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| author | Hans Verkuil <hans.verkuil@cisco.com> | 2016-11-01 08:55:05 -0200 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@s-opensource.com> | 2016-11-16 15:32:56 -0200 |
| commit | adc0c622783978ab0c740af77f98fc8f65c87d66 (patch) | |
| tree | 800c4fccd3da0fe3616b144d10c3e21ba208f695 /Documentation/media/uapi | |
| parent | f4062625ede8f0280d8246437f4070c8eb7fe9f3 (diff) | |
| download | linux-adc0c622783978ab0c740af77f98fc8f65c87d66.tar.bz2 | |
[media] cec: add CEC_MSG_FL_REPLY_TO_FOLLOWERS
Give the caller more control over how replies to a transmit are
handled. By default the reply will only go to the filehandle that
called CEC_TRANSMIT. If this new flag is set, then the reply will
also go to all followers.
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Diffstat (limited to 'Documentation/media/uapi')
| -rw-r--r-- | Documentation/media/uapi/cec/cec-ioc-receive.rst | 22 |
1 files changed, 21 insertions, 1 deletions
diff --git a/Documentation/media/uapi/cec/cec-ioc-receive.rst b/Documentation/media/uapi/cec/cec-ioc-receive.rst index 21a88df3d9d9..b4dffd2f7dfa 100644 --- a/Documentation/media/uapi/cec/cec-ioc-receive.rst +++ b/Documentation/media/uapi/cec/cec-ioc-receive.rst @@ -119,7 +119,7 @@ result. transmit. * - __u32 - ``flags`` - - Flags. No flags are defined yet, so set this to 0. + - Flags. See :ref:`cec-msg-flags` for a list of available flags. * - __u8 - ``tx_status`` - The status bits of the transmitted message. See @@ -180,6 +180,26 @@ result. valid if the :ref:`CEC_TX_STATUS_ERROR <CEC-TX-STATUS-ERROR>` status bit is set. +.. _cec-msg-flags: + +.. flat-table:: Flags for struct cec_msg + :header-rows: 0 + :stub-columns: 0 + :widths: 3 1 4 + + * .. _`CEC-MSG-FL-REPLY-TO-FOLLOWERS`: + + - ``CEC_MSG_FL_REPLY_TO_FOLLOWERS`` + - 1 + - If a CEC transmit expects a reply, then by default that reply is only sent to + the filehandle that called :ref:`ioctl CEC_TRANSMIT <CEC_TRANSMIT>`. If this + flag is set, then the reply is also sent to all followers, if any. If the + filehandle that called :ref:`ioctl CEC_TRANSMIT <CEC_TRANSMIT>` is also a + follower, then that filehandle will receive the reply twice: once as the + result of the :ref:`ioctl CEC_TRANSMIT <CEC_TRANSMIT>`, and once via + :ref:`ioctl CEC_RECEIVE <CEC_RECEIVE>`. + + .. tabularcolumns:: |p{5.6cm}|p{0.9cm}|p{11.0cm}| .. _cec-tx-status: |