media: docs: move DVB audio/video docs to staging

The only upstream driver using the API described there is the
av7110 driver.

As the driver was moved to staging, move the API bits to staging
as well.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

1 files changed, 58 insertions, 0 deletions

diff --git a/drivers/staging/media/av7110/audio-set-av-sync.rst b/drivers/staging/media/av7110/audio-set-av-sync.rst
new file mode 100644
index 000000000000..85a8016bf025
--- /dev/null
+++ b/drivers/staging/media/av7110/audio-set-av-sync.rst
@@ -0,0 +1,58 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: DTV.audio
+
+.. _AUDIO_SET_AV_SYNC:
+
+=================
+AUDIO_SET_AV_SYNC
+=================
+
+Name
+----
+
+AUDIO_SET_AV_SYNC
+
+.. attention:: This ioctl is deprecated
+
+Synopsis
+--------
+
+.. c:macro:: AUDIO_SET_AV_SYNC
+
+``int ioctl(int fd, AUDIO_SET_AV_SYNC, boolean state)``
+
+Arguments
+---------
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    -
+
+       -  int fd
+
+       -  File descriptor returned by a previous call to open().
+
+    -
+
+       -  boolean state
+
+       -  Tells the Digital TV subsystem if A/V synchronization shall be ON or OFF.
+
+          TRUE: AV-sync ON
+
+          FALSE: AV-sync OFF
+
+Description
+-----------
+
+This ioctl call asks the Audio Device to turn ON or OFF A/V
+synchronization.
+
+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.