JZ_DMA_DCM_TIE
desc->desc[i].dcm |= JZ_DMA_DCM_TIE;
desc->desc[i].dcm |= JZ_DMA_DCM_TIE | JZ_DMA_DCM_LINK;
desc->desc[0].dcm = JZ_DMA_DCM_TIE | JZ_DMA_DCM_SAI | JZ_DMA_DCM_DAI |