[PATCH] arm64: dts: imx8mp-phyboard-pollux: Add HDMI support

[Yannic Moog]

On Tue, 2026-03-31 at 00:37 +0200, Paul Kocialkowski wrote:
> The PHYTEC phyBOARD Pollux comes with a HDMI port on the base board.
> Add the required device-tree nodes to enable support for it.

"Only" video is supported, but it does work. You could add that to the description since audio is
also supported upstream and part of HDMI.

Yannic

> 
> Signed-off-by: Paul Kocialkowski <paulk at sys-base.io>

Reviewed-by: Yannic Moog <y.moog at phytec.de>
Tested-by: Yannic Moog <y.moog at phytec.de>

> ---
>  .../freescale/imx8mp-phyboard-pollux-rdk.dts  | 47 +++++++++++++++++++
>  1 file changed, 47 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/freescale/imx8mp-phyboard-pollux-rdk.dts
> b/arch/arm64/boot/dts/freescale/imx8mp-phyboard-pollux-rdk.dts
> index 0fe52c73fc8f..0d52f29813f1 100644
> --- a/arch/arm64/boot/dts/freescale/imx8mp-phyboard-pollux-rdk.dts
> +++ b/arch/arm64/boot/dts/freescale/imx8mp-phyboard-pollux-rdk.dts
> @@ -38,6 +38,18 @@ fan0: fan {
>  		#cooling-cells = <2>;
>  	};
>  
> +	hdmi-connector {
> +		compatible = "hdmi-connector";
> +		label = "hdmi";
> +		type = "a";
> +
> +		port {
> +			hdmi_connector_in: endpoint {
> +				remote-endpoint = <&hdmi_tx_out>;
> +			};
> +		};
> +	};
> +
>  	panel_lvds1: panel-lvds1 {
>  		/* compatible panel in overlay */
>  		backlight = <&backlight_lvds1>;
> @@ -201,6 +213,28 @@ &flexcan2 {
>  	status = "okay";
>  };
>  
> +&hdmi_pvi {
> +	status = "okay";
> +};
> +
> +&hdmi_tx {
> +	pinctrl-names = "default";
> +	pinctrl-0 = <&pinctrl_hdmi>;
> +	status = "okay";
> +
> +	ports {
> +		port at 1 {
> +			hdmi_tx_out: endpoint {
> +				remote-endpoint = <&hdmi_connector_in>;
> +			};
> +		};
> +	};
> +};
> +
> +&hdmi_tx_phy {
> +	status = "okay";
> +};
> +
>  &i2c2 {
>  	clock-frequency = <400000>;
>  	pinctrl-names = "default", "gpio";
> @@ -244,6 +278,10 @@ &i2c3 {
>  	scl-gpios = <&gpio5 19 (GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN)>;
>  };
>  
> +&lcdif3 {
> +	status = "okay";
> +};
> +
>  &ldb_lvds_ch1 {
>  	remote-endpoint = <&panel1_in>;
>  };
> @@ -444,6 +482,15 @@ MX8MP_IOMUXC_SAI5_RXD0__GPIO3_IO21	0x154
>  		>;
>  	};
>  
> +	pinctrl_hdmi: hdmigrp {
> +		fsl,pins = <
> +			MX8MP_IOMUXC_HDMI_DDC_SCL__HDMIMIX_HDMI_SCL			0x1c3
> +			MX8MP_IOMUXC_HDMI_DDC_SDA__HDMIMIX_HDMI_SDA			0x1c3
> +			MX8MP_IOMUXC_HDMI_HPD__HDMIMIX_HDMI_HPD				0
> x19
> +			MX8MP_IOMUXC_HDMI_CEC__HDMIMIX_HDMI_CEC				0
> x19
> +		>;
> +	};
> +
>  	pinctrl_i2c2: i2c2grp {
>  		fsl,pins = <
>  			MX8MP_IOMUXC_I2C2_SCL__I2C2_SCL		0x400001c2