Four fixes from the code quality and Linux cross-reference audit:
1. DP AUX endianness (dp_aux.rs): Data packing must be big-endian
(MSB first, bits [31:24] = byte 0), matching Linux i915
intel_dp_aux_pack(). Fix send: (3-j)*8 shift. Fix receive:
to_be_bytes(). This was the #1 correctness bug — wrong endianness
would corrupt all DP AUX transactions.
2. Cursor pipe_select collision (cursor.rs): Mode and pipe select
were using the same bit positions. Fix: pipe_select at [29:28],
mode_64x64_argb = 0x27 per Intel PRM CUR_CTL register layout
and Linux MCURSOR_MODE_64_ARGB_AX + CURSOR_PIPE_SELECT.
3. Missing DP link training constants (dp_link.rs): Add
DP_LANE_CR_DONE, DP_LANE_CHANNEL_EQ_DONE, DP_LANE_SYMBOL_LOCKED
used in clock_recovery() and channel_equalization().
4. Missing ARL device ID (info.rs): Add 0x7D67 Arrow Lake-S
from Linux INTEL_ARL_S_IDS.
vasilito
af6d6ff607