Divide the auxless wake time calculation in parts which will
help later to add Xe3p related modification.
v2: Refactor first existing calculation. [Jani]
v3: Cosmetic changes. [Jani, Suraj]
v4: Keep num_ml_phy_lock for readability and return the
establishment period directly. [Jouni]
Bspec: 71477
Cc: Jouni Högander <[email protected]>
Reviewed-by: Suraj Kandpal <[email protected]>
Signed-off-by: Animesh Manna <[email protected]>
---
drivers/gpu/drm/i915/display/intel_alpm.c | 31 ++++++++++++++++-------
1 file changed, 22 insertions(+), 9 deletions(-)
diff --git a/drivers/gpu/drm/i915/display/intel_alpm.c
b/drivers/gpu/drm/i915/display/intel_alpm.c
index 12dc79198494..ab6612b4506e 100644
--- a/drivers/gpu/drm/i915/display/intel_alpm.c
+++ b/drivers/gpu/drm/i915/display/intel_alpm.c
@@ -109,6 +109,25 @@ 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(const struct intel_crtc_state *crtc_state)
+{
+ return 12 * 1000;
+}
+
+static int get_establishment_period(const struct intel_crtc_state *crtc_state)
+{
+ 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, tcds;
+
+ num_ml_phy_lock = 7 + DIV_ROUND_UP(6500, tml_phy_lock) + 1;
+ tcds = num_ml_phy_lock * tml_phy_lock;
+
+ return SILENCE_PERIOD_TIME + t1 + tcds;
+}
+
/*
* AUX-Less Wake Time = CEILING( ((PHY P2 to P0) + tLFPS_Period, Max+
* tSilence, Max+ tPHY Establishment + tCDS) / tline)
@@ -130,17 +149,11 @@ static int get_lfps_half_cycle_clocks(const struct
intel_crtc_state *crtc_state)
*/
static int _lnl_compute_aux_less_wake_time(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(crtc_state);
+ int establishment_period = get_establishment_period(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
--
2.43.0
