[Bug 111045] [CI][BAT] igt at kms_chamelium@(hdmi|dp)-hpd-fast - fail - Failed assertion: igt_hotplug_detected(mon, HOTPLUG_TIMEOUT)

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=111045

--- Comment #14 from emersion <contact at emersion.fr> ---
(In reply to Imre Deak from comment #6)
> There could be a chamelium config issue wrt. HDMI, since there is no HDMI
> sinks connected (even the USBC->HDMI dongle will show up as DP), but the
> HDMI chamelium subtests are not skipped as they should be. 

I think the configuration is fine. I routinely run HDMI tests on my DP port
with lspcon, and configuring .igtrc to map the DUT DP output to the Chamelium
HDMI input works.

> However probably all the DP kms_chamelium tests will fail expectedly on
> DP-alt outputs. 

Can you elaborate? I'm not sure I understand.

> The exceptions could be kms_chamelium subtests where the
> subtest properly handles hotplug events: enables/disables the output
> according to the connect/disconnect hotplug event it receives. That's not
> the case atm with most of the kms_chamelium subtests.

Why is this needed? If a user plugs a USB-C to HDMI dongle, the DRM client
should see a hotplug event even if the output hasn't been enabled yet, right?

Some tests currently assert HPD on the Chamelium side and expect a hotplug. Is
this supposed not to work with DP-ext?

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