[PATCH v3] Documentation: gpu: Mention the requirements for new properties

[Simon Ser]

On Tuesday, June 15th, 2021 at 12:16, Pekka Paalanen <ppaalanen at gmail.com> wrote:

> Good reminder about CRCs. CRCs have zero tolerance, so they are not
> useful for testing properties that have any leeway, are they?

IIRC, IGT's alpha blending test currently computes the CRC for all
possible roundings, then checks that the hw returns one of the
acceptable CRCs.

With more complex color management properties, this approach might not
be possible and write-back support in hw drivers would really help.