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

Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git

kernel os linux

[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>

authored by

Allen Li and committed by

Alex Deucher 9 months ago 215bed54 68f3c044

2 changed files

expand all

drivers

gpu

drm

amd

display

dc_dp_types.h

link

protocols

link_dp_capability.c

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

··· 1284 1284 union dp_receive_port0_cap receive_port0_cap; 1285 1285 /* Indicates the number of SST links supported by MSO (Multi-Stream Output) */ 1286 1286 uint8_t mso_cap_sst_links_supported; 1287 + uint8_t dp_edp_general_cap_2; 1287 1288 }; 1288 1289 1289 1290 union dpcd_sink_ext_caps {

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

··· 2195 2195 DP_EDP_MSO_LINK_CAPABILITIES, 2196 2196 (uint8_t *)&link->dpcd_caps.mso_cap_sst_links_supported, 2197 2197 sizeof(link->dpcd_caps.mso_cap_sst_links_supported)); 2198 + /* 2199 + * Read eDP general capability 2 2200 + */ 2201 + core_link_read_dpcd(link, DP_EDP_GENERAL_CAP_2, 2202 + (uint8_t *)&link->dpcd_caps.dp_edp_general_cap_2, 2203 + sizeof(link->dpcd_caps.dp_edp_general_cap_2)); 2198 2204 } 2199 2205 2200 2206 bool dp_get_max_link_enc_cap(const struct dc_link *link, struct dc_link_settings *max_link_enc_cap)

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