REG_MVFP
ret = ov7670_read(sd, REG_MVFP, &v);
return ov7670_write(sd, REG_MVFP, v);
ret = ov7670_read(sd, REG_MVFP, &v);
return ov7670_write(sd, REG_MVFP, v);
{ 0x16, 0x02 }, { REG_MVFP, 0x07 },
return ov965x_write(ov965x, REG_MVFP, mvfp);