[alsa-devel] No pcm device?

Mark Brown broonie at sirena.org.uk
Mon Oct 20 16:01:16 CEST 2008

On Mon, Oct 20, 2008 at 03:54:32PM +0200, John Kacur wrote:
> On Mon, Oct 20, 2008 at 3:24 PM, Mark Brown <broonie at sirena.org.uk> wrote:

> Here is the outline of my design. So, if I understand you correctly,
> my jade-pcm.c file is just for implementing dma. Basically, I have a
> simple scenario there is no capture, just read a wav file from user
> space, transport it through i2s to the codec.

> Machine Code (Jade)
> -------------------
> jade-xxsvideo.c
> jade-xxsvideo.h

I gather that both your machine and your CPU are called jade?  That
makes things a little less clear than they normally would be.

> Platform Code
> -------------
> jade-pcm.c
> jade-pcm.h

Normally you'd have a separate I2S driver here - from this...

> DAI (Digital Audio Interface)
> -----------------------------
> 	.cpu_dai 	= &jade_i2s_dai
> 		jade-i2s.c
> 		jade-i2s.h
> 	.codec_dai	= &max5556_dai
> 		max5556.c
> 		max5556.h

...it looks like that's the case, in which case everything looks

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