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_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_g2d.h" 31 #include "exynos_drm_ipp.h" 32 #include "exynos_drm_iommu.h" 33 34 #define DRIVER_NAME "exynos" 35 #define DRIVER_DESC "Samsung SoC DRM" 36 #define DRIVER_DATE "20110530" 37 #define DRIVER_MAJOR 1 38 #define DRIVER_MINOR 0 39 40 static struct device *exynos_drm_get_dma_device(void); 41 42 int exynos_atomic_check(struct drm_device *dev, 43 struct drm_atomic_state *state) 44 { 45 int ret; 46 47 ret = drm_atomic_helper_check_modeset(dev, state); 48 if (ret) 49 return ret; 50 51 ret = drm_atomic_normalize_zpos(dev, state); 52 if (ret) 53 return ret; 54 55 ret = drm_atomic_helper_check_planes(dev, state); 56 if (ret) 57 return ret; 58 59 return ret; 60 } 61 62 static int exynos_drm_open(struct drm_device *dev, struct drm_file *file) 63 { 64 struct drm_exynos_file_private *file_priv; 65 int ret; 66 67 file_priv = kzalloc(sizeof(*file_priv), GFP_KERNEL); 68 if (!file_priv) 69 return -ENOMEM; 70 71 file->driver_priv = file_priv; 72 73 ret = exynos_drm_subdrv_open(dev, file); 74 if (ret) 75 goto err_file_priv_free; 76 77 return ret; 78 79 err_file_priv_free: 80 kfree(file_priv); 81 file->driver_priv = NULL; 82 return ret; 83 } 84 85 static void exynos_drm_postclose(struct drm_device *dev, struct drm_file *file) 86 { 87 exynos_drm_subdrv_close(dev, file); 88 kfree(file->driver_priv); 89 file->driver_priv = NULL; 90 } 91 92 static void exynos_drm_lastclose(struct drm_device *dev) 93 { 94 exynos_drm_fbdev_restore_mode(dev); 95 } 96 97 static const struct vm_operations_struct exynos_drm_gem_vm_ops = { 98 .fault = exynos_drm_gem_fault, 99 .open = drm_gem_vm_open, 100 .close = drm_gem_vm_close, 101 }; 102 103 static const struct drm_ioctl_desc exynos_ioctls[] = { 104 DRM_IOCTL_DEF_DRV(EXYNOS_GEM_CREATE, exynos_drm_gem_create_ioctl, 105 DRM_AUTH | DRM_RENDER_ALLOW), 106 DRM_IOCTL_DEF_DRV(EXYNOS_GEM_MAP, exynos_drm_gem_map_ioctl, 107 DRM_AUTH | DRM_RENDER_ALLOW), 108 DRM_IOCTL_DEF_DRV(EXYNOS_GEM_GET, exynos_drm_gem_get_ioctl, 109 DRM_RENDER_ALLOW), 110 DRM_IOCTL_DEF_DRV(EXYNOS_VIDI_CONNECTION, vidi_connection_ioctl, 111 DRM_AUTH), 112 DRM_IOCTL_DEF_DRV(EXYNOS_G2D_GET_VER, exynos_g2d_get_ver_ioctl, 113 DRM_AUTH | DRM_RENDER_ALLOW), 114 DRM_IOCTL_DEF_DRV(EXYNOS_G2D_SET_CMDLIST, exynos_g2d_set_cmdlist_ioctl, 115 DRM_AUTH | DRM_RENDER_ALLOW), 116 DRM_IOCTL_DEF_DRV(EXYNOS_G2D_EXEC, exynos_g2d_exec_ioctl, 117 DRM_AUTH | DRM_RENDER_ALLOW), 118 DRM_IOCTL_DEF_DRV(EXYNOS_IPP_GET_PROPERTY, exynos_drm_ipp_get_property, 119 DRM_AUTH | DRM_RENDER_ALLOW), 120 DRM_IOCTL_DEF_DRV(EXYNOS_IPP_SET_PROPERTY, exynos_drm_ipp_set_property, 121 DRM_AUTH | DRM_RENDER_ALLOW), 122 DRM_IOCTL_DEF_DRV(EXYNOS_IPP_QUEUE_BUF, exynos_drm_ipp_queue_buf, 123 DRM_AUTH | DRM_RENDER_ALLOW), 124 DRM_IOCTL_DEF_DRV(EXYNOS_IPP_CMD_CTRL, exynos_drm_ipp_cmd_ctrl, 125 DRM_AUTH | DRM_RENDER_ALLOW), 126 }; 127 128 static const struct file_operations exynos_drm_driver_fops = { 129 .owner = THIS_MODULE, 130 .open = drm_open, 131 .mmap = exynos_drm_gem_mmap, 132 .poll = drm_poll, 133 .read = drm_read, 134 .unlocked_ioctl = drm_ioctl, 135 .compat_ioctl = drm_compat_ioctl, 136 .release = drm_release, 137 }; 138 139 static struct drm_driver exynos_drm_driver = { 140 .driver_features = DRIVER_MODESET | DRIVER_GEM | DRIVER_PRIME 141 | DRIVER_ATOMIC | DRIVER_RENDER, 142 .open = exynos_drm_open, 143 .lastclose = exynos_drm_lastclose, 144 .postclose = exynos_drm_postclose, 145 .gem_free_object_unlocked = exynos_drm_gem_free_object, 146 .gem_vm_ops = &exynos_drm_gem_vm_ops, 147 .dumb_create = exynos_drm_gem_dumb_create, 148 .prime_handle_to_fd = drm_gem_prime_handle_to_fd, 149 .prime_fd_to_handle = drm_gem_prime_fd_to_handle, 150 .gem_prime_export = drm_gem_prime_export, 151 .gem_prime_import = drm_gem_prime_import, 152 .gem_prime_get_sg_table = exynos_drm_gem_prime_get_sg_table, 153 .gem_prime_import_sg_table = exynos_drm_gem_prime_import_sg_table, 154 .gem_prime_vmap = exynos_drm_gem_prime_vmap, 155 .gem_prime_vunmap = exynos_drm_gem_prime_vunmap, 156 .gem_prime_mmap = exynos_drm_gem_prime_mmap, 157 .ioctls = exynos_ioctls, 158 .num_ioctls = ARRAY_SIZE(exynos_ioctls), 159 .fops = &exynos_drm_driver_fops, 160 .name = DRIVER_NAME, 161 .desc = DRIVER_DESC, 162 .date = DRIVER_DATE, 163 .major = DRIVER_MAJOR, 164 .minor = DRIVER_MINOR, 165 }; 166 167 #ifdef CONFIG_PM_SLEEP 168 static int exynos_drm_suspend(struct device *dev) 169 { 170 struct drm_device *drm_dev = dev_get_drvdata(dev); 171 struct drm_connector *connector; 172 struct drm_connector_list_iter conn_iter; 173 174 if (pm_runtime_suspended(dev) || !drm_dev) 175 return 0; 176 177 drm_connector_list_iter_begin(drm_dev, &conn_iter); 178 drm_for_each_connector_iter(connector, &conn_iter) { 179 int old_dpms = connector->dpms; 180 181 if (connector->funcs->dpms) 182 connector->funcs->dpms(connector, DRM_MODE_DPMS_OFF); 183 184 /* Set the old mode back to the connector for resume */ 185 connector->dpms = old_dpms; 186 } 187 drm_connector_list_iter_end(&conn_iter); 188 189 return 0; 190 } 191 192 static int exynos_drm_resume(struct device *dev) 193 { 194 struct drm_device *drm_dev = dev_get_drvdata(dev); 195 struct drm_connector *connector; 196 struct drm_connector_list_iter conn_iter; 197 198 if (pm_runtime_suspended(dev) || !drm_dev) 199 return 0; 200 201 drm_connector_list_iter_begin(drm_dev, &conn_iter); 202 drm_for_each_connector_iter(connector, &conn_iter) { 203 if (connector->funcs->dpms) { 204 int dpms = connector->dpms; 205 206 connector->dpms = DRM_MODE_DPMS_OFF; 207 connector->funcs->dpms(connector, dpms); 208 } 209 } 210 drm_connector_list_iter_end(&conn_iter); 211 212 return 0; 213 } 214 #endif 215 216 static const struct dev_pm_ops exynos_drm_pm_ops = { 217 SET_SYSTEM_SLEEP_PM_OPS(exynos_drm_suspend, exynos_drm_resume) 218 }; 219 220 /* forward declaration */ 221 static struct platform_driver exynos_drm_platform_driver; 222 223 struct exynos_drm_driver_info { 224 struct platform_driver *driver; 225 unsigned int flags; 226 }; 227 228 #define DRM_COMPONENT_DRIVER BIT(0) /* supports component framework */ 229 #define DRM_VIRTUAL_DEVICE BIT(1) /* create virtual platform device */ 230 #define DRM_DMA_DEVICE BIT(2) /* can be used for dma allocations */ 231 232 #define DRV_PTR(drv, cond) (IS_ENABLED(cond) ? &drv : NULL) 233 234 /* 235 * Connector drivers should not be placed before associated crtc drivers, 236 * because connector requires pipe number of its crtc during initialization. 237 */ 238 static struct exynos_drm_driver_info exynos_drm_drivers[] = { 239 { 240 DRV_PTR(fimd_driver, CONFIG_DRM_EXYNOS_FIMD), 241 DRM_COMPONENT_DRIVER | DRM_DMA_DEVICE 242 }, { 243 DRV_PTR(exynos5433_decon_driver, CONFIG_DRM_EXYNOS5433_DECON), 244 DRM_COMPONENT_DRIVER | DRM_DMA_DEVICE 245 }, { 246 DRV_PTR(decon_driver, CONFIG_DRM_EXYNOS7_DECON), 247 DRM_COMPONENT_DRIVER | DRM_DMA_DEVICE 248 }, { 249 DRV_PTR(mixer_driver, CONFIG_DRM_EXYNOS_MIXER), 250 DRM_COMPONENT_DRIVER | DRM_DMA_DEVICE 251 }, { 252 DRV_PTR(mic_driver, CONFIG_DRM_EXYNOS_MIC), 253 DRM_COMPONENT_DRIVER 254 }, { 255 DRV_PTR(dp_driver, CONFIG_DRM_EXYNOS_DP), 256 DRM_COMPONENT_DRIVER 257 }, { 258 DRV_PTR(dsi_driver, CONFIG_DRM_EXYNOS_DSI), 259 DRM_COMPONENT_DRIVER 260 }, { 261 DRV_PTR(hdmi_driver, CONFIG_DRM_EXYNOS_HDMI), 262 DRM_COMPONENT_DRIVER 263 }, { 264 DRV_PTR(vidi_driver, CONFIG_DRM_EXYNOS_VIDI), 265 DRM_COMPONENT_DRIVER | DRM_VIRTUAL_DEVICE 266 }, { 267 DRV_PTR(g2d_driver, CONFIG_DRM_EXYNOS_G2D), 268 }, { 269 DRV_PTR(fimc_driver, CONFIG_DRM_EXYNOS_FIMC), 270 }, { 271 DRV_PTR(rotator_driver, CONFIG_DRM_EXYNOS_ROTATOR), 272 }, { 273 DRV_PTR(gsc_driver, CONFIG_DRM_EXYNOS_GSC), 274 }, { 275 DRV_PTR(ipp_driver, CONFIG_DRM_EXYNOS_IPP), 276 DRM_VIRTUAL_DEVICE 277 }, { 278 &exynos_drm_platform_driver, 279 DRM_VIRTUAL_DEVICE 280 } 281 }; 282 283 static int compare_dev(struct device *dev, void *data) 284 { 285 return dev == (struct device *)data; 286 } 287 288 static struct component_match *exynos_drm_match_add(struct device *dev) 289 { 290 struct component_match *match = NULL; 291 int i; 292 293 for (i = 0; i < ARRAY_SIZE(exynos_drm_drivers); ++i) { 294 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i]; 295 struct device *p = NULL, *d; 296 297 if (!info->driver || !(info->flags & DRM_COMPONENT_DRIVER)) 298 continue; 299 300 while ((d = bus_find_device(&platform_bus_type, p, 301 &info->driver->driver, 302 (void *)platform_bus_type.match))) { 303 put_device(p); 304 component_match_add(dev, &match, compare_dev, d); 305 p = d; 306 } 307 put_device(p); 308 } 309 310 return match ?: ERR_PTR(-ENODEV); 311 } 312 313 static int exynos_drm_bind(struct device *dev) 314 { 315 struct exynos_drm_private *private; 316 struct drm_encoder *encoder; 317 struct drm_device *drm; 318 unsigned int clone_mask; 319 int cnt, ret; 320 321 drm = drm_dev_alloc(&exynos_drm_driver, dev); 322 if (IS_ERR(drm)) 323 return PTR_ERR(drm); 324 325 private = kzalloc(sizeof(struct exynos_drm_private), GFP_KERNEL); 326 if (!private) { 327 ret = -ENOMEM; 328 goto err_free_drm; 329 } 330 331 init_waitqueue_head(&private->wait); 332 spin_lock_init(&private->lock); 333 334 dev_set_drvdata(dev, drm); 335 drm->dev_private = (void *)private; 336 337 /* the first real CRTC device is used for all dma mapping operations */ 338 private->dma_dev = exynos_drm_get_dma_device(); 339 if (!private->dma_dev) { 340 DRM_ERROR("no device found for DMA mapping operations.\n"); 341 ret = -ENODEV; 342 goto err_free_private; 343 } 344 DRM_INFO("Exynos DRM: using %s device for DMA mapping operations\n", 345 dev_name(private->dma_dev)); 346 347 /* create common IOMMU mapping for all devices attached to Exynos DRM */ 348 ret = drm_create_iommu_mapping(drm); 349 if (ret < 0) { 350 DRM_ERROR("failed to create iommu mapping.\n"); 351 goto err_free_private; 352 } 353 354 drm_mode_config_init(drm); 355 356 exynos_drm_mode_config_init(drm); 357 358 /* setup possible_clones. */ 359 cnt = 0; 360 clone_mask = 0; 361 list_for_each_entry(encoder, &drm->mode_config.encoder_list, head) 362 clone_mask |= (1 << (cnt++)); 363 364 list_for_each_entry(encoder, &drm->mode_config.encoder_list, head) 365 encoder->possible_clones = clone_mask; 366 367 /* Try to bind all sub drivers. */ 368 ret = component_bind_all(drm->dev, drm); 369 if (ret) 370 goto err_mode_config_cleanup; 371 372 ret = drm_vblank_init(drm, drm->mode_config.num_crtc); 373 if (ret) 374 goto err_unbind_all; 375 376 /* Probe non kms sub drivers and virtual display driver. */ 377 ret = exynos_drm_device_subdrv_probe(drm); 378 if (ret) 379 goto err_unbind_all; 380 381 drm_mode_config_reset(drm); 382 383 /* 384 * enable drm irq mode. 385 * - with irq_enabled = true, we can use the vblank feature. 386 * 387 * P.S. note that we wouldn't use drm irq handler but 388 * just specific driver own one instead because 389 * drm framework supports only one irq handler. 390 */ 391 drm->irq_enabled = true; 392 393 /* init kms poll for handling hpd */ 394 drm_kms_helper_poll_init(drm); 395 396 ret = exynos_drm_fbdev_init(drm); 397 if (ret) 398 goto err_cleanup_poll; 399 400 /* register the DRM device */ 401 ret = drm_dev_register(drm, 0); 402 if (ret < 0) 403 goto err_cleanup_fbdev; 404 405 return 0; 406 407 err_cleanup_fbdev: 408 exynos_drm_fbdev_fini(drm); 409 err_cleanup_poll: 410 drm_kms_helper_poll_fini(drm); 411 exynos_drm_device_subdrv_remove(drm); 412 err_unbind_all: 413 component_unbind_all(drm->dev, drm); 414 err_mode_config_cleanup: 415 drm_mode_config_cleanup(drm); 416 drm_release_iommu_mapping(drm); 417 err_free_private: 418 kfree(private); 419 err_free_drm: 420 drm_dev_unref(drm); 421 422 return ret; 423 } 424 425 static void exynos_drm_unbind(struct device *dev) 426 { 427 struct drm_device *drm = dev_get_drvdata(dev); 428 429 drm_dev_unregister(drm); 430 431 exynos_drm_device_subdrv_remove(drm); 432 433 exynos_drm_fbdev_fini(drm); 434 drm_kms_helper_poll_fini(drm); 435 436 component_unbind_all(drm->dev, drm); 437 drm_mode_config_cleanup(drm); 438 drm_release_iommu_mapping(drm); 439 440 kfree(drm->dev_private); 441 drm->dev_private = NULL; 442 443 drm_dev_unref(drm); 444 } 445 446 static const struct component_master_ops exynos_drm_ops = { 447 .bind = exynos_drm_bind, 448 .unbind = exynos_drm_unbind, 449 }; 450 451 static int exynos_drm_platform_probe(struct platform_device *pdev) 452 { 453 struct component_match *match; 454 455 pdev->dev.coherent_dma_mask = DMA_BIT_MASK(32); 456 457 match = exynos_drm_match_add(&pdev->dev); 458 if (IS_ERR(match)) 459 return PTR_ERR(match); 460 461 return component_master_add_with_match(&pdev->dev, &exynos_drm_ops, 462 match); 463 } 464 465 static int exynos_drm_platform_remove(struct platform_device *pdev) 466 { 467 component_master_del(&pdev->dev, &exynos_drm_ops); 468 return 0; 469 } 470 471 static struct platform_driver exynos_drm_platform_driver = { 472 .probe = exynos_drm_platform_probe, 473 .remove = exynos_drm_platform_remove, 474 .driver = { 475 .name = "exynos-drm", 476 .pm = &exynos_drm_pm_ops, 477 }, 478 }; 479 480 static struct device *exynos_drm_get_dma_device(void) 481 { 482 int i; 483 484 for (i = 0; i < ARRAY_SIZE(exynos_drm_drivers); ++i) { 485 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i]; 486 struct device *dev; 487 488 if (!info->driver || !(info->flags & DRM_DMA_DEVICE)) 489 continue; 490 491 while ((dev = bus_find_device(&platform_bus_type, NULL, 492 &info->driver->driver, 493 (void *)platform_bus_type.match))) { 494 put_device(dev); 495 return dev; 496 } 497 } 498 return NULL; 499 } 500 501 static void exynos_drm_unregister_devices(void) 502 { 503 int i; 504 505 for (i = ARRAY_SIZE(exynos_drm_drivers) - 1; i >= 0; --i) { 506 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i]; 507 struct device *dev; 508 509 if (!info->driver || !(info->flags & DRM_VIRTUAL_DEVICE)) 510 continue; 511 512 while ((dev = bus_find_device(&platform_bus_type, NULL, 513 &info->driver->driver, 514 (void *)platform_bus_type.match))) { 515 put_device(dev); 516 platform_device_unregister(to_platform_device(dev)); 517 } 518 } 519 } 520 521 static int exynos_drm_register_devices(void) 522 { 523 struct platform_device *pdev; 524 int i; 525 526 for (i = 0; i < ARRAY_SIZE(exynos_drm_drivers); ++i) { 527 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i]; 528 529 if (!info->driver || !(info->flags & DRM_VIRTUAL_DEVICE)) 530 continue; 531 532 pdev = platform_device_register_simple( 533 info->driver->driver.name, -1, NULL, 0); 534 if (IS_ERR(pdev)) 535 goto fail; 536 } 537 538 return 0; 539 fail: 540 exynos_drm_unregister_devices(); 541 return PTR_ERR(pdev); 542 } 543 544 static void exynos_drm_unregister_drivers(void) 545 { 546 int i; 547 548 for (i = ARRAY_SIZE(exynos_drm_drivers) - 1; i >= 0; --i) { 549 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i]; 550 551 if (!info->driver) 552 continue; 553 554 platform_driver_unregister(info->driver); 555 } 556 } 557 558 static int exynos_drm_register_drivers(void) 559 { 560 int i, ret; 561 562 for (i = 0; i < ARRAY_SIZE(exynos_drm_drivers); ++i) { 563 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i]; 564 565 if (!info->driver) 566 continue; 567 568 ret = platform_driver_register(info->driver); 569 if (ret) 570 goto fail; 571 } 572 return 0; 573 fail: 574 exynos_drm_unregister_drivers(); 575 return ret; 576 } 577 578 static int exynos_drm_init(void) 579 { 580 int ret; 581 582 ret = exynos_drm_register_devices(); 583 if (ret) 584 return ret; 585 586 ret = exynos_drm_register_drivers(); 587 if (ret) 588 goto err_unregister_pdevs; 589 590 return 0; 591 592 err_unregister_pdevs: 593 exynos_drm_unregister_devices(); 594 595 return ret; 596 } 597 598 static void exynos_drm_exit(void) 599 { 600 exynos_drm_unregister_drivers(); 601 exynos_drm_unregister_devices(); 602 } 603 604 module_init(exynos_drm_init); 605 module_exit(exynos_drm_exit); 606 607 MODULE_AUTHOR("Inki Dae <inki.dae@samsung.com>"); 608 MODULE_AUTHOR("Joonyoung Shim <jy0922.shim@samsung.com>"); 609 MODULE_AUTHOR("Seung-Woo Kim <sw0312.kim@samsung.com>"); 610 MODULE_DESCRIPTION("Samsung SoC DRM Driver"); 611 MODULE_LICENSE("GPL"); 612