** Changed in: hwe-next
       Status: New => Fix Released

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  Allow Raven Ridge's audio controller to be runtime suspended

Status in HWE Next:
  Fix Released
Status in linux package in Ubuntu:
  Fix Released
Status in linux source package in Bionic:
  Fix Released

Bug description:
  ===SRU Justification===
  AMD Raven Ridge's audio controller doesn't get runtime suspended. It consumes 
unnecessary power.

  With the patch, it can get runtime suspended and save ~1W for the system.
  It can also get runtime resumed correctly when doing audio input/output.

  Add AZX_DCAPS_PM_RUNTIME flag to let sound subsystem know it supports runtime 

  [Regression Potential]
  Low. This change limits to Raven Ridge's audio controller.

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