linux-kernel - Re: [PATCH] arm64: dts: mt8183: jacuzzi: Fix bus properties in anx's DSI endpoint

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Date:   Fri, 21 Jan 2022 12:46:17 +0100
From:   AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>
To:     Nícolas F. R. A. Prado 
        <nfraprado@...labora.com>, Rob Herring <robh+dt@...nel.org>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Robert Foss <robert.foss@...aro.org>,
        Xin Ji <xji@...logixsemi.com>
Cc:     devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org, linux-kernel@...r.kernel.org,
        kernel@...labora.com
Subject: Re: [PATCH] arm64: dts: mt8183: jacuzzi: Fix bus properties in anx's
 DSI endpoint

Il 20/01/22 23:42, Nícolas F. R. A. Prado ha scritto:
> mt8183-kukui-jacuzzi has an anx7625 bridge connected to the output of
> its DSI host. However, after fd0310b6fe7d ("drm/bridge: anx7625: add
> MIPI DPI input feature"), a bus-type property started being required in
> the endpoint node by the driver to indicate whether it is DSI or DPI.
> 
> Add the missing bus-type property and set it to 5
> (V4L2_FWNODE_BUS_TYPE_PARALLEL) so that the driver has its input
> configured to DSI and the display pipeline can probe correctly.
> 
> While at it, also set the data-lanes property that was also introduced
> in that same commit, so that we don't rely on the default value.
> 
> Fixes: fd0310b6fe7d ("drm/bridge: anx7625: add MIPI DPI input feature")
> Signed-off-by: Nícolas F. R. A. Prado <nfraprado@...labora.com>

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

> ---
>   arch/arm64/boot/dts/mediatek/mt8183-kukui-jacuzzi.dtsi | 2 ++
>   1 file changed, 2 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/mediatek/mt8183-kukui-jacuzzi.dtsi b/arch/arm64/boot/dts/mediatek/mt8183-kukui-jacuzzi.dtsi
> index 8f7bf33f607d..e8f133dc96b9 100644
> --- a/arch/arm64/boot/dts/mediatek/mt8183-kukui-jacuzzi.dtsi
> +++ b/arch/arm64/boot/dts/mediatek/mt8183-kukui-jacuzzi.dtsi
> @@ -171,6 +171,8 @@ port@0 {
>   
>   			anx7625_in: endpoint {
>   				remote-endpoint = <&dsi_out>;
> +				bus-type = <5>;
> +				data-lanes = <0 1 2 3>;
>   			};
>   		};
>   
>