On Fri, Jan 24, 2014 at 3:23 AM, Raymond Yau <superquad.vort...@gmail.com> wrote: > >> >> >> 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 ?
Generally, there is a back channel between the display hardware and the audio hardware. Alex _______________________________________________ Intel-gfx mailing list Intel-gfx@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/intel-gfx
