[alsa-devel] asoc: no valid backend routes for PCM: SDP4430 Media

[hong zhang]

Liam,

I have downloaded kernel tar ball. Three questions need your help.

1. which defconfig should be used in arch/arm/configs?
   I do not see OMAP4 for SDP4430 (blaze board). Panda does not have DMIC 
   only blaze has it.

2. On blaze board, I have to turn off two analog captures and leave DMIC open. Can you verify my gst-launch is correct? I cannot capture voice from DMIC on OMAP4 blaze board us it.

   gst-launch-0.10 -v alsasrc num-buffers=1000 ! 'audio/x-raw-int,rate=8000,channels=1,endianness=1234,width=16,depth=16' ! audioconvert ! wavenc! filesink location=/home/normanc/Desktop/8000.wav

3. If I specify DMIC device, command is rejected.

gst-launch-0.10 -v alsasrc device="hw:0,10" num-buffers=1000 ! 'audio/x-raw-int, rate=8000,channels=1,endianness=1234,width=16,depth=16' ! audioconvert ! wavenc! filesink location=/home/normanc/Desktop/8000.wav

TI support team in France says item 2 should work for DMIC. But I simply could not get it. TI team says item 2 works for "official release 2.6.35-990-omap4 #9".

I have spent 1 week on it with 2.6.35-990-omap4 #9

Please advise!

Thanks.

---henry

--- On Wed, 6/8/11, Liam Girdwood <lrg at ti.com> wrote:

> From: Liam Girdwood <lrg at ti.com>
> Subject: Re: [alsa-devel] asoc: no valid backend routes for PCM: SDP4430 Media
> To: "hong zhang" <henryzhang62 at yahoo.com>
> Cc: "alsa-devel at alsa-project.org" <alsa-devel at alsa-project.org>
> Date: Wednesday, June 8, 2011, 9:22 AM
> On 07/06/11 20:59, hong zhang wrote:
> > 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.
> > 
> 
> DMIC works on OMAP4, can you try my branch :-
> 
> https://gitorious.org/omap-audio/linux-audio/commits/lrg/topic/omap-asoc-next-3.1
> 
> Liam
> 
>