Comment by Trung0246

Standard link to download: https://dokumen.pub/download/hdmi-specification-21-high-defi...

Alternative: https://annas-archive.org/md5/4dd395c749519a36cb755e6ebbe488...

Alternative (incomplete, only couple first page): https://device.report/m/91235972e8cbf6d6ce84f7cf84ca0ac12623...

Other HDMI stuff: https://pdfhost.io/v/YidEvBDkS_EP92A7E_EP91A7E_DS_V04

Older available here: https://glenwing.github.io/docs/