[Bug 105540] [CI] igt at kms_chamelium@*-edid-change-during-suspend - fail/dmesg-fail - Failed assertion: igt_hotplug_detected(mon, HOTPLUG_TIMEOUT)

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=105540

--- Comment #13 from Stanislav Lisovskiy <stanislav.lisovskiy at intel.com> ---
There are some problems, like i915_hotplug_work_func was actually not calling
drm_helper_hpd_irq_event(dev) which we rely on, but
drm_kms_helper_hotplug_event(dev) which I guess is wrong as
drm_helper_hpd_irq_event itself calls drm_kms_helper_hotplug_event after doing
some checks and those patches rely on that drm_helper_hpd_irq_event is called.

Also the edid blob ptr doesn't get updated during probe after suspend, because
driver still uses the cached version( I checked that), which makes it
impossible to check that the edid actually got changed because the pointer and
blob is the same!

To fix this need to call drm_edid_duplicate in drm_helper_hpd_irq_event before
doing probing(drm_helper_probe_detect) which will modify
connector->edid_blob_ptr and copy it to another blob then compare to the new
one.

Currently I'm implementing those fixes.

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