media: i2c: vgxy61: Report stream using frame descriptors

Add support for .get_frame_desc() to report CSI-2 virtual channel
and data type information. This allows CSI-2 receivers to properly
interpret the stream without inferring the data type from the pixel
format.

Signed-off-by: Julien Massot <[e-mail]>
Reviewed-by: Benjamin Mugnier <[e-mail]>
Signed-off-by: Sakari Ailus <[e-mail]>
Signed-off-by: Hans Verkuil <[e-mail]>

drivers/media/i2c/vgxy61.c

···
 	return ret;
 }
 
+static int vgxy61_get_frame_desc(struct v4l2_subdev *sd, unsigned int pad,
+				 struct v4l2_mbus_frame_desc *fd)
+{
+	struct vgxy61_dev *sensor = to_vgxy61_dev(sd);
+
+	fd->type = V4L2_MBUS_FRAME_DESC_TYPE_CSI2;
+	fd->num_entries = 1;
+	fd->entry[0].pixelcode = sensor->fmt.code;
+	fd->entry[0].stream = 0;
+	fd->entry[0].bus.csi2.vc = 0;
+	fd->entry[0].bus.csi2.dt = get_data_type_by_code(sensor->fmt.code);
+
+	return 0;
+}
+
 static int vgxy61_set_fmt(struct v4l2_subdev *sd,
 			  struct v4l2_subdev_state *sd_state,
 			  struct v4l2_subdev_format *format)
···
 	.set_fmt = vgxy61_set_fmt,
 	.get_selection = vgxy61_get_selection,
 	.enum_frame_size = vgxy61_enum_frame_size,
+	.get_frame_desc = vgxy61_get_frame_desc,
 };
 
 static const struct v4l2_subdev_ops vgxy61_subdev_ops = {