From: Ben Gardiner <bengardiner@nanometrics.ca>
Date: Tue, 24 May 2011 18:50:18 +0000 (-0400)
Subject: ASoC: davinci-pcm: fix audible glitch on 2nd ping-pong playback
X-Git-Tag: v3.1-rc1~271^2~2^2~133
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=ef39eb6f212996ede8da47ef45e6dffff1121ec7;p=pandora-kernel.git

ASoC: davinci-pcm: fix audible glitch on 2nd ping-pong playback

The release of the dma channels was being performed in prepare and there was a
edma_resume call for the asp-channel only being executed on START, RESUME and
PAUSE_RELEASE.

The mcasp on da850evm with ping-pong buffers enabled was exhibiting an audible
glitch on every playback after the first. It was determined through trial and
error that the following two changes fix this problem:

1) Move the edma_start calls from prepare to trigger and 2) reverse the order
of starting the asp and ram channels.

Signed-off-by: Ben Gardiner <bengardiner@nanometrics.ca>
Reviewed-by: Steven Faludi <stevenfaludi@nanometrics.ca>
Acked-by: Liam Girdwood <lrg@ti.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
---

Reading git-diff-tree failed