fanoush,

I will put something into a "fanoush is a super kernel hacker" kitty for you *whoever wins the bet*
Its no good having the new bits of hardware available without software support.

as for xv rotation problem, I created a small x11 xv test application to identify the problems, I'll reopload it and PM you later so you can see for yourself.

It just breaks when its rotated 90 or 270 degrees, plain and simple. 0 and 180 degrees works though and I've managed to get a 480*480 square showing correctly.
Its likely just a tweak ontop of the existing xrandr patch, but I still haven't built my own kernel (yes, I know I'm not a jedi yet!)