Re: [alsa-devel] How to specify data format if playback/capture were different ?

22 May 2013


      Hi Lars
Thank you for your comment
...
...
But, ak4554 case, data formats are
 playback : SND_SOC_DAIFMT_RIGHT_J
 capture  : SND_SOC_DAIFMT_LEFT_J
and, it can't exchange this data format.
CPU driver should set these information for ak4554 when playback/capture.
Then, how to specify these data format on ALSA SoC ?
You can add two different DAIs one for playback one for capture. Then you
can specify the format for each.
I understand, but still 50%.
I'm creating new "cpu" driver now too.
And, fortunately, my current "cpu" can do it as flexibility.
But, my old cpu driver ${LINUX}/sound/soc/sh/fsi.c was this
static struct snd_soc_dai_driver fsi_soc_dai[] = {
    {
    	.name			= "fsia-dai",
    	.playback = {
    		...
    	},
    	.capture = {
    		...
    	},
    ...
This means, "fsia-dai" is already including "playback" and "capture".
Sould fsi driver be below if "fsi" and "ak4554" are connected ?
Is it normal ?
static struct snd_soc_dai_driver fsi_soc_dai[] = {
    {
    	.name			= "fsia-dai",
    	.playback = {
    		...
    	},
    	.capture = {
    		...
    	},
    },
    {
    	.name			= "fsia-playback-dai",
    	.playback = {
    		....
    	}
    },
    {
    	.name			= "fsia-captrue-dai",
    	.capture = {
    		....
    	}
    }
Best regards
---
Kuninori Morimoto