IPU_CHA_CUR_BUF    21 drivers/dma/ipu/ipu_intern.h #define IPU_CHA_CUR_BUF		0x10
IPU_CHA_CUR_BUF    54 drivers/gpu/ipu-v3/ipu-prv.h #define IPU_CHA_CUR_BUF(ch)		IPU_CM_REG(0x023C + 4 * ((ch) / 32))