I'm confused because I read that Linux getting HDCP support can do things like improve playback on Intel chipsets, but the technology itself is described as a system that encrypts data before it goes over the wire like DisplayPort, DVI, etc.
https://en.wikipedia.org/wiki/High-bandwidth_Digital_Content_Protection
https://www.phoronix.com/scan.php?page=news_item&px=Big-DRM-Makes-It-In-4.17