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lspcon.rs (110 lines): HDMI 1.4→2.0 protocol converter Parade Technologies + MegaChips vendor OUI detection LS/PCON/FRL mode selection via DP AUX Mode change with polling timeout Appears as DP-to-HDMI bridge on DDI port context.rs: module header documentation PPGTT 4-level page table architecture (PDP→PD→PT→PTE) 512 entries per level × 4KB pages Context manager BTreeMap + LRC descriptor lifecycle Ported from Linux 7.1: intel_lspcon.c → Lspcon Intel driver: 95 files, 0 errors — 24 spec-commented files