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_fb_helper.h>
  19 #include <drm/drm_probe_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
  34 #define DRIVER_NAME     "exynos"
  35 #define DRIVER_DESC     "Samsung SoC DRM"
  36 #define DRIVER_DATE     "20180330"
  37
  38 /*
  39  * Interface history:
  40  *
  41  * 1.0 - Original version
  42  * 1.1 - Upgrade IPP driver to version 2.0
  43  */
  44 #define DRIVER_MAJOR    1
  45 #define DRIVER_MINOR    1
  46
  47 static int exynos_drm_open(struct drm_device *dev, struct drm_file *file)
  48 {
  49         struct drm_exynos_file_private *file_priv;
  50         int ret;
  51
  52         file_priv = kzalloc(sizeof(*file_priv), GFP_KERNEL);
  53         if (!file_priv)
  54                 return -ENOMEM;
  55
  56         file->driver_priv = file_priv;
  57         ret = g2d_open(dev, file);
  58         if (ret)
  59                 goto err_file_priv_free;
  60
  61         return ret;
  62
  63 err_file_priv_free:
  64         kfree(file_priv);
  65         file->driver_priv = NULL;
  66         return ret;
  67 }
  68
  69 static void exynos_drm_postclose(struct drm_device *dev, struct drm_file *file)
  70 {
  71         g2d_close(dev, file);
  72         kfree(file->driver_priv);
  73         file->driver_priv = NULL;
  74 }
  75
  76 static const struct vm_operations_struct exynos_drm_gem_vm_ops = {
  77         .fault = exynos_drm_gem_fault,
  78         .open = drm_gem_vm_open,
  79         .close = drm_gem_vm_close,
  80 };
  81
  82 static const struct drm_ioctl_desc exynos_ioctls[] = {
  83         DRM_IOCTL_DEF_DRV(EXYNOS_GEM_CREATE, exynos_drm_gem_create_ioctl,
  84                         DRM_AUTH | DRM_RENDER_ALLOW),
  85         DRM_IOCTL_DEF_DRV(EXYNOS_GEM_MAP, exynos_drm_gem_map_ioctl,
  86                         DRM_AUTH | DRM_RENDER_ALLOW),
  87         DRM_IOCTL_DEF_DRV(EXYNOS_GEM_GET, exynos_drm_gem_get_ioctl,
  88                         DRM_RENDER_ALLOW),
  89         DRM_IOCTL_DEF_DRV(EXYNOS_VIDI_CONNECTION, vidi_connection_ioctl,
  90                         DRM_AUTH),
  91         DRM_IOCTL_DEF_DRV(EXYNOS_G2D_GET_VER, exynos_g2d_get_ver_ioctl,
  92                         DRM_AUTH | DRM_RENDER_ALLOW),
  93         DRM_IOCTL_DEF_DRV(EXYNOS_G2D_SET_CMDLIST, exynos_g2d_set_cmdlist_ioctl,
  94                         DRM_AUTH | DRM_RENDER_ALLOW),
  95         DRM_IOCTL_DEF_DRV(EXYNOS_G2D_EXEC, exynos_g2d_exec_ioctl,
  96                         DRM_AUTH | DRM_RENDER_ALLOW),
  97         DRM_IOCTL_DEF_DRV(EXYNOS_IPP_GET_RESOURCES,
  98                         exynos_drm_ipp_get_res_ioctl,
  99                         DRM_AUTH | DRM_RENDER_ALLOW),
 100         DRM_IOCTL_DEF_DRV(EXYNOS_IPP_GET_CAPS, exynos_drm_ipp_get_caps_ioctl,
 101                         DRM_AUTH | DRM_RENDER_ALLOW),
 102         DRM_IOCTL_DEF_DRV(EXYNOS_IPP_GET_LIMITS,
 103                         exynos_drm_ipp_get_limits_ioctl,
 104                         DRM_AUTH | DRM_RENDER_ALLOW),
 105         DRM_IOCTL_DEF_DRV(EXYNOS_IPP_COMMIT, exynos_drm_ipp_commit_ioctl,
 106                         DRM_AUTH | DRM_RENDER_ALLOW),
 107 };
 108
 109 static const struct file_operations exynos_drm_driver_fops = {
 110         .owner          = THIS_MODULE,
 111         .open           = drm_open,
 112         .mmap           = exynos_drm_gem_mmap,
 113         .poll           = drm_poll,
 114         .read           = drm_read,
 115         .unlocked_ioctl = drm_ioctl,
 116         .compat_ioctl = drm_compat_ioctl,
 117         .release        = drm_release,
 118 };
 119
 120 static struct drm_driver exynos_drm_driver = {
 121         .driver_features        = DRIVER_MODESET | DRIVER_GEM | DRIVER_PRIME
 122                                   | DRIVER_ATOMIC | DRIVER_RENDER,
 123         .open                   = exynos_drm_open,
 124         .lastclose              = drm_fb_helper_lastclose,
 125         .postclose              = exynos_drm_postclose,
 126         .gem_free_object_unlocked = exynos_drm_gem_free_object,
 127         .gem_vm_ops             = &exynos_drm_gem_vm_ops,
 128         .dumb_create            = exynos_drm_gem_dumb_create,
 129         .prime_handle_to_fd     = drm_gem_prime_handle_to_fd,
 130         .prime_fd_to_handle     = drm_gem_prime_fd_to_handle,
 131         .gem_prime_export       = drm_gem_prime_export,
 132         .gem_prime_import       = exynos_drm_gem_prime_import,
 133         .gem_prime_get_sg_table = exynos_drm_gem_prime_get_sg_table,
 134         .gem_prime_import_sg_table      = exynos_drm_gem_prime_import_sg_table,
 135         .gem_prime_vmap         = exynos_drm_gem_prime_vmap,
 136         .gem_prime_vunmap       = exynos_drm_gem_prime_vunmap,
 137         .gem_prime_mmap         = exynos_drm_gem_prime_mmap,
 138         .ioctls                 = exynos_ioctls,
 139         .num_ioctls             = ARRAY_SIZE(exynos_ioctls),
 140         .fops                   = &exynos_drm_driver_fops,
 141         .name   = DRIVER_NAME,
 142         .desc   = DRIVER_DESC,
 143         .date   = DRIVER_DATE,
 144         .major  = DRIVER_MAJOR,
 145         .minor  = DRIVER_MINOR,
 146 };
 147
 148 static int exynos_drm_suspend(struct device *dev)
 149 {
 150         struct drm_device *drm_dev = dev_get_drvdata(dev);
 151
 152         return  drm_mode_config_helper_suspend(drm_dev);
 153 }
 154
 155 static void exynos_drm_resume(struct device *dev)
 156 {
 157         struct drm_device *drm_dev = dev_get_drvdata(dev);
 158
 159         drm_mode_config_helper_resume(drm_dev);
 160 }
 161
 162 static const struct dev_pm_ops exynos_drm_pm_ops = {
 163         .prepare = exynos_drm_suspend,
 164         .complete = exynos_drm_resume,
 165 };
 166
 167 /* forward declaration */
 168 static struct platform_driver exynos_drm_platform_driver;
 169
 170 struct exynos_drm_driver_info {
 171         struct platform_driver *driver;
 172         unsigned int flags;
 173 };
 174
 175 #define DRM_COMPONENT_DRIVER    BIT(0)  /* supports component framework */
 176 #define DRM_VIRTUAL_DEVICE      BIT(1)  /* create virtual platform device */
 177 #define DRM_FIMC_DEVICE         BIT(2)  /* devices shared with V4L2 subsystem */
 178
 179 #define DRV_PTR(drv, cond) (IS_ENABLED(cond) ? &drv : NULL)
 180
 181 /*
 182  * Connector drivers should not be placed before associated crtc drivers,
 183  * because connector requires pipe number of its crtc during initialization.
 184  */
 185 static struct exynos_drm_driver_info exynos_drm_drivers[] = {
 186         {
 187                 DRV_PTR(fimd_driver, CONFIG_DRM_EXYNOS_FIMD),
 188                 DRM_COMPONENT_DRIVER
 189         }, {
 190                 DRV_PTR(exynos5433_decon_driver, CONFIG_DRM_EXYNOS5433_DECON),
 191                 DRM_COMPONENT_DRIVER
 192         }, {
 193                 DRV_PTR(decon_driver, CONFIG_DRM_EXYNOS7_DECON),
 194                 DRM_COMPONENT_DRIVER
 195         }, {
 196                 DRV_PTR(mixer_driver, CONFIG_DRM_EXYNOS_MIXER),
 197                 DRM_COMPONENT_DRIVER
 198         }, {
 199                 DRV_PTR(mic_driver, CONFIG_DRM_EXYNOS_MIC),
 200                 DRM_COMPONENT_DRIVER
 201         }, {
 202                 DRV_PTR(dp_driver, CONFIG_DRM_EXYNOS_DP),
 203                 DRM_COMPONENT_DRIVER
 204         }, {
 205                 DRV_PTR(dsi_driver, CONFIG_DRM_EXYNOS_DSI),
 206                 DRM_COMPONENT_DRIVER
 207         }, {
 208                 DRV_PTR(hdmi_driver, CONFIG_DRM_EXYNOS_HDMI),
 209                 DRM_COMPONENT_DRIVER
 210         }, {
 211                 DRV_PTR(vidi_driver, CONFIG_DRM_EXYNOS_VIDI),
 212                 DRM_COMPONENT_DRIVER | DRM_VIRTUAL_DEVICE
 213         }, {
 214                 DRV_PTR(g2d_driver, CONFIG_DRM_EXYNOS_G2D),
 215                 DRM_COMPONENT_DRIVER
 216         }, {
 217                 DRV_PTR(fimc_driver, CONFIG_DRM_EXYNOS_FIMC),
 218                 DRM_COMPONENT_DRIVER | DRM_FIMC_DEVICE,
 219         }, {
 220                 DRV_PTR(rotator_driver, CONFIG_DRM_EXYNOS_ROTATOR),
 221                 DRM_COMPONENT_DRIVER
 222         }, {
 223                 DRV_PTR(scaler_driver, CONFIG_DRM_EXYNOS_SCALER),
 224                 DRM_COMPONENT_DRIVER
 225         }, {
 226                 DRV_PTR(gsc_driver, CONFIG_DRM_EXYNOS_GSC),
 227                 DRM_COMPONENT_DRIVER
 228         }, {
 229                 &exynos_drm_platform_driver,
 230                 DRM_VIRTUAL_DEVICE
 231         }
 232 };
 233
 234 static int compare_dev(struct device *dev, void *data)
 235 {
 236         return dev == (struct device *)data;
 237 }
 238
 239 static struct component_match *exynos_drm_match_add(struct device *dev)
 240 {
 241         struct component_match *match = NULL;
 242         int i;
 243
 244         for (i = 0; i < ARRAY_SIZE(exynos_drm_drivers); ++i) {
 245                 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i];
 246                 struct device *p = NULL, *d;
 247
 248                 if (!info->driver || !(info->flags & DRM_COMPONENT_DRIVER))
 249                         continue;
 250
 251                 while ((d = bus_find_device(&platform_bus_type, p,
 252                                             &info->driver->driver,
 253                                             (void *)platform_bus_type.match))) {
 254                         put_device(p);
 255
 256                         if (!(info->flags & DRM_FIMC_DEVICE) ||
 257                             exynos_drm_check_fimc_device(d) == 0)
 258                                 component_match_add(dev, &match,
 259                                                     compare_dev, d);
 260                         p = d;
 261                 }
 262                 put_device(p);
 263         }
 264
 265         return match ?: ERR_PTR(-ENODEV);
 266 }
 267
 268 static int exynos_drm_bind(struct device *dev)
 269 {
 270         struct exynos_drm_private *private;
 271         struct drm_encoder *encoder;
 272         struct drm_device *drm;
 273         unsigned int clone_mask;
 274         int cnt, ret;
 275
 276         drm = drm_dev_alloc(&exynos_drm_driver, dev);
 277         if (IS_ERR(drm))
 278                 return PTR_ERR(drm);
 279
 280         private = kzalloc(sizeof(struct exynos_drm_private), GFP_KERNEL);
 281         if (!private) {
 282                 ret = -ENOMEM;
 283                 goto err_free_drm;
 284         }
 285
 286         init_waitqueue_head(&private->wait);
 287         spin_lock_init(&private->lock);
 288
 289         dev_set_drvdata(dev, drm);
 290         drm->dev_private = (void *)private;
 291
 292         drm_mode_config_init(drm);
 293
 294         exynos_drm_mode_config_init(drm);
 295
 296         /* setup possible_clones. */
 297         cnt = 0;
 298         clone_mask = 0;
 299         list_for_each_entry(encoder, &drm->mode_config.encoder_list, head)
 300                 clone_mask |= (1 << (cnt++));
 301
 302         list_for_each_entry(encoder, &drm->mode_config.encoder_list, head)
 303                 encoder->possible_clones = clone_mask;
 304
 305         /* Try to bind all sub drivers. */
 306         ret = component_bind_all(drm->dev, drm);
 307         if (ret)
 308                 goto err_mode_config_cleanup;
 309
 310         ret = drm_vblank_init(drm, drm->mode_config.num_crtc);
 311         if (ret)
 312                 goto err_unbind_all;
 313
 314         drm_mode_config_reset(drm);
 315
 316         /*
 317          * enable drm irq mode.
 318          * - with irq_enabled = true, we can use the vblank feature.
 319          *
 320          * P.S. note that we wouldn't use drm irq handler but
 321          *      just specific driver own one instead because
 322          *      drm framework supports only one irq handler.
 323          */
 324         drm->irq_enabled = true;
 325
 326         /* init kms poll for handling hpd */
 327         drm_kms_helper_poll_init(drm);
 328
 329         ret = exynos_drm_fbdev_init(drm);
 330         if (ret)
 331                 goto err_cleanup_poll;
 332
 333         /* register the DRM device */
 334         ret = drm_dev_register(drm, 0);
 335         if (ret < 0)
 336                 goto err_cleanup_fbdev;
 337
 338         return 0;
 339
 340 err_cleanup_fbdev:
 341         exynos_drm_fbdev_fini(drm);
 342 err_cleanup_poll:
 343         drm_kms_helper_poll_fini(drm);
 344 err_unbind_all:
 345         component_unbind_all(drm->dev, drm);
 346 err_mode_config_cleanup:
 347         drm_mode_config_cleanup(drm);
 348         exynos_drm_cleanup_dma(drm);
 349         kfree(private);
 350 err_free_drm:
 351         drm_dev_put(drm);
 352
 353         return ret;
 354 }
 355
 356 static void exynos_drm_unbind(struct device *dev)
 357 {
 358         struct drm_device *drm = dev_get_drvdata(dev);
 359
 360         drm_dev_unregister(drm);
 361
 362         exynos_drm_fbdev_fini(drm);
 363         drm_kms_helper_poll_fini(drm);
 364
 365         component_unbind_all(drm->dev, drm);
 366         drm_mode_config_cleanup(drm);
 367         exynos_drm_cleanup_dma(drm);
 368
 369         kfree(drm->dev_private);
 370         drm->dev_private = NULL;
 371         dev_set_drvdata(dev, NULL);
 372
 373         drm_dev_put(drm);
 374 }
 375
 376 static const struct component_master_ops exynos_drm_ops = {
 377         .bind           = exynos_drm_bind,
 378         .unbind         = exynos_drm_unbind,
 379 };
 380
 381 static int exynos_drm_platform_probe(struct platform_device *pdev)
 382 {
 383         struct component_match *match;
 384
 385         pdev->dev.coherent_dma_mask = DMA_BIT_MASK(32);
 386
 387         match = exynos_drm_match_add(&pdev->dev);
 388         if (IS_ERR(match))
 389                 return PTR_ERR(match);
 390
 391         return component_master_add_with_match(&pdev->dev, &exynos_drm_ops,
 392                                                match);
 393 }
 394
 395 static int exynos_drm_platform_remove(struct platform_device *pdev)
 396 {
 397         component_master_del(&pdev->dev, &exynos_drm_ops);
 398         return 0;
 399 }
 400
 401 static struct platform_driver exynos_drm_platform_driver = {
 402         .probe  = exynos_drm_platform_probe,
 403         .remove = exynos_drm_platform_remove,
 404         .driver = {
 405                 .name   = "exynos-drm",
 406                 .pm     = &exynos_drm_pm_ops,
 407         },
 408 };
 409
 410 static void exynos_drm_unregister_devices(void)
 411 {
 412         int i;
 413
 414         for (i = ARRAY_SIZE(exynos_drm_drivers) - 1; i >= 0; --i) {
 415                 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i];
 416                 struct device *dev;
 417
 418                 if (!info->driver || !(info->flags & DRM_VIRTUAL_DEVICE))
 419                         continue;
 420
 421                 while ((dev = bus_find_device(&platform_bus_type, NULL,
 422                                             &info->driver->driver,
 423                                             (void *)platform_bus_type.match))) {
 424                         put_device(dev);
 425                         platform_device_unregister(to_platform_device(dev));
 426                 }
 427         }
 428 }
 429
 430 static int exynos_drm_register_devices(void)
 431 {
 432         struct platform_device *pdev;
 433         int i;
 434
 435         for (i = 0; i < ARRAY_SIZE(exynos_drm_drivers); ++i) {
 436                 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i];
 437
 438                 if (!info->driver || !(info->flags & DRM_VIRTUAL_DEVICE))
 439                         continue;
 440
 441                 pdev = platform_device_register_simple(
 442                                         info->driver->driver.name, -1, NULL, 0);
 443                 if (IS_ERR(pdev))
 444                         goto fail;
 445         }
 446
 447         return 0;
 448 fail:
 449         exynos_drm_unregister_devices();
 450         return PTR_ERR(pdev);
 451 }
 452
 453 static void exynos_drm_unregister_drivers(void)
 454 {
 455         int i;
 456
 457         for (i = ARRAY_SIZE(exynos_drm_drivers) - 1; i >= 0; --i) {
 458                 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i];
 459
 460                 if (!info->driver)
 461                         continue;
 462
 463                 platform_driver_unregister(info->driver);
 464         }
 465 }
 466
 467 static int exynos_drm_register_drivers(void)
 468 {
 469         int i, ret;
 470
 471         for (i = 0; i < ARRAY_SIZE(exynos_drm_drivers); ++i) {
 472                 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i];
 473
 474                 if (!info->driver)
 475                         continue;
 476
 477                 ret = platform_driver_register(info->driver);
 478                 if (ret)
 479                         goto fail;
 480         }
 481         return 0;
 482 fail:
 483         exynos_drm_unregister_drivers();
 484         return ret;
 485 }
 486
 487 static int exynos_drm_init(void)
 488 {
 489         int ret;
 490
 491         ret = exynos_drm_register_devices();
 492         if (ret)
 493                 return ret;
 494
 495         ret = exynos_drm_register_drivers();
 496         if (ret)
 497                 goto err_unregister_pdevs;
 498
 499         return 0;
 500
 501 err_unregister_pdevs:
 502         exynos_drm_unregister_devices();
 503
 504         return ret;
 505 }
 506
 507 static void exynos_drm_exit(void)
 508 {
 509         exynos_drm_unregister_drivers();
 510         exynos_drm_unregister_devices();
 511 }
 512
 513 module_init(exynos_drm_init);
 514 module_exit(exynos_drm_exit);
 515
 516 MODULE_AUTHOR("Inki Dae <inki.dae@samsung.com>");
 517 MODULE_AUTHOR("Joonyoung Shim <jy0922.shim@samsung.com>");
 518 MODULE_AUTHOR("Seung-Woo Kim <sw0312.kim@samsung.com>");
 519 MODULE_DESCRIPTION("Samsung SoC DRM Driver");
 520 MODULE_LICENSE("GPL");