linux-kernel - Re: [PATCH 5/5] arm64: dts: rockchip: rk3399-evb-ind: Add support for DisplayPort

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Message-ID: <91933881-e91e-4e3f-a027-1a28a30823ed@rock-chips.com>
Date: Wed, 16 Jul 2025 09:38:49 +0800
From: Chaoyi Chen <chaoyi.chen@...k-chips.com>
To: Krzysztof Kozlowski <krzk@...nel.org>, Chaoyi Chen <kernel@...kyi.com>,
 Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>,
 Conor Dooley <conor+dt@...nel.org>, Vinod Koul <vkoul@...nel.org>,
 Kishon Vijay Abraham I <kishon@...nel.org>, Heiko Stuebner
 <heiko@...ech.de>, Sandy Huang <hjc@...k-chips.com>,
 Andy Yan <andy.yan@...k-chips.com>,
 Yubing Zhang <yubing.zhang@...k-chips.com>,
 Frank Wang <frank.wang@...k-chips.com>,
 Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
 Maxime Ripard <mripard@...nel.org>, Thomas Zimmermann <tzimmermann@...e.de>,
 David Airlie <airlied@...il.com>, Simona Vetter <simona@...ll.ch>,
 Amit Sunil Dhamne <amitsd@...gle.com>,
 Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
 Dragan Simic <dsimic@...jaro.org>, Johan Jonker <jbx6244@...il.com>,
 Diederik de Haas <didi.debian@...ow.org>
Cc: devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
 linux-phy@...ts.infradead.org, linux-arm-kernel@...ts.infradead.org,
 linux-rockchip@...ts.infradead.org, dri-devel@...ts.freedesktop.org
Subject: Re: [PATCH 5/5] arm64: dts: rockchip: rk3399-evb-ind: Add support for
 DisplayPort

Hi Krzysztof,

On 2025/7/15 19:37, Krzysztof Kozlowski wrote:
> On 15/07/2025 13:24, Chaoyi Chen wrote:
>>   /dts-v1/;
>> +#include <dt-bindings/usb/pd.h>
>>   #include "rk3399.dtsi"
>>   
>>   / {
>> @@ -19,6 +20,16 @@ chosen {
>>   		stdout-path = "serial2:1500000n8";
>>   	};
>>   
>> +	vbus_typec: vbus-typec-regulator {
> use consistent naming. How other regulators are called? foo-regulator?

Will fix in v2.


>
>> +		compatible = "regulator-fixed";
>> +		enable-active-high;
>> +		gpio = <&gpio1 RK_PC2 GPIO_ACTIVE_HIGH>;
>> +		pinctrl-names = "default";
>> +		pinctrl-0 = <&vcc5v0_typec0_en>;
>> +		regulator-name = "vbus_typec";
>> +		vin-supply = <&vcc5v0_sys>;
>> +	};
>> +
>>   	vcc5v0_sys: regulator-vcc5v0-sys {
>>   		compatible = "regulator-fixed";
>>   		enable-active-high;
>> @@ -29,6 +40,16 @@ vcc5v0_sys: regulator-vcc5v0-sys {
>>   		regulator-max-microvolt = <5000000>;
>>   		regulator-min-microvolt = <5000000>;
>>   	};
>> +
>> +	sound: sound {
>> +		compatible = "rockchip,rk3399-gru-sound";
>> +		rockchip,cpu = <&i2s0 &spdif>;
>> +	};
>> +};
>> +
>> +&cdn_dp {
>> +	status = "okay";
>> +	phys = <&tcphy0_dp>;
>>   };
>>   
>>   &cpu_b0 {
>> @@ -341,6 +362,66 @@ regulator-state-mem {
>>   	};
>>   };
>>   
>> +&i2c4 {
>> +	i2c-scl-rising-time-ns = <475>;
>> +	i2c-scl-falling-time-ns = <26>;
>> +	status = "okay";
>> +
>> +	usbc0: fusb302@22 {
> Node names should be generic. See also an explanation and list of
> examples (not exhaustive) in DT specification:
> https://devicetree-specification.readthedocs.io/en/latest/chapter2-devicetree-basics.html#generic-names-recommendation

Thank you for the explanation. Will fix in v2.


>
>
>> +		compatible = "fcs,fusb302";
>> +		reg = <0x22>;
>> +		interrupt-parent = <&gpio1>;
>> +		interrupts = <RK_PA2 IRQ_TYPE_LEVEL_LOW>;
>> +		pinctrl-names = "default";
>> +		pinctrl-0 = <&usbc0_int>;
>> +		vbus-supply = <&vbus_typec>;
>> +		status = "okay";
> Why? What disabled it?

Oh, that is redundant. Will drop it in v2.


>
>> +
>> +		usb_con: connector {
>> +			compatible = "usb-c-connector";
>> +			label = "USB-C";
> Best regards,
> Krzysztof
>
>