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arm64: dts: sun50i-a64-pinephone: Enable LCD support on PinePhone 

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>
Link: https://lore.kernel.org/r/20200702081432.1727696-2-megous@megous.com
Signed-off-by: Maxime Ripard <maxime@cerno.tech>
This commit is contained in:
Icenowy Zheng 2020-07-02 10:14:31 +02:00 committed by Maxime Ripard
parent 21a827bf1c
commit a6a22f82c9
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GPG Key ID: E3EF0D6F671851C5
2 changed files with 52 additions and 0 deletions
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19
arch/arm64/boot/dts/allwinner/sun50i-a64-pinephone-1.1.dts
View File

@ -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>;
};

33
arch/arm64/boot/dts/allwinner/sun50i-a64-pinephone.dtsi
View File

@ -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 +91,28 @@ &dai {
status = "okay";
};
&de {
status = "okay";
};
&dphy {
status = "okay";
};
&dsi {
vcc-dsi-supply = <&reg_dldo1>;
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 +217,10 @@ &r_pio {
*/
};
&r_pwm {
status = "okay";
};
&r_rsb {
status = "okay";