ARM: tegra: trimslice: enable HDMI port

Enable host1x, and the HDMI output. Harmony also has a DVI port with an
HDMI form-factor connector, driven by Tegra's LVDS output. This isn't
enabled yet, due to potential issues with having multiple outputs enabled.

Correct DDC I2C frequency to 100KHz.

Add dummy/fixed regulators to satisfy the HDMI driver.

Signed-off-by: Thierry Reding <thierry.reding@avionic-design.de>
[swarren: add commit description, remove enable of DVI port]
Signed-off-by: Stephen Warren <swarren@nvidia.com>

arch/arm/boot/dts/tegra20-trimslice.dts

@@ -10,6 +10,18 @@
 		reg = <0x00000000 0x40000000>;
 	};
 
+	host1x {
+		hdmi {
+			status = "okay";
+
+			vdd-supply = <&hdmi_vdd_reg>;
+			pll-supply = <&hdmi_pll_reg>;
+
+			nvidia,ddc-i2c-bus = <&hdmi_ddc>;
+			nvidia,hpd-gpio = <&gpio 111 0>; /* PN7 */
+		};
+	};
+
 	pinmux {
 		pinctrl-names = "default";
 		pinctrl-0 = <&state_default>;
@@ -249,9 +261,9 @@
 		clock-frequency = <216000000>;
 	};
 
-	i2c@7000c000 {
+	dvi_ddc: i2c@7000c000 {
 		status = "okay";
-		clock-frequency = <400000>;
+		clock-frequency = <100000>;
 	};
 
 	spi@7000c380 {
@@ -264,9 +276,9 @@
 		};
 	};
 
-	i2c@7000c400 {
+	hdmi_ddc: i2c@7000c400 {
 		status = "okay";
-		clock-frequency = <400000>;
+		clock-frequency = <100000>;
 	};
 
 	i2c@7000c500 {
@@ -310,6 +322,30 @@
 		bus-width = <4>;
 	};
 
+	regulators {
+		compatible = "simple-bus";
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		hdmi_vdd_reg: regulator@0 {
+			compatible = "regulator-fixed";
+			reg = <0>;
+			regulator-name = "avdd_hdmi";
+			regulator-min-microvolt = <3300000>;
+			regulator-max-microvolt = <3300000>;
+			regulator-always-on;
+		};
+
+		hdmi_pll_reg: regulator@1 {
+			compatible = "regulator-fixed";
+			reg = <1>;
+			regulator-name = "avdd_hdmi_pll";
+			regulator-min-microvolt = <1800000>;
+			regulator-max-microvolt = <1800000>;
+			regulator-always-on;
+		};
+	};
+
 	sound {
 		compatible = "nvidia,tegra-audio-trimslice";
 		nvidia,i2s-controller = <&tegra_i2s1>;