arm64: dts: imx8mm-verdin: enable hpd on hdmi-connector

Add hot plug detect gpio to the HDMI connector.
Signed-off-by: Stefan Eichenberger <stefan.eichenberger@toradex.com>
Signed-off-by: Francesco Dolcini <francesco.dolcini@toradex.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

arch/arm64/boot/dts/freescale/imx8mm-verdin.dtsi

@@ -56,7 +56,11 @@ key-wakeup {
 	hdmi_connector: hdmi-connector {
 		compatible = "hdmi-connector";
 		ddc-i2c-bus = <&i2c2>;
+		/* Verdin PWM_3_DSI (SODIMM 19) */
+		hpd-gpios = <&gpio1 1 GPIO_ACTIVE_HIGH>;
 		label = "hdmi";
+		pinctrl-names = "default";
+		pinctrl-0 = <&pinctrl_pwm_3_dsi_hpd_gpio>;
 		type = "a";
 		status = "disabled";
 	};
@@ -598,7 +602,7 @@ hwmon: hwmon@40 {
 	hdmi_lontium_lt8912: hdmi@48 {
 		compatible = "lontium,lt8912b";
 		pinctrl-names = "default";
-		pinctrl-0 = <&pinctrl_gpio_10_dsi>, <&pinctrl_pwm_3_dsi_hpd_gpio>;
+		pinctrl-0 = <&pinctrl_gpio_10_dsi>;
 		reg = <0x48>;
 		/* Verdin GPIO_9_DSI (LT8912 INT, SODIMM 17, unused) */
 		/* Verdin GPIO_10_DSI (SODIMM 21) */