[alsa-devel] [PATCH 1/3] ASoC: Add a new imx-ssi sound driver

[Sascha Hauer]

On Mon, Nov 30, 2009 at 06:09:24PM +0100, javier Martin wrote:
> 2009/11/30 javier Martin <javier.martin at vista-silicon.com>
> 
> > Dear Sascha,
> > in "imx_ssi_set_dai_fmt()" callback you should add something like:
> >
> >     /* sync */
> >     scr |= SSI_SCR_SYN;
> >
> > This would enable SSI working in SYN mode which means that RX and TX
> > sections will share same frame and bit clocks. Right now I can't imagine a
> > situation where this is not desirable. Moreover, if I don't add SYN mode I
> > cannot get it working in my i.mx27 based board with an wm8974.
> >
> 
> Well, after a chat with Mark it seems that it is not so uncommon that RX and
> TX sections have different clocks. So you could add a flag in the platform
> data similar to the one that switches between FIQ and DMA so that people can
> choose if they want the feature or not.

Ok, will do. I myself use the asynchronous mode. The MC13783 I use has
two SSI ports, one for capture and one for playback. I route both ports
to the same SSI unit using the audio muxer.

Sascha


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