no additional module needed for logging - please once more,
your bootargs are stored on a mtd partition which is not visible on the running e2 (HDMU).
after loading the i2s.ko module the partition is visible, bootargs can be read and written - but your box has limited functionality;
this is why I first ask if this module should be loaded or not...
So you get asked - saying yes loads this module until the next reboot - you don't have to do anything for it - the tool is assisting