Divide the auxless wake time calculation in parts which will help later to add Xe3p related modification.
v1: Initial version. v2: Refactor first existing calculation. [Jani] Cc: Jouni Högander <[email protected]> Signed-off-by: Animesh Manna <[email protected]> --- drivers/gpu/drm/i915/display/intel_alpm.c | 37 ++++++++++++++++------- 1 file changed, 26 insertions(+), 11 deletions(-) diff --git a/drivers/gpu/drm/i915/display/intel_alpm.c b/drivers/gpu/drm/i915/display/intel_alpm.c index 779718d0c8dd..8d07455a62c2 100644 --- a/drivers/gpu/drm/i915/display/intel_alpm.c +++ b/drivers/gpu/drm/i915/display/intel_alpm.c @@ -85,6 +85,26 @@ static int get_lfps_half_cycle_clocks(const struct intel_crtc_state *crtc_state) 1000 / (2 * LFPS_CYCLE_COUNT); } +static int get_tphy2_p2_to_p0(struct intel_dp *intel_dp) +{ + return 12 * 1000; +} + +static int get_establishment_period(struct intel_dp *intel_dp, + const struct intel_crtc_state *crtc_state) +{ + int port_clock = crtc_state->port_clock; + int t1 = 50 * 1000; + int tps4 = (252 * 10); + long tml_phy_lock = 1000 * 1000 * tps4 / port_clock / 10; + int tcds, establishment_period; + + tcds = (7 + DIV_ROUND_UP(6500, tml_phy_lock) + 1) * tml_phy_lock; + establishment_period = (SILENCE_PERIOD_TIME + t1 + tcds); + + return establishment_period; +} + /* * AUX-Less Wake Time = CEILING( ((PHY P2 to P0) + tLFPS_Period, Max+ * tSilence, Max+ tPHY Establishment + tCDS) / tline) @@ -104,19 +124,14 @@ 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(const struct intel_crtc_state *crtc_state) +static int _lnl_compute_aux_less_wake_time(struct intel_dp *intel_dp, + const struct intel_crtc_state *crtc_state) { - int tphy2_p2_to_p0 = 12 * 1000; - int t1 = 50 * 1000; - int tps4 = 252; - /* port_clock is link rate in 10kbit/s units */ - 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; + int tphy2_p2_to_p0 = get_tphy2_p2_to_p0(intel_dp); + int establishment_period = get_establishment_period(intel_dp, crtc_state); return DIV_ROUND_UP(tphy2_p2_to_p0 + get_lfps_cycle_time(crtc_state) + - SILENCE_PERIOD_TIME + t1 + tcds, 1000); + establishment_period, 1000); } static int @@ -128,7 +143,7 @@ _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); + _lnl_compute_aux_less_wake_time(intel_dp, 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); -- 2.29.0
