Re: Audio support on OMAP 3430LDP or 4430SDP boards

[Russell King - ARM Linux <linux@arm.linux.org.uk>]

On Mon, Apr 30, 2012 at 10:26:45AM +0300, Peter Ujfalusi wrote:
> On 04/29/2012 11:35 PM, Russell King - ARM Linux wrote:
> > Please can someone at TI take a current mainline kernel, build it, and
> > test out audio support on the 4430SDP - specifically output through the
> > headset jack into a line input, and report when it works.  Thanks.
> 
> Try to use my attached aconf for SDP4430 to configure the HS playback.
> Note that the HS is not a line out, so on your line-in device it will
> cause distortion. If you have a headset/headphone you will have better
> quality.
> alsactl -f blaze.aconf restore

This had no effect on its own.

> To play samples with aplay:
> aplay -Dplughw:0,0 <wav file>
> The sample format fot Legacy McPDM is S32_LE, 96KHz, 24bit (32 bit
> sample with 24 LSB).
> 
> The slow pace audio playback is because at this point we do not have the
> full audio stack up. The AESS IP does not have driver. You need to
> disable CONFIG_OMAP_RESET_CLOCKS. This will fic the audio playback speed.

But with that configuration file and that option disabled, I now get
audio output via the HS jack.  Bellowhead sounds a lot better now.