linux-kernel - Re: [PATCH RESEND v6 04/11] drm/mediatek: gamma: Improve and simplify HW LUT calculation

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Message-ID: <06162f85-bb38-d07a-38f6-e7303c80996c@baylibre.com>
Date:   Fri, 28 Jul 2023 15:00:42 +0200
From:   Alexandre Mergnat <amergnat@...libre.com>
To:     AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>, chunkuang.hu@...nel.org
Cc:     p.zabel@...gutronix.de, airlied@...il.com, daniel@...ll.ch,
        matthias.bgg@...il.com, dri-devel@...ts.freedesktop.org,
        linux-mediatek@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, wenst@...omium.org,
        kernel@...labora.com, ehristev@...labora.com,
        "Jason-JH . Lin" <jason-jh.lin@...iatek.com>
Subject: Re: [PATCH RESEND v6 04/11] drm/mediatek: gamma: Improve and simplify
 HW LUT calculation

Reviewed-by: Alexandre Mergnat <amergnat@...libre.com>

On 27/07/2023 11:46, AngeloGioacchino Del Regno wrote:
> Use drm_color_lut_extract() to avoid open-coding the bits reduction
> calculations for each color channel and use a struct drm_color_lut
> to temporarily store the information instead of an array of u32.
> 
> Also, slightly improve the precision of the HW LUT calculation in the
> LUT DIFF case by performing the subtractions on the 16-bits values and
> doing the 10 bits conversion later.

-- 
Regards,
Alexandre