1 /* 2 * Copyright (c) 2016 Intel Corporation 3 * 4 * Permission to use, copy, modify, distribute, and sell this software and its 5 * documentation for any purpose is hereby granted without fee, provided that 6 * the above copyright notice appear in all copies and that both that copyright 7 * notice and this permission notice appear in supporting documentation, and 8 * that the name of the copyright holders not be used in advertising or 9 * publicity pertaining to distribution of the software without specific, 10 * written prior permission. The copyright holders make no representations 11 * about the suitability of this software for any purpose. It is provided "as 12 * is" without express or implied warranty. 13 * 14 * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, 15 * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO 16 * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR 17 * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, 18 * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER 19 * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE 20 * OF THIS SOFTWARE. 21 */ 22 23 #include <drm/drm_connector.h> 24 #include <drm/drm_edid.h> 25 #include <drm/drm_encoder.h> 26 #include <drm/drm_utils.h> 27 #include <drm/drm_print.h> 28 #include <drm/drm_drv.h> 29 #include <drm/drm_file.h> 30 31 #include <linux/uaccess.h> 32 33 #include "drm_crtc_internal.h" 34 #include "drm_internal.h" 35 36 /** 37 * DOC: overview 38 * 39 * In DRM connectors are the general abstraction for display sinks, and include 40 * als fixed panels or anything else that can display pixels in some form. As 41 * opposed to all other KMS objects representing hardware (like CRTC, encoder or 42 * plane abstractions) connectors can be hotplugged and unplugged at runtime. 43 * Hence they are reference-counted using drm_connector_get() and 44 * drm_connector_put(). 45 * 46 * KMS driver must create, initialize, register and attach at a &struct 47 * drm_connector for each such sink. The instance is created as other KMS 48 * objects and initialized by setting the following fields. The connector is 49 * initialized with a call to drm_connector_init() with a pointer to the 50 * &struct drm_connector_funcs and a connector type, and then exposed to 51 * userspace with a call to drm_connector_register(). 52 * 53 * Connectors must be attached to an encoder to be used. For devices that map 54 * connectors to encoders 1:1, the connector should be attached at 55 * initialization time with a call to drm_connector_attach_encoder(). The 56 * driver must also set the &drm_connector.encoder field to point to the 57 * attached encoder. 58 * 59 * For connectors which are not fixed (like built-in panels) the driver needs to 60 * support hotplug notifications. The simplest way to do that is by using the 61 * probe helpers, see drm_kms_helper_poll_init() for connectors which don't have 62 * hardware support for hotplug interrupts. Connectors with hardware hotplug 63 * support can instead use e.g. drm_helper_hpd_irq_event(). 64 */ 65 66 struct drm_conn_prop_enum_list { 67 int type; 68 const char *name; 69 struct ida ida; 70 }; 71 72 /* 73 * Connector and encoder types. 74 */ 75 static struct drm_conn_prop_enum_list drm_connector_enum_list[] = { 76 { DRM_MODE_CONNECTOR_Unknown, "Unknown" }, 77 { DRM_MODE_CONNECTOR_VGA, "VGA" }, 78 { DRM_MODE_CONNECTOR_DVII, "DVI-I" }, 79 { DRM_MODE_CONNECTOR_DVID, "DVI-D" }, 80 { DRM_MODE_CONNECTOR_DVIA, "DVI-A" }, 81 { DRM_MODE_CONNECTOR_Composite, "Composite" }, 82 { DRM_MODE_CONNECTOR_SVIDEO, "SVIDEO" }, 83 { DRM_MODE_CONNECTOR_LVDS, "LVDS" }, 84 { DRM_MODE_CONNECTOR_Component, "Component" }, 85 { DRM_MODE_CONNECTOR_9PinDIN, "DIN" }, 86 { DRM_MODE_CONNECTOR_DisplayPort, "DP" }, 87 { DRM_MODE_CONNECTOR_HDMIA, "HDMI-A" }, 88 { DRM_MODE_CONNECTOR_HDMIB, "HDMI-B" }, 89 { DRM_MODE_CONNECTOR_TV, "TV" }, 90 { DRM_MODE_CONNECTOR_eDP, "eDP" }, 91 { DRM_MODE_CONNECTOR_VIRTUAL, "Virtual" }, 92 { DRM_MODE_CONNECTOR_DSI, "DSI" }, 93 { DRM_MODE_CONNECTOR_DPI, "DPI" }, 94 { DRM_MODE_CONNECTOR_WRITEBACK, "Writeback" }, 95 }; 96 97 void drm_connector_ida_init(void) 98 { 99 int i; 100 101 for (i = 0; i < ARRAY_SIZE(drm_connector_enum_list); i++) 102 ida_init(&drm_connector_enum_list[i].ida); 103 } 104 105 void drm_connector_ida_destroy(void) 106 { 107 int i; 108 109 for (i = 0; i < ARRAY_SIZE(drm_connector_enum_list); i++) 110 ida_destroy(&drm_connector_enum_list[i].ida); 111 } 112 113 /** 114 * drm_connector_get_cmdline_mode - reads the user's cmdline mode 115 * @connector: connector to quwery 116 * 117 * The kernel supports per-connector configuration of its consoles through 118 * use of the video= parameter. This function parses that option and 119 * extracts the user's specified mode (or enable/disable status) for a 120 * particular connector. This is typically only used during the early fbdev 121 * setup. 122 */ 123 static void drm_connector_get_cmdline_mode(struct drm_connector *connector) 124 { 125 struct drm_cmdline_mode *mode = &connector->cmdline_mode; 126 char *option = NULL; 127 128 if (fb_get_options(connector->name, &option)) 129 return; 130 131 if (!drm_mode_parse_command_line_for_connector(option, 132 connector, 133 mode)) 134 return; 135 136 if (mode->force) { 137 DRM_INFO("forcing %s connector %s\n", connector->name, 138 drm_get_connector_force_name(mode->force)); 139 connector->force = mode->force; 140 } 141 142 DRM_DEBUG_KMS("cmdline mode for connector %s %dx%d@%dHz%s%s%s\n", 143 connector->name, 144 mode->xres, mode->yres, 145 mode->refresh_specified ? mode->refresh : 60, 146 mode->rb ? " reduced blanking" : "", 147 mode->margins ? " with margins" : "", 148 mode->interlace ? " interlaced" : ""); 149 } 150 151 static void drm_connector_free(struct kref *kref) 152 { 153 struct drm_connector *connector = 154 container_of(kref, struct drm_connector, base.refcount); 155 struct drm_device *dev = connector->dev; 156 157 drm_mode_object_unregister(dev, &connector->base); 158 connector->funcs->destroy(connector); 159 } 160 161 void drm_connector_free_work_fn(struct work_struct *work) 162 { 163 struct drm_connector *connector, *n; 164 struct drm_device *dev = 165 container_of(work, struct drm_device, mode_config.connector_free_work); 166 struct drm_mode_config *config = &dev->mode_config; 167 unsigned long flags; 168 struct llist_node *freed; 169 170 spin_lock_irqsave(&config->connector_list_lock, flags); 171 freed = llist_del_all(&config->connector_free_list); 172 spin_unlock_irqrestore(&config->connector_list_lock, flags); 173 174 llist_for_each_entry_safe(connector, n, freed, free_node) { 175 drm_mode_object_unregister(dev, &connector->base); 176 connector->funcs->destroy(connector); 177 } 178 } 179 180 /** 181 * drm_connector_init - Init a preallocated connector 182 * @dev: DRM device 183 * @connector: the connector to init 184 * @funcs: callbacks for this connector 185 * @connector_type: user visible type of the connector 186 * 187 * Initialises a preallocated connector. Connectors should be 188 * subclassed as part of driver connector objects. 189 * 190 * Returns: 191 * Zero on success, error code on failure. 192 */ 193 int drm_connector_init(struct drm_device *dev, 194 struct drm_connector *connector, 195 const struct drm_connector_funcs *funcs, 196 int connector_type) 197 { 198 struct drm_mode_config *config = &dev->mode_config; 199 int ret; 200 struct ida *connector_ida = 201 &drm_connector_enum_list[connector_type].ida; 202 203 WARN_ON(drm_drv_uses_atomic_modeset(dev) && 204 (!funcs->atomic_destroy_state || 205 !funcs->atomic_duplicate_state)); 206 207 ret = __drm_mode_object_add(dev, &connector->base, 208 DRM_MODE_OBJECT_CONNECTOR, 209 false, drm_connector_free); 210 if (ret) 211 return ret; 212 213 connector->base.properties = &connector->properties; 214 connector->dev = dev; 215 connector->funcs = funcs; 216 217 /* connector index is used with 32bit bitmasks */ 218 ret = ida_simple_get(&config->connector_ida, 0, 32, GFP_KERNEL); 219 if (ret < 0) { 220 DRM_DEBUG_KMS("Failed to allocate %s connector index: %d\n", 221 drm_connector_enum_list[connector_type].name, 222 ret); 223 goto out_put; 224 } 225 connector->index = ret; 226 ret = 0; 227 228 connector->connector_type = connector_type; 229 connector->connector_type_id = 230 ida_simple_get(connector_ida, 1, 0, GFP_KERNEL); 231 if (connector->connector_type_id < 0) { 232 ret = connector->connector_type_id; 233 goto out_put_id; 234 } 235 connector->name = 236 kasprintf(GFP_KERNEL, "%s-%d", 237 drm_connector_enum_list[connector_type].name, 238 connector->connector_type_id); 239 if (!connector->name) { 240 ret = -ENOMEM; 241 goto out_put_type_id; 242 } 243 244 INIT_LIST_HEAD(&connector->probed_modes); 245 INIT_LIST_HEAD(&connector->modes); 246 mutex_init(&connector->mutex); 247 connector->edid_blob_ptr = NULL; 248 connector->tile_blob_ptr = NULL; 249 connector->status = connector_status_unknown; 250 connector->display_info.panel_orientation = 251 DRM_MODE_PANEL_ORIENTATION_UNKNOWN; 252 253 drm_connector_get_cmdline_mode(connector); 254 255 /* We should add connectors at the end to avoid upsetting the connector 256 * index too much. */ 257 spin_lock_irq(&config->connector_list_lock); 258 list_add_tail(&connector->head, &config->connector_list); 259 config->num_connector++; 260 spin_unlock_irq(&config->connector_list_lock); 261 262 if (connector_type != DRM_MODE_CONNECTOR_VIRTUAL && 263 connector_type != DRM_MODE_CONNECTOR_WRITEBACK) 264 drm_connector_attach_edid_property(connector); 265 266 drm_object_attach_property(&connector->base, 267 config->dpms_property, 0); 268 269 drm_object_attach_property(&connector->base, 270 config->link_status_property, 271 0); 272 273 drm_object_attach_property(&connector->base, 274 config->non_desktop_property, 275 0); 276 drm_object_attach_property(&connector->base, 277 config->tile_property, 278 0); 279 280 if (drm_core_check_feature(dev, DRIVER_ATOMIC)) { 281 drm_object_attach_property(&connector->base, config->prop_crtc_id, 0); 282 } 283 284 connector->debugfs_entry = NULL; 285 out_put_type_id: 286 if (ret) 287 ida_simple_remove(connector_ida, connector->connector_type_id); 288 out_put_id: 289 if (ret) 290 ida_simple_remove(&config->connector_ida, connector->index); 291 out_put: 292 if (ret) 293 drm_mode_object_unregister(dev, &connector->base); 294 295 return ret; 296 } 297 EXPORT_SYMBOL(drm_connector_init); 298 299 /** 300 * drm_connector_attach_edid_property - attach edid property. 301 * @connector: the connector 302 * 303 * Some connector types like DRM_MODE_CONNECTOR_VIRTUAL do not get a 304 * edid property attached by default. This function can be used to 305 * explicitly enable the edid property in these cases. 306 */ 307 void drm_connector_attach_edid_property(struct drm_connector *connector) 308 { 309 struct drm_mode_config *config = &connector->dev->mode_config; 310 311 drm_object_attach_property(&connector->base, 312 config->edid_property, 313 0); 314 } 315 EXPORT_SYMBOL(drm_connector_attach_edid_property); 316 317 /** 318 * drm_connector_attach_encoder - attach a connector to an encoder 319 * @connector: connector to attach 320 * @encoder: encoder to attach @connector to 321 * 322 * This function links up a connector to an encoder. Note that the routing 323 * restrictions between encoders and crtcs are exposed to userspace through the 324 * possible_clones and possible_crtcs bitmasks. 325 * 326 * Returns: 327 * Zero on success, negative errno on failure. 328 */ 329 int drm_connector_attach_encoder(struct drm_connector *connector, 330 struct drm_encoder *encoder) 331 { 332 int i; 333 334 /* 335 * In the past, drivers have attempted to model the static association 336 * of connector to encoder in simple connector/encoder devices using a 337 * direct assignment of connector->encoder = encoder. This connection 338 * is a logical one and the responsibility of the core, so drivers are 339 * expected not to mess with this. 340 * 341 * Note that the error return should've been enough here, but a large 342 * majority of drivers ignores the return value, so add in a big WARN 343 * to get people's attention. 344 */ 345 if (WARN_ON(connector->encoder)) 346 return -EINVAL; 347 348 for (i = 0; i < ARRAY_SIZE(connector->encoder_ids); i++) { 349 if (connector->encoder_ids[i] == 0) { 350 connector->encoder_ids[i] = encoder->base.id; 351 return 0; 352 } 353 } 354 return -ENOMEM; 355 } 356 EXPORT_SYMBOL(drm_connector_attach_encoder); 357 358 /** 359 * drm_connector_has_possible_encoder - check if the connector and encoder are assosicated with each other 360 * @connector: the connector 361 * @encoder: the encoder 362 * 363 * Returns: 364 * True if @encoder is one of the possible encoders for @connector. 365 */ 366 bool drm_connector_has_possible_encoder(struct drm_connector *connector, 367 struct drm_encoder *encoder) 368 { 369 struct drm_encoder *enc; 370 int i; 371 372 drm_connector_for_each_possible_encoder(connector, enc, i) { 373 if (enc == encoder) 374 return true; 375 } 376 377 return false; 378 } 379 EXPORT_SYMBOL(drm_connector_has_possible_encoder); 380 381 static void drm_mode_remove(struct drm_connector *connector, 382 struct drm_display_mode *mode) 383 { 384 list_del(&mode->head); 385 drm_mode_destroy(connector->dev, mode); 386 } 387 388 /** 389 * drm_connector_cleanup - cleans up an initialised connector 390 * @connector: connector to cleanup 391 * 392 * Cleans up the connector but doesn't free the object. 393 */ 394 void drm_connector_cleanup(struct drm_connector *connector) 395 { 396 struct drm_device *dev = connector->dev; 397 struct drm_display_mode *mode, *t; 398 399 /* The connector should have been removed from userspace long before 400 * it is finally destroyed. 401 */ 402 if (WARN_ON(connector->registration_state == 403 DRM_CONNECTOR_REGISTERED)) 404 drm_connector_unregister(connector); 405 406 if (connector->tile_group) { 407 drm_mode_put_tile_group(dev, connector->tile_group); 408 connector->tile_group = NULL; 409 } 410 411 list_for_each_entry_safe(mode, t, &connector->probed_modes, head) 412 drm_mode_remove(connector, mode); 413 414 list_for_each_entry_safe(mode, t, &connector->modes, head) 415 drm_mode_remove(connector, mode); 416 417 ida_simple_remove(&drm_connector_enum_list[connector->connector_type].ida, 418 connector->connector_type_id); 419 420 ida_simple_remove(&dev->mode_config.connector_ida, 421 connector->index); 422 423 kfree(connector->display_info.bus_formats); 424 drm_mode_object_unregister(dev, &connector->base); 425 kfree(connector->name); 426 connector->name = NULL; 427 spin_lock_irq(&dev->mode_config.connector_list_lock); 428 list_del(&connector->head); 429 dev->mode_config.num_connector--; 430 spin_unlock_irq(&dev->mode_config.connector_list_lock); 431 432 WARN_ON(connector->state && !connector->funcs->atomic_destroy_state); 433 if (connector->state && connector->funcs->atomic_destroy_state) 434 connector->funcs->atomic_destroy_state(connector, 435 connector->state); 436 437 mutex_destroy(&connector->mutex); 438 439 memset(connector, 0, sizeof(*connector)); 440 } 441 EXPORT_SYMBOL(drm_connector_cleanup); 442 443 /** 444 * drm_connector_register - register a connector 445 * @connector: the connector to register 446 * 447 * Register userspace interfaces for a connector 448 * 449 * Returns: 450 * Zero on success, error code on failure. 451 */ 452 int drm_connector_register(struct drm_connector *connector) 453 { 454 int ret = 0; 455 456 if (!connector->dev->registered) 457 return 0; 458 459 mutex_lock(&connector->mutex); 460 if (connector->registration_state != DRM_CONNECTOR_INITIALIZING) 461 goto unlock; 462 463 ret = drm_sysfs_connector_add(connector); 464 if (ret) 465 goto unlock; 466 467 ret = drm_debugfs_connector_add(connector); 468 if (ret) { 469 goto err_sysfs; 470 } 471 472 if (connector->funcs->late_register) { 473 ret = connector->funcs->late_register(connector); 474 if (ret) 475 goto err_debugfs; 476 } 477 478 drm_mode_object_register(connector->dev, &connector->base); 479 480 connector->registration_state = DRM_CONNECTOR_REGISTERED; 481 goto unlock; 482 483 err_debugfs: 484 drm_debugfs_connector_remove(connector); 485 err_sysfs: 486 drm_sysfs_connector_remove(connector); 487 unlock: 488 mutex_unlock(&connector->mutex); 489 return ret; 490 } 491 EXPORT_SYMBOL(drm_connector_register); 492 493 /** 494 * drm_connector_unregister - unregister a connector 495 * @connector: the connector to unregister 496 * 497 * Unregister userspace interfaces for a connector 498 */ 499 void drm_connector_unregister(struct drm_connector *connector) 500 { 501 mutex_lock(&connector->mutex); 502 if (connector->registration_state != DRM_CONNECTOR_REGISTERED) { 503 mutex_unlock(&connector->mutex); 504 return; 505 } 506 507 if (connector->funcs->early_unregister) 508 connector->funcs->early_unregister(connector); 509 510 drm_sysfs_connector_remove(connector); 511 drm_debugfs_connector_remove(connector); 512 513 connector->registration_state = DRM_CONNECTOR_UNREGISTERED; 514 mutex_unlock(&connector->mutex); 515 } 516 EXPORT_SYMBOL(drm_connector_unregister); 517 518 void drm_connector_unregister_all(struct drm_device *dev) 519 { 520 struct drm_connector *connector; 521 struct drm_connector_list_iter conn_iter; 522 523 drm_connector_list_iter_begin(dev, &conn_iter); 524 drm_for_each_connector_iter(connector, &conn_iter) 525 drm_connector_unregister(connector); 526 drm_connector_list_iter_end(&conn_iter); 527 } 528 529 int drm_connector_register_all(struct drm_device *dev) 530 { 531 struct drm_connector *connector; 532 struct drm_connector_list_iter conn_iter; 533 int ret = 0; 534 535 drm_connector_list_iter_begin(dev, &conn_iter); 536 drm_for_each_connector_iter(connector, &conn_iter) { 537 ret = drm_connector_register(connector); 538 if (ret) 539 break; 540 } 541 drm_connector_list_iter_end(&conn_iter); 542 543 if (ret) 544 drm_connector_unregister_all(dev); 545 return ret; 546 } 547 548 /** 549 * drm_get_connector_status_name - return a string for connector status 550 * @status: connector status to compute name of 551 * 552 * In contrast to the other drm_get_*_name functions this one here returns a 553 * const pointer and hence is threadsafe. 554 */ 555 const char *drm_get_connector_status_name(enum drm_connector_status status) 556 { 557 if (status == connector_status_connected) 558 return "connected"; 559 else if (status == connector_status_disconnected) 560 return "disconnected"; 561 else 562 return "unknown"; 563 } 564 EXPORT_SYMBOL(drm_get_connector_status_name); 565 566 /** 567 * drm_get_connector_force_name - return a string for connector force 568 * @force: connector force to get name of 569 * 570 * Returns: const pointer to name. 571 */ 572 const char *drm_get_connector_force_name(enum drm_connector_force force) 573 { 574 switch (force) { 575 case DRM_FORCE_UNSPECIFIED: 576 return "unspecified"; 577 case DRM_FORCE_OFF: 578 return "off"; 579 case DRM_FORCE_ON: 580 return "on"; 581 case DRM_FORCE_ON_DIGITAL: 582 return "digital"; 583 default: 584 return "unknown"; 585 } 586 } 587 588 #ifdef CONFIG_LOCKDEP 589 static struct lockdep_map connector_list_iter_dep_map = { 590 .name = "drm_connector_list_iter" 591 }; 592 #endif 593 594 /** 595 * drm_connector_list_iter_begin - initialize a connector_list iterator 596 * @dev: DRM device 597 * @iter: connector_list iterator 598 * 599 * Sets @iter up to walk the &drm_mode_config.connector_list of @dev. @iter 600 * must always be cleaned up again by calling drm_connector_list_iter_end(). 601 * Iteration itself happens using drm_connector_list_iter_next() or 602 * drm_for_each_connector_iter(). 603 */ 604 void drm_connector_list_iter_begin(struct drm_device *dev, 605 struct drm_connector_list_iter *iter) 606 { 607 iter->dev = dev; 608 iter->conn = NULL; 609 lock_acquire_shared_recursive(&connector_list_iter_dep_map, 0, 1, NULL, _RET_IP_); 610 } 611 EXPORT_SYMBOL(drm_connector_list_iter_begin); 612 613 /* 614 * Extra-safe connector put function that works in any context. Should only be 615 * used from the connector_iter functions, where we never really expect to 616 * actually release the connector when dropping our final reference. 617 */ 618 static void 619 __drm_connector_put_safe(struct drm_connector *conn) 620 { 621 struct drm_mode_config *config = &conn->dev->mode_config; 622 623 lockdep_assert_held(&config->connector_list_lock); 624 625 if (!refcount_dec_and_test(&conn->base.refcount.refcount)) 626 return; 627 628 llist_add(&conn->free_node, &config->connector_free_list); 629 schedule_work(&config->connector_free_work); 630 } 631 632 /** 633 * drm_connector_list_iter_next - return next connector 634 * @iter: connector_list iterator 635 * 636 * Returns the next connector for @iter, or NULL when the list walk has 637 * completed. 638 */ 639 struct drm_connector * 640 drm_connector_list_iter_next(struct drm_connector_list_iter *iter) 641 { 642 struct drm_connector *old_conn = iter->conn; 643 struct drm_mode_config *config = &iter->dev->mode_config; 644 struct list_head *lhead; 645 unsigned long flags; 646 647 spin_lock_irqsave(&config->connector_list_lock, flags); 648 lhead = old_conn ? &old_conn->head : &config->connector_list; 649 650 do { 651 if (lhead->next == &config->connector_list) { 652 iter->conn = NULL; 653 break; 654 } 655 656 lhead = lhead->next; 657 iter->conn = list_entry(lhead, struct drm_connector, head); 658 659 /* loop until it's not a zombie connector */ 660 } while (!kref_get_unless_zero(&iter->conn->base.refcount)); 661 662 if (old_conn) 663 __drm_connector_put_safe(old_conn); 664 spin_unlock_irqrestore(&config->connector_list_lock, flags); 665 666 return iter->conn; 667 } 668 EXPORT_SYMBOL(drm_connector_list_iter_next); 669 670 /** 671 * drm_connector_list_iter_end - tear down a connector_list iterator 672 * @iter: connector_list iterator 673 * 674 * Tears down @iter and releases any resources (like &drm_connector references) 675 * acquired while walking the list. This must always be called, both when the 676 * iteration completes fully or when it was aborted without walking the entire 677 * list. 678 */ 679 void drm_connector_list_iter_end(struct drm_connector_list_iter *iter) 680 { 681 struct drm_mode_config *config = &iter->dev->mode_config; 682 unsigned long flags; 683 684 iter->dev = NULL; 685 if (iter->conn) { 686 spin_lock_irqsave(&config->connector_list_lock, flags); 687 __drm_connector_put_safe(iter->conn); 688 spin_unlock_irqrestore(&config->connector_list_lock, flags); 689 } 690 lock_release(&connector_list_iter_dep_map, 0, _RET_IP_); 691 } 692 EXPORT_SYMBOL(drm_connector_list_iter_end); 693 694 static const struct drm_prop_enum_list drm_subpixel_enum_list[] = { 695 { SubPixelUnknown, "Unknown" }, 696 { SubPixelHorizontalRGB, "Horizontal RGB" }, 697 { SubPixelHorizontalBGR, "Horizontal BGR" }, 698 { SubPixelVerticalRGB, "Vertical RGB" }, 699 { SubPixelVerticalBGR, "Vertical BGR" }, 700 { SubPixelNone, "None" }, 701 }; 702 703 /** 704 * drm_get_subpixel_order_name - return a string for a given subpixel enum 705 * @order: enum of subpixel_order 706 * 707 * Note you could abuse this and return something out of bounds, but that 708 * would be a caller error. No unscrubbed user data should make it here. 709 */ 710 const char *drm_get_subpixel_order_name(enum subpixel_order order) 711 { 712 return drm_subpixel_enum_list[order].name; 713 } 714 EXPORT_SYMBOL(drm_get_subpixel_order_name); 715 716 static const struct drm_prop_enum_list drm_dpms_enum_list[] = { 717 { DRM_MODE_DPMS_ON, "On" }, 718 { DRM_MODE_DPMS_STANDBY, "Standby" }, 719 { DRM_MODE_DPMS_SUSPEND, "Suspend" }, 720 { DRM_MODE_DPMS_OFF, "Off" } 721 }; 722 DRM_ENUM_NAME_FN(drm_get_dpms_name, drm_dpms_enum_list) 723 724 static const struct drm_prop_enum_list drm_link_status_enum_list[] = { 725 { DRM_MODE_LINK_STATUS_GOOD, "Good" }, 726 { DRM_MODE_LINK_STATUS_BAD, "Bad" }, 727 }; 728 729 /** 730 * drm_display_info_set_bus_formats - set the supported bus formats 731 * @info: display info to store bus formats in 732 * @formats: array containing the supported bus formats 733 * @num_formats: the number of entries in the fmts array 734 * 735 * Store the supported bus formats in display info structure. 736 * See MEDIA_BUS_FMT_* definitions in include/uapi/linux/media-bus-format.h for 737 * a full list of available formats. 738 */ 739 int drm_display_info_set_bus_formats(struct drm_display_info *info, 740 const u32 *formats, 741 unsigned int num_formats) 742 { 743 u32 *fmts = NULL; 744 745 if (!formats && num_formats) 746 return -EINVAL; 747 748 if (formats && num_formats) { 749 fmts = kmemdup(formats, sizeof(*formats) * num_formats, 750 GFP_KERNEL); 751 if (!fmts) 752 return -ENOMEM; 753 } 754 755 kfree(info->bus_formats); 756 info->bus_formats = fmts; 757 info->num_bus_formats = num_formats; 758 759 return 0; 760 } 761 EXPORT_SYMBOL(drm_display_info_set_bus_formats); 762 763 /* Optional connector properties. */ 764 static const struct drm_prop_enum_list drm_scaling_mode_enum_list[] = { 765 { DRM_MODE_SCALE_NONE, "None" }, 766 { DRM_MODE_SCALE_FULLSCREEN, "Full" }, 767 { DRM_MODE_SCALE_CENTER, "Center" }, 768 { DRM_MODE_SCALE_ASPECT, "Full aspect" }, 769 }; 770 771 static const struct drm_prop_enum_list drm_aspect_ratio_enum_list[] = { 772 { DRM_MODE_PICTURE_ASPECT_NONE, "Automatic" }, 773 { DRM_MODE_PICTURE_ASPECT_4_3, "4:3" }, 774 { DRM_MODE_PICTURE_ASPECT_16_9, "16:9" }, 775 }; 776 777 static const struct drm_prop_enum_list drm_content_type_enum_list[] = { 778 { DRM_MODE_CONTENT_TYPE_NO_DATA, "No Data" }, 779 { DRM_MODE_CONTENT_TYPE_GRAPHICS, "Graphics" }, 780 { DRM_MODE_CONTENT_TYPE_PHOTO, "Photo" }, 781 { DRM_MODE_CONTENT_TYPE_CINEMA, "Cinema" }, 782 { DRM_MODE_CONTENT_TYPE_GAME, "Game" }, 783 }; 784 785 static const struct drm_prop_enum_list drm_panel_orientation_enum_list[] = { 786 { DRM_MODE_PANEL_ORIENTATION_NORMAL, "Normal" }, 787 { DRM_MODE_PANEL_ORIENTATION_BOTTOM_UP, "Upside Down" }, 788 { DRM_MODE_PANEL_ORIENTATION_LEFT_UP, "Left Side Up" }, 789 { DRM_MODE_PANEL_ORIENTATION_RIGHT_UP, "Right Side Up" }, 790 }; 791 792 static const struct drm_prop_enum_list drm_dvi_i_select_enum_list[] = { 793 { DRM_MODE_SUBCONNECTOR_Automatic, "Automatic" }, /* DVI-I and TV-out */ 794 { DRM_MODE_SUBCONNECTOR_DVID, "DVI-D" }, /* DVI-I */ 795 { DRM_MODE_SUBCONNECTOR_DVIA, "DVI-A" }, /* DVI-I */ 796 }; 797 DRM_ENUM_NAME_FN(drm_get_dvi_i_select_name, drm_dvi_i_select_enum_list) 798 799 static const struct drm_prop_enum_list drm_dvi_i_subconnector_enum_list[] = { 800 { DRM_MODE_SUBCONNECTOR_Unknown, "Unknown" }, /* DVI-I and TV-out */ 801 { DRM_MODE_SUBCONNECTOR_DVID, "DVI-D" }, /* DVI-I */ 802 { DRM_MODE_SUBCONNECTOR_DVIA, "DVI-A" }, /* DVI-I */ 803 }; 804 DRM_ENUM_NAME_FN(drm_get_dvi_i_subconnector_name, 805 drm_dvi_i_subconnector_enum_list) 806 807 static const struct drm_prop_enum_list drm_tv_select_enum_list[] = { 808 { DRM_MODE_SUBCONNECTOR_Automatic, "Automatic" }, /* DVI-I and TV-out */ 809 { DRM_MODE_SUBCONNECTOR_Composite, "Composite" }, /* TV-out */ 810 { DRM_MODE_SUBCONNECTOR_SVIDEO, "SVIDEO" }, /* TV-out */ 811 { DRM_MODE_SUBCONNECTOR_Component, "Component" }, /* TV-out */ 812 { DRM_MODE_SUBCONNECTOR_SCART, "SCART" }, /* TV-out */ 813 }; 814 DRM_ENUM_NAME_FN(drm_get_tv_select_name, drm_tv_select_enum_list) 815 816 static const struct drm_prop_enum_list drm_tv_subconnector_enum_list[] = { 817 { DRM_MODE_SUBCONNECTOR_Unknown, "Unknown" }, /* DVI-I and TV-out */ 818 { DRM_MODE_SUBCONNECTOR_Composite, "Composite" }, /* TV-out */ 819 { DRM_MODE_SUBCONNECTOR_SVIDEO, "SVIDEO" }, /* TV-out */ 820 { DRM_MODE_SUBCONNECTOR_Component, "Component" }, /* TV-out */ 821 { DRM_MODE_SUBCONNECTOR_SCART, "SCART" }, /* TV-out */ 822 }; 823 DRM_ENUM_NAME_FN(drm_get_tv_subconnector_name, 824 drm_tv_subconnector_enum_list) 825 826 static struct drm_prop_enum_list drm_cp_enum_list[] = { 827 { DRM_MODE_CONTENT_PROTECTION_UNDESIRED, "Undesired" }, 828 { DRM_MODE_CONTENT_PROTECTION_DESIRED, "Desired" }, 829 { DRM_MODE_CONTENT_PROTECTION_ENABLED, "Enabled" }, 830 }; 831 DRM_ENUM_NAME_FN(drm_get_content_protection_name, drm_cp_enum_list) 832 833 static const struct drm_prop_enum_list hdmi_colorspaces[] = { 834 /* For Default case, driver will set the colorspace */ 835 { DRM_MODE_COLORIMETRY_DEFAULT, "Default" }, 836 /* Standard Definition Colorimetry based on CEA 861 */ 837 { DRM_MODE_COLORIMETRY_SMPTE_170M_YCC, "SMPTE_170M_YCC" }, 838 { DRM_MODE_COLORIMETRY_BT709_YCC, "BT709_YCC" }, 839 /* Standard Definition Colorimetry based on IEC 61966-2-4 */ 840 { DRM_MODE_COLORIMETRY_XVYCC_601, "XVYCC_601" }, 841 /* High Definition Colorimetry based on IEC 61966-2-4 */ 842 { DRM_MODE_COLORIMETRY_XVYCC_709, "XVYCC_709" }, 843 /* Colorimetry based on IEC 61966-2-1/Amendment 1 */ 844 { DRM_MODE_COLORIMETRY_SYCC_601, "SYCC_601" }, 845 /* Colorimetry based on IEC 61966-2-5 [33] */ 846 { DRM_MODE_COLORIMETRY_OPYCC_601, "opYCC_601" }, 847 /* Colorimetry based on IEC 61966-2-5 */ 848 { DRM_MODE_COLORIMETRY_OPRGB, "opRGB" }, 849 /* Colorimetry based on ITU-R BT.2020 */ 850 { DRM_MODE_COLORIMETRY_BT2020_CYCC, "BT2020_CYCC" }, 851 /* Colorimetry based on ITU-R BT.2020 */ 852 { DRM_MODE_COLORIMETRY_BT2020_RGB, "BT2020_RGB" }, 853 /* Colorimetry based on ITU-R BT.2020 */ 854 { DRM_MODE_COLORIMETRY_BT2020_YCC, "BT2020_YCC" }, 855 /* Added as part of Additional Colorimetry Extension in 861.G */ 856 { DRM_MODE_COLORIMETRY_DCI_P3_RGB_D65, "DCI-P3_RGB_D65" }, 857 { DRM_MODE_COLORIMETRY_DCI_P3_RGB_THEATER, "DCI-P3_RGB_Theater" }, 858 }; 859 860 /** 861 * DOC: standard connector properties 862 * 863 * DRM connectors have a few standardized properties: 864 * 865 * EDID: 866 * Blob property which contains the current EDID read from the sink. This 867 * is useful to parse sink identification information like vendor, model 868 * and serial. Drivers should update this property by calling 869 * drm_connector_update_edid_property(), usually after having parsed 870 * the EDID using drm_add_edid_modes(). Userspace cannot change this 871 * property. 872 * DPMS: 873 * Legacy property for setting the power state of the connector. For atomic 874 * drivers this is only provided for backwards compatibility with existing 875 * drivers, it remaps to controlling the "ACTIVE" property on the CRTC the 876 * connector is linked to. Drivers should never set this property directly, 877 * it is handled by the DRM core by calling the &drm_connector_funcs.dpms 878 * callback. For atomic drivers the remapping to the "ACTIVE" property is 879 * implemented in the DRM core. This is the only standard connector 880 * property that userspace can change. 881 * 882 * Note that this property cannot be set through the MODE_ATOMIC ioctl, 883 * userspace must use "ACTIVE" on the CRTC instead. 884 * 885 * WARNING: 886 * 887 * For userspace also running on legacy drivers the "DPMS" semantics are a 888 * lot more complicated. First, userspace cannot rely on the "DPMS" value 889 * returned by the GETCONNECTOR actually reflecting reality, because many 890 * drivers fail to update it. For atomic drivers this is taken care of in 891 * drm_atomic_helper_update_legacy_modeset_state(). 892 * 893 * The second issue is that the DPMS state is only well-defined when the 894 * connector is connected to a CRTC. In atomic the DRM core enforces that 895 * "ACTIVE" is off in such a case, no such checks exists for "DPMS". 896 * 897 * Finally, when enabling an output using the legacy SETCONFIG ioctl then 898 * "DPMS" is forced to ON. But see above, that might not be reflected in 899 * the software value on legacy drivers. 900 * 901 * Summarizing: Only set "DPMS" when the connector is known to be enabled, 902 * assume that a successful SETCONFIG call also sets "DPMS" to on, and 903 * never read back the value of "DPMS" because it can be incorrect. 904 * PATH: 905 * Connector path property to identify how this sink is physically 906 * connected. Used by DP MST. This should be set by calling 907 * drm_connector_set_path_property(), in the case of DP MST with the 908 * path property the MST manager created. Userspace cannot change this 909 * property. 910 * TILE: 911 * Connector tile group property to indicate how a set of DRM connector 912 * compose together into one logical screen. This is used by both high-res 913 * external screens (often only using a single cable, but exposing multiple 914 * DP MST sinks), or high-res integrated panels (like dual-link DSI) which 915 * are not gen-locked. Note that for tiled panels which are genlocked, like 916 * dual-link LVDS or dual-link DSI, the driver should try to not expose the 917 * tiling and virtualize both &drm_crtc and &drm_plane if needed. Drivers 918 * should update this value using drm_connector_set_tile_property(). 919 * Userspace cannot change this property. 920 * link-status: 921 * Connector link-status property to indicate the status of link. The 922 * default value of link-status is "GOOD". If something fails during or 923 * after modeset, the kernel driver may set this to "BAD" and issue a 924 * hotplug uevent. Drivers should update this value using 925 * drm_connector_set_link_status_property(). 926 * non_desktop: 927 * Indicates the output should be ignored for purposes of displaying a 928 * standard desktop environment or console. This is most likely because 929 * the output device is not rectilinear. 930 * Content Protection: 931 * This property is used by userspace to request the kernel protect future 932 * content communicated over the link. When requested, kernel will apply 933 * the appropriate means of protection (most often HDCP), and use the 934 * property to tell userspace the protection is active. 935 * 936 * Drivers can set this up by calling 937 * drm_connector_attach_content_protection_property() on initialization. 938 * 939 * The value of this property can be one of the following: 940 * 941 * DRM_MODE_CONTENT_PROTECTION_UNDESIRED = 0 942 * The link is not protected, content is transmitted in the clear. 943 * DRM_MODE_CONTENT_PROTECTION_DESIRED = 1 944 * Userspace has requested content protection, but the link is not 945 * currently protected. When in this state, kernel should enable 946 * Content Protection as soon as possible. 947 * DRM_MODE_CONTENT_PROTECTION_ENABLED = 2 948 * Userspace has requested content protection, and the link is 949 * protected. Only the driver can set the property to this value. 950 * If userspace attempts to set to ENABLED, kernel will return 951 * -EINVAL. 952 * 953 * A few guidelines: 954 * 955 * - DESIRED state should be preserved until userspace de-asserts it by 956 * setting the property to UNDESIRED. This means ENABLED should only 957 * transition to UNDESIRED when the user explicitly requests it. 958 * - If the state is DESIRED, kernel should attempt to re-authenticate the 959 * link whenever possible. This includes across disable/enable, dpms, 960 * hotplug, downstream device changes, link status failures, etc.. 961 * - Userspace is responsible for polling the property to determine when 962 * the value transitions from ENABLED to DESIRED. This signifies the link 963 * is no longer protected and userspace should take appropriate action 964 * (whatever that might be). 965 * 966 * max bpc: 967 * This range property is used by userspace to limit the bit depth. When 968 * used the driver would limit the bpc in accordance with the valid range 969 * supported by the hardware and sink. Drivers to use the function 970 * drm_connector_attach_max_bpc_property() to create and attach the 971 * property to the connector during initialization. 972 * 973 * Connectors also have one standardized atomic property: 974 * 975 * CRTC_ID: 976 * Mode object ID of the &drm_crtc this connector should be connected to. 977 * 978 * Connectors for LCD panels may also have one standardized property: 979 * 980 * panel orientation: 981 * On some devices the LCD panel is mounted in the casing in such a way 982 * that the up/top side of the panel does not match with the top side of 983 * the device. Userspace can use this property to check for this. 984 * Note that input coordinates from touchscreens (input devices with 985 * INPUT_PROP_DIRECT) will still map 1:1 to the actual LCD panel 986 * coordinates, so if userspace rotates the picture to adjust for 987 * the orientation it must also apply the same transformation to the 988 * touchscreen input coordinates. This property is initialized by calling 989 * drm_connector_init_panel_orientation_property(). 990 * 991 * scaling mode: 992 * This property defines how a non-native mode is upscaled to the native 993 * mode of an LCD panel: 994 * 995 * None: 996 * No upscaling happens, scaling is left to the panel. Not all 997 * drivers expose this mode. 998 * Full: 999 * The output is upscaled to the full resolution of the panel, 1000 * ignoring the aspect ratio. 1001 * Center: 1002 * No upscaling happens, the output is centered within the native 1003 * resolution the panel. 1004 * Full aspect: 1005 * The output is upscaled to maximize either the width or height 1006 * while retaining the aspect ratio. 1007 * 1008 * This property should be set up by calling 1009 * drm_connector_attach_scaling_mode_property(). Note that drivers 1010 * can also expose this property to external outputs, in which case they 1011 * must support "None", which should be the default (since external screens 1012 * have a built-in scaler). 1013 */ 1014 1015 int drm_connector_create_standard_properties(struct drm_device *dev) 1016 { 1017 struct drm_property *prop; 1018 1019 prop = drm_property_create(dev, DRM_MODE_PROP_BLOB | 1020 DRM_MODE_PROP_IMMUTABLE, 1021 "EDID", 0); 1022 if (!prop) 1023 return -ENOMEM; 1024 dev->mode_config.edid_property = prop; 1025 1026 prop = drm_property_create_enum(dev, 0, 1027 "DPMS", drm_dpms_enum_list, 1028 ARRAY_SIZE(drm_dpms_enum_list)); 1029 if (!prop) 1030 return -ENOMEM; 1031 dev->mode_config.dpms_property = prop; 1032 1033 prop = drm_property_create(dev, 1034 DRM_MODE_PROP_BLOB | 1035 DRM_MODE_PROP_IMMUTABLE, 1036 "PATH", 0); 1037 if (!prop) 1038 return -ENOMEM; 1039 dev->mode_config.path_property = prop; 1040 1041 prop = drm_property_create(dev, 1042 DRM_MODE_PROP_BLOB | 1043 DRM_MODE_PROP_IMMUTABLE, 1044 "TILE", 0); 1045 if (!prop) 1046 return -ENOMEM; 1047 dev->mode_config.tile_property = prop; 1048 1049 prop = drm_property_create_enum(dev, 0, "link-status", 1050 drm_link_status_enum_list, 1051 ARRAY_SIZE(drm_link_status_enum_list)); 1052 if (!prop) 1053 return -ENOMEM; 1054 dev->mode_config.link_status_property = prop; 1055 1056 prop = drm_property_create_bool(dev, DRM_MODE_PROP_IMMUTABLE, "non-desktop"); 1057 if (!prop) 1058 return -ENOMEM; 1059 dev->mode_config.non_desktop_property = prop; 1060 1061 return 0; 1062 } 1063 1064 /** 1065 * drm_mode_create_dvi_i_properties - create DVI-I specific connector properties 1066 * @dev: DRM device 1067 * 1068 * Called by a driver the first time a DVI-I connector is made. 1069 */ 1070 int drm_mode_create_dvi_i_properties(struct drm_device *dev) 1071 { 1072 struct drm_property *dvi_i_selector; 1073 struct drm_property *dvi_i_subconnector; 1074 1075 if (dev->mode_config.dvi_i_select_subconnector_property) 1076 return 0; 1077 1078 dvi_i_selector = 1079 drm_property_create_enum(dev, 0, 1080 "select subconnector", 1081 drm_dvi_i_select_enum_list, 1082 ARRAY_SIZE(drm_dvi_i_select_enum_list)); 1083 dev->mode_config.dvi_i_select_subconnector_property = dvi_i_selector; 1084 1085 dvi_i_subconnector = drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE, 1086 "subconnector", 1087 drm_dvi_i_subconnector_enum_list, 1088 ARRAY_SIZE(drm_dvi_i_subconnector_enum_list)); 1089 dev->mode_config.dvi_i_subconnector_property = dvi_i_subconnector; 1090 1091 return 0; 1092 } 1093 EXPORT_SYMBOL(drm_mode_create_dvi_i_properties); 1094 1095 /** 1096 * DOC: HDMI connector properties 1097 * 1098 * content type (HDMI specific): 1099 * Indicates content type setting to be used in HDMI infoframes to indicate 1100 * content type for the external device, so that it adjusts its display 1101 * settings accordingly. 1102 * 1103 * The value of this property can be one of the following: 1104 * 1105 * No Data: 1106 * Content type is unknown 1107 * Graphics: 1108 * Content type is graphics 1109 * Photo: 1110 * Content type is photo 1111 * Cinema: 1112 * Content type is cinema 1113 * Game: 1114 * Content type is game 1115 * 1116 * Drivers can set up this property by calling 1117 * drm_connector_attach_content_type_property(). Decoding to 1118 * infoframe values is done through drm_hdmi_avi_infoframe_content_type(). 1119 */ 1120 1121 /** 1122 * drm_connector_attach_content_type_property - attach content-type property 1123 * @connector: connector to attach content type property on. 1124 * 1125 * Called by a driver the first time a HDMI connector is made. 1126 */ 1127 int drm_connector_attach_content_type_property(struct drm_connector *connector) 1128 { 1129 if (!drm_mode_create_content_type_property(connector->dev)) 1130 drm_object_attach_property(&connector->base, 1131 connector->dev->mode_config.content_type_property, 1132 DRM_MODE_CONTENT_TYPE_NO_DATA); 1133 return 0; 1134 } 1135 EXPORT_SYMBOL(drm_connector_attach_content_type_property); 1136 1137 1138 /** 1139 * drm_hdmi_avi_infoframe_content_type() - fill the HDMI AVI infoframe 1140 * content type information, based 1141 * on correspondent DRM property. 1142 * @frame: HDMI AVI infoframe 1143 * @conn_state: DRM display connector state 1144 * 1145 */ 1146 void drm_hdmi_avi_infoframe_content_type(struct hdmi_avi_infoframe *frame, 1147 const struct drm_connector_state *conn_state) 1148 { 1149 switch (conn_state->content_type) { 1150 case DRM_MODE_CONTENT_TYPE_GRAPHICS: 1151 frame->content_type = HDMI_CONTENT_TYPE_GRAPHICS; 1152 break; 1153 case DRM_MODE_CONTENT_TYPE_CINEMA: 1154 frame->content_type = HDMI_CONTENT_TYPE_CINEMA; 1155 break; 1156 case DRM_MODE_CONTENT_TYPE_GAME: 1157 frame->content_type = HDMI_CONTENT_TYPE_GAME; 1158 break; 1159 case DRM_MODE_CONTENT_TYPE_PHOTO: 1160 frame->content_type = HDMI_CONTENT_TYPE_PHOTO; 1161 break; 1162 default: 1163 /* Graphics is the default(0) */ 1164 frame->content_type = HDMI_CONTENT_TYPE_GRAPHICS; 1165 } 1166 1167 frame->itc = conn_state->content_type != DRM_MODE_CONTENT_TYPE_NO_DATA; 1168 } 1169 EXPORT_SYMBOL(drm_hdmi_avi_infoframe_content_type); 1170 1171 /** 1172 * drm_mode_attach_tv_margin_properties - attach TV connector margin properties 1173 * @connector: DRM connector 1174 * 1175 * Called by a driver when it needs to attach TV margin props to a connector. 1176 * Typically used on SDTV and HDMI connectors. 1177 */ 1178 void drm_connector_attach_tv_margin_properties(struct drm_connector *connector) 1179 { 1180 struct drm_device *dev = connector->dev; 1181 1182 drm_object_attach_property(&connector->base, 1183 dev->mode_config.tv_left_margin_property, 1184 0); 1185 drm_object_attach_property(&connector->base, 1186 dev->mode_config.tv_right_margin_property, 1187 0); 1188 drm_object_attach_property(&connector->base, 1189 dev->mode_config.tv_top_margin_property, 1190 0); 1191 drm_object_attach_property(&connector->base, 1192 dev->mode_config.tv_bottom_margin_property, 1193 0); 1194 } 1195 EXPORT_SYMBOL(drm_connector_attach_tv_margin_properties); 1196 1197 /** 1198 * drm_mode_create_tv_margin_properties - create TV connector margin properties 1199 * @dev: DRM device 1200 * 1201 * Called by a driver's HDMI connector initialization routine, this function 1202 * creates the TV margin properties for a given device. No need to call this 1203 * function for an SDTV connector, it's already called from 1204 * drm_mode_create_tv_properties(). 1205 */ 1206 int drm_mode_create_tv_margin_properties(struct drm_device *dev) 1207 { 1208 if (dev->mode_config.tv_left_margin_property) 1209 return 0; 1210 1211 dev->mode_config.tv_left_margin_property = 1212 drm_property_create_range(dev, 0, "left margin", 0, 100); 1213 if (!dev->mode_config.tv_left_margin_property) 1214 return -ENOMEM; 1215 1216 dev->mode_config.tv_right_margin_property = 1217 drm_property_create_range(dev, 0, "right margin", 0, 100); 1218 if (!dev->mode_config.tv_right_margin_property) 1219 return -ENOMEM; 1220 1221 dev->mode_config.tv_top_margin_property = 1222 drm_property_create_range(dev, 0, "top margin", 0, 100); 1223 if (!dev->mode_config.tv_top_margin_property) 1224 return -ENOMEM; 1225 1226 dev->mode_config.tv_bottom_margin_property = 1227 drm_property_create_range(dev, 0, "bottom margin", 0, 100); 1228 if (!dev->mode_config.tv_bottom_margin_property) 1229 return -ENOMEM; 1230 1231 return 0; 1232 } 1233 EXPORT_SYMBOL(drm_mode_create_tv_margin_properties); 1234 1235 /** 1236 * drm_mode_create_tv_properties - create TV specific connector properties 1237 * @dev: DRM device 1238 * @num_modes: number of different TV formats (modes) supported 1239 * @modes: array of pointers to strings containing name of each format 1240 * 1241 * Called by a driver's TV initialization routine, this function creates 1242 * the TV specific connector properties for a given device. Caller is 1243 * responsible for allocating a list of format names and passing them to 1244 * this routine. 1245 */ 1246 int drm_mode_create_tv_properties(struct drm_device *dev, 1247 unsigned int num_modes, 1248 const char * const modes[]) 1249 { 1250 struct drm_property *tv_selector; 1251 struct drm_property *tv_subconnector; 1252 unsigned int i; 1253 1254 if (dev->mode_config.tv_select_subconnector_property) 1255 return 0; 1256 1257 /* 1258 * Basic connector properties 1259 */ 1260 tv_selector = drm_property_create_enum(dev, 0, 1261 "select subconnector", 1262 drm_tv_select_enum_list, 1263 ARRAY_SIZE(drm_tv_select_enum_list)); 1264 if (!tv_selector) 1265 goto nomem; 1266 1267 dev->mode_config.tv_select_subconnector_property = tv_selector; 1268 1269 tv_subconnector = 1270 drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE, 1271 "subconnector", 1272 drm_tv_subconnector_enum_list, 1273 ARRAY_SIZE(drm_tv_subconnector_enum_list)); 1274 if (!tv_subconnector) 1275 goto nomem; 1276 dev->mode_config.tv_subconnector_property = tv_subconnector; 1277 1278 /* 1279 * Other, TV specific properties: margins & TV modes. 1280 */ 1281 if (drm_mode_create_tv_margin_properties(dev)) 1282 goto nomem; 1283 1284 dev->mode_config.tv_mode_property = 1285 drm_property_create(dev, DRM_MODE_PROP_ENUM, 1286 "mode", num_modes); 1287 if (!dev->mode_config.tv_mode_property) 1288 goto nomem; 1289 1290 for (i = 0; i < num_modes; i++) 1291 drm_property_add_enum(dev->mode_config.tv_mode_property, 1292 i, modes[i]); 1293 1294 dev->mode_config.tv_brightness_property = 1295 drm_property_create_range(dev, 0, "brightness", 0, 100); 1296 if (!dev->mode_config.tv_brightness_property) 1297 goto nomem; 1298 1299 dev->mode_config.tv_contrast_property = 1300 drm_property_create_range(dev, 0, "contrast", 0, 100); 1301 if (!dev->mode_config.tv_contrast_property) 1302 goto nomem; 1303 1304 dev->mode_config.tv_flicker_reduction_property = 1305 drm_property_create_range(dev, 0, "flicker reduction", 0, 100); 1306 if (!dev->mode_config.tv_flicker_reduction_property) 1307 goto nomem; 1308 1309 dev->mode_config.tv_overscan_property = 1310 drm_property_create_range(dev, 0, "overscan", 0, 100); 1311 if (!dev->mode_config.tv_overscan_property) 1312 goto nomem; 1313 1314 dev->mode_config.tv_saturation_property = 1315 drm_property_create_range(dev, 0, "saturation", 0, 100); 1316 if (!dev->mode_config.tv_saturation_property) 1317 goto nomem; 1318 1319 dev->mode_config.tv_hue_property = 1320 drm_property_create_range(dev, 0, "hue", 0, 100); 1321 if (!dev->mode_config.tv_hue_property) 1322 goto nomem; 1323 1324 return 0; 1325 nomem: 1326 return -ENOMEM; 1327 } 1328 EXPORT_SYMBOL(drm_mode_create_tv_properties); 1329 1330 /** 1331 * drm_mode_create_scaling_mode_property - create scaling mode property 1332 * @dev: DRM device 1333 * 1334 * Called by a driver the first time it's needed, must be attached to desired 1335 * connectors. 1336 * 1337 * Atomic drivers should use drm_connector_attach_scaling_mode_property() 1338 * instead to correctly assign &drm_connector_state.picture_aspect_ratio 1339 * in the atomic state. 1340 */ 1341 int drm_mode_create_scaling_mode_property(struct drm_device *dev) 1342 { 1343 struct drm_property *scaling_mode; 1344 1345 if (dev->mode_config.scaling_mode_property) 1346 return 0; 1347 1348 scaling_mode = 1349 drm_property_create_enum(dev, 0, "scaling mode", 1350 drm_scaling_mode_enum_list, 1351 ARRAY_SIZE(drm_scaling_mode_enum_list)); 1352 1353 dev->mode_config.scaling_mode_property = scaling_mode; 1354 1355 return 0; 1356 } 1357 EXPORT_SYMBOL(drm_mode_create_scaling_mode_property); 1358 1359 /** 1360 * DOC: Variable refresh properties 1361 * 1362 * Variable refresh rate capable displays can dynamically adjust their 1363 * refresh rate by extending the duration of their vertical front porch 1364 * until page flip or timeout occurs. This can reduce or remove stuttering 1365 * and latency in scenarios where the page flip does not align with the 1366 * vblank interval. 1367 * 1368 * An example scenario would be an application flipping at a constant rate 1369 * of 48Hz on a 60Hz display. The page flip will frequently miss the vblank 1370 * interval and the same contents will be displayed twice. This can be 1371 * observed as stuttering for content with motion. 1372 * 1373 * If variable refresh rate was active on a display that supported a 1374 * variable refresh range from 35Hz to 60Hz no stuttering would be observable 1375 * for the example scenario. The minimum supported variable refresh rate of 1376 * 35Hz is below the page flip frequency and the vertical front porch can 1377 * be extended until the page flip occurs. The vblank interval will be 1378 * directly aligned to the page flip rate. 1379 * 1380 * Not all userspace content is suitable for use with variable refresh rate. 1381 * Large and frequent changes in vertical front porch duration may worsen 1382 * perceived stuttering for input sensitive applications. 1383 * 1384 * Panel brightness will also vary with vertical front porch duration. Some 1385 * panels may have noticeable differences in brightness between the minimum 1386 * vertical front porch duration and the maximum vertical front porch duration. 1387 * Large and frequent changes in vertical front porch duration may produce 1388 * observable flickering for such panels. 1389 * 1390 * Userspace control for variable refresh rate is supported via properties 1391 * on the &drm_connector and &drm_crtc objects. 1392 * 1393 * "vrr_capable": 1394 * Optional &drm_connector boolean property that drivers should attach 1395 * with drm_connector_attach_vrr_capable_property() on connectors that 1396 * could support variable refresh rates. Drivers should update the 1397 * property value by calling drm_connector_set_vrr_capable_property(). 1398 * 1399 * Absence of the property should indicate absence of support. 1400 * 1401 * "VRR_ENABLED": 1402 * Default &drm_crtc boolean property that notifies the driver that the 1403 * content on the CRTC is suitable for variable refresh rate presentation. 1404 * The driver will take this property as a hint to enable variable 1405 * refresh rate support if the receiver supports it, ie. if the 1406 * "vrr_capable" property is true on the &drm_connector object. The 1407 * vertical front porch duration will be extended until page-flip or 1408 * timeout when enabled. 1409 * 1410 * The minimum vertical front porch duration is defined as the vertical 1411 * front porch duration for the current mode. 1412 * 1413 * The maximum vertical front porch duration is greater than or equal to 1414 * the minimum vertical front porch duration. The duration is derived 1415 * from the minimum supported variable refresh rate for the connector. 1416 * 1417 * The driver may place further restrictions within these minimum 1418 * and maximum bounds. 1419 */ 1420 1421 /** 1422 * drm_connector_attach_vrr_capable_property - creates the 1423 * vrr_capable property 1424 * @connector: connector to create the vrr_capable property on. 1425 * 1426 * This is used by atomic drivers to add support for querying 1427 * variable refresh rate capability for a connector. 1428 * 1429 * Returns: 1430 * Zero on success, negative errono on failure. 1431 */ 1432 int drm_connector_attach_vrr_capable_property( 1433 struct drm_connector *connector) 1434 { 1435 struct drm_device *dev = connector->dev; 1436 struct drm_property *prop; 1437 1438 if (!connector->vrr_capable_property) { 1439 prop = drm_property_create_bool(dev, DRM_MODE_PROP_IMMUTABLE, 1440 "vrr_capable"); 1441 if (!prop) 1442 return -ENOMEM; 1443 1444 connector->vrr_capable_property = prop; 1445 drm_object_attach_property(&connector->base, prop, 0); 1446 } 1447 1448 return 0; 1449 } 1450 EXPORT_SYMBOL(drm_connector_attach_vrr_capable_property); 1451 1452 /** 1453 * drm_connector_attach_scaling_mode_property - attach atomic scaling mode property 1454 * @connector: connector to attach scaling mode property on. 1455 * @scaling_mode_mask: or'ed mask of BIT(%DRM_MODE_SCALE_\*). 1456 * 1457 * This is used to add support for scaling mode to atomic drivers. 1458 * The scaling mode will be set to &drm_connector_state.picture_aspect_ratio 1459 * and can be used from &drm_connector_helper_funcs->atomic_check for validation. 1460 * 1461 * This is the atomic version of drm_mode_create_scaling_mode_property(). 1462 * 1463 * Returns: 1464 * Zero on success, negative errno on failure. 1465 */ 1466 int drm_connector_attach_scaling_mode_property(struct drm_connector *connector, 1467 u32 scaling_mode_mask) 1468 { 1469 struct drm_device *dev = connector->dev; 1470 struct drm_property *scaling_mode_property; 1471 int i; 1472 const unsigned valid_scaling_mode_mask = 1473 (1U << ARRAY_SIZE(drm_scaling_mode_enum_list)) - 1; 1474 1475 if (WARN_ON(hweight32(scaling_mode_mask) < 2 || 1476 scaling_mode_mask & ~valid_scaling_mode_mask)) 1477 return -EINVAL; 1478 1479 scaling_mode_property = 1480 drm_property_create(dev, DRM_MODE_PROP_ENUM, "scaling mode", 1481 hweight32(scaling_mode_mask)); 1482 1483 if (!scaling_mode_property) 1484 return -ENOMEM; 1485 1486 for (i = 0; i < ARRAY_SIZE(drm_scaling_mode_enum_list); i++) { 1487 int ret; 1488 1489 if (!(BIT(i) & scaling_mode_mask)) 1490 continue; 1491 1492 ret = drm_property_add_enum(scaling_mode_property, 1493 drm_scaling_mode_enum_list[i].type, 1494 drm_scaling_mode_enum_list[i].name); 1495 1496 if (ret) { 1497 drm_property_destroy(dev, scaling_mode_property); 1498 1499 return ret; 1500 } 1501 } 1502 1503 drm_object_attach_property(&connector->base, 1504 scaling_mode_property, 0); 1505 1506 connector->scaling_mode_property = scaling_mode_property; 1507 1508 return 0; 1509 } 1510 EXPORT_SYMBOL(drm_connector_attach_scaling_mode_property); 1511 1512 /** 1513 * drm_connector_attach_content_protection_property - attach content protection 1514 * property 1515 * 1516 * @connector: connector to attach CP property on. 1517 * 1518 * This is used to add support for content protection on select connectors. 1519 * Content Protection is intentionally vague to allow for different underlying 1520 * technologies, however it is most implemented by HDCP. 1521 * 1522 * The content protection will be set to &drm_connector_state.content_protection 1523 * 1524 * Returns: 1525 * Zero on success, negative errno on failure. 1526 */ 1527 int drm_connector_attach_content_protection_property( 1528 struct drm_connector *connector) 1529 { 1530 struct drm_device *dev = connector->dev; 1531 struct drm_property *prop; 1532 1533 prop = drm_property_create_enum(dev, 0, "Content Protection", 1534 drm_cp_enum_list, 1535 ARRAY_SIZE(drm_cp_enum_list)); 1536 if (!prop) 1537 return -ENOMEM; 1538 1539 drm_object_attach_property(&connector->base, prop, 1540 DRM_MODE_CONTENT_PROTECTION_UNDESIRED); 1541 1542 connector->content_protection_property = prop; 1543 1544 return 0; 1545 } 1546 EXPORT_SYMBOL(drm_connector_attach_content_protection_property); 1547 1548 /** 1549 * drm_mode_create_aspect_ratio_property - create aspect ratio property 1550 * @dev: DRM device 1551 * 1552 * Called by a driver the first time it's needed, must be attached to desired 1553 * connectors. 1554 * 1555 * Returns: 1556 * Zero on success, negative errno on failure. 1557 */ 1558 int drm_mode_create_aspect_ratio_property(struct drm_device *dev) 1559 { 1560 if (dev->mode_config.aspect_ratio_property) 1561 return 0; 1562 1563 dev->mode_config.aspect_ratio_property = 1564 drm_property_create_enum(dev, 0, "aspect ratio", 1565 drm_aspect_ratio_enum_list, 1566 ARRAY_SIZE(drm_aspect_ratio_enum_list)); 1567 1568 if (dev->mode_config.aspect_ratio_property == NULL) 1569 return -ENOMEM; 1570 1571 return 0; 1572 } 1573 EXPORT_SYMBOL(drm_mode_create_aspect_ratio_property); 1574 1575 /** 1576 * DOC: standard connector properties 1577 * 1578 * Colorspace: 1579 * drm_mode_create_colorspace_property - create colorspace property 1580 * This property helps select a suitable colorspace based on the sink 1581 * capability. Modern sink devices support wider gamut like BT2020. 1582 * This helps switch to BT2020 mode if the BT2020 encoded video stream 1583 * is being played by the user, same for any other colorspace. Thereby 1584 * giving a good visual experience to users. 1585 * 1586 * The expectation from userspace is that it should parse the EDID 1587 * and get supported colorspaces. Use this property and switch to the 1588 * one supported. Sink supported colorspaces should be retrieved by 1589 * userspace from EDID and driver will not explicitly expose them. 1590 * 1591 * Basically the expectation from userspace is: 1592 * - Set up CRTC DEGAMMA/CTM/GAMMA to convert to some sink 1593 * colorspace 1594 * - Set this new property to let the sink know what it 1595 * converted the CRTC output to. 1596 * - This property is just to inform sink what colorspace 1597 * source is trying to drive. 1598 * 1599 * Called by a driver the first time it's needed, must be attached to desired 1600 * connectors. 1601 */ 1602 int drm_mode_create_colorspace_property(struct drm_connector *connector) 1603 { 1604 struct drm_device *dev = connector->dev; 1605 struct drm_property *prop; 1606 1607 if (connector->connector_type == DRM_MODE_CONNECTOR_HDMIA || 1608 connector->connector_type == DRM_MODE_CONNECTOR_HDMIB) { 1609 prop = drm_property_create_enum(dev, DRM_MODE_PROP_ENUM, 1610 "Colorspace", 1611 hdmi_colorspaces, 1612 ARRAY_SIZE(hdmi_colorspaces)); 1613 if (!prop) 1614 return -ENOMEM; 1615 } else { 1616 DRM_DEBUG_KMS("Colorspace property not supported\n"); 1617 return 0; 1618 } 1619 1620 connector->colorspace_property = prop; 1621 1622 return 0; 1623 } 1624 EXPORT_SYMBOL(drm_mode_create_colorspace_property); 1625 1626 /** 1627 * drm_mode_create_content_type_property - create content type property 1628 * @dev: DRM device 1629 * 1630 * Called by a driver the first time it's needed, must be attached to desired 1631 * connectors. 1632 * 1633 * Returns: 1634 * Zero on success, negative errno on failure. 1635 */ 1636 int drm_mode_create_content_type_property(struct drm_device *dev) 1637 { 1638 if (dev->mode_config.content_type_property) 1639 return 0; 1640 1641 dev->mode_config.content_type_property = 1642 drm_property_create_enum(dev, 0, "content type", 1643 drm_content_type_enum_list, 1644 ARRAY_SIZE(drm_content_type_enum_list)); 1645 1646 if (dev->mode_config.content_type_property == NULL) 1647 return -ENOMEM; 1648 1649 return 0; 1650 } 1651 EXPORT_SYMBOL(drm_mode_create_content_type_property); 1652 1653 /** 1654 * drm_mode_create_suggested_offset_properties - create suggests offset properties 1655 * @dev: DRM device 1656 * 1657 * Create the the suggested x/y offset property for connectors. 1658 */ 1659 int drm_mode_create_suggested_offset_properties(struct drm_device *dev) 1660 { 1661 if (dev->mode_config.suggested_x_property && dev->mode_config.suggested_y_property) 1662 return 0; 1663 1664 dev->mode_config.suggested_x_property = 1665 drm_property_create_range(dev, DRM_MODE_PROP_IMMUTABLE, "suggested X", 0, 0xffffffff); 1666 1667 dev->mode_config.suggested_y_property = 1668 drm_property_create_range(dev, DRM_MODE_PROP_IMMUTABLE, "suggested Y", 0, 0xffffffff); 1669 1670 if (dev->mode_config.suggested_x_property == NULL || 1671 dev->mode_config.suggested_y_property == NULL) 1672 return -ENOMEM; 1673 return 0; 1674 } 1675 EXPORT_SYMBOL(drm_mode_create_suggested_offset_properties); 1676 1677 /** 1678 * drm_connector_set_path_property - set tile property on connector 1679 * @connector: connector to set property on. 1680 * @path: path to use for property; must not be NULL. 1681 * 1682 * This creates a property to expose to userspace to specify a 1683 * connector path. This is mainly used for DisplayPort MST where 1684 * connectors have a topology and we want to allow userspace to give 1685 * them more meaningful names. 1686 * 1687 * Returns: 1688 * Zero on success, negative errno on failure. 1689 */ 1690 int drm_connector_set_path_property(struct drm_connector *connector, 1691 const char *path) 1692 { 1693 struct drm_device *dev = connector->dev; 1694 int ret; 1695 1696 ret = drm_property_replace_global_blob(dev, 1697 &connector->path_blob_ptr, 1698 strlen(path) + 1, 1699 path, 1700 &connector->base, 1701 dev->mode_config.path_property); 1702 return ret; 1703 } 1704 EXPORT_SYMBOL(drm_connector_set_path_property); 1705 1706 /** 1707 * drm_connector_set_tile_property - set tile property on connector 1708 * @connector: connector to set property on. 1709 * 1710 * This looks up the tile information for a connector, and creates a 1711 * property for userspace to parse if it exists. The property is of 1712 * the form of 8 integers using ':' as a separator. 1713 * This is used for dual port tiled displays with DisplayPort SST 1714 * or DisplayPort MST connectors. 1715 * 1716 * Returns: 1717 * Zero on success, errno on failure. 1718 */ 1719 int drm_connector_set_tile_property(struct drm_connector *connector) 1720 { 1721 struct drm_device *dev = connector->dev; 1722 char tile[256]; 1723 int ret; 1724 1725 if (!connector->has_tile) { 1726 ret = drm_property_replace_global_blob(dev, 1727 &connector->tile_blob_ptr, 1728 0, 1729 NULL, 1730 &connector->base, 1731 dev->mode_config.tile_property); 1732 return ret; 1733 } 1734 1735 snprintf(tile, 256, "%d:%d:%d:%d:%d:%d:%d:%d", 1736 connector->tile_group->id, connector->tile_is_single_monitor, 1737 connector->num_h_tile, connector->num_v_tile, 1738 connector->tile_h_loc, connector->tile_v_loc, 1739 connector->tile_h_size, connector->tile_v_size); 1740 1741 ret = drm_property_replace_global_blob(dev, 1742 &connector->tile_blob_ptr, 1743 strlen(tile) + 1, 1744 tile, 1745 &connector->base, 1746 dev->mode_config.tile_property); 1747 return ret; 1748 } 1749 EXPORT_SYMBOL(drm_connector_set_tile_property); 1750 1751 /** 1752 * drm_connector_update_edid_property - update the edid property of a connector 1753 * @connector: drm connector 1754 * @edid: new value of the edid property 1755 * 1756 * This function creates a new blob modeset object and assigns its id to the 1757 * connector's edid property. 1758 * Since we also parse tile information from EDID's displayID block, we also 1759 * set the connector's tile property here. See drm_connector_set_tile_property() 1760 * for more details. 1761 * 1762 * Returns: 1763 * Zero on success, negative errno on failure. 1764 */ 1765 int drm_connector_update_edid_property(struct drm_connector *connector, 1766 const struct edid *edid) 1767 { 1768 struct drm_device *dev = connector->dev; 1769 size_t size = 0; 1770 int ret; 1771 1772 /* ignore requests to set edid when overridden */ 1773 if (connector->override_edid) 1774 return 0; 1775 1776 if (edid) 1777 size = EDID_LENGTH * (1 + edid->extensions); 1778 1779 /* Set the display info, using edid if available, otherwise 1780 * reseting the values to defaults. This duplicates the work 1781 * done in drm_add_edid_modes, but that function is not 1782 * consistently called before this one in all drivers and the 1783 * computation is cheap enough that it seems better to 1784 * duplicate it rather than attempt to ensure some arbitrary 1785 * ordering of calls. 1786 */ 1787 if (edid) 1788 drm_add_display_info(connector, edid); 1789 else 1790 drm_reset_display_info(connector); 1791 1792 drm_object_property_set_value(&connector->base, 1793 dev->mode_config.non_desktop_property, 1794 connector->display_info.non_desktop); 1795 1796 ret = drm_property_replace_global_blob(dev, 1797 &connector->edid_blob_ptr, 1798 size, 1799 edid, 1800 &connector->base, 1801 dev->mode_config.edid_property); 1802 if (ret) 1803 return ret; 1804 return drm_connector_set_tile_property(connector); 1805 } 1806 EXPORT_SYMBOL(drm_connector_update_edid_property); 1807 1808 /** 1809 * drm_connector_set_link_status_property - Set link status property of a connector 1810 * @connector: drm connector 1811 * @link_status: new value of link status property (0: Good, 1: Bad) 1812 * 1813 * In usual working scenario, this link status property will always be set to 1814 * "GOOD". If something fails during or after a mode set, the kernel driver 1815 * may set this link status property to "BAD". The caller then needs to send a 1816 * hotplug uevent for userspace to re-check the valid modes through 1817 * GET_CONNECTOR_IOCTL and retry modeset. 1818 * 1819 * Note: Drivers cannot rely on userspace to support this property and 1820 * issue a modeset. As such, they may choose to handle issues (like 1821 * re-training a link) without userspace's intervention. 1822 * 1823 * The reason for adding this property is to handle link training failures, but 1824 * it is not limited to DP or link training. For example, if we implement 1825 * asynchronous setcrtc, this property can be used to report any failures in that. 1826 */ 1827 void drm_connector_set_link_status_property(struct drm_connector *connector, 1828 uint64_t link_status) 1829 { 1830 struct drm_device *dev = connector->dev; 1831 1832 drm_modeset_lock(&dev->mode_config.connection_mutex, NULL); 1833 connector->state->link_status = link_status; 1834 drm_modeset_unlock(&dev->mode_config.connection_mutex); 1835 } 1836 EXPORT_SYMBOL(drm_connector_set_link_status_property); 1837 1838 /** 1839 * drm_connector_attach_max_bpc_property - attach "max bpc" property 1840 * @connector: connector to attach max bpc property on. 1841 * @min: The minimum bit depth supported by the connector. 1842 * @max: The maximum bit depth supported by the connector. 1843 * 1844 * This is used to add support for limiting the bit depth on a connector. 1845 * 1846 * Returns: 1847 * Zero on success, negative errno on failure. 1848 */ 1849 int drm_connector_attach_max_bpc_property(struct drm_connector *connector, 1850 int min, int max) 1851 { 1852 struct drm_device *dev = connector->dev; 1853 struct drm_property *prop; 1854 1855 prop = connector->max_bpc_property; 1856 if (!prop) { 1857 prop = drm_property_create_range(dev, 0, "max bpc", min, max); 1858 if (!prop) 1859 return -ENOMEM; 1860 1861 connector->max_bpc_property = prop; 1862 } 1863 1864 drm_object_attach_property(&connector->base, prop, max); 1865 connector->state->max_requested_bpc = max; 1866 connector->state->max_bpc = max; 1867 1868 return 0; 1869 } 1870 EXPORT_SYMBOL(drm_connector_attach_max_bpc_property); 1871 1872 /** 1873 * drm_connector_set_vrr_capable_property - sets the variable refresh rate 1874 * capable property for a connector 1875 * @connector: drm connector 1876 * @capable: True if the connector is variable refresh rate capable 1877 * 1878 * Should be used by atomic drivers to update the indicated support for 1879 * variable refresh rate over a connector. 1880 */ 1881 void drm_connector_set_vrr_capable_property( 1882 struct drm_connector *connector, bool capable) 1883 { 1884 drm_object_property_set_value(&connector->base, 1885 connector->vrr_capable_property, 1886 capable); 1887 } 1888 EXPORT_SYMBOL(drm_connector_set_vrr_capable_property); 1889 1890 /** 1891 * drm_connector_init_panel_orientation_property - 1892 * initialize the connecters panel_orientation property 1893 * @connector: connector for which to init the panel-orientation property. 1894 * @width: width in pixels of the panel, used for panel quirk detection 1895 * @height: height in pixels of the panel, used for panel quirk detection 1896 * 1897 * This function should only be called for built-in panels, after setting 1898 * connector->display_info.panel_orientation first (if known). 1899 * 1900 * This function will check for platform specific (e.g. DMI based) quirks 1901 * overriding display_info.panel_orientation first, then if panel_orientation 1902 * is not DRM_MODE_PANEL_ORIENTATION_UNKNOWN it will attach the 1903 * "panel orientation" property to the connector. 1904 * 1905 * Returns: 1906 * Zero on success, negative errno on failure. 1907 */ 1908 int drm_connector_init_panel_orientation_property( 1909 struct drm_connector *connector, int width, int height) 1910 { 1911 struct drm_device *dev = connector->dev; 1912 struct drm_display_info *info = &connector->display_info; 1913 struct drm_property *prop; 1914 int orientation_quirk; 1915 1916 orientation_quirk = drm_get_panel_orientation_quirk(width, height); 1917 if (orientation_quirk != DRM_MODE_PANEL_ORIENTATION_UNKNOWN) 1918 info->panel_orientation = orientation_quirk; 1919 1920 if (info->panel_orientation == DRM_MODE_PANEL_ORIENTATION_UNKNOWN) 1921 return 0; 1922 1923 prop = dev->mode_config.panel_orientation_property; 1924 if (!prop) { 1925 prop = drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE, 1926 "panel orientation", 1927 drm_panel_orientation_enum_list, 1928 ARRAY_SIZE(drm_panel_orientation_enum_list)); 1929 if (!prop) 1930 return -ENOMEM; 1931 1932 dev->mode_config.panel_orientation_property = prop; 1933 } 1934 1935 drm_object_attach_property(&connector->base, prop, 1936 info->panel_orientation); 1937 return 0; 1938 } 1939 EXPORT_SYMBOL(drm_connector_init_panel_orientation_property); 1940 1941 int drm_connector_set_obj_prop(struct drm_mode_object *obj, 1942 struct drm_property *property, 1943 uint64_t value) 1944 { 1945 int ret = -EINVAL; 1946 struct drm_connector *connector = obj_to_connector(obj); 1947 1948 /* Do DPMS ourselves */ 1949 if (property == connector->dev->mode_config.dpms_property) { 1950 ret = (*connector->funcs->dpms)(connector, (int)value); 1951 } else if (connector->funcs->set_property) 1952 ret = connector->funcs->set_property(connector, property, value); 1953 1954 if (!ret) 1955 drm_object_property_set_value(&connector->base, property, value); 1956 return ret; 1957 } 1958 1959 int drm_connector_property_set_ioctl(struct drm_device *dev, 1960 void *data, struct drm_file *file_priv) 1961 { 1962 struct drm_mode_connector_set_property *conn_set_prop = data; 1963 struct drm_mode_obj_set_property obj_set_prop = { 1964 .value = conn_set_prop->value, 1965 .prop_id = conn_set_prop->prop_id, 1966 .obj_id = conn_set_prop->connector_id, 1967 .obj_type = DRM_MODE_OBJECT_CONNECTOR 1968 }; 1969 1970 /* It does all the locking and checking we need */ 1971 return drm_mode_obj_set_property_ioctl(dev, &obj_set_prop, file_priv); 1972 } 1973 1974 static struct drm_encoder *drm_connector_get_encoder(struct drm_connector *connector) 1975 { 1976 /* For atomic drivers only state objects are synchronously updated and 1977 * protected by modeset locks, so check those first. */ 1978 if (connector->state) 1979 return connector->state->best_encoder; 1980 return connector->encoder; 1981 } 1982 1983 static bool 1984 drm_mode_expose_to_userspace(const struct drm_display_mode *mode, 1985 const struct list_head *export_list, 1986 const struct drm_file *file_priv) 1987 { 1988 /* 1989 * If user-space hasn't configured the driver to expose the stereo 3D 1990 * modes, don't expose them. 1991 */ 1992 if (!file_priv->stereo_allowed && drm_mode_is_stereo(mode)) 1993 return false; 1994 /* 1995 * If user-space hasn't configured the driver to expose the modes 1996 * with aspect-ratio, don't expose them. However if such a mode 1997 * is unique, let it be exposed, but reset the aspect-ratio flags 1998 * while preparing the list of user-modes. 1999 */ 2000 if (!file_priv->aspect_ratio_allowed) { 2001 struct drm_display_mode *mode_itr; 2002 2003 list_for_each_entry(mode_itr, export_list, export_head) 2004 if (drm_mode_match(mode_itr, mode, 2005 DRM_MODE_MATCH_TIMINGS | 2006 DRM_MODE_MATCH_CLOCK | 2007 DRM_MODE_MATCH_FLAGS | 2008 DRM_MODE_MATCH_3D_FLAGS)) 2009 return false; 2010 } 2011 2012 return true; 2013 } 2014 2015 int drm_mode_getconnector(struct drm_device *dev, void *data, 2016 struct drm_file *file_priv) 2017 { 2018 struct drm_mode_get_connector *out_resp = data; 2019 struct drm_connector *connector; 2020 struct drm_encoder *encoder; 2021 struct drm_display_mode *mode; 2022 int mode_count = 0; 2023 int encoders_count = 0; 2024 int ret = 0; 2025 int copied = 0; 2026 int i; 2027 struct drm_mode_modeinfo u_mode; 2028 struct drm_mode_modeinfo __user *mode_ptr; 2029 uint32_t __user *encoder_ptr; 2030 LIST_HEAD(export_list); 2031 2032 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 2033 return -EOPNOTSUPP; 2034 2035 memset(&u_mode, 0, sizeof(struct drm_mode_modeinfo)); 2036 2037 connector = drm_connector_lookup(dev, file_priv, out_resp->connector_id); 2038 if (!connector) 2039 return -ENOENT; 2040 2041 drm_connector_for_each_possible_encoder(connector, encoder, i) 2042 encoders_count++; 2043 2044 if ((out_resp->count_encoders >= encoders_count) && encoders_count) { 2045 copied = 0; 2046 encoder_ptr = (uint32_t __user *)(unsigned long)(out_resp->encoders_ptr); 2047 2048 drm_connector_for_each_possible_encoder(connector, encoder, i) { 2049 if (put_user(encoder->base.id, encoder_ptr + copied)) { 2050 ret = -EFAULT; 2051 goto out; 2052 } 2053 copied++; 2054 } 2055 } 2056 out_resp->count_encoders = encoders_count; 2057 2058 out_resp->connector_id = connector->base.id; 2059 out_resp->connector_type = connector->connector_type; 2060 out_resp->connector_type_id = connector->connector_type_id; 2061 2062 mutex_lock(&dev->mode_config.mutex); 2063 if (out_resp->count_modes == 0) { 2064 connector->funcs->fill_modes(connector, 2065 dev->mode_config.max_width, 2066 dev->mode_config.max_height); 2067 } 2068 2069 out_resp->mm_width = connector->display_info.width_mm; 2070 out_resp->mm_height = connector->display_info.height_mm; 2071 out_resp->subpixel = connector->display_info.subpixel_order; 2072 out_resp->connection = connector->status; 2073 2074 /* delayed so we get modes regardless of pre-fill_modes state */ 2075 list_for_each_entry(mode, &connector->modes, head) 2076 if (drm_mode_expose_to_userspace(mode, &export_list, 2077 file_priv)) { 2078 list_add_tail(&mode->export_head, &export_list); 2079 mode_count++; 2080 } 2081 2082 /* 2083 * This ioctl is called twice, once to determine how much space is 2084 * needed, and the 2nd time to fill it. 2085 * The modes that need to be exposed to the user are maintained in the 2086 * 'export_list'. When the ioctl is called first time to determine the, 2087 * space, the export_list gets filled, to find the no.of modes. In the 2088 * 2nd time, the user modes are filled, one by one from the export_list. 2089 */ 2090 if ((out_resp->count_modes >= mode_count) && mode_count) { 2091 copied = 0; 2092 mode_ptr = (struct drm_mode_modeinfo __user *)(unsigned long)out_resp->modes_ptr; 2093 list_for_each_entry(mode, &export_list, export_head) { 2094 drm_mode_convert_to_umode(&u_mode, mode); 2095 /* 2096 * Reset aspect ratio flags of user-mode, if modes with 2097 * aspect-ratio are not supported. 2098 */ 2099 if (!file_priv->aspect_ratio_allowed) 2100 u_mode.flags &= ~DRM_MODE_FLAG_PIC_AR_MASK; 2101 if (copy_to_user(mode_ptr + copied, 2102 &u_mode, sizeof(u_mode))) { 2103 ret = -EFAULT; 2104 mutex_unlock(&dev->mode_config.mutex); 2105 2106 goto out; 2107 } 2108 copied++; 2109 } 2110 } 2111 out_resp->count_modes = mode_count; 2112 mutex_unlock(&dev->mode_config.mutex); 2113 2114 drm_modeset_lock(&dev->mode_config.connection_mutex, NULL); 2115 encoder = drm_connector_get_encoder(connector); 2116 if (encoder) 2117 out_resp->encoder_id = encoder->base.id; 2118 else 2119 out_resp->encoder_id = 0; 2120 2121 /* Only grab properties after probing, to make sure EDID and other 2122 * properties reflect the latest status. */ 2123 ret = drm_mode_object_get_properties(&connector->base, file_priv->atomic, 2124 (uint32_t __user *)(unsigned long)(out_resp->props_ptr), 2125 (uint64_t __user *)(unsigned long)(out_resp->prop_values_ptr), 2126 &out_resp->count_props); 2127 drm_modeset_unlock(&dev->mode_config.connection_mutex); 2128 2129 out: 2130 drm_connector_put(connector); 2131 2132 return ret; 2133 } 2134 2135 2136 /** 2137 * DOC: Tile group 2138 * 2139 * Tile groups are used to represent tiled monitors with a unique integer 2140 * identifier. Tiled monitors using DisplayID v1.3 have a unique 8-byte handle, 2141 * we store this in a tile group, so we have a common identifier for all tiles 2142 * in a monitor group. The property is called "TILE". Drivers can manage tile 2143 * groups using drm_mode_create_tile_group(), drm_mode_put_tile_group() and 2144 * drm_mode_get_tile_group(). But this is only needed for internal panels where 2145 * the tile group information is exposed through a non-standard way. 2146 */ 2147 2148 static void drm_tile_group_free(struct kref *kref) 2149 { 2150 struct drm_tile_group *tg = container_of(kref, struct drm_tile_group, refcount); 2151 struct drm_device *dev = tg->dev; 2152 mutex_lock(&dev->mode_config.idr_mutex); 2153 idr_remove(&dev->mode_config.tile_idr, tg->id); 2154 mutex_unlock(&dev->mode_config.idr_mutex); 2155 kfree(tg); 2156 } 2157 2158 /** 2159 * drm_mode_put_tile_group - drop a reference to a tile group. 2160 * @dev: DRM device 2161 * @tg: tile group to drop reference to. 2162 * 2163 * drop reference to tile group and free if 0. 2164 */ 2165 void drm_mode_put_tile_group(struct drm_device *dev, 2166 struct drm_tile_group *tg) 2167 { 2168 kref_put(&tg->refcount, drm_tile_group_free); 2169 } 2170 EXPORT_SYMBOL(drm_mode_put_tile_group); 2171 2172 /** 2173 * drm_mode_get_tile_group - get a reference to an existing tile group 2174 * @dev: DRM device 2175 * @topology: 8-bytes unique per monitor. 2176 * 2177 * Use the unique bytes to get a reference to an existing tile group. 2178 * 2179 * RETURNS: 2180 * tile group or NULL if not found. 2181 */ 2182 struct drm_tile_group *drm_mode_get_tile_group(struct drm_device *dev, 2183 char topology[8]) 2184 { 2185 struct drm_tile_group *tg; 2186 int id; 2187 mutex_lock(&dev->mode_config.idr_mutex); 2188 idr_for_each_entry(&dev->mode_config.tile_idr, tg, id) { 2189 if (!memcmp(tg->group_data, topology, 8)) { 2190 if (!kref_get_unless_zero(&tg->refcount)) 2191 tg = NULL; 2192 mutex_unlock(&dev->mode_config.idr_mutex); 2193 return tg; 2194 } 2195 } 2196 mutex_unlock(&dev->mode_config.idr_mutex); 2197 return NULL; 2198 } 2199 EXPORT_SYMBOL(drm_mode_get_tile_group); 2200 2201 /** 2202 * drm_mode_create_tile_group - create a tile group from a displayid description 2203 * @dev: DRM device 2204 * @topology: 8-bytes unique per monitor. 2205 * 2206 * Create a tile group for the unique monitor, and get a unique 2207 * identifier for the tile group. 2208 * 2209 * RETURNS: 2210 * new tile group or NULL. 2211 */ 2212 struct drm_tile_group *drm_mode_create_tile_group(struct drm_device *dev, 2213 char topology[8]) 2214 { 2215 struct drm_tile_group *tg; 2216 int ret; 2217 2218 tg = kzalloc(sizeof(*tg), GFP_KERNEL); 2219 if (!tg) 2220 return NULL; 2221 2222 kref_init(&tg->refcount); 2223 memcpy(tg->group_data, topology, 8); 2224 tg->dev = dev; 2225 2226 mutex_lock(&dev->mode_config.idr_mutex); 2227 ret = idr_alloc(&dev->mode_config.tile_idr, tg, 1, 0, GFP_KERNEL); 2228 if (ret >= 0) { 2229 tg->id = ret; 2230 } else { 2231 kfree(tg); 2232 tg = NULL; 2233 } 2234 2235 mutex_unlock(&dev->mode_config.idr_mutex); 2236 return tg; 2237 } 2238 EXPORT_SYMBOL(drm_mode_create_tile_group); 2239