Add headphone detect and auto switch function.

Change-Id: I8fd55bb788d58b319bc22c970ccd8eeb91e4107a
Reviewed-on: https://tp-biosrd-v02/gerrit/80393
Reviewed-by: Jamess Huang(黃以民) <Jamess_Huang@asus.com>
Tested-by: Jamess Huang(黃以民) <Jamess_Huang@asus.com>

Author: Angus_Wang

arch/arm/boot/dts/rk3288-miniarm.dts

@@ -180,6 +180,7 @@
 		simple-audio-card,format = "i2s";
 		simple-audio-card,name = "rockchip,miniarm-codec";
 		simple-audio-card,mclk-fs = <512>;
+		simple-audio-card,hp-det-gpio = <&gpio7 4 GPIO_ACTIVE_LOW>;
 		simple-audio-card,cpu {
 			sound-dai = <&i2s>;
 		};

sound/soc/soc-jack.c

@@ -80,6 +80,31 @@ void snd_soc_jack_report(struct snd_soc_jack *jack, int status, int mask)
 	unsigned int sync = 0;
 	int enable;
 
+	int ret;
+	char *envp[] = {
+		"HOME=/",
+		"TERM=linux",
+		"PATH=/sbin:/usr/sbin:/bin:/usr/bin",
+		NULL,
+	};
+
+	char *argv[] = {
+		"/etc/pulse/movesinks.sh",
+		"alsa_output.OnBoard_D2",
+		NULL,
+	};
+
+	dev_info(jack->card->dev, "snd_soc_jack_report status=%d\n", status);
+
+	if (status) {
+		ret = call_usermodehelper(argv[0], argv, envp, UMH_WAIT_PROC);
+		if (ret != 0)
+			dev_err(jack->card->dev, "call_usermodehelper fail, ret=%d\n", ret);
+		else
+			dev_info(jack->card->dev, "audio jack plug in, auto switch to headphone\n");
+	}
+
+
 	trace_snd_soc_jack_report(jack, mask, status);
 
 	if (!jack)