[v7,12/13] arm64: dts: sun50i-a64-pinephone: Enable LCD support on PinePhone
diff mbox series

Message ID 20200701162928.1638874-13-megous@megous.com
State New
Headers show
Series
  • Add support for PinePhone LCD panel
Related show

Commit Message

Ondřej Jirman July 1, 2020, 4:29 p.m. UTC
From: Icenowy Zheng <icenowy@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 <icenowy@aosc.io>
Signed-off-by: Martijn Braam <martijn@brixit.nl>
Signed-off-by: Ondrej Jirman <megous@megous.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
---
 .../allwinner/sun50i-a64-pinephone-1.1.dts    | 19 ++++++++++
 .../dts/allwinner/sun50i-a64-pinephone.dtsi   | 35 +++++++++++++++++++
 2 files changed, 54 insertions(+)

Comments

Maxime Ripard July 2, 2020, 7:46 a.m. UTC | #1
On Wed, Jul 01, 2020 at 06:29:27PM +0200, Ondrej Jirman wrote:
> From: Icenowy Zheng <icenowy@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 <icenowy@aosc.io>
> Signed-off-by: Martijn Braam <martijn@brixit.nl>
> Signed-off-by: Ondrej Jirman <megous@megous.com>
> Acked-by: Linus Walleij <linus.walleij@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

Patch
diff mbox series

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";
+
+	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 +219,10 @@  &r_pio {
 	 */
 };
 
+&r_pwm {
+	status = "okay";
+};
+
 &r_rsb {
 	status = "okay";