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 exynos_drm_private *private = drm_dev->dev_private; 172 173 if (pm_runtime_suspended(dev) || !drm_dev) 174 return 0; 175 176 drm_kms_helper_poll_disable(drm_dev); 177 exynos_drm_fbdev_suspend(drm_dev); 178 private->suspend_state = drm_atomic_helper_suspend(drm_dev); 179 if (IS_ERR(private->suspend_state)) { 180 exynos_drm_fbdev_resume(drm_dev); 181 drm_kms_helper_poll_enable(drm_dev); 182 return PTR_ERR(private->suspend_state); 183 } 184 185 return 0; 186 } 187 188 static int exynos_drm_resume(struct device *dev) 189 { 190 struct drm_device *drm_dev = dev_get_drvdata(dev); 191 struct exynos_drm_private *private = drm_dev->dev_private; 192 193 if (pm_runtime_suspended(dev) || !drm_dev) 194 return 0; 195 196 drm_atomic_helper_resume(drm_dev, private->suspend_state); 197 exynos_drm_fbdev_resume(drm_dev); 198 drm_kms_helper_poll_enable(drm_dev); 199 200 return 0; 201 } 202 #endif 203 204 static const struct dev_pm_ops exynos_drm_pm_ops = { 205 SET_SYSTEM_SLEEP_PM_OPS(exynos_drm_suspend, exynos_drm_resume) 206 }; 207 208 /* forward declaration */ 209 static struct platform_driver exynos_drm_platform_driver; 210 211 struct exynos_drm_driver_info { 212 struct platform_driver *driver; 213 unsigned int flags; 214 }; 215 216 #define DRM_COMPONENT_DRIVER BIT(0) /* supports component framework */ 217 #define DRM_VIRTUAL_DEVICE BIT(1) /* create virtual platform device */ 218 #define DRM_DMA_DEVICE BIT(2) /* can be used for dma allocations */ 219 220 #define DRV_PTR(drv, cond) (IS_ENABLED(cond) ? &drv : NULL) 221 222 /* 223 * Connector drivers should not be placed before associated crtc drivers, 224 * because connector requires pipe number of its crtc during initialization. 225 */ 226 static struct exynos_drm_driver_info exynos_drm_drivers[] = { 227 { 228 DRV_PTR(fimd_driver, CONFIG_DRM_EXYNOS_FIMD), 229 DRM_COMPONENT_DRIVER | DRM_DMA_DEVICE 230 }, { 231 DRV_PTR(exynos5433_decon_driver, CONFIG_DRM_EXYNOS5433_DECON), 232 DRM_COMPONENT_DRIVER | DRM_DMA_DEVICE 233 }, { 234 DRV_PTR(decon_driver, CONFIG_DRM_EXYNOS7_DECON), 235 DRM_COMPONENT_DRIVER | DRM_DMA_DEVICE 236 }, { 237 DRV_PTR(mixer_driver, CONFIG_DRM_EXYNOS_MIXER), 238 DRM_COMPONENT_DRIVER | DRM_DMA_DEVICE 239 }, { 240 DRV_PTR(mic_driver, CONFIG_DRM_EXYNOS_MIC), 241 DRM_COMPONENT_DRIVER 242 }, { 243 DRV_PTR(dp_driver, CONFIG_DRM_EXYNOS_DP), 244 DRM_COMPONENT_DRIVER 245 }, { 246 DRV_PTR(dsi_driver, CONFIG_DRM_EXYNOS_DSI), 247 DRM_COMPONENT_DRIVER 248 }, { 249 DRV_PTR(hdmi_driver, CONFIG_DRM_EXYNOS_HDMI), 250 DRM_COMPONENT_DRIVER 251 }, { 252 DRV_PTR(vidi_driver, CONFIG_DRM_EXYNOS_VIDI), 253 DRM_COMPONENT_DRIVER | DRM_VIRTUAL_DEVICE 254 }, { 255 DRV_PTR(g2d_driver, CONFIG_DRM_EXYNOS_G2D), 256 }, { 257 DRV_PTR(fimc_driver, CONFIG_DRM_EXYNOS_FIMC), 258 }, { 259 DRV_PTR(rotator_driver, CONFIG_DRM_EXYNOS_ROTATOR), 260 }, { 261 DRV_PTR(gsc_driver, CONFIG_DRM_EXYNOS_GSC), 262 }, { 263 DRV_PTR(ipp_driver, CONFIG_DRM_EXYNOS_IPP), 264 DRM_VIRTUAL_DEVICE 265 }, { 266 &exynos_drm_platform_driver, 267 DRM_VIRTUAL_DEVICE 268 } 269 }; 270 271 static int compare_dev(struct device *dev, void *data) 272 { 273 return dev == (struct device *)data; 274 } 275 276 static struct component_match *exynos_drm_match_add(struct device *dev) 277 { 278 struct component_match *match = NULL; 279 int i; 280 281 for (i = 0; i < ARRAY_SIZE(exynos_drm_drivers); ++i) { 282 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i]; 283 struct device *p = NULL, *d; 284 285 if (!info->driver || !(info->flags & DRM_COMPONENT_DRIVER)) 286 continue; 287 288 while ((d = bus_find_device(&platform_bus_type, p, 289 &info->driver->driver, 290 (void *)platform_bus_type.match))) { 291 put_device(p); 292 component_match_add(dev, &match, compare_dev, d); 293 p = d; 294 } 295 put_device(p); 296 } 297 298 return match ?: ERR_PTR(-ENODEV); 299 } 300 301 static int exynos_drm_bind(struct device *dev) 302 { 303 struct exynos_drm_private *private; 304 struct drm_encoder *encoder; 305 struct drm_device *drm; 306 unsigned int clone_mask; 307 int cnt, ret; 308 309 drm = drm_dev_alloc(&exynos_drm_driver, dev); 310 if (IS_ERR(drm)) 311 return PTR_ERR(drm); 312 313 private = kzalloc(sizeof(struct exynos_drm_private), GFP_KERNEL); 314 if (!private) { 315 ret = -ENOMEM; 316 goto err_free_drm; 317 } 318 319 init_waitqueue_head(&private->wait); 320 spin_lock_init(&private->lock); 321 322 dev_set_drvdata(dev, drm); 323 drm->dev_private = (void *)private; 324 325 /* the first real CRTC device is used for all dma mapping operations */ 326 private->dma_dev = exynos_drm_get_dma_device(); 327 if (!private->dma_dev) { 328 DRM_ERROR("no device found for DMA mapping operations.\n"); 329 ret = -ENODEV; 330 goto err_free_private; 331 } 332 DRM_INFO("Exynos DRM: using %s device for DMA mapping operations\n", 333 dev_name(private->dma_dev)); 334 335 /* create common IOMMU mapping for all devices attached to Exynos DRM */ 336 ret = drm_create_iommu_mapping(drm); 337 if (ret < 0) { 338 DRM_ERROR("failed to create iommu mapping.\n"); 339 goto err_free_private; 340 } 341 342 drm_mode_config_init(drm); 343 344 exynos_drm_mode_config_init(drm); 345 346 /* setup possible_clones. */ 347 cnt = 0; 348 clone_mask = 0; 349 list_for_each_entry(encoder, &drm->mode_config.encoder_list, head) 350 clone_mask |= (1 << (cnt++)); 351 352 list_for_each_entry(encoder, &drm->mode_config.encoder_list, head) 353 encoder->possible_clones = clone_mask; 354 355 /* Try to bind all sub drivers. */ 356 ret = component_bind_all(drm->dev, drm); 357 if (ret) 358 goto err_mode_config_cleanup; 359 360 ret = drm_vblank_init(drm, drm->mode_config.num_crtc); 361 if (ret) 362 goto err_unbind_all; 363 364 /* Probe non kms sub drivers and virtual display driver. */ 365 ret = exynos_drm_device_subdrv_probe(drm); 366 if (ret) 367 goto err_unbind_all; 368 369 drm_mode_config_reset(drm); 370 371 /* 372 * enable drm irq mode. 373 * - with irq_enabled = true, we can use the vblank feature. 374 * 375 * P.S. note that we wouldn't use drm irq handler but 376 * just specific driver own one instead because 377 * drm framework supports only one irq handler. 378 */ 379 drm->irq_enabled = true; 380 381 /* init kms poll for handling hpd */ 382 drm_kms_helper_poll_init(drm); 383 384 ret = exynos_drm_fbdev_init(drm); 385 if (ret) 386 goto err_cleanup_poll; 387 388 /* register the DRM device */ 389 ret = drm_dev_register(drm, 0); 390 if (ret < 0) 391 goto err_cleanup_fbdev; 392 393 return 0; 394 395 err_cleanup_fbdev: 396 exynos_drm_fbdev_fini(drm); 397 err_cleanup_poll: 398 drm_kms_helper_poll_fini(drm); 399 exynos_drm_device_subdrv_remove(drm); 400 err_unbind_all: 401 component_unbind_all(drm->dev, drm); 402 err_mode_config_cleanup: 403 drm_mode_config_cleanup(drm); 404 drm_release_iommu_mapping(drm); 405 err_free_private: 406 kfree(private); 407 err_free_drm: 408 drm_dev_unref(drm); 409 410 return ret; 411 } 412 413 static void exynos_drm_unbind(struct device *dev) 414 { 415 struct drm_device *drm = dev_get_drvdata(dev); 416 417 drm_dev_unregister(drm); 418 419 exynos_drm_device_subdrv_remove(drm); 420 421 exynos_drm_fbdev_fini(drm); 422 drm_kms_helper_poll_fini(drm); 423 424 component_unbind_all(drm->dev, drm); 425 drm_mode_config_cleanup(drm); 426 drm_release_iommu_mapping(drm); 427 428 kfree(drm->dev_private); 429 drm->dev_private = NULL; 430 431 drm_dev_unref(drm); 432 } 433 434 static const struct component_master_ops exynos_drm_ops = { 435 .bind = exynos_drm_bind, 436 .unbind = exynos_drm_unbind, 437 }; 438 439 static int exynos_drm_platform_probe(struct platform_device *pdev) 440 { 441 struct component_match *match; 442 443 pdev->dev.coherent_dma_mask = DMA_BIT_MASK(32); 444 445 match = exynos_drm_match_add(&pdev->dev); 446 if (IS_ERR(match)) 447 return PTR_ERR(match); 448 449 return component_master_add_with_match(&pdev->dev, &exynos_drm_ops, 450 match); 451 } 452 453 static int exynos_drm_platform_remove(struct platform_device *pdev) 454 { 455 component_master_del(&pdev->dev, &exynos_drm_ops); 456 return 0; 457 } 458 459 static struct platform_driver exynos_drm_platform_driver = { 460 .probe = exynos_drm_platform_probe, 461 .remove = exynos_drm_platform_remove, 462 .driver = { 463 .name = "exynos-drm", 464 .pm = &exynos_drm_pm_ops, 465 }, 466 }; 467 468 static struct device *exynos_drm_get_dma_device(void) 469 { 470 int i; 471 472 for (i = 0; i < ARRAY_SIZE(exynos_drm_drivers); ++i) { 473 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i]; 474 struct device *dev; 475 476 if (!info->driver || !(info->flags & DRM_DMA_DEVICE)) 477 continue; 478 479 while ((dev = bus_find_device(&platform_bus_type, NULL, 480 &info->driver->driver, 481 (void *)platform_bus_type.match))) { 482 put_device(dev); 483 return dev; 484 } 485 } 486 return NULL; 487 } 488 489 static void exynos_drm_unregister_devices(void) 490 { 491 int i; 492 493 for (i = ARRAY_SIZE(exynos_drm_drivers) - 1; i >= 0; --i) { 494 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i]; 495 struct device *dev; 496 497 if (!info->driver || !(info->flags & DRM_VIRTUAL_DEVICE)) 498 continue; 499 500 while ((dev = bus_find_device(&platform_bus_type, NULL, 501 &info->driver->driver, 502 (void *)platform_bus_type.match))) { 503 put_device(dev); 504 platform_device_unregister(to_platform_device(dev)); 505 } 506 } 507 } 508 509 static int exynos_drm_register_devices(void) 510 { 511 struct platform_device *pdev; 512 int i; 513 514 for (i = 0; i < ARRAY_SIZE(exynos_drm_drivers); ++i) { 515 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i]; 516 517 if (!info->driver || !(info->flags & DRM_VIRTUAL_DEVICE)) 518 continue; 519 520 pdev = platform_device_register_simple( 521 info->driver->driver.name, -1, NULL, 0); 522 if (IS_ERR(pdev)) 523 goto fail; 524 } 525 526 return 0; 527 fail: 528 exynos_drm_unregister_devices(); 529 return PTR_ERR(pdev); 530 } 531 532 static void exynos_drm_unregister_drivers(void) 533 { 534 int i; 535 536 for (i = ARRAY_SIZE(exynos_drm_drivers) - 1; i >= 0; --i) { 537 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i]; 538 539 if (!info->driver) 540 continue; 541 542 platform_driver_unregister(info->driver); 543 } 544 } 545 546 static int exynos_drm_register_drivers(void) 547 { 548 int i, ret; 549 550 for (i = 0; i < ARRAY_SIZE(exynos_drm_drivers); ++i) { 551 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i]; 552 553 if (!info->driver) 554 continue; 555 556 ret = platform_driver_register(info->driver); 557 if (ret) 558 goto fail; 559 } 560 return 0; 561 fail: 562 exynos_drm_unregister_drivers(); 563 return ret; 564 } 565 566 static int exynos_drm_init(void) 567 { 568 int ret; 569 570 ret = exynos_drm_register_devices(); 571 if (ret) 572 return ret; 573 574 ret = exynos_drm_register_drivers(); 575 if (ret) 576 goto err_unregister_pdevs; 577 578 return 0; 579 580 err_unregister_pdevs: 581 exynos_drm_unregister_devices(); 582 583 return ret; 584 } 585 586 static void exynos_drm_exit(void) 587 { 588 exynos_drm_unregister_drivers(); 589 exynos_drm_unregister_devices(); 590 } 591 592 module_init(exynos_drm_init); 593 module_exit(exynos_drm_exit); 594 595 MODULE_AUTHOR("Inki Dae <inki.dae@samsung.com>"); 596 MODULE_AUTHOR("Joonyoung Shim <jy0922.shim@samsung.com>"); 597 MODULE_AUTHOR("Seung-Woo Kim <sw0312.kim@samsung.com>"); 598 MODULE_DESCRIPTION("Samsung SoC DRM Driver"); 599 MODULE_LICENSE("GPL"); 600