8th Gen (S-platform) Intel Processor Family Datasheet Vol.1
https://www.intel.com/content/www/us/en/processors/core/8th-gen-processor-family-s-platform-datasheet-vol-1.html
Table 2-19. HDCP Display supported Implications Table

DPはHDCP2.2とHDRに対応、HDMI1.4もHDCP2.2に対応だがHDR未対応で4K@30まで、
HDMI2.0(a)はLSPCON（変換チップ）が必要