]> git.proxmox.com Git - mirror_ubuntu-bionic-kernel.git/blob - drivers/gpu/drm/amd/display/dc/dc.h
drm/amd/display: Switch to DRM helpers in s3.
[mirror_ubuntu-bionic-kernel.git] / drivers / gpu / drm / amd / display / dc / dc.h
1 /*
2 * Copyright 2012-14 Advanced Micro Devices, Inc.
3 *
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
10 *
11 * The above copyright notice and this permission notice shall be included in
12 * all copies or substantial portions of the Software.
13 *
14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
17 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
18 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
19 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
20 * OTHER DEALINGS IN THE SOFTWARE.
21 *
22 * Authors: AMD
23 *
24 */
25
26 #ifndef DC_INTERFACE_H_
27 #define DC_INTERFACE_H_
28
29 #include "dc_types.h"
30 #include "grph_object_defs.h"
31 #include "logger_types.h"
32 #include "gpio_types.h"
33 #include "link_service_types.h"
34
35 #define MAX_SURFACES 3
36 #define MAX_STREAMS 6
37 #define MAX_SINKS_PER_LINK 4
38
39 /*******************************************************************************
40 * Display Core Interfaces
41 ******************************************************************************/
42
43 struct dc_caps {
44 uint32_t max_streams;
45 uint32_t max_links;
46 uint32_t max_audios;
47 uint32_t max_slave_planes;
48 uint32_t max_downscale_ratio;
49 uint32_t i2c_speed_in_khz;
50
51 unsigned int max_cursor_size;
52 };
53
54
55 struct dc_dcc_surface_param {
56 enum surface_pixel_format format;
57 struct dc_size surface_size;
58 enum dc_scan_direction scan;
59 };
60
61 struct dc_dcc_setting {
62 unsigned int max_compressed_blk_size;
63 unsigned int max_uncompressed_blk_size;
64 bool independent_64b_blks;
65 };
66
67 struct dc_surface_dcc_cap {
68 bool capable;
69 bool const_color_support;
70
71 union {
72 struct {
73 struct dc_dcc_setting rgb;
74 } grph;
75
76 struct {
77 struct dc_dcc_setting luma;
78 struct dc_dcc_setting chroma;
79 } video;
80 };
81 };
82
83 /* Forward declaration*/
84 struct dc;
85 struct dc_surface;
86 struct validate_context;
87
88 struct dc_cap_funcs {
89 int i;
90 };
91
92 struct dc_stream_funcs {
93 bool (*adjust_vmin_vmax)(struct dc *dc,
94 const struct dc_stream **stream,
95 int num_streams,
96 int vmin,
97 int vmax);
98
99 void (*stream_update_scaling)(const struct dc *dc,
100 const struct dc_stream *dc_stream,
101 const struct rect *src,
102 const struct rect *dst);
103 bool (*set_gamut_remap)(struct dc *dc,
104 const struct dc_stream **stream, int num_streams);
105 bool (*set_psr_enable)(struct dc *dc, bool enable);
106 bool (*setup_psr)(struct dc *dc, const struct dc_stream *stream);
107 };
108
109 struct link_training_settings;
110
111 struct dc_link_funcs {
112 void (*set_drive_settings)(struct dc *dc,
113 struct link_training_settings *lt_settings,
114 const struct dc_link *link);
115 void (*perform_link_training)(struct dc *dc,
116 struct dc_link_settings *link_setting,
117 bool skip_video_pattern);
118 void (*set_preferred_link_settings)(struct dc *dc,
119 struct dc_link_settings *link_setting,
120 const struct dc_link *link);
121 void (*enable_hpd)(const struct dc_link *link);
122 void (*disable_hpd)(const struct dc_link *link);
123 void (*set_test_pattern)(
124 const struct dc_link *link,
125 enum dp_test_pattern test_pattern,
126 const struct link_training_settings *p_link_settings,
127 const unsigned char *p_custom_pattern,
128 unsigned int cust_pattern_size);
129 };
130
131 /* Structure to hold configuration flags set by dm at dc creation. */
132 struct dc_config {
133 bool gpu_vm_support;
134 bool disable_disp_pll_sharing;
135 };
136
137 struct dc_debug {
138 bool surface_visual_confirm;
139 bool max_disp_clk;
140 bool surface_trace;
141 bool timing_trace;
142 bool validation_trace;
143 bool disable_stutter;
144 bool disable_dcc;
145 bool disable_dfs_bypass;
146 bool disable_clock_gate;
147 bool disable_dmcu;
148 bool force_abm_enable;
149 };
150
151 struct dc {
152 struct dc_caps caps;
153 struct dc_cap_funcs cap_funcs;
154 struct dc_stream_funcs stream_funcs;
155 struct dc_link_funcs link_funcs;
156 struct dc_config config;
157 struct dc_debug debug;
158 };
159
160 struct dc_init_data {
161 struct hw_asic_id asic_id;
162 void *driver; /* ctx */
163 struct cgs_device *cgs_device;
164
165 int num_virtual_links;
166 /*
167 * If 'vbios_override' not NULL, it will be called instead
168 * of the real VBIOS. Intended use is Diagnostics on FPGA.
169 */
170 struct dc_bios *vbios_override;
171 enum dce_environment dce_environment;
172
173 struct dc_config flags;
174 };
175
176 struct dc *dc_create(const struct dc_init_data *init_params);
177
178 void dc_destroy(struct dc **dc);
179
180 /*******************************************************************************
181 * Surface Interfaces
182 ******************************************************************************/
183
184 enum {
185 TRANSFER_FUNC_POINTS = 1025
186 };
187
188 struct dc_hdr_static_metadata {
189 bool hdr_supported;
190 bool is_hdr;
191
192 /* display chromaticities and white point in units of 0.00001 */
193 unsigned int chromaticity_green_x;
194 unsigned int chromaticity_green_y;
195 unsigned int chromaticity_blue_x;
196 unsigned int chromaticity_blue_y;
197 unsigned int chromaticity_red_x;
198 unsigned int chromaticity_red_y;
199 unsigned int chromaticity_white_point_x;
200 unsigned int chromaticity_white_point_y;
201
202 uint32_t min_luminance;
203 uint32_t max_luminance;
204 uint32_t maximum_content_light_level;
205 uint32_t maximum_frame_average_light_level;
206 };
207
208 enum dc_transfer_func_type {
209 TF_TYPE_PREDEFINED,
210 TF_TYPE_DISTRIBUTED_POINTS,
211 TF_TYPE_BYPASS
212 };
213
214 struct dc_transfer_func_distributed_points {
215 struct fixed31_32 red[TRANSFER_FUNC_POINTS];
216 struct fixed31_32 green[TRANSFER_FUNC_POINTS];
217 struct fixed31_32 blue[TRANSFER_FUNC_POINTS];
218
219 uint16_t end_exponent;
220 uint16_t x_point_at_y1_red;
221 uint16_t x_point_at_y1_green;
222 uint16_t x_point_at_y1_blue;
223 };
224
225 enum dc_transfer_func_predefined {
226 TRANSFER_FUNCTION_SRGB,
227 TRANSFER_FUNCTION_BT709,
228 TRANSFER_FUNCTION_PQ,
229 TRANSFER_FUNCTION_LINEAR,
230 };
231
232 struct dc_transfer_func {
233 enum dc_transfer_func_type type;
234 enum dc_transfer_func_predefined tf;
235 struct dc_transfer_func_distributed_points tf_pts;
236 };
237
238 struct dc_surface {
239 bool visible;
240 bool flip_immediate;
241 struct dc_plane_address address;
242
243 struct scaling_taps scaling_quality;
244 struct rect src_rect;
245 struct rect dst_rect;
246 struct rect clip_rect;
247
248 union plane_size plane_size;
249 union dc_tiling_info tiling_info;
250 struct dc_plane_dcc_param dcc;
251 enum dc_color_space color_space;
252
253 enum surface_pixel_format format;
254 enum dc_rotation_angle rotation;
255 bool horizontal_mirror;
256 enum plane_stereo_format stereo_format;
257
258 struct dc_hdr_static_metadata hdr_static_ctx;
259
260 const struct dc_gamma *gamma_correction;
261 const struct dc_transfer_func *in_transfer_func;
262 };
263
264 struct dc_plane_info {
265 union plane_size plane_size;
266 union dc_tiling_info tiling_info;
267 struct dc_plane_dcc_param dcc;
268 enum surface_pixel_format format;
269 enum dc_rotation_angle rotation;
270 bool horizontal_mirror;
271 enum plane_stereo_format stereo_format;
272 enum dc_color_space color_space; /*todo: wrong place, fits in scaling info*/
273 bool visible;
274 };
275
276 struct dc_scaling_info {
277 struct rect src_rect;
278 struct rect dst_rect;
279 struct rect clip_rect;
280 struct scaling_taps scaling_quality;
281 };
282
283 struct dc_surface_update {
284 const struct dc_surface *surface;
285
286 /* isr safe update parameters. null means no updates */
287 struct dc_flip_addrs *flip_addr;
288 struct dc_plane_info *plane_info;
289 struct dc_scaling_info *scaling_info;
290 /* following updates require alloc/sleep/spin that is not isr safe,
291 * null means no updates
292 */
293 /* gamma TO BE REMOVED */
294 struct dc_gamma *gamma;
295 struct dc_hdr_static_metadata *hdr_static_metadata;
296 struct dc_transfer_func *in_transfer_func;
297 struct dc_transfer_func *out_transfer_func;
298
299
300 };
301 /*
302 * This structure is filled in by dc_surface_get_status and contains
303 * the last requested address and the currently active address so the called
304 * can determine if there are any outstanding flips
305 */
306 struct dc_surface_status {
307 struct dc_plane_address requested_address;
308 struct dc_plane_address current_address;
309 bool is_flip_pending;
310 };
311
312 /*
313 * Create a new surface with default parameters;
314 */
315 struct dc_surface *dc_create_surface(const struct dc *dc);
316 const struct dc_surface_status *dc_surface_get_status(
317 const struct dc_surface *dc_surface);
318
319 void dc_surface_retain(const struct dc_surface *dc_surface);
320 void dc_surface_release(const struct dc_surface *dc_surface);
321
322 void dc_gamma_retain(const struct dc_gamma *dc_gamma);
323 void dc_gamma_release(const struct dc_gamma **dc_gamma);
324 struct dc_gamma *dc_create_gamma(void);
325
326 void dc_transfer_func_retain(const struct dc_transfer_func *dc_tf);
327 void dc_transfer_func_release(const struct dc_transfer_func *dc_tf);
328 struct dc_transfer_func *dc_create_transfer_func(void);
329
330 /*
331 * This structure holds a surface address. There could be multiple addresses
332 * in cases such as Stereo 3D, Planar YUV, etc. Other per-flip attributes such
333 * as frame durations and DCC format can also be set.
334 */
335 struct dc_flip_addrs {
336 struct dc_plane_address address;
337 bool flip_immediate;
338 /* TODO: add flip duration for FreeSync */
339 };
340
341 /*
342 * Optimized flip address update function.
343 *
344 * After this call:
345 * Surface addresses and flip attributes are programmed.
346 * Surface flip occur at next configured time (h_sync or v_sync flip)
347 */
348 void dc_flip_surface_addrs(struct dc *dc,
349 const struct dc_surface *const surfaces[],
350 struct dc_flip_addrs flip_addrs[],
351 uint32_t count);
352
353 /*
354 * Set up surface attributes and associate to a stream
355 * The surfaces parameter is an absolute set of all surface active for the stream.
356 * If no surfaces are provided, the stream will be blanked; no memory read.
357 * Any flip related attribute changes must be done through this interface.
358 *
359 * After this call:
360 * Surfaces attributes are programmed and configured to be composed into stream.
361 * This does not trigger a flip. No surface address is programmed.
362 */
363
364 bool dc_commit_surfaces_to_stream(
365 struct dc *dc,
366 const struct dc_surface **dc_surfaces,
367 uint8_t surface_count,
368 const struct dc_stream *stream);
369
370 bool dc_pre_update_surfaces_to_stream(
371 struct dc *dc,
372 const struct dc_surface *const *new_surfaces,
373 uint8_t new_surface_count,
374 const struct dc_stream *stream);
375
376 bool dc_post_update_surfaces_to_stream(
377 struct dc *dc);
378
379 void dc_update_surfaces_for_stream(struct dc *dc, struct dc_surface_update *updates,
380 int surface_count, const struct dc_stream *stream);
381
382 enum surface_update_type {
383 UPDATE_TYPE_FAST, /* super fast, safe to execute in isr */
384 UPDATE_TYPE_MED, /* a lot of programming needed. may need to alloc */
385 UPDATE_TYPE_FULL, /* may need to shuffle resources */
386 };
387
388 /*******************************************************************************
389 * Stream Interfaces
390 ******************************************************************************/
391 struct dc_stream {
392 const struct dc_sink *sink;
393 struct dc_crtc_timing timing;
394
395 enum dc_color_space output_color_space;
396
397 struct rect src; /* composition area */
398 struct rect dst; /* stream addressable area */
399
400 struct audio_info audio_info;
401
402 bool ignore_msa_timing_param;
403
404 struct freesync_context freesync_ctx;
405
406 const struct dc_transfer_func *out_transfer_func;
407 struct colorspace_transform gamut_remap_matrix;
408 struct csc_transform csc_color_matrix;
409
410 /* TODO: dithering */
411 /* TODO: custom INFO packets */
412 /* TODO: ABM info (DMCU) */
413 /* TODO: PSR info */
414 /* TODO: CEA VIC */
415 };
416
417 /*
418 * Log the current stream state.
419 */
420 void dc_stream_log(
421 const struct dc_stream *stream,
422 struct dal_logger *dc_logger,
423 enum dc_log_type log_type);
424
425 uint8_t dc_get_current_stream_count(const struct dc *dc);
426 struct dc_stream *dc_get_stream_at_index(const struct dc *dc, uint8_t i);
427
428 /*
429 * Return the current frame counter.
430 */
431 uint32_t dc_stream_get_vblank_counter(const struct dc_stream *stream);
432
433 /* TODO: Return parsed values rather than direct register read
434 * This has a dependency on the caller (amdgpu_get_crtc_scanoutpos)
435 * being refactored properly to be dce-specific
436 */
437 uint32_t dc_stream_get_scanoutpos(
438 const struct dc_stream *stream, uint32_t *vbl, uint32_t *position);
439
440 /*
441 * Structure to store surface/stream associations for validation
442 */
443 struct dc_validation_set {
444 const struct dc_stream *stream;
445 const struct dc_surface *surfaces[MAX_SURFACES];
446 uint8_t surface_count;
447 };
448
449 /*
450 * This function takes a set of resources and checks that they are cofunctional.
451 *
452 * After this call:
453 * No hardware is programmed for call. Only validation is done.
454 */
455 bool dc_validate_resources(
456 const struct dc *dc,
457 const struct dc_validation_set set[],
458 uint8_t set_count);
459
460 /*
461 * This function takes a stream and checks if it is guaranteed to be supported.
462 * Guaranteed means that MAX_COFUNC similar streams are supported.
463 *
464 * After this call:
465 * No hardware is programmed for call. Only validation is done.
466 */
467
468 bool dc_validate_guaranteed(
469 const struct dc *dc,
470 const struct dc_stream *stream);
471
472 /*
473 * Set up streams and links associated to drive sinks
474 * The streams parameter is an absolute set of all active streams.
475 *
476 * After this call:
477 * Phy, Encoder, Timing Generator are programmed and enabled.
478 * New streams are enabled with blank stream; no memory read.
479 */
480 bool dc_commit_streams(
481 struct dc *dc,
482 const struct dc_stream *streams[],
483 uint8_t stream_count);
484
485 /**
486 * Create a new default stream for the requested sink
487 */
488 struct dc_stream *dc_create_stream_for_sink(const struct dc_sink *dc_sink);
489
490 void dc_stream_retain(const struct dc_stream *dc_stream);
491 void dc_stream_release(const struct dc_stream *dc_stream);
492
493 struct dc_stream_status {
494 int primary_otg_inst;
495 int surface_count;
496 const struct dc_surface *surfaces[MAX_SURFACE_NUM];
497
498 /*
499 * link this stream passes through
500 */
501 const struct dc_link *link;
502 };
503
504 const struct dc_stream_status *dc_stream_get_status(
505 const struct dc_stream *dc_stream);
506
507 enum surface_update_type dc_check_update_surfaces_for_stream(
508 struct dc *dc,
509 struct dc_surface_update *updates,
510 int surface_count,
511 const struct dc_stream_status *stream_status);
512
513 /*******************************************************************************
514 * Link Interfaces
515 ******************************************************************************/
516
517 /*
518 * A link contains one or more sinks and their connected status.
519 * The currently active signal type (HDMI, DP-SST, DP-MST) is also reported.
520 */
521 struct dc_link {
522 const struct dc_sink *remote_sinks[MAX_SINKS_PER_LINK];
523 unsigned int sink_count;
524 const struct dc_sink *local_sink;
525 unsigned int link_index;
526 enum dc_connection_type type;
527 enum signal_type connector_signal;
528 enum dc_irq_source irq_source_hpd;
529 enum dc_irq_source irq_source_hpd_rx;/* aka DP Short Pulse */
530 /* caps is the same as reported_link_cap. link_traing use
531 * reported_link_cap. Will clean up. TODO
532 */
533 struct dc_link_settings reported_link_cap;
534 struct dc_link_settings verified_link_cap;
535 struct dc_link_settings max_link_setting;
536 struct dc_link_settings cur_link_settings;
537 struct dc_lane_settings cur_lane_setting;
538
539 uint8_t ddc_hw_inst;
540 uint8_t link_enc_hw_inst;
541
542 struct psr_caps psr_caps;
543 bool test_pattern_enabled;
544 union compliance_test_state compliance_test_state;
545 };
546
547 struct dpcd_caps {
548 union dpcd_rev dpcd_rev;
549 union max_lane_count max_ln_count;
550 union max_down_spread max_down_spread;
551
552 /* dongle type (DP converter, CV smart dongle) */
553 enum display_dongle_type dongle_type;
554 /* Dongle's downstream count. */
555 union sink_count sink_count;
556 /* If dongle_type == DISPLAY_DONGLE_DP_HDMI_CONVERTER,
557 indicates 'Frame Sequential-to-lllFrame Pack' conversion capability.*/
558 bool is_dp_hdmi_s3d_converter;
559
560 bool allow_invalid_MSA_timing_param;
561 bool panel_mode_edp;
562 uint32_t sink_dev_id;
563 uint32_t branch_dev_id;
564 int8_t branch_dev_name[6];
565 int8_t branch_hw_revision;
566 };
567
568 struct dc_link_status {
569 struct dpcd_caps *dpcd_caps;
570 };
571
572 const struct dc_link_status *dc_link_get_status(const struct dc_link *dc_link);
573
574 /*
575 * Return an enumerated dc_link. dc_link order is constant and determined at
576 * boot time. They cannot be created or destroyed.
577 * Use dc_get_caps() to get number of links.
578 */
579 const struct dc_link *dc_get_link_at_index(const struct dc *dc, uint32_t link_index);
580
581 /* Return id of physical connector represented by a dc_link at link_index.*/
582 const struct graphics_object_id dc_get_link_id_at_index(
583 struct dc *dc, uint32_t link_index);
584
585 /* Set backlight level of an embedded panel (eDP, LVDS). */
586 bool dc_link_set_backlight_level(const struct dc_link *dc_link, uint32_t level,
587 uint32_t frame_ramp, const struct dc_stream *stream);
588
589 bool dc_link_set_psr_enable(const struct dc_link *dc_link, bool enable);
590
591 bool dc_link_setup_psr(const struct dc_link *dc_link,
592 const struct dc_stream *stream);
593
594 /* Request DC to detect if there is a Panel connected.
595 * boot - If this call is during initial boot.
596 * Return false for any type of detection failure or MST detection
597 * true otherwise. True meaning further action is required (status update
598 * and OS notification).
599 */
600 bool dc_link_detect(const struct dc_link *dc_link, bool boot);
601
602 /* Notify DC about DP RX Interrupt (aka Short Pulse Interrupt).
603 * Return:
604 * true - Downstream port status changed. DM should call DC to do the
605 * detection.
606 * false - no change in Downstream port status. No further action required
607 * from DM. */
608 bool dc_link_handle_hpd_rx_irq(const struct dc_link *dc_link);
609
610 struct dc_sink_init_data;
611
612 struct dc_sink *dc_link_add_remote_sink(
613 const struct dc_link *dc_link,
614 const uint8_t *edid,
615 int len,
616 struct dc_sink_init_data *init_data);
617
618 void dc_link_remove_remote_sink(
619 const struct dc_link *link,
620 const struct dc_sink *sink);
621
622 /* Used by diagnostics for virtual link at the moment */
623 void dc_link_set_sink(const struct dc_link *link, struct dc_sink *sink);
624
625 void dc_link_dp_set_drive_settings(
626 struct dc_link *link,
627 struct link_training_settings *lt_settings);
628
629 bool dc_link_dp_perform_link_training(
630 struct dc_link *link,
631 const struct dc_link_settings *link_setting,
632 bool skip_video_pattern);
633
634 void dc_link_dp_enable_hpd(const struct dc_link *link);
635
636 void dc_link_dp_disable_hpd(const struct dc_link *link);
637
638 bool dc_link_dp_set_test_pattern(
639 const struct dc_link *link,
640 enum dp_test_pattern test_pattern,
641 const struct link_training_settings *p_link_settings,
642 const unsigned char *p_custom_pattern,
643 unsigned int cust_pattern_size);
644
645 /*******************************************************************************
646 * Sink Interfaces - A sink corresponds to a display output device
647 ******************************************************************************/
648
649 /*
650 * The sink structure contains EDID and other display device properties
651 */
652 struct dc_sink {
653 enum signal_type sink_signal;
654 struct dc_edid dc_edid; /* raw edid */
655 struct dc_edid_caps edid_caps; /* parse display caps */
656 };
657
658 void dc_sink_retain(const struct dc_sink *sink);
659 void dc_sink_release(const struct dc_sink *sink);
660
661 const struct audio **dc_get_audios(struct dc *dc);
662
663 struct dc_sink_init_data {
664 enum signal_type sink_signal;
665 const struct dc_link *link;
666 uint32_t dongle_max_pix_clk;
667 bool converter_disable_audio;
668 };
669
670 struct dc_sink *dc_sink_create(const struct dc_sink_init_data *init_params);
671
672 /*******************************************************************************
673 * Cursor interfaces - To manages the cursor within a stream
674 ******************************************************************************/
675 /* TODO: Deprecated once we switch to dc_set_cursor_position */
676 bool dc_stream_set_cursor_attributes(
677 const struct dc_stream *stream,
678 const struct dc_cursor_attributes *attributes);
679
680 bool dc_stream_set_cursor_position(
681 const struct dc_stream *stream,
682 const struct dc_cursor_position *position);
683
684 /* Newer interfaces */
685 struct dc_cursor {
686 struct dc_plane_address address;
687 struct dc_cursor_attributes attributes;
688 };
689
690 /*******************************************************************************
691 * Interrupt interfaces
692 ******************************************************************************/
693 enum dc_irq_source dc_interrupt_to_irq_source(
694 struct dc *dc,
695 uint32_t src_id,
696 uint32_t ext_id);
697 void dc_interrupt_set(const struct dc *dc, enum dc_irq_source src, bool enable);
698 void dc_interrupt_ack(struct dc *dc, enum dc_irq_source src);
699 enum dc_irq_source dc_get_hpd_irq_source_at_index(
700 struct dc *dc, uint32_t link_index);
701
702 /*******************************************************************************
703 * Power Interfaces
704 ******************************************************************************/
705
706 void dc_set_power_state(
707 struct dc *dc,
708 enum dc_acpi_cm_power_state power_state);
709 void dc_resume(const struct dc *dc);
710
711 /*******************************************************************************
712 * DDC Interfaces
713 ******************************************************************************/
714
715 const struct ddc_service *dc_get_ddc_at_index(
716 struct dc *dc, uint32_t link_index);
717
718 /*
719 * DPCD access interfaces
720 */
721
722 bool dc_read_dpcd(
723 struct dc *dc,
724 uint32_t link_index,
725 uint32_t address,
726 uint8_t *data,
727 uint32_t size);
728
729 bool dc_write_dpcd(
730 struct dc *dc,
731 uint32_t link_index,
732 uint32_t address,
733 const uint8_t *data,
734 uint32_t size);
735
736 bool dc_query_ddc_data(
737 struct dc *dc,
738 uint32_t link_index,
739 uint32_t address,
740 uint8_t *write_buf,
741 uint32_t write_size,
742 uint8_t *read_buf,
743 uint32_t read_size);
744
745 bool dc_submit_i2c(
746 struct dc *dc,
747 uint32_t link_index,
748 struct i2c_command *cmd);
749
750
751 #endif /* DC_INTERFACE_H_ */