Hello,

> The question I have is, 'how do we _know_ there's a UDA1341 in the 
> J720 and how do we know how it's wired up?'

From what I believe, it sits on L3 connected via SA1111, thus it
would be possible to detect it. I don't have a J720 myself, so I can't
play with it/verify it.

> It's hard to get a grasp on what an audio driver would look like when 
> you don't know where things are wired up.  Anyone know of some specific
> document other than the shameful Penguix source?

The datasheet would sure be useful, searching the Philips homepage is
as painful as reading Linux sources though.

Good luck,
	-- Jachym Holecek