[PATCH] drm/drm_mst: Use Extended Base Receiver Capability DPCD space

[why] DP 1.4a spec madates that if DP_EXTENDED_RECEIVER_CAP_FIELD_PRESENT is set, Extended Base Receiver Capability DPCD space must be used. Without doing that, the three DPCD values that differ will be wrong, leading to incorrect or limited functionality. MST link rate, for example, could have a l

[PATCH] drm/drm_mst: Use Extended Base Receiver Capability DPCD space

[why] DP 1.4a spec madates that if DP_EXTENDED_RECEIVER_CAP_FIELD_PRESENT is set, Extended Base Receiver Capability DPCD space must be used. Without doing that, the three DPCD values that differ will be wrong, leading to incorrect or limited functionality. MST link rate, for example, could have a l

RE: [PATCH] drm/drm_mst: Use Extended Base Receiver Capability DPCD space

riginal Message- From: Cornij, Nikola Sent: Tuesday, April 27, 2021 5:29 PM To: amd-gfx@lists.freedesktop.org Cc: Pillai, Aurabindo ; Lipski, Mikita ; ly...@redhat.com; ville.syrj...@linux.intel.com; koba...@canonical.com; intel-...@lists.freedesktop.org; Cornij, Nikola Subject: [PATCH]

[PATCH] drm/drm_mst: Use Extended Base Receiver Capability DPCD space

[why] DP 1.4a spec madates that if DP_EXTENDED_RECEIVER_CAP_FIELD_PRESENT is set, Extended Base Receiver Capability DPCD space must be used. Without doing that, the three DPCD values that differ will be wrong, leading to incorrect or limited functionality. MST link rate, for example, could have a l