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Diffstat (limited to 'Documentation/media/uapi/dvb/fe-read-ber.rst')
| -rw-r--r-- | Documentation/media/uapi/dvb/fe-read-ber.rst | 60 |
1 files changed, 60 insertions, 0 deletions
diff --git a/Documentation/media/uapi/dvb/fe-read-ber.rst b/Documentation/media/uapi/dvb/fe-read-ber.rst new file mode 100644 index 000000000000..c2b5b417f5fb --- /dev/null +++ b/Documentation/media/uapi/dvb/fe-read-ber.rst @@ -0,0 +1,60 @@ +.. -*- coding: utf-8; mode: rst -*- + +.. _FE_READ_BER: + +*********** +FE_READ_BER +*********** + +Name +==== + +FE_READ_BER + +Synopsis +======== + +.. cpp:function:: int ioctl(int fd, int request = FE_READ_BER, uint32_t *ber) + + +Arguments +========= + +.. flat-table:: + :header-rows: 0 + :stub-columns: 0 + + + - .. row 1 + + - int fd + + - File descriptor returned by a previous call to open(). + + - .. row 2 + + - int request + + - Equals :ref:`FE_READ_BER` for this command. + + - .. row 3 + + - uint32_t \*ber + + - The bit error rate is stored into \*ber. + + +Description +=========== + +This ioctl call returns the bit error rate for the signal currently +received/demodulated by the front-end. For this command, read-only +access to the device is sufficient. + + +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. |