Use stratight-forward definition of DE_WINDOW_WIDTH register fields
and use open-coded implementation for register manipulation

Signed-off-by: Mike Rapoport <mike.rapop...@gmail.com>
---
 drivers/staging/sm750fb/sm750_accel.c | 15 +++++++++------
 drivers/staging/sm750fb/sm750_accel.h |  5 +++--
 2 files changed, 12 insertions(+), 8 deletions(-)

diff --git a/drivers/staging/sm750fb/sm750_accel.c 
b/drivers/staging/sm750fb/sm750_accel.c
index 88e39b8..5975bd0 100644
--- a/drivers/staging/sm750fb/sm750_accel.c
+++ b/drivers/staging/sm750fb/sm750_accel.c
@@ -103,8 +103,9 @@ int hw_fillrect(struct lynx_accel *accel,
                  (pitch / Bpp & DE_PITCH_SOURCE_MASK)); /* dpr10 */
 
        write_dpr(accel, DE_WINDOW_WIDTH,
-                       FIELD_VALUE(0, DE_WINDOW_WIDTH, DESTINATION, pitch/Bpp)|
-                       FIELD_VALUE(0, DE_WINDOW_WIDTH, SOURCE, pitch/Bpp)); /* 
dpr44 */
+                 ((pitch / Bpp << DE_WINDOW_WIDTH_DST_SHIFT) &
+                  DE_WINDOW_WIDTH_DST_MASK) |
+                  (pitch / Bpp & DE_WINDOW_WIDTH_SRC_MASK)); /* dpr44 */
 
        write_dpr(accel, DE_FOREGROUND, color); /* DPR14 */
 
@@ -235,8 +236,9 @@ unsigned int rop2)   /* ROP value */
        2D engine uses this value to calculate the linear address in frame 
buffer for a given point.
     */
        write_dpr(accel, DE_WINDOW_WIDTH,
-       FIELD_VALUE(0, DE_WINDOW_WIDTH, DESTINATION, (dPitch/Bpp)) |
-       FIELD_VALUE(0, DE_WINDOW_WIDTH, SOURCE,      (sPitch/Bpp))); /* dpr3c */
+                 ((dPitch / Bpp << DE_WINDOW_WIDTH_DST_SHIFT) &
+                  DE_WINDOW_WIDTH_DST_MASK) |
+                 (sPitch / Bpp & DE_WINDOW_WIDTH_SRC_MASK)); /* dpr3c */
 
        if (accel->de_wait() != 0)
                return -1;
@@ -327,8 +329,9 @@ int hw_imageblit(struct lynx_accel *accel,
         2D engine uses this value to calculate the linear address in frame 
buffer for a given point.
         */
        write_dpr(accel, DE_WINDOW_WIDTH,
-                 FIELD_VALUE(0, DE_WINDOW_WIDTH, DESTINATION, 
(dPitch/bytePerPixel)) |
-                 FIELD_VALUE(0, DE_WINDOW_WIDTH, SOURCE,      
(dPitch/bytePerPixel)));
+                 ((dPitch / bytePerPixel << DE_WINDOW_WIDTH_DST_SHIFT) &
+                  DE_WINDOW_WIDTH_DST_MASK) |
+                 (dPitch / bytePerPixel & DE_WINDOW_WIDTH_SRC_MASK));
 
         /* Note: For 2D Source in Host Write, only X_K1_MONO field is needed, 
and Y_K2 field is not used.
            For mono bitmap, use startBit for X_K1. */
diff --git a/drivers/staging/sm750fb/sm750_accel.h 
b/drivers/staging/sm750fb/sm750_accel.h
index 69aa47c..47b1a27 100644
--- a/drivers/staging/sm750fb/sm750_accel.h
+++ b/drivers/staging/sm750fb/sm750_accel.h
@@ -157,8 +157,9 @@
 #define DE_MONO_PATTERN_HIGH_PATTERN                    31:0
 
 #define DE_WINDOW_WIDTH                                 0x00003C
-#define DE_WINDOW_WIDTH_DESTINATION                     28:16
-#define DE_WINDOW_WIDTH_SOURCE                          12:0
+#define DE_WINDOW_WIDTH_DST_SHIFT                       16
+#define DE_WINDOW_WIDTH_DST_MASK                        (0x1fff << 16)
+#define DE_WINDOW_WIDTH_SRC_MASK                        0x1fff
 
 #define DE_WINDOW_SOURCE_BASE                           0x000040
 #define DE_WINDOW_SOURCE_BASE_EXT                       27:27
-- 
1.9.1

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