CamLink 4K: open gateware and firmware for the Elgato Cam Link 4K
The Elgato Cam Link 4K, from a 2019 LiteX board that booted Linux as a DRAM test to a complete open capture card: what the design does, how ECP5 DDR3 got twice the bandwidth in LiteDRAM, why it has lower latency than the stock firmware, and what changed between the two attempts.