linux-kernel - Re: [PATCH v4 3/5] drm/mediatek: Support "Pre-multiplied" blending in OVL

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Message-ID: <7d942686-e6cd-43c5-8bd0-7dcb93d691e6@collabora.com>
Date: Wed, 17 Jul 2024 15:49:44 +0200
From: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>
To: shawn.sung@...iatek.com, Chun-Kuang Hu <chunkuang.hu@...nel.org>,
 Philipp Zabel <p.zabel@...gutronix.de>, David Airlie <airlied@...il.com>,
 Daniel Vetter <daniel@...ll.ch>, Matthias Brugger <matthias.bgg@...il.com>
Cc: dri-devel@...ts.freedesktop.org, linux-mediatek@...ts.infradead.org,
 linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
 Hsiao Chien Sung <shawn.sung@...iatek.corp-partner.google.com>,
 CK Hu <ck.hu@...iatek.com>
Subject: Re: [PATCH v4 3/5] drm/mediatek: Support "Pre-multiplied" blending in
 OVL

Il 17/07/24 07:24, Hsiao Chien Sung via B4 Relay ha scritto:
> From: Hsiao Chien Sung <shawn.sung@...iatek.com>
> 
> Support "Pre-multiplied" alpha blending mode on in OVL.
> Before this patch, only the "coverage" mode is supported.
> 
> As whether OVL_CON_CLRFMT_MAN bit is enabled, (3 << 12)
> means different formats in the datasheet. To prevent
> misunderstandings going forward, instead of reusing
> OVL_CON_CLRFMT_RGBA8888, we intetionally defined
> OVL_CON_CLRFMT_PARGB8888 with bit operation again.
> 
> Reviewed-by: CK Hu <ck.hu@...iatek.com>
> Signed-off-by: Hsiao Chien Sung <shawn.sung@...iatek.com>

Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>