no_power
ret = no_power(sd);
*status |= no_power(sd) ? V4L2_IN_ST_NO_POWER : 0;
v4l2_info(sd, "Chip power: %s\n", no_power(sd) ? "off" : "on");
v4l2_info(sd, "Chip powered %s\n", no_power(sd) ? "off" : "on");
v4l2_info(sd, "Chip power: %s\n", no_power(sd) ? "off" : "on");