Commit 215bed54 authored by Allen Li's avatar Allen Li Committed by Alex Deucher
Browse files

drm/amd/display: Read DPCD to obtain eDP capability information. 



[Why & How]
Extend to read eDP general capability 2 in detect_edp_sink_caps().

Reviewed-by: default avatarRobin Chen <robin.chen@amd.com>
Reviewed-by: default avatarWenjing Liu <wenjing.liu@amd.com>
Signed-off-by: default avatarAllen Li <wei-guang.li@amd.com>
Signed-off-by: default avatarWayne Lin <wayne.lin@amd.com>
Tested-by: default avatarDan Wheeler <daniel.wheeler@amd.com>
Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
parent 68f3c044

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

+1 −0
Original line number Diff line number Diff line
@@ -1284,6 +1284,7 @@ struct dpcd_caps { 
	union dp_receive_port0_cap receive_port0_cap;

	/* Indicates the number of SST links supported by MSO (Multi-Stream Output) */

	uint8_t mso_cap_sst_links_supported;

	uint8_t dp_edp_general_cap_2;

};



union dpcd_sink_ext_caps {

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

+6 −0
Original line number Diff line number Diff line
@@ -2195,6 +2195,12 @@ void detect_edp_sink_caps(struct dc_link *link) 
			DP_EDP_MSO_LINK_CAPABILITIES,

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

			sizeof(link->dpcd_caps.mso_cap_sst_links_supported));

	/*

	 * Read eDP general capability 2

	 */

	core_link_read_dpcd(link, DP_EDP_GENERAL_CAP_2,

			(uint8_t *)&link->dpcd_caps.dp_edp_general_cap_2,

			sizeof(link->dpcd_caps.dp_edp_general_cap_2));

}



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