linux-kernel - Re: [PATCH v2] drm/color: Document CTM eqations

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Message-ID: <CAPj87rPRD57-rkzTOm6jbcTaDp1dB-sSJPC=ewZRyVb5qoXGJg@mail.gmail.com>
Date:   Wed, 15 Feb 2017 11:56:55 +0000
From:   Daniel Stone <daniel@...ishbar.org>
To:     Ville Syrjälä <ville.syrjala@...ux.intel.com>
Cc:     Daniel Vetter <daniel.vetter@...ll.ch>,
        Brian Starkey <brian.starkey@....com>,
        dri-devel <dri-devel@...ts.freedesktop.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Jani Nikula <jani.nikula@...ux.intel.com>,
        Sean Paul <seanpaul@...omium.org>,
        Lionel Landwerlin <lionel.g.landwerlin@...el.com>
Subject: Re: [PATCH v2] drm/color: Document CTM eqations

Hi,

On 15 February 2017 at 11:39, Ville Syrjälä
<ville.syrjala@...ux.intel.com> wrote:
> On Tue, Jan 31, 2017 at 06:46:39PM +0100, Daniel Vetter wrote:
>> On Tue, Jan 31, 2017 at 6:22 PM, Ville Syrjälä
>> <ville.syrjala@...ux.intel.com> wrote:
>> > Hmm. Two's complement is what I was thinking it is. Which shows that
>> > I never managed to read the code in any detail. Definitely needs to
>> > be documented properly.
>>
>> That sounds supremely backwards. I guess we can't fix this anymore?
>
> I have no idea. Anyone else?

I don't know of any implementation using this; maybe closed Intel
Android stuff? Certainly GitHub showed no-one using it, and neither X
nor Weston/Mutter are using it yet.

Cheers,
Daniel