In the target file system on the EVM, go to /opt/edgeai-gst-plugins/ext/tiovx/gsttiovxisp.c, and add the sensor's name to the list (IMX219 shown below as an example):

g_object_class_install_property (gobject_class, PROP_SENSOR_NAME,
    g_param_spec_string ("sensor-name", "Sensor name", 
        "TIOVX camera sensor string ID. Below are the supported sensors\n" 
        "SENSOR_SONY_IMX219_RPI\n"

Then add a function to configure the auto exposure parameters for the sensor. For example, IMX219 has the following function.

staticint32_tget_imx219_ae_dyn_params (IssAeDynamicParams*p_ae_dynPrms)
{
    int32_t status = -1;
    uint8_t count = 0;

    g_return_val_if_fail (p_ae_dynPrms, status);

    p_ae_dynPrms->targetBrightnessRange.min = 40; // min brightness on 0~255 scale
    p_ae_dynPrms->targetBrightnessRange.max = 50; // max brightness on 0~255 scale
    p_ae_dynPrms->targetBrightness = 45;          // target brightness
    p_ae_dynPrms->threshold = 5;                  // difference between target and min/max
    p_ae_dynPrms->enableBlc = 0;                  // not used

    p_ae_dynPrms->exposureTimeStepSize = 1; // step size for adjusting exposure time in microseconds
    p_ae_dynPrms->exposureTimeRange[count].min = 100;   // min exposure time in microseconds
    p_ae_dynPrms->exposureTimeRange[count].max = 33333; // max exposure time in microseconds

    p_ae_dynPrms->analogGainRange[count].min = 1024;    // min analog gain (1024 is for 1.0x gain)
    p_ae_dynPrms->analogGainRange[count].max = 8192;    // max analog gain (8192 is for 8.0x gain)
    p_ae_dynPrms->digitalGainRange[count].min = 256;    // digital gain is not used
    p_ae_dynPrms->digitalGainRange[count].max = 256;    // digital gain is not used
    count++;

    p_ae_dynPrms->numAeDynParams = count; 
    status = 0;
    return status;
}

Finally, add the exposure time and analog gain mappings. For example, IMX219 has the following mapping:

if (g_strcmp0 (self->sensor_name, "SENSOR_SONY_IMX219_RPI") == 0) 
{
    double multiplier = 0;
    // map AE output exposure time in microseconds to the exposure register value 
    *exposure_time_mapped = (1080 * exposure_time / 33); 

    // map AE output analog gain in Q10 integer format to the analog gain register value
    multiplier = analog_gain / 1024.0; 
    *analog_gain_mapped = 256.0 - 256.0 / multiplier; 
}