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 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_RENDER_ALLOW),
  87         DRM_IOCTL_DEF_DRV(EXYNOS_GEM_MAP, exynos_drm_gem_map_ioctl,
  88                         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_RENDER_ALLOW),
  95         DRM_IOCTL_DEF_DRV(EXYNOS_G2D_SET_CMDLIST, exynos_g2d_set_cmdlist_ioctl,
  96                         DRM_RENDER_ALLOW),
  97         DRM_IOCTL_DEF_DRV(EXYNOS_G2D_EXEC, exynos_g2d_exec_ioctl,
  98                         DRM_RENDER_ALLOW),
  99         DRM_IOCTL_DEF_DRV(EXYNOS_IPP_GET_RESOURCES,
 100                         exynos_drm_ipp_get_res_ioctl,
 101                         DRM_RENDER_ALLOW),
 102         DRM_IOCTL_DEF_DRV(EXYNOS_IPP_GET_CAPS, exynos_drm_ipp_get_caps_ioctl,
 103                         DRM_RENDER_ALLOW),
 104         DRM_IOCTL_DEF_DRV(EXYNOS_IPP_GET_LIMITS,
 105                         exynos_drm_ipp_get_limits_ioctl,
 106                         DRM_RENDER_ALLOW),
 107         DRM_IOCTL_DEF_DRV(EXYNOS_IPP_COMMIT, exynos_drm_ipp_commit_ioctl,
 108                         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
 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_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
 153         return  drm_mode_config_helper_suspend(drm_dev);
 154 }
 155
 156 static void exynos_drm_resume(struct device *dev)
 157 {
 158         struct drm_device *drm_dev = dev_get_drvdata(dev);
 159
 160         drm_mode_config_helper_resume(drm_dev);
 161 }
 162
 163 static const struct dev_pm_ops exynos_drm_pm_ops = {
 164         .prepare = exynos_drm_suspend,
 165         .complete = exynos_drm_resume,
 166 };
 167
 168 /* forward declaration */
 169 static struct platform_driver exynos_drm_platform_driver;
 170
 171 struct exynos_drm_driver_info {
 172         struct platform_driver *driver;
 173         unsigned int flags;
 174 };
 175
 176 #define DRM_COMPONENT_DRIVER    BIT(0)  /* supports component framework */
 177 #define DRM_VIRTUAL_DEVICE      BIT(1)  /* create virtual platform device */
 178 #define DRM_FIMC_DEVICE         BIT(2)  /* devices shared with V4L2 subsystem */
 179
 180 #define DRV_PTR(drv, cond) (IS_ENABLED(cond) ? &drv : NULL)
 181
 182 /*
 183  * Connector drivers should not be placed before associated crtc drivers,
 184  * because connector requires pipe number of its crtc during initialization.
 185  */
 186 static struct exynos_drm_driver_info exynos_drm_drivers[] = {
 187         {
 188                 DRV_PTR(fimd_driver, CONFIG_DRM_EXYNOS_FIMD),
 189                 DRM_COMPONENT_DRIVER
 190         }, {
 191                 DRV_PTR(exynos5433_decon_driver, CONFIG_DRM_EXYNOS5433_DECON),
 192                 DRM_COMPONENT_DRIVER
 193         }, {
 194                 DRV_PTR(decon_driver, CONFIG_DRM_EXYNOS7_DECON),
 195                 DRM_COMPONENT_DRIVER
 196         }, {
 197                 DRV_PTR(mixer_driver, CONFIG_DRM_EXYNOS_MIXER),
 198                 DRM_COMPONENT_DRIVER
 199         }, {
 200                 DRV_PTR(mic_driver, CONFIG_DRM_EXYNOS_MIC),
 201                 DRM_COMPONENT_DRIVER
 202         }, {
 203                 DRV_PTR(dp_driver, CONFIG_DRM_EXYNOS_DP),
 204                 DRM_COMPONENT_DRIVER
 205         }, {
 206                 DRV_PTR(dsi_driver, CONFIG_DRM_EXYNOS_DSI),
 207                 DRM_COMPONENT_DRIVER
 208         }, {
 209                 DRV_PTR(hdmi_driver, CONFIG_DRM_EXYNOS_HDMI),
 210                 DRM_COMPONENT_DRIVER
 211         }, {
 212                 DRV_PTR(vidi_driver, CONFIG_DRM_EXYNOS_VIDI),
 213                 DRM_COMPONENT_DRIVER | DRM_VIRTUAL_DEVICE
 214         }, {
 215                 DRV_PTR(g2d_driver, CONFIG_DRM_EXYNOS_G2D),
 216                 DRM_COMPONENT_DRIVER
 217         }, {
 218                 DRV_PTR(fimc_driver, CONFIG_DRM_EXYNOS_FIMC),
 219                 DRM_COMPONENT_DRIVER | DRM_FIMC_DEVICE,
 220         }, {
 221                 DRV_PTR(rotator_driver, CONFIG_DRM_EXYNOS_ROTATOR),
 222                 DRM_COMPONENT_DRIVER
 223         }, {
 224                 DRV_PTR(scaler_driver, CONFIG_DRM_EXYNOS_SCALER),
 225                 DRM_COMPONENT_DRIVER
 226         }, {
 227                 DRV_PTR(gsc_driver, CONFIG_DRM_EXYNOS_GSC),
 228                 DRM_COMPONENT_DRIVER
 229         }, {
 230                 &exynos_drm_platform_driver,
 231                 DRM_VIRTUAL_DEVICE
 232         }
 233 };
 234
 235 static int compare_dev(struct device *dev, void *data)
 236 {
 237         return dev == (struct device *)data;
 238 }
 239
 240 static struct component_match *exynos_drm_match_add(struct device *dev)
 241 {
 242         struct component_match *match = NULL;
 243         int i;
 244
 245         for (i = 0; i < ARRAY_SIZE(exynos_drm_drivers); ++i) {
 246                 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i];
 247                 struct device *p = NULL, *d;
 248
 249                 if (!info->driver || !(info->flags & DRM_COMPONENT_DRIVER))
 250                         continue;
 251
 252                 while ((d = platform_find_device_by_driver(p, &info->driver->driver))) {
 253                         put_device(p);
 254
 255                         if (!(info->flags & DRM_FIMC_DEVICE) ||
 256                             exynos_drm_check_fimc_device(d) == 0)
 257                                 component_match_add(dev, &match,
 258                                                     compare_dev, d);
 259                         p = d;
 260                 }
 261                 put_device(p);
 262         }
 263
 264         return match ?: ERR_PTR(-ENODEV);
 265 }
 266
 267 static int exynos_drm_bind(struct device *dev)
 268 {
 269         struct exynos_drm_private *private;
 270         struct drm_encoder *encoder;
 271         struct drm_device *drm;
 272         unsigned int clone_mask;
 273         int cnt, ret;
 274
 275         drm = drm_dev_alloc(&exynos_drm_driver, dev);
 276         if (IS_ERR(drm))
 277                 return PTR_ERR(drm);
 278
 279         private = kzalloc(sizeof(struct exynos_drm_private), GFP_KERNEL);
 280         if (!private) {
 281                 ret = -ENOMEM;
 282                 goto err_free_drm;
 283         }
 284
 285         init_waitqueue_head(&private->wait);
 286         spin_lock_init(&private->lock);
 287
 288         dev_set_drvdata(dev, drm);
 289         drm->dev_private = (void *)private;
 290
 291         drm_mode_config_init(drm);
 292
 293         exynos_drm_mode_config_init(drm);
 294
 295         /* setup possible_clones. */
 296         cnt = 0;
 297         clone_mask = 0;
 298         list_for_each_entry(encoder, &drm->mode_config.encoder_list, head)
 299                 clone_mask |= (1 << (cnt++));
 300
 301         list_for_each_entry(encoder, &drm->mode_config.encoder_list, head)
 302                 encoder->possible_clones = clone_mask;
 303
 304         /* Try to bind all sub drivers. */
 305         ret = component_bind_all(drm->dev, drm);
 306         if (ret)
 307                 goto err_mode_config_cleanup;
 308
 309         ret = drm_vblank_init(drm, drm->mode_config.num_crtc);
 310         if (ret)
 311                 goto err_unbind_all;
 312
 313         drm_mode_config_reset(drm);
 314
 315         /*
 316          * enable drm irq mode.
 317          * - with irq_enabled = true, we can use the vblank feature.
 318          *
 319          * P.S. note that we wouldn't use drm irq handler but
 320          *      just specific driver own one instead because
 321          *      drm framework supports only one irq handler.
 322          */
 323         drm->irq_enabled = true;
 324
 325         /* init kms poll for handling hpd */
 326         drm_kms_helper_poll_init(drm);
 327
 328         ret = exynos_drm_fbdev_init(drm);
 329         if (ret)
 330                 goto err_cleanup_poll;
 331
 332         /* register the DRM device */
 333         ret = drm_dev_register(drm, 0);
 334         if (ret < 0)
 335                 goto err_cleanup_fbdev;
 336
 337         return 0;
 338
 339 err_cleanup_fbdev:
 340         exynos_drm_fbdev_fini(drm);
 341 err_cleanup_poll:
 342         drm_kms_helper_poll_fini(drm);
 343 err_unbind_all:
 344         component_unbind_all(drm->dev, drm);
 345 err_mode_config_cleanup:
 346         drm_mode_config_cleanup(drm);
 347         exynos_drm_cleanup_dma(drm);
 348         kfree(private);
 349 err_free_drm:
 350         drm_dev_put(drm);
 351
 352         return ret;
 353 }
 354
 355 static void exynos_drm_unbind(struct device *dev)
 356 {
 357         struct drm_device *drm = dev_get_drvdata(dev);
 358
 359         drm_dev_unregister(drm);
 360
 361         exynos_drm_fbdev_fini(drm);
 362         drm_kms_helper_poll_fini(drm);
 363
 364         component_unbind_all(drm->dev, drm);
 365         drm_mode_config_cleanup(drm);
 366         exynos_drm_cleanup_dma(drm);
 367
 368         kfree(drm->dev_private);
 369         drm->dev_private = NULL;
 370         dev_set_drvdata(dev, NULL);
 371
 372         drm_dev_put(drm);
 373 }
 374
 375 static const struct component_master_ops exynos_drm_ops = {
 376         .bind           = exynos_drm_bind,
 377         .unbind         = exynos_drm_unbind,
 378 };
 379
 380 static int exynos_drm_platform_probe(struct platform_device *pdev)
 381 {
 382         struct component_match *match;
 383
 384         pdev->dev.coherent_dma_mask = DMA_BIT_MASK(32);
 385
 386         match = exynos_drm_match_add(&pdev->dev);
 387         if (IS_ERR(match))
 388                 return PTR_ERR(match);
 389
 390         return component_master_add_with_match(&pdev->dev, &exynos_drm_ops,
 391                                                match);
 392 }
 393
 394 static int exynos_drm_platform_remove(struct platform_device *pdev)
 395 {
 396         component_master_del(&pdev->dev, &exynos_drm_ops);
 397         return 0;
 398 }
 399
 400 static struct platform_driver exynos_drm_platform_driver = {
 401         .probe  = exynos_drm_platform_probe,
 402         .remove = exynos_drm_platform_remove,
 403         .driver = {
 404                 .name   = "exynos-drm",
 405                 .pm     = &exynos_drm_pm_ops,
 406         },
 407 };
 408
 409 static void exynos_drm_unregister_devices(void)
 410 {
 411         int i;
 412
 413         for (i = ARRAY_SIZE(exynos_drm_drivers) - 1; i >= 0; --i) {
 414                 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i];
 415                 struct device *dev;
 416
 417                 if (!info->driver || !(info->flags & DRM_VIRTUAL_DEVICE))
 418                         continue;
 419
 420                 while ((dev = platform_find_device_by_driver(NULL,
 421                                                 &info->driver->driver))) {
 422                         put_device(dev);
 423                         platform_device_unregister(to_platform_device(dev));
 424                 }
 425         }
 426 }
 427
 428 static int exynos_drm_register_devices(void)
 429 {
 430         struct platform_device *pdev;
 431         int i;
 432
 433         for (i = 0; i < ARRAY_SIZE(exynos_drm_drivers); ++i) {
 434                 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i];
 435
 436                 if (!info->driver || !(info->flags & DRM_VIRTUAL_DEVICE))
 437                         continue;
 438
 439                 pdev = platform_device_register_simple(
 440                                         info->driver->driver.name, -1, NULL, 0);
 441                 if (IS_ERR(pdev))
 442                         goto fail;
 443         }
 444
 445         return 0;
 446 fail:
 447         exynos_drm_unregister_devices();
 448         return PTR_ERR(pdev);
 449 }
 450
 451 static void exynos_drm_unregister_drivers(void)
 452 {
 453         int i;
 454
 455         for (i = ARRAY_SIZE(exynos_drm_drivers) - 1; i >= 0; --i) {
 456                 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i];
 457
 458                 if (!info->driver)
 459                         continue;
 460
 461                 platform_driver_unregister(info->driver);
 462         }
 463 }
 464
 465 static int exynos_drm_register_drivers(void)
 466 {
 467         int i, ret;
 468
 469         for (i = 0; i < ARRAY_SIZE(exynos_drm_drivers); ++i) {
 470                 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i];
 471
 472                 if (!info->driver)
 473                         continue;
 474
 475                 ret = platform_driver_register(info->driver);
 476                 if (ret)
 477                         goto fail;
 478         }
 479         return 0;
 480 fail:
 481         exynos_drm_unregister_drivers();
 482         return ret;
 483 }
 484
 485 static int exynos_drm_init(void)
 486 {
 487         int ret;
 488
 489         ret = exynos_drm_register_devices();
 490         if (ret)
 491                 return ret;
 492
 493         ret = exynos_drm_register_drivers();
 494         if (ret)
 495                 goto err_unregister_pdevs;
 496
 497         return 0;
 498
 499 err_unregister_pdevs:
 500         exynos_drm_unregister_devices();
 501
 502         return ret;
 503 }
 504
 505 static void exynos_drm_exit(void)
 506 {
 507         exynos_drm_unregister_drivers();
 508         exynos_drm_unregister_devices();
 509 }
 510
 511 module_init(exynos_drm_init);
 512 module_exit(exynos_drm_exit);
 513
 514 MODULE_AUTHOR("Inki Dae <inki.dae@samsung.com>");
 515 MODULE_AUTHOR("Joonyoung Shim <jy0922.shim@samsung.com>");
 516 MODULE_AUTHOR("Seung-Woo Kim <sw0312.kim@samsung.com>");
 517 MODULE_DESCRIPTION("Samsung SoC DRM Driver");
 518 MODULE_LICENSE("GPL");