[alsa-devel] Need your advice: Add a new communication inteface between HD-Audio and Gfx drivers for hotplug notification/ELD update

[Raymond Yau]

>
> >> And I have a question: how to assure the audio/gfx client find its
right peer?
> >> On a x86 platform, there can be an integrated GPU and an discrete GPU.
So there can be two audio controllers and two GPUs.
> >> We need to assure audio controller find the proper GPU, and vice
versa. Maybe we need the peer audio/gfx to register with a same identifier
(something like vendor ID) for peering.
> >
> > Yes, it's an open issue.  So far, the binding with vga_switcheroo is
> > done by a rough guess with PCI ID.
>
> Yeah, I guess we need platform/bus specific hints.

http://www.displayport.org/cables/driving-multiple-displays-from-a-single-displayport-output/

How do the audio driver know which displays when a single displayport
output can drive multiple displays ?