[PATCH] ARM: dts: imx6qdl: Adjust the brightness setting for LVDS panel

[Shawn Guo]

Add LAKML and a few interested people.

Shawn

On Tue, Jan 20, 2015 at 06:22:35PM +0800, Robby Cai wrote:
> Hannstar XGA panel is used by default on i.MX6QDL Sabre Auto/Lite/SD
> or derived board.
> 
> According to its data sheet [1],
> a) the dimming duty cycle is 20% - 100%.
> This patch changes the brightness-level from 20 to 100 with step 10 to
> make it straight-forward.
> b) the typical dimming frequency is 20KHz.
> The previous setting is 200Hz. This patch corrects it.
> 
> [1]
> http://boundarydevices.com/wp-content/uploads/2013/06/HSD100PXN1-A00-C11-1.0.pdf
> 
> Signed-off-by: Robby Cai <r63905 at freescale.com>
> ---
>  arch/arm/boot/dts/imx6qdl-gw52xx.dtsi     | 6 +++---
>  arch/arm/boot/dts/imx6qdl-gw53xx.dtsi     | 6 +++---
>  arch/arm/boot/dts/imx6qdl-gw54xx.dtsi     | 6 +++---
>  arch/arm/boot/dts/imx6qdl-nitrogen6x.dtsi | 6 +++---
>  arch/arm/boot/dts/imx6qdl-sabreauto.dtsi  | 6 +++---
>  arch/arm/boot/dts/imx6qdl-sabrelite.dtsi  | 6 +++---
>  arch/arm/boot/dts/imx6qdl-sabresd.dtsi    | 6 +++---
>  7 files changed, 21 insertions(+), 21 deletions(-)
> 
> diff --git a/arch/arm/boot/dts/imx6qdl-gw52xx.dtsi b/arch/arm/boot/dts/imx6qdl-gw52xx.dtsi
> index b5756c2..33484d8 100644
> --- a/arch/arm/boot/dts/imx6qdl-gw52xx.dtsi
> +++ b/arch/arm/boot/dts/imx6qdl-gw52xx.dtsi
> @@ -29,9 +29,9 @@
>  
>  	backlight {
>  		compatible = "pwm-backlight";
> -		pwms = <&pwm4 0 5000000>;
> -		brightness-levels = <0 4 8 16 32 64 128 255>;
> -		default-brightness-level = <7>;
> +		pwms = <&pwm4 0 50000>;
> +		brightness-levels = <0 20 30 40 50 60 70 80 90 100>;
> +		default-brightness-level = <9>;
>  	};
>  
>  	leds {
> diff --git a/arch/arm/boot/dts/imx6qdl-gw53xx.dtsi b/arch/arm/boot/dts/imx6qdl-gw53xx.dtsi
> index 86f03c1..0d01751 100644
> --- a/arch/arm/boot/dts/imx6qdl-gw53xx.dtsi
> +++ b/arch/arm/boot/dts/imx6qdl-gw53xx.dtsi
> @@ -30,9 +30,9 @@
>  
>  	backlight {
>  		compatible = "pwm-backlight";
> -		pwms = <&pwm4 0 5000000>;
> -		brightness-levels = <0 4 8 16 32 64 128 255>;
> -		default-brightness-level = <7>;
> +		pwms = <&pwm4 0 50000>;
> +		brightness-levels = <0 20 30 40 50 60 70 80 90 100>;
> +		default-brightness-level = <9>;
>  	};
>  
>  	leds {
> diff --git a/arch/arm/boot/dts/imx6qdl-gw54xx.dtsi b/arch/arm/boot/dts/imx6qdl-gw54xx.dtsi
> index 4a8d97f..8973bf2 100644
> --- a/arch/arm/boot/dts/imx6qdl-gw54xx.dtsi
> +++ b/arch/arm/boot/dts/imx6qdl-gw54xx.dtsi
> @@ -30,9 +30,9 @@
>  
>  	backlight {
>  		compatible = "pwm-backlight";
> -		pwms = <&pwm4 0 5000000>;
> -		brightness-levels = <0 4 8 16 32 64 128 255>;
> -		default-brightness-level = <7>;
> +		pwms = <&pwm4 0 50000>;
> +		brightness-levels = <0 20 30 40 50 60 70 80 90 100>;
> +		default-brightness-level = <9>;
>  	};
>  
>  	leds {
> diff --git a/arch/arm/boot/dts/imx6qdl-nitrogen6x.dtsi b/arch/arm/boot/dts/imx6qdl-nitrogen6x.dtsi
> index 0821812..5453cf0 100644
> --- a/arch/arm/boot/dts/imx6qdl-nitrogen6x.dtsi
> +++ b/arch/arm/boot/dts/imx6qdl-nitrogen6x.dtsi
> @@ -124,9 +124,9 @@
>  
>  	backlight_lvds {
>  		compatible = "pwm-backlight";
> -		pwms = <&pwm4 0 5000000>;
> -		brightness-levels = <0 4 8 16 32 64 128 255>;
> -		default-brightness-level = <7>;
> +		pwms = <&pwm4 0 50000>;
> +		brightness-levels = <0 20 30 40 50 60 70 80 90 100>;
> +		default-brightness-level = <9>;
>  		power-supply = <&reg_3p3v>;
>  		status = "okay";
>  	};
> diff --git a/arch/arm/boot/dts/imx6qdl-sabreauto.dtsi b/arch/arm/boot/dts/imx6qdl-sabreauto.dtsi
> index 009abd6..2bfcf5a 100644
> --- a/arch/arm/boot/dts/imx6qdl-sabreauto.dtsi
> +++ b/arch/arm/boot/dts/imx6qdl-sabreauto.dtsi
> @@ -38,9 +38,9 @@
>  
>  	backlight {
>  		compatible = "pwm-backlight";
> -		pwms = <&pwm3 0 5000000>;
> -		brightness-levels = <0 4 8 16 32 64 128 255>;
> -		default-brightness-level = <7>;
> +		pwms = <&pwm3 0 50000>;
> +		brightness-levels = <0 20 30 40 50 60 70 80 90 100>;
> +		default-brightness-level = <9>;
>  		status = "okay";
>  	};
>  };
> diff --git a/arch/arm/boot/dts/imx6qdl-sabrelite.dtsi b/arch/arm/boot/dts/imx6qdl-sabrelite.dtsi
> index 0b28a9d..d1409c0 100644
> --- a/arch/arm/boot/dts/imx6qdl-sabrelite.dtsi
> +++ b/arch/arm/boot/dts/imx6qdl-sabrelite.dtsi
> @@ -123,9 +123,9 @@
>  
>  	backlight_lvds {
>  		compatible = "pwm-backlight";
> -		pwms = <&pwm4 0 5000000>;
> -		brightness-levels = <0 4 8 16 32 64 128 255>;
> -		default-brightness-level = <7>;
> +		pwms = <&pwm4 0 50000>;
> +		brightness-levels = <0 20 30 40 50 60 70 80 90 100>;
> +		default-brightness-level = <9>;
>  		power-supply = <&reg_3p3v>;
>  		status = "okay";
>  	};
> diff --git a/arch/arm/boot/dts/imx6qdl-sabresd.dtsi b/arch/arm/boot/dts/imx6qdl-sabresd.dtsi
> index f1cd214..3efc363 100644
> --- a/arch/arm/boot/dts/imx6qdl-sabresd.dtsi
> +++ b/arch/arm/boot/dts/imx6qdl-sabresd.dtsi
> @@ -115,9 +115,9 @@
>  
>  	backlight {
>  		compatible = "pwm-backlight";
> -		pwms = <&pwm1 0 5000000>;
> -		brightness-levels = <0 4 8 16 32 64 128 255>;
> -		default-brightness-level = <7>;
> +		pwms = <&pwm1 0 50000>;
> +		brightness-levels = <0 20 30 40 50 60 70 80 90 100>;
> +		default-brightness-level = <9>;
>  		status = "okay";
>  	};
>  
> -- 
> 1.9.1
>