[media] DocBook/media: document the new RDS TX controls

Document the new RDS features that will be supported by the si4713 driver.
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Cc: Eduardo Valentin <edubezval@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>

Documentation/DocBook/media/v4l/controls.xml

@@ -4049,6 +4049,68 @@ in Annex E of <xref linkend="iec62106" />. The length of Radio Text strings depe
 used to transmit it, either 32 (2A block) or 64 (2B block).  However, it is also possible
 to find receivers which can scroll strings sized as 32 x N or 64 x N characters. So, this control must be configured
 with steps of 32 or 64 characters. The result is it must always contain a string with size multiple of 32 or 64. </entry>
+	  </row>
+	  <row>
+	    <entry spanname="id"><constant>V4L2_CID_RDS_TX_MONO_STEREO</constant>&nbsp;</entry>
+	    <entry>boolean</entry>
+	  </row>
+	  <row><entry spanname="descr">Sets the Mono/Stereo bit of the Decoder Identification code. If set,
+then the audio was recorded as stereo.</entry>
+	  </row>
+	  <row>
+	    <entry spanname="id"><constant>V4L2_CID_RDS_TX_ARTIFICIAL_HEAD</constant>&nbsp;</entry>
+	    <entry>boolean</entry>
+	  </row>
+	  <row><entry spanname="descr">Sets the
+<ulink url="http://en.wikipedia.org/wiki/Artificial_head">Artificial Head</ulink> bit of the Decoder
+Identification code. If set, then the audio was recorded using an artificial head.</entry>
+	  </row>
+	  <row>
+	    <entry spanname="id"><constant>V4L2_CID_RDS_TX_COMPRESSED</constant>&nbsp;</entry>
+	    <entry>boolean</entry>
+	  </row>
+	  <row><entry spanname="descr">Sets the Compressed bit of the Decoder Identification code. If set,
+then the audio is compressed.</entry>
+	  </row>
+	  <row>
+	    <entry spanname="id"><constant>V4L2_CID_RDS_TX_DYNAMIC_PTY</constant>&nbsp;</entry>
+	    <entry>boolean</entry>
+	  </row>
+	  <row><entry spanname="descr">Sets the Dynamic PTY bit of the Decoder Identification code. If set,
+then the PTY code is dynamically switched.</entry>
+	  </row>
+	  <row>
+	    <entry spanname="id"><constant>V4L2_CID_RDS_TX_TRAFFIC_ANNOUNCEMENT</constant>&nbsp;</entry>
+	    <entry>boolean</entry>
+	  </row>
+	  <row><entry spanname="descr">If set, then a traffic announcement is in progress.</entry>
+	  </row>
+	  <row>
+	    <entry spanname="id"><constant>V4L2_CID_RDS_TX_TRAFFIC_PROGRAM</constant>&nbsp;</entry>
+	    <entry>boolean</entry>
+	  </row>
+	  <row><entry spanname="descr">If set, then the tuned programme carries traffic announcements.</entry>
+	  </row>
+	  <row>
+	    <entry spanname="id"><constant>V4L2_CID_RDS_TX_MUSIC_SPEECH</constant>&nbsp;</entry>
+	    <entry>boolean</entry>
+	  </row>
+	  <row><entry spanname="descr">If set, then this channel broadcasts music. If cleared, then it
+broadcasts speech. If the transmitter doesn't make this distinction, then it should be set.</entry>
+	  </row>
+	  <row>
+	    <entry spanname="id"><constant>V4L2_CID_RDS_TX_ALT_FREQS_ENABLE</constant>&nbsp;</entry>
+	    <entry>boolean</entry>
+	  </row>
+	  <row><entry spanname="descr">If set, then transmit alternate frequencies.</entry>
+	  </row>
+	  <row>
+	    <entry spanname="id"><constant>V4L2_CID_RDS_TX_ALT_FREQS</constant>&nbsp;</entry>
+	    <entry>__u32 array</entry>
+	  </row>
+	  <row><entry spanname="descr">The alternate frequencies in kHz units. The RDS standard allows
+for up to 25 frequencies to be defined. Drivers may support fewer frequencies so check
+the array size.</entry>
 	  </row>
 	  <row>
 	    <entry spanname="id"><constant>V4L2_CID_AUDIO_LIMITER_ENABLED</constant>&nbsp;</entry>