diff options
Diffstat (limited to 'Documentation/media/uapi/v4l/func-poll.rst')
| -rw-r--r-- | Documentation/media/uapi/v4l/func-poll.rst | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/Documentation/media/uapi/v4l/func-poll.rst b/Documentation/media/uapi/v4l/func-poll.rst index d0432dc..360bc65 100644 --- a/Documentation/media/uapi/v4l/func-poll.rst +++ b/Documentation/media/uapi/v4l/func-poll.rst @@ -39,7 +39,7 @@ When streaming I/O has been negotiated this function waits until a buffer has been filled by the capture device and can be dequeued with the :ref:`VIDIOC_DQBUF <VIDIOC_QBUF>` ioctl. For output devices this function waits until the device is ready to accept a new buffer to be -queued up with the :ref:`VIDIOC_QBUF` ioctl for +queued up with the :ref:`VIDIOC_QBUF <VIDIOC_QBUF>` ioctl for display. When buffers are already in the outgoing queue of the driver (capture) or the incoming queue isn't full (display) the function returns immediately. @@ -52,11 +52,11 @@ flags in the ``revents`` field, output devices the ``POLLOUT`` and ``POLLWRNORM`` flags. When the function timed out it returns a value of zero, on failure it returns -1 and the ``errno`` variable is set appropriately. When the application did not call -:ref:`VIDIOC_STREAMON` the :ref:`poll() <func-poll>` +:ref:`VIDIOC_STREAMON <VIDIOC_STREAMON>` the :ref:`poll() <func-poll>` function succeeds, but sets the ``POLLERR`` flag in the ``revents`` field. When the application has called -:ref:`VIDIOC_STREAMON` for a capture device but -hasn't yet called :ref:`VIDIOC_QBUF`, the +:ref:`VIDIOC_STREAMON <VIDIOC_STREAMON>` for a capture device but +hasn't yet called :ref:`VIDIOC_QBUF <VIDIOC_QBUF>`, the :ref:`poll() <func-poll>` function succeeds and sets the ``POLLERR`` flag in the ``revents`` field. For output devices this same situation will cause :ref:`poll() <func-poll>` to succeed as well, but it sets the ``POLLOUT`` and |
