Index: sys/dev/drm2/radeon/rs690.c
===================================================================
--- sys/dev/drm2/radeon/rs690.c
+++ sys/dev/drm2/radeon/rs690.c
@@ -488,14 +488,10 @@
 		}
 		if (wm0.priority_mark.full > priority_mark02.full)
 			priority_mark02.full = wm0.priority_mark.full;
-		if (dfixed_trunc(priority_mark02) < 0)
-			priority_mark02.full = 0;
 		if (wm0.priority_mark_max.full > priority_mark02.full)
 			priority_mark02.full = wm0.priority_mark_max.full;
 		if (wm1.priority_mark.full > priority_mark12.full)
 			priority_mark12.full = wm1.priority_mark.full;
-		if (dfixed_trunc(priority_mark12) < 0)
-			priority_mark12.full = 0;
 		if (wm1.priority_mark_max.full > priority_mark12.full)
 			priority_mark12.full = wm1.priority_mark_max.full;
 		d1mode_priority_a_cnt = dfixed_trunc(priority_mark02);
@@ -526,8 +522,6 @@
 		}
 		if (wm0.priority_mark.full > priority_mark02.full)
 			priority_mark02.full = wm0.priority_mark.full;
-		if (dfixed_trunc(priority_mark02) < 0)
-			priority_mark02.full = 0;
 		if (wm0.priority_mark_max.full > priority_mark02.full)
 			priority_mark02.full = wm0.priority_mark_max.full;
 		d1mode_priority_a_cnt = dfixed_trunc(priority_mark02);
@@ -555,8 +549,6 @@
 		}
 		if (wm1.priority_mark.full > priority_mark12.full)
 			priority_mark12.full = wm1.priority_mark.full;
-		if (dfixed_trunc(priority_mark12) < 0)
-			priority_mark12.full = 0;
 		if (wm1.priority_mark_max.full > priority_mark12.full)
 			priority_mark12.full = wm1.priority_mark_max.full;
 		d2mode_priority_a_cnt = dfixed_trunc(priority_mark12);
Index: sys/dev/drm2/radeon/rv515.c
===================================================================
--- sys/dev/drm2/radeon/rv515.c
+++ sys/dev/drm2/radeon/rv515.c
@@ -1087,14 +1087,10 @@
 		}
 		if (wm0.priority_mark.full > priority_mark02.full)
 			priority_mark02.full = wm0.priority_mark.full;
-		if (dfixed_trunc(priority_mark02) < 0)
-			priority_mark02.full = 0;
 		if (wm0.priority_mark_max.full > priority_mark02.full)
 			priority_mark02.full = wm0.priority_mark_max.full;
 		if (wm1.priority_mark.full > priority_mark12.full)
 			priority_mark12.full = wm1.priority_mark.full;
-		if (dfixed_trunc(priority_mark12) < 0)
-			priority_mark12.full = 0;
 		if (wm1.priority_mark_max.full > priority_mark12.full)
 			priority_mark12.full = wm1.priority_mark_max.full;
 		d1mode_priority_a_cnt = dfixed_trunc(priority_mark02);
@@ -1125,8 +1121,6 @@
 		}
 		if (wm0.priority_mark.full > priority_mark02.full)
 			priority_mark02.full = wm0.priority_mark.full;
-		if (dfixed_trunc(priority_mark02) < 0)
-			priority_mark02.full = 0;
 		if (wm0.priority_mark_max.full > priority_mark02.full)
 			priority_mark02.full = wm0.priority_mark_max.full;
 		d1mode_priority_a_cnt = dfixed_trunc(priority_mark02);
@@ -1154,8 +1148,6 @@
 		}
 		if (wm1.priority_mark.full > priority_mark12.full)
 			priority_mark12.full = wm1.priority_mark.full;
-		if (dfixed_trunc(priority_mark12) < 0)
-			priority_mark12.full = 0;
 		if (wm1.priority_mark_max.full > priority_mark12.full)
 			priority_mark12.full = wm1.priority_mark_max.full;
 		d2mode_priority_a_cnt = dfixed_trunc(priority_mark12);