From 60c2820d0f6d3497975b6488e2599f8f611d8b95 Mon Sep 17 00:00:00 2001 From: Mauro Carvalho Chehab Date: Fri, 8 Jul 2016 11:40:06 -0300 Subject: doc_rst: rename the media Sphinx suff to Documentation/media The name of the subsystem is "media", and not "linux_tv". Also, as we plan to add other stuff there in the future, let's rename also the media uAPI book to media_uapi, to make it clearer. No functional changes. Signed-off-by: Mauro Carvalho Chehab --- Documentation/media/uapi/dvb/fe-get-property.rst | 68 ++++++++++++++++++++++++ 1 file changed, 68 insertions(+) create mode 100644 Documentation/media/uapi/dvb/fe-get-property.rst (limited to 'Documentation/media/uapi/dvb/fe-get-property.rst') diff --git a/Documentation/media/uapi/dvb/fe-get-property.rst b/Documentation/media/uapi/dvb/fe-get-property.rst new file mode 100644 index 000000000000..749daafe6b21 --- /dev/null +++ b/Documentation/media/uapi/dvb/fe-get-property.rst @@ -0,0 +1,68 @@ +.. -*- coding: utf-8; mode: rst -*- + +.. _FE_GET_PROPERTY: + +************************************** +ioctl FE_SET_PROPERTY, FE_GET_PROPERTY +************************************** + +Name +==== + +FE_SET_PROPERTY - FE_GET_PROPERTY - FE_SET_PROPERTY sets one or more frontend properties. - FE_GET_PROPERTY returns one or more frontend properties. + + +Synopsis +======== + +.. cpp:function:: int ioctl( int fd, int request, struct dtv_properties *argp ) + + +Arguments +========= + +``fd`` + File descriptor returned by :ref:`open() `. + +``request`` + FE_SET_PROPERTY, FE_GET_PROPERTY + +``argp`` + pointer to struct :ref:`dtv_properties ` + + +Description +=========== + +All DVB frontend devices support the ``FE_SET_PROPERTY`` and +``FE_GET_PROPERTY`` ioctls. The supported properties and statistics +depends on the delivery system and on the device: + +- ``FE_SET_PROPERTY:`` + + - This ioctl is used to set one or more frontend properties. + + - This is the basic command to request the frontend to tune into + some frequency and to start decoding the digital TV signal. + + - This call requires read/write access to the device. + + - At return, the values are updated to reflect the actual parameters + used. + +- ``FE_GET_PROPERTY:`` + + - This ioctl is used to get properties and statistics from the + frontend. + + - No properties are changed, and statistics aren't reset. + + - This call only requires read-only access to the device. + + +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 ` chapter. -- cgit v1.2.3