[Bug 104782] [CI] igt at kms_color@pipe-[abc]-*gamma - fail - CRC mismatch

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=104782

--- Comment #22 from Uma Shankar <uma.shankar at intel.com> ---
This is happening on ICL+ due to multi segmented gamma being enabled. Reason is
due to pipe roundup and interpolation, the crc values goes off and doesn't
match exactly. This results in the tests to fail, however this is expected and
no visual artifacts are observed. 

This matched in 10 bit gamma cases, because the precision was slightly low and
hence 2 input values which though not equal got same result after LUT lookup
due to interpolation (slightly different inputs yielded same value on lookup).
However with multi segmented gamma, we have more precision and higher number of
samples. The exact same input values got mapped to different values on LUT
lookup. This caused crc's to mismatch.

There is no functional issue, and we may have to re-design the test methodology
to avoid relying on crc matches for these tests.

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