@zxczxc: See lipc-set-probe usage, -i is to set a property exposed as an int, which touchScreenSaverTimeout is, according to lipc-probe.
I happen to know the tier1 default timeout value because it hasn't changed since the K2, and I still remember it ;p (also, it's shown in the output of the status property of powerd).
Why 1? Because I guessed that it was actually more like a boolean value, so 1 for true effectively triggers it, and resets the countdown
. I haven't checked if we could make the countdown larger than the default t1 with a different value.
The tier2 timeout used to be 60s after t1, but I don't know if it's still the same value on FW 5.x.