static int find_down_level(LinphoneQoslevel *oldlevel, LinphoneQoslevel *level) {
const LinphoneQoslevel *cur_level = getcurent_level(oldlevel->fps, oldlevel->size);
const LinphoneQoslevel *lower_level;
lower_level = get_next_level(cur_level);
if (lower_level) {
*level = *lower_level;
if (level->max_bit > oldlevel->max_bit)
level->max_bit = oldlevel->max_bit;
return 0;
}
if (cur_level) {
if ((oldlevel->fps > cur_level->fps) || (oldlevel->size > cur_level->size) || (oldlevel->max_bit > cur_level->max_bit)) {
*level = *cur_level;
if (level->max_bit > oldlevel->max_bit)
level->max_bit = oldlevel->max_bit;
return 0;
}
if (oldlevel->max_bit > cur_level->min_bit) {
*level = *oldlevel;
level->max_bit = cur_level->min_bit;
return 0;
}
}
return 1;
}
/*For Factory Test Mode*/
static ssize_t lightsensor_file_state_show(struct device *dev, struct device_attribute *attr, char *buf)
{
struct bh1721_data *bh1721 = dev_get_drvdata(dev);
unsigned int result;
/*
* POWER ON command is possible to omit.
*/
printk("[%s] lightsensor_file_state_show \n", __func__);
bh1721_write_command(bh1721->i2c_client, &POWER_ON);
bh1721_write_command(bh1721->i2c_client, &H_RESOLUTION_2);
/* Maximum measurement time */
msleep(180);
bh1721_read_value(bh1721->i2c_client, bh1721->illuminance_data);
bh1721_write_command(bh1721->i2c_client, &POWER_DOWN);
result = bh1721->illuminance_data[0] << 8 | bh1721->illuminance_data[1];
result = (result*10)/12;
/* apply hysteresis */
printk("[%s] original lux = %u\n", __func__, result);
result = get_next_level(result);
printk("[%s] representative lux = %u\n", __func__, result);
return sprintf(buf, "%d\n", result);
}
static unsigned int lightsensor_get_adcvalue(struct bh1721_data *bh1721)
{
unsigned int result;
bh1721_write_command(bh1721->i2c_client, &H_RESOLUTION_2);
/* Maximum measurement time */
msleep(180);
bh1721_read_value(bh1721->i2c_client, bh1721->illuminance_data);
result = bh1721->illuminance_data[0] << 8 | bh1721->illuminance_data[1];
result = (result*10)/12;
result = get_next_level(result);
return result;
}
