[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 #8 from Peter Wu <peter at lekensteyn.nl> ---
Following these steps I always see an audio function (01:00.1):

1. Power off laptop
2. Insert miniDP cable (HDMI probably works as well, did not test)
3. Power on laptop
4. Check lspci -s1:

When booting the laptop without cable there is some other weird behavior:
1. Power on laptop
2. Run "lspci -s1: ; lspci -H1 -s:"
   (first command also resumes the dGPU as side-effect)
   Expected: 2x 01:00:0
3. Wait 5 seconds for the card to runtime suspend (important, verify that this
is actually the case, e.g. by watching "dmesg -w").
4. Insert cable
5. Run the above two lspci commands again. Now I also see the audio function
(01:00.1).
6. Repeat step 3, remove audio cable, repeat step 5 (now the audio function is
gone again!)

This was tested on a Clevo P651RA (GTX 965M). Weird!

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