linux-kernel - Re: [PATCH 4/4] arm64: dts: rk3399-pinephone-pro: Add internal display support

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Message-ID: <a73d99fb-0d47-ad93-27e2-9b51dba4b824@linaro.org>
Date:   Fri, 23 Dec 2022 09:13:32 +0100
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Javier Martinez Canillas <javierm@...hat.com>,
        linux-kernel@...r.kernel.org
Cc:     Ondrej Jirman <megi@....cz>, Robert Mader <robert.mader@...teo.de>,
        Peter Robinson <pbrobinson@...il.com>,
        Kamil Trzciński <ayufan@...fan.eu>,
        Martijn Braam <martijn@...xit.nl>,
        Caleb Connolly <kc@...tmarketos.org>,
        Heiko Stuebner <heiko@...ech.de>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Rob Herring <robh+dt@...nel.org>,
        Tom Fitzhenry <tom@...-fitzhenry.me.uk>,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-rockchip@...ts.infradead.org
Subject: Re: [PATCH 4/4] arm64: dts: rk3399-pinephone-pro: Add internal
 display support

On 22/12/2022 23:38, Javier Martinez Canillas wrote:
> From: Ondrej Jirman <megi@....cz>
> 
> The phone's display is using Hannstar LCD panel, and Goodix based
> touchscreen. Support it.
> 
> Signed-off-by: Ondrej Jirman <megi@....cz>
> Co-developed-by: Martijn Braam <martijn@...xit.nl>
> Signed-off-by: Martijn Braam <martijn@...xit.nl>
> Co-developed-by: Kamil Trzciński <ayufan@...fan.eu>
> Signed-off-by: Kamil Trzciński <ayufan@...fan.eu>
> Signed-off-by: Javier Martinez Canillas <javierm@...hat.com>
> ---
> 
>  .../dts/rockchip/rk3399-pinephone-pro.dts     | 124 ++++++++++++++++++
>  1 file changed, 124 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/rockchip/rk3399-pinephone-pro.dts b/arch/arm64/boot/dts/rockchip/rk3399-pinephone-pro.dts
> index 0e4442b59a55..a0439a60395e 100644
> --- a/arch/arm64/boot/dts/rockchip/rk3399-pinephone-pro.dts
> +++ b/arch/arm64/boot/dts/rockchip/rk3399-pinephone-pro.dts
> @@ -29,6 +29,12 @@ chosen {
>  		stdout-path = "serial2:1500000n8";
>  	};
>  
> +	backlight: backlight {
> +		compatible = "pwm-backlight";
> +		pwms = <&pwm0 0 1000000 0>;
> +		pwm-delay-us = <10000>;
> +	};
> +
>  	gpio-keys {
>  		compatible = "gpio-keys";
>  		pinctrl-names = "default";
> @@ -81,6 +87,32 @@ vcc1v8_codec: vcc1v8-codec-regulator {
>  		regulator-max-microvolt = <1800000>;
>  		vin-supply = <&vcc3v3_sys>;
>  	};
> +
> +	/* MIPI DSI panel 1.8v supply */
> +	vcc1v8_lcd: vcc1v8-lcd {

Node names should be generic, so regulator suffix or prefix (looks like
other nodes already use suffix)

https://devicetree-specification.readthedocs.io/en/latest/chapter2-devicetree-basics.html#generic-names-recommendation

> +		compatible = "regulator-fixed";
> +		enable-active-high;
> +		regulator-name = "vcc1v8_lcd";
> +		regulator-min-microvolt = <1800000>;
> +		regulator-max-microvolt = <1800000>;
> +		vin-supply = <&vcc3v3_sys>;
> +		gpio = <&gpio3 RK_PA5 GPIO_ACTIVE_HIGH>;
> +		pinctrl-names = "default";
> +		pinctrl-0 = <&display_pwren1>;
> +	};
> +
> +	/* MIPI DSI panel 2.8v supply */
> +	vcc2v8_lcd: vcc2v8-lcd {

Node names should be generic.
https://devicetree-specification.readthedocs.io/en/latest/chapter2-devicetree-basics.html#generic-names-recommendation

Best regards,
Krzysztof