[Intel-gfx] [PATCH 1/2] drm/i915: Fix fast wake AUX sync len

[Ville Syrjala]

From: Ville Syrjälä <ville.syrjala at linux.intel.com>

Fast wake should use 8 SYNC pulses for the preamble
and 10-16 SYNC pulses for the precharge. Recuce our
fast wake SYNC count to match the maximum value.
We also use the maximum precharge length for normal
AUX transactions.

Cc: Jouni Högander <jouni.hogander at intel.com>
Signed-off-by: Ville Syrjälä <ville.syrjala at linux.intel.com>
---
 drivers/gpu/drm/i915/display/intel_dp_aux.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/display/intel_dp_aux.c b/drivers/gpu/drm/i915/display/intel_dp_aux.c
index eb07dc5d8709..ad0aac707219 100644
--- a/drivers/gpu/drm/i915/display/intel_dp_aux.c
+++ b/drivers/gpu/drm/i915/display/intel_dp_aux.c
@@ -164,7 +164,7 @@ static u32 skl_get_aux_send_ctl(struct intel_dp *intel_dp,
 	      DP_AUX_CH_CTL_TIME_OUT_MAX |
 	      DP_AUX_CH_CTL_RECEIVE_ERROR |
 	      (send_bytes << DP_AUX_CH_CTL_MESSAGE_SIZE_SHIFT) |
-	      DP_AUX_CH_CTL_FW_SYNC_PULSE_SKL(32) |
+	      DP_AUX_CH_CTL_FW_SYNC_PULSE_SKL(24) |
 	      DP_AUX_CH_CTL_SYNC_PULSE_SKL(32);
 
 	if (intel_tc_port_in_tbt_alt_mode(dig_port))
-- 
2.39.2