From: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
To: Yongqiang Niu <yongqiang.niu@mediatek.com>,
Chun-Kuang Hu <chunkuang.hu@kernel.org>
Cc: Rob Herring <robh+dt@kernel.org>,
Matthias Brugger <matthias.bgg@gmail.com>,
Philipp Zabel <p.zabel@pengutronix.de>,
David Airlie <airlied@linux.ie>, Daniel Vetter <daniel@ffwll.ch>,
Jassi Brar <jassisinghbrar@gmail.com>,
Fabien Parent <fparent@baylibre.com>,
Dennis YC Hsieh <dennis-yc.hsieh@mediatek.com>,
devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
linux-mediatek@lists.infradead.org, linux-kernel@vger.kernel.org,
dri-devel@lists.freedesktop.org,
Project_Global_Chrome_Upstream_Group@mediatek.com,
Hsin-Yi Wang <hsinyi@chromium.org>,
Yongqiang Niu <yongqiang.niu@mediatek.corp-partner.google.com>
Subject: Re: [PATCH v4, 1/1] drm/mediatek: add lut diff flag for new gamma hardware support
Date: Thu, 28 Apr 2022 15:19:44 +0200 [thread overview]
Message-ID: <88ddf1ba-9395-cd40-53f5-25d1d2f9ef9e@collabora.com> (raw)
In-Reply-To: <20220428085829.15855-2-yongqiang.niu@mediatek.com>
Il 28/04/22 10:58, Yongqiang Niu ha scritto:
> From: Yongqiang Niu <yongqiang.niu@mediatek.corp-partner.google.com>
>
> mt8183 gamma module usage is different with before soc,
> gamma odd(index start from 0) lut value set to hardware
> register should be
> the difference of current lut value with last lut value.
>
> for example, chrome os user space set lut
> like this(only r chanel for example):
> 2 4 6 8 10 12.
> 1) mt8183 gamma driver should set the gamma lut to hardware
> register like this:
> 2 [2] 6 [2] 10 [2]
> the value with [] is the difference value
> 2)gamma hardware process display data with original lut
>
> Signed-off-by: Yongqiang Niu <yongqiang.niu@mediatek.com>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
next prev parent reply other threads:[~2022-04-28 13:19 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-04-28 8:58 [PATCH v4, 0/1] drm/mediatek: add lut diff flag for new gamma hardware Yongqiang Niu
2022-04-28 8:58 ` [PATCH v4, 1/1] drm/mediatek: add lut diff flag for new gamma hardware support Yongqiang Niu
2022-04-28 13:19 ` AngeloGioacchino Del Regno [this message]
2022-04-29 2:21 ` CK Hu
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