From 7a4238c79a815c0cb87eecb30897f6710f5e4a82 Mon Sep 17 00:00:00 2001
From: Phil Elwell <phil@raspberrypi.org>
Date: Mon, 2 Nov 2015 17:07:33 +0000
Subject: [PATCH] drm/vc4: Enable VC4 modules, and increase CMA size with
 overlay

If using the overlay, be careful not to boot to GUI or run startx,
or the Pi will almost hang, reporting stalls in kernel threads.
---
 arch/arm/boot/dts/overlays/README                  |  8 ++
 arch/arm/boot/dts/overlays/vc4-kms-v3d-overlay.dts | 95 ++++++++++++++++++++++
 arch/arm/configs/bcm2709_defconfig                 |  2 +
 arch/arm/configs/bcmrpi_defconfig                  |  2 +
 4 files changed, 107 insertions(+)
 create mode 100644 arch/arm/boot/dts/overlays/vc4-kms-v3d-overlay.dts

--- a/arch/arm/boot/dts/overlays/README
+++ b/arch/arm/boot/dts/overlays/README
@@ -601,6 +601,14 @@ Params: txd1_pin                 GPIO pi
         rxd1_pin                 GPIO pin for RXD1 (15, 33 or 41 - default 15)
 
 
+Name:   vc4-kms-v3d
+Info:   Enable Eric Anholt's DRM VC4 HDMI/HVS/V3D driver. Running startx or
+        booting to GUI while this overlay is in use will cause interesting
+        lockups.
+Load:   dtoverlay=vc4-kms-v3d
+Params: <None>
+
+
 Name:   vga666
 Info:   Overlay for the Fen Logic VGA666 board
         This uses GPIOs 2-21 (so no I2C), and activates the output 2-3 seconds
--- /dev/null
+++ b/arch/arm/boot/dts/overlays/vc4-kms-v3d-overlay.dts
@@ -0,0 +1,95 @@
+/*
+ * vc4-kms-v3d-overlay.dts
+ */
+
+/dts-v1/;
+/plugin/;
+
+#include "dt-bindings/clock/bcm2835.h"
+#include "dt-bindings/gpio/gpio.h"
+
+/ {
+	compatible = "brcm,bcm2835", "brcm,bcm2708", "brcm,bcm2709";
+
+	fragment@0 {
+		target = <&i2c2>;
+		__overlay__  {
+			status = "okay";
+		};
+	};
+
+	fragment@1 {
+		target = <&cprman>;
+		__overlay__  {
+			status = "okay";
+		};
+	};
+
+	fragment@2 {
+		target = <&fb>;
+		__overlay__  {
+			status = "disabled";
+		};
+	};
+
+	fragment@3 {
+		target = <&soc>;
+		__overlay__  {
+			#address-cells = <1>;
+			#size-cells = <1>;
+
+			pixelvalve@7e206000 {
+				compatible = "brcm,bcm2835-pixelvalve0";
+				reg = <0x7e206000 0x100>;
+				interrupts = <2 13>; /* pwa0 */
+			};
+
+			pixelvalve@7e207000 {
+				compatible = "brcm,bcm2835-pixelvalve1";
+				reg = <0x7e207000 0x100>;
+				interrupts = <2 14>; /* pwa1 */
+			};
+
+			hvs@7e400000 {
+				compatible = "brcm,bcm2835-hvs";
+				reg = <0x7e400000 0x6000>;
+				interrupts = <2 1>;
+			};
+
+			pixelvalve@7e807000 {
+				compatible = "brcm,bcm2835-pixelvalve2";
+				reg = <0x7e807000 0x100>;
+				interrupts = <2 10>; /* pixelvalve */
+			};
+
+			hdmi@7e902000 {
+				compatible = "brcm,bcm2835-hdmi";
+				reg = <0x7e902000 0x600>,
+				      <0x7e808000 0x100>;
+				interrupts = <2 8>, <2 9>;
+				ddc = <&i2c2>;
+				hpd-gpio = <&gpio 46 GPIO_ACTIVE_HIGH>;
+				clocks = <&cprman BCM2835_PLLH_PIX>,
+					 <&cprman BCM2835_CLOCK_HSM>;
+				clock-names = "pixel", "hdmi";
+			};
+
+			v3d@7ec00000 {
+				compatible = "brcm,vc4-v3d";
+				reg = <0x7ec00000 0x1000>;
+				interrupts = <1 10>;
+			};
+
+			gpu@7e4c0000 {
+				compatible = "brcm,bcm2835-vc4";
+			};
+		};
+	};
+
+	fragment@4 {
+		target-path = "/chosen";
+		__overlay__ {
+			bootargs = "cma=256M@512M";
+		};
+	};
+};
--- a/arch/arm/configs/bcm2709_defconfig
+++ b/arch/arm/configs/bcm2709_defconfig
@@ -802,6 +802,8 @@ CONFIG_VIDEO_TW9903=m
 CONFIG_VIDEO_TW9906=m
 CONFIG_VIDEO_OV7640=m
 CONFIG_VIDEO_MT9V011=m
+CONFIG_DRM=m
+CONFIG_DRM_VC4=m
 CONFIG_FB=y
 CONFIG_FB_BCM2708=y
 CONFIG_FB_UDL=m
--- a/arch/arm/configs/bcmrpi_defconfig
+++ b/arch/arm/configs/bcmrpi_defconfig
@@ -795,6 +795,8 @@ CONFIG_VIDEO_TW9903=m
 CONFIG_VIDEO_TW9906=m
 CONFIG_VIDEO_OV7640=m
 CONFIG_VIDEO_MT9V011=m
+CONFIG_DRM=m
+CONFIG_DRM_VC4=m
 CONFIG_FB=y
 CONFIG_FB_BCM2708=y
 CONFIG_FB_UDL=m