Phoronix reports NVIDIA will share some 2D (and potentially 3D) Tegra documentation with the open-source community. Earlier this year NVIDIA came under fire by Linus Torvalds who called NVIDIA the worst company ever for their poor open-source support.
One of the early slides by Stach stated "NVidia committed to OpenSource." It was during this slide when he relayed word by NVIDIA's Andy Ritger that NVIDIA would be releasing some 2D Tegra documentation. He also hopes that it will continue with 3D documentation. Andy Ritger is the only NVIDIA employee here this week at the SUSE headquarters for XDC2012, the annual three-day X.Org Developers Conference that's filled with Phoronix-sponsored beer for the free software developers.
Up to this point NVIDIA hasn't exactly been open-source friendly with not providing any documentation and also not supporting the Nouveau open-source driver project. Their official stance is that they will not do anything to help nor hinder Nouveau.
Recently, however, there's seemingly been an interesting change of attitude with Nouveau having some same-day support since two developers managed to somehow get their hands on GeForce GTX 680 graphics cards early. Early GK110 support is also underway. Don't be surprised if you see more NVIDIA support going forward in some subtle ways.