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

From: Paul Kocialkowski <[email-masked]>
Date: Thu, 2 Apr 2026 18:12:44 +0200

Hi Yannic,

On Wed 01 Apr 26, 12:06, Yannic Moog wrote:
> 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.

You're right, I didn't think about the audio part.
I'll add it in the next iteration.

All the best,

Paul
 
> Yannic
> 
> > 
> > Signed-off-by: Paul Kocialkowski <[email-masked]>
> 
> Reviewed-by: Yannic Moog <[email-masked]>
> Tested-by: Yannic Moog <[email-masked]>
> 
> > ---
> >  .../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@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

-- 
Paul Kocialkowski,

Independent contractor - sys-base - https://www.sys-base.io/
Free software developer - https://www.paulk.fr/

Expert in multimedia, graphics and embedded hardware support with Linux.