kms_frontbuffer_tracking: Skip on unreliable CRC.

Even with all sink crc re-works we still have platforms
where after 6 vblanks it is unable to calculate the
sink crc. But if we don't get the sink crc it isn't true
that test failed, but that we have no ways to say test
passed or failed.

So let's print a message and move forward in case sink crc
cannot help us to know if the screen has been updated.

v2: Also include a message on setup_sink_crc and also
only skip when it is mandatory, i.e. when running for PSR.

Acked-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
1 file changed