asoc: no valid backend routes for PCM: SDP4430 Media

asoc: no valid backend routes for PCM: SDP4430 Media

[hong zhang]

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

$ uname -a
Linux ubuntu 2.6.38.4+ #58 SMP PREEMPT Fri Jun 3 09:44:19 PDT 2011 armv7l GNU/Linux

Does ALSA add new functionality of backend?


Thanks.

---henry

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

[Liam Girdwood]

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

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

[hong zhang]

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
> 

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

[Liam Girdwood]

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

Re: 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@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
> 
> 

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

[Liam Girdwood]

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
>>
>>

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

[hong zhang]

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?

---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
> >>
> >>
> 
> _______________________________________________
> Alsa-devel mailing list
> Alsa-devel@alsa-project.org
> http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
> 

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

[Liam Girdwood]

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
>>>>
>>>>
>>
>> _______________________________________________
>> Alsa-devel mailing list
>> Alsa-devel@alsa-project.org
>> http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
>>

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

[hong zhang]

--- 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, 12:48 PM
> 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.

1. What is OMAP4 ATM?
2. Why "hw:0,10 DMIC capture" does not work for DMIC input?
 
> Thanks
> 
> Liam
> 

Re: asoc: no valid backend routes for PCM

[Sarika]

Hello,
  I am not able to hear audio on my headset when it connect it to panda board.
What mite be the issue?
  Also panda does not has DMIC does this make any difference ?

Regards
Sarika

Re: asoc: no valid backend routes for PCM

[Liam Girdwood]

On 19/08/11 08:53, Sarika wrote:
> Hello,
>   I am not able to hear audio on my headset when it connect it to panda board.
> What mite be the issue?

This means you have no valid audio route from your pcm device to your headphone.

Please use the supplied UCM configuration files (with Ubuntu) to set the route or use alsamixer to do this manually.

http://www.omappedia.org/wiki/Audio_Drive_Arch

>   Also panda does not has DMIC does this make any difference ?
> 

No.

Liam

> Regards
> Sarika
> 
> 
> _______________________________________________
> Alsa-devel mailing list
> Alsa-devel@alsa-project.org
> http://mailman.alsa-project.org/mailman/listinfo/alsa-devel

Re: asoc: no valid backend routes for PCM

[Liam Girdwood]

Please don't drop the list from replies.

On 22/08/11 06:38, sarika baby wrote:
> Hello,
> Thanks for your information, but can you tell that if i have to add the audio route should i have to do it at kernel drivers level or else at ALSA (mydroid level) ?
> 

The routes are all configured in userspace with either UCM, alsamixer, amixer or by calling the alsa-lib C API.

Liam

> Thanks and Regards
> Soujanya
> 
> On Fri, Aug 19, 2011 at 9:50 PM, Liam Girdwood <lrg@ti.com <mailto:lrg@ti.com>> wrote:
> 
>     On 19/08/11 08:53, Sarika wrote:
>     > Hello,
>     >   I am not able to hear audio on my headset when it connect it to panda board.
>     > What mite be the issue?
> 
>     This means you have no valid audio route from your pcm device to your headphone.
> 
>     Please use the supplied UCM configuration files (with Ubuntu) to set the route or use alsamixer to do this manually.
> 
>     http://www.omappedia.org/wiki/Audio_Drive_Arch
> 
>     >   Also panda does not has DMIC does this make any difference ?
>     >
> 
>     No.
> 
>     Liam
> 
>     > Regards
>     > Sarika
>     >
>     >
>     > _______________________________________________
>     > Alsa-devel mailing list
>     > Alsa-devel@alsa-project.org <mailto:Alsa-devel@alsa-project.org>
>     > http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
> 
> 
> 
> 
> -- 
> SarikA
>