[Intel-gfx] [PATCH i-g-t 0/1] chamelium: Add work in progress test for HDMI audio

[Paul Kocialkowski]

This patch contains a work in progress test for HDMI audio integrity
testing. It is currently not working and should not be merged.

It is sent as-is for reference, in hope that work in this area will be
resumed later on. It is the latest version at the time of my final
summer internship day at Intel, after which I will not have access to a
Chamelium anymore.

The test is currently failing as the Chamelium does not detect any audio,
failing with the following:
No audio data was captured. Perhaps this input is not plugged

The Chamelium logs indicate that no audio page is received:
Current page count: 0x0. Last page count: 0x0. Page count in this period: 0x0

It was checked that the EDID used properly contains the CEA block
indicating audio support.

The audio test in IGT, that involves a HDMI-VGA adapter with audio-out
implements HDMI audio integrity checking and can be used as a working
reference to debug the problem.

Once the problem is resolved, this test could be derived in different
fashions, including a suspend/resume test checking for audio integrity
before and after suspend/resume and a hotplug test checking for audio
integrity after a sequence of hotplug toggles.