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- What: /sys/kernel/debug/cec/*/error-inj
- Date: March 2018
- Contact: Hans Verkuil <[email protected]>
- Description:
- The CEC Framework allows for CEC error injection commands through
- debugfs. Drivers that support this will create an error-inj file
- through which the error injection commands can be given.
- The basic syntax is as follows:
- Leading spaces/tabs are ignored. If the next character is a '#' or the
- end of the line was reached, then the whole line is ignored. Otherwise
- a command is expected.
- It is up to the driver to decide what commands to implement. The only
- exception is that the command 'clear' without any arguments must be
- implemented and that it will remove all current error injection
- commands.
- This ensures that you can always do 'echo clear >error-inj' to clear any
- error injections without having to know the details of the driver-specific
- commands.
- Note that the output of 'error-inj' shall be valid as input to 'error-inj'.
- So this must work::
- $ cat error-inj >einj.txt
- $ cat einj.txt >error-inj
- Other than these basic rules described above this ABI is not considered
- stable and may change in the future.
- Drivers that implement this functionality must document the commands as
- part of the CEC documentation and must keep that documentation up to date
- when changes are made.
- The following CEC error injection implementations exist:
- - Documentation/userspace-api/media/cec/cec-pin-error-inj.rst
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