"Thanks to recent commits in the RandR 1.2 branch for the
open-source X.Org Radeon driver, it's now possible to use S-Video
and composite TV output on your ATI graphics card without any
patches. This is not limited to the R200 series but will also work
with the R300 series and theoretically any graphics card supported
by the xf86-video-ati driver. In this guide have outlined the
instructions for enabling TV output support from the Radeon driver
git code as well as some of the current limitations.
"The commits in the RandR 1.2 branch earlier this month by Alex
Deucher brought in initial TV out support..."