The documentation follows what's there at the ca.h header.
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
File descriptor returned by a previous call to :c:func:`open() <dvb-ca-open>`.
``desc``
- Undocumented.
+ Pointer to struct :c:type:`ca_descr_info`.
+
+.. c:type:: struct ca_descr_info
+
+.. flat-table:: struct ca_descr_info
+ :header-rows: 1
+ :stub-columns: 0
+
+ -
+ - type
+ - name
+ - description
+
+ -
+ - unsigned int
+ - num
+ - number of available descramblers (keys)
+ -
+ - unsigned int
+ - type
+ - type of supported scrambling system. Valid values are:
+ ``CA_ECD``, ``CA_NDS`` and ``CA_DSS``.
Description