Adding upstream version 4.19.249.upstream/4.19.249upstream

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

1 files changed, 63 insertions, 0 deletions

diff --git a/Documentation/media/uapi/dvb/fe-get-info.rst b/Documentation/media/uapi/dvb/fe-get-info.rst
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+.. -*- coding: utf-8; mode: rst -*-
+
+.. _FE_GET_INFO:
+
+*****************
+ioctl FE_GET_INFO
+*****************
+
+Name
+====
+
+FE_GET_INFO - Query Digital TV frontend capabilities and returns information
+about the - front-end. This call only requires read-only access to the device.
+
+
+Synopsis
+========
+
+.. c:function:: int ioctl( int fd, FE_GET_INFO, struct dvb_frontend_info *argp )
+    :name: FE_GET_INFO
+
+
+Arguments
+=========
+
+``fd``
+    File descriptor returned by :ref:`open() <frontend_f_open>`.
+
+``argp``
+    pointer to struct struct
+    :c:type:`dvb_frontend_info`
+
+
+Description
+===========
+
+All Digital TV frontend devices support the :ref:`FE_GET_INFO` ioctl. It is
+used to identify kernel devices compatible with this specification and to
+obtain information about driver and hardware capabilities. The ioctl
+takes a pointer to dvb_frontend_info which is filled by the driver.
+When the driver is not compatible with this specification the ioctl
+returns an error.
+
+
+frontend capabilities
+=====================
+
+Capabilities describe what a frontend can do. Some capabilities are
+supported only on some specific frontend types.
+
+The frontend capabilities are described at :c:type:`fe_caps`.
+
+
+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.