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Date:   Fri, 17 Feb 2017 13:54:52 +0000
From:   Brian Starkey <>
To:     Daniel Stone <>
Cc:     Ville Syrjälä 
        Daniel Vetter <>,
        dri-devel <>,
        Linux Kernel Mailing List <>,
        Jani Nikula <>,
        Sean Paul <>,
        Lionel Landwerlin <>
Subject: Re: [PATCH v2] drm/color: Document CTM eqations

What's the verdict? We've got [1] which is about to become another
(driver) implementation - better to change before that merges than
after I guess.



On Wed, Feb 15, 2017 at 11:56:55AM +0000, Daniel Stone wrote:
>On 15 February 2017 at 11:39, Ville Syrjälä
><> 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
>>> <> 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.

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