[media] videodev2.h/v4l2-dv-timings.h: add V4L2_DV_FL_IS_CE_VIDEO flag

In the past the V4L2_DV_BT_STD_CEA861 standard bit was used to
determine whether the format is a CE (Consumer Electronics) format
or not. However, the 640x480p59.94 format is part of the CEA-861
standard, but it is *not* a CE video format.

Add a new flag to make this explicit. This information is needed
in order to determine the default R'G'B' encoding for the format:
for CE video this is limited range (16-235) instead of full range
(0-255).

The header with all the timings has been updated with this new
flag.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Cc: Martin Bugge <marbugge@cisco.com>
Cc: Mats Randgaard <mats.randgaard@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>

1 files changed, 6 insertions, 0 deletions

diff --git a/include/uapi/linux/videodev2.h b/include/uapi/linux/videodev2.h
index 810bade873f4..fa376f7666ba 100644
--- a/include/uapi/linux/videodev2.h
+++ b/include/uapi/linux/videodev2.h
@@ -1188,6 +1188,12 @@ struct v4l2_bt_timings {
    exactly the same number of half-lines. Whether half-lines can be detected
    or used depends on the hardware. */
 #define V4L2_DV_FL_HALF_LINE			(1 << 3)
+/* If set, then this is a Consumer Electronics (CE) video format. Such formats
+ * differ from other formats (commonly called IT formats) in that if RGB
+ * encoding is used then by default the RGB values use limited range (i.e.
+ * use the range 16-235) as opposed to 0-255. All formats defined in CEA-861
+ * except for the 640x480 format are CE formats. */
+#define V4L2_DV_FL_IS_CE_VIDEO			(1 << 4)
 
 /* A few useful defines to calculate the total blanking and frame sizes */
 #define V4L2_DV_BT_BLANKING_WIDTH(bt) \