I've been running bananian with the 4.4 kernel on my bpi-R1 (A20 SoC) and everything seems to be working fine. Although I don't use it for anything graphical (it's a networking/storage/server device.) Can't say how much it's relying on binary blobs though.
Re:CHIP Pro
by mynameislegion on Wednesday October 12, 2016 @03:06AM
(#12690912)
Sadly Allwinner did zero of that mainlining.
http://linux-sunxi.org/Linux_mainlining_effort#Status_Matrix
EDIT: The GR8 is specifically called out on this page as having mainline support from kernel 4.9.