drm/rockchip: fix scaling calculation

Kwiboo · May 2, 2017 · ca8b478 · ca8b478
1 parent dd9fb83
commit ca8b478
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_vop.h b/drivers/gpu/drm/rockchip/rockchip_drm_vop.h
@@ -427,7 +427,7 @@ enum vop_pol {
 
 static inline uint16_t scl_cal_scale(int src, int dst, int shift)
 {
-	return ((src * 2 - 3) << (shift - 1)) / (dst - 1);
+	return ((src - 1) << shift) / (dst - 1);
 }
 
 static inline uint16_t scl_cal_scale2(int src, int dst)