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_client_setup.h>
  19 #include <drm/drm_drv.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         .postclose              = exynos_drm_postclose,
 112         .dumb_create            = exynos_drm_gem_dumb_create,
 113         .gem_prime_import       = exynos_drm_gem_prime_import,
 114         .gem_prime_import_sg_table      = exynos_drm_gem_prime_import_sg_table,
 115         EXYNOS_DRM_FBDEV_DRIVER_OPS,
 116         .ioctls                 = exynos_ioctls,
 117         .num_ioctls             = ARRAY_SIZE(exynos_ioctls),
 118         .fops                   = &exynos_drm_driver_fops,
 119         .name   = DRIVER_NAME,
 120         .desc   = DRIVER_DESC,
 121         .date   = DRIVER_DATE,
 122         .major  = DRIVER_MAJOR,
 123         .minor  = DRIVER_MINOR,
 124 };
 125
 126 static int exynos_drm_suspend(struct device *dev)
 127 {
 128         struct drm_device *drm_dev = dev_get_drvdata(dev);
 129
 130         return  drm_mode_config_helper_suspend(drm_dev);
 131 }
 132
 133 static void exynos_drm_resume(struct device *dev)
 134 {
 135         struct drm_device *drm_dev = dev_get_drvdata(dev);
 136
 137         drm_mode_config_helper_resume(drm_dev);
 138 }
 139
 140 static const struct dev_pm_ops exynos_drm_pm_ops = {
 141         .prepare = exynos_drm_suspend,
 142         .complete = exynos_drm_resume,
 143 };
 144
 145 /* forward declaration */
 146 static struct platform_driver exynos_drm_platform_driver;
 147
 148 struct exynos_drm_driver_info {
 149         struct platform_driver *driver;
 150         unsigned int flags;
 151 };
 152
 153 #define DRM_COMPONENT_DRIVER    BIT(0)  /* supports component framework */
 154 #define DRM_VIRTUAL_DEVICE      BIT(1)  /* create virtual platform device */
 155 #define DRM_FIMC_DEVICE         BIT(2)  /* devices shared with V4L2 subsystem */
 156
 157 #define DRV_PTR(drv, cond) (IS_ENABLED(cond) ? &drv : NULL)
 158
 159 /*
 160  * Connector drivers should not be placed before associated crtc drivers,
 161  * because connector requires pipe number of its crtc during initialization.
 162  */
 163 static struct exynos_drm_driver_info exynos_drm_drivers[] = {
 164         {
 165                 DRV_PTR(fimd_driver, CONFIG_DRM_EXYNOS_FIMD),
 166                 DRM_COMPONENT_DRIVER
 167         }, {
 168                 DRV_PTR(exynos5433_decon_driver, CONFIG_DRM_EXYNOS5433_DECON),
 169                 DRM_COMPONENT_DRIVER
 170         }, {
 171                 DRV_PTR(decon_driver, CONFIG_DRM_EXYNOS7_DECON),
 172                 DRM_COMPONENT_DRIVER
 173         }, {
 174                 DRV_PTR(mixer_driver, CONFIG_DRM_EXYNOS_MIXER),
 175                 DRM_COMPONENT_DRIVER
 176         }, {
 177                 DRV_PTR(dp_driver, CONFIG_DRM_EXYNOS_DP),
 178                 DRM_COMPONENT_DRIVER
 179         }, {
 180                 DRV_PTR(dsi_driver, CONFIG_DRM_EXYNOS_DSI),
 181                 DRM_COMPONENT_DRIVER
 182         }, {
 183                 DRV_PTR(mic_driver, CONFIG_DRM_EXYNOS_MIC),
 184                 DRM_COMPONENT_DRIVER
 185         }, {
 186                 DRV_PTR(hdmi_driver, CONFIG_DRM_EXYNOS_HDMI),
 187                 DRM_COMPONENT_DRIVER
 188         }, {
 189                 DRV_PTR(vidi_driver, CONFIG_DRM_EXYNOS_VIDI),
 190                 DRM_COMPONENT_DRIVER | DRM_VIRTUAL_DEVICE
 191         }, {
 192                 DRV_PTR(g2d_driver, CONFIG_DRM_EXYNOS_G2D),
 193                 DRM_COMPONENT_DRIVER
 194         }, {
 195                 DRV_PTR(fimc_driver, CONFIG_DRM_EXYNOS_FIMC),
 196                 DRM_COMPONENT_DRIVER | DRM_FIMC_DEVICE,
 197         }, {
 198                 DRV_PTR(rotator_driver, CONFIG_DRM_EXYNOS_ROTATOR),
 199                 DRM_COMPONENT_DRIVER
 200         }, {
 201                 DRV_PTR(scaler_driver, CONFIG_DRM_EXYNOS_SCALER),
 202                 DRM_COMPONENT_DRIVER
 203         }, {
 204                 DRV_PTR(gsc_driver, CONFIG_DRM_EXYNOS_GSC),
 205                 DRM_COMPONENT_DRIVER
 206         }, {
 207                 &exynos_drm_platform_driver,
 208                 DRM_VIRTUAL_DEVICE
 209         }
 210 };
 211
 212 static struct component_match *exynos_drm_match_add(struct device *dev)
 213 {
 214         struct component_match *match = NULL;
 215         int i;
 216
 217         for (i = 0; i < ARRAY_SIZE(exynos_drm_drivers); ++i) {
 218                 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i];
 219                 struct device *p = NULL, *d;
 220
 221                 if (!info->driver || !(info->flags & DRM_COMPONENT_DRIVER))
 222                         continue;
 223
 224                 while ((d = platform_find_device_by_driver(p, &info->driver->driver))) {
 225                         put_device(p);
 226
 227                         if (!(info->flags & DRM_FIMC_DEVICE) ||
 228                             exynos_drm_check_fimc_device(d) == 0)
 229                                 component_match_add(dev, &match, component_compare_dev, d);
 230                         p = d;
 231                 }
 232                 put_device(p);
 233         }
 234
 235         return match ?: ERR_PTR(-ENODEV);
 236 }
 237
 238 static int exynos_drm_bind(struct device *dev)
 239 {
 240         struct exynos_drm_private *private;
 241         struct drm_encoder *encoder;
 242         struct drm_device *drm;
 243         unsigned int clone_mask;
 244         int ret;
 245
 246         drm = drm_dev_alloc(&exynos_drm_driver, dev);
 247         if (IS_ERR(drm))
 248                 return PTR_ERR(drm);
 249
 250         private = kzalloc(sizeof(struct exynos_drm_private), GFP_KERNEL);
 251         if (!private) {
 252                 ret = -ENOMEM;
 253                 goto err_free_drm;
 254         }
 255
 256         init_waitqueue_head(&private->wait);
 257         spin_lock_init(&private->lock);
 258
 259         dev_set_drvdata(dev, drm);
 260         drm->dev_private = (void *)private;
 261
 262         drm_mode_config_init(drm);
 263
 264         exynos_drm_mode_config_init(drm);
 265
 266         /* setup possible_clones. */
 267         clone_mask = 0;
 268         list_for_each_entry(encoder, &drm->mode_config.encoder_list, head)
 269                 clone_mask |= drm_encoder_mask(encoder);
 270
 271         list_for_each_entry(encoder, &drm->mode_config.encoder_list, head)
 272                 encoder->possible_clones = clone_mask;
 273
 274         /* Try to bind all sub drivers. */
 275         ret = component_bind_all(drm->dev, drm);
 276         if (ret)
 277                 goto err_mode_config_cleanup;
 278
 279         ret = drm_vblank_init(drm, drm->mode_config.num_crtc);
 280         if (ret)
 281                 goto err_unbind_all;
 282
 283         drm_mode_config_reset(drm);
 284
 285         /* init kms poll for handling hpd */
 286         drm_kms_helper_poll_init(drm);
 287
 288         /* register the DRM device */
 289         ret = drm_dev_register(drm, 0);
 290         if (ret < 0)
 291                 goto err_cleanup_poll;
 292
 293         drm_client_setup(drm, NULL);
 294
 295         return 0;
 296
 297 err_cleanup_poll:
 298         drm_kms_helper_poll_fini(drm);
 299 err_unbind_all:
 300         component_unbind_all(drm->dev, drm);
 301 err_mode_config_cleanup:
 302         drm_mode_config_cleanup(drm);
 303         exynos_drm_cleanup_dma(drm);
 304         kfree(private);
 305         dev_set_drvdata(dev, NULL);
 306 err_free_drm:
 307         drm_dev_put(drm);
 308
 309         return ret;
 310 }
 311
 312 static void exynos_drm_unbind(struct device *dev)
 313 {
 314         struct drm_device *drm = dev_get_drvdata(dev);
 315
 316         drm_dev_unregister(drm);
 317
 318         drm_kms_helper_poll_fini(drm);
 319         drm_atomic_helper_shutdown(drm);
 320
 321         component_unbind_all(drm->dev, drm);
 322         drm_mode_config_cleanup(drm);
 323         exynos_drm_cleanup_dma(drm);
 324
 325         kfree(drm->dev_private);
 326         drm->dev_private = NULL;
 327         dev_set_drvdata(dev, NULL);
 328
 329         drm_dev_put(drm);
 330 }
 331
 332 static const struct component_master_ops exynos_drm_ops = {
 333         .bind           = exynos_drm_bind,
 334         .unbind         = exynos_drm_unbind,
 335 };
 336
 337 static int exynos_drm_platform_probe(struct platform_device *pdev)
 338 {
 339         struct component_match *match;
 340
 341         pdev->dev.coherent_dma_mask = DMA_BIT_MASK(32);
 342
 343         match = exynos_drm_match_add(&pdev->dev);
 344         if (IS_ERR(match))
 345                 return PTR_ERR(match);
 346
 347         return component_master_add_with_match(&pdev->dev, &exynos_drm_ops,
 348                                                match);
 349 }
 350
 351 static void exynos_drm_platform_remove(struct platform_device *pdev)
 352 {
 353         component_master_del(&pdev->dev, &exynos_drm_ops);
 354 }
 355
 356 static void exynos_drm_platform_shutdown(struct platform_device *pdev)
 357 {
 358         struct drm_device *drm = platform_get_drvdata(pdev);
 359
 360         if (drm)
 361                 drm_atomic_helper_shutdown(drm);
 362 }
 363
 364 static struct platform_driver exynos_drm_platform_driver = {
 365         .probe  = exynos_drm_platform_probe,
 366         .remove         = exynos_drm_platform_remove,
 367         .shutdown = exynos_drm_platform_shutdown,
 368         .driver = {
 369                 .name   = "exynos-drm",
 370                 .pm     = &exynos_drm_pm_ops,
 371         },
 372 };
 373
 374 static void exynos_drm_unregister_devices(void)
 375 {
 376         int i;
 377
 378         for (i = ARRAY_SIZE(exynos_drm_drivers) - 1; i >= 0; --i) {
 379                 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i];
 380                 struct device *dev;
 381
 382                 if (!info->driver || !(info->flags & DRM_VIRTUAL_DEVICE))
 383                         continue;
 384
 385                 while ((dev = platform_find_device_by_driver(NULL,
 386                                                 &info->driver->driver))) {
 387                         put_device(dev);
 388                         platform_device_unregister(to_platform_device(dev));
 389                 }
 390         }
 391 }
 392
 393 static int exynos_drm_register_devices(void)
 394 {
 395         struct platform_device *pdev;
 396         int i;
 397
 398         for (i = 0; i < ARRAY_SIZE(exynos_drm_drivers); ++i) {
 399                 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i];
 400
 401                 if (!info->driver || !(info->flags & DRM_VIRTUAL_DEVICE))
 402                         continue;
 403
 404                 pdev = platform_device_register_simple(
 405                                         info->driver->driver.name, -1, NULL, 0);
 406                 if (IS_ERR(pdev))
 407                         goto fail;
 408         }
 409
 410         return 0;
 411 fail:
 412         exynos_drm_unregister_devices();
 413         return PTR_ERR(pdev);
 414 }
 415
 416 static void exynos_drm_unregister_drivers(void)
 417 {
 418         int i;
 419
 420         for (i = ARRAY_SIZE(exynos_drm_drivers) - 1; i >= 0; --i) {
 421                 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i];
 422
 423                 if (!info->driver)
 424                         continue;
 425
 426                 platform_driver_unregister(info->driver);
 427         }
 428 }
 429
 430 static int exynos_drm_register_drivers(void)
 431 {
 432         int i, ret;
 433
 434         for (i = 0; i < ARRAY_SIZE(exynos_drm_drivers); ++i) {
 435                 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i];
 436
 437                 if (!info->driver)
 438                         continue;
 439
 440                 ret = platform_driver_register(info->driver);
 441                 if (ret)
 442                         goto fail;
 443         }
 444         return 0;
 445 fail:
 446         exynos_drm_unregister_drivers();
 447         return ret;
 448 }
 449
 450 static int exynos_drm_init(void)
 451 {
 452         int ret;
 453
 454         if (drm_firmware_drivers_only())
 455                 return -ENODEV;
 456
 457         ret = exynos_drm_register_devices();
 458         if (ret)
 459                 return ret;
 460
 461         ret = exynos_drm_register_drivers();
 462         if (ret)
 463                 goto err_unregister_pdevs;
 464
 465         return 0;
 466
 467 err_unregister_pdevs:
 468         exynos_drm_unregister_devices();
 469
 470         return ret;
 471 }
 472
 473 static void exynos_drm_exit(void)
 474 {
 475         exynos_drm_unregister_drivers();
 476         exynos_drm_unregister_devices();
 477 }
 478
 479 module_init(exynos_drm_init);
 480 module_exit(exynos_drm_exit);
 481
 482 MODULE_AUTHOR("Inki Dae <inki.dae@samsung.com>");
 483 MODULE_AUTHOR("Joonyoung Shim <jy0922.shim@samsung.com>");
 484 MODULE_AUTHOR("Seung-Woo Kim <sw0312.kim@samsung.com>");
 485 MODULE_DESCRIPTION("Samsung SoC DRM Driver");
 486 MODULE_LICENSE("GPL");