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a667386cb9
Set a configurable SDMA phase quantum when enabling SDMA context switching. The default value significantly reduces SDMA latency in page table updates when user-mode SDMA queues have concurrent activity, compared to the initial HW setting. Signed-off-by: Felix Kuehling <Felix.Kuehling@amd.com> Reviewed-by: Andres Rodriguez <andres.rodriguez@amd.com> Reviewed-by: Shaoyun Liu <shaoyun.liu@amd.com> Acked-by: Chunming Zhou <david1.zhou@amd.com> Acked-by: Alex Deucher <alexander.deucher@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>