From: Mark Brown <broonie@opensource.wolfsonmicro.com>
Date: Tue, 4 Oct 2011 21:15:59 +0000 (+0100)
Subject: ASoC: Only run power_check() on a widget once per run
X-Git-Tag: v3.2-rc1~127^2~1^2~143
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=9b8a83b205bd07b06784028effd94515fe9278c3;p=pandora-kernel.git

ASoC: Only run power_check() on a widget once per run

Some widgets will get power_check() run on them more than once during a
DAPM run, most commonly due to supply widgets checking to see if their
consumers are powered up. It's wasteful to do this so cache the result
of power_check() during a run. For one system I tested this on I got an
improvement of:

           Power    Path   Neighbour
Before:    106      970    1186
After:     69       727    905

from this.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
---

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