linux-kernel - Re: [PATCH v3, 02/27] dt-bindings: mediatek: add ovl

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Message-ID: <20190709013717.GA26173@bogus>
Date:   Mon, 8 Jul 2019 19:37:17 -0600
From:   Rob Herring <robh@...nel.org>
To:     yongqiang.niu@...iatek.com
Cc:     CK Hu <ck.hu@...iatek.com>, Philipp Zabel <p.zabel@...gutronix.de>,
        Matthias Brugger <matthias.bgg@...il.com>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>,
        Mark Rutland <mark.rutland@....com>,
        dri-devel@...ts.freedesktop.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org
Subject: Re: [PATCH v3, 02/27] dt-bindings: mediatek: add ovl_2l description
 for mt8183 display

On Wed, Jun 05, 2019 at 07:42:41PM +0800, yongqiang.niu@...iatek.com wrote:
> From: Yongqiang Niu <yongqiang.niu@...iatek.com>
> 
> Update device tree binding documention for the display subsystem for
> Mediatek MT8183 SOCs
> 
> Signed-off-by: Yongqiang Niu <yongqiang.niu@...iatek.com>
> ---
>  Documentation/devicetree/bindings/display/mediatek/mediatek,disp.txt | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/Documentation/devicetree/bindings/display/mediatek/mediatek,disp.txt b/Documentation/devicetree/bindings/display/mediatek/mediatek,disp.txt
> index 70770fe..2418c56 100644
> --- a/Documentation/devicetree/bindings/display/mediatek/mediatek,disp.txt
> +++ b/Documentation/devicetree/bindings/display/mediatek/mediatek,disp.txt
> @@ -28,6 +28,7 @@ Documentation/devicetree/bindings/display/mediatek/mediatek,dpi.txt.
>  Required properties (all function blocks):
>  - compatible: "mediatek,<chip>-disp-<function>", one of
>  	"mediatek,<chip>-disp-ovl"   		- overlay (4 layers, blending, csc)
> +	"mediatek,<chip>-disp-ovl-2l"           - overlay (2 layers, blending, csc)

Does a single chip have a mixture of this block doing 2 and 4 layers? If 
not, the <chip> part implies 2 vs. 4 layers.

Rob