* Try to bind all sub drivers. */
 278         ret = component_bind_all(drm->dev, drm);
 279         if (ret)
 280                 goto err_mode_config_cleanup;
 281
 282         ret = drm_vblank_init(drm, drm->mode_config.num_crtc);
 283         if (ret)
 284                 goto err_unbind_all;
 285
 286         drm_mode_config_reset(drm);
 287
 288         /* init kms poll for handling hpd */
 289         drm_kms_helper_poll_init(drm);
 290
 291         ret = exynos_drm_fbdev_init(drm);
 292         if (ret)
 293                 goto err_cleanup_poll;
 294
 295         /* register the DRM device */
 296         ret = drm_dev_register(drm, 0);
 297         if (ret < 0)
 298                 goto err_cleanup_fbdev;
 299
 300         return 0;
 301
 302 err_cleanup_fbdev:
 303         exynos_drm_fbdev_fini(drm);
 304 err_cleanup_poll:
 305         drm_kms_helper_poll_fini(drm);
 306 err_unbind_all:
 307         component_unbind_all(drm->dev, drm);
 308 err_mode_config_cleanup:
 309         drm_mode_config_cleanup(drm);
 310         exynos_drm_cleanup_dma(drm);
 311         kfree(private);
 312 err_free_drm:
 313         drm_dev_put(drm);
 314
 315         return ret;
 316 }
 317
 318 static void exynos_drm_unbind(struct device *dev)
 319 {
 320         struct drm_device *drm = dev_get_drvdata(dev);
 321
 322         drm_dev_unregister(drm);
 323
 324         exynos_drm_fbdev_fini(drm);
 325         drm_kms_helper_poll_fini(drm);
 326
 327         component_unbind_all(drm->dev, drm);
 328         drm_mode_config_cleanup(drm);
 329         exynos_drm_cleanup_dma(drm);
 330
 331         kfree(drm->dev_private);
 332         drm->dev_private = NULL;
 333         dev_set_drvdata(dev, NULL);
 334
 335         drm_dev_put(drm);
 336 }
 337
 338 static const struct component_master_ops exynos_drm_ops = {
 339         .bind           = exynos_drm_bind,
 340         .unbind         = exynos_drm_unbind,
 341 };
 342
 343 static int exynos_drm_platform_probe(struct platform_device *pdev)
 344 {
 345         struct component_match *match;
 346
 347         pdev->dev.coherent_dma_mask = DMA_BIT_MASK(32);
 348
 349         match = exynos_drm_match_add(&pdev->dev);
 350         if (IS_ERR(match))
 351                 return PTR_ERR(match);
 352
 353         return component_master_add_with_match(&pdev->dev, &exynos_drm_ops,
 354                                                match);
 355 }
 356
 357 static int exynos_drm_platform_remove(struct platform_device *pdev)
 358 {
 359         component_master_del(&pdev->dev, &exynos_drm_ops);
 360         return 0;
 361 }
 362
 363 static struct platform_driver exynos_drm_platform_driver = {
 364         .probe  = exynos_drm_platform_probe,
 365         .remove = exynos_drm_platform_remove,
 366         .driver = {
 367                 .name   = "exynos-drm",
 368                 .pm     = &exynos_drm_pm_ops,
 369         },
 370 };
 371
 372 static void exynos_drm_unregister_devices(void)
 373 {
 374         int i;
 375
 376         for (i = ARRAY_SIZE(exynos_drm_drivers) - 1; i >= 0; --i) {
 377                 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i];
 378                 struct device *dev;
 379
 380                 if (!info->driver || !(info->flags & DRM_VIRTUAL_DEVICE))
 381                         continue;
 382
 383                 while ((dev = platform_find_device_by_driver(NULL,
 384                                                 &info->driver->driver))) {
 385                         put_device(dev);
 386                         platform_device_unregister(to_platform_device(dev));
 387                 }
 388         }
 389 }
 390
 391 static int exynos_drm_register_devices(void)
 392 {
 393         struct platform_device *pdev;
 394         int i;
 395
 396         for (i = 0; i < ARRAY_SIZE(exynos_drm_drivers); ++i) {
 397                 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i];
 398
 399                 if (!info->driver || !(info->flags & DRM_VIRTUAL_DEVICE))
 400                         continue;
 401
 402                 pdev = platform_device_register_simple(
 403                                         info->driver->driver.name, -1, NULL, 0);
 404                 if (IS_ERR(pdev))
 405                         goto fail;
 406         }
 407
 408         return 0;
 409 fail:
 410         exynos_drm_unregister_devices();
 411         return PTR_ERR(pdev);
 412 }
 413
 414 static void exynos_drm_unregister_drivers(void)
 415 {
 416         int i;
 417
 418         for (i = ARRAY_SIZE(exynos_drm_drivers) - 1; i >= 0; --i) {
 419                 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i];
 420
 421                 if (!info->driver)
 422                         continue;
 423
 424                 platform_driver_unregister(info->driver);
 425         }
 426 }
 427
 428 static int exynos_drm_register_drivers(void)
 429 {
 430         int i, ret;
 431
 432         for (i = 0; i < ARRAY_SIZE(exynos_drm_drivers); ++i) {
 433                 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i];
 434
 435                 if (!info->driver)
 436                         continue;
 437
 438                 ret = platform_driver_register(info->driver);
 439                 if (ret)
 440                         goto fail;
 441         }
 442         return 0;
 443 fail:
 444         exynos_drm_unregister_drivers();
 445         return ret;
 446 }
 447
 448 static int exynos_drm_init(void)
 449 {
 450         int ret;
 451
 452         if (drm_firmware_drivers_only())
 453                 return -ENODEV;
 454
 455         ret = exynos_drm_register_devices();
 456         if (ret)
 457                 return ret;
 458
 459         ret = exynos_drm_register_drivers();
 460         if (ret)
 461                 goto err_unregister_pdevs;
 462
 463         return 0;
 464
 465 err_unregister_pdevs:
 466         exynos_drm_unregister_devices();
 467
 468         return ret;
 469 }
 470
 471 static void exynos_drm_exit(void)
 472 {
 473         exynos_drm_unregister_drivers();
 474         exynos_drm_unregister_devices();
 475 }
 476
 477 module_init(exynos_drm_init);
 478 module_exit(exynos_drm_exit);
 479
 480 MODULE_AUTHOR("Inki Dae <inki.dae@samsung.com>");
 481 MODULE_AUTHOR("Joonyoung Shim <jy0922.shim@samsung.com>");
 482 MODULE_AUTHOR("Seung-Woo Kim <sw0312.kim@samsung.com>");
 483 MODULE_DESCRIPTION("Samsung SoC DRM Driver");
 484 MODULE_LICENSE("GPL");