[Nouveau] [Bug 75985] [NVC1] HDMI audio device only visible after rescan

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=75985

--- Comment #52 from Lukas Wunner <lukas at wunner.de> ---
(In reply to Ilia Mirkin from comment #49)
> (In reply to Maik Freudenberg from comment #47)
> > There's of course the possibility that some braindead vendor would ship a 3D
> > class tagged device actually having outputs.
> 
> This happens. A lot.

Ilia, do you have definitive knowledge of GPUs which
a) have a different class than PCI_CLASS_DISPLAY_VGA and
b) have working DP/HDMI outputs and
c) have an integrated HDA controller?

I'm asking because get_bound_vga() in sound/pci/hda/hda_intel.c specifically
matches against PCI_CLASS_DISPLAY_VGA only. In other words, if a GPU with the
three above-listed properties exists and is built into a hybrid graphics
laptop, it is currently not registered with vga_switcheroo, which would be
wrong.

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