[alsa-devel] asoc: no valid backend routes for PCM: SDP4430 Media
henryzhang62 at yahoo.com
Thu Jun 9 19:45:09 CEST 2011
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?
--- On Thu, 6/9/11, 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: 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
> > 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 !
> ! audioconvert ! wavenc! filesink
> > 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
> 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.
> > 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
> >> and gstreamer-alsa.
> >>> In 2.6.35, arecord returns 44 bytes with read
> >>> 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
> >> 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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