Nouveau Gets Patches For HDMI Stereoscopic 3D Output
HDMI 1.4 added support for stereoscopic 3D formats. Assuming you have a 3D TV and a capable NVIDIA GPU, the Nouveau DRM driver has patches available for supporting HDMI stereoscopy. Wiring up the said support into the current Nouveau DRM kernel driver is a feat achieved in just about 200 lines of code.
If you are interested, the current set of six patches for this feature written by Alastair Bridgewater can be found on the mailing list.