radeon_hd needs ACPI support for finding the AtomBIOS
|Reported by:||kallisti5||Owned by:||tqh|
Radeon HD devices can stash their AtomBIOS in the ATRM ACPI node. We should try and obtain a copy there first before attempting other methods.
The location this needs done in is: http://cgit.haiku-os.org/haiku/tree/src/add-ons/kernel/drivers/graphics/radeon_hd/radeon_hd.cpp#n133
Defines of the AMD ACPI methods are here: http://lists.freedesktop.org/archives/dri-devel/2012-July/025517.html
ATRM contains the AtomBIOS (or points to it, not 100% how that works)
At the moment, a lot of cards that should be using the ATRM node are falling back to my Video shadow bios hack (0xC0000) which can be unreliable.