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