Ubuntu Rockchip Project Notice
github.com
github.com
Jeff's video on this:
This is a very thankless task if the board vendors (who will have access to Rockchip support) won't help either.
When there are a lot of different platforms, it's very easy to get your energy drained simply by an endless parade of small things, without getting to the point of completely solving anything. And there is no payoff since the vendors and rockchip lock up any profit.