LCDC_DMA_CTRL_REG
tilcdc_clear(dev, LCDC_DMA_CTRL_REG,
reg = tilcdc_read(dev, LCDC_DMA_CTRL_REG) & ~0x00000770;
tilcdc_write(dev, LCDC_DMA_CTRL_REG, reg);
tilcdc_clear(dev, LCDC_DMA_CTRL_REG, LCDC_DUAL_FRAME_BUFFER_ENABLE);
tilcdc_set(dev, LCDC_DMA_CTRL_REG,
tilcdc_clear(dev, LCDC_DMA_CTRL_REG,
REG(1, true, LCDC_DMA_CTRL_REG),