VDMA_CHANNEL_CONFIG
val = reg_read(vc->dev, VDMA_CHANNEL_CONFIG[vc->ch]);
reg_write(vc->dev, VDMA_CHANNEL_CONFIG[vc->ch], val);
val = reg_read(vc->dev, VDMA_CHANNEL_CONFIG[vc->ch]);
reg_write(vc->dev, VDMA_CHANNEL_CONFIG[vc->ch], val);