xf86-video-intel-2.21.15 should now work on your DragonFly system. I don’t see it in dports, yet, though.
xf86 like XFree86 like the project that was superceded by X.org? Am I reading it wrong or is this for the old X server that hasn’t been around for a while?
Works with xorg – just named the old way.
DragonFly BSD Digest