The v4l2 command to set exposure and gain cannot call the corresponding setting function of the driver

Robotics & Edge Computing Jetson Systems Jetson AGX Xavier
,
1

We are developing a new driver based on the imx219 driver, using the latest R36.4.2. We set the gain and exposure using the v4l2 command and found that we cannot call the ov3c_set_gain and ovx3c_set_exposure functions in the driver (because I added printk prints in these functions, but cannot find them in dmesg).

v4l2-ctl -d /dev/video0 --set-fmt-video=width=1920,height=1080,pixelformat=RG12 --set-ctrl exposure=22000,gain=248,bypass_mode=0 --stream-mmap --stream-count=1 --stream-to=test_1920x1080.raw

But using the v4l2-ctl -l command to check the gain and gain values has changed.

`root@ubuntu:# v4l2-ctl -l

Camera Controls

                 group_hold 0x009a2003 (bool)   : default=0 value=0 flags=execute-on-write
                sensor_mode 0x009a2008 (int64)  : min=0 max=1 step=1 default=0 value=0 flags=slider
                       gain 0x009a2009 (int64)  : min=16 max=249 step=1 default=16 value=248 flags=slider
                   exposure 0x009a200a (int64)  : min=13 max=33001 step=1 default=11000 value=22000 flags=slider
                 frame_rate 0x009a200b (int64)  : min=2000000 max=30000000 step=1 default=30000000 value=2000000 flags=slider
       sensor_configuration 0x009a2032 (u32)    : min=0 max=4294967295 step=1 default=0 dims=[22] flags=read-only, volatile, has-payload
     sensor_mode_i2c_packet 0x009a2033 (u32)    : min=0 max=4294967295 step=1 default=0 dims=[1026] flags=read-only, volatile, has-payload
  sensor_control_i2c_packet 0x009a2034 (u32)    : min=0 max=4294967295 step=1 default=0 dims=[1026] flags=read-only, volatile, has-payload
                bypass_mode 0x009a2064 (intmenu): min=0 max=1 default=0 value=0 (0 0x0)
            override_enable 0x009a2065 (intmenu): min=0 max=1 default=0 value=0 (0 0x0)
               height_align 0x009a2066 (int)    : min=1 max=16 step=1 default=1 value=1
                 size_align 0x009a2067 (intmenu): min=0 max=2 default=0 value=0 (1 0x1)
           write_isp_format 0x009a2068 (int)    : min=1 max=1 step=1 default=1 value=1
   sensor_signal_properties 0x009a2069 (u32)    : min=0 max=4294967295 step=1 default=0 dims=[30][18] flags=read-only, has-payload
    sensor_image_properties 0x009a206a (u32)    : min=0 max=4294967295 step=1 default=0 dims=[30][16] flags=read-only, has-payload
  sensor_control_properties 0x009a206b (u32)    : min=0 max=4294967295 step=1 default=0 dims=[30][36] flags=read-only, has-payload
          sensor_dv_timings 0x009a206c (u32)    : min=0 max=4294967295 step=1 default=0 dims=[30][16] flags=read-only, has-payload
           low_latency_mode 0x009a206d (bool)   : default=0 value=0
           preferred_stride 0x009a206e (int)    : min=0 max=65535 step=1 default=0 value=0
override_capture_timeout_ms 0x009a206f (int)    : min=-1 max=2147483647 step=1 default=2500 value=2500
               sensor_modes 0x009a2082 (int)    : min=0 max=30 step=1 default=30 value=1 flags=read-only`

The drive is also set up in the form of imx219.

`
static const u32 ctrl_cid_list = {

TEGRA_CAMERA_CID_GAIN,

TEGRA_CAMERA_CID_EXPOSURE,

TEGRA_CAMERA_CID_FRAME_RATE,

TEGRA_CAMERA_CID_SENSOR_MODE_ID,

};

static struct tegracam_ctrl_ops ovx3c_ctrl_ops = {
.numctrls = ARRAY_SIZE(ctrl_cid_list),
.ctrl_cid_list = ctrl_cid_list,
.set_gain = ovx3c_set_gain,
.set_exposure = ovx3c_set_exposure,
.set_frame_rate = ovx3c_set_frame_rate,
.set_group_hold = ovx3c_set_group_hold,
};

static int ovx3c_set_gain(struct tegracam_device *tc_dev, s64 val)
{

struct camera_common_data *s_data = tc_dev->s_data;
struct device *dev = s_data->dev;


dev_info(dev,"set gain %lld \n", val);

}
`

Can you help me see what the problem is? How should I investigate? Thank you.

3

In my exp in Jetpack 5, the ctrl ops will be run once the probe function is called.
Did you see the print out during probe function?
If no, maybe compatible is set wrong and leading to call another driver?

4

Below is the log of insmod and the operation.No print regarding the set_gain function

[ 1475.392452] ovx3c 9-0036: load ko version [2.1.0]
[ 1475.392574] ovx3c 9-0036: tegracam sensor driver:ovx3c_v2.0.6
[ 1475.498846] ovx3c 9-0036: set max9296 init success ..., ret=0
[ 1475.498906] tegra-camrtc-capture-vi tegra-capture-vi: subdev ovx3c 9-0036 bound
[ 1534.431989] ovx3c 9-0036: set mode 0, ret=0
[ 1534.458392] tegra-camrtc-capture-vi tegra-capture-vi: corr_err: discarding frame 0, flags: 0, err_data 131072
5

Set the override_enable to verify again.

v4l2-ctl -c override_enable=1
6

It has taken effect, thank you.