From 818fff9eed1c36f404f0556a0b239b43799a094b Mon Sep 17 00:00:00 2001
From: Dave Stevenson <dave.stevenson@raspberrypi.com>
Date: Tue, 10 Nov 2020 17:49:35 +0000
Subject: [PATCH] Add devicetree support for RaspberryPi 7" panel over
 DSI I2C

Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
---
 arch/arm/boot/dts/overlays/Makefile           |  1 +
 arch/arm/boot/dts/overlays/README             |  8 +++
 .../overlays/vc4-kms-dsi-7inch-overlay.dts    | 56 +++++++++++++++++++
 3 files changed, 65 insertions(+)
 create mode 100644 arch/arm/boot/dts/overlays/vc4-kms-dsi-7inch-overlay.dts

--- a/arch/arm/boot/dts/overlays/Makefile
+++ b/arch/arm/boot/dts/overlays/Makefile
@@ -201,6 +201,7 @@ dtbo-$(CONFIG_ARCH_BCM2835) += \
 	upstream.dtbo \
 	upstream-pi4.dtbo \
 	vc4-fkms-v3d.dtbo \
+	vc4-kms-dsi-7inch.dtbo \
 	vc4-kms-kippah-7inch.dtbo \
 	vc4-kms-v3d.dtbo \
 	vc4-kms-v3d-pi4.dtbo \
--- a/arch/arm/boot/dts/overlays/README
+++ b/arch/arm/boot/dts/overlays/README
@@ -2935,6 +2935,14 @@ Params: cma-512                 CMA is 5
         cma-default             Use upstream's default value
 
 
+Name:   vc4-kms-dsi-7inch
+Info:   Enable the Raspberry Pi DSI 7" screen.
+        Use edt-ft5406 for the touchscreen element.
+        Requires vc4-kms-v3d to be loaded.
+Load:   dtoverlay=vc4-kms-dsi-7inch
+Params: <None>
+
+
 Name:   vc4-kms-kippah-7inch
 Info:   Enable the Adafruit DPI Kippah with the 7" Ontat panel attached.
         Requires vc4-kms-v3d to be loaded.
--- /dev/null
+++ b/arch/arm/boot/dts/overlays/vc4-kms-dsi-7inch-overlay.dts
@@ -0,0 +1,56 @@
+/*
+ * Device Tree overlay for RaspberryPi 7" Touchscreen panel
+ *
+ */
+
+/dts-v1/;
+/plugin/;
+
+/ {
+	compatible = "brcm,bcm2835";
+
+	fragment@0 {
+		target = <&dsi1>;
+		__overlay__ {
+			#address-cells = <1>; size-cells = <0>;
+			status = "okay";
+			port {
+				dsi_out_port: endpoint {
+					remote-endpoint = <&panel_dsi_port>;
+				};
+			};
+		};
+	};
+
+	fragment@1 {
+		target = <&i2c_csi_dsi>;
+		__overlay__ {
+			#address-cells = <1>;
+			#size-cells = <0>;
+			status = "okay";
+			lcd@45 {
+				compatible = "raspberrypi,7inch-touchscreen-panel";
+				reg = <0x45>;
+				port {
+					panel_dsi_port: endpoint {
+						remote-endpoint = <&dsi_out_port>;
+					};
+				};
+			};
+		};
+	};
+
+	fragment@2 {
+		target = <&i2c0if>;
+		__overlay__ {
+			status = "okay";
+		};
+	};
+
+	fragment@3 {
+		target = <&i2c0mux>;
+		__overlay__ {
+			status = "okay";
+		};
+	};
+};