[alsa-devel] [PATCH v2 1/3] ARM: shmobile: armadillo800eva: Properly specify HDMI audio link format

[Lars-Peter Clausen]

On 01/27/2015 08:40 AM, Kuninori Morimoto wrote:
>
> Hi Lars
>
> Thank you for your patch
>
>> The DAI link format should be specified for the whole link rather than just
>> one component on the link. So move the format specification for the HDMI
>> audio link from the CPU component to the link itself.
>>
>> Since the sh-mobile-hdmi DAI driver doesn't implement the set_fmt() callback
>> in this case there is no functional difference between only specifying the
>> the format for the CPU side or for the whole link, but the later it will
>> allow us to remove support for just specifying the format for one component.
>>
>> Signed-off-by: Lars-Peter Clausen <lars at metafoo.de>
>> ---
>> No changes since v1.
>> ---
>>   arch/arm/mach-shmobile/board-armadillo800eva.c | 2 +-
>>   1 file changed, 1 insertion(+), 1 deletion(-)
>>
>> diff --git a/arch/arm/mach-shmobile/board-armadillo800eva.c b/arch/arm/mach-shmobile/board-armadillo800eva.c
>> index 6d949f1..75de26c 100644
>> --- a/arch/arm/mach-shmobile/board-armadillo800eva.c
>> +++ b/arch/arm/mach-shmobile/board-armadillo800eva.c
>> @@ -1040,9 +1040,9 @@ static struct asoc_simple_card_info fsi2_hdmi_info = {
>>   	.card		= "FSI2B-HDMI",
>>   	.codec		= "sh-mobile-hdmi",
>>   	.platform	= "sh_fsi2",
>> +	.daifmt		= SND_SOC_DAIFMT_CBS_CFS,
>>   	.cpu_dai = {
>>   		.name	= "fsib-dai",
>> -		.fmt	= SND_SOC_DAIFMT_CBS_CFS,
>>   	},
>>   	.codec_dai = {
>>   		.name = "sh_mobile_hdmi-hifi",
>
> I guess if you want to use common .daifmt, it should be same as "codec" side.
> (cpu side "S" means, codec / daifmt side "M")
> So, this mean above should be
>
> @@ -1040,9 +1040,9 @@ static struct asoc_simple_card_info fsi2_hdmi_info = {
>   	.card		= "FSI2B-HDMI",
>   	.codec		= "sh-mobile-hdmi",
>   	.platform	= "sh_fsi2",
> +	.daifmt		= SND_SOC_DAIFMT_CBM_CFM,   <=
>   	.cpu_dai = {
> 		.name	= "fsib-dai",
> -		.fmt	= SND_SOC_DAIFMT_CBS_CFS,
>   	},

Right now the CPU is configured as master, with your proposed change it 
would be configured as slave. These flags are always from the CODEC's 
perspective.