LDVSYNR
lcdc_write(sdev, LDVSYNR, value);
case LDVSYNR:
iowrite16((vsynp - 1) | ((vsynw - 1) << 12), par->base + LDVSYNR);
[LDVSYNR] = 0x454,
[LDVSYNR] = 0x630,
case LDVSYNR:
lcdc_write_chan(ch, LDVSYNR, tmp);