diff --git a/drivers/staging/sm750fb/ddk750_mode.c b/drivers/staging/sm750fb/ddk750_mode.c
index 7e57b57598c9..9e762183e3f3 100644
--- a/drivers/staging/sm750fb/ddk750_mode.c
+++ b/drivers/staging/sm750fb/ddk750_mode.c
@@ -25,9 +25,7 @@ static unsigned long displayControlAdjust_SM750LE(mode_parameter_t *pModeParam,
 	   Note that normal SM750/SM718 only use those two register for
 	   auto-centering mode.
 	 */
-	POKE32(CRT_AUTO_CENTERING_TL,
-	FIELD_VALUE(0, CRT_AUTO_CENTERING_TL, TOP, 0)
-	| FIELD_VALUE(0, CRT_AUTO_CENTERING_TL, LEFT, 0));
+	POKE32(CRT_AUTO_CENTERING_TL, 0);
 
 	POKE32(CRT_AUTO_CENTERING_BR,
 	FIELD_VALUE(0, CRT_AUTO_CENTERING_BR, BOTTOM, y - 1)
diff --git a/drivers/staging/sm750fb/ddk750_reg.h b/drivers/staging/sm750fb/ddk750_reg.h
index 47028974d042..1d8d577c6a73 100644
--- a/drivers/staging/sm750fb/ddk750_reg.h
+++ b/drivers/staging/sm750fb/ddk750_reg.h
@@ -1477,8 +1477,8 @@
 #ifndef VALIDATION_CHIP
     /* Auto Centering */
     #define CRT_AUTO_CENTERING_TL                     0x080280
-    #define CRT_AUTO_CENTERING_TL_TOP                 26:16
-    #define CRT_AUTO_CENTERING_TL_LEFT                10:0
+    #define CRT_AUTO_CENTERING_TL_TOP_MASK            (0x7ff << 16)
+    #define CRT_AUTO_CENTERING_TL_LEFT_MASK           0x7ff
 
     #define CRT_AUTO_CENTERING_BR                     0x080284
     #define CRT_AUTO_CENTERING_BR_BOTTOM              26:16