linux-kernel - Re: [PATCH v2 7/7] arm64: dts: rockchip: Enable DP2HDMI for ROCK 5 ITX

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Message-ID: <q3y36jgswj4xa2g3hnptc6kgzphbqfg675r5paa2lwvdseytio@jysj4f2i6osu>
Date: Wed, 12 Mar 2025 14:39:17 +0200
From: Dmitry Baryshkov <lumag@...nel.org>
To: Andy Yan <andyshrk@....com>
Cc: heiko@...ech.de, hjc@...k-chips.com, mripard@...nel.org, 
	cristian.ciocaltea@...labora.com, neil.armstrong@...aro.org, yubing.zhang@...k-chips.com, 
	krzk+dt@...nel.org, devicetree@...r.kernel.org, dri-devel@...ts.freedesktop.org, 
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org, linux-rockchip@...ts.infradead.org, 
	robh@...nel.org, sebastian.reichel@...labora.com, 
	Andy Yan <andy.yan@...k-chips.com>
Subject: Re: [PATCH v2 7/7] arm64: dts: rockchip: Enable DP2HDMI for ROCK 5
 ITX

On Wed, Mar 12, 2025 at 06:42:08PM +0800, Andy Yan wrote:
> From: Andy Yan <andy.yan@...k-chips.com>
> 
> The HDMI Port next to Headphone Jack is drived by
> DP1 on rk3588 via a dp2hdmi converter.
> 
> Add related dt nodes to enable it.
> 
> Note: ROCKCHIP_VOP2_EP_DP1 is defined as 11 in dt-binding header,
> but it will trigger a dtc warning like "graph node unit address
> error, expected "b"" if we use it directly after endpoint, so we
> use "b" instead here.
> 
> Signed-off-by: Andy Yan <andy.yan@...k-chips.com>
> ---
> 
> (no changes since v1)
> 
>  .../boot/dts/rockchip/rk3588-rock-5-itx.dts   | 37 +++++++++++++++++++
>  1 file changed, 37 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/rockchip/rk3588-rock-5-itx.dts b/arch/arm64/boot/dts/rockchip/rk3588-rock-5-itx.dts
> index 67b886329248..29f10ec9f0c1 100644
> --- a/arch/arm64/boot/dts/rockchip/rk3588-rock-5-itx.dts
> +++ b/arch/arm64/boot/dts/rockchip/rk3588-rock-5-itx.dts
> @@ -57,6 +57,18 @@ analog-sound {
>  			  "Headphone", "Headphones";
>  	};
>  
> +	dp-con {
> +		compatible = "dp-connector";

You've written that it is an HDMI connector. Could you possibly clarify,
why is it being registered as a DP connector? Is there any kind of
a bridge between the DP controller and the HDMI connector?

> +		label = "DP OUT";
> +		type = "full-size";
> +
> +		port {
> +			dp_con_in: endpoint {
> +				remote-endpoint = <&dp1_out_con>;
> +			};
> +		};
> +	};
> +
>  	gpio-leds {
>  		compatible = "gpio-leds";
>  		pinctrl-names = "default";
> @@ -268,6 +280,24 @@ &cpu_l3 {
>  	cpu-supply = <&vdd_cpu_lit_s0>;
>  };
>  
> +&dp1 {
> +	status = "okay";
> +	pinctrl-names = "default";
> +	pinctrl-0 = <&dp1m0_pins>;
> +};
> +
> +&dp1_in {
> +	dp1_in_vp2: endpoint {
> +		remote-endpoint = <&vp2_out_dp1>;
> +	};
> +};
> +
> +&dp1_out {
> +	dp1_out_con: endpoint {
> +		remote-endpoint = <&dp_con_in>;
> +	};
> +};
> +
>  &gpu {
>  	mali-supply = <&vdd_gpu_s0>;
>  	status = "okay";
> @@ -1262,3 +1292,10 @@ vp1_out_hdmi1: endpoint@...KCHIP_VOP2_EP_HDMI1 {
>  		remote-endpoint = <&hdmi1_in_vp1>;
>  	};
>  };
> +
> +&vp2 {
> +	vp2_out_dp1: endpoint@b {
> +		reg = <ROCKCHIP_VOP2_EP_DP1>;
> +		remote-endpoint = <&dp1_in_vp2>;
> +	};
> +};
> -- 
> 2.34.1
> 

-- 
With best wishes
Dmitry