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

[Jaroslav Kysela]

Date 14.8.2012 19:56, mengdong.lin at intel.com wrote:
> From: Mengdong Lin <mengdong.lin at intel.com>
> 
> (sorry, this patch is resent with title updated)
> 
> 
> This patch sets up a timer to monitor changes of the parameter 'power_save'
> and suspend any idle codecs if power save is re-enabled by the user.
> 
> A codec won't be suspended if it becomes idle when power save is disabled. And it
> will remain unsuspended if power save is enabled later but no further user
> operations comes. So a timer is used here to find and suspend such idle codecs
> when power save is re-enabled.
> 
> Now the timer has a fixed interval of 1 second.

I would prefer to create a sysfs file to track the writes rather than
using this timer hack.

					Jaroslav

-- 
Jaroslav Kysela <perex at perex.cz>
Linux Kernel Sound Maintainer
ALSA Project; Red Hat, Inc.