linux-kernel - [DO NOT MERGE] [PATCH v2 3/3] arm64: rockchip: rk3399: nanopc-t4: Enable FriendlyELEC HD702E eDP panel

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Message-Id: <20190507130708.11255-3-jagan@amarulasolutions.com>
Date:   Tue,  7 May 2019 18:37:08 +0530
From:   Jagan Teki <jagan@...rulasolutions.com>
To:     Heiko Stuebner <heiko@...ech.de>, Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>
Cc:     linux-arm-kernel@...ts.infradead.org,
        linux-rockchip@...ts.infradead.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-amarula@...rulasolutions.com,
        Jagan Teki <jagan@...rulasolutions.com>,
        Thierry Reding <thierry.reding@...il.com>,
        Sam Ravnborg <sam@...nborg.org>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>,
        dri-devel@...ts.freedesktop.org
Subject: [DO NOT MERGE] [PATCH v2 3/3] arm64: rockchip: rk3399: nanopc-t4: Enable FriendlyELEC HD702E eDP panel

FriendlyELEC HD702E is one of optional LCD panel for
NanoPC T4 eDP interface.

It features 800x1280 resolutions, with built in GT9271 captive
touchscreen and adjustable backlight via PWM.

eDP panel connections are:
- VCC3V3_SYS: 3.3V panel power supply
- GPIO4_C2: PWM0_BL pin
- GPIO4_D5_LCD_BL_EN: Backlight enable pin
- VCC12V0_SYS: 12V backlight power supply
- Touchscreen connected via I2C4
- GPIO1_C4_TP_INT: touchscreen interrupt pin
- GPIO1_B5_TP_RST: touchscreen reset pin

Signed-off-by: Jagan Teki <jagan@...rulasolutions.com>
---
Changes for v2:
- use force-hpd and delete-property for edp
- use generic backlight brightness
- add simple-panel fallback compatible

 .../boot/dts/rockchip/rk3399-nanopc-t4.dts    | 50 +++++++++++++++++++
 1 file changed, 50 insertions(+)

diff --git a/arch/arm64/boot/dts/rockchip/rk3399-nanopc-t4.dts b/arch/arm64/boot/dts/rockchip/rk3399-nanopc-t4.dts
index 931c3dbf1b7d..4cacd09658dc 100644
--- a/arch/arm64/boot/dts/rockchip/rk3399-nanopc-t4.dts
+++ b/arch/arm64/boot/dts/rockchip/rk3399-nanopc-t4.dts
@@ -46,6 +46,14 @@
 		};
 	};
 
+	backlight: backlight {
+		compatible = "pwm-backlight";
+		enable-gpios = <&gpio4 RK_PD5 GPIO_ACTIVE_HIGH>;	/* GPIO4_D5_LCD_BL_EN */
+		pwms = <&pwm0 0 25000 0>;
+		power-supply = <&vcc12v0_sys>;
+		status = "okay";
+	};
+
 	ir-receiver {
 		compatible = "gpio-ir-receiver";
 		gpios = <&gpio0 RK_PA6 GPIO_ACTIVE_LOW>;
@@ -64,6 +72,18 @@
 		fan-supply = <&vcc12v0_sys>;
 		pwms = <&pwm1 0 50000 0>;
 	};
+
+	panel {
+		compatible ="friendlyarm,hd702e", "simple-panel";
+		backlight = <&backlight>;
+		power-supply = <&vcc3v3_sys>;
+
+		port {
+			panel_in_edp: endpoint {
+				remote-endpoint = <&edp_out_panel>;
+			};
+		};
+	};
 };
 
 &cpu_thermal {
@@ -94,6 +114,25 @@
 	};
 };
 
+&edp {
+	status = "okay";
+	force-hpd;
+	/delete-property/ pinctrl-0;
+
+	ports {
+		edp_out: port@1 {
+			reg = <1>;
+			#address-cells = <1>;
+			#size-cells = <0>;
+
+			edp_out_panel: endpoint@0 {
+				reg = <0>;
+				remote-endpoint = <&panel_in_edp>;
+			};
+		};
+	};
+};
+
 &gpu_thermal {
 	trips {
 		gpu_warm: gpu_warm {
@@ -130,6 +169,17 @@
 	};
 };
 
+&i2c4 {
+	touchscreen@5d {
+		compatible = "goodix,gt911";
+		reg = <0x5d>;
+		interrupt-parent = <&gpio1>;
+		interrupts = <RK_PC4 IRQ_TYPE_EDGE_FALLING>;
+		irq-gpio = <&gpio1 RK_PC4 GPIO_ACTIVE_HIGH>;	/* GPIO1_C4_TP_INT */
+		reset-gpio = <&gpio1 RK_PB5 GPIO_ACTIVE_LOW>;	/* GPIO1_B5_TP_RST */
+	};
+};
+
 &sdhci {
 	mmc-hs400-1_8v;
 	mmc-hs400-enhanced-strobe;
-- 
2.18.0.321.gffc6fa0e3