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_crtc_helper.h> 19 20 #include <linux/component.h> 21 22 #include <drm/exynos_drm.h> 23 24 #include "exynos_drm_drv.h" 25 #include "exynos_drm_crtc.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_vidi.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 struct device *exynos_drm_get_dma_device(void); 42 43 static int exynos_drm_load(struct drm_device *dev, unsigned long flags) 44 { 45 struct exynos_drm_private *private; 46 struct drm_encoder *encoder; 47 unsigned int clone_mask; 48 int cnt, ret; 49 50 private = kzalloc(sizeof(struct exynos_drm_private), GFP_KERNEL); 51 if (!private) 52 return -ENOMEM; 53 54 init_waitqueue_head(&private->wait); 55 spin_lock_init(&private->lock); 56 57 dev_set_drvdata(dev->dev, dev); 58 dev->dev_private = (void *)private; 59 60 /* the first real CRTC device is used for all dma mapping operations */ 61 private->dma_dev = exynos_drm_get_dma_device(); 62 if (!private->dma_dev) { 63 DRM_ERROR("no device found for DMA mapping operations.\n"); 64 ret = -ENODEV; 65 goto err_free_private; 66 } 67 DRM_INFO("Exynos DRM: using %s device for DMA mapping operations\n", 68 dev_name(private->dma_dev)); 69 70 /* create common IOMMU mapping for all devices attached to Exynos DRM */ 71 ret = drm_create_iommu_mapping(dev); 72 if (ret < 0) { 73 DRM_ERROR("failed to create iommu mapping.\n"); 74 goto err_free_private; 75 } 76 77 drm_mode_config_init(dev); 78 79 exynos_drm_mode_config_init(dev); 80 81 /* setup possible_clones. */ 82 cnt = 0; 83 clone_mask = 0; 84 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) 85 clone_mask |= (1 << (cnt++)); 86 87 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) 88 encoder->possible_clones = clone_mask; 89 90 platform_set_drvdata(dev->platformdev, dev); 91 92 /* Try to bind all sub drivers. */ 93 ret = component_bind_all(dev->dev, dev); 94 if (ret) 95 goto err_mode_config_cleanup; 96 97 ret = drm_vblank_init(dev, dev->mode_config.num_crtc); 98 if (ret) 99 goto err_unbind_all; 100 101 /* Probe non kms sub drivers and virtual display driver. */ 102 ret = exynos_drm_device_subdrv_probe(dev); 103 if (ret) 104 goto err_cleanup_vblank; 105 106 drm_mode_config_reset(dev); 107 108 /* 109 * enable drm irq mode. 110 * - with irq_enabled = true, we can use the vblank feature. 111 * 112 * P.S. note that we wouldn't use drm irq handler but 113 * just specific driver own one instead because 114 * drm framework supports only one irq handler. 115 */ 116 dev->irq_enabled = true; 117 118 /* init kms poll for handling hpd */ 119 drm_kms_helper_poll_init(dev); 120 121 /* force connectors detection */ 122 drm_helper_hpd_irq_event(dev); 123 124 return 0; 125 126 err_cleanup_vblank: 127 drm_vblank_cleanup(dev); 128 err_unbind_all: 129 component_unbind_all(dev->dev, dev); 130 err_mode_config_cleanup: 131 drm_mode_config_cleanup(dev); 132 drm_release_iommu_mapping(dev); 133 err_free_private: 134 kfree(private); 135 136 return ret; 137 } 138 139 static void exynos_drm_unload(struct drm_device *dev) 140 { 141 exynos_drm_device_subdrv_remove(dev); 142 143 exynos_drm_fbdev_fini(dev); 144 drm_kms_helper_poll_fini(dev); 145 146 drm_vblank_cleanup(dev); 147 component_unbind_all(dev->dev, dev); 148 drm_mode_config_cleanup(dev); 149 drm_release_iommu_mapping(dev); 150 151 kfree(dev->dev_private); 152 dev->dev_private = NULL; 153 } 154 155 int exynos_atomic_check(struct drm_device *dev, 156 struct drm_atomic_state *state) 157 { 158 int ret; 159 160 ret = drm_atomic_helper_check_modeset(dev, state); 161 if (ret) 162 return ret; 163 164 ret = drm_atomic_normalize_zpos(dev, state); 165 if (ret) 166 return ret; 167 168 ret = drm_atomic_helper_check_planes(dev, state); 169 if (ret) 170 return ret; 171 172 return ret; 173 } 174 175 static int exynos_drm_open(struct drm_device *dev, struct drm_file *file) 176 { 177 struct drm_exynos_file_private *file_priv; 178 int ret; 179 180 file_priv = kzalloc(sizeof(*file_priv), GFP_KERNEL); 181 if (!file_priv) 182 return -ENOMEM; 183 184 file->driver_priv = file_priv; 185 186 ret = exynos_drm_subdrv_open(dev, file); 187 if (ret) 188 goto err_file_priv_free; 189 190 return ret; 191 192 err_file_priv_free: 193 kfree(file_priv); 194 file->driver_priv = NULL; 195 return ret; 196 } 197 198 static void exynos_drm_preclose(struct drm_device *dev, 199 struct drm_file *file) 200 { 201 exynos_drm_subdrv_close(dev, file); 202 } 203 204 static void exynos_drm_postclose(struct drm_device *dev, struct drm_file *file) 205 { 206 kfree(file->driver_priv); 207 file->driver_priv = NULL; 208 } 209 210 static void exynos_drm_lastclose(struct drm_device *dev) 211 { 212 exynos_drm_fbdev_restore_mode(dev); 213 } 214 215 static const struct vm_operations_struct exynos_drm_gem_vm_ops = { 216 .fault = exynos_drm_gem_fault, 217 .open = drm_gem_vm_open, 218 .close = drm_gem_vm_close, 219 }; 220 221 static const struct drm_ioctl_desc exynos_ioctls[] = { 222 DRM_IOCTL_DEF_DRV(EXYNOS_GEM_CREATE, exynos_drm_gem_create_ioctl, 223 DRM_AUTH | DRM_RENDER_ALLOW), 224 DRM_IOCTL_DEF_DRV(EXYNOS_GEM_MAP, exynos_drm_gem_map_ioctl, 225 DRM_AUTH | DRM_RENDER_ALLOW), 226 DRM_IOCTL_DEF_DRV(EXYNOS_GEM_GET, exynos_drm_gem_get_ioctl, 227 DRM_RENDER_ALLOW), 228 DRM_IOCTL_DEF_DRV(EXYNOS_VIDI_CONNECTION, vidi_connection_ioctl, 229 DRM_AUTH), 230 DRM_IOCTL_DEF_DRV(EXYNOS_G2D_GET_VER, exynos_g2d_get_ver_ioctl, 231 DRM_AUTH | DRM_RENDER_ALLOW), 232 DRM_IOCTL_DEF_DRV(EXYNOS_G2D_SET_CMDLIST, exynos_g2d_set_cmdlist_ioctl, 233 DRM_AUTH | DRM_RENDER_ALLOW), 234 DRM_IOCTL_DEF_DRV(EXYNOS_G2D_EXEC, exynos_g2d_exec_ioctl, 235 DRM_AUTH | DRM_RENDER_ALLOW), 236 DRM_IOCTL_DEF_DRV(EXYNOS_IPP_GET_PROPERTY, exynos_drm_ipp_get_property, 237 DRM_AUTH | DRM_RENDER_ALLOW), 238 DRM_IOCTL_DEF_DRV(EXYNOS_IPP_SET_PROPERTY, exynos_drm_ipp_set_property, 239 DRM_AUTH | DRM_RENDER_ALLOW), 240 DRM_IOCTL_DEF_DRV(EXYNOS_IPP_QUEUE_BUF, exynos_drm_ipp_queue_buf, 241 DRM_AUTH | DRM_RENDER_ALLOW), 242 DRM_IOCTL_DEF_DRV(EXYNOS_IPP_CMD_CTRL, exynos_drm_ipp_cmd_ctrl, 243 DRM_AUTH | DRM_RENDER_ALLOW), 244 }; 245 246 static const struct file_operations exynos_drm_driver_fops = { 247 .owner = THIS_MODULE, 248 .open = drm_open, 249 .mmap = exynos_drm_gem_mmap, 250 .poll = drm_poll, 251 .read = drm_read, 252 .unlocked_ioctl = drm_ioctl, 253 .compat_ioctl = drm_compat_ioctl, 254 .release = drm_release, 255 }; 256 257 static struct drm_driver exynos_drm_driver = { 258 .driver_features = DRIVER_MODESET | DRIVER_GEM | DRIVER_PRIME 259 | DRIVER_ATOMIC | DRIVER_RENDER, 260 .load = exynos_drm_load, 261 .unload = exynos_drm_unload, 262 .open = exynos_drm_open, 263 .preclose = exynos_drm_preclose, 264 .lastclose = exynos_drm_lastclose, 265 .postclose = exynos_drm_postclose, 266 .get_vblank_counter = drm_vblank_no_hw_counter, 267 .enable_vblank = exynos_drm_crtc_enable_vblank, 268 .disable_vblank = exynos_drm_crtc_disable_vblank, 269 .gem_free_object_unlocked = exynos_drm_gem_free_object, 270 .gem_vm_ops = &exynos_drm_gem_vm_ops, 271 .dumb_create = exynos_drm_gem_dumb_create, 272 .dumb_map_offset = exynos_drm_gem_dumb_map_offset, 273 .dumb_destroy = drm_gem_dumb_destroy, 274 .prime_handle_to_fd = drm_gem_prime_handle_to_fd, 275 .prime_fd_to_handle = drm_gem_prime_fd_to_handle, 276 .gem_prime_export = drm_gem_prime_export, 277 .gem_prime_import = drm_gem_prime_import, 278 .gem_prime_get_sg_table = exynos_drm_gem_prime_get_sg_table, 279 .gem_prime_import_sg_table = exynos_drm_gem_prime_import_sg_table, 280 .gem_prime_vmap = exynos_drm_gem_prime_vmap, 281 .gem_prime_vunmap = exynos_drm_gem_prime_vunmap, 282 .gem_prime_mmap = exynos_drm_gem_prime_mmap, 283 .ioctls = exynos_ioctls, 284 .num_ioctls = ARRAY_SIZE(exynos_ioctls), 285 .fops = &exynos_drm_driver_fops, 286 .name = DRIVER_NAME, 287 .desc = DRIVER_DESC, 288 .date = DRIVER_DATE, 289 .major = DRIVER_MAJOR, 290 .minor = DRIVER_MINOR, 291 }; 292 293 #ifdef CONFIG_PM_SLEEP 294 static int exynos_drm_suspend(struct device *dev) 295 { 296 struct drm_device *drm_dev = dev_get_drvdata(dev); 297 struct drm_connector *connector; 298 299 if (pm_runtime_suspended(dev) || !drm_dev) 300 return 0; 301 302 drm_modeset_lock_all(drm_dev); 303 drm_for_each_connector(connector, drm_dev) { 304 int old_dpms = connector->dpms; 305 306 if (connector->funcs->dpms) 307 connector->funcs->dpms(connector, DRM_MODE_DPMS_OFF); 308 309 /* Set the old mode back to the connector for resume */ 310 connector->dpms = old_dpms; 311 } 312 drm_modeset_unlock_all(drm_dev); 313 314 return 0; 315 } 316 317 static int exynos_drm_resume(struct device *dev) 318 { 319 struct drm_device *drm_dev = dev_get_drvdata(dev); 320 struct drm_connector *connector; 321 322 if (pm_runtime_suspended(dev) || !drm_dev) 323 return 0; 324 325 drm_modeset_lock_all(drm_dev); 326 drm_for_each_connector(connector, drm_dev) { 327 if (connector->funcs->dpms) { 328 int dpms = connector->dpms; 329 330 connector->dpms = DRM_MODE_DPMS_OFF; 331 connector->funcs->dpms(connector, dpms); 332 } 333 } 334 drm_modeset_unlock_all(drm_dev); 335 336 return 0; 337 } 338 #endif 339 340 static const struct dev_pm_ops exynos_drm_pm_ops = { 341 SET_SYSTEM_SLEEP_PM_OPS(exynos_drm_suspend, exynos_drm_resume) 342 }; 343 344 /* forward declaration */ 345 static struct platform_driver exynos_drm_platform_driver; 346 347 struct exynos_drm_driver_info { 348 struct platform_driver *driver; 349 unsigned int flags; 350 }; 351 352 #define DRM_COMPONENT_DRIVER BIT(0) /* supports component framework */ 353 #define DRM_VIRTUAL_DEVICE BIT(1) /* create virtual platform device */ 354 #define DRM_DMA_DEVICE BIT(2) /* can be used for dma allocations */ 355 356 #define DRV_PTR(drv, cond) (IS_ENABLED(cond) ? &drv : NULL) 357 358 /* 359 * Connector drivers should not be placed before associated crtc drivers, 360 * because connector requires pipe number of its crtc during initialization. 361 */ 362 static struct exynos_drm_driver_info exynos_drm_drivers[] = { 363 { 364 DRV_PTR(fimd_driver, CONFIG_DRM_EXYNOS_FIMD), 365 DRM_COMPONENT_DRIVER | DRM_DMA_DEVICE 366 }, { 367 DRV_PTR(exynos5433_decon_driver, CONFIG_DRM_EXYNOS5433_DECON), 368 DRM_COMPONENT_DRIVER | DRM_DMA_DEVICE 369 }, { 370 DRV_PTR(decon_driver, CONFIG_DRM_EXYNOS7_DECON), 371 DRM_COMPONENT_DRIVER | DRM_DMA_DEVICE 372 }, { 373 DRV_PTR(mixer_driver, CONFIG_DRM_EXYNOS_MIXER), 374 DRM_COMPONENT_DRIVER | DRM_DMA_DEVICE 375 }, { 376 DRV_PTR(mic_driver, CONFIG_DRM_EXYNOS_MIC), 377 DRM_COMPONENT_DRIVER 378 }, { 379 DRV_PTR(dp_driver, CONFIG_DRM_EXYNOS_DP), 380 DRM_COMPONENT_DRIVER 381 }, { 382 DRV_PTR(dsi_driver, CONFIG_DRM_EXYNOS_DSI), 383 DRM_COMPONENT_DRIVER 384 }, { 385 DRV_PTR(hdmi_driver, CONFIG_DRM_EXYNOS_HDMI), 386 DRM_COMPONENT_DRIVER 387 }, { 388 DRV_PTR(vidi_driver, CONFIG_DRM_EXYNOS_VIDI), 389 DRM_COMPONENT_DRIVER | DRM_VIRTUAL_DEVICE 390 }, { 391 DRV_PTR(g2d_driver, CONFIG_DRM_EXYNOS_G2D), 392 }, { 393 DRV_PTR(fimc_driver, CONFIG_DRM_EXYNOS_FIMC), 394 }, { 395 DRV_PTR(rotator_driver, CONFIG_DRM_EXYNOS_ROTATOR), 396 }, { 397 DRV_PTR(gsc_driver, CONFIG_DRM_EXYNOS_GSC), 398 }, { 399 DRV_PTR(ipp_driver, CONFIG_DRM_EXYNOS_IPP), 400 DRM_VIRTUAL_DEVICE 401 }, { 402 &exynos_drm_platform_driver, 403 DRM_VIRTUAL_DEVICE 404 } 405 }; 406 407 static int compare_dev(struct device *dev, void *data) 408 { 409 return dev == (struct device *)data; 410 } 411 412 static struct component_match *exynos_drm_match_add(struct device *dev) 413 { 414 struct component_match *match = NULL; 415 int i; 416 417 for (i = 0; i < ARRAY_SIZE(exynos_drm_drivers); ++i) { 418 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i]; 419 struct device *p = NULL, *d; 420 421 if (!info->driver || !(info->flags & DRM_COMPONENT_DRIVER)) 422 continue; 423 424 while ((d = bus_find_device(&platform_bus_type, p, 425 &info->driver->driver, 426 (void *)platform_bus_type.match))) { 427 put_device(p); 428 component_match_add(dev, &match, compare_dev, d); 429 p = d; 430 } 431 put_device(p); 432 } 433 434 return match ?: ERR_PTR(-ENODEV); 435 } 436 437 static int exynos_drm_bind(struct device *dev) 438 { 439 return drm_platform_init(&exynos_drm_driver, to_platform_device(dev)); 440 } 441 442 static void exynos_drm_unbind(struct device *dev) 443 { 444 drm_put_dev(dev_get_drvdata(dev)); 445 } 446 447 static const struct component_master_ops exynos_drm_ops = { 448 .bind = exynos_drm_bind, 449 .unbind = exynos_drm_unbind, 450 }; 451 452 static int exynos_drm_platform_probe(struct platform_device *pdev) 453 { 454 struct component_match *match; 455 456 pdev->dev.coherent_dma_mask = DMA_BIT_MASK(32); 457 exynos_drm_driver.num_ioctls = ARRAY_SIZE(exynos_ioctls); 458 459 match = exynos_drm_match_add(&pdev->dev); 460 if (IS_ERR(match)) 461 return PTR_ERR(match); 462 463 return component_master_add_with_match(&pdev->dev, &exynos_drm_ops, 464 match); 465 } 466 467 static int exynos_drm_platform_remove(struct platform_device *pdev) 468 { 469 component_master_del(&pdev->dev, &exynos_drm_ops); 470 return 0; 471 } 472 473 static struct platform_driver exynos_drm_platform_driver = { 474 .probe = exynos_drm_platform_probe, 475 .remove = exynos_drm_platform_remove, 476 .driver = { 477 .name = "exynos-drm", 478 .pm = &exynos_drm_pm_ops, 479 }, 480 }; 481 482 static struct device *exynos_drm_get_dma_device(void) 483 { 484 int i; 485 486 for (i = 0; i < ARRAY_SIZE(exynos_drm_drivers); ++i) { 487 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i]; 488 struct device *dev; 489 490 if (!info->driver || !(info->flags & DRM_DMA_DEVICE)) 491 continue; 492 493 while ((dev = bus_find_device(&platform_bus_type, NULL, 494 &info->driver->driver, 495 (void *)platform_bus_type.match))) { 496 put_device(dev); 497 return dev; 498 } 499 } 500 return NULL; 501 } 502 503 static void exynos_drm_unregister_devices(void) 504 { 505 int i; 506 507 for (i = ARRAY_SIZE(exynos_drm_drivers) - 1; i >= 0; --i) { 508 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i]; 509 struct device *dev; 510 511 if (!info->driver || !(info->flags & DRM_VIRTUAL_DEVICE)) 512 continue; 513 514 while ((dev = bus_find_device(&platform_bus_type, NULL, 515 &info->driver->driver, 516 (void *)platform_bus_type.match))) { 517 put_device(dev); 518 platform_device_unregister(to_platform_device(dev)); 519 } 520 } 521 } 522 523 static int exynos_drm_register_devices(void) 524 { 525 struct platform_device *pdev; 526 int i; 527 528 for (i = 0; i < ARRAY_SIZE(exynos_drm_drivers); ++i) { 529 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i]; 530 531 if (!info->driver || !(info->flags & DRM_VIRTUAL_DEVICE)) 532 continue; 533 534 pdev = platform_device_register_simple( 535 info->driver->driver.name, -1, NULL, 0); 536 if (IS_ERR(pdev)) 537 goto fail; 538 } 539 540 return 0; 541 fail: 542 exynos_drm_unregister_devices(); 543 return PTR_ERR(pdev); 544 } 545 546 static void exynos_drm_unregister_drivers(void) 547 { 548 int i; 549 550 for (i = ARRAY_SIZE(exynos_drm_drivers) - 1; i >= 0; --i) { 551 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i]; 552 553 if (!info->driver) 554 continue; 555 556 platform_driver_unregister(info->driver); 557 } 558 } 559 560 static int exynos_drm_register_drivers(void) 561 { 562 int i, ret; 563 564 for (i = 0; i < ARRAY_SIZE(exynos_drm_drivers); ++i) { 565 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i]; 566 567 if (!info->driver) 568 continue; 569 570 ret = platform_driver_register(info->driver); 571 if (ret) 572 goto fail; 573 } 574 return 0; 575 fail: 576 exynos_drm_unregister_drivers(); 577 return ret; 578 } 579 580 static int exynos_drm_init(void) 581 { 582 int ret; 583 584 ret = exynos_drm_register_devices(); 585 if (ret) 586 return ret; 587 588 ret = exynos_drm_register_drivers(); 589 if (ret) 590 goto err_unregister_pdevs; 591 592 return 0; 593 594 err_unregister_pdevs: 595 exynos_drm_unregister_devices(); 596 597 return ret; 598 } 599 600 static void exynos_drm_exit(void) 601 { 602 exynos_drm_unregister_drivers(); 603 exynos_drm_unregister_devices(); 604 } 605 606 module_init(exynos_drm_init); 607 module_exit(exynos_drm_exit); 608 609 MODULE_AUTHOR("Inki Dae <inki.dae@samsung.com>"); 610 MODULE_AUTHOR("Joonyoung Shim <jy0922.shim@samsung.com>"); 611 MODULE_AUTHOR("Seung-Woo Kim <sw0312.kim@samsung.com>"); 612 MODULE_DESCRIPTION("Samsung SoC DRM Driver"); 613 MODULE_LICENSE("GPL"); 614