Will there be an Archlinux distro be available ?
Archlinux for Orion
I think there will be, for sure
This is the wrong question.
Properly made board should boot whatever distro. Out of the box. Like you have in x86-64 world.
Will there be a how-to from migrating from a working rock 5b installation to orion ?
will there be like rock 5b an installation wiki ?
maybe someone of Radxa can answer the questions.
Board present in mainline kernel, with sane firmware stored in on-board flash, boots whatever mainline distribution.
Sure, many arm SBCs are Seriously Bad Computers and require external patches for anything but their vendors should be ashamed.
Arm tried to introduce some order with creation of SBSA, then BSA and now even PC-BSA but SBC market mostly ignored those specifications.
You don’t need to have the board inside the kernel as UEFI can pass through a DTB that should be used by the kernel.
Would you be satisfied with “s/board/SoC used in board and it’s peripherials/” then?
Last time I looked there was no trace of CD8180 SoC in mainline Linux kernel.
So yes, you can give DTB to the kernel but if support is not there then kernel will not have drivers to attach to nodes in that DTB.
Let me take RK3588 as an example - your DTB can have info about both hdmi outputs and hdmi input but mainline would not use all of them as drivers are not merged yet.