[alsa-devel] [PATCH 3/5] [RFC] ALSA ASOC Adds DSP DAI format support for platform driver

[Arun KS]

On Mon, Sep 29, 2008 at 4:45 PM, Jarkko Nikula <jarkko.nikula at nokia.com> wrote:
> On Mon, 29 Sep 2008 15:20:12 +0530
> "ext Arun KS" <arunks at mistralsolutions.com> wrote:
>
>> Enables DSP DAI format for mcbsp in omap platform driver
>>
>> Signed-off-by: Arun KS <arunks at mistralsolutions.com>
>> ---
>>  sound/soc/omap/omap-mcbsp.c |    6 ++++++
>>  1 files changed, 6 insertions(+), 0 deletions(-)
>>
>> diff --git a/sound/soc/omap/omap-mcbsp.c b/sound/soc/omap/omap-mcbsp.c
>> index 3a4cc4b..1c024aa 100644
>> --- a/sound/soc/omap/omap-mcbsp.c
>> +++ b/sound/soc/omap/omap-mcbsp.c
>> @@ -292,6 +292,12 @@ static int omap_mcbsp_dai_set_dai_fmt(struct
>> snd_soc_dai *cpu_dai,
>>               regs->rcr2      |= RDATDLY(1);
>>               regs->xcr2      |= XDATDLY(1);
>>               break;
>> +     case SND_SOC_DAIFMT_DSP_A:
>> +             /* 0-bit data delay */
>> +             regs->rcr2      |= RDATDLY(0);
>> +             regs->xcr2      |= XDATDLY(0);
>> +             break;
>> +
>>       default:
>
> I think this is not enough. The word clock length equals to one BCLK
> cycle in DSP mode. Not n channel bit BCLK cycles like in I2S.
>

In DSP Mode, Frame sync is followed by two data words.
I tested this patch and its working. Am i missing something ?

>
> Jarkko
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