https://stackoverflow.com/questions/45540274/emberjs-how-to-call-parent-component-method-from-child-component

components.my-child.js

import Ember from 'ember';

export default Ember.Component.extend({
});

components.my-parent.js

import Ember from 'ember';

export default Ember.Component.extend({
  actions:{
    show(){
      console.log('show in parent');
    }
  }
});

components.my-sub-child.js

import Ember from 'ember';

export default Ember.Component.extend({
});

controllers.application.js

import Ember from 'ember';

export default Ember.Controller.extend({
  appName: 'Ember Twiddle',
  
});

templates.application.hbs

<h1>Welcome to {{appName}}</h1>
<br>
{{my-parent }}
<br>
{{outlet}}
<br>
<br>

templates.components.my-child.hbs

{{#my-sub-child show=show}}
{{/my-sub-child}}
{{yield}}

templates.components.my-parent.hbs

{{my-child show=(action 'show')}}
{{yield}}

templates.components.my-sub-child.hbs

<button {{action show}}> Sub-child </button>
{{yield}}

twiddle.json

{
  "version": "0.12.1",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "2.12.0",
    "ember-template-compiler": "2.12.0",
    "ember-testing": "2.12.0"
  },
  "addons": {
    "ember-data": "2.12.1"
  }
}