On 02/24/2012 01:05 PM, javier Martin wrote:
I don't think it is going to break. I would guess that the channels are swapped on these machines at the moment. If you correct the CPU dai driver the only thing that will happen is that the channels will jump in their correct place.
That would be true for stereo. However, mono should not be working right now.
The notion of mono in I2S, Left/Right Justified formats is not really valid. They are stereo protocols by design. DSP_A/B is used with mono audio (which often referred as PCM). It is the responsibility of the codec/cpu drivers to interpret the standards correctly, and configure themselves accordingly. Take a look at the Wolfson codec documentation they are really good in this matter (what I2S, DSP/PCM, and other coding means in real life). You can look at the omap-mcbsp driver for an example, but configuring the FS/BC polarity in the format selection (without taking a look at the INV mask) does not seam to be correct.