ARM: dts: imx6qdl: Add HDMI to TQMa6x/MBa6

This adds support for a COTS monitor connected to X17.
4k monitors can be used, but are limited to 1080p.
Signed-off-by: Alexander Stein <alexander.stein@ew.tq-group.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

arch/arm/boot/dts/imx6qdl-mba6.dtsi

@@ -192,6 +192,13 @@ ethphy: ethernet-phy@3 {
 	};
 };
 
+&hdmi {
+	pinctrl-names = "default";
+	pinctrl-0 = <&pinctrl_hdmi>;
+	ddc-i2c-bus = <&i2c2>;
+	status = "okay";
+};
+
 &i2c1 {
 	tlv320aic32x4: audio-codec@18 {
 		compatible = "ti,tlv320aic32x4";
@@ -205,6 +212,17 @@ tlv320aic32x4: audio-codec@18 {
 	};
 };
 
+/* DDC */
+&i2c2 {
+	clock-frequency = <100000>;
+	pinctrl-names = "default", "gpio";
+	pinctrl-0 = <&pinctrl_i2c2>;
+	pinctrl-1 = <&pinctrl_i2c2_recovery>;
+	scl-gpios = <&gpio4 12 (GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN)>;
+	sda-gpios = <&gpio4 13 (GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN)>;
+	status = "okay";
+};
+
 &pcie {
 	pinctrl-names = "default";
 	pinctrl-0 = <&pinctrl_pcie>;
@@ -411,6 +429,15 @@ MX6QDL_PAD_EIM_BCLK__GPIO6_IO31 0xb099 /* LED V16 */
 		>;
 	};
 
+	pinctrl_hdmi: hdmigrp {
+		/* NOTE: DDC is done via I2C2, so DON'T
+		 * configure DDC pins for HDMI!
+		 */
+		fsl,pins = <
+			MX6QDL_PAD_EIM_A25__HDMI_TX_CEC_LINE 0x1f8b0
+		>;
+	};
+
 	pinctrl_hog: hoggrp {
 		fsl,pins = <
 			MX6QDL_PAD_DI0_PIN4__GPIO4_IO20 0x0001b099
@@ -447,6 +474,20 @@ MX6QDL_PAD_NANDF_CS1__GPIO6_IO14 0x0001b099
 		>;
 	};
 
+	pinctrl_i2c2: i2c2grp {
+		fsl,pins = <
+			MX6QDL_PAD_KEY_COL3__I2C2_SCL 0x4001b899
+			MX6QDL_PAD_KEY_ROW3__I2C2_SDA 0x4001b899
+		>;
+	};
+
+	pinctrl_i2c2_recovery: i2c2recoverygrp {
+		fsl,pins = <
+			MX6QDL_PAD_KEY_COL3__GPIO4_IO12 0x4001b899
+			MX6QDL_PAD_KEY_ROW3__GPIO4_IO13 0x4001b899
+		>;
+	};
+
 	pinctrl_pcie: pciegrp {
 		fsl,pins = <
 			/* HYS = 1, DSE = 110, 100k up, SPEED = HIGH (11)*/