[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 #111 from Przemysław Kopa <prymoo at gmail.com> ---
(In reply to Lukas Wunner from comment #110)
> What does "cat /sys/bus/pci/devices/0000:01:00.1/hdaudioC1D0/revision_id" say?
It says: 0x100100

> If you add "codec->link_down_at_suspend = 1;" to patch_nvhdmi() in
> sound/pci/hda/patch_hdmi.c, the issue may go away.
> 
> The only question is whether your card's revision_id is listed in
> snd_hda_id_hdmi[] such that patch_nvhdmi() is executed for your card.

I added "HDA_CODEC_ENTRY(0x10de0403, "GPU 0403 HDMI/DP", patch_nvhdmi)" to
snd_hda_id_hdmi[] (PCI ID of my Nvidia HDA wasn't there) and
"codec->link_down_at_suspend = 1;" to patch_nvhdmi(). With those changes dGPU
and HDA suspended normally (after echoing "auto" to HDA control file), so I
think that this is definiteley the right track!

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