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

[Kuninori Morimoto]

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