[alsa-devel] [RFC PATCH 1/1] ALSA: hda - add a timer to find and suspend idle codecs

Lin, Mengdong mengdong.lin at intel.com
Tue Aug 14 15:42:36 CEST 2012

> Adding timers means are you adding wakeups to the CPU. That seems
> counterproductive if you're trying to save power...?
> Is there no way to listen to a change event of some sort instead?

The module parameter "power_save" is used to enable/disable the power saving and set a timeout.
But when its value changes, the driver cannot get a notification.

I hope to reserve the sysfs interface, so I choose to poll the value at a relative long interval.


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