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

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

Reviewed-by: Robin Chen <robin.chen@amd.com>
Reviewed-by: Wenjing Liu <wenjing.liu@amd.com>
Signed-off-by: Allen Li <wei-guang.li@amd.com>
Signed-off-by: Wayne Lin <wayne.lin@amd.com>
Tested-by: Dan Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Allen Li 2025-08-25 14:23:14 +08:00 committed by Alex Deucher
parent 68f3c044f3
commit 215bed5489
2 changed files with 7 additions and 0 deletions
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1
drivers/gpu/drm/amd/display/dc/dc_dp_types.h
View File

@ -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 {

6
drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_capability.c
View File

@ -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)