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_crtc_helper.h>
  17
  18 #include <linux/component.h>
  19
  20 #include <drm/exynos_drm.h>
  21
  22 #include "exynos_drm_drv.h"
  23 #include "exynos_drm_crtc.h"
  24 #include "exynos_drm_encoder.h"
  25 #include "exynos_drm_fbdev.h"
  26 #include "exynos_drm_fb.h"
  27 #include "exynos_drm_gem.h"
  28 #include "exynos_drm_plane.h"
  29 #include "exynos_drm_vidi.h"
  30 #include "exynos_drm_dmabuf.h"
  31 #include "exynos_drm_g2d.h"
  32 #include "exynos_drm_ipp.h"
  33 #include "exynos_drm_iommu.h"
  34
  35 #define DRIVER_NAME     "exynos"
  36 #define DRIVER_DESC     "Samsung SoC DRM"
  37 #define DRIVER_DATE     "20110530"
  38 #define DRIVER_MAJOR    1
  39 #define DRIVER_MINOR    0
  40
  41 static int exynos_drm_load(struct drm_device *dev, unsigned long flags)
  42 {
  43         struct exynos_drm_private *private;
  44         int ret;
  45
  46         private = kzalloc(sizeof(struct exynos_drm_private), GFP_KERNEL);
  47         if (!private)
  48                 return -ENOMEM;
  49
  50         dev_set_drvdata(dev->dev, dev);
  51         dev->dev_private = (void *)private;
  52
  53         /*
  54          * create mapping to manage iommu table and set a pointer to iommu
  55          * mapping structure to iommu_mapping of private data.
  56          * also this iommu_mapping can be used to check if iommu is supported
  57          * or not.
  58          */
  59         ret = drm_create_iommu_mapping(dev);
  60         if (ret < 0) {
  61                 DRM_ERROR("failed to create iommu mapping.\n");
  62                 goto err_free_private;
  63         }
  64
  65         drm_mode_config_init(dev);
  66
  67         exynos_drm_mode_config_init(dev);
  68
  69         /* setup possible_clones. */
  70         exynos_drm_encoder_setup(dev);
  71
  72         platform_set_drvdata(dev->platformdev, dev);
  73
  74         /* Try to bind all sub drivers. */
  75         ret = component_bind_all(dev->dev, dev);
  76         if (ret)
  77                 goto err_mode_config_cleanup;
  78
  79         ret = drm_vblank_init(dev, dev->mode_config.num_crtc);
  80         if (ret)
  81                 goto err_unbind_all;
  82
  83         /* Probe non kms sub drivers and virtual display driver. */
  84         ret = exynos_drm_device_subdrv_probe(dev);
  85         if (ret)
  86                 goto err_cleanup_vblank;
  87
  88         drm_mode_config_reset(dev);
  89
  90         /*
  91          * enable drm irq mode.
  92          * - with irq_enabled = true, we can use the vblank feature.
  93          *
  94          * P.S. note that we wouldn't use drm irq handler but
  95          *      just specific driver own one instead because
  96          *      drm framework supports only one irq handler.
  97          */
  98         dev->irq_enabled = true;
  99
 100         /*
 101          * with vblank_disable_allowed = true, vblank interrupt will be disabled
 102          * by drm timer once a current process gives up ownership of
 103          * vblank event.(after drm_vblank_put function is called)
 104          */
 105         dev->vblank_disable_allowed = true;
 106
 107         /* init kms poll for handling hpd */
 108         drm_kms_helper_poll_init(dev);
 109
 110         /* force connectors detection */
 111         drm_helper_hpd_irq_event(dev);
 112
 113         return 0;
 114
 115 err_cleanup_vblank:
 116         drm_vblank_cleanup(dev);
 117 err_unbind_all:
 118         component_unbind_all(dev->dev, dev);
 119 err_mode_config_cleanup:
 120         drm_mode_config_cleanup(dev);
 121         drm_release_iommu_mapping(dev);
 122 err_free_private:
 123         kfree(private);
 124
 125         return ret;
 126 }
 127
 128 static int exynos_drm_unload(struct drm_device *dev)
 129 {
 130         exynos_drm_device_subdrv_remove(dev);
 131
 132         exynos_drm_fbdev_fini(dev);
 133         drm_kms_helper_poll_fini(dev);
 134
 135         drm_vblank_cleanup(dev);
 136         component_unbind_all(dev->dev, dev);
 137         drm_mode_config_cleanup(dev);
 138         drm_release_iommu_mapping(dev);
 139
 140         kfree(dev->dev_private);
 141         dev->dev_private = NULL;
 142
 143         return 0;
 144 }
 145
 146 static int exynos_drm_suspend(struct drm_device *dev, pm_message_t state)
 147 {
 148         struct drm_connector *connector;
 149
 150         drm_modeset_lock_all(dev);
 151         list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
 152                 int old_dpms = connector->dpms;
 153
 154                 if (connector->funcs->dpms)
 155                         connector->funcs->dpms(connector, DRM_MODE_DPMS_OFF);
 156
 157                 /* Set the old mode back to the connector for resume */
 158                 connector->dpms = old_dpms;
 159         }
 160         drm_modeset_unlock_all(dev);
 161
 162         return 0;
 163 }
 164
 165 static int exynos_drm_resume(struct drm_device *dev)
 166 {
 167         struct drm_connector *connector;
 168
 169         drm_modeset_lock_all(dev);
 170         list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
 171                 if (connector->funcs->dpms) {
 172                         int dpms = connector->dpms;
 173
 174                         connector->dpms = DRM_MODE_DPMS_OFF;
 175                         connector->funcs->dpms(connector, dpms);
 176                 }
 177         }
 178         drm_modeset_unlock_all(dev);
 179
 180         return 0;
 181 }
 182
 183 static int exynos_drm_open(struct drm_device *dev, struct drm_file *file)
 184 {
 185         struct drm_exynos_file_private *file_priv;
 186         int ret;
 187
 188         file_priv = kzalloc(sizeof(*file_priv), GFP_KERNEL);
 189         if (!file_priv)
 190                 return -ENOMEM;
 191
 192         file->driver_priv = file_priv;
 193
 194         ret = exynos_drm_subdrv_open(dev, file);
 195         if (ret)
 196                 goto err_file_priv_free;
 197
 198         return ret;
 199
 200 err_file_priv_free:
 201         kfree(file_priv);
 202         file->driver_priv = NULL;
 203         return ret;
 204 }
 205
 206 static void exynos_drm_preclose(struct drm_device *dev,
 207                                         struct drm_file *file)
 208 {
 209         exynos_drm_subdrv_close(dev, file);
 210 }
 211
 212 static void exynos_drm_postclose(struct drm_device *dev, struct drm_file *file)
 213 {
 214         struct drm_pending_event *e, *et;
 215         unsigned long flags;
 216
 217         if (!file->driver_priv)
 218                 return;
 219
 220         spin_lock_irqsave(&dev->event_lock, flags);
 221         /* Release all events handled by page flip handler but not freed. */
 222         list_for_each_entry_safe(e, et, &file->event_list, link) {
 223                 list_del(&e->link);
 224                 e->destroy(e);
 225         }
 226         spin_unlock_irqrestore(&dev->event_lock, flags);
 227
 228         kfree(file->driver_priv);
 229         file->driver_priv = NULL;
 230 }
 231
 232 static void exynos_drm_lastclose(struct drm_device *dev)
 233 {
 234         exynos_drm_fbdev_restore_mode(dev);
 235 }
 236
 237 static const struct vm_operations_struct exynos_drm_gem_vm_ops = {
 238         .fault = exynos_drm_gem_fault,
 239         .open = drm_gem_vm_open,
 240         .close = drm_gem_vm_close,
 241 };
 242
 243 static const struct drm_ioctl_desc exynos_ioctls[] = {
 244         DRM_IOCTL_DEF_DRV(EXYNOS_GEM_CREATE, exynos_drm_gem_create_ioctl,
 245                         DRM_UNLOCKED | DRM_AUTH),
 246         DRM_IOCTL_DEF_DRV(EXYNOS_GEM_GET,
 247                         exynos_drm_gem_get_ioctl, DRM_UNLOCKED),
 248         DRM_IOCTL_DEF_DRV(EXYNOS_VIDI_CONNECTION,
 249                         vidi_connection_ioctl, DRM_UNLOCKED | DRM_AUTH),
 250         DRM_IOCTL_DEF_DRV(EXYNOS_G2D_GET_VER,
 251                         exynos_g2d_get_ver_ioctl, DRM_UNLOCKED | DRM_AUTH),
 252         DRM_IOCTL_DEF_DRV(EXYNOS_G2D_SET_CMDLIST,
 253                         exynos_g2d_set_cmdlist_ioctl, DRM_UNLOCKED | DRM_AUTH),
 254         DRM_IOCTL_DEF_DRV(EXYNOS_G2D_EXEC,
 255                         exynos_g2d_exec_ioctl, DRM_UNLOCKED | DRM_AUTH),
 256         DRM_IOCTL_DEF_DRV(EXYNOS_IPP_GET_PROPERTY,
 257                         exynos_drm_ipp_get_property, DRM_UNLOCKED | DRM_AUTH),
 258         DRM_IOCTL_DEF_DRV(EXYNOS_IPP_SET_PROPERTY,
 259                         exynos_drm_ipp_set_property, DRM_UNLOCKED | DRM_AUTH),
 260         DRM_IOCTL_DEF_DRV(EXYNOS_IPP_QUEUE_BUF,
 261                         exynos_drm_ipp_queue_buf, DRM_UNLOCKED | DRM_AUTH),
 262         DRM_IOCTL_DEF_DRV(EXYNOS_IPP_CMD_CTRL,
 263                         exynos_drm_ipp_cmd_ctrl, DRM_UNLOCKED | DRM_AUTH),
 264 };
 265
 266 static const struct file_operations exynos_drm_driver_fops = {
 267         .owner          = THIS_MODULE,
 268         .open           = drm_open,
 269         .mmap           = exynos_drm_gem_mmap,
 270         .poll           = drm_poll,
 271         .read           = drm_read,
 272         .unlocked_ioctl = drm_ioctl,
 273 #ifdef CONFIG_COMPAT
 274         .compat_ioctl = drm_compat_ioctl,
 275 #endif
 276         .release        = drm_release,
 277 };
 278
 279 static struct drm_driver exynos_drm_driver = {
 280         .driver_features        = DRIVER_MODESET | DRIVER_GEM | DRIVER_PRIME,
 281         .load                   = exynos_drm_load,
 282         .unload                 = exynos_drm_unload,
 283         .suspend                = exynos_drm_suspend,
 284         .resume                 = exynos_drm_resume,
 285         .open                   = exynos_drm_open,
 286         .preclose               = exynos_drm_preclose,
 287         .lastclose              = exynos_drm_lastclose,
 288         .postclose              = exynos_drm_postclose,
 289         .set_busid              = drm_platform_set_busid,
 290         .get_vblank_counter     = drm_vblank_count,
 291         .enable_vblank          = exynos_drm_crtc_enable_vblank,
 292         .disable_vblank         = exynos_drm_crtc_disable_vblank,
 293         .gem_free_object        = exynos_drm_gem_free_object,
 294         .gem_vm_ops             = &exynos_drm_gem_vm_ops,
 295         .dumb_create            = exynos_drm_gem_dumb_create,
 296         .dumb_map_offset        = exynos_drm_gem_dumb_map_offset,
 297         .dumb_destroy           = drm_gem_dumb_destroy,
 298         .prime_handle_to_fd     = drm_gem_prime_handle_to_fd,
 299         .prime_fd_to_handle     = drm_gem_prime_fd_to_handle,
 300         .gem_prime_export       = exynos_dmabuf_prime_export,
 301         .gem_prime_import       = exynos_dmabuf_prime_import,
 302         .ioctls                 = exynos_ioctls,
 303         .num_ioctls             = ARRAY_SIZE(exynos_ioctls),
 304         .fops                   = &exynos_drm_driver_fops,
 305         .name   = DRIVER_NAME,
 306         .desc   = DRIVER_DESC,
 307         .date   = DRIVER_DATE,
 308         .major  = DRIVER_MAJOR,
 309         .minor  = DRIVER_MINOR,
 310 };
 311
 312 #ifdef CONFIG_PM_SLEEP
 313 static int exynos_drm_sys_suspend(struct device *dev)
 314 {
 315         struct drm_device *drm_dev = dev_get_drvdata(dev);
 316         pm_message_t message;
 317
 318         if (pm_runtime_suspended(dev) || !drm_dev)
 319                 return 0;
 320
 321         message.event = PM_EVENT_SUSPEND;
 322         return exynos_drm_suspend(drm_dev, message);
 323 }
 324
 325 static int exynos_drm_sys_resume(struct device *dev)
 326 {
 327         struct drm_device *drm_dev = dev_get_drvdata(dev);
 328
 329         if (pm_runtime_suspended(dev) || !drm_dev)
 330                 return 0;
 331
 332         return exynos_drm_resume(drm_dev);
 333 }
 334 #endif
 335
 336 static const struct dev_pm_ops exynos_drm_pm_ops = {
 337         SET_SYSTEM_SLEEP_PM_OPS(exynos_drm_sys_suspend, exynos_drm_sys_resume)
 338 };
 339
 340 /* forward declaration */
 341 static struct platform_driver exynos_drm_platform_driver;
 342
 343 /*
 344  * Connector drivers should not be placed before associated crtc drivers,
 345  * because connector requires pipe number of its crtc during initialization.
 346  */
 347 static struct platform_driver *const exynos_drm_kms_drivers[] = {
 348 #ifdef CONFIG_DRM_EXYNOS_VIDI
 349         &vidi_driver,
 350 #endif
 351 #ifdef CONFIG_DRM_EXYNOS_FIMD
 352         &fimd_driver,
 353 #endif
 354 #ifdef CONFIG_DRM_EXYNOS5433_DECON
 355         &exynos5433_decon_driver,
 356 #endif
 357 #ifdef CONFIG_DRM_EXYNOS7_DECON
 358         &decon_driver,
 359 #endif
 360 #ifdef CONFIG_DRM_EXYNOS_DP
 361         &dp_driver,
 362 #endif
 363 #ifdef CONFIG_DRM_EXYNOS_DSI
 364         &dsi_driver,
 365 #endif
 366 #ifdef CONFIG_DRM_EXYNOS_HDMI
 367         &mixer_driver,
 368         &hdmi_driver,
 369 #endif
 370 };
 371
 372 static struct platform_driver *const exynos_drm_non_kms_drivers[] = {
 373 #ifdef CONFIG_DRM_EXYNOS_MIC
 374         &mic_driver,
 375 #endif
 376 #ifdef CONFIG_DRM_EXYNOS_G2D
 377         &g2d_driver,
 378 #endif
 379 #ifdef CONFIG_DRM_EXYNOS_FIMC
 380         &fimc_driver,
 381 #endif
 382 #ifdef CONFIG_DRM_EXYNOS_ROTATOR
 383         &rotator_driver,
 384 #endif
 385 #ifdef CONFIG_DRM_EXYNOS_GSC
 386         &gsc_driver,
 387 #endif
 388 #ifdef CONFIG_DRM_EXYNOS_IPP
 389         &ipp_driver,
 390 #endif
 391         &exynos_drm_platform_driver,
 392 };
 393
 394 static struct platform_driver *const exynos_drm_drv_with_simple_dev[] = {
 395 #ifdef CONFIG_DRM_EXYNOS_VIDI
 396         &vidi_driver,
 397 #endif
 398 #ifdef CONFIG_DRM_EXYNOS_IPP
 399         &ipp_driver,
 400 #endif
 401         &exynos_drm_platform_driver,
 402 };
 403 #define PDEV_COUNT ARRAY_SIZE(exynos_drm_drv_with_simple_dev)
 404
 405 static int compare_dev(struct device *dev, void *data)
 406 {
 407         return dev == (struct device *)data;
 408 }
 409
 410 static struct component_match *exynos_drm_match_add(struct device *dev)
 411 {
 412         struct component_match *match = NULL;
 413         int i;
 414
 415         for (i = 0; i < ARRAY_SIZE(exynos_drm_kms_drivers); ++i) {
 416                 struct device_driver *drv = &exynos_drm_kms_drivers[i]->driver;
 417                 struct device *p = NULL, *d;
 418
 419                 while ((d = bus_find_device(&platform_bus_type, p, drv,
 420                                             (void *)platform_bus_type.match))) {
 421                         put_device(p);
 422                         component_match_add(dev, &match, compare_dev, d);
 423                         p = d;
 424                 }
 425                 put_device(p);
 426         }
 427
 428         return match ?: ERR_PTR(-ENODEV);
 429 }
 430
 431 static int exynos_drm_bind(struct device *dev)
 432 {
 433         return drm_platform_init(&exynos_drm_driver, to_platform_device(dev));
 434 }
 435
 436 static void exynos_drm_unbind(struct device *dev)
 437 {
 438         drm_put_dev(dev_get_drvdata(dev));
 439 }
 440
 441 static const struct component_master_ops exynos_drm_ops = {
 442         .bind           = exynos_drm_bind,
 443         .unbind         = exynos_drm_unbind,
 444 };
 445
 446 static int exynos_drm_platform_probe(struct platform_device *pdev)
 447 {
 448         struct component_match *match;
 449
 450         pdev->dev.coherent_dma_mask = DMA_BIT_MASK(32);
 451         exynos_drm_driver.num_ioctls = ARRAY_SIZE(exynos_ioctls);
 452
 453         match = exynos_drm_match_add(&pdev->dev);
 454         if (IS_ERR(match))
 455                 return PTR_ERR(match);
 456
 457         return component_master_add_with_match(&pdev->dev, &exynos_drm_ops,
 458                                                match);
 459 }
 460
 461 static int exynos_drm_platform_remove(struct platform_device *pdev)
 462 {
 463         component_master_del(&pdev->dev, &exynos_drm_ops);
 464         return 0;
 465 }
 466
 467 static struct platform_driver exynos_drm_platform_driver = {
 468         .probe  = exynos_drm_platform_probe,
 469         .remove = exynos_drm_platform_remove,
 470         .driver = {
 471                 .name   = "exynos-drm",
 472                 .pm     = &exynos_drm_pm_ops,
 473         },
 474 };
 475
 476 static struct platform_device *exynos_drm_pdevs[PDEV_COUNT];
 477
 478 static void exynos_drm_unregister_devices(void)
 479 {
 480         int i = PDEV_COUNT;
 481
 482         while (--i >= 0) {
 483                 platform_device_unregister(exynos_drm_pdevs[i]);
 484                 exynos_drm_pdevs[i] = NULL;
 485         }
 486 }
 487
 488 static int exynos_drm_register_devices(void)
 489 {
 490         int i;
 491
 492         for (i = 0; i < PDEV_COUNT; ++i) {
 493                 struct platform_driver *d = exynos_drm_drv_with_simple_dev[i];
 494                 struct platform_device *pdev =
 495                         platform_device_register_simple(d->driver.name, -1,
 496                                                         NULL, 0);
 497
 498                 if (!IS_ERR(pdev)) {
 499                         exynos_drm_pdevs[i] = pdev;
 500                         continue;
 501                 }
 502                 while (--i >= 0) {
 503                         platform_device_unregister(exynos_drm_pdevs[i]);
 504                         exynos_drm_pdevs[i] = NULL;
 505                 }
 506
 507                 return PTR_ERR(pdev);
 508         }
 509
 510         return 0;
 511 }
 512
 513 static void exynos_drm_unregister_drivers(struct platform_driver * const *drv,
 514                                           int count)
 515 {
 516         while (--count >= 0)
 517                 platform_driver_unregister(drv[count]);
 518 }
 519
 520 static int exynos_drm_register_drivers(struct platform_driver * const *drv,
 521                                        int count)
 522 {
 523         int i, ret;
 524
 525         for (i = 0; i < count; ++i) {
 526                 ret = platform_driver_register(drv[i]);
 527                 if (!ret)
 528                         continue;
 529
 530                 while (--i >= 0)
 531                         platform_driver_unregister(drv[i]);
 532
 533                 return ret;
 534         }
 535
 536         return 0;
 537 }
 538
 539 static inline int exynos_drm_register_kms_drivers(void)
 540 {
 541         return exynos_drm_register_drivers(exynos_drm_kms_drivers,
 542                                         ARRAY_SIZE(exynos_drm_kms_drivers));
 543 }
 544
 545 static inline int exynos_drm_register_non_kms_drivers(void)
 546 {
 547         return exynos_drm_register_drivers(exynos_drm_non_kms_drivers,
 548                                         ARRAY_SIZE(exynos_drm_non_kms_drivers));
 549 }
 550
 551 static inline void exynos_drm_unregister_kms_drivers(void)
 552 {
 553         exynos_drm_unregister_drivers(exynos_drm_kms_drivers,
 554                                         ARRAY_SIZE(exynos_drm_kms_drivers));
 555 }
 556
 557 static inline void exynos_drm_unregister_non_kms_drivers(void)
 558 {
 559         exynos_drm_unregister_drivers(exynos_drm_non_kms_drivers,
 560                                         ARRAY_SIZE(exynos_drm_non_kms_drivers));
 561 }
 562
 563 static const char * const strings[] = {
 564         "samsung,exynos3",
 565         "samsung,exynos4",
 566         "samsung,exynos5",
 567         "samsung,exynos7",
 568 };
 569
 570 static int exynos_drm_init(void)
 571 {
 572         bool is_exynos = false;
 573         int ret, i;
 574
 575         /*
 576          * Register device object only in case of Exynos SoC.
 577          *
 578          * Below codes resolves temporarily infinite loop issue incurred
 579          * by Exynos drm driver when using multi-platform kernel.
 580          * So these codes will be replaced with more generic way later.
 581          */
 582         for (i = 0; i < ARRAY_SIZE(strings); i++) {
 583                 if (of_machine_is_compatible(strings[i])) {
 584                         is_exynos = true;
 585                         break;
 586                 }
 587         }
 588
 589         if (!is_exynos)
 590                 return -ENODEV;
 591
 592         ret = exynos_drm_register_devices();
 593         if (ret)
 594                 return ret;
 595
 596         ret = exynos_drm_register_kms_drivers();
 597         if (ret)
 598                 goto err_unregister_pdevs;
 599
 600         ret = exynos_drm_register_non_kms_drivers();
 601         if (ret)
 602                 goto err_unregister_kms_drivers;
 603
 604         return 0;
 605
 606 err_unregister_kms_drivers:
 607         exynos_drm_unregister_kms_drivers();
 608
 609 err_unregister_pdevs:
 610         exynos_drm_unregister_devices();
 611
 612         return ret;
 613 }
 614
 615 static void exynos_drm_exit(void)
 616 {
 617         exynos_drm_unregister_non_kms_drivers();
 618         exynos_drm_unregister_kms_drivers();
 619         exynos_drm_unregister_devices();
 620 }
 621
 622 module_init(exynos_drm_init);
 623 module_exit(exynos_drm_exit);
 624
 625 MODULE_AUTHOR("Inki Dae <inki.dae@samsung.com>");
 626 MODULE_AUTHOR("Joonyoung Shim <jy0922.shim@samsung.com>");
 627 MODULE_AUTHOR("Seung-Woo Kim <sw0312.kim@samsung.com>");
 628 MODULE_DESCRIPTION("Samsung SoC DRM Driver");
 629 MODULE_LICENSE("GPL");