On KBL platforms, with HW overlay and/or PSR2, a hard hang with corrupted
display is observed while running tests that frequently disable/re-enable
primary/overlay planes. Details recorded in this FDO bug:
https://bugs.freedesktop.org/show_bug.cgi?id=104975.
The issue has been root caused as a
The patch https://patchwork.freedesktop.org/patch/166512/ which relies on HW
tracking for frontbuffer flushes/invalidations leads to an indefinite block
when running any of the *psr* subtests of the kms_frontbuffer_tracking test.
===Failure analysis===
Subtest: kms_frontbuffer_tracking --run-su
