I’ve pushed new DSS2 patches to my git tree at http://www.bat.org/~tomba/git/linux-omap-dss.git
The latest stuff is in the master branch.
There’s also rotate branch that contains experimental patches for VRFB and DMA rotation (no mirroring yet). I don’t recommend those patches for anyone but the bravest =). You can select rotation type with omapfb.rotate_type= kernel option, where t is 0 for DMA rotation and 1 for VRFB rotation. Rotation angle can be set with omapfb.rotate=, where r is 0-3. Rotation can also be set from /sys/class/graphics/fb?/rotate file.