From mboxrd@z Thu Jan  1 00:00:00 1970
From: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Subject: Re: How to specify data format if playback/capture
	were different ?
Date: Wed, 22 May 2013 01:54:38 -0700 (PDT)
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To: Lars-Peter Clausen <lars@metafoo.de>
Cc: Linux-ALSA <alsa-devel@alsa-project.org>, Mark Brown <broonie@opensource.wolfsonmicro.com>, Liam Girdwood <lgirdwood@gmail.com>, Simon <horms@verge.net.au>, Kuninori Morimoto <kuninori.morimoto.gx@gmail.com>
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Hi Lars

> > struct snd_soc_dai_driver ak4554_playback_dai = {
> > 	.name = "ak4554-playback",
> > 	.playback = {
> > 		...
> > 	},
> > }
> > 
> > struct snd_soc_dai_driver ak4554_captrure_dai = {
> > 	.name = "ak4554-captrure",
> > 	.capture = {
> > 		...
> > 	},
> > };
> 
> You'll want to put both DAIs into an array which you can pass to
> snd_soc_register_codec, but otherwise it looks ok.
> 
> > 
> > But, ak4554 needs .symmetric_rates between playback <--> capture.
> > Is it possible ?
> > Or, am I misunderstanding ?
> 
> Yes, that won't work, you'd have to implement this by hand.

OK, I understand, thank you.

But do you know why snd_soc_dai_set_fmt() doesn't support
"setting for playback/capture only" ?
Historical reason or system reason ?
Can I try it ?

Best regards
---
Kuninori Morimoto