linux-kernel - Re: [PATCH v1 1/8] ARM: dts: imx6qdl-vicut1/vicutgo: Set default backlight brightness to maximum

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Message-ID: <20220406012348.GE129381@dragon>
Date:   Wed, 6 Apr 2022 09:23:48 +0800
From:   Shawn Guo <shawnguo@...nel.org>
To:     Oleksij Rempel <o.rempel@...gutronix.de>
Cc:     Mark Rutland <mark.rutland@....com>,
        Rob Herring <robh+dt@...nel.org>,
        Sascha Hauer <s.hauer@...gutronix.de>,
        Thierry Reding <thierry.reding@...il.com>,
        Sam Ravnborg <sam@...nborg.org>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>,
        David Jander <david@...tonic.nl>, devicetree@...r.kernel.org,
        Fabio Estevam <festevam@...il.com>,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        NXP Linux Team <linux-imx@....com>,
        Pengutronix Kernel Team <kernel@...gutronix.de>,
        Robin van der Gracht <robin@...tonic.nl>,
        dri-devel@...ts.freedesktop.org
Subject: Re: [PATCH v1 1/8] ARM: dts: imx6qdl-vicut1/vicutgo: Set default
 backlight brightness to maximum

On Mon, Feb 21, 2022 at 10:53:05AM +0100, Oleksij Rempel wrote:
> From: David Jander <david@...tonic.nl>
> 
> Recover default behavior of the device and set maximal brightness
> 
> Signed-off-by: David Jander <david@...tonic.nl>
> Signed-off-by: Oleksij Rempel <o.rempel@...gutronix.de>
> ---
>  arch/arm/boot/dts/imx6dl-victgo.dts   | 2 +-
>  arch/arm/boot/dts/imx6qdl-vicut1.dtsi | 2 +-
>  2 files changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/arch/arm/boot/dts/imx6dl-victgo.dts b/arch/arm/boot/dts/imx6dl-victgo.dts
> index 227c952543d4..e6134efbfabd 100644
> --- a/arch/arm/boot/dts/imx6dl-victgo.dts
> +++ b/arch/arm/boot/dts/imx6dl-victgo.dts
> @@ -28,7 +28,7 @@ backlight: backlight {
>  		pwms = <&pwm1 0 5000000 0>;
>  		brightness-levels = <0 16 64 255>;
>  		num-interpolated-steps = <16>;
> -		default-brightness-level = <1>;
> +		default-brightness-level = <48>;

Please take a look at the documentation of the property.

  default-brightness-level:
    description:
      The default brightness level (index into the array defined by the
      "brightness-levels" property).

Shawn

>  		power-supply = <&reg_3v3>;
>  		enable-gpios = <&gpio4 28 GPIO_ACTIVE_HIGH>;
>  	};
> diff --git a/arch/arm/boot/dts/imx6qdl-vicut1.dtsi b/arch/arm/boot/dts/imx6qdl-vicut1.dtsi
> index 1ac7e13249d2..c1d06bc28c67 100644
> --- a/arch/arm/boot/dts/imx6qdl-vicut1.dtsi
> +++ b/arch/arm/boot/dts/imx6qdl-vicut1.dtsi
> @@ -23,7 +23,7 @@ backlight: backlight {
>  		pwms = <&pwm1 0 5000000 0>;
>  		brightness-levels = <0 16 64 255>;
>  		num-interpolated-steps = <16>;
> -		default-brightness-level = <1>;
> +		default-brightness-level = <48>;
>  		power-supply = <&reg_3v3>;
>  		enable-gpios = <&gpio4 28 GPIO_ACTIVE_HIGH>;
>  	};
> -- 
> 2.30.2
>