1 /* 2 * Copyright (C) Fuzhou Rockchip Electronics Co.Ltd 3 * Author:Mark Yao <mark.yao@rock-chips.com> 4 * 5 * based on exynos_drm_drv.c 6 * 7 * This software is licensed under the terms of the GNU General Public 8 * License version 2, as published by the Free Software Foundation, and 9 * may be copied, distributed, and modified under those terms. 10 * 11 * This program is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 * GNU General Public License for more details. 15 */ 16 17 #include <asm/dma-iommu.h> 18 19 #include <drm/drmP.h> 20 #include <drm/drm_crtc_helper.h> 21 #include <drm/drm_fb_helper.h> 22 #include <linux/dma-mapping.h> 23 #include <linux/pm_runtime.h> 24 #include <linux/module.h> 25 #include <linux/of_graph.h> 26 #include <linux/component.h> 27 28 #include "rockchip_drm_drv.h" 29 #include "rockchip_drm_fb.h" 30 #include "rockchip_drm_fbdev.h" 31 #include "rockchip_drm_gem.h" 32 33 #define DRIVER_NAME "rockchip" 34 #define DRIVER_DESC "RockChip Soc DRM" 35 #define DRIVER_DATE "20140818" 36 #define DRIVER_MAJOR 1 37 #define DRIVER_MINOR 0 38 39 /* 40 * Attach a (component) device to the shared drm dma mapping from master drm 41 * device. This is used by the VOPs to map GEM buffers to a common DMA 42 * mapping. 43 */ 44 int rockchip_drm_dma_attach_device(struct drm_device *drm_dev, 45 struct device *dev) 46 { 47 struct dma_iommu_mapping *mapping = drm_dev->dev->archdata.mapping; 48 int ret; 49 50 ret = dma_set_coherent_mask(dev, DMA_BIT_MASK(32)); 51 if (ret) 52 return ret; 53 54 dma_set_max_seg_size(dev, DMA_BIT_MASK(32)); 55 56 return arm_iommu_attach_device(dev, mapping); 57 } 58 EXPORT_SYMBOL_GPL(rockchip_drm_dma_attach_device); 59 60 void rockchip_drm_dma_detach_device(struct drm_device *drm_dev, 61 struct device *dev) 62 { 63 arm_iommu_detach_device(dev); 64 } 65 EXPORT_SYMBOL_GPL(rockchip_drm_dma_detach_device); 66 67 int rockchip_register_crtc_funcs(struct drm_device *dev, 68 const struct rockchip_crtc_funcs *crtc_funcs, 69 int pipe) 70 { 71 struct rockchip_drm_private *priv = dev->dev_private; 72 73 if (pipe > ROCKCHIP_MAX_CRTC) 74 return -EINVAL; 75 76 priv->crtc_funcs[pipe] = crtc_funcs; 77 78 return 0; 79 } 80 EXPORT_SYMBOL_GPL(rockchip_register_crtc_funcs); 81 82 void rockchip_unregister_crtc_funcs(struct drm_device *dev, int pipe) 83 { 84 struct rockchip_drm_private *priv = dev->dev_private; 85 86 if (pipe > ROCKCHIP_MAX_CRTC) 87 return; 88 89 priv->crtc_funcs[pipe] = NULL; 90 } 91 EXPORT_SYMBOL_GPL(rockchip_unregister_crtc_funcs); 92 93 static struct drm_crtc *rockchip_crtc_from_pipe(struct drm_device *drm, 94 int pipe) 95 { 96 struct drm_crtc *crtc; 97 int i = 0; 98 99 list_for_each_entry(crtc, &drm->mode_config.crtc_list, head) 100 if (i++ == pipe) 101 return crtc; 102 103 return NULL; 104 } 105 106 static int rockchip_drm_crtc_enable_vblank(struct drm_device *dev, 107 unsigned int pipe) 108 { 109 struct rockchip_drm_private *priv = dev->dev_private; 110 struct drm_crtc *crtc = rockchip_crtc_from_pipe(dev, pipe); 111 112 if (crtc && priv->crtc_funcs[pipe] && 113 priv->crtc_funcs[pipe]->enable_vblank) 114 return priv->crtc_funcs[pipe]->enable_vblank(crtc); 115 116 return 0; 117 } 118 119 static void rockchip_drm_crtc_disable_vblank(struct drm_device *dev, 120 unsigned int pipe) 121 { 122 struct rockchip_drm_private *priv = dev->dev_private; 123 struct drm_crtc *crtc = rockchip_crtc_from_pipe(dev, pipe); 124 125 if (crtc && priv->crtc_funcs[pipe] && 126 priv->crtc_funcs[pipe]->enable_vblank) 127 priv->crtc_funcs[pipe]->disable_vblank(crtc); 128 } 129 130 static int rockchip_drm_load(struct drm_device *drm_dev, unsigned long flags) 131 { 132 struct rockchip_drm_private *private; 133 struct dma_iommu_mapping *mapping; 134 struct device *dev = drm_dev->dev; 135 struct drm_connector *connector; 136 int ret; 137 138 private = devm_kzalloc(drm_dev->dev, sizeof(*private), GFP_KERNEL); 139 if (!private) 140 return -ENOMEM; 141 142 drm_dev->dev_private = private; 143 144 drm_mode_config_init(drm_dev); 145 146 rockchip_drm_mode_config_init(drm_dev); 147 148 dev->dma_parms = devm_kzalloc(dev, sizeof(*dev->dma_parms), 149 GFP_KERNEL); 150 if (!dev->dma_parms) { 151 ret = -ENOMEM; 152 goto err_config_cleanup; 153 } 154 155 /* TODO(djkurtz): fetch the mapping start/size from somewhere */ 156 mapping = arm_iommu_create_mapping(&platform_bus_type, 0x00000000, 157 SZ_2G); 158 if (IS_ERR(mapping)) { 159 ret = PTR_ERR(mapping); 160 goto err_config_cleanup; 161 } 162 163 ret = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(32)); 164 if (ret) 165 goto err_release_mapping; 166 167 dma_set_max_seg_size(dev, DMA_BIT_MASK(32)); 168 169 ret = arm_iommu_attach_device(dev, mapping); 170 if (ret) 171 goto err_release_mapping; 172 173 /* Try to bind all sub drivers. */ 174 ret = component_bind_all(dev, drm_dev); 175 if (ret) 176 goto err_detach_device; 177 178 /* 179 * All components are now added, we can publish the connector sysfs 180 * entries to userspace. This will generate hotplug events and so 181 * userspace will expect to be able to access DRM at this point. 182 */ 183 list_for_each_entry(connector, &drm_dev->mode_config.connector_list, 184 head) { 185 ret = drm_connector_register(connector); 186 if (ret) { 187 dev_err(drm_dev->dev, 188 "[CONNECTOR:%d:%s] drm_connector_register failed: %d\n", 189 connector->base.id, 190 connector->name, ret); 191 goto err_unbind; 192 } 193 } 194 195 /* init kms poll for handling hpd */ 196 drm_kms_helper_poll_init(drm_dev); 197 198 /* 199 * enable drm irq mode. 200 * - with irq_enabled = true, we can use the vblank feature. 201 */ 202 drm_dev->irq_enabled = true; 203 204 ret = drm_vblank_init(drm_dev, ROCKCHIP_MAX_CRTC); 205 if (ret) 206 goto err_kms_helper_poll_fini; 207 208 /* 209 * with vblank_disable_allowed = true, vblank interrupt will be disabled 210 * by drm timer once a current process gives up ownership of 211 * vblank event.(after drm_vblank_put function is called) 212 */ 213 drm_dev->vblank_disable_allowed = true; 214 215 ret = rockchip_drm_fbdev_init(drm_dev); 216 if (ret) 217 goto err_vblank_cleanup; 218 219 return 0; 220 err_vblank_cleanup: 221 drm_vblank_cleanup(drm_dev); 222 err_kms_helper_poll_fini: 223 drm_kms_helper_poll_fini(drm_dev); 224 err_unbind: 225 component_unbind_all(dev, drm_dev); 226 err_detach_device: 227 arm_iommu_detach_device(dev); 228 err_release_mapping: 229 arm_iommu_release_mapping(dev->archdata.mapping); 230 err_config_cleanup: 231 drm_mode_config_cleanup(drm_dev); 232 drm_dev->dev_private = NULL; 233 return ret; 234 } 235 236 static int rockchip_drm_unload(struct drm_device *drm_dev) 237 { 238 struct device *dev = drm_dev->dev; 239 240 rockchip_drm_fbdev_fini(drm_dev); 241 drm_vblank_cleanup(drm_dev); 242 drm_kms_helper_poll_fini(drm_dev); 243 component_unbind_all(dev, drm_dev); 244 arm_iommu_detach_device(dev); 245 arm_iommu_release_mapping(dev->archdata.mapping); 246 drm_mode_config_cleanup(drm_dev); 247 drm_dev->dev_private = NULL; 248 249 return 0; 250 } 251 252 void rockchip_drm_lastclose(struct drm_device *dev) 253 { 254 struct rockchip_drm_private *priv = dev->dev_private; 255 256 drm_fb_helper_restore_fbdev_mode_unlocked(&priv->fbdev_helper); 257 } 258 259 static const struct file_operations rockchip_drm_driver_fops = { 260 .owner = THIS_MODULE, 261 .open = drm_open, 262 .mmap = rockchip_gem_mmap, 263 .poll = drm_poll, 264 .read = drm_read, 265 .unlocked_ioctl = drm_ioctl, 266 #ifdef CONFIG_COMPAT 267 .compat_ioctl = drm_compat_ioctl, 268 #endif 269 .release = drm_release, 270 }; 271 272 const struct vm_operations_struct rockchip_drm_vm_ops = { 273 .open = drm_gem_vm_open, 274 .close = drm_gem_vm_close, 275 }; 276 277 static struct drm_driver rockchip_drm_driver = { 278 .driver_features = DRIVER_MODESET | DRIVER_GEM | DRIVER_PRIME, 279 .load = rockchip_drm_load, 280 .unload = rockchip_drm_unload, 281 .lastclose = rockchip_drm_lastclose, 282 .get_vblank_counter = drm_vblank_no_hw_counter, 283 .enable_vblank = rockchip_drm_crtc_enable_vblank, 284 .disable_vblank = rockchip_drm_crtc_disable_vblank, 285 .gem_vm_ops = &rockchip_drm_vm_ops, 286 .gem_free_object = rockchip_gem_free_object, 287 .dumb_create = rockchip_gem_dumb_create, 288 .dumb_map_offset = rockchip_gem_dumb_map_offset, 289 .dumb_destroy = drm_gem_dumb_destroy, 290 .prime_handle_to_fd = drm_gem_prime_handle_to_fd, 291 .prime_fd_to_handle = drm_gem_prime_fd_to_handle, 292 .gem_prime_import = drm_gem_prime_import, 293 .gem_prime_export = drm_gem_prime_export, 294 .gem_prime_get_sg_table = rockchip_gem_prime_get_sg_table, 295 .gem_prime_vmap = rockchip_gem_prime_vmap, 296 .gem_prime_vunmap = rockchip_gem_prime_vunmap, 297 .gem_prime_mmap = rockchip_gem_mmap_buf, 298 .fops = &rockchip_drm_driver_fops, 299 .name = DRIVER_NAME, 300 .desc = DRIVER_DESC, 301 .date = DRIVER_DATE, 302 .major = DRIVER_MAJOR, 303 .minor = DRIVER_MINOR, 304 }; 305 306 #ifdef CONFIG_PM_SLEEP 307 static int rockchip_drm_sys_suspend(struct device *dev) 308 { 309 struct drm_device *drm = dev_get_drvdata(dev); 310 struct drm_connector *connector; 311 312 if (!drm) 313 return 0; 314 315 drm_modeset_lock_all(drm); 316 list_for_each_entry(connector, &drm->mode_config.connector_list, head) { 317 int old_dpms = connector->dpms; 318 319 if (connector->funcs->dpms) 320 connector->funcs->dpms(connector, DRM_MODE_DPMS_OFF); 321 322 /* Set the old mode back to the connector for resume */ 323 connector->dpms = old_dpms; 324 } 325 drm_modeset_unlock_all(drm); 326 327 return 0; 328 } 329 330 static int rockchip_drm_sys_resume(struct device *dev) 331 { 332 struct drm_device *drm = dev_get_drvdata(dev); 333 struct drm_connector *connector; 334 enum drm_connector_status status; 335 bool changed = false; 336 337 if (!drm) 338 return 0; 339 340 drm_modeset_lock_all(drm); 341 list_for_each_entry(connector, &drm->mode_config.connector_list, head) { 342 int desired_mode = connector->dpms; 343 344 /* 345 * at suspend time, we save dpms to connector->dpms, 346 * restore the old_dpms, and at current time, the connector 347 * dpms status must be DRM_MODE_DPMS_OFF. 348 */ 349 connector->dpms = DRM_MODE_DPMS_OFF; 350 351 /* 352 * If the connector has been disconnected during suspend, 353 * disconnect it from the encoder and leave it off. We'll notify 354 * userspace at the end. 355 */ 356 if (desired_mode == DRM_MODE_DPMS_ON) { 357 status = connector->funcs->detect(connector, true); 358 if (status == connector_status_disconnected) { 359 connector->encoder = NULL; 360 connector->status = status; 361 changed = true; 362 continue; 363 } 364 } 365 if (connector->funcs->dpms) 366 connector->funcs->dpms(connector, desired_mode); 367 } 368 drm_modeset_unlock_all(drm); 369 370 drm_helper_resume_force_mode(drm); 371 372 if (changed) 373 drm_kms_helper_hotplug_event(drm); 374 375 return 0; 376 } 377 #endif 378 379 static const struct dev_pm_ops rockchip_drm_pm_ops = { 380 SET_SYSTEM_SLEEP_PM_OPS(rockchip_drm_sys_suspend, 381 rockchip_drm_sys_resume) 382 }; 383 384 /* 385 * @node: device tree node containing encoder input ports 386 * @encoder: drm_encoder 387 */ 388 int rockchip_drm_encoder_get_mux_id(struct device_node *node, 389 struct drm_encoder *encoder) 390 { 391 struct device_node *ep; 392 struct drm_crtc *crtc = encoder->crtc; 393 struct of_endpoint endpoint; 394 struct device_node *port; 395 int ret; 396 397 if (!node || !crtc) 398 return -EINVAL; 399 400 for_each_endpoint_of_node(node, ep) { 401 port = of_graph_get_remote_port(ep); 402 of_node_put(port); 403 if (port == crtc->port) { 404 ret = of_graph_parse_endpoint(ep, &endpoint); 405 of_node_put(ep); 406 return ret ?: endpoint.id; 407 } 408 } 409 410 return -EINVAL; 411 } 412 EXPORT_SYMBOL_GPL(rockchip_drm_encoder_get_mux_id); 413 414 static int compare_of(struct device *dev, void *data) 415 { 416 struct device_node *np = data; 417 418 return dev->of_node == np; 419 } 420 421 static void rockchip_add_endpoints(struct device *dev, 422 struct component_match **match, 423 struct device_node *port) 424 { 425 struct device_node *ep, *remote; 426 427 for_each_child_of_node(port, ep) { 428 remote = of_graph_get_remote_port_parent(ep); 429 if (!remote || !of_device_is_available(remote)) { 430 of_node_put(remote); 431 continue; 432 } else if (!of_device_is_available(remote->parent)) { 433 dev_warn(dev, "parent device of %s is not available\n", 434 remote->full_name); 435 of_node_put(remote); 436 continue; 437 } 438 439 component_match_add(dev, match, compare_of, remote); 440 of_node_put(remote); 441 } 442 } 443 444 static int rockchip_drm_bind(struct device *dev) 445 { 446 struct drm_device *drm; 447 int ret; 448 449 drm = drm_dev_alloc(&rockchip_drm_driver, dev); 450 if (!drm) 451 return -ENOMEM; 452 453 ret = drm_dev_set_unique(drm, "%s", dev_name(dev)); 454 if (ret) 455 goto err_free; 456 457 ret = drm_dev_register(drm, 0); 458 if (ret) 459 goto err_free; 460 461 dev_set_drvdata(dev, drm); 462 463 return 0; 464 465 err_free: 466 drm_dev_unref(drm); 467 return ret; 468 } 469 470 static void rockchip_drm_unbind(struct device *dev) 471 { 472 struct drm_device *drm = dev_get_drvdata(dev); 473 474 drm_dev_unregister(drm); 475 drm_dev_unref(drm); 476 dev_set_drvdata(dev, NULL); 477 } 478 479 static const struct component_master_ops rockchip_drm_ops = { 480 .bind = rockchip_drm_bind, 481 .unbind = rockchip_drm_unbind, 482 }; 483 484 static int rockchip_drm_platform_probe(struct platform_device *pdev) 485 { 486 struct device *dev = &pdev->dev; 487 struct component_match *match = NULL; 488 struct device_node *np = dev->of_node; 489 struct device_node *port; 490 int i; 491 492 if (!np) 493 return -ENODEV; 494 /* 495 * Bind the crtc ports first, so that 496 * drm_of_find_possible_crtcs called from encoder .bind callbacks 497 * works as expected. 498 */ 499 for (i = 0;; i++) { 500 port = of_parse_phandle(np, "ports", i); 501 if (!port) 502 break; 503 504 if (!of_device_is_available(port->parent)) { 505 of_node_put(port); 506 continue; 507 } 508 509 component_match_add(dev, &match, compare_of, port->parent); 510 of_node_put(port); 511 } 512 513 if (i == 0) { 514 dev_err(dev, "missing 'ports' property\n"); 515 return -ENODEV; 516 } 517 518 if (!match) { 519 dev_err(dev, "No available vop found for display-subsystem.\n"); 520 return -ENODEV; 521 } 522 /* 523 * For each bound crtc, bind the encoders attached to its 524 * remote endpoint. 525 */ 526 for (i = 0;; i++) { 527 port = of_parse_phandle(np, "ports", i); 528 if (!port) 529 break; 530 531 if (!of_device_is_available(port->parent)) { 532 of_node_put(port); 533 continue; 534 } 535 536 rockchip_add_endpoints(dev, &match, port); 537 of_node_put(port); 538 } 539 540 return component_master_add_with_match(dev, &rockchip_drm_ops, match); 541 } 542 543 static int rockchip_drm_platform_remove(struct platform_device *pdev) 544 { 545 component_master_del(&pdev->dev, &rockchip_drm_ops); 546 547 return 0; 548 } 549 550 static const struct of_device_id rockchip_drm_dt_ids[] = { 551 { .compatible = "rockchip,display-subsystem", }, 552 { /* sentinel */ }, 553 }; 554 MODULE_DEVICE_TABLE(of, rockchip_drm_dt_ids); 555 556 static struct platform_driver rockchip_drm_platform_driver = { 557 .probe = rockchip_drm_platform_probe, 558 .remove = rockchip_drm_platform_remove, 559 .driver = { 560 .name = "rockchip-drm", 561 .of_match_table = rockchip_drm_dt_ids, 562 .pm = &rockchip_drm_pm_ops, 563 }, 564 }; 565 566 module_platform_driver(rockchip_drm_platform_driver); 567 568 MODULE_AUTHOR("Mark Yao <mark.yao@rock-chips.com>"); 569 MODULE_DESCRIPTION("ROCKCHIP DRM Driver"); 570 MODULE_LICENSE("GPL v2"); 571