From what I can see at a glance its mostly loads upon loads of graphics code / graphics cards stuff. Its possible they have upstreamed entire drivers into their

From what I can see at a glance its mostly loads upon loads of graphics code / graphics cards stuff. Its possible they have upstreamed entire drivers into their code base. I spotted some stuff that hints at low level protocols as well (i2c f.e.), so probably its just a whole lot of work to support AMD graphics cards. Potentially they upstreamed a driver or something.