[media] adv7604: Specify the default input through platform data

And set input routing when initializing the device.
Signed-off-by: NLaurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: NHans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: NMauro Carvalho Chehab <m.chehab@samsung.com>

drivers/media/i2c/adv7604.c

@@ -2441,6 +2441,13 @@ static int adv7604_core_init(struct v4l2_subdev *sd)
 
 	disable_input(sd);
 
+	if (pdata->default_input >= 0 &&
+	    pdata->default_input < state->source_pad) {
+		state->selected_input = pdata->default_input;
+		select_input(sd);
+		enable_input(sd);
+	}
+
 	/* power */
 	io_write(sd, 0x0c, 0x42);   /* Power up part and power down VDP */
 	io_write(sd, 0x0b, 0x44);   /* Power down ESDP block */

include/media/adv7604.h

@@ -104,6 +104,8 @@ struct adv7604_platform_data {
 	/* DIS_CABLE_DET_RST: 1 if the 5V pins are unused and unconnected */
 	unsigned disable_cable_det_rst:1;
 
+	int default_input;
+
 	/* Analog input muxing mode */
 	enum adv7604_ain_sel ain_sel;