linux-kernel - Re: [PATCH 4/4] arm64: dts: imx8mp: Add hdmi parallel audio interface node

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Message-ID: <aHp2jxNRPfYGUiUY@lizhi-Precision-Tower-5810>
Date: Fri, 18 Jul 2025 12:30:07 -0400
From: Frank Li <Frank.li@....com>
To: Shengjiu Wang <shengjiu.wang@....com>
Cc: andrzej.hajda@...el.com, neil.armstrong@...aro.org, rfoss@...nel.org,
	Laurent.pinchart@...asonboard.com, jonas@...boo.se,
	jernej.skrabec@...il.com, maarten.lankhorst@...ux.intel.com,
	mripard@...nel.org, tzimmermann@...e.de, airlied@...il.com,
	simona@...ll.ch, lumag@...nel.org, dianders@...omium.org,
	cristian.ciocaltea@...labora.com, luca.ceresoli@...tlin.com,
	dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
	victor.liu@....com, shawnguo@...nel.org, s.hauer@...gutronix.de,
	kernel@...gutronix.de, festevam@...il.com, imx@...ts.linux.dev,
	linux-arm-kernel@...ts.infradead.org, robh@...nel.org,
	krzk+dt@...nel.org, conor+dt@...nel.org, p.zabel@...gutronix.de,
	devicetree@...r.kernel.org, l.stach@...gutronix.de,
	shengjiu.wang@...il.com
Subject: Re: [PATCH 4/4] arm64: dts: imx8mp: Add hdmi parallel audio
 interface node

On Fri, Jul 18, 2025 at 06:11:50PM +0800, Shengjiu Wang wrote:
> The HDMI TX Parallel Audio Interface (HTX_PAI) is a digital module that
> acts as the bridge between the Audio Subsystem to the HDMI TX Controller.

Remove " a digital module that acts as the" is more straightforward.

>
> Correct the register map of hdmi_pvi, which is overlapped with the
> hdmi_pai device.

Shrink register map size of hdmi_pvi to avoid overlapped hdmi_pai device.

>
> Signed-off-by: Shengjiu Wang <shengjiu.wang@....com>
> ---
>  arch/arm64/boot/dts/freescale/imx8mp-evk.dts |  4 +++
>  arch/arm64/boot/dts/freescale/imx8mp.dtsi    | 26 +++++++++++++++++++-
>  2 files changed, 29 insertions(+), 1 deletion(-)
>
> diff --git a/arch/arm64/boot/dts/freescale/imx8mp-evk.dts b/arch/arm64/boot/dts/freescale/imx8mp-evk.dts
> index c0cc5611048e..cc9351a5bd65 100644
> --- a/arch/arm64/boot/dts/freescale/imx8mp-evk.dts
> +++ b/arch/arm64/boot/dts/freescale/imx8mp-evk.dts
> @@ -442,6 +442,10 @@ &flexcan2 {
>  	status = "disabled";/* can2 pin conflict with pdm */
>  };
>
> +&hdmi_pai {
> +	status = "okay";
> +};
> +
>  &hdmi_pvi {
>  	status = "okay";
>  };
> diff --git a/arch/arm64/boot/dts/freescale/imx8mp.dtsi b/arch/arm64/boot/dts/freescale/imx8mp.dtsi
> index bb24dba7338e..6e5a41f46309 100644
> --- a/arch/arm64/boot/dts/freescale/imx8mp.dtsi
> +++ b/arch/arm64/boot/dts/freescale/imx8mp.dtsi
> @@ -2063,7 +2063,7 @@ irqsteer_hdmi: interrupt-controller@...c2000 {
>
>  			hdmi_pvi: display-bridge@...c4000 {
>  				compatible = "fsl,imx8mp-hdmi-pvi";
> -				reg = <0x32fc4000 0x1000>;
> +				reg = <0x32fc4000 0x800>;
>  				interrupt-parent = <&irqsteer_hdmi>;
>  				interrupts = <12>;
>  				power-domains = <&hdmi_blk_ctrl IMX8MP_HDMIBLK_PD_PVI>;
> @@ -2089,6 +2089,22 @@ pvi_to_hdmi_tx: endpoint {
>  				};
>  			};
>
> +			hdmi_pai: hdmi@...c4800 {

commit message it is bridge device, maybe audio-bridge is good node name

Frank
> +				compatible = "fsl,imx8mp-hdmi-pai";
> +				reg = <0x32fc4800 0x800>;
> +				interrupt-parent = <&irqsteer_hdmi>;
> +				interrupts = <14>;
> +				power-domains = <&hdmi_blk_ctrl IMX8MP_HDMIBLK_PD_PAI>;
> +				status = "disabled";
> +
> +				port {
> +
> +					pai_to_hdmi_tx: endpoint {
> +						remote-endpoint = <&hdmi_tx_from_pai>;
> +					};
> +				};
> +			};
> +
>  			lcdif3: display-controller@...c6000 {
>  				compatible = "fsl,imx8mp-lcdif";
>  				reg = <0x32fc6000 0x1000>;
> @@ -2140,6 +2156,14 @@ port@1 {
>  						reg = <1>;
>  						/* Point endpoint to the HDMI connector */
>  					};
> +
> +					port@2 {
> +						reg = <2>;
> +
> +						hdmi_tx_from_pai: endpoint {
> +							remote-endpoint = <&pai_to_hdmi_tx>;
> +						};
> +					};
>  				};
>  			};
>
> --
> 2.34.1
>