Commit 668d6808 authored by Robin Chen's avatar Robin Chen Committed by Alex Deucher
Browse files

drm/amd/display: Read Sink emission rate capability 



[WHY]
To get sink emission rate information for future
supported refresh rate calculation.

Reviewed-by: default avatarChunTao Tso <chuntao.tso@amd.com>
Signed-off-by: default avatarRobin Chen <robin.chen@amd.com>
Signed-off-by: default avatarRoman Li <roman.li@amd.com>
Tested-by: default avatarDaniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
parent ad6b76cd

drivers/gpu/drm/amd/display/dc/dc_dp_types.h

+2 −1
Original line number Diff line number Diff line
@@ -1192,6 +1192,7 @@ struct dpcd_caps { 
	struct edp_psr_info psr_info;



	struct replay_info pr_info;

	uint16_t edp_oled_emission_rate;

};



union dpcd_sink_ext_caps {
@@ -1205,7 +1206,7 @@ union dpcd_sink_ext_caps { 
		uint8_t oled : 1;

		uint8_t reserved_2 : 1;

		uint8_t miniled : 1;

		uint8_t reserved : 1;

		uint8_t emission_output : 1;

	} bits;

	uint8_t raw;

};

drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_capability.c

+8 −0
Original line number Diff line number Diff line
@@ -2067,6 +2067,14 @@ void detect_edp_sink_caps(struct dc_link *link) 
	core_link_read_dpcd(link, DP_SINK_PR_MAX_NUMBER_OF_DEVIATION_LINE,

			&link->dpcd_caps.pr_info.max_deviation_line,

			sizeof(link->dpcd_caps.pr_info.max_deviation_line));



	/*

	 * OLED Emission Rate info

	 */

	if (link->dpcd_sink_ext_caps.bits.emission_output)

		core_link_read_dpcd(link, DP_SINK_EMISSION_RATE,

				(uint8_t *)&link->dpcd_caps.edp_oled_emission_rate,

				sizeof(link->dpcd_caps.edp_oled_emission_rate));

}



bool dp_get_max_link_enc_cap(const struct dc_link *link, struct dc_link_settings *max_link_enc_cap)

drivers/gpu/drm/amd/display/include/dpcd_defs.h

+10 −9
Original line number Diff line number Diff line
@@ -164,7 +164,7 @@ enum dpcd_psr_sink_states { 
	PSR_SINK_STATE_SINK_INTERNAL_ERROR = 7,

};



#define DP_SOURCE_SEQUENCE    		    0x30c

#define DP_SOURCE_SEQUENCE                      0x30C

#define DP_SOURCE_TABLE_REVISION                0x310

#define DP_SOURCE_PAYLOAD_SIZE                  0x311

#define DP_SOURCE_SINK_CAP                      0x317
@@ -176,6 +176,7 @@ enum dpcd_psr_sink_states { 
#define DP_SINK_PR_REPLAY_STATUS                0x378

#define DP_SINK_PR_PIXEL_DEVIATION_PER_LINE     0x379

#define DP_SINK_PR_MAX_NUMBER_OF_DEVIATION_LINE 0x37A

#define DP_SINK_EMISSION_RATE                   0x37E



/* Remove once drm_dp_helper.h is updated upstream */

#ifndef DP_TOTAL_LTTPR_CNT