On Thu, Feb 23, 2012 at 04:58:09PM +0100, javier Martin wrote:
So, let's see if I understood properly. If I want to configure the i.MX SSI into standard, I2S format I should do:
dai_format = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF; snd_soc_dai_set_fmt(cpu_dai, dai_format);
Yes.
While initially TFSI bit is set because of I2S flag, it is then cleared because of the NB_NF.
Does this mean this is a bug then? If it is, I would gladly fix it but
I've no idea what any of the register settings mean here...
there is at least one platform relying on this misleading behavior that I can't test: http://lxr.linux.no/#linux+v3.2.7/sound/soc/imx/wm1133-ev1.c#L81
That was correct at the time it was written, though the code has changed since then and I don't know when it was last retested. Of course depending on the signal it may interoperate well even if the setup isn't actually correct. I'd just fix the driver and if it works for yours it's probably OK for that board too.