Multi Argus cameras set sensor exposure issue

Robotics & Edge Computing Jetson & Embedded Systems Jetson AGX Orin
1

Hi Nvidia，
Orin Devkit, JP5.1.4
I have two raw cameras, and when opening video0(s56 30-001b)/video1(s56 30-001c) separately through the V4L2 program(qv4l2) and setting parameters like gain and exposure, the configuration is correctly written to each sensor.

The functions cam_gmsl_set_gain and cam_gmsl_set_exposure would be called in the driver like this.

static struct tegracam_ctrl_ops cam_gmsl_ctrl_ops = {
	.numctrls = ARRAY_SIZE(ctrl_cid_list),
	.ctrl_cid_list = ctrl_cid_list,
	.set_gain = cam_gmsl_set_gain,
	.set_exposure = cam_gmsl_set_exposure,
	.set_frame_rate = cam_gmsl_set_frame_rate,
	.set_group_hold = cam_gmsl_set_group_hold,
};

[ 4947.855645] bwmgr API not supported
[ 4955.405548] s56 30-001b: cam_gmsl_set_gain: addr=0xca1,val=0x08,
[ 4961.301525] s56 30-001b: cam_gmsl_set_exposure: addr=0xca3,val=0x00,
[ 4961.301531] s56 30-001b: cam_gmsl_set_exposure: addr=0xca2,val=0x16,
[ 4964.890440] bwmgr API not supported
[ 5058.541015] bwmgr API not supported
[ 5058.556734] s56 30-001c: cam_gmsl_set_gain: addr=0xca1,val=0x0c,
[ 5058.561256] s56 30-001c: cam_gmsl_set_exposure: addr=0xca3,val=0x0d,
[ 5058.561259] s56 30-001c: cam_gmsl_set_exposure: addr=0xca2,val=0x08,

However, when using argus_camera -d 0 or 1 to open any camera, the driver log shows that only the gain and exposure functions of video1 (s56 30-001c) are being called. and the displayed image is correctly.

[ 3569.110909] s56 30-001c: cam_gmsl_set_gain: addr=0xca1,val=0x08,
[ 3569.115495] s56 30-001c: cam_gmsl_set_exposure: addr=0xca3,val=0x0d,
[ 3569.115497] s56 30-001c: cam_gmsl_set_exposure: addr=0xca2,val=0x08,

In my opinion, when using argus_camera -d 0 command, driver log shows s56 30-001b like v4l2 methord,
I think this might be related to Argus. Please provide some suggestions. Thank you.

3

What’s the problem?

4

My problem is that in the case of multiple cameras, libargus is unable to correctly invoke the gain and exposure function of the corresponding sensor driver. but v4l2 is ok

5

That cold be the sensor driver problem. Like the gain/exposure not linearity.

BTW, single camera working well??

6

是的，
驱动中tegracam_ctrl_ops 下的增益及曝光函数，无论单相机或多相机，在v4l2调用时都可以正常调用到对应相机的驱动函数。
使用argus测试相机时，多相机存在时，只有最后一个相机的驱动增益曝光函数被自动调用到。
还是不能理解我的问题吗 :(

7

I don’t think that’s a problem.
AE alg set the gain/exposure depend on the scene light. You need to change the scene light to trigger the gain/exposure.

8

但是多相机同时点亮时，每个相机拍摄的场景不一样，不同相机需要调整的gain/exposure值自然不一样；
正常情况下不应该是每个相机像v4l2方式一样能调用自己的驱动去设置这些参数吗

9

Yes, I think the behavior is like you said. If not it could be your sensor driver problem.

10

因为我的sensor driver 增益/曝光的设置在V4L2方式下调用是正常的，所以我觉得可能不是sensor driver的问题

11

You can verify the setting like v4l2-ctl by set the gain/exposure range. Like set the gain range to 8 - 8 …

12

我前面提到了使用qv4l2程序测试，也就是v4l2方式验证是ok的；
后续我可以尝试使用多个imx219/imx477等mipi相机测试，看是否能复现我的问题

14

This topic was automatically closed 14 days after the last reply. New replies are no longer allowed.