I am doing a build with the modification for the hdmi and I add more support for the controller (GreenAsia etc ..) because I am carrying a port of Retropie on ArmbianOS. So if in the release you do, if you could integrate more support for the controllers it would be great and transparent for the rest of the other users. I am carrying under Stretch and without a desk
don't forgot this one https://patchwork.kernel.org/patch/10297391/