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1/*
2 * Copyright (c) 2016 Intel Corporation
3 *
4 * Permission to use, copy, modify, distribute, and sell this software and its
5 * documentation for any purpose is hereby granted without fee, provided that
6 * the above copyright notice appear in all copies and that both that copyright
7 * notice and this permission notice appear in supporting documentation, and
8 * that the name of the copyright holders not be used in advertising or
9 * publicity pertaining to distribution of the software without specific,
10 * written prior permission. The copyright holders make no representations
11 * about the suitability of this software for any purpose. It is provided "as
12 * is" without express or implied warranty.
13 *
14 * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
15 * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
16 * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
17 * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
18 * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
19 * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
20 * OF THIS SOFTWARE.
21 */
22
23#ifndef __DRM_CONNECTOR_H__
24#define __DRM_CONNECTOR_H__
25
26#include <linux/list.h>
27#include <linux/ctype.h>
28#include <drm/drm_mode_object.h>
29
30#include <uapi/drm/drm_mode.h>
31
32struct drm_device;
33
34struct drm_connector_helper_funcs;
35struct drm_device;
36struct drm_crtc;
37struct drm_encoder;
38struct drm_property;
39struct drm_property_blob;
40struct drm_printer;
41struct edid;
42
43enum drm_connector_force {
44 DRM_FORCE_UNSPECIFIED,
45 DRM_FORCE_OFF,
46 DRM_FORCE_ON, /* force on analog part normally */
47 DRM_FORCE_ON_DIGITAL, /* for DVI-I use digital connector */
48};
49
50/**
51 * enum drm_connector_status - status for a &drm_connector
52 *
53 * This enum is used to track the connector status. There are no separate
54 * #defines for the uapi!
55 */
56enum drm_connector_status {
57 /**
58 * @connector_status_connected: The connector is definitely connected to
59 * a sink device, and can be enabled.
60 */
61 connector_status_connected = 1,
62 /**
63 * @connector_status_disconnected: The connector isn't connected to a
64 * sink device which can be autodetect. For digital outputs like DP or
65 * HDMI (which can be realiable probed) this means there's really
66 * nothing there. It is driver-dependent whether a connector with this
67 * status can be lit up or not.
68 */
69 connector_status_disconnected = 2,
70 /**
71 * @connector_status_unknown: The connector's status could not be
72 * reliably detected. This happens when probing would either cause
73 * flicker (like load-detection when the connector is in use), or when a
74 * hardware resource isn't available (like when load-detection needs a
75 * free CRTC). It should be possible to light up the connector with one
76 * of the listed fallback modes. For default configuration userspace
77 * should only try to light up connectors with unknown status when
78 * there's not connector with @connector_status_connected.
79 */
80 connector_status_unknown = 3,
81};
82
83enum subpixel_order {
84 SubPixelUnknown = 0,
85 SubPixelHorizontalRGB,
86 SubPixelHorizontalBGR,
87 SubPixelVerticalRGB,
88 SubPixelVerticalBGR,
89 SubPixelNone,
90};
91
92/**
93 * struct drm_display_info - runtime data about the connected sink
94 *
95 * Describes a given display (e.g. CRT or flat panel) and its limitations. For
96 * fixed display sinks like built-in panels there's not much difference between
97 * this and struct &drm_connector. But for sinks with a real cable this
98 * structure is meant to describe all the things at the other end of the cable.
99 *
100 * For sinks which provide an EDID this can be filled out by calling
101 * drm_add_edid_modes().
102 */
103struct drm_display_info {
104 /**
105 * @name: Name of the display.
106 */
107 char name[DRM_DISPLAY_INFO_LEN];
108
109 /**
110 * @width_mm: Physical width in mm.
111 */
112 unsigned int width_mm;
113 /**
114 * @height_mm: Physical height in mm.
115 */
116 unsigned int height_mm;
117
118 /**
119 * @pixel_clock: Maximum pixel clock supported by the sink, in units of
120 * 100Hz. This mismatches the clok in &drm_display_mode (which is in
121 * kHZ), because that's what the EDID uses as base unit.
122 */
123 unsigned int pixel_clock;
124 /**
125 * @bpc: Maximum bits per color channel. Used by HDMI and DP outputs.
126 */
127 unsigned int bpc;
128
129 /**
130 * @subpixel_order: Subpixel order of LCD panels.
131 */
132 enum subpixel_order subpixel_order;
133
134#define DRM_COLOR_FORMAT_RGB444 (1<<0)
135#define DRM_COLOR_FORMAT_YCRCB444 (1<<1)
136#define DRM_COLOR_FORMAT_YCRCB422 (1<<2)
137
138 /**
139 * @color_formats: HDMI Color formats, selects between RGB and YCrCb
140 * modes. Used DRM_COLOR_FORMAT\_ defines, which are _not_ the same ones
141 * as used to describe the pixel format in framebuffers, and also don't
142 * match the formats in @bus_formats which are shared with v4l.
143 */
144 u32 color_formats;
145
146 /**
147 * @bus_formats: Pixel data format on the wire, somewhat redundant with
148 * @color_formats. Array of size @num_bus_formats encoded using
149 * MEDIA_BUS_FMT\_ defines shared with v4l and media drivers.
150 */
151 const u32 *bus_formats;
152 /**
153 * @num_bus_formats: Size of @bus_formats array.
154 */
155 unsigned int num_bus_formats;
156
157#define DRM_BUS_FLAG_DE_LOW (1<<0)
158#define DRM_BUS_FLAG_DE_HIGH (1<<1)
159/* drive data on pos. edge */
160#define DRM_BUS_FLAG_PIXDATA_POSEDGE (1<<2)
161/* drive data on neg. edge */
162#define DRM_BUS_FLAG_PIXDATA_NEGEDGE (1<<3)
163
164 /**
165 * @bus_flags: Additional information (like pixel signal polarity) for
166 * the pixel data on the bus, using DRM_BUS_FLAGS\_ defines.
167 */
168 u32 bus_flags;
169
170 /**
171 * @max_tmds_clock: Maximum TMDS clock rate supported by the
172 * sink in kHz. 0 means undefined.
173 */
174 int max_tmds_clock;
175
176 /**
177 * @dvi_dual: Dual-link DVI sink?
178 */
179 bool dvi_dual;
180
181 /**
182 * @edid_hdmi_dc_modes: Mask of supported hdmi deep color modes. Even
183 * more stuff redundant with @bus_formats.
184 */
185 u8 edid_hdmi_dc_modes;
186
187 /**
188 * @cea_rev: CEA revision of the HDMI sink.
189 */
190 u8 cea_rev;
191};
192
193int drm_display_info_set_bus_formats(struct drm_display_info *info,
194 const u32 *formats,
195 unsigned int num_formats);
196
197/**
198 * struct drm_tv_connector_state - TV connector related states
199 * @subconnector: selected subconnector
200 * @margins: left/right/top/bottom margins
201 * @mode: TV mode
202 * @brightness: brightness in percent
203 * @contrast: contrast in percent
204 * @flicker_reduction: flicker reduction in percent
205 * @overscan: overscan in percent
206 * @saturation: saturation in percent
207 * @hue: hue in percent
208 */
209struct drm_tv_connector_state {
210 enum drm_mode_subconnector subconnector;
211 struct {
212 unsigned int left;
213 unsigned int right;
214 unsigned int top;
215 unsigned int bottom;
216 } margins;
217 unsigned int mode;
218 unsigned int brightness;
219 unsigned int contrast;
220 unsigned int flicker_reduction;
221 unsigned int overscan;
222 unsigned int saturation;
223 unsigned int hue;
224};
225
226/**
227 * struct drm_connector_state - mutable connector state
228 * @connector: backpointer to the connector
229 * @best_encoder: can be used by helpers and drivers to select the encoder
230 * @state: backpointer to global drm_atomic_state
231 * @tv: TV connector state
232 */
233struct drm_connector_state {
234 struct drm_connector *connector;
235
236 /**
237 * @crtc: CRTC to connect connector to, NULL if disabled.
238 *
239 * Do not change this directly, use drm_atomic_set_crtc_for_connector()
240 * instead.
241 */
242 struct drm_crtc *crtc;
243
244 struct drm_encoder *best_encoder;
245
246 struct drm_atomic_state *state;
247
248 struct drm_tv_connector_state tv;
249};
250
251/**
252 * struct drm_connector_funcs - control connectors on a given device
253 *
254 * Each CRTC may have one or more connectors attached to it. The functions
255 * below allow the core DRM code to control connectors, enumerate available modes,
256 * etc.
257 */
258struct drm_connector_funcs {
259 /**
260 * @dpms:
261 *
262 * Legacy entry point to set the per-connector DPMS state. Legacy DPMS
263 * is exposed as a standard property on the connector, but diverted to
264 * this callback in the drm core. Note that atomic drivers don't
265 * implement the 4 level DPMS support on the connector any more, but
266 * instead only have an on/off "ACTIVE" property on the CRTC object.
267 *
268 * Drivers implementing atomic modeset should use
269 * drm_atomic_helper_connector_dpms() to implement this hook.
270 *
271 * RETURNS:
272 *
273 * 0 on success or a negative error code on failure.
274 */
275 int (*dpms)(struct drm_connector *connector, int mode);
276
277 /**
278 * @reset:
279 *
280 * Reset connector hardware and software state to off. This function isn't
281 * called by the core directly, only through drm_mode_config_reset().
282 * It's not a helper hook only for historical reasons.
283 *
284 * Atomic drivers can use drm_atomic_helper_connector_reset() to reset
285 * atomic state using this hook.
286 */
287 void (*reset)(struct drm_connector *connector);
288
289 /**
290 * @detect:
291 *
292 * Check to see if anything is attached to the connector. The parameter
293 * force is set to false whilst polling, true when checking the
294 * connector due to a user request. force can be used by the driver to
295 * avoid expensive, destructive operations during automated probing.
296 *
297 * This callback is optional, if not implemented the connector will be
298 * considered as always being attached.
299 *
300 * FIXME:
301 *
302 * Note that this hook is only called by the probe helper. It's not in
303 * the helper library vtable purely for historical reasons. The only DRM
304 * core entry point to probe connector state is @fill_modes.
305 *
306 * RETURNS:
307 *
308 * drm_connector_status indicating the connector's status.
309 */
310 enum drm_connector_status (*detect)(struct drm_connector *connector,
311 bool force);
312
313 /**
314 * @force:
315 *
316 * This function is called to update internal encoder state when the
317 * connector is forced to a certain state by userspace, either through
318 * the sysfs interfaces or on the kernel cmdline. In that case the
319 * @detect callback isn't called.
320 *
321 * FIXME:
322 *
323 * Note that this hook is only called by the probe helper. It's not in
324 * the helper library vtable purely for historical reasons. The only DRM
325 * core entry point to probe connector state is @fill_modes.
326 */
327 void (*force)(struct drm_connector *connector);
328
329 /**
330 * @fill_modes:
331 *
332 * Entry point for output detection and basic mode validation. The
333 * driver should reprobe the output if needed (e.g. when hotplug
334 * handling is unreliable), add all detected modes to connector->modes
335 * and filter out any the device can't support in any configuration. It
336 * also needs to filter out any modes wider or higher than the
337 * parameters max_width and max_height indicate.
338 *
339 * The drivers must also prune any modes no longer valid from
340 * connector->modes. Furthermore it must update connector->status and
341 * connector->edid. If no EDID has been received for this output
342 * connector->edid must be NULL.
343 *
344 * Drivers using the probe helpers should use
345 * drm_helper_probe_single_connector_modes() or
346 * drm_helper_probe_single_connector_modes_nomerge() to implement this
347 * function.
348 *
349 * RETURNS:
350 *
351 * The number of modes detected and filled into connector->modes.
352 */
353 int (*fill_modes)(struct drm_connector *connector, uint32_t max_width, uint32_t max_height);
354
355 /**
356 * @set_property:
357 *
358 * This is the legacy entry point to update a property attached to the
359 * connector.
360 *
361 * Drivers implementing atomic modeset should use
362 * drm_atomic_helper_connector_set_property() to implement this hook.
363 *
364 * This callback is optional if the driver does not support any legacy
365 * driver-private properties.
366 *
367 * RETURNS:
368 *
369 * 0 on success or a negative error code on failure.
370 */
371 int (*set_property)(struct drm_connector *connector, struct drm_property *property,
372 uint64_t val);
373
374 /**
375 * @late_register:
376 *
377 * This optional hook can be used to register additional userspace
378 * interfaces attached to the connector, light backlight control, i2c,
379 * DP aux or similar interfaces. It is called late in the driver load
380 * sequence from drm_connector_register() when registering all the
381 * core drm connector interfaces. Everything added from this callback
382 * should be unregistered in the early_unregister callback.
383 *
384 * This is called while holding drm_connector->mutex.
385 *
386 * Returns:
387 *
388 * 0 on success, or a negative error code on failure.
389 */
390 int (*late_register)(struct drm_connector *connector);
391
392 /**
393 * @early_unregister:
394 *
395 * This optional hook should be used to unregister the additional
396 * userspace interfaces attached to the connector from
397 * late_register(). It is called from drm_connector_unregister(),
398 * early in the driver unload sequence to disable userspace access
399 * before data structures are torndown.
400 *
401 * This is called while holding drm_connector->mutex.
402 */
403 void (*early_unregister)(struct drm_connector *connector);
404
405 /**
406 * @destroy:
407 *
408 * Clean up connector resources. This is called at driver unload time
409 * through drm_mode_config_cleanup(). It can also be called at runtime
410 * when a connector is being hot-unplugged for drivers that support
411 * connector hotplugging (e.g. DisplayPort MST).
412 */
413 void (*destroy)(struct drm_connector *connector);
414
415 /**
416 * @atomic_duplicate_state:
417 *
418 * Duplicate the current atomic state for this connector and return it.
419 * The core and helpers guarantee that any atomic state duplicated with
420 * this hook and still owned by the caller (i.e. not transferred to the
421 * driver by calling ->atomic_commit() from struct
422 * &drm_mode_config_funcs) will be cleaned up by calling the
423 * @atomic_destroy_state hook in this structure.
424 *
425 * Atomic drivers which don't subclass struct &drm_connector_state should use
426 * drm_atomic_helper_connector_duplicate_state(). Drivers that subclass the
427 * state structure to extend it with driver-private state should use
428 * __drm_atomic_helper_connector_duplicate_state() to make sure shared state is
429 * duplicated in a consistent fashion across drivers.
430 *
431 * It is an error to call this hook before connector->state has been
432 * initialized correctly.
433 *
434 * NOTE:
435 *
436 * If the duplicate state references refcounted resources this hook must
437 * acquire a reference for each of them. The driver must release these
438 * references again in @atomic_destroy_state.
439 *
440 * RETURNS:
441 *
442 * Duplicated atomic state or NULL when the allocation failed.
443 */
444 struct drm_connector_state *(*atomic_duplicate_state)(struct drm_connector *connector);
445
446 /**
447 * @atomic_destroy_state:
448 *
449 * Destroy a state duplicated with @atomic_duplicate_state and release
450 * or unreference all resources it references
451 */
452 void (*atomic_destroy_state)(struct drm_connector *connector,
453 struct drm_connector_state *state);
454
455 /**
456 * @atomic_set_property:
457 *
458 * Decode a driver-private property value and store the decoded value
459 * into the passed-in state structure. Since the atomic core decodes all
460 * standardized properties (even for extensions beyond the core set of
461 * properties which might not be implemented by all drivers) this
462 * requires drivers to subclass the state structure.
463 *
464 * Such driver-private properties should really only be implemented for
465 * truly hardware/vendor specific state. Instead it is preferred to
466 * standardize atomic extension and decode the properties used to expose
467 * such an extension in the core.
468 *
469 * Do not call this function directly, use
470 * drm_atomic_connector_set_property() instead.
471 *
472 * This callback is optional if the driver does not support any
473 * driver-private atomic properties.
474 *
475 * NOTE:
476 *
477 * This function is called in the state assembly phase of atomic
478 * modesets, which can be aborted for any reason (including on
479 * userspace's request to just check whether a configuration would be
480 * possible). Drivers MUST NOT touch any persistent state (hardware or
481 * software) or data structures except the passed in @state parameter.
482 *
483 * Also since userspace controls in which order properties are set this
484 * function must not do any input validation (since the state update is
485 * incomplete and hence likely inconsistent). Instead any such input
486 * validation must be done in the various atomic_check callbacks.
487 *
488 * RETURNS:
489 *
490 * 0 if the property has been found, -EINVAL if the property isn't
491 * implemented by the driver (which shouldn't ever happen, the core only
492 * asks for properties attached to this connector). No other validation
493 * is allowed by the driver. The core already checks that the property
494 * value is within the range (integer, valid enum value, ...) the driver
495 * set when registering the property.
496 */
497 int (*atomic_set_property)(struct drm_connector *connector,
498 struct drm_connector_state *state,
499 struct drm_property *property,
500 uint64_t val);
501
502 /**
503 * @atomic_get_property:
504 *
505 * Reads out the decoded driver-private property. This is used to
506 * implement the GETCONNECTOR IOCTL.
507 *
508 * Do not call this function directly, use
509 * drm_atomic_connector_get_property() instead.
510 *
511 * This callback is optional if the driver does not support any
512 * driver-private atomic properties.
513 *
514 * RETURNS:
515 *
516 * 0 on success, -EINVAL if the property isn't implemented by the
517 * driver (which shouldn't ever happen, the core only asks for
518 * properties attached to this connector).
519 */
520 int (*atomic_get_property)(struct drm_connector *connector,
521 const struct drm_connector_state *state,
522 struct drm_property *property,
523 uint64_t *val);
524
525 /**
526 * @atomic_print_state:
527 *
528 * If driver subclasses struct &drm_connector_state, it should implement
529 * this optional hook for printing additional driver specific state.
530 *
531 * Do not call this directly, use drm_atomic_connector_print_state()
532 * instead.
533 */
534 void (*atomic_print_state)(struct drm_printer *p,
535 const struct drm_connector_state *state);
536};
537
538/* mode specified on the command line */
539struct drm_cmdline_mode {
540 bool specified;
541 bool refresh_specified;
542 bool bpp_specified;
543 int xres, yres;
544 int bpp;
545 int refresh;
546 bool rb;
547 bool interlace;
548 bool cvt;
549 bool margins;
550 enum drm_connector_force force;
551};
552
553/**
554 * struct drm_connector - central DRM connector control structure
555 * @dev: parent DRM device
556 * @kdev: kernel device for sysfs attributes
557 * @attr: sysfs attributes
558 * @head: list management
559 * @base: base KMS object
560 * @name: human readable name, can be overwritten by the driver
561 * @connector_type: one of the DRM_MODE_CONNECTOR_<foo> types from drm_mode.h
562 * @connector_type_id: index into connector type enum
563 * @interlace_allowed: can this connector handle interlaced modes?
564 * @doublescan_allowed: can this connector handle doublescan?
565 * @stereo_allowed: can this connector handle stereo modes?
566 * @modes: modes available on this connector (from fill_modes() + user)
567 * @status: one of the drm_connector_status enums (connected, not, or unknown)
568 * @probed_modes: list of modes derived directly from the display
569 * @funcs: connector control functions
570 * @edid_blob_ptr: DRM property containing EDID if present
571 * @properties: property tracking for this connector
572 * @dpms: current dpms state
573 * @helper_private: mid-layer private data
574 * @cmdline_mode: mode line parsed from the kernel cmdline for this connector
575 * @force: a DRM_FORCE_<foo> state for forced mode sets
576 * @override_edid: has the EDID been overwritten through debugfs for testing?
577 * @encoder_ids: valid encoders for this connector
578 * @encoder: encoder driving this connector, if any
579 * @eld: EDID-like data, if present
580 * @latency_present: AV delay info from ELD, if found
581 * @video_latency: video latency info from ELD, if found
582 * @audio_latency: audio latency info from ELD, if found
583 * @null_edid_counter: track sinks that give us all zeros for the EDID
584 * @bad_edid_counter: track sinks that give us an EDID with invalid checksum
585 * @edid_corrupt: indicates whether the last read EDID was corrupt
586 * @debugfs_entry: debugfs directory for this connector
587 * @state: current atomic state for this connector
588 * @has_tile: is this connector connected to a tiled monitor
589 * @tile_group: tile group for the connected monitor
590 * @tile_is_single_monitor: whether the tile is one monitor housing
591 * @num_h_tile: number of horizontal tiles in the tile group
592 * @num_v_tile: number of vertical tiles in the tile group
593 * @tile_h_loc: horizontal location of this tile
594 * @tile_v_loc: vertical location of this tile
595 * @tile_h_size: horizontal size of this tile.
596 * @tile_v_size: vertical size of this tile.
597 *
598 * Each connector may be connected to one or more CRTCs, or may be clonable by
599 * another connector if they can share a CRTC. Each connector also has a specific
600 * position in the broader display (referred to as a 'screen' though it could
601 * span multiple monitors).
602 */
603struct drm_connector {
604 struct drm_device *dev;
605 struct device *kdev;
606 struct device_attribute *attr;
607 struct list_head head;
608
609 struct drm_mode_object base;
610
611 char *name;
612
613 /**
614 * @mutex: Lock for general connector state, but currently only protects
615 * @registered. Most of the connector state is still protected by the
616 * mutex in &drm_mode_config.
617 */
618 struct mutex mutex;
619
620 /**
621 * @index: Compacted connector index, which matches the position inside
622 * the mode_config.list for drivers not supporting hot-add/removing. Can
623 * be used as an array index. It is invariant over the lifetime of the
624 * connector.
625 */
626 unsigned index;
627
628 int connector_type;
629 int connector_type_id;
630 bool interlace_allowed;
631 bool doublescan_allowed;
632 bool stereo_allowed;
633 /**
634 * @registered: Is this connector exposed (registered) with userspace?
635 * Protected by @mutex.
636 */
637 bool registered;
638 struct list_head modes; /* list of modes on this connector */
639
640 enum drm_connector_status status;
641
642 /* these are modes added by probing with DDC or the BIOS */
643 struct list_head probed_modes;
644
645 /**
646 * @display_info: Display information is filled from EDID information
647 * when a display is detected. For non hot-pluggable displays such as
648 * flat panels in embedded systems, the driver should initialize the
649 * display_info.width_mm and display_info.height_mm fields with the
650 * physical size of the display.
651 */
652 struct drm_display_info display_info;
653 const struct drm_connector_funcs *funcs;
654
655 struct drm_property_blob *edid_blob_ptr;
656 struct drm_object_properties properties;
657
658 /**
659 * @path_blob_ptr:
660 *
661 * DRM blob property data for the DP MST path property.
662 */
663 struct drm_property_blob *path_blob_ptr;
664
665 /**
666 * @tile_blob_ptr:
667 *
668 * DRM blob property data for the tile property (used mostly by DP MST).
669 * This is meant for screens which are driven through separate display
670 * pipelines represented by &drm_crtc, which might not be running with
671 * genlocked clocks. For tiled panels which are genlocked, like
672 * dual-link LVDS or dual-link DSI, the driver should try to not expose
673 * the tiling and virtualize both &drm_crtc and &drm_plane if needed.
674 */
675 struct drm_property_blob *tile_blob_ptr;
676
677/* should we poll this connector for connects and disconnects */
678/* hot plug detectable */
679#define DRM_CONNECTOR_POLL_HPD (1 << 0)
680/* poll for connections */
681#define DRM_CONNECTOR_POLL_CONNECT (1 << 1)
682/* can cleanly poll for disconnections without flickering the screen */
683/* DACs should rarely do this without a lot of testing */
684#define DRM_CONNECTOR_POLL_DISCONNECT (1 << 2)
685
686 /**
687 * @polled:
688 *
689 * Connector polling mode, a combination of
690 *
691 * DRM_CONNECTOR_POLL_HPD
692 * The connector generates hotplug events and doesn't need to be
693 * periodically polled. The CONNECT and DISCONNECT flags must not
694 * be set together with the HPD flag.
695 *
696 * DRM_CONNECTOR_POLL_CONNECT
697 * Periodically poll the connector for connection.
698 *
699 * DRM_CONNECTOR_POLL_DISCONNECT
700 * Periodically poll the connector for disconnection.
701 *
702 * Set to 0 for connectors that don't support connection status
703 * discovery.
704 */
705 uint8_t polled;
706
707 /* requested DPMS state */
708 int dpms;
709
710 const struct drm_connector_helper_funcs *helper_private;
711
712 /* forced on connector */
713 struct drm_cmdline_mode cmdline_mode;
714 enum drm_connector_force force;
715 bool override_edid;
716
717#define DRM_CONNECTOR_MAX_ENCODER 3
718 uint32_t encoder_ids[DRM_CONNECTOR_MAX_ENCODER];
719 struct drm_encoder *encoder; /* currently active encoder */
720
721#define MAX_ELD_BYTES 128
722 /* EDID bits */
723 uint8_t eld[MAX_ELD_BYTES];
724 bool latency_present[2];
725 int video_latency[2]; /* [0]: progressive, [1]: interlaced */
726 int audio_latency[2];
727 int null_edid_counter; /* needed to workaround some HW bugs where we get all 0s */
728 unsigned bad_edid_counter;
729
730 /* Flag for raw EDID header corruption - used in Displayport
731 * compliance testing - * Displayport Link CTS Core 1.2 rev1.1 4.2.2.6
732 */
733 bool edid_corrupt;
734
735 struct dentry *debugfs_entry;
736
737 struct drm_connector_state *state;
738
739 /* DisplayID bits */
740 bool has_tile;
741 struct drm_tile_group *tile_group;
742 bool tile_is_single_monitor;
743
744 uint8_t num_h_tile, num_v_tile;
745 uint8_t tile_h_loc, tile_v_loc;
746 uint16_t tile_h_size, tile_v_size;
747};
748
749#define obj_to_connector(x) container_of(x, struct drm_connector, base)
750
751int drm_connector_init(struct drm_device *dev,
752 struct drm_connector *connector,
753 const struct drm_connector_funcs *funcs,
754 int connector_type);
755int drm_connector_register(struct drm_connector *connector);
756void drm_connector_unregister(struct drm_connector *connector);
757int drm_mode_connector_attach_encoder(struct drm_connector *connector,
758 struct drm_encoder *encoder);
759
760void drm_connector_cleanup(struct drm_connector *connector);
761static inline unsigned drm_connector_index(struct drm_connector *connector)
762{
763 return connector->index;
764}
765
766/**
767 * drm_connector_lookup - lookup connector object
768 * @dev: DRM device
769 * @id: connector object id
770 *
771 * This function looks up the connector object specified by id
772 * add takes a reference to it.
773 */
774static inline struct drm_connector *drm_connector_lookup(struct drm_device *dev,
775 uint32_t id)
776{
777 struct drm_mode_object *mo;
778 mo = drm_mode_object_find(dev, id, DRM_MODE_OBJECT_CONNECTOR);
779 return mo ? obj_to_connector(mo) : NULL;
780}
781
782/**
783 * drm_connector_reference - incr the connector refcnt
784 * @connector: connector
785 *
786 * This function increments the connector's refcount.
787 */
788static inline void drm_connector_reference(struct drm_connector *connector)
789{
790 drm_mode_object_reference(&connector->base);
791}
792
793/**
794 * drm_connector_unreference - unref a connector
795 * @connector: connector to unref
796 *
797 * This function decrements the connector's refcount and frees it if it drops to zero.
798 */
799static inline void drm_connector_unreference(struct drm_connector *connector)
800{
801 drm_mode_object_unreference(&connector->base);
802}
803
804const char *drm_get_connector_status_name(enum drm_connector_status status);
805const char *drm_get_subpixel_order_name(enum subpixel_order order);
806const char *drm_get_dpms_name(int val);
807const char *drm_get_dvi_i_subconnector_name(int val);
808const char *drm_get_dvi_i_select_name(int val);
809const char *drm_get_tv_subconnector_name(int val);
810const char *drm_get_tv_select_name(int val);
811
812int drm_mode_create_dvi_i_properties(struct drm_device *dev);
813int drm_mode_create_tv_properties(struct drm_device *dev,
814 unsigned int num_modes,
815 const char * const modes[]);
816int drm_mode_create_scaling_mode_property(struct drm_device *dev);
817int drm_mode_create_aspect_ratio_property(struct drm_device *dev);
818int drm_mode_create_suggested_offset_properties(struct drm_device *dev);
819
820int drm_mode_connector_set_path_property(struct drm_connector *connector,
821 const char *path);
822int drm_mode_connector_set_tile_property(struct drm_connector *connector);
823int drm_mode_connector_update_edid_property(struct drm_connector *connector,
824 const struct edid *edid);
825
826/**
827 * struct drm_tile_group - Tile group metadata
828 * @refcount: reference count
829 * @dev: DRM device
830 * @id: tile group id exposed to userspace
831 * @group_data: Sink-private data identifying this group
832 *
833 * @group_data corresponds to displayid vend/prod/serial for external screens
834 * with an EDID.
835 */
836struct drm_tile_group {
837 struct kref refcount;
838 struct drm_device *dev;
839 int id;
840 u8 group_data[8];
841};
842
843struct drm_tile_group *drm_mode_create_tile_group(struct drm_device *dev,
844 char topology[8]);
845struct drm_tile_group *drm_mode_get_tile_group(struct drm_device *dev,
846 char topology[8]);
847void drm_mode_put_tile_group(struct drm_device *dev,
848 struct drm_tile_group *tg);
849
850/**
851 * drm_for_each_connector - iterate over all connectors
852 * @connector: the loop cursor
853 * @dev: the DRM device
854 *
855 * Iterate over all connectors of @dev.
856 */
857#define drm_for_each_connector(connector, dev) \
858 for (assert_drm_connector_list_read_locked(&(dev)->mode_config), \
859 connector = list_first_entry(&(dev)->mode_config.connector_list, \
860 struct drm_connector, head); \
861 &connector->head != (&(dev)->mode_config.connector_list); \
862 connector = list_next_entry(connector, head))
863
864#endif