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authorMauro Carvalho Chehab <mchehab@osg.samsung.com>2015-05-29 02:52:52 +0300
committerMauro Carvalho Chehab <mchehab@osg.samsung.com>2015-05-30 17:04:05 +0300
commit0577a2f6d84a08da96c908a885db16b4d3532dc4 (patch)
tree2ddfea86a841468af857ae3c9ef6e8405043a5df
parent58e11cc3c1f7d7e9fa70ba6c3d363456151fcffd (diff)
downloadlinux-0577a2f6d84a08da96c908a885db16b4d3532dc4.tar.xz
[media] DocBook: improve documentation for OFDM transmission mode
Format it as a table and add more details, in special, for the DTMB modes. Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
-rw-r--r--Documentation/DocBook/media/dvb/dvbproperty.xml69
-rw-r--r--Documentation/DocBook/media/dvb/frontend.xml15
-rw-r--r--Documentation/DocBook/media/dvb/frontend_legacy_api.xml2
-rw-r--r--include/uapi/linux/dvb/frontend.h6
4 files changed, 59 insertions, 33 deletions
diff --git a/Documentation/DocBook/media/dvb/dvbproperty.xml b/Documentation/DocBook/media/dvb/dvbproperty.xml
index 41085537acfc..06a12f1c57c5 100644
--- a/Documentation/DocBook/media/dvb/dvbproperty.xml
+++ b/Documentation/DocBook/media/dvb/dvbproperty.xml
@@ -827,22 +827,61 @@ typedef enum fe_guard_interval {
<section id="DTV-TRANSMISSION-MODE">
<title><constant>DTV_TRANSMISSION_MODE</constant></title>
- <para>Specifies the number of carriers used by the standard</para>
+ <para>Specifies the number of carriers used by the standard.
+ This is used only on OFTM-based standards, e. g.
+ DVB-T/T2, ISDB-T, DTMB</para>
+
+<section id="fe-transmit-mode-t">
+<title>enum fe_transmit_mode: Number of carriers per channel</title>
+
+<table pgwide="1" frame="none" id="fe-transmit-mode">
+ <title>enum fe_transmit_mode</title>
+ <tgroup cols="2">
+ &cs-def;
+ <thead>
+ <row>
+ <entry>ID</entry>
+ <entry>Description</entry>
+ </row>
+ </thead>
+ <tbody valign="top">
+ <row>
+ <entry>TRANSMISSION_MODE_AUTO</entry>
+ <entry>Autodetect transmission mode. The hardware will try to find
+ the correct FFT-size (if capable) to fill in the missing
+ parameters.</entry>
+ </row><row>
+ <entry>TRANSMISSION_MODE_1K</entry>
+ <entry>Transmission mode 1K</entry>
+ </row><row>
+ <entry>TRANSMISSION_MODE_2K</entry>
+ <entry>Transmission mode 2K</entry>
+ </row><row>
+ <entry>TRANSMISSION_MODE_8K</entry>
+ <entry>Transmission mode 8K</entry>
+ </row><row>
+ <entry>TRANSMISSION_MODE_4K</entry>
+ <entry>Transmission mode 4K</entry>
+ </row><row>
+ <entry>TRANSMISSION_MODE_16K</entry>
+ <entry>Transmission mode 16K</entry>
+ </row><row>
+ <entry>TRANSMISSION_MODE_32K</entry>
+ <entry>Transmission mode 32K</entry>
+ </row><row>
+ <entry>TRANSMISSION_MODE_C1</entry>
+ <entry>Single Carrier (C=1) transmission mode (DTMB)</entry>
+ </row><row>
+ <entry>TRANSMISSION_MODE_C3780</entry>
+ <entry>Multi Carrier (C=3780) transmission mode (DTMB)</entry>
+ </row><row>
+ </row>
+ </tbody>
+ </tgroup>
+</table>
+</section>
+
- <para>Possible values are:</para>
-<programlisting>
-typedef enum fe_transmit_mode {
- TRANSMISSION_MODE_2K,
- TRANSMISSION_MODE_8K,
- TRANSMISSION_MODE_AUTO,
- TRANSMISSION_MODE_4K,
- TRANSMISSION_MODE_1K,
- TRANSMISSION_MODE_16K,
- TRANSMISSION_MODE_32K,
- TRANSMISSION_MODE_C1,
- TRANSMISSION_MODE_C3780,
-} fe_transmit_mode_t;
-</programlisting>
<para>Notes:</para>
<para>1) ISDB-T supports three carrier/symbol-size: 8K, 4K, 2K. It is called
'mode' in the standard: Mode 1 is 2K, mode 2 is 4K, mode 3 is 8K</para>
diff --git a/Documentation/DocBook/media/dvb/frontend.xml b/Documentation/DocBook/media/dvb/frontend.xml
index 77dd88ceeedd..3b6a169ac8f3 100644
--- a/Documentation/DocBook/media/dvb/frontend.xml
+++ b/Documentation/DocBook/media/dvb/frontend.xml
@@ -87,21 +87,6 @@ detection.
<section>
<title>More OFDM parameters</title>
-<section id="fe-transmit-mode-t">
-<title>Number of carriers per channel</title>
-<programlisting>
-typedef enum fe_transmit_mode {
- TRANSMISSION_MODE_2K,
- TRANSMISSION_MODE_8K,
- TRANSMISSION_MODE_AUTO,
- TRANSMISSION_MODE_4K,
- TRANSMISSION_MODE_1K,
- TRANSMISSION_MODE_16K,
- TRANSMISSION_MODE_32K,
- } fe_transmit_mode_t;
-</programlisting>
-</section>
-
<section id="fe-bandwidth-t">
<title>frontend bandwidth</title>
<programlisting>
diff --git a/Documentation/DocBook/media/dvb/frontend_legacy_api.xml b/Documentation/DocBook/media/dvb/frontend_legacy_api.xml
index fe1117e91f51..fa0c6649abfd 100644
--- a/Documentation/DocBook/media/dvb/frontend_legacy_api.xml
+++ b/Documentation/DocBook/media/dvb/frontend_legacy_api.xml
@@ -139,7 +139,7 @@ struct dvb_vsb_parameters {
fe_code_rate_t code_rate_HP; /&#x22C6; high priority stream code rate &#x22C6;/
fe_code_rate_t code_rate_LP; /&#x22C6; low priority stream code rate &#x22C6;/
&fe-modulation-t; constellation; /&#x22C6; modulation type (see above) &#x22C6;/
- fe_transmit_mode_t transmission_mode;
+ &fe-transmit-mode-t; transmission_mode;
fe_guard_interval_t guard_interval;
fe_hierarchy_t hierarchy_information;
};
diff --git a/include/uapi/linux/dvb/frontend.h b/include/uapi/linux/dvb/frontend.h
index 223905563676..c42e6d849f52 100644
--- a/include/uapi/linux/dvb/frontend.h
+++ b/include/uapi/linux/dvb/frontend.h
@@ -198,7 +198,7 @@ enum fe_modulation {
typedef enum fe_modulation fe_modulation_t;
-typedef enum fe_transmit_mode {
+enum fe_transmit_mode {
TRANSMISSION_MODE_2K,
TRANSMISSION_MODE_8K,
TRANSMISSION_MODE_AUTO,
@@ -208,7 +208,9 @@ typedef enum fe_transmit_mode {
TRANSMISSION_MODE_32K,
TRANSMISSION_MODE_C1,
TRANSMISSION_MODE_C3780,
-} fe_transmit_mode_t;
+};
+
+typedef enum fe_transmit_mode fe_transmit_mode_t;
#if defined(__DVB_CORE__) || !defined (__KERNEL__)
typedef enum fe_bandwidth {