Re: [PATCH v7 12/13] arm64: dts: sun50i-a64-pinephone: Enable LCD support on PinePhone

[Maxime Ripard]

On Wed, Jul 01, 2020 at 06:29:27PM +0200, Ondrej Jirman wrote:
> From: Icenowy Zheng <icen...@aosc.io>
> 
> PinePhone uses PWM backlight and a XBD599 LCD panel over DSI for
> display.
> 
> Backlight levels curve was optimized by Martijn Braam using a
> lux meter.
> 
> Add its device nodes.
> 
> Signed-off-by: Icenowy Zheng <icen...@aosc.io>
> Signed-off-by: Martijn Braam <mart...@brixit.nl>
> Signed-off-by: Ondrej Jirman <meg...@megous.com>
> Acked-by: Linus Walleij <linus.wall...@linaro.org>
> ---
>  .../allwinner/sun50i-a64-pinephone-1.1.dts    | 19 ++++++++++
>  .../dts/allwinner/sun50i-a64-pinephone.dtsi   | 35 +++++++++++++++++++
>  2 files changed, 54 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/allwinner/sun50i-a64-pinephone-1.1.dts 
> b/arch/arm64/boot/dts/allwinner/sun50i-a64-pinephone-1.1.dts
> index 06a775c41664..3e99a87e9ce5 100644
> --- a/arch/arm64/boot/dts/allwinner/sun50i-a64-pinephone-1.1.dts
> +++ b/arch/arm64/boot/dts/allwinner/sun50i-a64-pinephone-1.1.dts
> @@ -9,3 +9,22 @@ / {
>       model = "Pine64 PinePhone Braveheart (1.1)";
>       compatible = "pine64,pinephone-1.1", "allwinner,sun50i-a64";
>  };
> +
> +&backlight {
> +     power-supply = <&reg_ldo_io0>;
> +     /*
> +      * PWM backlight circuit on this PinePhone revision was changed since
> +      * 1.0, and the lowest PWM duty cycle that doesn't lead to backlight
> +      * being off is around 20%. Duty cycle for the lowest brightness level
> +      * also varries quite a bit between individual boards, so the lowest
> +      * value here was chosen as a safe default.
> +      */
> +     brightness-levels = <
> +             774  793  814  842
> +             882  935  1003 1088
> +             1192 1316 1462 1633
> +             1830 2054 2309 2596
> +             2916 3271 3664 4096>;
> +     num-interpolated-steps = <50>;
> +     default-brightness-level = <400>;
> +};
> diff --git a/arch/arm64/boot/dts/allwinner/sun50i-a64-pinephone.dtsi 
> b/arch/arm64/boot/dts/allwinner/sun50i-a64-pinephone.dtsi
> index cefda145c3c9..85a7aa5efd32 100644
> --- a/arch/arm64/boot/dts/allwinner/sun50i-a64-pinephone.dtsi
> +++ b/arch/arm64/boot/dts/allwinner/sun50i-a64-pinephone.dtsi
> @@ -16,6 +16,13 @@ aliases {
>               serial0 = &uart0;
>       };
>  
> +     backlight: backlight {
> +             compatible = "pwm-backlight";
> +             pwms = <&r_pwm 0 50000 PWM_POLARITY_INVERTED>;
> +             enable-gpios = <&pio 7 10 GPIO_ACTIVE_HIGH>; /* PH10 */
> +             /* Backlight configuration differs per PinePhone revision. */
> +     };
> +
>       chosen {
>               stdout-path = "serial0:115200n8";
>       };
> @@ -84,6 +91,30 @@ &dai {
>       status = "okay";
>  };
>  
> +&de {
> +     status = "okay";
> +};
> +
> +&dphy {
> +     status = "okay";
> +};
> +
> +&dsi {
> +     vcc-dsi-supply = <&reg_dldo1>;
> +     #address-cells = <1>;
> +     #size-cells = <0>;
> +     status = "okay";

If you're about to send a new version, you can remove #address-cells and
#size-cells too, they're already set in the DTSI.

Maxime

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