linux-kernel - Re: [PATCH v10 5/6] arm64: dts: allwinner: a64: Add MIPI DSI pipeline

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Date:   Mon, 7 Oct 2019 12:57:08 +0200
From:   Maxime Ripard <mripard@...nel.org>
To:     Jagan Teki <jagan@...rulasolutions.com>
Cc:     Chen-Yu Tsai <wens@...e.org>, David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        michael@...rulasolutions.com, Icenowy Zheng <icenowy@...c.io>,
        linux-sunxi <linux-sunxi@...glegroups.com>,
        dri-devel@...ts.freedesktop.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        devicetree@...r.kernel.org
Subject: Re: [PATCH v10 5/6] arm64: dts: allwinner: a64: Add MIPI DSI pipeline

On Sat, Oct 05, 2019 at 07:49:12PM +0530, Jagan Teki wrote:
> Add MIPI DSI pipeline for Allwinner A64.
>
> - dsi node, with A64 compatible since it doesn't support
>   DSI_SCLK gating unlike A33
> - dphy node, with A64 compatible with A33 fallback since
>   DPHY on A64 and A33 is similar
> - finally, attach the dsi_in to tcon0 for complete MIPI DSI
>
> Signed-off-by: Jagan Teki <jagan@...rulasolutions.com>
> Tested-by: Merlijn Wajer <merlijn@...zup.org>
> ---
>  arch/arm64/boot/dts/allwinner/sun50i-a64.dtsi | 38 +++++++++++++++++++
>  1 file changed, 38 insertions(+)
>
> diff --git a/arch/arm64/boot/dts/allwinner/sun50i-a64.dtsi b/arch/arm64/boot/dts/allwinner/sun50i-a64.dtsi
> index 69128a6dfc46..ad4170b8aee0 100644
> --- a/arch/arm64/boot/dts/allwinner/sun50i-a64.dtsi
> +++ b/arch/arm64/boot/dts/allwinner/sun50i-a64.dtsi
> @@ -382,6 +382,12 @@
>  					#address-cells = <1>;
>  					#size-cells = <0>;
>  					reg = <1>;
> +
> +					tcon0_out_dsi: endpoint@1 {
> +						reg = <1>;
> +						remote-endpoint = <&dsi_in_tcon0>;
> +						allwinner,tcon-channel = <1>;
> +					};
>  				};
>  			};
>  		};
> @@ -1003,6 +1009,38 @@
>  			status = "disabled";
>  		};
>
> +		dsi: dsi@...0000 {
> +			compatible = "allwinner,sun50i-a64-mipi-dsi";
> +			reg = <0x01ca0000 0x1000>;
> +			interrupts = <GIC_SPI 89 IRQ_TYPE_LEVEL_HIGH>;
> +			clocks = <&ccu CLK_BUS_MIPI_DSI>;
> +			clock-names = "bus";

This won't validate with the bindings you have either here, since it
still expects bus and mod.

I guess in that cas, we can just drop clock-names, which will require
a bit of work on the driver side as well.

Maxime

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