Decided to make a rockpi4 mainline automated image build
sudo apt-get update && sudo apt-get upgrade sudo apt-get install git
Clone the source code
cd ~ git clone --recursive https://github.com/StuartIanNaylor/mainline-bsp.git
Just got the skeleton in and deliberately trying to make it much simpler than the spaghetti of the 4.4 bsp.
Clone, copy and contribute as will prob be scratching my head!