On Wed, Jun 16, 2021 at 11:23:36AM -0500, Pierre-Louis Bossart wrote:

> > On this platform there is no TDM support, so there were two I2S data lines.

> Interesting, I haven't seen such 'multi-lane' solutions so far for I2S.

They're moderately common for high end systems (eg, you'll see surround
sound systems do this) - it makes it easier to find higher performance
DACs if you can use regular stereo DACs and it helps a bit with layout
if you can run slower digital signals.  There's controllers upstream
that do this without needing to tie together multiple stereo controllers
on the SoC side, one of the variants of the Samsung I2S controllers does
it for example.