Add upstream and upstream-pi4 to overlay_map

Because the upstream overlay applies vc4-kms-v3d, of which Pi 4 has its
own version, there also needs to be a Pi 4 version - vc4-kms-v3d-pi4.

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

arch/arm/boot/dts/overlays/Makefile

@@ -183,6 +183,7 @@ dtbo-$(CONFIG_ARCH_BCM2835) += \
 	uart5.dtbo \
 	udrc.dtbo \
 	upstream.dtbo \
+	upstream-pi4.dtbo \
 	vc4-fkms-v3d.dtbo \
 	vc4-kms-kippah-7inch.dtbo \
 	vc4-kms-v3d.dtbo \

arch/arm/boot/dts/overlays/README

@@ -2653,6 +2653,13 @@ Info:   This overlay has been deprecated and removed because it is no longer
 Load:   <Deprecated>
 
 
+Name:   upstream-pi4
+Info:   Allow usage of downstream .dtb with upstream kernel on Pi 4. Comprises
+        the vc4-kms-v3d-pi4 and dwc2 overlays.
+Load:   dtoverlay=upstream-pi4
+Params: <None>
+
+
 Name:   vc4-fkms-v3d
 Info:   Enable Eric Anholt's DRM VC4 V3D driver on top of the dispmanx
         display stack.

arch/arm/boot/dts/overlays/overlay_map.dts

@@ -105,10 +105,19 @@
 		bcm2711;
 	};
 
+	upstream {
+		bcm2835;
+		bcm2711 = "upstream-pi4";
+	};
+
 	upstream-aux-interrupt {
 		deprecated = "no longer necessary";
 	};
 
+	upstream-pi4 {
+		bcm2711;
+	};
+
 	vc4-kms-v3d {
 		bcm2835;
 		bcm2711 = "vc4-kms-v3d-pi4";

arch/arm/boot/dts/overlays/upstream-pi4-overlay.dts

@@ -0,0 +1,161 @@
+// redo: ovmerge -c vc4-kms-v3d-pi4-overlay.dts,cma-96 dwc2-overlay.dts,dr_mode=otg
+
+/dts-v1/;
+/plugin/;
+
+#include <dt-bindings/clock/bcm2835.h>
+
+/ {
+	compatible = "brcm,bcm2835";
+	fragment@0 {
+		target-path = "/chosen";
+		__dormant__ {
+			bootargs = "cma=256M";
+		};
+	};
+	fragment@1 {
+		target-path = "/chosen";
+		__dormant__ {
+			bootargs = "cma=192M";
+		};
+	};
+	fragment@2 {
+		target-path = "/chosen";
+		__dormant__ {
+			bootargs = "cma=128M";
+		};
+	};
+	fragment@3 {
+		target-path = "/chosen";
+		__overlay__ {
+			bootargs = "cma=96M";
+		};
+	};
+	fragment@4 {
+		target-path = "/chosen";
+		__dormant__ {
+			bootargs = "cma=64M";
+		};
+	};
+	fragment@5 {
+		target = <&ddc0>;
+		__overlay__ {
+			status = "okay";
+		};
+	};
+	fragment@6 {
+		target = <&ddc1>;
+		__overlay__ {
+			status = "okay";
+		};
+	};
+	fragment@7 {
+		target = <&hdmi0>;
+		__overlay__ {
+			status = "okay";
+		};
+	};
+	fragment@8 {
+		target = <&hdmi1>;
+		__overlay__ {
+			status = "okay";
+		};
+	};
+	fragment@9 {
+		target = <&hvs>;
+		__overlay__ {
+			status = "okay";
+		};
+	};
+	fragment@10 {
+		target = <&pixelvalve0>;
+		__overlay__ {
+			status = "okay";
+		};
+	};
+	fragment@11 {
+		target = <&pixelvalve1>;
+		__overlay__ {
+			status = "okay";
+		};
+	};
+	fragment@12 {
+		target = <&pixelvalve2>;
+		__overlay__ {
+			status = "okay";
+		};
+	};
+	fragment@13 {
+		target = <&pixelvalve3>;
+		__overlay__ {
+			status = "okay";
+		};
+	};
+	fragment@14 {
+		target = <&pixelvalve4>;
+		__overlay__ {
+			status = "okay";
+		};
+	};
+	fragment@15 {
+		target = <&v3d>;
+		__overlay__ {
+			status = "okay";
+		};
+	};
+	fragment@16 {
+		target = <&vc4>;
+		__overlay__ {
+			status = "okay";
+		};
+	};
+	fragment@17 {
+		target = <&txp>;
+		__overlay__ {
+			status = "okay";
+		};
+	};
+	fragment@18 {
+		target = <&fb>;
+		__overlay__ {
+			status = "disabled";
+		};
+	};
+	fragment@19 {
+		target = <&firmwarekms>;
+		__overlay__ {
+			status = "disabled";
+		};
+	};
+	fragment@20 {
+		target = <&vec>;
+		__overlay__ {
+			status = "disabled";
+		};
+	};
+	fragment@21 {
+		target = <&hdmi0>;
+		__dormant__ {
+			dmas;
+		};
+	};
+	fragment@22 {
+		target = <&hdmi1>;
+		__dormant__ {
+			dmas;
+		};
+	};
+	fragment@23 {
+		target = <&usb>;
+		#address-cells = <1>;
+		#size-cells = <1>;
+		__overlay__ {
+			compatible = "brcm,bcm2835-usb";
+			dr_mode = "otg";
+			g-np-tx-fifo-size = <32>;
+			g-rx-fifo-size = <558>;
+			g-tx-fifo-size = <512 512 512 512 512 256 256>;
+			status = "okay";
+		};
+	};
+};