viafb_i2c_writebyte
viafb_i2c_writebyte(viaparinfo->chip_info->tmds_chip_info.i2c_port,
viafb_i2c_writebyte(viaparinfo->chip_info->
viafb_i2c_writebyte(plvds_chip_info->i2c_port,
int viafb_i2c_writebyte(u8 adap, u8 slave_addr, u8 index, u8 data);