[PATCH 06/10] ARM: dts: Augment panel setting for Versatile

[Linus Walleij]

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

The "clcd" clock was incorrectly named, the proper name
(from bindings) is "clcdclk". So far drivers survived
by just getting the first clock, but future drivers will
use named clocks.

We add the panel connector to the
"arm,versatile-tft-panel" as well, the signals actually
fork on the board, reaching both the VGA DAC and the
display connector.

Cc: Liviu Dudau <liviu.dudau at arm.com>
Cc: Mali DP Maintainers <malidp at foss.arm.com>
Signed-off-by: Linus Walleij <linus.walleij at linaro.org>
---
 arch/arm/boot/dts/versatile-ab.dts | 83 +++++++++++++++++++++++++++++++++++++-
 1 file changed, 81 insertions(+), 2 deletions(-)

diff --git a/arch/arm/boot/dts/versatile-ab.dts b/arch/arm/boot/dts/versatile-ab.dts
index 4a51612996bc..5f61d3609027 100644
--- a/arch/arm/boot/dts/versatile-ab.dts
+++ b/arch/arm/boot/dts/versatile-ab.dts
@@ -30,6 +30,43 @@
 		clock-frequency = <24000000>;
 	};
 
+	bridge {
+		compatible = "ti,ths8134b", "ti,ths8134";
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		ports {
+			#address-cells = <1>;
+			#size-cells = <0>;
+
+			port at 0 {
+				reg = <0>;
+
+				vga_bridge_in: endpoint {
+					remote-endpoint = <&clcd_pads_vga_dac>;
+				};
+			};
+
+			port at 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>;
+			};
+		};
+	};
+
 	core-module at 10000000 {
 		compatible = "arm,core-module-versatile", "syscon", "simple-mfd";
 		reg = <0x10000000 0x200>;
@@ -230,7 +267,39 @@
 			reg = <0x10120000 0x1000>;
 			interrupts = <16>;
 			clocks = <&osc1>, <&pclk>;
-			clock-names = "clcd", "apb_pclk";
+			clock-names = "clcdclk", "apb_pclk";
+			/* 800x600 16bpp @ 36MHz works fine */
+			max-memory-bandwidth = <54000000>;
+
+			/*
+			 * 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 at 0 {
+				#address-cells = <1>;
+				#size-cells = <0>;
+
+				clcd_pads_panel: endpoint at 0 {
+					reg = <0>;
+					remote-endpoint = <&panel_in>;
+					arm,pl11x,tft-r0g0b0-pads = <0 8 16>;
+				};
+				clcd_pads_vga_dac: endpoint at 1 {
+					reg = <1>;
+					remote-endpoint = <&vga_bridge_in>;
+					arm,pl11x,tft-r0g0b0-pads = <0 8 16>;
+				};
+			};
 		};
 
 		sctl at 101e0000 {
@@ -319,8 +388,18 @@
 			ranges = <0 0x10000000 0x10000>;
 
 			sysreg at 0 {
-				compatible = "arm,versatile-sysreg", "syscon";
+				compatible = "arm,versatile-sysreg", "syscon", "simple-mfd";
 				reg = <0x00000 0x1000>;
+
+				panel: display at 0 {
+					compatible = "arm,versatile-tft-panel";
+
+					port {
+						panel_in: endpoint {
+							remote-endpoint = <&clcd_pads_panel>;
+						};
+					};
+				};
 			};
 
 			aaci at 4000 {
-- 
2.14.3