From 6011a15d2261b3c326172347c74095a48c150b37 Mon Sep 17 00:00:00 2001
From: Linus Walleij <linus.walleij@linaro.org>
Date: Tue, 23 Jan 2018 14:19:05 +0100
Subject: [PATCH] ARM: dts: Augment VGA connector bridge on Realview PBX

The PL111 in the ARM reference platforms are connected to
"panels" that are actually dumb VGA DAC connector bridges.
Now that we can support the proper bridges in the DRM driver,
fix this up.

Cc: Mali DP Maintainers <malidp@foss.arm.com>
Reviewed-by: Liviu Dudau <liviu.dudau@arm.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
---
 arch/arm/boot/dts/arm-realview-pbx.dtsi | 82 ++++++++++++++++++++++-----------
 1 file changed, 55 insertions(+), 27 deletions(-)

diff --git a/arch/arm/boot/dts/arm-realview-pbx.dtsi b/arch/arm/boot/dts/arm-realview-pbx.dtsi
index aeb49c4..10868ba 100644
--- a/arch/arm/boot/dts/arm-realview-pbx.dtsi
+++ b/arch/arm/boot/dts/arm-realview-pbx.dtsi
@@ -34,7 +34,8 @@
 		serial1 = &serial1;
 		serial2 = &serial2;
 		serial3 = &serial3;
-		i2c0 = &i2c;
+		i2c0 = &i2c0;
+		i2c1 = &i2c1;
 	};
 
 	memory {
@@ -158,6 +159,49 @@
 		port1-otg;
 	};
 
+	bridge {
+		compatible = "ti,ths8134a", "ti,ths8134";
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		ports {
+			#address-cells = <1>;
+			#size-cells = <0>;
+
+			port@0 {
+				reg = <0>;
+
+				vga_bridge_in: endpoint {
+					remote-endpoint = <&clcd_pads>;
+				};
+			};
+
+			port@1 {
+				reg = <1>;
+
+				vga_bridge_out: endpoint {
+					remote-endpoint = <&vga_con_in>;
+				};
+			};
+		};
+	};
+
+	vga {
+		/*
+		 * This DDC I2C is connected directly to the DVI portions
+		 * of the connector, so it's not really working when the
+		 * monitor is connected to the VGA connector.
+		 */
+		compatible = "vga-connector";
+		ddc-i2c-bus = <&i2c1>;
+
+		port {
+			vga_con_in: endpoint {
+				remote-endpoint = <&vga_bridge_out>;
+			};
+		};
+	};
+
 	soc: soc@0 {
 		compatible = "arm,realview-pbx-soc", "simple-bus";
 		#address-cells = <1>;
@@ -285,7 +329,7 @@
 					       <&timclk>;
 		};
 
-		i2c: i2c@10002000 {
+		i2c0: i2c@10002000 {
 			#address-cells = <1>;
 			#size-cells = <0>;
 			compatible = "arm,versatile-i2c";
@@ -396,7 +440,12 @@
 			clock-names = "apb_pclk";
 		};
 
-		/* DVI serial bus control is at 10016000 */
+		i2c1: i2c@10016000 {
+			#address-cells = <1>;
+			#size-cells = <0>;
+			compatible = "arm,versatile-i2c";
+			reg = <0x10016000 0x1000>;
+		};
 
 		rtc: rtc@10017000 {
 			compatible = "arm,pl031", "arm,primecell";
@@ -506,36 +555,15 @@
 			interrupt-names = "combined";
 			clocks = <&oscclk4>, <&pclk>;
 			clock-names = "clcdclk", "apb_pclk";
+			/* 1024x768 16bpp @65MHz works fine */
+			max-memory-bandwidth = <95000000>;
 
 			port {
 				clcd_pads: endpoint {
-					remote-endpoint = <&clcd_panel>;
+					remote-endpoint = <&vga_bridge_in>;
 					arm,pl11x,tft-r0g0b0-pads = <0 8 16>;
 				};
 			};
-
-			panel {
-				compatible = "panel-dpi";
-
-				port {
-					clcd_panel: endpoint {
-						remote-endpoint = <&clcd_pads>;
-					};
-				};
-
-				/* Standard 640x480 VGA timings */
-				panel-timing {
-					clock-frequency = <25175000>;
-					hactive = <640>;
-					hback-porch = <48>;
-					hfront-porch = <16>;
-					hsync-len = <96>;
-					vactive = <480>;
-					vback-porch = <33>;
-					vfront-porch = <10>;
-					vsync-len = <2>;
-				};
-			};
 		};
 	};
 };
-- 
2.7.4