DMA_CHANNEL
off = (DMA_CHANNEL > 31) ? IPU_IDMAC_CH_EN_2 : IPU_IDMAC_CH_EN_1;
reg |= (1 << (DMA_CHANNEL & 0x1f));
IPU_WRITE_CH_PARAM(sc, DMA_CHANNEL, ¶m);
if (DMA_CHANNEL < 32) {
reg |= (1UL << (DMA_CHANNEL & 0x1f));
IPU_WRITE4(sc, cur_buf, (1UL << (DMA_CHANNEL & 0x1f)));