ARM: dts: Augment panel setting for Integrator/CP

This adds the actual VGA DAC bridge that is used in the
Versatile AB, and sets the mode to 640x480 VGA and
routes the CLCD pads appropriately.

Cc: Liviu Dudau <liviu.dudau@arm.com>
Cc: Mali DP Maintainers <malidp@foss.arm.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

arch/arm/boot/dts/integratorcp.dts

@@ -192,6 +192,43 @@ ethernet@c8000000 {
 		interrupts = <27>;
 	};
 
+	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_vga_dac>;
+				};
+			};
+
+			port@1 {
+				reg = <1>;
+
+				vga_bridge_out: endpoint {
+					remote-endpoint = <&vga_con_in>;
+				};
+			};
+		};
+	};
+
+	vga {
+		compatible = "vga-connector";
+
+		port {
+			vga_con_in: endpoint {
+				remote-endpoint = <&vga_bridge_out>;
+			};
+		};
+	};
+
 	fpga {
 		/*
 		 * These PrimeCells are at the same location and using
@@ -254,39 +291,27 @@ clcd@c0000000 {
 			interrupts = <22>;
 			clocks = <&auxosc>, <&pclk>;
 			clock-names = "clcdclk", "apb_pclk";
+			/* 640x480 16bpp @ 25.175MHz is 36827428 bytes/s */
+			max-memory-bandwidth = <40000000>;
 
-			port {
-				/*
-				 * The VGA connected is implemented with a
-				 * THS8134A triple DAC that can be run in 24bit
-				 * or 16bit RGB mode.
-				 */
-				clcd_pads: endpoint {
-					remote-endpoint = <&clcd_panel>;
-					arm,pl11x,tft-r0g0b0-pads = <1 7 13>;
-				};
-			};
-
-			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>;
+			/*
+			 * This port is routed through a PLD (Programmable
+			 * Logic Device) that routes the output from the CLCD
+			 * (after transformations) to the VGA DAC and also an
+			 * external panel connector. The PLD is essential for
+			 * supporting RGB565/BGR565.
+			 *
+			 * The signals from the port thus reaches two endpoints.
+			 * The PLD is managed through a few special bits in the
+			 * FPGA "sysreg".
+			 *
+			 * This arrangement can be clearly seen in
+			 * ARM DUI 0225D, page 3-41, figure 3-19.
+			 */
+			port@0 {
+				clcd_pads_vga_dac: endpoint {
+					remote-endpoint = <&vga_bridge_in>;
+					arm,pl11x,tft-r0g0b0-pads = <0 8 16>;
 				};
 			};
 		};