pipeline_pm_power
ret = pipeline_pm_power(entity, change, &mdev->pm_count_walk);
pipeline_pm_power(source, -sink_use, graph);
pipeline_pm_power(sink, -source_use, graph);
ret = pipeline_pm_power(source, sink_use, graph);
ret = pipeline_pm_power(sink, source_use, graph);
pipeline_pm_power(source, -sink_use, graph);