drm/i915/alpm: Use actual lfps cycle and silence periods in wake time

Currently we are using maximum lfps cycle and silence period times when
calculating AUXLess wake time. Use actual values instead.

Signed-off-by: Jouni Högander <jouni.hogander@intel.com>
Reviewed-by: Animesh Manna <animesh.manna@intel.com>
Link: https://lore.kernel.org/r/20250829053929.3585636-5-jouni.hogander@intel.com

diff --git a/drivers/gpu/drm/i915/display/intel_alpm.c b/drivers/gpu/drm/i915/display/intel_alpm.c
index b061f7165bbaadf671f324b48f5a7ad6c0450d8a..ed7a7ed486b55b6ca97af3c25cb2118b9af42923 100644 (file)
--- a/drivers/gpu/drm/i915/display/intel_alpm.c
+++ b/drivers/gpu/drm/i915/display/intel_alpm.c
@@ -116,21 +116,19 @@ static int get_lfps_half_cycle_clocks(const struct intel_crtc_state *crtc_state)
  * tML_PHY_LOCK = TPS4 Length * ( 10 / (Link Rate in MHz) )
  * TPS4 Length = 252 Symbols
  */
-static int _lnl_compute_aux_less_wake_time(int port_clock)
+static int _lnl_compute_aux_less_wake_time(const struct intel_crtc_state *crtc_state)
 {
        int tphy2_p2_to_p0 = 12 * 1000;
-       int tlfps_period_max = 800;
-       int tsilence_max = 180;
        int t1 = 50 * 1000;
        int tps4 = 252;
        /* port_clock is link rate in 10kbit/s units */
-       int tml_phy_lock = 1000 * 1000 * tps4 / port_clock;
+       int tml_phy_lock = 1000 * 1000 * tps4 / crtc_state->port_clock;
        int num_ml_phy_lock = 7 + DIV_ROUND_UP(6500, tml_phy_lock) + 1;
        int t2 = num_ml_phy_lock * tml_phy_lock;
        int tcds = 1 * t2;
 
-       return DIV_ROUND_UP(tphy2_p2_to_p0 + tlfps_period_max + tsilence_max +
-                           t1 + tcds, 1000);
+       return DIV_ROUND_UP(tphy2_p2_to_p0 + get_lfps_cycle_time(crtc_state) +
+                           SILENCE_PERIOD_TIME + t1 + tcds, 1000);
 }
 
 static int
@@ -142,7 +140,7 @@ _lnl_compute_aux_less_alpm_params(struct intel_dp *intel_dp,
                lfps_half_cycle;
 
        aux_less_wake_time =
-               _lnl_compute_aux_less_wake_time(crtc_state->port_clock);
+               _lnl_compute_aux_less_wake_time(crtc_state);
        aux_less_wake_lines = intel_usecs_to_scanlines(&crtc_state->hw.adjusted_mode,
                                                       aux_less_wake_time);
        silence_period = get_silence_period_symbols(crtc_state);