To power-down the entire full power domain, the PMC must suspend the APU when none of the FPD devices are in use. After this condition is met, the PMC can power-down the FPD automatically. The PMC powers down the FPD if no latency requirements constrain this action, otherwise the FPD remains powered on.
For information on powering down the FPD, refer to Suspend to RAM in Self-Suspending.