[media] videodev2.h: defines to calculate blanking and frame sizes

It is very common to have to calculate the total width and height of the
blanking and the full frame, so add a few defines that deal with that.
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Acked-by: Lad, Prabhakar <prabhakar.csengg@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>

include/uapi/linux/videodev2.h

@@ -1057,6 +1057,16 @@ struct v4l2_bt_timings {
    or used depends on the hardware. */
 #define V4L2_DV_FL_HALF_LINE			(1 << 3)
 
+/* A few useful defines to calculate the total blanking and frame sizes */
+#define V4L2_DV_BT_BLANKING_WIDTH(bt) \
+	(bt->hfrontporch + bt->hsync + bt->hbackporch)
+#define V4L2_DV_BT_FRAME_WIDTH(bt) \
+	(bt->width + V4L2_DV_BT_BLANKING_WIDTH(bt))
+#define V4L2_DV_BT_BLANKING_HEIGHT(bt) \
+	(bt->vfrontporch + bt->vsync + bt->vbackporch + \
+	 bt->il_vfrontporch + bt->il_vsync + bt->il_vbackporch)
+#define V4L2_DV_BT_FRAME_HEIGHT(bt) \
+	(bt->height + V4L2_DV_BT_BLANKING_HEIGHT(bt))
 
 /** struct v4l2_dv_timings - DV timings
  * @type:	the type of the timings