CFG_H_BACK_PORCH 256 drivers/video/fbdev/mmp/hw/mmp_ctrl.h #define CFG_H_BACK_PORCH(b) ((b)<<16) CFG_H_BACK_PORCH 83 drivers/video/fbdev/pxa168fb.h #define CFG_H_BACK_PORCH(b) ((b) << 16)