Mohan Kumar 50217466ed ASoC: tegra-alt: Avoid reg access after shutdown ...

Below are the hypothetical scenarios
- Drivers are in suspend state while reboot and PCM Open call from
  userspace is received after driver shutdown [APE is power gated
  already]
- PM domain handling doesn't ensure proper functionality after driver
  shutdown is called

The change handles with the below fix
- ALSA PCM Open API first executes runtime resume of each driver.
  So need to prevent any reg access in runtime resume of drivers.
- ALSA PCM Open executes ADMAIF startup after runtime resume of
  each driver. If ADMAIF startup returns failure based on shutdown,
  PCM Open operation will fail, this will break PCM Open path and
  will ensure no further ALSA APIs/Callbacks are called.

Bug 200289815

Change-Id: Ia03e035569375f37ae4b0faa1a4593ce121d2354
Signed-off-by: Mohan Kumar <mkumard@nvidia.com>
Reviewed-on: http://git-master/r/1475208
(cherry picked from commit 3361e95850563f3009a428bb1c01941ed069a7b0)
Reviewed-on: http://git-master/r/1492664
Reviewed-by: svccoveritychecker <svccoveritychecker@nvidia.com>
Reviewed-by: Automatic_Commit_Validation_User
GVS: Gerrit_Virtual_Submit
Reviewed-by: Dipesh Gandhi <dipeshg@nvidia.com>
Reviewed-by: Ravindra Lokhande <rlokhande@nvidia.com>

2022-09-29 15:30:21 +05:30

..

soc

ASoC: tegra-alt: Avoid reg access after shutdown

2022-09-29 15:30:21 +05:30