[robert_foss]

You can't really blame a tiny manufacturer for not having all the drivers upstreamed. They probably don't have access to the relevant datasheets even if they had the money/time/developers to pursue full upstreaming. Upstreaming drivers is the vendors responsibility.

[jrwr]

even the rPi has a bunch of firmware that just is not open sourced, they used their own kernel for years because of that.