Adding upstream version 6.6.15.upstream/6.6.15

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 62 insertions, 0 deletions

diff --git a/Documentation/userspace-api/media/dvb/fe-read-status.rst b/Documentation/userspace-api/media/dvb/fe-read-status.rst
new file mode 100644
index 0000000000..75c6ee60ac
--- /dev/null
+++ b/Documentation/userspace-api/media/dvb/fe-read-status.rst
@@ -0,0 +1,62 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: DTV.fe
+
+.. _FE_READ_STATUS:
+
+********************
+ioctl FE_READ_STATUS
+********************
+
+Name
+====
+
+FE_READ_STATUS - Returns status information about the front-end. This call only requires - read-only access to the device
+
+Synopsis
+========
+
+.. c:macro:: FE_READ_STATUS
+
+``int ioctl(int fd, FE_READ_STATUS, unsigned int *status)``
+
+Arguments
+=========
+
+``fd``
+    File descriptor returned by :c:func:`open()`.
+
+``status``
+    pointer to a bitmask integer filled with the values defined by enum
+    :c:type:`fe_status`.
+
+Description
+===========
+
+All Digital TV frontend devices support the ``FE_READ_STATUS`` ioctl. It is
+used to check about the locking status of the frontend after being
+tuned. The ioctl takes a pointer to an integer where the status will be
+written.
+
+.. note::
+
+   The size of status is actually sizeof(enum fe_status), with
+   varies according with the architecture. This needs to be fixed in the
+   future.
+
+int fe_status
+=============
+
+The fe_status parameter is used to indicate the current state and/or
+state changes of the frontend hardware. It is produced using the enum
+:c:type:`fe_status` values on a bitmask
+
+Return Value
+============
+
+On success 0 is returned.
+
+On error -1 is returned, and the ``errno`` variable is set
+appropriately.
+
+Generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.