1 What: /sys/kernel/debug/cec/*/error-inj 2 Date: March 2018 3 Contact: Hans Verkuil <hverkuil-cisco@xs4all.nl> 4 Description: 5 6 The CEC Framework allows for CEC error injection commands through 7 debugfs. Drivers that support this will create an error-inj file 8 through which the error injection commands can be given. 9 10 The basic syntax is as follows: 11 12 Leading spaces/tabs are ignored. If the next character is a '#' or the 13 end of the line was reached, then the whole line is ignored. Otherwise 14 a command is expected. 15 16 It is up to the driver to decide what commands to implement. The only 17 exception is that the command 'clear' without any arguments must be 18 implemented and that it will remove all current error injection 19 commands. 20 21 This ensures that you can always do 'echo clear >error-inj' to clear any 22 error injections without having to know the details of the driver-specific 23 commands. 24 25 Note that the output of 'error-inj' shall be valid as input to 'error-inj'. 26 So this must work:: 27 28 $ cat error-inj >einj.txt 29 $ cat einj.txt >error-inj 30 31 Other than these basic rules described above this ABI is not considered 32 stable and may change in the future. 33 34 Drivers that implement this functionality must document the commands as 35 part of the CEC documentation and must keep that documentation up to date 36 when changes are made. 37 38 The following CEC error injection implementations exist: 39 40 - Documentation/userspace-api/media/cec/cec-pin-error-inj.rst
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