There is no drivers/gpu/pvr/ in OpenWRT's 3.3.8 tree. If somebody has that stuff working on the n810, I haven't heard about it, and there's no sign of it in the kernel tree. The last work I saw was back in 2009, and it was very unstable.

I'll go ahead and look in my crystal ball and predict that there will never be usable powervr support on the n810. What little time I have for the OpenWRT port is focused on the basics: stable kgdb, WiFi, and power management. It'd be great if some intrepid hacker would take up the powervr support again, but it's a rough proposition, what with open source kernel talking to sorta working binary blobs in user space. And I don't think all the retrace hooks ever got worked out. And at this point there's nobody who might help at either TI or Nokia.

Andy