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From: hong zhang <henryzhang62@yahoo.com>
To: Liam Girdwood <lrg@ti.com>
Cc: "alsa-devel@alsa-project.org" <alsa-devel@alsa-project.org>
Subject: Re: asoc: no valid backend routes for PCM: SDP4430 Media
Date: Tue, 7 Jun 2011 12:59:10 -0700 (PDT)	[thread overview]
Message-ID: <307164.60382.qm@web161713.mail.bf1.yahoo.com> (raw)
In-Reply-To: <4DEDE38B.2040408@ti.com>

Liam,

Actually, I could not prove DMIC on OMAP4 blaze board is working in both kernel 2.6.35 and 2.6.38 using arecord and gstreamer-alsa.

In 2.6.35, arecord returns 44 bytes with read error
In 2.6.38, arecord collects native data.

Gstreamer-alsa could not get voice after turning off analog captures using amixer. 

Any information regarding DMIC on OMAP4? I see people send DMIC patch to 2.6.38.

Please advise.

---henry

--- On Tue, 6/7/11, Liam Girdwood <lrg@ti.com> wrote:

> From: Liam Girdwood <lrg@ti.com>
> Subject: Re: [alsa-devel] asoc: no valid backend routes for PCM: SDP4430 Media
> To: "hong zhang" <henryzhang62@yahoo.com>
> Cc: "alsa-devel@alsa-project.org" <alsa-devel@alsa-project.org>
> Date: Tuesday, June 7, 2011, 3:38 AM
> On 07/06/11 01:13, hong zhang wrote:
> > List,
> > 
> > After capturing data from DMIC on OMAP4 blaze board
> with kernel 2.6.38 and save wav data to 38.wav.
> > 
> > But aplay complains "no valid backend routes". See
> following,
> > 
> > $aplay -f dat 38.wav 
> > [  157.167724] asoc: no valid backend routes for
> PCM: SDP4430 Media
> > aplay: main:654: audio open error: Invalid argument
> > 
> 
> This means you have not configured an audio route for
> playback (i.e. the audio is not routed anywhere from pcm
> hw:0,0). Use alsamixer and configure the kcontrols to define
> the audio path. The kcontrol mappings to audio paths are
> detailed here for OMAP4 :-
> 
> http://omappedia.org/wiki/Audio_Drive_Arch
> 
> Liam
> _______________________________________________
> Alsa-devel mailing list
> Alsa-devel@alsa-project.org
> http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
> 

  reply	other threads:[~2011-06-07 19:59 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2011-06-07  0:13 asoc: no valid backend routes for PCM: SDP4430 Media hong zhang
2011-06-07  8:38 ` Liam Girdwood
2011-06-07 19:59   ` hong zhang [this message]
2011-06-08 14:22     ` Liam Girdwood
2011-06-08 19:08       ` hong zhang
2011-06-09  9:42         ` Liam Girdwood
2011-06-09 17:45           ` hong zhang
2011-06-09 17:48             ` Liam Girdwood
2011-06-09 17:52               ` hong zhang
2011-08-19  7:53                 ` asoc: no valid backend routes for PCM Sarika
2011-08-19 16:20                   ` Liam Girdwood
     [not found]                     ` <CAHgabbYxe-mzwhxiivj5Xmqdq3FQuZ3ZFhgU4wy_bCosm2BhwA@mail.gmail.com>
2011-08-22 10:54                       ` Liam Girdwood

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