EXYNOS5: Add device node for DP

Add DT node and bindings documentaion for DP.

Signed-off-by: Ajay Kumar <ajaykumar.rs@samsung.com>
Signed-off-by: Minkyu Kang <mk7.kang@samsung.com>

arch/arm/dts/exynos5250.dtsi

@@ -162,4 +162,11 @@
 		#address-cells = <1>;
 		#size-cells = <1>;
 	};
+
+	dp@145b0000 {
+		compatible = "samsung,exynos5-dp";
+		reg = <0x145b0000 0x1000>;
+		#address-cells = <1>;
+		#size-cells = <1>;
+	};
 };

doc/device-tree-bindings/video/exynos-dp.txt

@@ -0,0 +1,69 @@
+Exynos Display port controller
+==============================
+
+Required properties:
+SOC specific:
+	compatible: should be "samsung,exynos5-dp"
+	reg: Base address of DP IP
+
+Optional properties:
+	samsung,h-res: X resolution of the panel
+	samsung,h-sync-width: hsync value
+	samsung,h-back-porch: left margin
+	samsung,h-front-porch right margin
+	samsung,v-res: Y resolution of the panel
+	samsung,v-sync-width: vsync value
+	samsung,v-back-porch: upper margin
+	samsung,v-front-porch: lower margin
+	samsung,v-sync-rate: refresh rate
+
+	samsung,lt-status: Link training status
+		0(DP_LT_NONE), 1(DP_LT_START), 2(DP_LT_CR), 3(DP_LT_ET),
+		4(DP_LT_FINISHED), 5(DP_LT_FAIL)
+
+	samsung,master-mode: 1 if you want to run DP as master, else 0
+	samsung,bist-mode: 1 to enable video bist mode, else 0
+	samsung,bist-pattern: bist mode pattern type
+		0(NO_PATTERN), 1(COLOR_RAMP), 2(BALCK_WHITE_V_LINES),
+		3(COLOR_SQUARE), 4(INVALID_PATTERN), 5(COLORBAR_32),
+		6(COLORBAR_64),7(WHITE_GRAY_BALCKBAR_32),
+		8(WHITE_GRAY_BALCKBAR_64),9(MOBILE_WHITEBAR_32),
+		10(MOBILE_WHITEBAR_64)
+	samsung,h-sync-polarity: Horizontal Sync polarity
+			CONFIG_SYS_LOW if defined, else CONFIG_SYS_HIGH
+	samsung,v-sync-polarity: Vertical Sync polarity
+			CONFIG_SYS_LOW if defined, else CONFIG_SYS_HIGH
+	samsung,interlaced: Progressive if 0, else Interlaced
+	samsung,color-space: input video data format
+		COLOR_RGB = 0, COLOR_YCBCR422 = 1, COLOR_YCBCR444 = 2
+	samsung,dynamic-range: dynamic range for input video data
+		VESA = 0, CEA = 1
+	samsung,ycbcr-coeff: YCbCr co-efficients for input video
+		COLOR_YCBCR601 = 0, COLOR_YCBCR709 = 1
+	samsung,color-depth: number of bits per colour component
+		COLOR_6 = 0, COLOR_8 = 1, COLOR_10 = 2, COLOR_12 = 3
+
+Example:
+SOC specific part:
+	dp@145b0000 {
+		compatible = "samsung,exynos5-dp";
+		reg = <0x145b0000 0x1000>;
+		#address-cells = <1>;
+		#size-cells = <1>;
+	};
+
+Board(panel) specific part:
+	dp@145b0000 {
+		samsung,lt-status = <0>;
+
+		samsung,master-mode = <0>;
+		samsung,bist-mode = <0>;
+		samsung,bist-pattern = <0>;
+		samsung,h-sync-polarity = <0>;
+		samsung,v-sync-polarity = <0>;
+		samsung,interlaced = <0>;
+		samsung,color-space = <0>;
+		samsung,dynamic-range = <0>;
+		samsung,ycbcr-coeff = <0>;
+		samsung,color-depth = <1>;
+	};