DMA_FF_UNDERFLOW_ENA_MASK  641 drivers/video/fbdev/mmp/hw/mmp_ctrl.h #define	 DMA_FF_UNDERFLOW_ENA_MASK		0x20000000
DMA_FF_UNDERFLOW_ENA_MASK  409 drivers/video/fbdev/pxa168fb.h #define     DMA_FF_UNDERFLOW_ENA_MASK		0x20000000