What is the ember way to communicate from "parent" to "child" component ?

I know this is against the data down actions up idea but, following it my parent component is seeming to be very populated.

So, I am looking if there is another way.

Example case: I have a parent component holding "filters", "table" and "options". Now when a user select another table from options, the filter has to be reset. Thus, I need to trigger reset filter from parent component.