Linux Overview

TI

The DaVinci GIT kernel http://processors.wiki.ti.com/index.php/DaVinci_GIT_Linux_Kernel
The DaVinci GIT kernel is the focus of community development, and staging area for DaVinci support to be pushed up to mainline. It is regularly kept up-to-date with the mainline kernel, and welcomes contributions including patches from all; coordinated on its mailing list
TI Arago project PSP releases http://processors.wiki.ti.com/index.php/DaVinci_PSP_Releases TI Arago project PSP releases: TI developers maintain their own "arago" tree based on the above community tree, but also including work-in-progress drivers which may not be available yet in the community tree. They also make official PSP releases including U-Boot and so on. The arago tree does not accept patches from developers outside TI.
MontaVista Linux Professional Edition 4.0 for DaVinci http://www.mvista.com/boards.php?vendorsearch=&boardname=&archgroup=All&processor=Davinci&edition=All&v=All&a0=1 MontaVista Linux Professional Edition 4.0 for DaVinci is available with support contracts, but based on a relatively old kernel (2.6.10)
Mainline kernel http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=summary there is the Mainline kernel which has much support merged from the community DaVinci GIT tree, but naturally lags behind it in terms of DaVinci support.