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