1 /* 2 * Copyright (c) 2015 MediaTek Inc. 3 * Author: YT SHEN <yt.shen@mediatek.com> 4 * 5 * This program is free software; you can redistribute it and/or modify 6 * it under the terms of the GNU General Public License version 2 as 7 * published by the Free Software Foundation. 8 * 9 * This program is distributed in the hope that it will be useful, 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 * GNU General Public License for more details. 13 */ 14 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 #include <drm/drm_gem.h> 20 #include <drm/drm_gem_cma_helper.h> 21 #include <linux/component.h> 22 #include <linux/iommu.h> 23 #include <linux/of_address.h> 24 #include <linux/of_platform.h> 25 #include <linux/pm_runtime.h> 26 27 #include "mtk_drm_crtc.h" 28 #include "mtk_drm_ddp.h" 29 #include "mtk_drm_ddp_comp.h" 30 #include "mtk_drm_drv.h" 31 #include "mtk_drm_fb.h" 32 #include "mtk_drm_gem.h" 33 34 #define DRIVER_NAME "mediatek" 35 #define DRIVER_DESC "Mediatek SoC DRM" 36 #define DRIVER_DATE "20150513" 37 #define DRIVER_MAJOR 1 38 #define DRIVER_MINOR 0 39 40 static void mtk_atomic_schedule(struct mtk_drm_private *private, 41 struct drm_atomic_state *state) 42 { 43 private->commit.state = state; 44 schedule_work(&private->commit.work); 45 } 46 47 static void mtk_atomic_wait_for_fences(struct drm_atomic_state *state) 48 { 49 struct drm_plane *plane; 50 struct drm_plane_state *plane_state; 51 int i; 52 53 for_each_plane_in_state(state, plane, plane_state, i) 54 mtk_fb_wait(plane->state->fb); 55 } 56 57 static void mtk_atomic_complete(struct mtk_drm_private *private, 58 struct drm_atomic_state *state) 59 { 60 struct drm_device *drm = private->drm; 61 62 mtk_atomic_wait_for_fences(state); 63 64 drm_atomic_helper_commit_modeset_disables(drm, state); 65 drm_atomic_helper_commit_planes(drm, state, false); 66 drm_atomic_helper_commit_modeset_enables(drm, state); 67 drm_atomic_helper_wait_for_vblanks(drm, state); 68 drm_atomic_helper_cleanup_planes(drm, state); 69 drm_atomic_state_free(state); 70 } 71 72 static void mtk_atomic_work(struct work_struct *work) 73 { 74 struct mtk_drm_private *private = container_of(work, 75 struct mtk_drm_private, commit.work); 76 77 mtk_atomic_complete(private, private->commit.state); 78 } 79 80 static int mtk_atomic_commit(struct drm_device *drm, 81 struct drm_atomic_state *state, 82 bool async) 83 { 84 struct mtk_drm_private *private = drm->dev_private; 85 int ret; 86 87 ret = drm_atomic_helper_prepare_planes(drm, state); 88 if (ret) 89 return ret; 90 91 mutex_lock(&private->commit.lock); 92 flush_work(&private->commit.work); 93 94 drm_atomic_helper_swap_state(drm, state); 95 96 if (async) 97 mtk_atomic_schedule(private, state); 98 else 99 mtk_atomic_complete(private, state); 100 101 mutex_unlock(&private->commit.lock); 102 103 return 0; 104 } 105 106 static const struct drm_mode_config_funcs mtk_drm_mode_config_funcs = { 107 .fb_create = mtk_drm_mode_fb_create, 108 .atomic_check = drm_atomic_helper_check, 109 .atomic_commit = mtk_atomic_commit, 110 }; 111 112 static const enum mtk_ddp_comp_id mtk_ddp_main[] = { 113 DDP_COMPONENT_OVL0, 114 DDP_COMPONENT_COLOR0, 115 DDP_COMPONENT_AAL, 116 DDP_COMPONENT_OD, 117 DDP_COMPONENT_RDMA0, 118 DDP_COMPONENT_UFOE, 119 DDP_COMPONENT_DSI0, 120 DDP_COMPONENT_PWM0, 121 }; 122 123 static const enum mtk_ddp_comp_id mtk_ddp_ext[] = { 124 DDP_COMPONENT_OVL1, 125 DDP_COMPONENT_COLOR1, 126 DDP_COMPONENT_GAMMA, 127 DDP_COMPONENT_RDMA1, 128 DDP_COMPONENT_DPI0, 129 }; 130 131 static int mtk_drm_kms_init(struct drm_device *drm) 132 { 133 struct mtk_drm_private *private = drm->dev_private; 134 struct platform_device *pdev; 135 struct device_node *np; 136 int ret; 137 138 if (!iommu_present(&platform_bus_type)) 139 return -EPROBE_DEFER; 140 141 pdev = of_find_device_by_node(private->mutex_node); 142 if (!pdev) { 143 dev_err(drm->dev, "Waiting for disp-mutex device %s\n", 144 private->mutex_node->full_name); 145 of_node_put(private->mutex_node); 146 return -EPROBE_DEFER; 147 } 148 private->mutex_dev = &pdev->dev; 149 150 drm_mode_config_init(drm); 151 152 drm->mode_config.min_width = 64; 153 drm->mode_config.min_height = 64; 154 155 /* 156 * set max width and height as default value(4096x4096). 157 * this value would be used to check framebuffer size limitation 158 * at drm_mode_addfb(). 159 */ 160 drm->mode_config.max_width = 4096; 161 drm->mode_config.max_height = 4096; 162 drm->mode_config.funcs = &mtk_drm_mode_config_funcs; 163 164 ret = component_bind_all(drm->dev, drm); 165 if (ret) 166 goto err_config_cleanup; 167 168 /* 169 * We currently support two fixed data streams, each optional, 170 * and each statically assigned to a crtc: 171 * OVL0 -> COLOR0 -> AAL -> OD -> RDMA0 -> UFOE -> DSI0 ... 172 */ 173 ret = mtk_drm_crtc_create(drm, mtk_ddp_main, ARRAY_SIZE(mtk_ddp_main)); 174 if (ret < 0) 175 goto err_component_unbind; 176 /* ... and OVL1 -> COLOR1 -> GAMMA -> RDMA1 -> DPI0. */ 177 ret = mtk_drm_crtc_create(drm, mtk_ddp_ext, ARRAY_SIZE(mtk_ddp_ext)); 178 if (ret < 0) 179 goto err_component_unbind; 180 181 /* Use OVL device for all DMA memory allocations */ 182 np = private->comp_node[mtk_ddp_main[0]] ?: 183 private->comp_node[mtk_ddp_ext[0]]; 184 pdev = of_find_device_by_node(np); 185 if (!pdev) { 186 ret = -ENODEV; 187 dev_err(drm->dev, "Need at least one OVL device\n"); 188 goto err_component_unbind; 189 } 190 191 private->dma_dev = &pdev->dev; 192 193 /* 194 * We don't use the drm_irq_install() helpers provided by the DRM 195 * core, so we need to set this manually in order to allow the 196 * DRM_IOCTL_WAIT_VBLANK to operate correctly. 197 */ 198 drm->irq_enabled = true; 199 ret = drm_vblank_init(drm, MAX_CRTC); 200 if (ret < 0) 201 goto err_component_unbind; 202 203 drm_kms_helper_poll_init(drm); 204 drm_mode_config_reset(drm); 205 206 return 0; 207 208 err_component_unbind: 209 component_unbind_all(drm->dev, drm); 210 err_config_cleanup: 211 drm_mode_config_cleanup(drm); 212 213 return ret; 214 } 215 216 static void mtk_drm_kms_deinit(struct drm_device *drm) 217 { 218 drm_kms_helper_poll_fini(drm); 219 220 drm_vblank_cleanup(drm); 221 component_unbind_all(drm->dev, drm); 222 drm_mode_config_cleanup(drm); 223 } 224 225 static const struct file_operations mtk_drm_fops = { 226 .owner = THIS_MODULE, 227 .open = drm_open, 228 .release = drm_release, 229 .unlocked_ioctl = drm_ioctl, 230 .mmap = mtk_drm_gem_mmap, 231 .poll = drm_poll, 232 .read = drm_read, 233 #ifdef CONFIG_COMPAT 234 .compat_ioctl = drm_compat_ioctl, 235 #endif 236 }; 237 238 static struct drm_driver mtk_drm_driver = { 239 .driver_features = DRIVER_MODESET | DRIVER_GEM | DRIVER_PRIME | 240 DRIVER_ATOMIC, 241 242 .get_vblank_counter = drm_vblank_count, 243 .enable_vblank = mtk_drm_crtc_enable_vblank, 244 .disable_vblank = mtk_drm_crtc_disable_vblank, 245 246 .gem_free_object = mtk_drm_gem_free_object, 247 .gem_vm_ops = &drm_gem_cma_vm_ops, 248 .dumb_create = mtk_drm_gem_dumb_create, 249 .dumb_map_offset = mtk_drm_gem_dumb_map_offset, 250 .dumb_destroy = drm_gem_dumb_destroy, 251 252 .prime_handle_to_fd = drm_gem_prime_handle_to_fd, 253 .prime_fd_to_handle = drm_gem_prime_fd_to_handle, 254 .gem_prime_export = drm_gem_prime_export, 255 .gem_prime_import = drm_gem_prime_import, 256 .gem_prime_get_sg_table = mtk_gem_prime_get_sg_table, 257 .gem_prime_import_sg_table = mtk_gem_prime_import_sg_table, 258 .gem_prime_mmap = mtk_drm_gem_mmap_buf, 259 .fops = &mtk_drm_fops, 260 261 .name = DRIVER_NAME, 262 .desc = DRIVER_DESC, 263 .date = DRIVER_DATE, 264 .major = DRIVER_MAJOR, 265 .minor = DRIVER_MINOR, 266 }; 267 268 static int compare_of(struct device *dev, void *data) 269 { 270 return dev->of_node == data; 271 } 272 273 static int mtk_drm_bind(struct device *dev) 274 { 275 struct mtk_drm_private *private = dev_get_drvdata(dev); 276 struct drm_device *drm; 277 int ret; 278 279 drm = drm_dev_alloc(&mtk_drm_driver, dev); 280 if (!drm) 281 return -ENOMEM; 282 283 drm_dev_set_unique(drm, dev_name(dev)); 284 285 drm->dev_private = private; 286 private->drm = drm; 287 288 ret = mtk_drm_kms_init(drm); 289 if (ret < 0) 290 goto err_free; 291 292 ret = drm_dev_register(drm, 0); 293 if (ret < 0) 294 goto err_deinit; 295 296 ret = drm_connector_register_all(drm); 297 if (ret < 0) 298 goto err_unregister; 299 300 return 0; 301 302 err_unregister: 303 drm_dev_unregister(drm); 304 err_deinit: 305 mtk_drm_kms_deinit(drm); 306 err_free: 307 drm_dev_unref(drm); 308 return ret; 309 } 310 311 static void mtk_drm_unbind(struct device *dev) 312 { 313 struct mtk_drm_private *private = dev_get_drvdata(dev); 314 315 drm_put_dev(private->drm); 316 private->drm = NULL; 317 } 318 319 static const struct component_master_ops mtk_drm_ops = { 320 .bind = mtk_drm_bind, 321 .unbind = mtk_drm_unbind, 322 }; 323 324 static const struct of_device_id mtk_ddp_comp_dt_ids[] = { 325 { .compatible = "mediatek,mt8173-disp-ovl", .data = (void *)MTK_DISP_OVL }, 326 { .compatible = "mediatek,mt8173-disp-rdma", .data = (void *)MTK_DISP_RDMA }, 327 { .compatible = "mediatek,mt8173-disp-wdma", .data = (void *)MTK_DISP_WDMA }, 328 { .compatible = "mediatek,mt8173-disp-color", .data = (void *)MTK_DISP_COLOR }, 329 { .compatible = "mediatek,mt8173-disp-aal", .data = (void *)MTK_DISP_AAL}, 330 { .compatible = "mediatek,mt8173-disp-gamma", .data = (void *)MTK_DISP_GAMMA, }, 331 { .compatible = "mediatek,mt8173-disp-ufoe", .data = (void *)MTK_DISP_UFOE }, 332 { .compatible = "mediatek,mt8173-dsi", .data = (void *)MTK_DSI }, 333 { .compatible = "mediatek,mt8173-dpi", .data = (void *)MTK_DPI }, 334 { .compatible = "mediatek,mt8173-disp-mutex", .data = (void *)MTK_DISP_MUTEX }, 335 { .compatible = "mediatek,mt8173-disp-pwm", .data = (void *)MTK_DISP_PWM }, 336 { .compatible = "mediatek,mt8173-disp-od", .data = (void *)MTK_DISP_OD }, 337 { } 338 }; 339 340 static int mtk_drm_probe(struct platform_device *pdev) 341 { 342 struct device *dev = &pdev->dev; 343 struct mtk_drm_private *private; 344 struct resource *mem; 345 struct device_node *node; 346 struct component_match *match = NULL; 347 int ret; 348 int i; 349 350 private = devm_kzalloc(dev, sizeof(*private), GFP_KERNEL); 351 if (!private) 352 return -ENOMEM; 353 354 mutex_init(&private->commit.lock); 355 INIT_WORK(&private->commit.work, mtk_atomic_work); 356 357 mem = platform_get_resource(pdev, IORESOURCE_MEM, 0); 358 private->config_regs = devm_ioremap_resource(dev, mem); 359 if (IS_ERR(private->config_regs)) { 360 ret = PTR_ERR(private->config_regs); 361 dev_err(dev, "Failed to ioremap mmsys-config resource: %d\n", 362 ret); 363 return ret; 364 } 365 366 /* Iterate over sibling DISP function blocks */ 367 for_each_child_of_node(dev->of_node->parent, node) { 368 const struct of_device_id *of_id; 369 enum mtk_ddp_comp_type comp_type; 370 int comp_id; 371 372 of_id = of_match_node(mtk_ddp_comp_dt_ids, node); 373 if (!of_id) 374 continue; 375 376 if (!of_device_is_available(node)) { 377 dev_dbg(dev, "Skipping disabled component %s\n", 378 node->full_name); 379 continue; 380 } 381 382 comp_type = (enum mtk_ddp_comp_type)of_id->data; 383 384 if (comp_type == MTK_DISP_MUTEX) { 385 private->mutex_node = of_node_get(node); 386 continue; 387 } 388 389 comp_id = mtk_ddp_comp_get_id(node, comp_type); 390 if (comp_id < 0) { 391 dev_warn(dev, "Skipping unknown component %s\n", 392 node->full_name); 393 continue; 394 } 395 396 private->comp_node[comp_id] = of_node_get(node); 397 398 /* 399 * Currently only the OVL, RDMA, DSI, and DPI blocks have 400 * separate component platform drivers and initialize their own 401 * DDP component structure. The others are initialized here. 402 */ 403 if (comp_type == MTK_DISP_OVL || 404 comp_type == MTK_DISP_RDMA || 405 comp_type == MTK_DSI || 406 comp_type == MTK_DPI) { 407 dev_info(dev, "Adding component match for %s\n", 408 node->full_name); 409 component_match_add(dev, &match, compare_of, node); 410 } else { 411 struct mtk_ddp_comp *comp; 412 413 comp = devm_kzalloc(dev, sizeof(*comp), GFP_KERNEL); 414 if (!comp) { 415 ret = -ENOMEM; 416 goto err_node; 417 } 418 419 ret = mtk_ddp_comp_init(dev, node, comp, comp_id, NULL); 420 if (ret) 421 goto err_node; 422 423 private->ddp_comp[comp_id] = comp; 424 } 425 } 426 427 if (!private->mutex_node) { 428 dev_err(dev, "Failed to find disp-mutex node\n"); 429 ret = -ENODEV; 430 goto err_node; 431 } 432 433 pm_runtime_enable(dev); 434 435 platform_set_drvdata(pdev, private); 436 437 ret = component_master_add_with_match(dev, &mtk_drm_ops, match); 438 if (ret) 439 goto err_pm; 440 441 return 0; 442 443 err_pm: 444 pm_runtime_disable(dev); 445 err_node: 446 of_node_put(private->mutex_node); 447 for (i = 0; i < DDP_COMPONENT_ID_MAX; i++) 448 of_node_put(private->comp_node[i]); 449 return ret; 450 } 451 452 static int mtk_drm_remove(struct platform_device *pdev) 453 { 454 struct mtk_drm_private *private = platform_get_drvdata(pdev); 455 struct drm_device *drm = private->drm; 456 int i; 457 458 drm_connector_unregister_all(drm); 459 drm_dev_unregister(drm); 460 mtk_drm_kms_deinit(drm); 461 drm_dev_unref(drm); 462 463 component_master_del(&pdev->dev, &mtk_drm_ops); 464 pm_runtime_disable(&pdev->dev); 465 of_node_put(private->mutex_node); 466 for (i = 0; i < DDP_COMPONENT_ID_MAX; i++) 467 of_node_put(private->comp_node[i]); 468 469 return 0; 470 } 471 472 #ifdef CONFIG_PM_SLEEP 473 static int mtk_drm_sys_suspend(struct device *dev) 474 { 475 struct mtk_drm_private *private = dev_get_drvdata(dev); 476 struct drm_device *drm = private->drm; 477 478 drm_kms_helper_poll_disable(drm); 479 480 private->suspend_state = drm_atomic_helper_suspend(drm); 481 if (IS_ERR(private->suspend_state)) { 482 drm_kms_helper_poll_enable(drm); 483 return PTR_ERR(private->suspend_state); 484 } 485 486 DRM_DEBUG_DRIVER("mtk_drm_sys_suspend\n"); 487 return 0; 488 } 489 490 static int mtk_drm_sys_resume(struct device *dev) 491 { 492 struct mtk_drm_private *private = dev_get_drvdata(dev); 493 struct drm_device *drm = private->drm; 494 495 drm_atomic_helper_resume(drm, private->suspend_state); 496 drm_kms_helper_poll_enable(drm); 497 498 DRM_DEBUG_DRIVER("mtk_drm_sys_resume\n"); 499 return 0; 500 } 501 #endif 502 503 static SIMPLE_DEV_PM_OPS(mtk_drm_pm_ops, mtk_drm_sys_suspend, 504 mtk_drm_sys_resume); 505 506 static const struct of_device_id mtk_drm_of_ids[] = { 507 { .compatible = "mediatek,mt8173-mmsys", }, 508 { } 509 }; 510 511 static struct platform_driver mtk_drm_platform_driver = { 512 .probe = mtk_drm_probe, 513 .remove = mtk_drm_remove, 514 .driver = { 515 .name = "mediatek-drm", 516 .of_match_table = mtk_drm_of_ids, 517 .pm = &mtk_drm_pm_ops, 518 }, 519 }; 520 521 static struct platform_driver * const mtk_drm_drivers[] = { 522 &mtk_ddp_driver, 523 &mtk_disp_ovl_driver, 524 &mtk_disp_rdma_driver, 525 &mtk_dpi_driver, 526 &mtk_drm_platform_driver, 527 &mtk_dsi_driver, 528 &mtk_mipi_tx_driver, 529 }; 530 531 static int __init mtk_drm_init(void) 532 { 533 int ret; 534 int i; 535 536 for (i = 0; i < ARRAY_SIZE(mtk_drm_drivers); i++) { 537 ret = platform_driver_register(mtk_drm_drivers[i]); 538 if (ret < 0) { 539 pr_err("Failed to register %s driver: %d\n", 540 mtk_drm_drivers[i]->driver.name, ret); 541 goto err; 542 } 543 } 544 545 return 0; 546 547 err: 548 while (--i >= 0) 549 platform_driver_unregister(mtk_drm_drivers[i]); 550 551 return ret; 552 } 553 554 static void __exit mtk_drm_exit(void) 555 { 556 int i; 557 558 for (i = ARRAY_SIZE(mtk_drm_drivers) - 1; i >= 0; i--) 559 platform_driver_unregister(mtk_drm_drivers[i]); 560 } 561 562 module_init(mtk_drm_init); 563 module_exit(mtk_drm_exit); 564 565 MODULE_AUTHOR("YT SHEN <yt.shen@mediatek.com>"); 566 MODULE_DESCRIPTION("Mediatek SoC DRM driver"); 567 MODULE_LICENSE("GPL v2"); 568