media: ca-get-cap.rst: document this ioctl (3c71bfd4) · Commits · 戴 / test

Documentation/media/uapi/dvb/ca-get-cap.rst

+5 −31

Original line number	Diff line number	Diff line
		@@ -28,43 +28,17 @@ Arguments
		``caps``
		Pointer to struct :c:type:`ca_caps`.

		.. c:type:: struct ca_caps

		.. flat-table:: struct ca_caps
		:header-rows: 1
		:stub-columns: 0

		-
		- type
		- name
		- description
		-
		- unsigned int
		- slot_num
		- total number of CA card and module slots
		-
		- unsigned int
		- slot_type
		- bitmask with all supported slot types
		-
		- unsigned int
		- descr_num
		- total number of descrambler slots (keys)
		-
		- unsigned int
		- descr_type
		- bit mask with all supported descr types


		Description
		-----------

		.. note:: This ioctl is undocumented. Documentation is welcome.

		Queries the Kernel for information about the available CA and descrambler
		slots, and their types.

		Return Value
		------------

		On success 0 is returned, on error -1 and the ``errno`` variable is set
		On success 0 is returned and :c:type:`ca_caps` is filled.

		On error, -1 is returned and the ``errno`` variable is set
		appropriately. The generic error codes are described at the
		:ref:`Generic Error Codes <gen-errors>` chapter.