linux-kernel - Re: [PATCH 1/1] dma: imx-sdma: buf_tail should be initialize in prepare function

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Message-ID: <20120524033356.GC17621@S2101-09.ap.freescale.net>
Date:	Thu, 24 May 2012 11:33:58 +0800
From:	Shawn Guo <shawn.guo@...aro.org>
To:	Richard Zhao <richard.zhao@...escale.com>
Cc:	linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	vinod.koul@...el.com, dan.j.williams@...el.com, linuxzsc@...il.com,
	shawn.guo@...il.com, kernel@...gutronix.de
Subject: Re: [PATCH 1/1] dma: imx-sdma: buf_tail should be initialize in
 prepare function

On Thu, May 24, 2012 at 11:27:00AM +0800, Richard Zhao wrote:
> > root@...aro-developer:~# aplay audio8k16S.wav
> > Playing WAVE 'audio8k16S.wav' : Signed 16 bit Little Endian, Rate 8000 Hz, Stere
> > o
> > ^Z
> > [1]+  Stopped                 aplay audio8k16S.wav
> > root@...aro-developer:~# fg
> > aplay audio8k16S.wav
> > underrun!!! (at least 2034.382 ms long)
> Does the audio playback recover? Without the patch, sometimes the
> playback will have distortion and play too fast.
> 
No, it does not recover.

-- 
Regards,
Shawn
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