[Bug 101144] [BAT][SKL] *ERROR* failed to enable link training

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https://bugs.freedesktop.org/show_bug.cgi?id=101144

--- Comment #32 from Marta Löfstedt <marta.lofstedt at intel.com> ---
(In reply to Manasi from comment #28)
> Hi Marta,
> 
> Yes that didn't help since the driver thinks that the eDP panel is already
> ON, but may be its turning on and off many times generating multiple HPD
> pulses. So just disregard the patch.
> 
> One more thing I want you to try is in the igt test itself (kms_flip.c), in
> the run_test_on_crtc_set() function, I see that kmstest_unset_all_crtcs() is
> called which actually powers off the panel. Could you add a usleep() call
> here to sleep for a few ms before actually doing a modeset where it will
> power the eDP panel back on.
> This might give some time to the panel power sequencer to stabilize before
> turning it back on.
> 
> This is one of the tests, I have few more things to debug in mind and I will
> send details regarding the second test soon.

I tested sleeping for 50ms, but is doesn't help.
Also, the issue can also start at: igt at kms_busy@basic-flip-default-*.

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