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media: cec-ioc-receive.rst: document CEC_MSG_FL_RAW 

Document this new cec_msg flag.

Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
This commit is contained in:
Hans Verkuil 2019-05-15 03:50:41 -04:00 committed by Mauro Carvalho Chehab
parent aa50accfda
commit eabe3bc268
1 changed files with 14 additions and 1 deletions
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15
Documentation/media/uapi/cec/cec-ioc-receive.rst
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@ -223,6 +223,18 @@ View On' messages from initiator 0xf ('Unregistered') to destination 0 ('TV').
result of the :ref:`ioctl CEC_TRANSMIT <CEC_TRANSMIT>`, and once via
:ref:`ioctl CEC_RECEIVE <CEC_RECEIVE>`.
* .. _`CEC-MSG-FL-RAW`:
- ``CEC_MSG_FL_RAW``
- 2
- Normally CEC messages are validated before transmitting them. If this
flag is set when :ref:`ioctl CEC_TRANSMIT <CEC_TRANSMIT>` is called,
then no validation takes place and the message is transmitted as-is.
This is useful when debugging CEC issues.
This flag is only allowed if the process has the ``CAP_SYS_RAWIO``
capability. If that is not set, then the ``EPERM`` error code is
returned.
.. tabularcolumns:: |p{5.6cm}|p{0.9cm}|p{11.0cm}|
@ -358,7 +370,8 @@ ENOTTY
EPERM
The CEC adapter is not configured, i.e. :ref:`ioctl CEC_ADAP_S_LOG_ADDRS <CEC_ADAP_S_LOG_ADDRS>`
has never been called.
has never been called, or ``CEC_MSG_FL_RAW`` was used from a process that
did not have the ``CAP_SYS_RAWIO`` capability.
ENONET
The CEC adapter is not configured, i.e. :ref:`ioctl CEC_ADAP_S_LOG_ADDRS <CEC_ADAP_S_LOG_ADDRS>`