PS4 Tips and Tricks
First off this how you enable HDMI Device Link on Playstation 4
To activate HDMI Device Link for remote control of your TV, select (Settings) > [System], and then select the checkbox for [Enable HDMI Device Link]
What does HDMI Device Link do on Playstation 4? It allows for you to press the Playstation button your controller to not only turn on your PS4 but also to turn on your TV and set your TV tot he same HDMI port that the PS4 is connected to.