[mirror_ubuntu-bionic-kernel.git] / drivers / gpu / drm / amd / display / dc / inc / dc_link_dp.h

/*
 * Copyright 2015 Advanced Micro Devices, Inc.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
 * OTHER DEALINGS IN THE SOFTWARE.
 *
 * Authors: AMD
 *
 */

#ifndef __DC_LINK_DP_H__
#define __DC_LINK_DP_H__

#define LINK_TRAINING_ATTEMPTS 4
#define LINK_TRAINING_RETRY_DELAY 50 /* ms */

struct dc_link;
struct dc_stream_state;
struct dc_link_settings;

bool dp_hbr_verify_link_cap(
	struct dc_link *link,
	struct dc_link_settings *known_limit_link_setting);

bool decide_fallback_link_setting(struct dc_link_settings link_setting_init,
		struct dc_link_settings *link_setting_current,
		enum link_training_result training_result);

struct dc_link_settings get_common_supported_link_settings (
		struct dc_link_settings link_setting_a,
		struct dc_link_settings link_setting_b);

bool dp_validate_mode_timing(
	struct dc_link *link,
	const struct dc_crtc_timing *timing);

void decide_link_settings(
	struct dc_stream_state *stream,
	struct dc_link_settings *link_setting);

bool perform_link_training_with_retries(
	struct dc_link *link,
	const struct dc_link_settings *link_setting,
	bool skip_video_pattern,
	int attempts);

bool is_mst_supported(struct dc_link *link);

void detect_dp_sink_caps(struct dc_link *link);

void detect_edp_sink_caps(struct dc_link *link);

bool is_dp_active_dongle(const struct dc_link *link);

void dp_enable_mst_on_sink(struct dc_link *link, bool enable);

#endif /* __DC_LINK_DP_H__ */
Commit	Line	Data
4562236b HW	1	/*
	2	* Copyright 2015 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_LINK_DP_H__
	27	#define __DC_LINK_DP_H__
	28
	29	#define LINK_TRAINING_ATTEMPTS 4
	30	#define LINK_TRAINING_RETRY_DELAY 50 /* ms */
	31
d0778ebf	32	struct dc_link;
0971c40e	33	struct dc_stream_state;
4562236b HW	34	struct dc_link_settings;
	35
	36	bool dp_hbr_verify_link_cap(
d0778ebf	37	struct dc_link *link,
4562236b HW	38	struct dc_link_settings *known_limit_link_setting);
4562236b HW	39
820e3935 DW	40	bool decide_fallback_link_setting(struct dc_link_settings link_setting_init,
	41	struct dc_link_settings *link_setting_current,
	42	enum link_training_result training_result);
	43
	44	struct dc_link_settings get_common_supported_link_settings (
	45	struct dc_link_settings link_setting_a,
	46	struct dc_link_settings link_setting_b);
	47
4562236b	48	bool dp_validate_mode_timing(
d0778ebf	49	struct dc_link *link,
4562236b HW	50	const struct dc_crtc_timing *timing);
	51
	52	void decide_link_settings(
0971c40e	53	struct dc_stream_state *stream,
4562236b HW	54	struct dc_link_settings *link_setting);
	55
	56	bool perform_link_training_with_retries(
d0778ebf	57	struct dc_link *link,
4562236b HW	58	const struct dc_link_settings *link_setting,
	59	bool skip_video_pattern,
	60	int attempts);
	61
d0778ebf	62	bool is_mst_supported(struct dc_link *link);
4562236b	63
d0778ebf	64	void detect_dp_sink_caps(struct dc_link *link);
4562236b	65
4654a2f7 RL	66	void detect_edp_sink_caps(struct dc_link *link);
4654a2f7 RL	67
d0778ebf	68	bool is_dp_active_dongle(const struct dc_link *link);
4562236b	69
d0778ebf	70	void dp_enable_mst_on_sink(struct dc_link *link, bool enable);
07c84c7a	71
4562236b	72	#endif /* __DC_LINK_DP_H__ */