overlays: Rebuild 5inch display from the 7inch

Reimplement the vc4-kms-dsi-ili9881-5inch display overlay by applying a
few changes to the vc4-kms-dsi-ili9881-7inch version. In doing so, it
inherits the rotation parameter that was previously absent, which then
needs documenting.

Signed-off-by: Phil Elwell <phil@raspberrypi.com>

arch/arm/boot/dts/overlays/README

@@ -5595,6 +5595,7 @@ Params: sizex                   Touchscreen size x (default 720)
         invy                    Touchscreen inverted y axis
         swapxy                  Touchscreen swapped x y axis
         disable_touch           Disables the touch screen overlay driver
+        rotation                Display rotation {0,90,180,270} (default 0)
         dsi0                    Use DSI0 and i2c_csi_dsi0 (rather than
                                 the default DSI1 and i2c_csi_dsi).
 

arch/arm/boot/dts/overlays/vc4-kms-dsi-ili9881-5inch-overlay.dts

@@ -2,121 +2,13 @@
  * vc4-kms-dsi-ili9881-5inch-overlay.dts
  */
 
-/dts-v1/;
+#include "vc4-kms-dsi-ili9881-7inch-overlay.dts"
-/plugin/;
 
-#include <dt-bindings/gpio/gpio.h>
+&gt911 {
-
+	touchscreen-x-mm = <62>;
-/ {
+	touchscreen-y-mm = <110>;
-	compatible = "brcm,bcm2835";
+};
-
+
-	i2c_frag: fragment@0 {
+&dsi_panel {
-		target = <&i2c_csi_dsi>;
+	compatible = "raspberrypi,dsi-5inch";
-		__overlay__ {
-			#address-cells = <1>;
-			#size-cells = <0>;
-			status = "okay";
-
-			display_mcu: display_mcu@45
-			{
-				compatible = "raspberrypi,v2-touchscreen-panel-regulator";
-				reg = <0x45>;
-				gpio-controller;
-				#gpio-cells = <2>;
-			};
-
-			gt911: gt911@5d {
-				compatible = "goodix,gt911";
-				reg = <0x5d>;
-				AVDD28-supply = <&touch_reg>;
-				touchscreen-size-x = <720>;
-				touchscreen-size-y = <1280>;
-				touchscreen-x-mm = <62>;
-				touchscreen-y-mm = <110>;
-			};
-		};
-	};
-
-	dsi_frag: fragment@1 {
-		target = <&dsi1>;
-		__overlay__  {
-			#address-cells = <1>;
-			#size-cells = <0>;
-			status = "okay";
-
-			port {
-				dsi_out: endpoint {
-					remote-endpoint = <&panel_in>;
-				};
-			};
-
-			dsi_panel: dsi_panel@0 {
-				reg = <0>;
-				compatible = "raspberrypi,dsi-5inch";
-				reset-gpio = <&display_mcu 0 GPIO_ACTIVE_LOW>;
-				backlight = <&display_mcu>;
-
-				port {
-					panel_in: endpoint {
-						remote-endpoint = <&dsi_out>;
-					};
-				};
-			};
-		};
-	};
-
-	fragment@2 {
-		target = <&i2c0if>;
-		__overlay__ {
-			status = "okay";
-		};
-	};
-
-	fragment@3 {
-		target = <&i2c0mux>;
-		__overlay__ {
-			status = "okay";
-		};
-	};
-
-	fragment@4 {
-		target-path = "/";
-		__overlay__ {
-			touch_reg: touch_reg@1 {
-				reg = <1>;
-				compatible = "regulator-fixed";
-				regulator-name = "touch_reg_1";
-				gpio = <&display_mcu 1 GPIO_ACTIVE_HIGH>;
-				startup-delay-us = <50000>;
-				enable-active-high;
-			};
-		};
-	};
-
-	fragment@10 {
-		target = <&gt911>;
-		__dormant__ {
-			touchscreen-inverted-x;
-		};
-	};
-
-	fragment@11 {
-		target = <&gt911>;
-		__dormant__ {
-			touchscreen-inverted-y;
-		};
-	};
-
-	__overrides__ {
-		dsi0 = <&dsi_frag>, "target:0=",<&dsi0>,
-		       <&i2c_frag>, "target:0=",<&i2c_csi_dsi0>,
-		       <&touch_reg>, "reg:0=0",
-		       <&touch_reg>, "regulator-name=touch_reg_0";
-		sizex = <&gt911>,"touchscreen-size-x:0";
-		sizey = <&gt911>,"touchscreen-size-y:0";
-		invx = <0>, "+10";
-		invy = <0>, "+11";
-		swapxy = <&gt911>,"touchscreen-swapped-x-y?";
-		disable_touch = <&gt911>, "status=disabled";
-	};
 };