Phoronix: DragonFlyBSD Pulls In FreeBSD's AMD Radeon Driver
In late August an open-source AMD Radeon KMS graphics driver was added to FreeBSD after being ported over from the Linux kernel; this new Radeon KMS driver will be a feature of FreeBSD 10.0. DragonFlyBSD developers have now in turn ported the FreeBSD Radeon graphics driver to their BSD distribution...
I hope the DragonFly BSD developers manage to contribute some patches back to Mesa and Radeon to improve the drivers for everyone!
This won't happen. DRM/KMS is a *huge* piece of code, which requires very specific knowledge. The port is mostly a one man work, and it's already a lot of work to keep it up to date. I don't think dragonfly developpers will have time or want to improve significantly the code.