drm/amd/display: read DP sink and DP branch hardware and firmware revision from DPCD
- define new dpcd address in drm - implement new members in dpcd_caps to store values read from new dpcd address Signed-off-by:Alvin lee <alvin.lee3@amd.com> Reviewed-by:
Harry Wentland <Harry.Wentland@amd.com> Signed-off-by:
Alex Deucher <alexander.deucher@amd.com>
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