From: J.Lambrecht@TELEVIC•com (Lambrecht Jürgen)
To: linux-arm-kernel@lists•infradead.org
Subject: [RFC PATCH] ARM ASoC: add sound driver for imx27pdk using mc13783 codec
Date: Fri, 8 Jul 2011 16:19:22 +0200 [thread overview]
Message-ID: <4E1711EA.5070209@televic.com> (raw)
In-Reply-To: <201107081611.25998.philippe.retornaz@epfl.ch>
On 07/08/2011 04:11 PM, Philippe R?tornaz wrote:
>
> Le vendredi 8 juillet 2011 15:24:51, J?rgen Lambrecht a ?crit :
> > - Started from sound/soc/imx/phycore-mc13783.c
> > - Renamed to general "imx" because also valid for imx27pdk (3ds) and
> other
> > 3ds platforms. Or should there be a file per platform?
>
> It's also valid on the mx31moboard platforms. So I guess it make sens
> to have
> a general name.
>
ok
>
> > - Fixed some issues (add names, add read/write functions, changed
> > late_initcall to module_init, configure clock input pin) - Add debug
> > printing and comments.
> > - Result:
> > * soundcard detection;
> > * after creating /dev entries, aplay runs;
> > * both 'aplay song.wav' and 'madplay song.mp3' give the same error:
> > a time-out waiting for DMA (ALSA pcm_lib.c:1802: playback write
> error
> > (DMA or IRQ trouble?)) * this driver uses the DMA method; the FIQ method
> > gives the same error
>
> Does it mean this doesn't work at all to play sound ? IIRC Sascha
> driver used
> to work with the non-dmaengine implementation on 2.6.34.
>
indeed, doesn't work at all. I know it used to work on 2.6.34.
We also have a fsl linux 2.6.22 were it works.
I must say: when i use aplay to play a mono file, then there is no
error, it just never ends, and no sound also.
For a stereo file, it gives the error.
Mark also that when I use madplay (v0.15.2) (or mp3play) to play a mono
or stereo mp3, it allocates 3 DMA channels, but only frees one after the
error.
J?rgen
>
>
> Thanks,
>
> Philippe
>
--
J?rgen Lambrecht
R&D Associate
Tel: +32 (0)51 303045 Fax: +32 (0)51 310670
http://www.televic-rail.com
Televic Rail NV - Leo Bekaertlaan 1 - 8870 Izegem - Belgium
Company number 0825.539.581 - RPR Kortrijk
next prev parent reply other threads:[~2011-07-08 14:19 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-07-08 13:24 [RFC PATCH] ARM ASoC: add sound driver for imx27pdk using mc13783 codec Jürgen Lambrecht
2011-07-08 14:11 ` Philippe Rétornaz
2011-07-08 14:19 ` Lambrecht Jürgen [this message]
2011-07-27 8:28 ` Philippe Rétornaz
2011-07-29 19:14 ` Jürgen Lambrecht
2011-09-20 11:39 ` Philippe Rétornaz
2012-01-25 15:45 ` Philippe Rétornaz
2012-01-28 20:57 ` Fabio Estevam
2012-01-29 19:01 ` Philippe Rétornaz
2012-01-30 15:59 ` Fabio Estevam
2012-02-02 17:32 ` [alsa-devel] " Mark Brown
2012-02-03 7:45 ` Philippe Rétornaz
2012-02-03 11:58 ` Mark Brown
2012-02-09 21:24 ` Fabio Estevam
2011-07-09 2:25 ` Mark Brown
2011-07-11 10:30 ` Lambrecht Jürgen
2011-07-11 11:44 ` Mark Brown
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