With the upcoming Linux 4.17 kernel cycle there will be initial support for HDCP with the i915 DRM driver. That High-bandwidth Digital Content Protection (HDCP) support in its initial form is limited to v1.4 on HDMI/DP connectors, but HDCP 2.2 is now being tackled…

Source: Phoronix – HDCP 2.2 Content Protection Being Worked On For The i915 DRM Driver