drm/dp_mst: Retrieve extended DPCD caps for topology manager
As per DP-1.3, First check DP_EXTENDED_RECEIVER_CAP_FIELD_PRESENT. If DP_EXTENDED_RECEIVER_CAP_FIELD_PRESENT is 1,read the DP_DP13_DPCD_REV to get the faster capability. If DP_EXTENDED_RECEIVER_CAP_FIELD_PRESENT is 0,read DP_DPCD_REV. Signed-off-by:Koba Ko <koba.ko@canonical.com> Reviewed-by:
Lyude Paul <lyude@redhat.com> [added aux name to drm_dbg_kms() call] Signed-off-by:
Lyude Paul <lyude@redhat.com> Link: https://patchwork.freedesktop.org/patch/msgid/20200922065313.4794-1-koba.ko@canonical.com
parent
9572e669
Please register or sign in to comment