Add ring write/read pointer check for VCN dynamic power gate mode
stop,to make sure that no job is left in ring before turn off DPG mode.
Signed-off-by: NJames Zhu <James.Zhu@amd.com>
Acked-by: NLeo Liu <leo.liu@amd.com>
Acked-by: NAlex Deucher <alexander.deucher@amd.com>
Signed-off-by: NAlex Deucher <alexander.deucher@amd.com>