DMA_OV2_Cr
setup_frame_dma(ofb->fbi, DMA_OV2_Cr, -1, start[2], size / div);
uint32_t fdadr4 = ofb->fbi->fdadr[DMA_OV2_Cr] | (enabled ? 0x1 : 0);
lcd_writel(ofb->fbi, FBR4, ofb->fbi->fdadr[DMA_OV2_Cr] | 0x3);