41 lines · plain
1What: /sys/kernel/debug/cec/*/error-inj2Date: March 20183Contact: Hans Verkuil <hverkuil-cisco@xs4all.nl>4Description:5 6The CEC Framework allows for CEC error injection commands through7debugfs. Drivers that support this will create an error-inj file8through which the error injection commands can be given.9 10The basic syntax is as follows:11 12Leading spaces/tabs are ignored. If the next character is a '#' or the13end of the line was reached, then the whole line is ignored. Otherwise14a command is expected.15 16It is up to the driver to decide what commands to implement. The only17exception is that the command 'clear' without any arguments must be18implemented and that it will remove all current error injection19commands.20 21This ensures that you can always do 'echo clear >error-inj' to clear any22error injections without having to know the details of the driver-specific23commands.24 25Note that the output of 'error-inj' shall be valid as input to 'error-inj'.26So this must work::27 28 $ cat error-inj >einj.txt29 $ cat einj.txt >error-inj30 31Other than these basic rules described above this ABI is not considered32stable and may change in the future.33 34Drivers that implement this functionality must document the commands as35part of the CEC documentation and must keep that documentation up to date36when changes are made.37 38The following CEC error injection implementations exist:39 40- Documentation/userspace-api/media/cec/cec-pin-error-inj.rst41