diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
index 99b7f1d..e182c4d 100644
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -771,6 +771,9 @@ static uint32_t skl_get_aux_send_ctl(struct intel_dp *intel_dp,
 				      int send_bytes,
 				      uint32_t unused)
 {
+	struct drm_device *dev = intel_dp_to_dev(intel_dp);
+	struct drm_i915_private *dev_priv = to_i915(dev);
+
 	return DP_AUX_CH_CTL_SEND_BUSY |
 	       DP_AUX_CH_CTL_DONE |
 	       (has_aux_irq ? DP_AUX_CH_CTL_INTERRUPT : 0) |
@@ -778,7 +781,7 @@ static uint32_t skl_get_aux_send_ctl(struct intel_dp *intel_dp,
 	       DP_AUX_CH_CTL_TIME_OUT_1600us |
 	       DP_AUX_CH_CTL_RECEIVE_ERROR |
 	       (send_bytes << DP_AUX_CH_CTL_MESSAGE_SIZE_SHIFT) |
-	       DP_AUX_CH_CTL_SYNC_PULSE_SKL(32);
+	       DP_AUX_CH_CTL_SYNC_PULSE_SKL(dev_priv->cdclk_freq / ( 1000 * 2));
 }
 
 static int