linux-kernel - Re: [alsa-devel] [PATCH] ASoC: simple-card: overwrite DAIFMT_MASTER of cpu

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Date:	Tue, 11 Mar 2014 21:01:05 -0700 (PDT)
From:	Kuninori Morimoto <kuninori.morimoto.gx@...il.com>
To:	Nicolin Chen <Guangyu.Chen@...escale.com>
Cc:	Mark Brown <broonie@...nel.org>, <moinejf@...e.fr>,
	<alsa-devel@...a-project.org>, <kuninori.morimoto.gx@...esas.com>,
	<linux-kernel@...r.kernel.org>, <lgirdwood@...il.com>,
	<Li.Xiubo@...escale.com>
Subject: Re: [alsa-devel] [PATCH] ASoC: simple-card: overwrite DAIFMT_MASTER of	cpu_dai->fmt


Hi Nicolin

> > static struct asoc_simple_card_info fsi_wm8978_info = {
> > 	...
> > 	.daifmt		= SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_CBM_CFM,
> > 	.cpu_dai = {
> > 		...
> > 		.fmt	= SND_SOC_DAIFMT_IB_NF,
> > 	},
> > 	.codec_dai = {
> > 		...
> > 		.fmt	= SND_SOC_DAIFMT_NB_NF,
> > 	},
> > };
> 
> This would be better imo.
> 
> And ideally we should also keep the xB_xF identical like Mark said _identical_.
> Just some cpu dai drivers might do an incorrect settings for it, like regarding
> NB as sampling on rising edge and IF as active low (I'm saying this without a
> careful check though), which results people need to re-set bitclock-invert and
> frame-invert if they switch the DAI format from left_j to i2s for example.

Wow... I had misunderstood...
I need to send fixup patch after lunch.
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