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Tom St Denis authored
This adds a mutex lock for both DPM/PP around the changes in power gating state so that userspace can poll registers without a race condition on power state. Signed-off-by: Tom St Denis <tom.stdenis@amd.com> Reviewed-by: Rex Zhu <Rex.Zhu@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
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