diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
index 2ae4e45..198d9c9 100644
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -2093,7 +2093,7 @@
 	 * row at the given clock rate, multiplied by 8.
 	 * */
 	temp |= PIPE_WM_LINETIME_TIME(
-		((mode->crtc_hdisplay * 1000) / mode->clock) * 8);
+		((mode->htotal * 1000) / mode->clock) * 8);
 
 	/* IPS watermarks are only used by pipe A, and are ignored by
 	 * pipes B and C.  They are calculated similarly to the common