Re: [PATCH] arm64: dts: renesas: r8a77995: draak: Set better backlight levels

[Simon Horman <horms@xxxxxxxxxxxx>]

On Sun, Dec 16, 2018 at 01:32:17PM +0200, Laurent Pinchart wrote:
> The backlight levels provided in the Draak DT produce a perceived
> brightness very biased towards high brightness. Use better brightness
> levels based on the CIE 1931 formula.
> 
> Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@xxxxxxxxxxxxxxxx>

I would value a review of this patch.

> ---
>  arch/arm64/boot/dts/renesas/r8a77995-draak.dts | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/arch/arm64/boot/dts/renesas/r8a77995-draak.dts b/arch/arm64/boot/dts/renesas/r8a77995-draak.dts
> index cd067319e6f3..7970459192ac 100644
> --- a/arch/arm64/boot/dts/renesas/r8a77995-draak.dts
> +++ b/arch/arm64/boot/dts/renesas/r8a77995-draak.dts
> @@ -28,8 +28,8 @@
>  		compatible = "pwm-backlight";
>  		pwms = <&pwm1 0 50000>;
>  
> -		brightness-levels = <256 128 64 16 8 4 0>;
> -		default-brightness-level = <6>;
> +		brightness-levels = <512 511 505 494 473 440 392 327 241 133 0>;
> +		default-brightness-level = <10>;
>  
>  		power-supply = <&reg_12p0v>;
>  		enable-gpios = <&gpio4 0 GPIO_ACTIVE_HIGH>;
> -- 
> Regards,
> 
> Laurent Pinchart
>