drm/amdgpu: implement vcn start RB command

Signed-off-by: Leo Liu <leo.liu@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Leo Liu 2017-02-07 11:52:00 -05:00 • committed by Alex Deucher
commit e7501c34aa