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

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Date:	Tue, 11 Mar 2014 20:36:22 -0700 (PDT)
From:	Kuninori Morimoto <kuninori.morimoto.gx@...il.com>
To:	Mark Brown <broonie@...nel.org>
Cc:	Nicolin Chen <Guangyu.Chen@...escale.com>, 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 Mark

> > > asoc-simple-card sound-cs42888.12: cpu : 2024000.esai / 4003 / 132000000
> > > asoc-simple-card sound-cs42888.12: codec : cs42888 / 1003 / 24576000
> > > asoc-simple-card sound-cs42888.12: cs42888 <-> 2024000.esai mapping ok
> 
> > cpu   = 4003 : SND_SOC_DAIFMT_CBS_CFS | SND_SOC_DAIFMT_LEFT_J
> > codec = 1003 : SND_SOC_DAIFMT_CBM_CFM | SND_SOC_DAIFMT_LEFT_J
> 
> > codec is master, cpu is slave...
> > what is problem ??
> > Am I misunderstanding ?
> 
> The C in those constants stands for CODEC and the values should be
> identical for both ends of the link.

Wow ! really ??
Then, is this settiting wrong ??

${LINUX}/arch/arm/mach-shmobile/board-armadillo800eva.c :: fsi_wm8978_info

static struct asoc_simple_card_info fsi_wm8978_info = {
	...
	.daifmt		= SND_SOC_DAIFMT_I2S,
	.cpu_dai = {
		...
		.fmt	= SND_SOC_DAIFMT_CBS_CFS | SND_SOC_DAIFMT_IB_NF,
	},
	.codec_dai = {
		...
		.fmt	= SND_SOC_DAIFMT_CBM_CFM | SND_SOC_DAIFMT_NB_NF,
	},
};

It should be like this ?

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,
	},
};
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