Re: asoc: no valid backend routes for PCM: SDP4430 Media

[Liam Girdwood <lrg@ti.com>]

On 09/06/11 18:45, hong zhang wrote:
> Liam,
> 
> Arecord gets data from DMIC! Using following commands.
> 
> "arecord -f dat -D plughw:0,0 dmic.wav" with "amixer cset numid=61 1 and
> amixer cset numid=60 2" to get data from DMIC after turning off two analog captures.
> 
> Information from "arecrod -l" is not sync with ABE routing table. For example, "arecord -l" indicates hw:0,10 is DMIC capture but 
> ABE diagram indicates plughw:0,0 can be used for DMIC input.
> 
> Are "arecord -l" and "aplay -l" still useful?

Yes, but not for OMAP4 atm.

Thanks

Liam

> 
> ---henry
> 
> 
> --- On Thu, 6/9/11, 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: Thursday, June 9, 2011, 4:42 AM
>> Hi Henry,
>>
>> On 08/06/11 20:08, hong zhang wrote:
>>> 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.
>>>
>>
>> There is an omap2plus defconfig.
>>
>>> 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
>>>
>>
>> The easiest thing todo first is to get arecord working. Use
>> hw:0,1 for DMIC and make sure you use alsamixer to configure
>> the correct audio paths for DMIC to hw:0,1.
>>
>>> 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!
>>>
>>
>> It does look like you have not configured the audio route
>> here for the DMIC to hw:0,1. Use the ABE diagram to create
>> your route with alsamixer.
>>
>> Liam
>>
>>> Thanks.
>>>
>>> ---henry
>>>
>>> --- On Wed, 6/8/11, 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: 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
>>>>
>>>>
>>
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