media: add digital video decoder entity functions

Add a new media entity function definition for digital TV decoders:
MEDIA_ENT_F_DTV_DECODER
Signed-off-by: Tim Harvey <tharvey@gateworks.com>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

Documentation/media/uapi/mediactl/media-types.rst

@@ -321,6 +321,17 @@ Types and flags used to represent the media graph elements
          MIPI CSI-2, ...), and outputs them on its source pad to an output
          video bus of another type (eDP, MIPI CSI-2, parallel, ...).
 
+    -  ..  row 31
+
+       ..  _MEDIA-ENT-F-DTV-DECODER:
+
+       -  ``MEDIA_ENT_F_DTV_DECODER``
+
+       -  Digital video decoder. The basic function of the video decoder is
+	  to accept digital video from a wide variety of sources
+	  and output it in some digital video standard, with appropriate
+	  timing signals.
+
 ..  tabularcolumns:: |p{5.5cm}|p{12.0cm}|
 
 .. _media-entity-flag:

include/uapi/linux/media.h

@@ -109,6 +109,11 @@ struct media_device_info {
 #define MEDIA_ENT_F_VID_MUX			(MEDIA_ENT_F_BASE + 0x5001)
 #define MEDIA_ENT_F_VID_IF_BRIDGE		(MEDIA_ENT_F_BASE + 0x5002)
 
+/*
+ * Digital video decoder entities
+ */
+#define MEDIA_ENT_F_DTV_DECODER			(MEDIA_ENT_F_BASE + 0x6001)
+
 /*
  * Connectors
  */