[PATCH v3 1/2] arm64: dts: rk3399-pinephone-pro: Add internal display support

[Javier Martinez Canillas <javierm@redhat.com>]

From: Martijn Braam <martijn@brixit.nl>

The phone's display is using a Hannstar LCD panel. Support it by adding a
panel DT node and all needed nodes (backlight, MIPI DSI, regulators, etc).

Signed-off-by: Martijn Braam <martijn@brixit.nl>
Co-developed-by: Kamil Trzciński <ayufan@ayufan.eu>
Signed-off-by: Kamil Trzciński <ayufan@ayufan.eu>
Co-developed-by: Ondrej Jirman <megi@xff.cz>
Signed-off-by: Ondrej Jirman <megi@xff.cz>
Signed-off-by: Javier Martinez Canillas <javierm@redhat.com>
Tested-by: Ondrej Jirman <megi@xff.cz>
---

Changes in v3:
- Fix some ./scripts/checkpatch.pl --strict warnings.
- Add Ondrej Jirman Tested-by tag.
- Change PWM period to 50000 since 20 kHz is recommended (Ondrej Jirman).
- Remove useless comments for the panel regulators (Ondrej Jirman).
- Drop unneeded pinctrl pull down conf for pins that either already have
  a pull-down resistor or are already driven by the SoC (Ondrej Jirman).
- Remove "pwm-delay-us" property not supported in mainline (Ondrej Jirman).

Changes in v2:
- Drop touchscreen node because used the wrong compatible (Ondrej Jirman).
- Fix assigned-clock-parents in vopb node (Ondrej Jirman).
- Add vopl and vopl nodes.

 .../dts/rockchip/rk3399-pinephone-pro.dts     | 95 +++++++++++++++++++
 1 file changed, 95 insertions(+)

diff --git a/arch/arm64/boot/dts/rockchip/rk3399-pinephone-pro.dts b/arch/arm64/boot/dts/rockchip/rk3399-pinephone-pro.dts
index a0795a2b1cb1..539b36e8bff5 100644
--- a/arch/arm64/boot/dts/rockchip/rk3399-pinephone-pro.dts
+++ b/arch/arm64/boot/dts/rockchip/rk3399-pinephone-pro.dts
@@ -29,6 +29,11 @@ chosen {
 		stdout-path = "serial2:115200n8";
 	};
 
+	backlight: backlight {
+		compatible = "pwm-backlight";
+		pwms = <&pwm0 0 50000 0>;
+	};
+
 	gpio-keys {
 		compatible = "gpio-keys";
 		pinctrl-names = "default";
@@ -102,6 +107,30 @@ wifi_pwrseq: sdio-wifi-pwrseq {
 		/* WL_REG_ON on module */
 		reset-gpios = <&gpio0 RK_PB2 GPIO_ACTIVE_LOW>;
 	};
+
+	/* MIPI DSI panel 1.8v supply */
+	vcc1v8_lcd: vcc1v8-lcd {
+		compatible = "regulator-fixed";
+		enable-active-high;
+		regulator-name = "vcc1v8_lcd";
+		regulator-min-microvolt = <1800000>;
+		regulator-max-microvolt = <1800000>;
+		vin-supply = <&vcc3v3_sys>;
+		gpio = <&gpio3 RK_PA5 GPIO_ACTIVE_HIGH>;
+		pinctrl-names = "default";
+	};
+
+	/* MIPI DSI panel 2.8v supply */
+	vcc2v8_lcd: vcc2v8-lcd {
+		compatible = "regulator-fixed";
+		enable-active-high;
+		regulator-name = "vcc2v8_lcd";
+		regulator-min-microvolt = <2800000>;
+		regulator-max-microvolt = <2800000>;
+		vin-supply = <&vcc3v3_sys>;
+		gpio = <&gpio3 RK_PA1 GPIO_ACTIVE_HIGH>;
+		pinctrl-names = "default";
+	};
 };
 
 &cpu_alert0 {
@@ -139,6 +168,11 @@ &emmc_phy {
 	status = "okay";
 };
 
+&gpu {
+	mali-supply = <&vdd_gpu>;
+	status = "okay";
+};
+
 &i2c0 {
 	clock-frequency = <400000>;
 	i2c-scl-rising-time-ns = <168>;
@@ -362,6 +396,39 @@ &io_domains {
 	status = "okay";
 };
 
+&mipi_dsi {
+	status = "okay";
+	clock-master;
+
+	ports {
+		mipi_out: port@1 {
+			#address-cells = <0>;
+			#size-cells = <0>;
+			reg = <1>;
+
+			mipi_out_panel: endpoint {
+				remote-endpoint = <&mipi_in_panel>;
+			};
+		};
+	};
+
+	panel@0 {
+		compatible = "hannstar,hsd060bhw4";
+		reg = <0>;
+		backlight = <&backlight>;
+		reset-gpios = <&gpio4 RK_PD1 GPIO_ACTIVE_LOW>;
+		vcc-supply = <&vcc2v8_lcd>;
+		iovcc-supply = <&vcc1v8_lcd>;
+		pinctrl-names = "default";
+
+		port {
+			mipi_in_panel: endpoint {
+				remote-endpoint = <&mipi_out_panel>;
+			};
+		};
+	};
+};
+
 &pmu_io_domains {
 	pmu1830-supply = <&vcc_1v8>;
 	status = "okay";
@@ -429,6 +496,10 @@ &sdio0 {
 	status = "okay";
 };
 
+&pwm0 {
+	status = "okay";
+};
+
 &sdmmc {
 	bus-width = <4>;
 	cap-sd-highspeed;
@@ -479,3 +550,27 @@ bluetooth {
 &uart2 {
 	status = "okay";
 };
+
+&vopb {
+	status = "okay";
+	assigned-clocks = <&cru DCLK_VOP0_DIV>, <&cru DCLK_VOP0>,
+			  <&cru ACLK_VOP0>, <&cru HCLK_VOP0>;
+	assigned-clock-rates = <0>, <0>, <400000000>, <100000000>;
+	assigned-clock-parents = <&cru PLL_GPLL>, <&cru DCLK_VOP0_DIV>;
+};
+
+&vopb_mmu {
+	status = "okay";
+};
+
+&vopl {
+	status = "okay";
+	assigned-clocks = <&cru DCLK_VOP1_DIV>, <&cru DCLK_VOP1>,
+			  <&cru ACLK_VOP1>, <&cru HCLK_VOP1>;
+	assigned-clock-rates = <0>, <0>, <400000000>, <100000000>;
+	assigned-clock-parents = <&cru PLL_GPLL>, <&cru DCLK_VOP1_DIV>;
+};
+
+&vopl_mmu {
+	status = "okay";
+};
-- 
2.40.0