FP_SHIFT
xscale = ((params->src_scan_width - 1) << FP_SHIFT) /
xscale = 1 << FP_SHIFT;
yscale = ((params->src_scan_height - 1) << FP_SHIFT) /
yscale = 1 << FP_SHIFT;
((xscale >> FP_SHIFT) << 16) |
((xscale_UV >> FP_SHIFT) << 16) |
iowrite32((((yscale >> FP_SHIFT) << 16) |
((yscale_UV >> FP_SHIFT) << 0)),