I will partially replay to myself:
SB backend seam to be merged, and can be turned on by R600_DEBUG=sb. (Require Mesa 9.2, LLVM back end if I want it also)
DPM require kernel 3.11 or higher + updated firmware for gpus.
UVD require kernel 3.10, vdpau, firmware, and mesa compilation config.
(Will remove fglrx now, and test if its clean removal)