See: 
https://bugs.chromium.org/p/chromium/issues/detail?id=680215

Pbody haptics suffers much more from the problem. Cause the haptic feedback will go through "touchpad->i2c->soc->i2c->haptic driver". The delay will be doubled. Currently, pci bus goes to sleep after few second, which is noticeable to user.

Filing this bug to track the update for pbody.