From: Iswara Nagulendran <inagulen@xxxxxxx> [WHY] Screen was seen corrupted for a few ms when switching both ways. There was also not enough bandwidth for HDR to be enabled in HG disabled mode. This was due to FEC being enabled although DSC was not supported or disabled for the EDP. [HOW] Check for EDP DSC support in DC caps or if DSC should be disabled for EDP before enabling FEC for EDP. Reviewed-by: Harry Vanzylldejong <USER DID NOT SET AN EMAIL> Reviewed-by: Evgenii Krasnikov <Evgenii.Krasnikov@xxxxxxx> Reviewed-by: Nicholas Choi <Nicholas.Choi@xxxxxxx> Acked-by: Pavle Kotarac <Pavle.Kotarac@xxxxxxx> Signed-off-by: Iswara Nagulendran <inagulen@xxxxxxx> --- drivers/gpu/drm/amd/display/dc/core/dc_link.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_link.c b/drivers/gpu/drm/amd/display/dc/core/dc_link.c index 22f2d88fab99..c1a727ff8b1d 100644 --- a/drivers/gpu/drm/amd/display/dc/core/dc_link.c +++ b/drivers/gpu/drm/amd/display/dc/core/dc_link.c @@ -4663,8 +4663,10 @@ bool dc_link_should_enable_fec(const struct dc_link *link) link->local_sink->edid_caps.panel_patch.disable_fec) force_disable = true; else if (link->connector_signal == SIGNAL_TYPE_EDP - && link->dpcd_caps.dsc_caps.dsc_basic_caps.fields. - dsc_support.DSC_SUPPORT == false) + && (link->dpcd_caps.dsc_caps.dsc_basic_caps.fields. + dsc_support.DSC_SUPPORT == false + || link->dc->debug.disable_dsc_edp + || !link->dc->caps.edp_dsc_support)) force_disable = true; return !force_disable && dc_link_is_fec_supported(link); -- 2.32.0
