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 #ifndef __DRM_CONNECTOR_H__ 24 #define __DRM_CONNECTOR_H__ 25 26 #include <linux/list.h> 27 #include <linux/ctype.h> 28 #include <drm/drm_mode_object.h> 29 30 #include <uapi/drm/drm_mode.h> 31 32 struct drm_device; 33 34 struct drm_connector_helper_funcs; 35 struct drm_device; 36 struct drm_crtc; 37 struct drm_encoder; 38 struct drm_property; 39 struct drm_property_blob; 40 struct drm_printer; 41 struct edid; 42 43 enum drm_connector_force { 44 DRM_FORCE_UNSPECIFIED, 45 DRM_FORCE_OFF, 46 DRM_FORCE_ON, /* force on analog part normally */ 47 DRM_FORCE_ON_DIGITAL, /* for DVI-I use digital connector */ 48 }; 49 50 /** 51 * enum drm_connector_status - status for a &drm_connector 52 * 53 * This enum is used to track the connector status. There are no separate 54 * #defines for the uapi! 55 */ 56 enum drm_connector_status { 57 /** 58 * @connector_status_connected: The connector is definitely connected to 59 * a sink device, and can be enabled. 60 */ 61 connector_status_connected = 1, 62 /** 63 * @connector_status_disconnected: The connector isn't connected to a 64 * sink device which can be autodetect. For digital outputs like DP or 65 * HDMI (which can be realiable probed) this means there's really 66 * nothing there. It is driver-dependent whether a connector with this 67 * status can be lit up or not. 68 */ 69 connector_status_disconnected = 2, 70 /** 71 * @connector_status_unknown: The connector's status could not be 72 * reliably detected. This happens when probing would either cause 73 * flicker (like load-detection when the connector is in use), or when a 74 * hardware resource isn't available (like when load-detection needs a 75 * free CRTC). It should be possible to light up the connector with one 76 * of the listed fallback modes. For default configuration userspace 77 * should only try to light up connectors with unknown status when 78 * there's not connector with @connector_status_connected. 79 */ 80 connector_status_unknown = 3, 81 }; 82 83 enum subpixel_order { 84 SubPixelUnknown = 0, 85 SubPixelHorizontalRGB, 86 SubPixelHorizontalBGR, 87 SubPixelVerticalRGB, 88 SubPixelVerticalBGR, 89 SubPixelNone, 90 91 }; 92 93 /** 94 * struct drm_scrambling: sink's scrambling support. 95 */ 96 struct drm_scrambling { 97 /** 98 * @supported: scrambling supported for rates > 340 Mhz. 99 */ 100 bool supported; 101 /** 102 * @low_rates: scrambling supported for rates <= 340 Mhz. 103 */ 104 bool low_rates; 105 }; 106 107 /* 108 * struct drm_scdc - Information about scdc capabilities of a HDMI 2.0 sink 109 * 110 * Provides SCDC register support and capabilities related information on a 111 * HDMI 2.0 sink. In case of a HDMI 1.4 sink, all parameter must be 0. 112 */ 113 struct drm_scdc { 114 /** 115 * @supported: status control & data channel present. 116 */ 117 bool supported; 118 /** 119 * @read_request: sink is capable of generating scdc read request. 120 */ 121 bool read_request; 122 /** 123 * @scrambling: sink's scrambling capabilities 124 */ 125 struct drm_scrambling scrambling; 126 }; 127 128 129 /** 130 * struct drm_hdmi_info - runtime information about the connected HDMI sink 131 * 132 * Describes if a given display supports advanced HDMI 2.0 features. 133 * This information is available in CEA-861-F extension blocks (like HF-VSDB). 134 */ 135 struct drm_hdmi_info { 136 struct drm_scdc scdc; 137 }; 138 139 /** 140 * enum drm_link_status - connector's link_status property value 141 * 142 * This enum is used as the connector's link status property value. 143 * It is set to the values defined in uapi. 144 * 145 * @DRM_LINK_STATUS_GOOD: DP Link is Good as a result of successful 146 * link training 147 * @DRM_LINK_STATUS_BAD: DP Link is BAD as a result of link training 148 * failure 149 */ 150 enum drm_link_status { 151 DRM_LINK_STATUS_GOOD = DRM_MODE_LINK_STATUS_GOOD, 152 DRM_LINK_STATUS_BAD = DRM_MODE_LINK_STATUS_BAD, 153 }; 154 155 /** 156 * struct drm_display_info - runtime data about the connected sink 157 * 158 * Describes a given display (e.g. CRT or flat panel) and its limitations. For 159 * fixed display sinks like built-in panels there's not much difference between 160 * this and &struct drm_connector. But for sinks with a real cable this 161 * structure is meant to describe all the things at the other end of the cable. 162 * 163 * For sinks which provide an EDID this can be filled out by calling 164 * drm_add_edid_modes(). 165 */ 166 struct drm_display_info { 167 /** 168 * @name: Name of the display. 169 */ 170 char name[DRM_DISPLAY_INFO_LEN]; 171 172 /** 173 * @width_mm: Physical width in mm. 174 */ 175 unsigned int width_mm; 176 /** 177 * @height_mm: Physical height in mm. 178 */ 179 unsigned int height_mm; 180 181 /** 182 * @pixel_clock: Maximum pixel clock supported by the sink, in units of 183 * 100Hz. This mismatches the clock in &drm_display_mode (which is in 184 * kHZ), because that's what the EDID uses as base unit. 185 */ 186 unsigned int pixel_clock; 187 /** 188 * @bpc: Maximum bits per color channel. Used by HDMI and DP outputs. 189 */ 190 unsigned int bpc; 191 192 /** 193 * @subpixel_order: Subpixel order of LCD panels. 194 */ 195 enum subpixel_order subpixel_order; 196 197 #define DRM_COLOR_FORMAT_RGB444 (1<<0) 198 #define DRM_COLOR_FORMAT_YCRCB444 (1<<1) 199 #define DRM_COLOR_FORMAT_YCRCB422 (1<<2) 200 201 /** 202 * @color_formats: HDMI Color formats, selects between RGB and YCrCb 203 * modes. Used DRM_COLOR_FORMAT\_ defines, which are _not_ the same ones 204 * as used to describe the pixel format in framebuffers, and also don't 205 * match the formats in @bus_formats which are shared with v4l. 206 */ 207 u32 color_formats; 208 209 /** 210 * @bus_formats: Pixel data format on the wire, somewhat redundant with 211 * @color_formats. Array of size @num_bus_formats encoded using 212 * MEDIA_BUS_FMT\_ defines shared with v4l and media drivers. 213 */ 214 const u32 *bus_formats; 215 /** 216 * @num_bus_formats: Size of @bus_formats array. 217 */ 218 unsigned int num_bus_formats; 219 220 #define DRM_BUS_FLAG_DE_LOW (1<<0) 221 #define DRM_BUS_FLAG_DE_HIGH (1<<1) 222 /* drive data on pos. edge */ 223 #define DRM_BUS_FLAG_PIXDATA_POSEDGE (1<<2) 224 /* drive data on neg. edge */ 225 #define DRM_BUS_FLAG_PIXDATA_NEGEDGE (1<<3) 226 227 /** 228 * @bus_flags: Additional information (like pixel signal polarity) for 229 * the pixel data on the bus, using DRM_BUS_FLAGS\_ defines. 230 */ 231 u32 bus_flags; 232 233 /** 234 * @max_tmds_clock: Maximum TMDS clock rate supported by the 235 * sink in kHz. 0 means undefined. 236 */ 237 int max_tmds_clock; 238 239 /** 240 * @dvi_dual: Dual-link DVI sink? 241 */ 242 bool dvi_dual; 243 244 /** 245 * @edid_hdmi_dc_modes: Mask of supported hdmi deep color modes. Even 246 * more stuff redundant with @bus_formats. 247 */ 248 u8 edid_hdmi_dc_modes; 249 250 /** 251 * @cea_rev: CEA revision of the HDMI sink. 252 */ 253 u8 cea_rev; 254 255 /** 256 * @hdmi: advance features of a HDMI sink. 257 */ 258 struct drm_hdmi_info hdmi; 259 }; 260 261 int drm_display_info_set_bus_formats(struct drm_display_info *info, 262 const u32 *formats, 263 unsigned int num_formats); 264 265 /** 266 * struct drm_tv_connector_state - TV connector related states 267 * @subconnector: selected subconnector 268 * @margins: left/right/top/bottom margins 269 * @mode: TV mode 270 * @brightness: brightness in percent 271 * @contrast: contrast in percent 272 * @flicker_reduction: flicker reduction in percent 273 * @overscan: overscan in percent 274 * @saturation: saturation in percent 275 * @hue: hue in percent 276 */ 277 struct drm_tv_connector_state { 278 enum drm_mode_subconnector subconnector; 279 struct { 280 unsigned int left; 281 unsigned int right; 282 unsigned int top; 283 unsigned int bottom; 284 } margins; 285 unsigned int mode; 286 unsigned int brightness; 287 unsigned int contrast; 288 unsigned int flicker_reduction; 289 unsigned int overscan; 290 unsigned int saturation; 291 unsigned int hue; 292 }; 293 294 /** 295 * struct drm_connector_state - mutable connector state 296 * @connector: backpointer to the connector 297 * @best_encoder: can be used by helpers and drivers to select the encoder 298 * @state: backpointer to global drm_atomic_state 299 * @tv: TV connector state 300 */ 301 struct drm_connector_state { 302 struct drm_connector *connector; 303 304 /** 305 * @crtc: CRTC to connect connector to, NULL if disabled. 306 * 307 * Do not change this directly, use drm_atomic_set_crtc_for_connector() 308 * instead. 309 */ 310 struct drm_crtc *crtc; 311 312 struct drm_encoder *best_encoder; 313 314 /** 315 * @link_status: Connector link_status to keep track of whether link is 316 * GOOD or BAD to notify userspace if retraining is necessary. 317 */ 318 enum drm_link_status link_status; 319 320 struct drm_atomic_state *state; 321 322 struct drm_tv_connector_state tv; 323 }; 324 325 /** 326 * struct drm_connector_funcs - control connectors on a given device 327 * 328 * Each CRTC may have one or more connectors attached to it. The functions 329 * below allow the core DRM code to control connectors, enumerate available modes, 330 * etc. 331 */ 332 struct drm_connector_funcs { 333 /** 334 * @dpms: 335 * 336 * Legacy entry point to set the per-connector DPMS state. Legacy DPMS 337 * is exposed as a standard property on the connector, but diverted to 338 * this callback in the drm core. Note that atomic drivers don't 339 * implement the 4 level DPMS support on the connector any more, but 340 * instead only have an on/off "ACTIVE" property on the CRTC object. 341 * 342 * Drivers implementing atomic modeset should use 343 * drm_atomic_helper_connector_dpms() to implement this hook. 344 * 345 * RETURNS: 346 * 347 * 0 on success or a negative error code on failure. 348 */ 349 int (*dpms)(struct drm_connector *connector, int mode); 350 351 /** 352 * @reset: 353 * 354 * Reset connector hardware and software state to off. This function isn't 355 * called by the core directly, only through drm_mode_config_reset(). 356 * It's not a helper hook only for historical reasons. 357 * 358 * Atomic drivers can use drm_atomic_helper_connector_reset() to reset 359 * atomic state using this hook. 360 */ 361 void (*reset)(struct drm_connector *connector); 362 363 /** 364 * @detect: 365 * 366 * Check to see if anything is attached to the connector. The parameter 367 * force is set to false whilst polling, true when checking the 368 * connector due to a user request. force can be used by the driver to 369 * avoid expensive, destructive operations during automated probing. 370 * 371 * This callback is optional, if not implemented the connector will be 372 * considered as always being attached. 373 * 374 * FIXME: 375 * 376 * Note that this hook is only called by the probe helper. It's not in 377 * the helper library vtable purely for historical reasons. The only DRM 378 * core entry point to probe connector state is @fill_modes. 379 * 380 * RETURNS: 381 * 382 * drm_connector_status indicating the connector's status. 383 */ 384 enum drm_connector_status (*detect)(struct drm_connector *connector, 385 bool force); 386 387 /** 388 * @force: 389 * 390 * This function is called to update internal encoder state when the 391 * connector is forced to a certain state by userspace, either through 392 * the sysfs interfaces or on the kernel cmdline. In that case the 393 * @detect callback isn't called. 394 * 395 * FIXME: 396 * 397 * Note that this hook is only called by the probe helper. It's not in 398 * the helper library vtable purely for historical reasons. The only DRM 399 * core entry point to probe connector state is @fill_modes. 400 */ 401 void (*force)(struct drm_connector *connector); 402 403 /** 404 * @fill_modes: 405 * 406 * Entry point for output detection and basic mode validation. The 407 * driver should reprobe the output if needed (e.g. when hotplug 408 * handling is unreliable), add all detected modes to &drm_connector.modes 409 * and filter out any the device can't support in any configuration. It 410 * also needs to filter out any modes wider or higher than the 411 * parameters max_width and max_height indicate. 412 * 413 * The drivers must also prune any modes no longer valid from 414 * &drm_connector.modes. Furthermore it must update 415 * &drm_connector.status and &drm_connector.edid. If no EDID has been 416 * received for this output connector->edid must be NULL. 417 * 418 * Drivers using the probe helpers should use 419 * drm_helper_probe_single_connector_modes() or 420 * drm_helper_probe_single_connector_modes_nomerge() to implement this 421 * function. 422 * 423 * RETURNS: 424 * 425 * The number of modes detected and filled into &drm_connector.modes. 426 */ 427 int (*fill_modes)(struct drm_connector *connector, uint32_t max_width, uint32_t max_height); 428 429 /** 430 * @set_property: 431 * 432 * This is the legacy entry point to update a property attached to the 433 * connector. 434 * 435 * Drivers implementing atomic modeset should use 436 * drm_atomic_helper_connector_set_property() to implement this hook. 437 * 438 * This callback is optional if the driver does not support any legacy 439 * driver-private properties. 440 * 441 * RETURNS: 442 * 443 * 0 on success or a negative error code on failure. 444 */ 445 int (*set_property)(struct drm_connector *connector, struct drm_property *property, 446 uint64_t val); 447 448 /** 449 * @late_register: 450 * 451 * This optional hook can be used to register additional userspace 452 * interfaces attached to the connector, light backlight control, i2c, 453 * DP aux or similar interfaces. It is called late in the driver load 454 * sequence from drm_connector_register() when registering all the 455 * core drm connector interfaces. Everything added from this callback 456 * should be unregistered in the early_unregister callback. 457 * 458 * This is called while holding &drm_connector.mutex. 459 * 460 * Returns: 461 * 462 * 0 on success, or a negative error code on failure. 463 */ 464 int (*late_register)(struct drm_connector *connector); 465 466 /** 467 * @early_unregister: 468 * 469 * This optional hook should be used to unregister the additional 470 * userspace interfaces attached to the connector from 471 * late_register(). It is called from drm_connector_unregister(), 472 * early in the driver unload sequence to disable userspace access 473 * before data structures are torndown. 474 * 475 * This is called while holding &drm_connector.mutex. 476 */ 477 void (*early_unregister)(struct drm_connector *connector); 478 479 /** 480 * @destroy: 481 * 482 * Clean up connector resources. This is called at driver unload time 483 * through drm_mode_config_cleanup(). It can also be called at runtime 484 * when a connector is being hot-unplugged for drivers that support 485 * connector hotplugging (e.g. DisplayPort MST). 486 */ 487 void (*destroy)(struct drm_connector *connector); 488 489 /** 490 * @atomic_duplicate_state: 491 * 492 * Duplicate the current atomic state for this connector and return it. 493 * The core and helpers guarantee that any atomic state duplicated with 494 * this hook and still owned by the caller (i.e. not transferred to the 495 * driver by calling &drm_mode_config_funcs.atomic_commit) will be 496 * cleaned up by calling the @atomic_destroy_state hook in this 497 * structure. 498 * 499 * Atomic drivers which don't subclass &struct drm_connector_state should use 500 * drm_atomic_helper_connector_duplicate_state(). Drivers that subclass the 501 * state structure to extend it with driver-private state should use 502 * __drm_atomic_helper_connector_duplicate_state() to make sure shared state is 503 * duplicated in a consistent fashion across drivers. 504 * 505 * It is an error to call this hook before &drm_connector.state has been 506 * initialized correctly. 507 * 508 * NOTE: 509 * 510 * If the duplicate state references refcounted resources this hook must 511 * acquire a reference for each of them. The driver must release these 512 * references again in @atomic_destroy_state. 513 * 514 * RETURNS: 515 * 516 * Duplicated atomic state or NULL when the allocation failed. 517 */ 518 struct drm_connector_state *(*atomic_duplicate_state)(struct drm_connector *connector); 519 520 /** 521 * @atomic_destroy_state: 522 * 523 * Destroy a state duplicated with @atomic_duplicate_state and release 524 * or unreference all resources it references 525 */ 526 void (*atomic_destroy_state)(struct drm_connector *connector, 527 struct drm_connector_state *state); 528 529 /** 530 * @atomic_set_property: 531 * 532 * Decode a driver-private property value and store the decoded value 533 * into the passed-in state structure. Since the atomic core decodes all 534 * standardized properties (even for extensions beyond the core set of 535 * properties which might not be implemented by all drivers) this 536 * requires drivers to subclass the state structure. 537 * 538 * Such driver-private properties should really only be implemented for 539 * truly hardware/vendor specific state. Instead it is preferred to 540 * standardize atomic extension and decode the properties used to expose 541 * such an extension in the core. 542 * 543 * Do not call this function directly, use 544 * drm_atomic_connector_set_property() instead. 545 * 546 * This callback is optional if the driver does not support any 547 * driver-private atomic properties. 548 * 549 * NOTE: 550 * 551 * This function is called in the state assembly phase of atomic 552 * modesets, which can be aborted for any reason (including on 553 * userspace's request to just check whether a configuration would be 554 * possible). Drivers MUST NOT touch any persistent state (hardware or 555 * software) or data structures except the passed in @state parameter. 556 * 557 * Also since userspace controls in which order properties are set this 558 * function must not do any input validation (since the state update is 559 * incomplete and hence likely inconsistent). Instead any such input 560 * validation must be done in the various atomic_check callbacks. 561 * 562 * RETURNS: 563 * 564 * 0 if the property has been found, -EINVAL if the property isn't 565 * implemented by the driver (which shouldn't ever happen, the core only 566 * asks for properties attached to this connector). No other validation 567 * is allowed by the driver. The core already checks that the property 568 * value is within the range (integer, valid enum value, ...) the driver 569 * set when registering the property. 570 */ 571 int (*atomic_set_property)(struct drm_connector *connector, 572 struct drm_connector_state *state, 573 struct drm_property *property, 574 uint64_t val); 575 576 /** 577 * @atomic_get_property: 578 * 579 * Reads out the decoded driver-private property. This is used to 580 * implement the GETCONNECTOR IOCTL. 581 * 582 * Do not call this function directly, use 583 * drm_atomic_connector_get_property() instead. 584 * 585 * This callback is optional if the driver does not support any 586 * driver-private atomic properties. 587 * 588 * RETURNS: 589 * 590 * 0 on success, -EINVAL if the property isn't implemented by the 591 * driver (which shouldn't ever happen, the core only asks for 592 * properties attached to this connector). 593 */ 594 int (*atomic_get_property)(struct drm_connector *connector, 595 const struct drm_connector_state *state, 596 struct drm_property *property, 597 uint64_t *val); 598 599 /** 600 * @atomic_print_state: 601 * 602 * If driver subclasses &struct drm_connector_state, it should implement 603 * this optional hook for printing additional driver specific state. 604 * 605 * Do not call this directly, use drm_atomic_connector_print_state() 606 * instead. 607 */ 608 void (*atomic_print_state)(struct drm_printer *p, 609 const struct drm_connector_state *state); 610 }; 611 612 /* mode specified on the command line */ 613 struct drm_cmdline_mode { 614 bool specified; 615 bool refresh_specified; 616 bool bpp_specified; 617 int xres, yres; 618 int bpp; 619 int refresh; 620 bool rb; 621 bool interlace; 622 bool cvt; 623 bool margins; 624 enum drm_connector_force force; 625 }; 626 627 /** 628 * struct drm_connector - central DRM connector control structure 629 * @dev: parent DRM device 630 * @kdev: kernel device for sysfs attributes 631 * @attr: sysfs attributes 632 * @head: list management 633 * @base: base KMS object 634 * @name: human readable name, can be overwritten by the driver 635 * @connector_type: one of the DRM_MODE_CONNECTOR_<foo> types from drm_mode.h 636 * @connector_type_id: index into connector type enum 637 * @interlace_allowed: can this connector handle interlaced modes? 638 * @doublescan_allowed: can this connector handle doublescan? 639 * @stereo_allowed: can this connector handle stereo modes? 640 * @funcs: connector control functions 641 * @edid_blob_ptr: DRM property containing EDID if present 642 * @properties: property tracking for this connector 643 * @dpms: current dpms state 644 * @helper_private: mid-layer private data 645 * @cmdline_mode: mode line parsed from the kernel cmdline for this connector 646 * @force: a DRM_FORCE_<foo> state for forced mode sets 647 * @override_edid: has the EDID been overwritten through debugfs for testing? 648 * @encoder_ids: valid encoders for this connector 649 * @encoder: encoder driving this connector, if any 650 * @eld: EDID-like data, if present 651 * @latency_present: AV delay info from ELD, if found 652 * @video_latency: video latency info from ELD, if found 653 * @audio_latency: audio latency info from ELD, if found 654 * @null_edid_counter: track sinks that give us all zeros for the EDID 655 * @bad_edid_counter: track sinks that give us an EDID with invalid checksum 656 * @edid_corrupt: indicates whether the last read EDID was corrupt 657 * @debugfs_entry: debugfs directory for this connector 658 * @state: current atomic state for this connector 659 * @has_tile: is this connector connected to a tiled monitor 660 * @tile_group: tile group for the connected monitor 661 * @tile_is_single_monitor: whether the tile is one monitor housing 662 * @num_h_tile: number of horizontal tiles in the tile group 663 * @num_v_tile: number of vertical tiles in the tile group 664 * @tile_h_loc: horizontal location of this tile 665 * @tile_v_loc: vertical location of this tile 666 * @tile_h_size: horizontal size of this tile. 667 * @tile_v_size: vertical size of this tile. 668 * 669 * Each connector may be connected to one or more CRTCs, or may be clonable by 670 * another connector if they can share a CRTC. Each connector also has a specific 671 * position in the broader display (referred to as a 'screen' though it could 672 * span multiple monitors). 673 */ 674 struct drm_connector { 675 struct drm_device *dev; 676 struct device *kdev; 677 struct device_attribute *attr; 678 struct list_head head; 679 680 struct drm_mode_object base; 681 682 char *name; 683 684 /** 685 * @mutex: Lock for general connector state, but currently only protects 686 * @registered. Most of the connector state is still protected by 687 * &drm_mode_config.mutex. 688 */ 689 struct mutex mutex; 690 691 /** 692 * @index: Compacted connector index, which matches the position inside 693 * the mode_config.list for drivers not supporting hot-add/removing. Can 694 * be used as an array index. It is invariant over the lifetime of the 695 * connector. 696 */ 697 unsigned index; 698 699 int connector_type; 700 int connector_type_id; 701 bool interlace_allowed; 702 bool doublescan_allowed; 703 bool stereo_allowed; 704 /** 705 * @registered: Is this connector exposed (registered) with userspace? 706 * Protected by @mutex. 707 */ 708 bool registered; 709 710 /** 711 * @modes: 712 * Modes available on this connector (from fill_modes() + user). 713 * Protected by &drm_mode_config.mutex. 714 */ 715 struct list_head modes; 716 717 /** 718 * @status: 719 * One of the drm_connector_status enums (connected, not, or unknown). 720 * Protected by &drm_mode_config.mutex. 721 */ 722 enum drm_connector_status status; 723 724 /** 725 * @probed_modes: 726 * These are modes added by probing with DDC or the BIOS, before 727 * filtering is applied. Used by the probe helpers. Protected by 728 * &drm_mode_config.mutex. 729 */ 730 struct list_head probed_modes; 731 732 /** 733 * @display_info: Display information is filled from EDID information 734 * when a display is detected. For non hot-pluggable displays such as 735 * flat panels in embedded systems, the driver should initialize the 736 * &drm_display_info.width_mm and &drm_display_info.height_mm fields 737 * with the physical size of the display. 738 * 739 * Protected by &drm_mode_config.mutex. 740 */ 741 struct drm_display_info display_info; 742 const struct drm_connector_funcs *funcs; 743 744 struct drm_property_blob *edid_blob_ptr; 745 struct drm_object_properties properties; 746 747 /** 748 * @path_blob_ptr: 749 * 750 * DRM blob property data for the DP MST path property. 751 */ 752 struct drm_property_blob *path_blob_ptr; 753 754 /** 755 * @tile_blob_ptr: 756 * 757 * DRM blob property data for the tile property (used mostly by DP MST). 758 * This is meant for screens which are driven through separate display 759 * pipelines represented by &drm_crtc, which might not be running with 760 * genlocked clocks. For tiled panels which are genlocked, like 761 * dual-link LVDS or dual-link DSI, the driver should try to not expose 762 * the tiling and virtualize both &drm_crtc and &drm_plane if needed. 763 */ 764 struct drm_property_blob *tile_blob_ptr; 765 766 /* should we poll this connector for connects and disconnects */ 767 /* hot plug detectable */ 768 #define DRM_CONNECTOR_POLL_HPD (1 << 0) 769 /* poll for connections */ 770 #define DRM_CONNECTOR_POLL_CONNECT (1 << 1) 771 /* can cleanly poll for disconnections without flickering the screen */ 772 /* DACs should rarely do this without a lot of testing */ 773 #define DRM_CONNECTOR_POLL_DISCONNECT (1 << 2) 774 775 /** 776 * @polled: 777 * 778 * Connector polling mode, a combination of 779 * 780 * DRM_CONNECTOR_POLL_HPD 781 * The connector generates hotplug events and doesn't need to be 782 * periodically polled. The CONNECT and DISCONNECT flags must not 783 * be set together with the HPD flag. 784 * 785 * DRM_CONNECTOR_POLL_CONNECT 786 * Periodically poll the connector for connection. 787 * 788 * DRM_CONNECTOR_POLL_DISCONNECT 789 * Periodically poll the connector for disconnection. 790 * 791 * Set to 0 for connectors that don't support connection status 792 * discovery. 793 */ 794 uint8_t polled; 795 796 /* requested DPMS state */ 797 int dpms; 798 799 const struct drm_connector_helper_funcs *helper_private; 800 801 /* forced on connector */ 802 struct drm_cmdline_mode cmdline_mode; 803 enum drm_connector_force force; 804 bool override_edid; 805 806 #define DRM_CONNECTOR_MAX_ENCODER 3 807 uint32_t encoder_ids[DRM_CONNECTOR_MAX_ENCODER]; 808 struct drm_encoder *encoder; /* currently active encoder */ 809 810 #define MAX_ELD_BYTES 128 811 /* EDID bits */ 812 uint8_t eld[MAX_ELD_BYTES]; 813 bool latency_present[2]; 814 int video_latency[2]; /* [0]: progressive, [1]: interlaced */ 815 int audio_latency[2]; 816 int null_edid_counter; /* needed to workaround some HW bugs where we get all 0s */ 817 unsigned bad_edid_counter; 818 819 /* Flag for raw EDID header corruption - used in Displayport 820 * compliance testing - * Displayport Link CTS Core 1.2 rev1.1 4.2.2.6 821 */ 822 bool edid_corrupt; 823 824 struct dentry *debugfs_entry; 825 826 struct drm_connector_state *state; 827 828 /* DisplayID bits */ 829 bool has_tile; 830 struct drm_tile_group *tile_group; 831 bool tile_is_single_monitor; 832 833 uint8_t num_h_tile, num_v_tile; 834 uint8_t tile_h_loc, tile_v_loc; 835 uint16_t tile_h_size, tile_v_size; 836 }; 837 838 #define obj_to_connector(x) container_of(x, struct drm_connector, base) 839 840 int drm_connector_init(struct drm_device *dev, 841 struct drm_connector *connector, 842 const struct drm_connector_funcs *funcs, 843 int connector_type); 844 int drm_connector_register(struct drm_connector *connector); 845 void drm_connector_unregister(struct drm_connector *connector); 846 int drm_mode_connector_attach_encoder(struct drm_connector *connector, 847 struct drm_encoder *encoder); 848 849 void drm_connector_cleanup(struct drm_connector *connector); 850 static inline unsigned drm_connector_index(struct drm_connector *connector) 851 { 852 return connector->index; 853 } 854 855 /** 856 * drm_connector_lookup - lookup connector object 857 * @dev: DRM device 858 * @id: connector object id 859 * 860 * This function looks up the connector object specified by id 861 * add takes a reference to it. 862 */ 863 static inline struct drm_connector *drm_connector_lookup(struct drm_device *dev, 864 uint32_t id) 865 { 866 struct drm_mode_object *mo; 867 mo = drm_mode_object_find(dev, id, DRM_MODE_OBJECT_CONNECTOR); 868 return mo ? obj_to_connector(mo) : NULL; 869 } 870 871 /** 872 * drm_connector_get - acquire a connector reference 873 * @connector: DRM connector 874 * 875 * This function increments the connector's refcount. 876 */ 877 static inline void drm_connector_get(struct drm_connector *connector) 878 { 879 drm_mode_object_get(&connector->base); 880 } 881 882 /** 883 * drm_connector_put - release a connector reference 884 * @connector: DRM connector 885 * 886 * This function decrements the connector's reference count and frees the 887 * object if the reference count drops to zero. 888 */ 889 static inline void drm_connector_put(struct drm_connector *connector) 890 { 891 drm_mode_object_put(&connector->base); 892 } 893 894 /** 895 * drm_connector_reference - acquire a connector reference 896 * @connector: DRM connector 897 * 898 * This is a compatibility alias for drm_connector_get() and should not be 899 * used by new code. 900 */ 901 static inline void drm_connector_reference(struct drm_connector *connector) 902 { 903 drm_connector_get(connector); 904 } 905 906 /** 907 * drm_connector_unreference - release a connector reference 908 * @connector: DRM connector 909 * 910 * This is a compatibility alias for drm_connector_put() and should not be 911 * used by new code. 912 */ 913 static inline void drm_connector_unreference(struct drm_connector *connector) 914 { 915 drm_connector_put(connector); 916 } 917 918 const char *drm_get_connector_status_name(enum drm_connector_status status); 919 const char *drm_get_subpixel_order_name(enum subpixel_order order); 920 const char *drm_get_dpms_name(int val); 921 const char *drm_get_dvi_i_subconnector_name(int val); 922 const char *drm_get_dvi_i_select_name(int val); 923 const char *drm_get_tv_subconnector_name(int val); 924 const char *drm_get_tv_select_name(int val); 925 926 int drm_mode_create_dvi_i_properties(struct drm_device *dev); 927 int drm_mode_create_tv_properties(struct drm_device *dev, 928 unsigned int num_modes, 929 const char * const modes[]); 930 int drm_mode_create_scaling_mode_property(struct drm_device *dev); 931 int drm_mode_create_aspect_ratio_property(struct drm_device *dev); 932 int drm_mode_create_suggested_offset_properties(struct drm_device *dev); 933 934 int drm_mode_connector_set_path_property(struct drm_connector *connector, 935 const char *path); 936 int drm_mode_connector_set_tile_property(struct drm_connector *connector); 937 int drm_mode_connector_update_edid_property(struct drm_connector *connector, 938 const struct edid *edid); 939 void drm_mode_connector_set_link_status_property(struct drm_connector *connector, 940 uint64_t link_status); 941 942 /** 943 * struct drm_tile_group - Tile group metadata 944 * @refcount: reference count 945 * @dev: DRM device 946 * @id: tile group id exposed to userspace 947 * @group_data: Sink-private data identifying this group 948 * 949 * @group_data corresponds to displayid vend/prod/serial for external screens 950 * with an EDID. 951 */ 952 struct drm_tile_group { 953 struct kref refcount; 954 struct drm_device *dev; 955 int id; 956 u8 group_data[8]; 957 }; 958 959 struct drm_tile_group *drm_mode_create_tile_group(struct drm_device *dev, 960 char topology[8]); 961 struct drm_tile_group *drm_mode_get_tile_group(struct drm_device *dev, 962 char topology[8]); 963 void drm_mode_put_tile_group(struct drm_device *dev, 964 struct drm_tile_group *tg); 965 966 /** 967 * drm_for_each_connector - iterate over all connectors 968 * @connector: the loop cursor 969 * @dev: the DRM device 970 * 971 * Iterate over all connectors of @dev. 972 * 973 * WARNING: 974 * 975 * This iterator is not safe against hotadd/removal of connectors and is 976 * deprecated. Use drm_for_each_connector_iter() instead. 977 */ 978 #define drm_for_each_connector(connector, dev) \ 979 list_for_each_entry(connector, &(dev)->mode_config.connector_list, head) 980 981 /** 982 * struct drm_connector_list_iter - connector_list iterator 983 * 984 * This iterator tracks state needed to be able to walk the connector_list 985 * within struct drm_mode_config. Only use together with 986 * drm_connector_list_iter_begin(), drm_connector_list_iter_end() and 987 * drm_connector_list_iter_next() respectively the convenience macro 988 * drm_for_each_connector_iter(). 989 */ 990 struct drm_connector_list_iter { 991 /* private: */ 992 struct drm_device *dev; 993 struct drm_connector *conn; 994 }; 995 996 void drm_connector_list_iter_begin(struct drm_device *dev, 997 struct drm_connector_list_iter *iter); 998 struct drm_connector * 999 drm_connector_list_iter_next(struct drm_connector_list_iter *iter); 1000 void drm_connector_list_iter_end(struct drm_connector_list_iter *iter); 1001 1002 /** 1003 * drm_for_each_connector_iter - connector_list iterator macro 1004 * @connector: &struct drm_connector pointer used as cursor 1005 * @iter: &struct drm_connector_list_iter 1006 * 1007 * Note that @connector is only valid within the list body, if you want to use 1008 * @connector after calling drm_connector_list_iter_end() then you need to grab 1009 * your own reference first using drm_connector_begin(). 1010 */ 1011 #define drm_for_each_connector_iter(connector, iter) \ 1012 while ((connector = drm_connector_list_iter_next(iter))) 1013 1014 #endif 1015