linux-kernel - Re: [PATCH v3 4/5] drm/mediatek: Support "Pre-multiplied" blending in Mixer

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Message-ID: <147231f5-7732-4400-9feb-f563c07dbc91@collabora.com>
Date: Wed, 10 Jul 2024 14:03:18 +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>
Subject: Re: [PATCH v3 4/5] drm/mediatek: Support "Pre-multiplied" blending in
 Mixer

Il 10/07/24 10:52, Hsiao Chien Sung via B4 Relay ha scritto:
> From: Hsiao Chien Sung <shawn.sung@...iatek.com>
> 
> Support "Pre-multiplied" alpha blending mode in Mixer.
> Before this patch, only the coverage mode is supported.
> 
> To replace the default setting that is set in mtk_ethdr_config(),
> we change mtk_ddp_write_mask() to mtk_ddp_write(), and this change will
> also reset the NON_PREMULTI_SOURCE bit that was assigned in
> mtk_ethdr_config(). Therefore, we must still set NON_PREMULTI_SOURCE bit
> if the blend mode is not DRM_MODE_BLEND_PREMULTI.
> 
> Signed-off-by: Hsiao Chien Sung <shawn.sung@...iatek.com>

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