linux-kernel - Re: [PATCH RESEND v3 0/9] Add gamma lut support for mt8195

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Date:   Fri, 28 Apr 2023 06:45:32 +0000
From:   Jason-JH Lin (林睿祥) 
        <Jason-JH.Lin@...iatek.com>
To:     "matthias.bgg@...il.com" <matthias.bgg@...il.com>,
        "angelogioacchino.delregno@...labora.com" 
        <angelogioacchino.delregno@...labora.com>,
        "chunkuang.hu@...nel.org" <chunkuang.hu@...nel.org>,
        "robh+dt@...nel.org" <robh+dt@...nel.org>,
        "krzysztof.kozlowski+dt@...aro.org" 
        <krzysztof.kozlowski+dt@...aro.org>
CC:     "linux-mediatek@...ts.infradead.org" 
        <linux-mediatek@...ts.infradead.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Singo Chang (張興國) 
        <Singo.Chang@...iatek.com>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        CK Hu (胡俊光) <ck.hu@...iatek.com>,
        "dri-devel@...ts.freedesktop.org" <dri-devel@...ts.freedesktop.org>,
        Project_Global_Chrome_Upstream_Group 
        <Project_Global_Chrome_Upstream_Group@...iatek.com>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        Rex-BC Chen (陳柏辰) 
        <Rex-BC.Chen@...iatek.com>
Subject: Re: [PATCH RESEND v3 0/9] Add gamma lut support for mt8195

Hi Angelo,


On Thu, 2023-04-27 at 17:15 +0200, AngeloGioacchino Del Regno wrote:
> External email : Please do not click links or open attachments until
> you have verified the sender or the content.
> 
> 
> Il 26/04/23 13:43, AngeloGioacchino Del Regno ha scritto:
> > Il 12/09/22 03:29, Jason-JH.Lin ha scritto:
> > > Since the gamma_set_common() function for previous SoC,
> > > such as  mt8173 and mt8183, is designed for 9bit-to-10bit
> > > conversion.
> > > mt8195 is using 10bit-to-12bit conversion, which is
> > > not compatible with the previous function.
> > > 
> > > Thus, need to update the function to fit the need of mt8195.
> > 
> > Hello,
> > can you please respin and fix this series on the latest linux-next?
> > 
> > Besides, please test it carefully: as far as I can see, GNOME Night
> > Light
> > (or others) are not working on MT8195 (color temperature/ccorr).
> > As for gamma itself, that's not working either; you can test it
> > with a tool
> > that will create a color profile by applying a new VCGT table,
> > please look
> > at [1] if you need tools.
> > 
> > We can confirm that color correction works on at least MT8192
> > (colord), so
> > it's MT8195 at fault.
> > 
> > [1]: 
> > https://urldefense.com/v3/__https://github.com/zb3/gnome-gamma-tool__;!!CTRNKA9wMg0ARbw!ib5vs_mqKWlyC8VbLNZbc4Fc0-e6dL5Z-OM5pLsVRnQOWAckR6ETV1mRYRkz-5rKB7fdYvY4LrYoHKDlv6jPSKzoC-245JTYaQ$
> > 
> 
> Nevermind. I've actually fixed this code and refactored it a bit as
> well.
> 
> I'll push my own version soon. No action required.
> 
> Regards,
> Angelo
> 

OK~
Thanks for your great help! :)

Regards,
Jason-JH.Lin