Function decode_ltp_requests 

pub fn decode_ltp_requests(
    status_flags_1: u8,
    status_flags_2: u8,
) -> LtpRequests

Decodes the per-lane link training requests from Status_Flags_1 (lanes 0–1) and Status_Flags_2 (lanes 2–3), one nibble per lane, low nibble first.

Every value decodes: one the HDMI 2.1 specification leaves undefined (0x9–0xD) is LtpReq::Reserved.