1 files changed, 108 insertions, 0 deletions
diff --git a/Documentation/media/uapi/dvb/dmx-fread.rst b/Documentation/media/uapi/dvb/dmx-fread.rst
new file mode 100644
index 000000000..d25b19e4f
--- /dev/null
+++ b/Documentation/media/uapi/dvb/dmx-fread.rst
@@ -0,0 +1,108 @@
+.. -*- coding: utf-8; mode: rst -*-
+
+.. _dmx_fread:
+
+================
+DVB demux read()
+================
+
+Name
+----
+
+DVB demux read()
+
+
+Synopsis
+--------
+
+.. cpp:function:: size_t read(int fd, void *buf, size_t count)
+
+
+Arguments
+---------
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+
+    -  .. row 1
+
+       -  int fd
+
+       -  File descriptor returned by a previous call to open().
+
+    -  .. row 2
+
+       -  void \*buf
+
+       -  Pointer to the buffer to be used for returned filtered data.
+
+    -  .. row 3
+
+       -  size_t count
+
+       -  Size of buf.
+
+
+Description
+-----------
+
+This system call returns filtered data, which might be section or PES
+data. The filtered data is transferred from the driver’s internal
+circular buffer to buf. The maximum amount of data to be transferred is
+implied by count.
+
+
+Return Value
+------------
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+
+    -  .. row 1
+
+       -  ``EWOULDBLOCK``
+
+       -  No data to return and O_NONBLOCK was specified.
+
+    -  .. row 2
+
+       -  ``EBADF``
+
+       -  fd is not a valid open file descriptor.
+
+    -  .. row 3
+
+       -  ``ECRC``
+
+       -  Last section had a CRC error - no data returned. The buffer is
+	  flushed.
+
+    -  .. row 4
+
+       -  ``EOVERFLOW``
+
+       -
+
+    -  .. row 5
+
+       -
+       -  The filtered data was not read from the buffer in due time,
+	  resulting in non-read data being lost. The buffer is flushed.
+
+    -  .. row 6
+
+       -  ``ETIMEDOUT``
+
+       -  The section was not loaded within the stated timeout period. See
+	  ioctl DMX_SET_FILTER for how to set a timeout.
+
+    -  .. row 7
+
+       -  ``EFAULT``
+
+       -  The driver failed to write to the callers buffer due to an invalid
+	  \*buf pointer.