I just received notice that my (trivial) patch to add support for XG40 chips (as used in Volari V3EX, V3XT, V5, and V8 cards) is in the mainline tree. In a practical sense, what does this mean? Well, if you have one of those cards you can use the open DRM, open DDX (from fd.o GIT) with the closed DRI.
For those who haven't been keeping up, XGI cannot open the code for the DRI driver. It uses a lot of code license from SGI. However, this does provide us another step towards creating an open DRI driver. The data books are in fd.o bugzilla.
Start hacking!