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Introduce a helper to compute the max link wake latency when using Auxless/Aux wake mechanism for PSR/Panel Replay/LOBF features. This will be used to compute the minimum guardband so that the link wake latencies are accounted and these features work smoothly for higher refresh rate panels. v2: - Account for flag `req_psr2_sdp_prior_scanline` and scl lines while computing min guardband. (Jouni) - Use wake lines only for eDP with panel_replay and sel_update flags set. (Jouni) Bspec: 70151, 71477 Signed-off-by: Ankit Nautiyal <ankit.k.nautiyal@intel.com> Reviewed-by: Jouni Högander <jouni.hogander@intel.com> Link: https://lore.kernel.org/r/20251017123504.2247954-2-ankit.k.nautiyal@intel.com