Reviving an old i.MX6 based tablet with Etnaviv

[Bernhard Rosenkraenzer]

Hi,
I just got hold of an old i.MX6 based Fastwel ONYX-08 tablet (seems to be fairly close to an imx6q-sabresd) with a prehistoric SW stack (based on kernel 3.14.52) that has apparently never seen a source release.

I think getting that up and running on a current stack with Etnaviv would be fun (even though a bit of a challenge primarily because boot messages aren't visible -- if there's any way to attach a serial port to this device, I haven't found it yet), but so far my attempts to get the display up haven't worked. I'm assuming Etnaviv doesn't see the GPU because the devicetree file is configured for the binary driver, but I'm not an expert on devicetree.

I've uploaded the tablet's devicetree file (unfortunately, a decompiled one -- looks like the source was never released, but I could locate the dtb in the boot partition) to http://lindev.ch/onyx08.dts

Does anyone have any pointers to help get me started on this?

Thanks!
bero