linux-kernel - Re: [PATCH v3 19/21] arm64: dts: mt8192: Add dsi node

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Date:   Tue, 15 Mar 2022 15:51:18 +0100
From:   AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>
To:     Allen-KH Cheng <allen-kh.cheng@...iatek.com>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski@...onical.com>
Cc:     Project_Global_Chrome_Upstream_Group@...iatek.com,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org, linux-mediatek@...ts.infradead.org,
        Chen-Yu Tsai <wenst@...omium.org>,
        Ryder Lee <ryder.lee@...nel.org>,
        Hui Liu <hui.liu@...iatek.com>
Subject: Re: [PATCH v3 19/21] arm64: dts: mt8192: Add dsi node

Il 04/03/22 14:08, Allen-KH Cheng ha scritto:
> Add dsi ndoe for mt8192 SoC.
> 
> Signed-off-by: Allen-KH Cheng <allen-kh.cheng@...iatek.com>
> ---
>   arch/arm64/boot/dts/mediatek/mt8192.dtsi | 14 ++++++++++++++
>   1 file changed, 14 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/mediatek/mt8192.dtsi b/arch/arm64/boot/dts/mediatek/mt8192.dtsi
> index 94f88e52776b..3d16cb0b3ea1 100644
> --- a/arch/arm64/boot/dts/mediatek/mt8192.dtsi
> +++ b/arch/arm64/boot/dts/mediatek/mt8192.dtsi
> @@ -1327,6 +1327,20 @@
>   			clocks = <&mmsys CLK_MM_DISP_DITHER0>;
>   		};
>   
> +		dsi0: dsi@...10000 {
> +			compatible = "mediatek,mt8183-dsi";
> +			reg = <0 0x14010000 0 0x1000>;
> +			interrupts = <GIC_SPI 265 IRQ_TYPE_LEVEL_HIGH 0>;
> +			mediatek,syscon-dsi = <&mmsys 0x140>;

mediatek,syscon-dsi does not exist upstream: here we have proper reset controller
support.

> +			clocks = <&mmsys CLK_MM_DSI0>,
> +				 <&mmsys CLK_MM_DSI_DSI0>,
> +				 <&mipi_tx0>;
> +			clock-names = "engine", "digital", "hs";
> +			phys = <&mipi_tx0>;
> +			phy-names = "dphy";

On MT8183, we do....
resets = <&mmsys MT8183_MMSYS_SW0_RST_B_DISP_DSI0>;

...so you need to simply replicate for MT8192. Please do.

> +			status = "disabled";
> +		};
> +
>   		ovl_2l2: ovl@...14000 {
>   			compatible = "mediatek,mt8192-disp-ovl-2l";
>   			reg = <0 0x14014000 0 0x1000>;