1 files changed, 76 insertions, 0 deletions
diff --git a/drivers/staging/media/deprecated/saa7146/av7110/video-select-source.rst b/drivers/staging/media/deprecated/saa7146/av7110/video-select-source.rst
new file mode 100644
index 000000000000..929a20985d53
--- /dev/null
+++ b/drivers/staging/media/deprecated/saa7146/av7110/video-select-source.rst
@@ -0,0 +1,76 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: DTV.video
+
+.. _VIDEO_SELECT_SOURCE:
+
+===================
+VIDEO_SELECT_SOURCE
+===================
+
+Name
+----
+
+VIDEO_SELECT_SOURCE
+
+.. attention:: This ioctl is deprecated.
+
+Synopsis
+--------
+
+.. c:macro:: VIDEO_SELECT_SOURCE
+
+``int ioctl(fd, VIDEO_SELECT_SOURCE, video_stream_source_t source)``
+
+Arguments
+---------
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    -  .. row 1
+
+       -  int fd
+
+       -  File descriptor returned by a previous call to open().
+
+    -  .. row 2
+
+       -  int request
+
+       -  Equals VIDEO_SELECT_SOURCE for this command.
+
+    -  .. row 3
+
+       -  video_stream_source_t source
+
+       -  Indicates which source shall be used for the Video stream.
+
+Description
+-----------
+
+This ioctl is for Digital TV devices only. This ioctl was also supported by the
+V4L2 ivtv driver, but that has been replaced by the ivtv-specific
+``IVTV_IOC_PASSTHROUGH_MODE`` ioctl.
+
+This ioctl call informs the video device which source shall be used for
+the input data. The possible sources are demux or memory. If memory is
+selected, the data is fed to the video device through the write command.
+
+.. c:type:: video_stream_source_t
+
+.. code-block:: c
+
+	typedef enum {
+		VIDEO_SOURCE_DEMUX, /* Select the demux as the main source */
+		VIDEO_SOURCE_MEMORY /* If this source is selected, the stream
+				comes from the user through the write
+				system call */
+	} video_stream_source_t;
+
+Return Value
+------------
+
+On success 0 is returned, on error -1 and the ``errno`` variable is set
+appropriately. The generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.