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Message-ID: <d9dcb87b431aabe580db54624aa0754a479f7254.camel@mediatek.com>
Date: Fri, 14 Jun 2024 05:13:55 +0000
From: CK Hu (胡俊光) <ck.hu@...iatek.com>
To: Shawn Sung (宋孝謙) <Shawn.Sung@...iatek.com>,
"chunkuang.hu@...nel.org" <chunkuang.hu@...nel.org>
CC: "linux-mediatek@...ts.infradead.org" <linux-mediatek@...ts.infradead.org>,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
Bibby Hsieh (謝濟遠) <Bibby.Hsieh@...iatek.com>,
"jason-ch.chen@...iatek.corp-partner.google.com"
<jason-ch.chen@...iatek.corp-partner.google.com>,
Nancy Lin (林欣螢) <Nancy.Lin@...iatek.com>,
"daniel@...ll.ch" <daniel@...ll.ch>, "p.zabel@...gutronix.de"
<p.zabel@...gutronix.de>, "dri-devel@...ts.freedesktop.org"
<dri-devel@...ts.freedesktop.org>, "airlied@...il.com" <airlied@...il.com>,
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<linux-arm-kernel@...ts.infradead.org>,
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<angelogioacchino.delregno@...labora.com>
Subject: Re: [PATCH v9 15/21] drm/mediatek: Support "None" blending in Mixer
Hi, Shawn:
On Fri, 2024-06-14 at 10:46 +0800, Shawn Sung wrote:
> From: Hsiao Chien Sung <shawn.sung@...iatek.com>
>
> Support "None" alpha blending mode on MediaTek's chips.
Reviewed-by: CK Hu <ck.hu@...iatek.com>
>
> Signed-off-by: Hsiao Chien Sung <shawn.sung@...iatek.com>
> ---
> drivers/gpu/drm/mediatek/mtk_ethdr.c | 4 +++-
> 1 file changed, 3 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/mediatek/mtk_ethdr.c b/drivers/gpu/drm/mediatek/mtk_ethdr.c
> index 7eaafd44f320..907c0ed34c64 100644
> --- a/drivers/gpu/drm/mediatek/mtk_ethdr.c
> +++ b/drivers/gpu/drm/mediatek/mtk_ethdr.c
> @@ -3,6 +3,7 @@
> * Copyright (c) 2021 MediaTek Inc.
> */
>
> +#include <drm/drm_blend.h>
> #include <drm/drm_fourcc.h>
> #include <drm/drm_framebuffer.h>
> #include <linux/clk.h>
> @@ -175,7 +176,8 @@ void mtk_ethdr_layer_config(struct device *dev, unsigned int idx,
> alpha_con |= state->base.alpha & MIXER_ALPHA;
> }
>
> - if (state->base.fb && !state->base.fb->format->has_alpha) {
> + if ((state->base.fb && !state->base.fb->format->has_alpha) ||
> + state->base.pixel_blend_mode == DRM_MODE_BLEND_PIXEL_NONE) {
> /*
> * Mixer doesn't support CONST_BLD mode,
> * use a trick to make the output equivalent
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