lib/igt_frame: Add support for analog frame comparison testing

This adds support for analog frame comparison check, as used in VGA.
Since VGA uses a DAC-ADC chain, its data cannot be expected to be pixel
perfect. Thus, it is impossible to uses a CRC check and full frames have
to be analyzed instead. Such an analysis is implemented, based on both
an absolute error threshold and a correlation with the expected error
trend for a DAC-ADC chain. It was tested with a couple encoders and
provides reliable error detection with few false positives.

Signed-off-by: Paul Kocialkowski <paul.kocialkowski@linux.intel.com>
Reviewed-by: Lyude <lyude@redhat.com>

0 files changed, 0 insertions, 0 deletions