I've started looking at switching Rockchip64-DEV to 5.0.y ... I've now my RockPro64 under 5.0.y ... It look much more easier task than the previous one with Sunxi-DEV !   @Igor , I've pushed a "rockchip64-4.20" tag that will allow to bring 4.20.y into NEXT if we wish ...   Also, is there any reason why RockPro64 still using U-Boot SPL 2017.09-armbian (from Ayufan's branch) instead of Mainline U-Boot such v2019.01 ? If No, I will switch that too ...