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drm/i915/alpm: Fix port clock usage in AUX Less wake time calculation

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Port clock is link rate in 10 kbit/s units. Take this into account when
calculating AUX Less wake time.

Fixes: da6a9836ac ("drm/i915/psr: Calculate aux less wake time")
Signed-off-by: Jouni Högander <jouni.hogander@intel.com>
Reviewed-by: Animesh Manna <animesh.manna@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240618053026.3268759-4-jouni.hogander@intel.com
This commit is contained in:
Jouni Högander 2024-06-18 08:30:20 +03:00
parent 1eb28818c2
commit 22f3a60558
1 changed files with 2 additions and 1 deletions
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3
drivers/gpu/drm/i915/display/intel_alpm.c
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@ -125,7 +125,8 @@ static int _lnl_compute_aux_less_wake_time(int port_clock)
int tsilence_max = 180;
int t1 = 50 * 1000;
int tps4 = 252;
int tml_phy_lock = 1000 * 1000 * tps4 * 10 / port_clock;
/* port_clock is link rate in 10kbit/s units */
int tml_phy_lock = 1000 * 1000 * tps4 / 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;