Not too much to see, but link to GSoC-2010 work by Matt Turner: 

[[GLINT KMS driver and documentation|http://code.google.com/p/google-summer-of-code-2010-xorg/downloads/detail?name=Matt_Turner.tar.gz&can=2&q=]] 

Also, see [[single commit|http://git.kernel.org/?p=linux/kernel/git/csimpson/linux-2.6.git;a=shortlog;h=refs/heads/tdfx-kms]], adding very initial implementation of tdfx  KMS driver