diff options
| author | David Zhang <[email protected]> | 2022-04-11 16:04:39 -0400 |
|---|---|---|
| committer | Alex Deucher <[email protected]> | 2022-04-25 17:10:43 -0400 |
| commit | d9f442e9a20c20333ef9b2341d7c74c9783d30b4 (patch) | |
| tree | 86deb96794c8b8201a520392be8ee256c27fd6bb | |
| parent | 4a0caac06a4c587e56d89bd2fabfc0d33eb4fcb9 (diff) | |
drm/amd/display: read PSR-SU cap DPCD for specific panel
[why & how]
For some specific eDP panel, we'd check the PSR-SU cap during boot
by reading the vendor specific DPCD, otherwise it will cause to
false report the eDP panel which supports PSR-SU as an non-PSR-SU
panel.
- add the vendor specific DPCD address in ddc_service_types header
- if specific eDP panel detected, check vendor specific DPCD for
PSR-SU cap
Reviewed-by: Aurabindo Jayamohanan Pillai <[email protected]>
Acked-by: Tom Chung <[email protected]>
Signed-off-by: David Zhang <[email protected]>
Tested-by: Daniel Wheeler <[email protected]>
Signed-off-by: Alex Deucher <[email protected]>
| -rw-r--r-- | drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c | 4 | ||||
| -rw-r--r-- | drivers/gpu/drm/amd/display/include/ddc_service_types.h | 2 |
2 files changed, 6 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c b/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c index c5f5d25035d2..10f990eefe7d 100644 --- a/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c +++ b/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c @@ -5822,6 +5822,10 @@ void detect_edp_sink_caps(struct dc_link *link) core_link_read_dpcd(link, DP_PSR_SUPPORT, &link->dpcd_caps.psr_info.psr_version, sizeof(link->dpcd_caps.psr_info.psr_version)); + if (link->dpcd_caps.sink_dev_id == DP_BRANCH_DEVICE_ID_001CF8) + core_link_read_dpcd(link, DP_FORCE_PSRSU_CAPABILITY, + &link->dpcd_caps.psr_info.force_psrsu_cap, + sizeof(link->dpcd_caps.psr_info.force_psrsu_cap)); core_link_read_dpcd(link, DP_PSR_CAPS, &link->dpcd_caps.psr_info.psr_dpcd_caps.raw, sizeof(link->dpcd_caps.psr_info.psr_dpcd_caps.raw)); diff --git a/drivers/gpu/drm/amd/display/include/ddc_service_types.h b/drivers/gpu/drm/amd/display/include/ddc_service_types.h index f883d87791fe..73b9e0a87e54 100644 --- a/drivers/gpu/drm/amd/display/include/ddc_service_types.h +++ b/drivers/gpu/drm/amd/display/include/ddc_service_types.h @@ -39,6 +39,8 @@ #define DP_BRANCH_HW_REV_20 0x20 #define DP_DEVICE_ID_38EC11 0x38EC11 +#define DP_FORCE_PSRSU_CAPABILITY 0x40F + enum ddc_result { DDC_RESULT_UNKNOWN = 0, DDC_RESULT_SUCESSFULL, |