[PATCH v3 4/4] drm/vc4: Add CTM support

[Eric Anholt]

Eric Anholt <eric at anholt.net> writes:

> [ Unknown signature status ]
> Stefan Schake <stschake at gmail.com> writes:
>
>> The hardware has a single block for applying a CTM prior to gamma lut.
>> It can be fed with pixels from one of our CRTC at a time and uses a
>> matrix with S0.9 scalars. Use private atomic state to reject attempts
>> from userland to apply CTM for more than one CRTC at a time and reject
>> matrices with scalars that we can't approximate without integer bits.
>>
>> Signed-off-by: Stefan Schake <stschake at gmail.com>
>> ---
>> v3: New in the series
>
> Patch 2-3 get my r-b, and I've sent Stefan a small series of fixups for
> the modeset locking as was patiently explained to me by danvet.  With
> that, it'll have my r-b, and hopefully danvet can confirm that it's what
> he meant :)

I've pushed 1-3, and danvet confirmed that the squash fixes looked good
to him.
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