[Bug 104952] [regression] Loss of i915 (Apollo Lake/Broxton) HDMI audio after display sleep v4.14+

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=104952

--- Comment #1 from Imre Deak <imre.deak at intel.com> ---
Could you check the commits wrt. commit IDs? The ones you gave don't match.
They are correctly:

e8a3a2a3d7f7a1 is "drm/i915/bxt, glk: Fix assert on conditions for DC9
enabling"

and

42d9366d41a992 is "drm/i915/gen9+: Don't remove secondary power well requests"

Which of the above ones did you get as the first bad commit?

If the bisect result is that e8a3a2a3d7f7a1 is the first bad commit then it's
an incorrect result, since it only changes the condition for a WARN message
(which doesn't trigger in any case in your log).

I also doubt that 42d9366d41a992 would be a good result. The only difference
it'd make is if a secondary power well request was set, in which case this
request wouldn't be removed after this commit. But then you'd have the

"Power well X forced on ..."

debug message, which you don't have in your log. So I don't see how this commit
could make any difference either in your case.

All I can think of is some timing change, or that you didn't try enough to
reproduce the issue with the commit preceding the bisect result.

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