Re: [linux-sunxi] [PATCH v2 5/5] arm64: allwinner: dts: a64: add LCD-related device nodes for PinePhone

[Icenowy Zheng]

在 2020-03-16星期一的 21:35 +0800，Icenowy Zheng写道：
> PinePhone uses PWM backlight and a XBD599 LCD panel over DSI for
> display.
> 
> Add its device nodes.
> 
> Signed-off-by: Icenowy Zheng <icen...@aosc.io>
> ---
> No changes in v2.
> 
>  .../dts/allwinner/sun50i-a64-pinephone.dtsi   | 37
> +++++++++++++++++++
>  1 file changed, 37 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/allwinner/sun50i-a64-pinephone.dtsi
> b/arch/arm64/boot/dts/allwinner/sun50i-a64-pinephone.dtsi
> index cefda145c3c9..96d9150423e0 100644
> --- a/arch/arm64/boot/dts/allwinner/sun50i-a64-pinephone.dtsi
> +++ b/arch/arm64/boot/dts/allwinner/sun50i-a64-pinephone.dtsi
> @@ -16,6 +16,15 @@ aliases {
>               serial0 = &uart0;
>       };
>  
> +     backlight: backlight {
> +             compatible = "pwm-backlight";
> +             pwms = <&r_pwm 0 50000 PWM_POLARITY_INVERTED>;
> +             brightness-levels = <0 16 18 20 22 24 26 29 32 35 38 42
> 46 51 56 62 68 75 83 91 100>;

Should I drop the 0 here and replace it with 14?

I have heard community complaining about setting 0 to brightness make
the screen black.

(I think in this situation bl_power or blank the DSI panel can still
totally shut down the backlight).

> +             default-brightness-level = <15>;
> +             enable-gpios = <&pio 7 10 GPIO_ACTIVE_HIGH>; /* PH10 */
> +             power-supply = <&reg_ldo_io0>;
> +     };
> +
>       chosen {
>               stdout-path = "serial0:115200n8";
>       };
> @@ -84,6 +93,30 @@ &dai {
>       status = "okay";
>  };
>  
> +&de {
> +     status = "okay";
> +};
> +
> +&dphy {
> +     status = "okay";
> +};
> +
> +&dsi {
> +     vcc-dsi-supply = <&reg_dldo1>;
> +     #address-cells = <1>;
> +     #size-cells = <0>;
> +     status = "okay";
> +
> +     panel@0 {
> +             compatible = "xingbangda,xbd599";
> +             reg = <0>;
> +             reset-gpios = <&pio 3 23 GPIO_ACTIVE_LOW>; /* PD23 */
> +             iovcc-supply = <&reg_dldo2>;
> +             vcc-supply = <&reg_ldo_io0>;
> +             backlight = <&backlight>;
> +     };
> +};
> +
>  &ehci0 {
>       status = "okay";
>  };
> @@ -188,6 +221,10 @@ &r_pio {
>        */
>  };
>  
> +&r_pwm {
> +     status = "okay";
> +};
> +
>  &r_rsb {
>       status = "okay";
>  
> -- 
> 2.24.1
> 

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