Via an Xorg config?
You could probably also uninstall all xf86-video-* drivers, which should result in xf86-video-modesetting being used (it's built into xorg-server).
I tried DRI 1, 2, and 3.
You can not configure what type of DRI is being used with xf86-video-modesetting. xf86-video-modesetting does not have an option for configuring what type of DRI is being used.
Just type the following command into a terminal and see for yourself:
As you can see from the manpage, there is no such option. xf86-video-modesetting uses DRI3.
Well, something is broken since 7.0 with intel i195.
Hmm, no idea, maybe Juanito and curaga can help.