[Bug 86684] [BYT/BSW] igt/kms_psr_sink_crc subcases fail after PSR is enabled in kernel

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=86684

--- Comment #4 from Rodrigo Vivi <rodrigo.vivi at gmail.com> ---
More info on the issue:

when PSR is active on pipe even before setting DP_TEST_SINK to start test and
start calculating CRC, there is already CRC being calculated at panel and count
is already bigger than 1.

Another strange thing is that TEST_CRC_COUNT is 1 at the very beginning even
when TEST_SINK is 0. Even forcing TEST_SINK to 0 TEST_CRC_COUNT is still 1. DP
1.2 tells TEST_CRC_COUNT reset to 0 when TEST_SINK bit 0 = 0. This logic works
pretty well when PSR is disabled. However when PSR is enabled I’m getting this
incorrect panel behavior.

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