Yes. Most of the hardware on most of the Orange Pi boards has mainline support as of Linux 4.17. The main exceptions seem to be camera support (forthcoming in 5

Yes. Most of the hardware on most of the Orange Pi boards has mainline support as of Linux 4.17. The main exceptions seem to be camera support (forthcoming in 5.0), video decode and encode (work in progress), 3D graphics (even more experimental work in progress), HDMI audio (???), and the handful of boards which use the Allwinner H6 or more exotic chips.