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/llist.h> 28 #include <linux/ctype.h> 29 #include <linux/hdmi.h> 30 #include <drm/drm_mode_object.h> 31 #include <drm/drm_util.h> 32 33 #include <uapi/drm/drm_mode.h> 34 35 struct drm_connector_helper_funcs; 36 struct drm_modeset_acquire_ctx; 37 struct drm_device; 38 struct drm_crtc; 39 struct drm_encoder; 40 struct drm_property; 41 struct drm_property_blob; 42 struct drm_printer; 43 struct edid; 44 struct i2c_adapter; 45 46 enum drm_connector_force { 47 DRM_FORCE_UNSPECIFIED, 48 DRM_FORCE_OFF, 49 DRM_FORCE_ON, /* force on analog part normally */ 50 DRM_FORCE_ON_DIGITAL, /* for DVI-I use digital connector */ 51 }; 52 53 /** 54 * enum drm_connector_status - status for a &drm_connector 55 * 56 * This enum is used to track the connector status. There are no separate 57 * #defines for the uapi! 58 */ 59 enum drm_connector_status { 60 /** 61 * @connector_status_connected: The connector is definitely connected to 62 * a sink device, and can be enabled. 63 */ 64 connector_status_connected = 1, 65 /** 66 * @connector_status_disconnected: The connector isn't connected to a 67 * sink device which can be autodetect. For digital outputs like DP or 68 * HDMI (which can be realiable probed) this means there's really 69 * nothing there. It is driver-dependent whether a connector with this 70 * status can be lit up or not. 71 */ 72 connector_status_disconnected = 2, 73 /** 74 * @connector_status_unknown: The connector's status could not be 75 * reliably detected. This happens when probing would either cause 76 * flicker (like load-detection when the connector is in use), or when a 77 * hardware resource isn't available (like when load-detection needs a 78 * free CRTC). It should be possible to light up the connector with one 79 * of the listed fallback modes. For default configuration userspace 80 * should only try to light up connectors with unknown status when 81 * there's not connector with @connector_status_connected. 82 */ 83 connector_status_unknown = 3, 84 }; 85 86 /** 87 * enum drm_connector_registration_status - userspace registration status for 88 * a &drm_connector 89 * 90 * This enum is used to track the status of initializing a connector and 91 * registering it with userspace, so that DRM can prevent bogus modesets on 92 * connectors that no longer exist. 93 */ 94 enum drm_connector_registration_state { 95 /** 96 * @DRM_CONNECTOR_INITIALIZING: The connector has just been created, 97 * but has yet to be exposed to userspace. There should be no 98 * additional restrictions to how the state of this connector may be 99 * modified. 100 */ 101 DRM_CONNECTOR_INITIALIZING = 0, 102 103 /** 104 * @DRM_CONNECTOR_REGISTERED: The connector has been fully initialized 105 * and registered with sysfs, as such it has been exposed to 106 * userspace. There should be no additional restrictions to how the 107 * state of this connector may be modified. 108 */ 109 DRM_CONNECTOR_REGISTERED = 1, 110 111 /** 112 * @DRM_CONNECTOR_UNREGISTERED: The connector has either been exposed 113 * to userspace and has since been unregistered and removed from 114 * userspace, or the connector was unregistered before it had a chance 115 * to be exposed to userspace (e.g. still in the 116 * @DRM_CONNECTOR_INITIALIZING state). When a connector is 117 * unregistered, there are additional restrictions to how its state 118 * may be modified: 119 * 120 * - An unregistered connector may only have its DPMS changed from 121 * On->Off. Once DPMS is changed to Off, it may not be switched back 122 * to On. 123 * - Modesets are not allowed on unregistered connectors, unless they 124 * would result in disabling its assigned CRTCs. This means 125 * disabling a CRTC on an unregistered connector is OK, but enabling 126 * one is not. 127 * - Removing a CRTC from an unregistered connector is OK, but new 128 * CRTCs may never be assigned to an unregistered connector. 129 */ 130 DRM_CONNECTOR_UNREGISTERED = 2, 131 }; 132 133 enum subpixel_order { 134 SubPixelUnknown = 0, 135 SubPixelHorizontalRGB, 136 SubPixelHorizontalBGR, 137 SubPixelVerticalRGB, 138 SubPixelVerticalBGR, 139 SubPixelNone, 140 141 }; 142 143 /** 144 * struct drm_scrambling: sink's scrambling support. 145 */ 146 struct drm_scrambling { 147 /** 148 * @supported: scrambling supported for rates > 340 Mhz. 149 */ 150 bool supported; 151 /** 152 * @low_rates: scrambling supported for rates <= 340 Mhz. 153 */ 154 bool low_rates; 155 }; 156 157 /* 158 * struct drm_scdc - Information about scdc capabilities of a HDMI 2.0 sink 159 * 160 * Provides SCDC register support and capabilities related information on a 161 * HDMI 2.0 sink. In case of a HDMI 1.4 sink, all parameter must be 0. 162 */ 163 struct drm_scdc { 164 /** 165 * @supported: status control & data channel present. 166 */ 167 bool supported; 168 /** 169 * @read_request: sink is capable of generating scdc read request. 170 */ 171 bool read_request; 172 /** 173 * @scrambling: sink's scrambling capabilities 174 */ 175 struct drm_scrambling scrambling; 176 }; 177 178 179 /** 180 * struct drm_hdmi_info - runtime information about the connected HDMI sink 181 * 182 * Describes if a given display supports advanced HDMI 2.0 features. 183 * This information is available in CEA-861-F extension blocks (like HF-VSDB). 184 */ 185 struct drm_hdmi_info { 186 /** @scdc: sink's scdc support and capabilities */ 187 struct drm_scdc scdc; 188 189 /** 190 * @y420_vdb_modes: bitmap of modes which can support ycbcr420 191 * output only (not normal RGB/YCBCR444/422 outputs). The max VIC 192 * defined by the CEA-861-G spec is 219, so the size is 256 bits to map 193 * up to 256 VICs. 194 */ 195 unsigned long y420_vdb_modes[BITS_TO_LONGS(256)]; 196 197 /** 198 * @y420_cmdb_modes: bitmap of modes which can support ycbcr420 199 * output also, along with normal HDMI outputs. The max VIC defined by 200 * the CEA-861-G spec is 219, so the size is 256 bits to map up to 256 201 * VICs. 202 */ 203 unsigned long y420_cmdb_modes[BITS_TO_LONGS(256)]; 204 205 /** @y420_cmdb_map: bitmap of SVD index, to extraxt vcb modes */ 206 u64 y420_cmdb_map; 207 208 /** @y420_dc_modes: bitmap of deep color support index */ 209 u8 y420_dc_modes; 210 }; 211 212 /** 213 * enum drm_link_status - connector's link_status property value 214 * 215 * This enum is used as the connector's link status property value. 216 * It is set to the values defined in uapi. 217 * 218 * @DRM_LINK_STATUS_GOOD: DP Link is Good as a result of successful 219 * link training 220 * @DRM_LINK_STATUS_BAD: DP Link is BAD as a result of link training 221 * failure 222 */ 223 enum drm_link_status { 224 DRM_LINK_STATUS_GOOD = DRM_MODE_LINK_STATUS_GOOD, 225 DRM_LINK_STATUS_BAD = DRM_MODE_LINK_STATUS_BAD, 226 }; 227 228 /** 229 * enum drm_panel_orientation - panel_orientation info for &drm_display_info 230 * 231 * This enum is used to track the (LCD) panel orientation. There are no 232 * separate #defines for the uapi! 233 * 234 * @DRM_MODE_PANEL_ORIENTATION_UNKNOWN: The drm driver has not provided any 235 * panel orientation information (normal 236 * for non panels) in this case the "panel 237 * orientation" connector prop will not be 238 * attached. 239 * @DRM_MODE_PANEL_ORIENTATION_NORMAL: The top side of the panel matches the 240 * top side of the device's casing. 241 * @DRM_MODE_PANEL_ORIENTATION_BOTTOM_UP: The top side of the panel matches the 242 * bottom side of the device's casing, iow 243 * the panel is mounted upside-down. 244 * @DRM_MODE_PANEL_ORIENTATION_LEFT_UP: The left side of the panel matches the 245 * top side of the device's casing. 246 * @DRM_MODE_PANEL_ORIENTATION_RIGHT_UP: The right side of the panel matches the 247 * top side of the device's casing. 248 */ 249 enum drm_panel_orientation { 250 DRM_MODE_PANEL_ORIENTATION_UNKNOWN = -1, 251 DRM_MODE_PANEL_ORIENTATION_NORMAL = 0, 252 DRM_MODE_PANEL_ORIENTATION_BOTTOM_UP, 253 DRM_MODE_PANEL_ORIENTATION_LEFT_UP, 254 DRM_MODE_PANEL_ORIENTATION_RIGHT_UP, 255 }; 256 257 /** 258 * struct drm_monitor_range_info - Panel's Monitor range in EDID for 259 * &drm_display_info 260 * 261 * This struct is used to store a frequency range supported by panel 262 * as parsed from EDID's detailed monitor range descriptor block. 263 * 264 * @min_vfreq: This is the min supported refresh rate in Hz from 265 * EDID's detailed monitor range. 266 * @max_vfreq: This is the max supported refresh rate in Hz from 267 * EDID's detailed monitor range 268 */ 269 struct drm_monitor_range_info { 270 u8 min_vfreq; 271 u8 max_vfreq; 272 }; 273 274 /* 275 * This is a consolidated colorimetry list supported by HDMI and 276 * DP protocol standard. The respective connectors will register 277 * a property with the subset of this list (supported by that 278 * respective protocol). Userspace will set the colorspace through 279 * a colorspace property which will be created and exposed to 280 * userspace. 281 */ 282 283 /* For Default case, driver will set the colorspace */ 284 #define DRM_MODE_COLORIMETRY_DEFAULT 0 285 /* CEA 861 Normal Colorimetry options */ 286 #define DRM_MODE_COLORIMETRY_NO_DATA 0 287 #define DRM_MODE_COLORIMETRY_SMPTE_170M_YCC 1 288 #define DRM_MODE_COLORIMETRY_BT709_YCC 2 289 /* CEA 861 Extended Colorimetry Options */ 290 #define DRM_MODE_COLORIMETRY_XVYCC_601 3 291 #define DRM_MODE_COLORIMETRY_XVYCC_709 4 292 #define DRM_MODE_COLORIMETRY_SYCC_601 5 293 #define DRM_MODE_COLORIMETRY_OPYCC_601 6 294 #define DRM_MODE_COLORIMETRY_OPRGB 7 295 #define DRM_MODE_COLORIMETRY_BT2020_CYCC 8 296 #define DRM_MODE_COLORIMETRY_BT2020_RGB 9 297 #define DRM_MODE_COLORIMETRY_BT2020_YCC 10 298 /* Additional Colorimetry extension added as part of CTA 861.G */ 299 #define DRM_MODE_COLORIMETRY_DCI_P3_RGB_D65 11 300 #define DRM_MODE_COLORIMETRY_DCI_P3_RGB_THEATER 12 301 /* Additional Colorimetry Options added for DP 1.4a VSC Colorimetry Format */ 302 #define DRM_MODE_COLORIMETRY_RGB_WIDE_FIXED 13 303 #define DRM_MODE_COLORIMETRY_RGB_WIDE_FLOAT 14 304 #define DRM_MODE_COLORIMETRY_BT601_YCC 15 305 306 /** 307 * enum drm_bus_flags - bus_flags info for &drm_display_info 308 * 309 * This enum defines signal polarities and clock edge information for signals on 310 * a bus as bitmask flags. 311 * 312 * The clock edge information is conveyed by two sets of symbols, 313 * DRM_BUS_FLAGS_*_DRIVE_\* and DRM_BUS_FLAGS_*_SAMPLE_\*. When this enum is 314 * used to describe a bus from the point of view of the transmitter, the 315 * \*_DRIVE_\* flags should be used. When used from the point of view of the 316 * receiver, the \*_SAMPLE_\* flags should be used. The \*_DRIVE_\* and 317 * \*_SAMPLE_\* flags alias each other, with the \*_SAMPLE_POSEDGE and 318 * \*_SAMPLE_NEGEDGE flags being equal to \*_DRIVE_NEGEDGE and \*_DRIVE_POSEDGE 319 * respectively. This simplifies code as signals are usually sampled on the 320 * opposite edge of the driving edge. Transmitters and receivers may however 321 * need to take other signal timings into account to convert between driving 322 * and sample edges. 323 */ 324 enum drm_bus_flags { 325 /** 326 * @DRM_BUS_FLAG_DE_LOW: 327 * 328 * The Data Enable signal is active low 329 */ 330 DRM_BUS_FLAG_DE_LOW = BIT(0), 331 332 /** 333 * @DRM_BUS_FLAG_DE_HIGH: 334 * 335 * The Data Enable signal is active high 336 */ 337 DRM_BUS_FLAG_DE_HIGH = BIT(1), 338 339 /** 340 * @DRM_BUS_FLAG_PIXDATA_DRIVE_POSEDGE: 341 * 342 * Data is driven on the rising edge of the pixel clock 343 */ 344 DRM_BUS_FLAG_PIXDATA_DRIVE_POSEDGE = BIT(2), 345 346 /** 347 * @DRM_BUS_FLAG_PIXDATA_DRIVE_NEGEDGE: 348 * 349 * Data is driven on the falling edge of the pixel clock 350 */ 351 DRM_BUS_FLAG_PIXDATA_DRIVE_NEGEDGE = BIT(3), 352 353 /** 354 * @DRM_BUS_FLAG_PIXDATA_SAMPLE_POSEDGE: 355 * 356 * Data is sampled on the rising edge of the pixel clock 357 */ 358 DRM_BUS_FLAG_PIXDATA_SAMPLE_POSEDGE = DRM_BUS_FLAG_PIXDATA_DRIVE_NEGEDGE, 359 360 /** 361 * @DRM_BUS_FLAG_PIXDATA_SAMPLE_NEGEDGE: 362 * 363 * Data is sampled on the falling edge of the pixel clock 364 */ 365 DRM_BUS_FLAG_PIXDATA_SAMPLE_NEGEDGE = DRM_BUS_FLAG_PIXDATA_DRIVE_POSEDGE, 366 367 /** 368 * @DRM_BUS_FLAG_DATA_MSB_TO_LSB: 369 * 370 * Data is transmitted MSB to LSB on the bus 371 */ 372 DRM_BUS_FLAG_DATA_MSB_TO_LSB = BIT(4), 373 374 /** 375 * @DRM_BUS_FLAG_DATA_LSB_TO_MSB: 376 * 377 * Data is transmitted LSB to MSB on the bus 378 */ 379 DRM_BUS_FLAG_DATA_LSB_TO_MSB = BIT(5), 380 381 /** 382 * @DRM_BUS_FLAG_SYNC_DRIVE_POSEDGE: 383 * 384 * Sync signals are driven on the rising edge of the pixel clock 385 */ 386 DRM_BUS_FLAG_SYNC_DRIVE_POSEDGE = BIT(6), 387 388 /** 389 * @DRM_BUS_FLAG_SYNC_DRIVE_NEGEDGE: 390 * 391 * Sync signals are driven on the falling edge of the pixel clock 392 */ 393 DRM_BUS_FLAG_SYNC_DRIVE_NEGEDGE = BIT(7), 394 395 /** 396 * @DRM_BUS_FLAG_SYNC_SAMPLE_POSEDGE: 397 * 398 * Sync signals are sampled on the rising edge of the pixel clock 399 */ 400 DRM_BUS_FLAG_SYNC_SAMPLE_POSEDGE = DRM_BUS_FLAG_SYNC_DRIVE_NEGEDGE, 401 402 /** 403 * @DRM_BUS_FLAG_SYNC_SAMPLE_NEGEDGE: 404 * 405 * Sync signals are sampled on the falling edge of the pixel clock 406 */ 407 DRM_BUS_FLAG_SYNC_SAMPLE_NEGEDGE = DRM_BUS_FLAG_SYNC_DRIVE_POSEDGE, 408 409 /** 410 * @DRM_BUS_FLAG_SHARP_SIGNALS: 411 * 412 * Set if the Sharp-specific signals (SPL, CLS, PS, REV) must be used 413 */ 414 DRM_BUS_FLAG_SHARP_SIGNALS = BIT(8), 415 }; 416 417 /** 418 * struct drm_display_info - runtime data about the connected sink 419 * 420 * Describes a given display (e.g. CRT or flat panel) and its limitations. For 421 * fixed display sinks like built-in panels there's not much difference between 422 * this and &struct drm_connector. But for sinks with a real cable this 423 * structure is meant to describe all the things at the other end of the cable. 424 * 425 * For sinks which provide an EDID this can be filled out by calling 426 * drm_add_edid_modes(). 427 */ 428 struct drm_display_info { 429 /** 430 * @width_mm: Physical width in mm. 431 */ 432 unsigned int width_mm; 433 434 /** 435 * @height_mm: Physical height in mm. 436 */ 437 unsigned int height_mm; 438 439 /** 440 * @bpc: Maximum bits per color channel. Used by HDMI and DP outputs. 441 */ 442 unsigned int bpc; 443 444 /** 445 * @subpixel_order: Subpixel order of LCD panels. 446 */ 447 enum subpixel_order subpixel_order; 448 449 #define DRM_COLOR_FORMAT_RGB444 (1<<0) 450 #define DRM_COLOR_FORMAT_YCRCB444 (1<<1) 451 #define DRM_COLOR_FORMAT_YCRCB422 (1<<2) 452 #define DRM_COLOR_FORMAT_YCRCB420 (1<<3) 453 454 /** 455 * @panel_orientation: Read only connector property for built-in panels, 456 * indicating the orientation of the panel vs the device's casing. 457 * drm_connector_init() sets this to DRM_MODE_PANEL_ORIENTATION_UNKNOWN. 458 * When not UNKNOWN this gets used by the drm_fb_helpers to rotate the 459 * fb to compensate and gets exported as prop to userspace. 460 */ 461 int panel_orientation; 462 463 /** 464 * @color_formats: HDMI Color formats, selects between RGB and YCrCb 465 * modes. Used DRM_COLOR_FORMAT\_ defines, which are _not_ the same ones 466 * as used to describe the pixel format in framebuffers, and also don't 467 * match the formats in @bus_formats which are shared with v4l. 468 */ 469 u32 color_formats; 470 471 /** 472 * @bus_formats: Pixel data format on the wire, somewhat redundant with 473 * @color_formats. Array of size @num_bus_formats encoded using 474 * MEDIA_BUS_FMT\_ defines shared with v4l and media drivers. 475 */ 476 const u32 *bus_formats; 477 /** 478 * @num_bus_formats: Size of @bus_formats array. 479 */ 480 unsigned int num_bus_formats; 481 482 /** 483 * @bus_flags: Additional information (like pixel signal polarity) for 484 * the pixel data on the bus, using &enum drm_bus_flags values 485 * DRM_BUS_FLAGS\_. 486 */ 487 u32 bus_flags; 488 489 /** 490 * @max_tmds_clock: Maximum TMDS clock rate supported by the 491 * sink in kHz. 0 means undefined. 492 */ 493 int max_tmds_clock; 494 495 /** 496 * @dvi_dual: Dual-link DVI sink? 497 */ 498 bool dvi_dual; 499 500 /** 501 * @is_hdmi: True if the sink is an HDMI device. 502 * 503 * This field shall be used instead of calling 504 * drm_detect_hdmi_monitor() when possible. 505 */ 506 bool is_hdmi; 507 508 /** 509 * @has_hdmi_infoframe: Does the sink support the HDMI infoframe? 510 */ 511 bool has_hdmi_infoframe; 512 513 /** 514 * @rgb_quant_range_selectable: Does the sink support selecting 515 * the RGB quantization range? 516 */ 517 bool rgb_quant_range_selectable; 518 519 /** 520 * @edid_hdmi_dc_modes: Mask of supported hdmi deep color modes. Even 521 * more stuff redundant with @bus_formats. 522 */ 523 u8 edid_hdmi_dc_modes; 524 525 /** 526 * @cea_rev: CEA revision of the HDMI sink. 527 */ 528 u8 cea_rev; 529 530 /** 531 * @hdmi: advance features of a HDMI sink. 532 */ 533 struct drm_hdmi_info hdmi; 534 535 /** 536 * @non_desktop: Non desktop display (HMD). 537 */ 538 bool non_desktop; 539 540 /** 541 * @monitor_range: Frequency range supported by monitor range descriptor 542 */ 543 struct drm_monitor_range_info monitor_range; 544 }; 545 546 int drm_display_info_set_bus_formats(struct drm_display_info *info, 547 const u32 *formats, 548 unsigned int num_formats); 549 550 /** 551 * struct drm_connector_tv_margins - TV connector related margins 552 * 553 * Describes the margins in pixels to put around the image on TV 554 * connectors to deal with overscan. 555 */ 556 struct drm_connector_tv_margins { 557 /** 558 * @bottom: Bottom margin in pixels. 559 */ 560 unsigned int bottom; 561 562 /** 563 * @left: Left margin in pixels. 564 */ 565 unsigned int left; 566 567 /** 568 * @right: Right margin in pixels. 569 */ 570 unsigned int right; 571 572 /** 573 * @top: Top margin in pixels. 574 */ 575 unsigned int top; 576 }; 577 578 /** 579 * struct drm_tv_connector_state - TV connector related states 580 * @subconnector: selected subconnector 581 * @margins: TV margins 582 * @mode: TV mode 583 * @brightness: brightness in percent 584 * @contrast: contrast in percent 585 * @flicker_reduction: flicker reduction in percent 586 * @overscan: overscan in percent 587 * @saturation: saturation in percent 588 * @hue: hue in percent 589 */ 590 struct drm_tv_connector_state { 591 enum drm_mode_subconnector subconnector; 592 struct drm_connector_tv_margins margins; 593 unsigned int mode; 594 unsigned int brightness; 595 unsigned int contrast; 596 unsigned int flicker_reduction; 597 unsigned int overscan; 598 unsigned int saturation; 599 unsigned int hue; 600 }; 601 602 /** 603 * struct drm_connector_state - mutable connector state 604 */ 605 struct drm_connector_state { 606 /** @connector: backpointer to the connector */ 607 struct drm_connector *connector; 608 609 /** 610 * @crtc: CRTC to connect connector to, NULL if disabled. 611 * 612 * Do not change this directly, use drm_atomic_set_crtc_for_connector() 613 * instead. 614 */ 615 struct drm_crtc *crtc; 616 617 /** 618 * @best_encoder: 619 * 620 * Used by the atomic helpers to select the encoder, through the 621 * &drm_connector_helper_funcs.atomic_best_encoder or 622 * &drm_connector_helper_funcs.best_encoder callbacks. 623 * 624 * This is also used in the atomic helpers to map encoders to their 625 * current and previous connectors, see 626 * drm_atomic_get_old_connector_for_encoder() and 627 * drm_atomic_get_new_connector_for_encoder(). 628 * 629 * NOTE: Atomic drivers must fill this out (either themselves or through 630 * helpers), for otherwise the GETCONNECTOR and GETENCODER IOCTLs will 631 * not return correct data to userspace. 632 */ 633 struct drm_encoder *best_encoder; 634 635 /** 636 * @link_status: Connector link_status to keep track of whether link is 637 * GOOD or BAD to notify userspace if retraining is necessary. 638 */ 639 enum drm_link_status link_status; 640 641 /** @state: backpointer to global drm_atomic_state */ 642 struct drm_atomic_state *state; 643 644 /** 645 * @commit: Tracks the pending commit to prevent use-after-free conditions. 646 * 647 * Is only set when @crtc is NULL. 648 */ 649 struct drm_crtc_commit *commit; 650 651 /** @tv: TV connector state */ 652 struct drm_tv_connector_state tv; 653 654 /** 655 * @self_refresh_aware: 656 * 657 * This tracks whether a connector is aware of the self refresh state. 658 * It should be set to true for those connector implementations which 659 * understand the self refresh state. This is needed since the crtc 660 * registers the self refresh helpers and it doesn't know if the 661 * connectors downstream have implemented self refresh entry/exit. 662 * 663 * Drivers should set this to true in atomic_check if they know how to 664 * handle self_refresh requests. 665 */ 666 bool self_refresh_aware; 667 668 /** 669 * @picture_aspect_ratio: Connector property to control the 670 * HDMI infoframe aspect ratio setting. 671 * 672 * The %DRM_MODE_PICTURE_ASPECT_\* values much match the 673 * values for &enum hdmi_picture_aspect 674 */ 675 enum hdmi_picture_aspect picture_aspect_ratio; 676 677 /** 678 * @content_type: Connector property to control the 679 * HDMI infoframe content type setting. 680 * The %DRM_MODE_CONTENT_TYPE_\* values much 681 * match the values. 682 */ 683 unsigned int content_type; 684 685 /** 686 * @hdcp_content_type: Connector property to pass the type of 687 * protected content. This is most commonly used for HDCP. 688 */ 689 unsigned int hdcp_content_type; 690 691 /** 692 * @scaling_mode: Connector property to control the 693 * upscaling, mostly used for built-in panels. 694 */ 695 unsigned int scaling_mode; 696 697 /** 698 * @content_protection: Connector property to request content 699 * protection. This is most commonly used for HDCP. 700 */ 701 unsigned int content_protection; 702 703 /** 704 * @colorspace: State variable for Connector property to request 705 * colorspace change on Sink. This is most commonly used to switch 706 * to wider color gamuts like BT2020. 707 */ 708 u32 colorspace; 709 710 /** 711 * @writeback_job: Writeback job for writeback connectors 712 * 713 * Holds the framebuffer and out-fence for a writeback connector. As 714 * the writeback completion may be asynchronous to the normal commit 715 * cycle, the writeback job lifetime is managed separately from the 716 * normal atomic state by this object. 717 * 718 * See also: drm_writeback_queue_job() and 719 * drm_writeback_signal_completion() 720 */ 721 struct drm_writeback_job *writeback_job; 722 723 /** 724 * @max_requested_bpc: Connector property to limit the maximum bit 725 * depth of the pixels. 726 */ 727 u8 max_requested_bpc; 728 729 /** 730 * @max_bpc: Connector max_bpc based on the requested max_bpc property 731 * and the connector bpc limitations obtained from edid. 732 */ 733 u8 max_bpc; 734 735 /** 736 * @hdr_output_metadata: 737 * DRM blob property for HDR output metadata 738 */ 739 struct drm_property_blob *hdr_output_metadata; 740 }; 741 742 /** 743 * struct drm_connector_funcs - control connectors on a given device 744 * 745 * Each CRTC may have one or more connectors attached to it. The functions 746 * below allow the core DRM code to control connectors, enumerate available modes, 747 * etc. 748 */ 749 struct drm_connector_funcs { 750 /** 751 * @dpms: 752 * 753 * Legacy entry point to set the per-connector DPMS state. Legacy DPMS 754 * is exposed as a standard property on the connector, but diverted to 755 * this callback in the drm core. Note that atomic drivers don't 756 * implement the 4 level DPMS support on the connector any more, but 757 * instead only have an on/off "ACTIVE" property on the CRTC object. 758 * 759 * This hook is not used by atomic drivers, remapping of the legacy DPMS 760 * property is entirely handled in the DRM core. 761 * 762 * RETURNS: 763 * 764 * 0 on success or a negative error code on failure. 765 */ 766 int (*dpms)(struct drm_connector *connector, int mode); 767 768 /** 769 * @reset: 770 * 771 * Reset connector hardware and software state to off. This function isn't 772 * called by the core directly, only through drm_mode_config_reset(). 773 * It's not a helper hook only for historical reasons. 774 * 775 * Atomic drivers can use drm_atomic_helper_connector_reset() to reset 776 * atomic state using this hook. 777 */ 778 void (*reset)(struct drm_connector *connector); 779 780 /** 781 * @detect: 782 * 783 * Check to see if anything is attached to the connector. The parameter 784 * force is set to false whilst polling, true when checking the 785 * connector due to a user request. force can be used by the driver to 786 * avoid expensive, destructive operations during automated probing. 787 * 788 * This callback is optional, if not implemented the connector will be 789 * considered as always being attached. 790 * 791 * FIXME: 792 * 793 * Note that this hook is only called by the probe helper. It's not in 794 * the helper library vtable purely for historical reasons. The only DRM 795 * core entry point to probe connector state is @fill_modes. 796 * 797 * Note that the helper library will already hold 798 * &drm_mode_config.connection_mutex. Drivers which need to grab additional 799 * locks to avoid races with concurrent modeset changes need to use 800 * &drm_connector_helper_funcs.detect_ctx instead. 801 * 802 * RETURNS: 803 * 804 * drm_connector_status indicating the connector's status. 805 */ 806 enum drm_connector_status (*detect)(struct drm_connector *connector, 807 bool force); 808 809 /** 810 * @force: 811 * 812 * This function is called to update internal encoder state when the 813 * connector is forced to a certain state by userspace, either through 814 * the sysfs interfaces or on the kernel cmdline. In that case the 815 * @detect callback isn't called. 816 * 817 * FIXME: 818 * 819 * Note that this hook is only called by the probe helper. It's not in 820 * the helper library vtable purely for historical reasons. The only DRM 821 * core entry point to probe connector state is @fill_modes. 822 */ 823 void (*force)(struct drm_connector *connector); 824 825 /** 826 * @fill_modes: 827 * 828 * Entry point for output detection and basic mode validation. The 829 * driver should reprobe the output if needed (e.g. when hotplug 830 * handling is unreliable), add all detected modes to &drm_connector.modes 831 * and filter out any the device can't support in any configuration. It 832 * also needs to filter out any modes wider or higher than the 833 * parameters max_width and max_height indicate. 834 * 835 * The drivers must also prune any modes no longer valid from 836 * &drm_connector.modes. Furthermore it must update 837 * &drm_connector.status and &drm_connector.edid. If no EDID has been 838 * received for this output connector->edid must be NULL. 839 * 840 * Drivers using the probe helpers should use 841 * drm_helper_probe_single_connector_modes() to implement this 842 * function. 843 * 844 * RETURNS: 845 * 846 * The number of modes detected and filled into &drm_connector.modes. 847 */ 848 int (*fill_modes)(struct drm_connector *connector, uint32_t max_width, uint32_t max_height); 849 850 /** 851 * @set_property: 852 * 853 * This is the legacy entry point to update a property attached to the 854 * connector. 855 * 856 * This callback is optional if the driver does not support any legacy 857 * driver-private properties. For atomic drivers it is not used because 858 * property handling is done entirely in the DRM core. 859 * 860 * RETURNS: 861 * 862 * 0 on success or a negative error code on failure. 863 */ 864 int (*set_property)(struct drm_connector *connector, struct drm_property *property, 865 uint64_t val); 866 867 /** 868 * @late_register: 869 * 870 * This optional hook can be used to register additional userspace 871 * interfaces attached to the connector, light backlight control, i2c, 872 * DP aux or similar interfaces. It is called late in the driver load 873 * sequence from drm_connector_register() when registering all the 874 * core drm connector interfaces. Everything added from this callback 875 * should be unregistered in the early_unregister callback. 876 * 877 * This is called while holding &drm_connector.mutex. 878 * 879 * Returns: 880 * 881 * 0 on success, or a negative error code on failure. 882 */ 883 int (*late_register)(struct drm_connector *connector); 884 885 /** 886 * @early_unregister: 887 * 888 * This optional hook should be used to unregister the additional 889 * userspace interfaces attached to the connector from 890 * late_register(). It is called from drm_connector_unregister(), 891 * early in the driver unload sequence to disable userspace access 892 * before data structures are torndown. 893 * 894 * This is called while holding &drm_connector.mutex. 895 */ 896 void (*early_unregister)(struct drm_connector *connector); 897 898 /** 899 * @destroy: 900 * 901 * Clean up connector resources. This is called at driver unload time 902 * through drm_mode_config_cleanup(). It can also be called at runtime 903 * when a connector is being hot-unplugged for drivers that support 904 * connector hotplugging (e.g. DisplayPort MST). 905 */ 906 void (*destroy)(struct drm_connector *connector); 907 908 /** 909 * @atomic_duplicate_state: 910 * 911 * Duplicate the current atomic state for this connector and return it. 912 * The core and helpers guarantee that any atomic state duplicated with 913 * this hook and still owned by the caller (i.e. not transferred to the 914 * driver by calling &drm_mode_config_funcs.atomic_commit) will be 915 * cleaned up by calling the @atomic_destroy_state hook in this 916 * structure. 917 * 918 * This callback is mandatory for atomic drivers. 919 * 920 * Atomic drivers which don't subclass &struct drm_connector_state should use 921 * drm_atomic_helper_connector_duplicate_state(). Drivers that subclass the 922 * state structure to extend it with driver-private state should use 923 * __drm_atomic_helper_connector_duplicate_state() to make sure shared state is 924 * duplicated in a consistent fashion across drivers. 925 * 926 * It is an error to call this hook before &drm_connector.state has been 927 * initialized correctly. 928 * 929 * NOTE: 930 * 931 * If the duplicate state references refcounted resources this hook must 932 * acquire a reference for each of them. The driver must release these 933 * references again in @atomic_destroy_state. 934 * 935 * RETURNS: 936 * 937 * Duplicated atomic state or NULL when the allocation failed. 938 */ 939 struct drm_connector_state *(*atomic_duplicate_state)(struct drm_connector *connector); 940 941 /** 942 * @atomic_destroy_state: 943 * 944 * Destroy a state duplicated with @atomic_duplicate_state and release 945 * or unreference all resources it references 946 * 947 * This callback is mandatory for atomic drivers. 948 */ 949 void (*atomic_destroy_state)(struct drm_connector *connector, 950 struct drm_connector_state *state); 951 952 /** 953 * @atomic_set_property: 954 * 955 * Decode a driver-private property value and store the decoded value 956 * into the passed-in state structure. Since the atomic core decodes all 957 * standardized properties (even for extensions beyond the core set of 958 * properties which might not be implemented by all drivers) this 959 * requires drivers to subclass the state structure. 960 * 961 * Such driver-private properties should really only be implemented for 962 * truly hardware/vendor specific state. Instead it is preferred to 963 * standardize atomic extension and decode the properties used to expose 964 * such an extension in the core. 965 * 966 * Do not call this function directly, use 967 * drm_atomic_connector_set_property() instead. 968 * 969 * This callback is optional if the driver does not support any 970 * driver-private atomic properties. 971 * 972 * NOTE: 973 * 974 * This function is called in the state assembly phase of atomic 975 * modesets, which can be aborted for any reason (including on 976 * userspace's request to just check whether a configuration would be 977 * possible). Drivers MUST NOT touch any persistent state (hardware or 978 * software) or data structures except the passed in @state parameter. 979 * 980 * Also since userspace controls in which order properties are set this 981 * function must not do any input validation (since the state update is 982 * incomplete and hence likely inconsistent). Instead any such input 983 * validation must be done in the various atomic_check callbacks. 984 * 985 * RETURNS: 986 * 987 * 0 if the property has been found, -EINVAL if the property isn't 988 * implemented by the driver (which shouldn't ever happen, the core only 989 * asks for properties attached to this connector). No other validation 990 * is allowed by the driver. The core already checks that the property 991 * value is within the range (integer, valid enum value, ...) the driver 992 * set when registering the property. 993 */ 994 int (*atomic_set_property)(struct drm_connector *connector, 995 struct drm_connector_state *state, 996 struct drm_property *property, 997 uint64_t val); 998 999 /** 1000 * @atomic_get_property: 1001 * 1002 * Reads out the decoded driver-private property. This is used to 1003 * implement the GETCONNECTOR IOCTL. 1004 * 1005 * Do not call this function directly, use 1006 * drm_atomic_connector_get_property() instead. 1007 * 1008 * This callback is optional if the driver does not support any 1009 * driver-private atomic properties. 1010 * 1011 * RETURNS: 1012 * 1013 * 0 on success, -EINVAL if the property isn't implemented by the 1014 * driver (which shouldn't ever happen, the core only asks for 1015 * properties attached to this connector). 1016 */ 1017 int (*atomic_get_property)(struct drm_connector *connector, 1018 const struct drm_connector_state *state, 1019 struct drm_property *property, 1020 uint64_t *val); 1021 1022 /** 1023 * @atomic_print_state: 1024 * 1025 * If driver subclasses &struct drm_connector_state, it should implement 1026 * this optional hook for printing additional driver specific state. 1027 * 1028 * Do not call this directly, use drm_atomic_connector_print_state() 1029 * instead. 1030 */ 1031 void (*atomic_print_state)(struct drm_printer *p, 1032 const struct drm_connector_state *state); 1033 }; 1034 1035 /** 1036 * struct drm_cmdline_mode - DRM Mode passed through the kernel command-line 1037 * 1038 * Each connector can have an initial mode with additional options 1039 * passed through the kernel command line. This structure allows to 1040 * express those parameters and will be filled by the command-line 1041 * parser. 1042 */ 1043 struct drm_cmdline_mode { 1044 /** 1045 * @name: 1046 * 1047 * Name of the mode. 1048 */ 1049 char name[DRM_DISPLAY_MODE_LEN]; 1050 1051 /** 1052 * @specified: 1053 * 1054 * Has a mode been read from the command-line? 1055 */ 1056 bool specified; 1057 1058 /** 1059 * @refresh_specified: 1060 * 1061 * Did the mode have a preferred refresh rate? 1062 */ 1063 bool refresh_specified; 1064 1065 /** 1066 * @bpp_specified: 1067 * 1068 * Did the mode have a preferred BPP? 1069 */ 1070 bool bpp_specified; 1071 1072 /** 1073 * @xres: 1074 * 1075 * Active resolution on the X axis, in pixels. 1076 */ 1077 int xres; 1078 1079 /** 1080 * @yres: 1081 * 1082 * Active resolution on the Y axis, in pixels. 1083 */ 1084 int yres; 1085 1086 /** 1087 * @bpp: 1088 * 1089 * Bits per pixels for the mode. 1090 */ 1091 int bpp; 1092 1093 /** 1094 * @refresh: 1095 * 1096 * Refresh rate, in Hertz. 1097 */ 1098 int refresh; 1099 1100 /** 1101 * @rb: 1102 * 1103 * Do we need to use reduced blanking? 1104 */ 1105 bool rb; 1106 1107 /** 1108 * @interlace: 1109 * 1110 * The mode is interlaced. 1111 */ 1112 bool interlace; 1113 1114 /** 1115 * @cvt: 1116 * 1117 * The timings will be calculated using the VESA Coordinated 1118 * Video Timings instead of looking up the mode from a table. 1119 */ 1120 bool cvt; 1121 1122 /** 1123 * @margins: 1124 * 1125 * Add margins to the mode calculation (1.8% of xres rounded 1126 * down to 8 pixels and 1.8% of yres). 1127 */ 1128 bool margins; 1129 1130 /** 1131 * @force: 1132 * 1133 * Ignore the hotplug state of the connector, and force its 1134 * state to one of the DRM_FORCE_* values. 1135 */ 1136 enum drm_connector_force force; 1137 1138 /** 1139 * @rotation_reflection: 1140 * 1141 * Initial rotation and reflection of the mode setup from the 1142 * command line. See DRM_MODE_ROTATE_* and 1143 * DRM_MODE_REFLECT_*. The only rotations supported are 1144 * DRM_MODE_ROTATE_0 and DRM_MODE_ROTATE_180. 1145 */ 1146 unsigned int rotation_reflection; 1147 1148 /** 1149 * @panel_orientation: 1150 * 1151 * drm-connector "panel orientation" property override value, 1152 * DRM_MODE_PANEL_ORIENTATION_UNKNOWN if not set. 1153 */ 1154 enum drm_panel_orientation panel_orientation; 1155 1156 /** 1157 * @tv_margins: TV margins to apply to the mode. 1158 */ 1159 struct drm_connector_tv_margins tv_margins; 1160 }; 1161 1162 /** 1163 * struct drm_connector - central DRM connector control structure 1164 * 1165 * Each connector may be connected to one or more CRTCs, or may be clonable by 1166 * another connector if they can share a CRTC. Each connector also has a specific 1167 * position in the broader display (referred to as a 'screen' though it could 1168 * span multiple monitors). 1169 */ 1170 struct drm_connector { 1171 /** @dev: parent DRM device */ 1172 struct drm_device *dev; 1173 /** @kdev: kernel device for sysfs attributes */ 1174 struct device *kdev; 1175 /** @attr: sysfs attributes */ 1176 struct device_attribute *attr; 1177 1178 /** 1179 * @head: 1180 * 1181 * List of all connectors on a @dev, linked from 1182 * &drm_mode_config.connector_list. Protected by 1183 * &drm_mode_config.connector_list_lock, but please only use 1184 * &drm_connector_list_iter to walk this list. 1185 */ 1186 struct list_head head; 1187 1188 /** @base: base KMS object */ 1189 struct drm_mode_object base; 1190 1191 /** @name: human readable name, can be overwritten by the driver */ 1192 char *name; 1193 1194 /** 1195 * @mutex: Lock for general connector state, but currently only protects 1196 * @registered. Most of the connector state is still protected by 1197 * &drm_mode_config.mutex. 1198 */ 1199 struct mutex mutex; 1200 1201 /** 1202 * @index: Compacted connector index, which matches the position inside 1203 * the mode_config.list for drivers not supporting hot-add/removing. Can 1204 * be used as an array index. It is invariant over the lifetime of the 1205 * connector. 1206 */ 1207 unsigned index; 1208 1209 /** 1210 * @connector_type: 1211 * one of the DRM_MODE_CONNECTOR_<foo> types from drm_mode.h 1212 */ 1213 int connector_type; 1214 /** @connector_type_id: index into connector type enum */ 1215 int connector_type_id; 1216 /** 1217 * @interlace_allowed: 1218 * Can this connector handle interlaced modes? Only used by 1219 * drm_helper_probe_single_connector_modes() for mode filtering. 1220 */ 1221 bool interlace_allowed; 1222 /** 1223 * @doublescan_allowed: 1224 * Can this connector handle doublescan? Only used by 1225 * drm_helper_probe_single_connector_modes() for mode filtering. 1226 */ 1227 bool doublescan_allowed; 1228 /** 1229 * @stereo_allowed: 1230 * Can this connector handle stereo modes? Only used by 1231 * drm_helper_probe_single_connector_modes() for mode filtering. 1232 */ 1233 bool stereo_allowed; 1234 1235 /** 1236 * @ycbcr_420_allowed : This bool indicates if this connector is 1237 * capable of handling YCBCR 420 output. While parsing the EDID 1238 * blocks it's very helpful to know if the source is capable of 1239 * handling YCBCR 420 outputs. 1240 */ 1241 bool ycbcr_420_allowed; 1242 1243 /** 1244 * @registration_state: Is this connector initializing, exposed 1245 * (registered) with userspace, or unregistered? 1246 * 1247 * Protected by @mutex. 1248 */ 1249 enum drm_connector_registration_state registration_state; 1250 1251 /** 1252 * @modes: 1253 * Modes available on this connector (from fill_modes() + user). 1254 * Protected by &drm_mode_config.mutex. 1255 */ 1256 struct list_head modes; 1257 1258 /** 1259 * @status: 1260 * One of the drm_connector_status enums (connected, not, or unknown). 1261 * Protected by &drm_mode_config.mutex. 1262 */ 1263 enum drm_connector_status status; 1264 1265 /** 1266 * @probed_modes: 1267 * These are modes added by probing with DDC or the BIOS, before 1268 * filtering is applied. Used by the probe helpers. Protected by 1269 * &drm_mode_config.mutex. 1270 */ 1271 struct list_head probed_modes; 1272 1273 /** 1274 * @display_info: Display information is filled from EDID information 1275 * when a display is detected. For non hot-pluggable displays such as 1276 * flat panels in embedded systems, the driver should initialize the 1277 * &drm_display_info.width_mm and &drm_display_info.height_mm fields 1278 * with the physical size of the display. 1279 * 1280 * Protected by &drm_mode_config.mutex. 1281 */ 1282 struct drm_display_info display_info; 1283 1284 /** @funcs: connector control functions */ 1285 const struct drm_connector_funcs *funcs; 1286 1287 /** 1288 * @edid_blob_ptr: DRM property containing EDID if present. Protected by 1289 * &drm_mode_config.mutex. This should be updated only by calling 1290 * drm_connector_update_edid_property(). 1291 */ 1292 struct drm_property_blob *edid_blob_ptr; 1293 1294 /** @properties: property tracking for this connector */ 1295 struct drm_object_properties properties; 1296 1297 /** 1298 * @scaling_mode_property: Optional atomic property to control the 1299 * upscaling. See drm_connector_attach_content_protection_property(). 1300 */ 1301 struct drm_property *scaling_mode_property; 1302 1303 /** 1304 * @vrr_capable_property: Optional property to help userspace 1305 * query hardware support for variable refresh rate on a connector. 1306 * connector. Drivers can add the property to a connector by 1307 * calling drm_connector_attach_vrr_capable_property(). 1308 * 1309 * This should be updated only by calling 1310 * drm_connector_set_vrr_capable_property(). 1311 */ 1312 struct drm_property *vrr_capable_property; 1313 1314 /** 1315 * @colorspace_property: Connector property to set the suitable 1316 * colorspace supported by the sink. 1317 */ 1318 struct drm_property *colorspace_property; 1319 1320 /** 1321 * @path_blob_ptr: 1322 * 1323 * DRM blob property data for the DP MST path property. This should only 1324 * be updated by calling drm_connector_set_path_property(). 1325 */ 1326 struct drm_property_blob *path_blob_ptr; 1327 1328 /** 1329 * @max_bpc_property: Default connector property for the max bpc to be 1330 * driven out of the connector. 1331 */ 1332 struct drm_property *max_bpc_property; 1333 1334 #define DRM_CONNECTOR_POLL_HPD (1 << 0) 1335 #define DRM_CONNECTOR_POLL_CONNECT (1 << 1) 1336 #define DRM_CONNECTOR_POLL_DISCONNECT (1 << 2) 1337 1338 /** 1339 * @polled: 1340 * 1341 * Connector polling mode, a combination of 1342 * 1343 * DRM_CONNECTOR_POLL_HPD 1344 * The connector generates hotplug events and doesn't need to be 1345 * periodically polled. The CONNECT and DISCONNECT flags must not 1346 * be set together with the HPD flag. 1347 * 1348 * DRM_CONNECTOR_POLL_CONNECT 1349 * Periodically poll the connector for connection. 1350 * 1351 * DRM_CONNECTOR_POLL_DISCONNECT 1352 * Periodically poll the connector for disconnection, without 1353 * causing flickering even when the connector is in use. DACs should 1354 * rarely do this without a lot of testing. 1355 * 1356 * Set to 0 for connectors that don't support connection status 1357 * discovery. 1358 */ 1359 uint8_t polled; 1360 1361 /** 1362 * @dpms: Current dpms state. For legacy drivers the 1363 * &drm_connector_funcs.dpms callback must update this. For atomic 1364 * drivers, this is handled by the core atomic code, and drivers must 1365 * only take &drm_crtc_state.active into account. 1366 */ 1367 int dpms; 1368 1369 /** @helper_private: mid-layer private data */ 1370 const struct drm_connector_helper_funcs *helper_private; 1371 1372 /** @cmdline_mode: mode line parsed from the kernel cmdline for this connector */ 1373 struct drm_cmdline_mode cmdline_mode; 1374 /** @force: a DRM_FORCE_<foo> state for forced mode sets */ 1375 enum drm_connector_force force; 1376 /** @override_edid: has the EDID been overwritten through debugfs for testing? */ 1377 bool override_edid; 1378 /** @epoch_counter: used to detect any other changes in connector, besides status */ 1379 u64 epoch_counter; 1380 1381 /** 1382 * @possible_encoders: Bit mask of encoders that can drive this 1383 * connector, drm_encoder_index() determines the index into the bitfield 1384 * and the bits are set with drm_connector_attach_encoder(). 1385 */ 1386 u32 possible_encoders; 1387 1388 /** 1389 * @encoder: Currently bound encoder driving this connector, if any. 1390 * Only really meaningful for non-atomic drivers. Atomic drivers should 1391 * instead look at &drm_connector_state.best_encoder, and in case they 1392 * need the CRTC driving this output, &drm_connector_state.crtc. 1393 */ 1394 struct drm_encoder *encoder; 1395 1396 #define MAX_ELD_BYTES 128 1397 /** @eld: EDID-like data, if present */ 1398 uint8_t eld[MAX_ELD_BYTES]; 1399 /** @latency_present: AV delay info from ELD, if found */ 1400 bool latency_present[2]; 1401 /** 1402 * @video_latency: Video latency info from ELD, if found. 1403 * [0]: progressive, [1]: interlaced 1404 */ 1405 int video_latency[2]; 1406 /** 1407 * @audio_latency: audio latency info from ELD, if found 1408 * [0]: progressive, [1]: interlaced 1409 */ 1410 int audio_latency[2]; 1411 1412 /** 1413 * @ddc: associated ddc adapter. 1414 * A connector usually has its associated ddc adapter. If a driver uses 1415 * this field, then an appropriate symbolic link is created in connector 1416 * sysfs directory to make it easy for the user to tell which i2c 1417 * adapter is for a particular display. 1418 * 1419 * The field should be set by calling drm_connector_init_with_ddc(). 1420 */ 1421 struct i2c_adapter *ddc; 1422 1423 /** 1424 * @null_edid_counter: track sinks that give us all zeros for the EDID. 1425 * Needed to workaround some HW bugs where we get all 0s 1426 */ 1427 int null_edid_counter; 1428 1429 /** @bad_edid_counter: track sinks that give us an EDID with invalid checksum */ 1430 unsigned bad_edid_counter; 1431 1432 /** 1433 * @edid_corrupt: Indicates whether the last read EDID was corrupt. Used 1434 * in Displayport compliance testing - Displayport Link CTS Core 1.2 1435 * rev1.1 4.2.2.6 1436 */ 1437 bool edid_corrupt; 1438 /** 1439 * @real_edid_checksum: real edid checksum for corrupted edid block. 1440 * Required in Displayport 1.4 compliance testing 1441 * rev1.1 4.2.2.6 1442 */ 1443 u8 real_edid_checksum; 1444 1445 /** @debugfs_entry: debugfs directory for this connector */ 1446 struct dentry *debugfs_entry; 1447 1448 /** 1449 * @state: 1450 * 1451 * Current atomic state for this connector. 1452 * 1453 * This is protected by &drm_mode_config.connection_mutex. Note that 1454 * nonblocking atomic commits access the current connector state without 1455 * taking locks. Either by going through the &struct drm_atomic_state 1456 * pointers, see for_each_oldnew_connector_in_state(), 1457 * for_each_old_connector_in_state() and 1458 * for_each_new_connector_in_state(). Or through careful ordering of 1459 * atomic commit operations as implemented in the atomic helpers, see 1460 * &struct drm_crtc_commit. 1461 */ 1462 struct drm_connector_state *state; 1463 1464 /* DisplayID bits. FIXME: Extract into a substruct? */ 1465 1466 /** 1467 * @tile_blob_ptr: 1468 * 1469 * DRM blob property data for the tile property (used mostly by DP MST). 1470 * This is meant for screens which are driven through separate display 1471 * pipelines represented by &drm_crtc, which might not be running with 1472 * genlocked clocks. For tiled panels which are genlocked, like 1473 * dual-link LVDS or dual-link DSI, the driver should try to not expose 1474 * the tiling and virtualize both &drm_crtc and &drm_plane if needed. 1475 * 1476 * This should only be updated by calling 1477 * drm_connector_set_tile_property(). 1478 */ 1479 struct drm_property_blob *tile_blob_ptr; 1480 1481 /** @has_tile: is this connector connected to a tiled monitor */ 1482 bool has_tile; 1483 /** @tile_group: tile group for the connected monitor */ 1484 struct drm_tile_group *tile_group; 1485 /** @tile_is_single_monitor: whether the tile is one monitor housing */ 1486 bool tile_is_single_monitor; 1487 1488 /** @num_h_tile: number of horizontal tiles in the tile group */ 1489 /** @num_v_tile: number of vertical tiles in the tile group */ 1490 uint8_t num_h_tile, num_v_tile; 1491 /** @tile_h_loc: horizontal location of this tile */ 1492 /** @tile_v_loc: vertical location of this tile */ 1493 uint8_t tile_h_loc, tile_v_loc; 1494 /** @tile_h_size: horizontal size of this tile. */ 1495 /** @tile_v_size: vertical size of this tile. */ 1496 uint16_t tile_h_size, tile_v_size; 1497 1498 /** 1499 * @free_node: 1500 * 1501 * List used only by &drm_connector_list_iter to be able to clean up a 1502 * connector from any context, in conjunction with 1503 * &drm_mode_config.connector_free_work. 1504 */ 1505 struct llist_node free_node; 1506 1507 /** @hdr_sink_metadata: HDR Metadata Information read from sink */ 1508 struct hdr_sink_metadata hdr_sink_metadata; 1509 }; 1510 1511 #define obj_to_connector(x) container_of(x, struct drm_connector, base) 1512 1513 int drm_connector_init(struct drm_device *dev, 1514 struct drm_connector *connector, 1515 const struct drm_connector_funcs *funcs, 1516 int connector_type); 1517 int drm_connector_init_with_ddc(struct drm_device *dev, 1518 struct drm_connector *connector, 1519 const struct drm_connector_funcs *funcs, 1520 int connector_type, 1521 struct i2c_adapter *ddc); 1522 void drm_connector_attach_edid_property(struct drm_connector *connector); 1523 int drm_connector_register(struct drm_connector *connector); 1524 void drm_connector_unregister(struct drm_connector *connector); 1525 int drm_connector_attach_encoder(struct drm_connector *connector, 1526 struct drm_encoder *encoder); 1527 1528 void drm_connector_cleanup(struct drm_connector *connector); 1529 1530 static inline unsigned int drm_connector_index(const struct drm_connector *connector) 1531 { 1532 return connector->index; 1533 } 1534 1535 static inline u32 drm_connector_mask(const struct drm_connector *connector) 1536 { 1537 return 1 << connector->index; 1538 } 1539 1540 /** 1541 * drm_connector_lookup - lookup connector object 1542 * @dev: DRM device 1543 * @file_priv: drm file to check for lease against. 1544 * @id: connector object id 1545 * 1546 * This function looks up the connector object specified by id 1547 * add takes a reference to it. 1548 */ 1549 static inline struct drm_connector *drm_connector_lookup(struct drm_device *dev, 1550 struct drm_file *file_priv, 1551 uint32_t id) 1552 { 1553 struct drm_mode_object *mo; 1554 mo = drm_mode_object_find(dev, file_priv, id, DRM_MODE_OBJECT_CONNECTOR); 1555 return mo ? obj_to_connector(mo) : NULL; 1556 } 1557 1558 /** 1559 * drm_connector_get - acquire a connector reference 1560 * @connector: DRM connector 1561 * 1562 * This function increments the connector's refcount. 1563 */ 1564 static inline void drm_connector_get(struct drm_connector *connector) 1565 { 1566 drm_mode_object_get(&connector->base); 1567 } 1568 1569 /** 1570 * drm_connector_put - release a connector reference 1571 * @connector: DRM connector 1572 * 1573 * This function decrements the connector's reference count and frees the 1574 * object if the reference count drops to zero. 1575 */ 1576 static inline void drm_connector_put(struct drm_connector *connector) 1577 { 1578 drm_mode_object_put(&connector->base); 1579 } 1580 1581 /** 1582 * drm_connector_is_unregistered - has the connector been unregistered from 1583 * userspace? 1584 * @connector: DRM connector 1585 * 1586 * Checks whether or not @connector has been unregistered from userspace. 1587 * 1588 * Returns: 1589 * True if the connector was unregistered, false if the connector is 1590 * registered or has not yet been registered with userspace. 1591 */ 1592 static inline bool 1593 drm_connector_is_unregistered(struct drm_connector *connector) 1594 { 1595 return READ_ONCE(connector->registration_state) == 1596 DRM_CONNECTOR_UNREGISTERED; 1597 } 1598 1599 const char *drm_get_connector_type_name(unsigned int connector_type); 1600 const char *drm_get_connector_status_name(enum drm_connector_status status); 1601 const char *drm_get_subpixel_order_name(enum subpixel_order order); 1602 const char *drm_get_dpms_name(int val); 1603 const char *drm_get_dvi_i_subconnector_name(int val); 1604 const char *drm_get_dvi_i_select_name(int val); 1605 const char *drm_get_tv_subconnector_name(int val); 1606 const char *drm_get_tv_select_name(int val); 1607 const char *drm_get_dp_subconnector_name(int val); 1608 const char *drm_get_content_protection_name(int val); 1609 const char *drm_get_hdcp_content_type_name(int val); 1610 1611 int drm_mode_create_dvi_i_properties(struct drm_device *dev); 1612 void drm_connector_attach_dp_subconnector_property(struct drm_connector *connector); 1613 1614 int drm_mode_create_tv_margin_properties(struct drm_device *dev); 1615 int drm_mode_create_tv_properties(struct drm_device *dev, 1616 unsigned int num_modes, 1617 const char * const modes[]); 1618 void drm_connector_attach_tv_margin_properties(struct drm_connector *conn); 1619 int drm_mode_create_scaling_mode_property(struct drm_device *dev); 1620 int drm_connector_attach_content_type_property(struct drm_connector *dev); 1621 int drm_connector_attach_scaling_mode_property(struct drm_connector *connector, 1622 u32 scaling_mode_mask); 1623 int drm_connector_attach_vrr_capable_property( 1624 struct drm_connector *connector); 1625 int drm_mode_create_aspect_ratio_property(struct drm_device *dev); 1626 int drm_mode_create_hdmi_colorspace_property(struct drm_connector *connector); 1627 int drm_mode_create_dp_colorspace_property(struct drm_connector *connector); 1628 int drm_mode_create_content_type_property(struct drm_device *dev); 1629 void drm_hdmi_avi_infoframe_content_type(struct hdmi_avi_infoframe *frame, 1630 const struct drm_connector_state *conn_state); 1631 1632 int drm_mode_create_suggested_offset_properties(struct drm_device *dev); 1633 1634 int drm_connector_set_path_property(struct drm_connector *connector, 1635 const char *path); 1636 int drm_connector_set_tile_property(struct drm_connector *connector); 1637 int drm_connector_update_edid_property(struct drm_connector *connector, 1638 const struct edid *edid); 1639 void drm_connector_set_link_status_property(struct drm_connector *connector, 1640 uint64_t link_status); 1641 void drm_connector_set_vrr_capable_property( 1642 struct drm_connector *connector, bool capable); 1643 int drm_connector_set_panel_orientation( 1644 struct drm_connector *connector, 1645 enum drm_panel_orientation panel_orientation); 1646 int drm_connector_set_panel_orientation_with_quirk( 1647 struct drm_connector *connector, 1648 enum drm_panel_orientation panel_orientation, 1649 int width, int height); 1650 int drm_connector_attach_max_bpc_property(struct drm_connector *connector, 1651 int min, int max); 1652 1653 /** 1654 * struct drm_tile_group - Tile group metadata 1655 * @refcount: reference count 1656 * @dev: DRM device 1657 * @id: tile group id exposed to userspace 1658 * @group_data: Sink-private data identifying this group 1659 * 1660 * @group_data corresponds to displayid vend/prod/serial for external screens 1661 * with an EDID. 1662 */ 1663 struct drm_tile_group { 1664 struct kref refcount; 1665 struct drm_device *dev; 1666 int id; 1667 u8 group_data[8]; 1668 }; 1669 1670 struct drm_tile_group *drm_mode_create_tile_group(struct drm_device *dev, 1671 const char topology[8]); 1672 struct drm_tile_group *drm_mode_get_tile_group(struct drm_device *dev, 1673 const char topology[8]); 1674 void drm_mode_put_tile_group(struct drm_device *dev, 1675 struct drm_tile_group *tg); 1676 1677 /** 1678 * struct drm_connector_list_iter - connector_list iterator 1679 * 1680 * This iterator tracks state needed to be able to walk the connector_list 1681 * within struct drm_mode_config. Only use together with 1682 * drm_connector_list_iter_begin(), drm_connector_list_iter_end() and 1683 * drm_connector_list_iter_next() respectively the convenience macro 1684 * drm_for_each_connector_iter(). 1685 */ 1686 struct drm_connector_list_iter { 1687 /* private: */ 1688 struct drm_device *dev; 1689 struct drm_connector *conn; 1690 }; 1691 1692 void drm_connector_list_iter_begin(struct drm_device *dev, 1693 struct drm_connector_list_iter *iter); 1694 struct drm_connector * 1695 drm_connector_list_iter_next(struct drm_connector_list_iter *iter); 1696 void drm_connector_list_iter_end(struct drm_connector_list_iter *iter); 1697 1698 bool drm_connector_has_possible_encoder(struct drm_connector *connector, 1699 struct drm_encoder *encoder); 1700 1701 /** 1702 * drm_for_each_connector_iter - connector_list iterator macro 1703 * @connector: &struct drm_connector pointer used as cursor 1704 * @iter: &struct drm_connector_list_iter 1705 * 1706 * Note that @connector is only valid within the list body, if you want to use 1707 * @connector after calling drm_connector_list_iter_end() then you need to grab 1708 * your own reference first using drm_connector_get(). 1709 */ 1710 #define drm_for_each_connector_iter(connector, iter) \ 1711 while ((connector = drm_connector_list_iter_next(iter))) 1712 1713 /** 1714 * drm_connector_for_each_possible_encoder - iterate connector's possible encoders 1715 * @connector: &struct drm_connector pointer 1716 * @encoder: &struct drm_encoder pointer used as cursor 1717 */ 1718 #define drm_connector_for_each_possible_encoder(connector, encoder) \ 1719 drm_for_each_encoder_mask(encoder, (connector)->dev, \ 1720 (connector)->possible_encoders) 1721 1722 #endif 1723