diff options
| author | Hansen Dsouza <Hansen.Dsouza@amd.com> | 2025-01-24 15:12:37 -0500 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2025-03-05 10:39:16 -0500 |
| commit | fc215e83d0480e8af58fd8ad2282c3c319ebcf4e (patch) | |
| tree | 88d99156cff5dad033bd47232c780edc838efbca | |
| parent | 0dfcc2bf269010a6e093793034c048049a40ee93 (diff) | |
drm/amd/display: read mso dpcd caps
[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>
| -rw-r--r-- | drivers/gpu/drm/amd/display/dc/dc_dp_types.h | 2 | ||||
| -rw-r--r-- | drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_capability.c | 11 |
2 files changed, 13 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/display/dc/dc_dp_types.h b/drivers/gpu/drm/amd/display/dc/dc_dp_types.h index 8bb628ab7855..22c2173c687f 100644 --- a/drivers/gpu/drm/amd/display/dc/dc_dp_types.h +++ b/drivers/gpu/drm/amd/display/dc/dc_dp_types.h @@ -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 { diff --git a/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_capability.c b/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_capability.c index 0785c030f6a6..da19f6a3b42b 100644 --- a/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_capability.c +++ b/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_capability.c @@ -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) |