linux-kernel - Re: [PATCH v2 09/10] arm64: dts: imx943-evk: Add display support using IT6263

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Message-ID: <aHf5CisGvyHLWy3Y@lizhi-Precision-Tower-5810>
Date: Wed, 16 Jul 2025 15:10:02 -0400
From: Frank Li <Frank.li@....com>
To: Laurentiu Palcu <laurentiu.palcu@....nxp.com>
Cc: imx@...ts.linux.dev, Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>, Shawn Guo <shawnguo@...nel.org>,
	Sascha Hauer <s.hauer@...gutronix.de>,
	Pengutronix Kernel Team <kernel@...gutronix.de>,
	Fabio Estevam <festevam@...il.com>, dri-devel@...ts.freedesktop.org,
	devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 09/10] arm64: dts: imx943-evk: Add display support
 using IT6263

On Wed, Jul 16, 2025 at 11:15:13AM +0300, Laurentiu Palcu wrote:
> The ITE IT6263 based NXP LVDS to HDMI converter can be attached to the
> i.MX943 EVK board LVDS port using the mini-SAS connector.

Generally, attached devices should be overlay file. You'd better mention
it is default configuration for shipped EVK board in commit message.

>
> Signed-off-by: Laurentiu Palcu <laurentiu.palcu@....nxp.com>
> ---
>  arch/arm64/boot/dts/freescale/imx943-evk.dts | 123 +++++++++++++++++++
>  1 file changed, 123 insertions(+)
>
> diff --git a/arch/arm64/boot/dts/freescale/imx943-evk.dts b/arch/arm64/boot/dts/freescale/imx943-evk.dts
> index c8c3eff9df1a2..636913782f983 100644
> --- a/arch/arm64/boot/dts/freescale/imx943-evk.dts
> +++ b/arch/arm64/boot/dts/freescale/imx943-evk.dts
> @@ -125,6 +125,129 @@ memory@...00000 {
>  		reg = <0x0 0x80000000 0x0 0x80000000>;
>  		device_type = "memory";
>  	};
> +
> +	hdmi-connector {
> +		compatible = "hdmi-connector";
> +		label = "hdmi";
> +		type = "a";
> +
> +		port {
> +			hdmi_connector_in: endpoint {
> +				remote-endpoint = <&it6263_out>;
> +			};
> +		};
> +	};

Please run https://github.com/lznuaa/dt-format to keep all node correct
orderred i.mx943's dts file already keep order when upstream.

I remember hdmi-connector should before memory@...00000.

> +};
> +
> +&dcif {
> +	status = "okay";
> +};
> +
> +&ldb {
> +	assigned-clocks = <&scmi_clk IMX94_CLK_LDBPLL_VCO>,
> +			  <&scmi_clk IMX94_CLK_LDBPLL>;
> +	assigned-clock-rates = <4158000000>, <1039500000>;
> +	status = "okay";
> +
> +	ports {
> +		port@1 {
> +			reg = <1>;

reg = <1> already set in dtsi file. So needn't set again.

Frank
> +
> +			lvds_out: endpoint {
> +				remote-endpoint = <&it6263_in>;
> +			};
> +		};
> +	};
> +};
> +
> +&lpi2c3 {
> +	clock-frequency = <400000>;
> +	pinctrl-0 = <&pinctrl_lpi2c3>;
> +	pinctrl-names = "default";
> +	status = "okay";
> +
> +	pca9548_i2c3: i2c-mux@77 {
> +		compatible = "nxp,pca9548";
> +		reg = <0x77>;
> +		#address-cells = <1>;
> +		#size-cells = <0>;
> +
> +		i2c@0 {
> +			reg = <0>;
> +			#address-cells = <1>;
> +			#size-cells = <0>;
> +		};
> +
> +		i2c@1 {
> +			reg = <1>;
> +			#address-cells = <1>;
> +			#size-cells = <0>;
> +		};
> +
> +		i2c@2 {
> +			reg = <2>;
> +			#address-cells = <1>;
> +			#size-cells = <0>;
> +		};
> +
> +		i2c@3 {
> +			reg = <3>;
> +			#address-cells = <1>;
> +			#size-cells = <0>;
> +
> +			lvds-to-hdmi-bridge@4c {
> +				compatible = "ite,it6263";
> +				reg = <0x4c>;
> +				data-mapping = "jeida-24";
> +				reset-gpios = <&pcal6416_i2c3_u171 8 GPIO_ACTIVE_HIGH>;
> +
> +				ports {
> +					#address-cells = <1>;
> +					#size-cells = <0>;
> +
> +					port@0 {
> +						reg = <0>;
> +
> +						it6263_in: endpoint {
> +							remote-endpoint = <&lvds_out>;
> +						};
> +					};
> +
> +					port@2 {
> +						reg = <2>;
> +
> +						it6263_out: endpoint {
> +							remote-endpoint = <&hdmi_connector_in>;
> +						};
> +					};
> +				};
> +			};
> +		};
> +
> +		i2c@4 {
> +			reg = <4>;
> +			#address-cells = <1>;
> +			#size-cells = <0>;
> +		};
> +
> +		i2c@5 {
> +			reg = <5>;
> +			#address-cells = <1>;
> +			#size-cells = <0>;
> +		};
> +
> +		i2c@6 {
> +			reg = <6>;
> +			#address-cells = <1>;
> +			#size-cells = <0>;
> +		};
> +
> +		i2c@7 {
> +			reg = <7>;
> +			#address-cells = <1>;
> +			#size-cells = <0>;
> +		};
> +	};
>  };
>
>  &lpi2c3 {
> --
> 2.34.1
>