linux-kernel - Re: [PATCH v2 2/3] arm64: dts: nuvoton: ma35d1: add display controller support

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Message-ID: <a0910eb7-4597-45a7-b538-f2feb021f389@gmail.com>
Date: Fri, 6 Feb 2026 15:12:57 +0800
From: Joey Lu <a0987203069@...il.com>
To: Krzysztof Kozlowski <krzk@...nel.org>
Cc: airlied@...il.com, simona@...ll.ch, maarten.lankhorst@...ux.intel.com,
 mripard@...nel.org, tzimmermann@...e.de, robh@...nel.org,
 krzk+dt@...nel.org, conor+dt@...nel.org, ychuang3@...oton.com,
 schung@...oton.com, yclu4@...oton.com, linux-arm-kernel@...ts.infradead.org,
 dri-devel@...ts.freedesktop.org, devicetree@...r.kernel.org,
 linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 2/3] arm64: dts: nuvoton: ma35d1: add display
 controller support


On 2/5/2026 9:23 PM, Krzysztof Kozlowski wrote:
> On Thu, Jan 29, 2026 at 12:05:31PM +0800, Joey Lu wrote:
>>   &uart0 {
>> @@ -129,3 +165,23 @@ &uart16 {
>>   	pinctrl-0 = <&pinctrl_uart16>;
>>   	status = "okay";
>>   };
>> +
>> +&panel {
>> +	port {
>> +		panel_in: endpoint@0 {
>> +			remote-endpoint = <&dpi_out>;
>> +		};
>> +	};
>> +};
>> +
>> +&display {
> What sort of ordering rule is followed in Nuvoton? Why is it different
> than DTS coding style? Why do you choose other style?
>
>> +	pinctrl-names = "default";
>> +	pinctrl-0 = <&pinctrl_display>;
>> +	status = "okay";
>> +
>> +	port {
>> +		dpi_out: endpoint@0 {
>> +			remote-endpoint = <&panel_in>;
>> +		};
>> +	};
>> +};
>> diff --git a/arch/arm64/boot/dts/nuvoton/ma35d1.dtsi b/arch/arm64/boot/dts/nuvoton/ma35d1.dtsi
>> index e51b98f5bdce..7d9d077f12b2 100644
>> --- a/arch/arm64/boot/dts/nuvoton/ma35d1.dtsi
>> +++ b/arch/arm64/boot/dts/nuvoton/ma35d1.dtsi
>> @@ -379,5 +379,19 @@ uart16: serial@...80000 {
>>   			clocks = <&clk UART16_GATE>;
>>   			status = "disabled";
>>   		};
>> +
>> +		panel: panel {
> No, there is no way your SoC has a panel.
>
> Don't add fake stuff to your DTS.
>
> Best regards,
> Krzysztof

I'll move panel nodes out of dtsi into board dts.

Joey