[alsa-devel] [Fwd: Re: Davinci ASoC support (patch)]

[Mark Brown]

On Fri, Mar 28, 2008 at 09:27:04AM -0500, lokowich wrote:

> Forwarded from davinci-linux-open-source list:

CCing in Vladimir Barinov who contributed the DaVinci support.

> I've built this ASoC patch into my DaVinci git kernel (thanks for the 
> SENSORS tip), and can use aplay and speaker-test, but no sound.  Figured 
> it may be a mixer/volume control issue, but the alsamixer is unable to 
> open for a failed ioctl on USBDEVFS_IOCTL.  Not sure why there is a USB 
> dependency.  Noted that there is no /sys/class/sound/mixer in my sysfs.  
> Any ideas?

It might be helpful to post dmesg output showing the sound support
being loaded.

> Bernard Blackham wrote:
> > Behme wrote:
> >   
> >> While searching something different, I just found
> >>
> >> http://www.spinics.net/lists/alsa-devel/msg12535.html
> >>
> >> As I'm not subscribed to alsa-devel, I don't have the original post. 
> >> Maybe any of the authors can post it do this list as well?
> >>
> >> The patch mainly applies to our git. I fixed two small rejects in 
> >> Kconfig and Makefile as the patch is for newer kernel than our git. 
> >> Untested patch against our git in attachment. Anybody likes to test?
> >>     
> >
> > Well, I tried compiling it and it failed to build. It appears that it's 
> > built on a set of patches for Davinci posted to LAK, including this 
> > completely revamped EDMA support[1]:
> >
> > http://www.spinics.net/lists/arm-kernel/msg47450.html
> >
> > So I had to change a few definitions, import a few functions from the new
> > DMA support and managed to get it compiling and loading, but not yet working
> > (tried various sample rates and formats):
> >
> > root at davinci-dvevm:/tst$ aplay test.wav
> > Playing WAVE 'test.wav' : Signed 16 bit Little Endian, Rate 44100 Hz, Stereo
> > ALSA lib pcm_params.c:2152:(snd_pcm_hw_refine_slave) Slave PCM not usable
> > aplay: set_params:878: Broken configuration for this PCM: no configurations
> > available
> >
> > root at davinci-dvevm:/tst$ arecord -r 48000 -f S16_LE
> > Recording WAVE 'stdin' : Signed 16 bit Little Endian, Rate 48000 Hz, Mono
> > ALSA lib pcm_params.c:2152:(snd_pcm_hw_refine_slave) Slave PCM not usable
> > arecord: set_params:878: Broken configuration for this PCM: no
> > configurations available
> >
> >
> > And this is the extent of my knowledge of ALSA - I can continue digging, but
> > maybe somebody else will beat me to it =) It's looking promising though.
> >
> > Attached is the patch I have so far that applies against current git. This
> > is not for going upstream, but just for testing. Notes:
> > - Apply patch
> > - Enable SND_SOC, SND_DAVINCI_SOC, SND_DAVINCI_SOC_I2S, SND_DAVINCI_SOC_EVM
> > and SND_SOC_TLV320AIC3X.
> > - Make sure CONFIG_I2C_DAVINCI is enabled, but disable the
> > CONFIG_SENSORS_TLV320* options.
> > - Build.
> > - Load the snd-soc-evm module.
> >
> > Bernard.
> >
> > [1] These patches appear to have gone absolutely nowhere beyond that list. I
> > can't find them in any tree. But they are cleaner and more conforming to the
> > Linux Kernel style than what's currently in git.
> >
> >   
> > ------------------------------------------------------------------------
> >
> > _______________________________________________
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> > Davinci-linux-open-source at linux.davincidsp.com
> > http://linux.davincidsp.com/mailman/listinfo/davinci-linux-open-source
> >   
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