(In reply to Peter Wu from comment #7)
> Created attachment 127678 [details] [review] [review]
> amdgpu patch that checks whether the new interface can be used for PM
> 
> PCIe port PM is not enabled because this BIOS is pre-2015: 12/04/2014
> The BIOS seems to be able to report support for lots of things (can you post
> a fuller dmesg that include the supported functions?):

Can we bump the bios white list to 2014?  Windows enabled Hybrid graphics on
windows 8.x as well as 10, and a number of preliminary win10 systems have 2014
bios versions.  I'd prefer that to doing all of these hacks in the drivers.