github-mirror/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux.git synced 2026-06-01 02:53:36 +02:00
Code Issues Actions Packages Projects Releases Wiki Activity Graph

drm/amd/display: read mso dpcd caps

Browse Source 
[Why & How]
Read if panel support multi-sst links

Reviewed-by: Charlene Liu <charlene.liu@amd.com>
Signed-off-by: Hansen Dsouza <Hansen.Dsouza@amd.com>
Signed-off-by: Wayne Lin <wayne.lin@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Hansen Dsouza 2025-01-24 15:12:37 -05:00 committed by Alex Deucher
parent 0dfcc2bf26
commit fc215e83d0
2 changed files with 13 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/gpu/drm/amd/display/dc/dc_dp_types.h
View File

@ -1220,6 +1220,8 @@ struct dpcd_caps {
struct replay_info pr_info;
uint16_t edp_oled_emission_rate;
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;
};
union dpcd_sink_ext_caps {

11
drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_capability.c
View File

@ -2100,6 +2100,17 @@ void detect_edp_sink_caps(struct dc_link *link)
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));
/*
* Read Multi-SST (Single Stream Transport) capability
* for eDP version 1.4 or higher.
*/
if (link->dpcd_caps.dpcd_rev.raw >= DP_EDP_14)
core_link_read_dpcd(
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));
}
bool dp_get_max_link_enc_cap(const struct dc_link *link, struct dc_link_settings *max_link_enc_cap)