Hi all,
Maybe you've played with this already.. But if not, looks like the beagle-x15 folks got etnaviv acceleration working with some extra patches against mainline kernel:
https://eewiki.net/display/linuxonarm/BeagleBoard-X15#BeagleBoard-X15-2DVide... https://www.spinics.net/lists/linux-omap/msg133272.html
That's the drivers/gpu/drm/etnaviv driver, known as BB2D in the TRM. No idea about the frame rates, but might be an acceptable open source solution for accelerated video for pyra. I think it's the same setup on 5432.
Cheers,
Tony