Need help about camera regulators

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

Hi, Nvidia,
I met regulators error when system boot:
[ 4.844565] driver [ar0234] registered
[ 8.295280] probing v4l2 sensor ar0234 at addr 0x10
[ 8.301287] ar0234 2-0010: camera_common_regulator_get vana ERR: fffffffffffffdfb
[ 8.309852] ar0234 2-0010: camera_common_regulator_get vdig ERR: fffffffffffffdfb
[ 8.318308] ar0234 2-0010: ar0234_power_get: unable to get regulator(s)
[ 8.325880] ar0234 2-0010: unable to power get
[ 8.335501] ar0234 2-0010: tegra camera driver registration failed
[ 8.342765] ar0234: probe of 2-0010 failed with error -14

I have added the definition of regulators in DTS:
ar0234mipi_a@10 {
… …
/* Define any required hw resources needed by driver /
/ ie. clocks, io pins, power sources */
avdd-reg = “vana”;
iovdd-reg = “vif”;
dvdd-reg = “vdig”;

Also, I have added the supplies in DTS:
ar0234mipi_a@10 {
…
vana-supply = <&p3737_avdd_cam_2v8>;
vif-supply = <&p3737_vdd_1v8_sys>;
vdig-supply = <&p3737_vdd_sys_en>;
};

Could you help to figure out where is the issue or missing?

Thanks

3

Make sure your HW need those power control.
If not you can remove from the driver and device tree.

4

Hi ShaneCCC,
Thanks, The adapter board I used needs DVDD AVDD IOVDD from board. Could you help to guide me how to let the avdd and dvdd output from board correct?

Thanks

5

Do you define below regulator?

p3737_avdd_cam_2v8 p3737_vdd_1v8_sys p3737_vdd_sys_en
6

Hi @ShaneCCC
Yes, in the file platform/t23x/concord/kernel-dts/cvb/tegra234-p3737-fixed-regulator.dtsi has these regulator defines.

7

Please attached tegra234-p3737-fixed-regulator.dtsi here to review.

Thanks

8

tegra234-p3737-fixed-regulator.zip (1.3 KB)
Hi @ShaneCCC
attached. Thanks!

9

You may check the node to confirm the regulator.

/sys/devices/platform/regulator*

10

Hi @ShaneCCC

I got this:

nvidia@nvidia-desktop:~$ sudo ls /sys/devices/platform/regulator*
driver_override modalias power subsystem uevent

11

Didn’t show any regulator on your system.
Do you dump your device tree to confirm those define?

sudo dtc -I fs -O dts -o extracted_proc.dts /proc/device-tree

What’s your version?

12

Hi @ShaneCCC
Attach the dts parsed
extracted_proc.zip (63.3 KB)
How to check version?
Thanks

13

Hi @ShaneCCC
Is below version info wanted?
nvidia@nvidia-desktop:~$ sudo apt show nvidia-jetpack -a
[sudo] password for nvidia:
Package: nvidia-jetpack
Version: 5.1.1-b56
Priority: standard
Section: metapackages
Maintainer: NVIDIA Corporation
Installed-Size: 199 kB
Depends: nvidia-jetpack-runtime (= 5.1.1-b56), nvidia-jetpack-dev (= 5.1.1-b56)
Homepage: Jetson - Embedded AI Computing Platform | NVIDIA Developer
Download-Size: 29.3 kB
APT-Manual-Installed: yes
APT-Sources: https://repo.download.nvidia.com/jetson/common r35.3/main arm64 Packages
Description: NVIDIA Jetpack Meta Package

14

nvidia@nvidia-desktop:~$ sudo ls /sys/devices/platform/re*
/sys/devices/platform/reg-dummy:
driver driver_override modalias power regulator subsystem uevent

/sys/devices/platform/regulatory.0:
driver_override modalias power subsystem uevent

15

Below command to get the version.

cat /etc/nv_tegra_release
16

hi @ShaneCCC

nvidia@nvidia-desktop:~$ cat /etc/nv_tegra_release

R35 (release), REVISION: 3.1, GCID: 32827747, BOARD: t186ref, EABI: aarch64, DATE: Sun Mar 19 15:19:21 UTC 2023

nvidia@nvidia-desktop:~$

17

Hi @ShaneCCC
I saw from other place in this forum, there is difference between -m and -y, I did try and found if I build the driver with -m command into .ko and insmod after system booted, I can get 2.8V, but 1.2V pin is still of 0V level. (insmod way doesn’t meet camera_common_regulator_get vana ERR: fffffffffffffdfb)
Of course if build driver with -y into the kernel image, the error of very beginning of this topic is met(camera_common_regulator_get vana ERR: fffffffffffffdfb).

18

Hi @ShaneCCC
I saw a red error log in kernel dmesg trace result when streaming with ko insmod:
[ 371.909217] bwmgr API not supported
Is this related with the problem?

19

HI @ShaneCCC
the way insmod .ko is also ok for me. But by this way still I can not get 1.2V dvdd, I can only get 2.8V and 1.8V. How can I get 1.2V dvdd output at this time? Thanks.

20

Hi @ShaneCCC
I did some check below:
nvidia@nvidia-desktop:~$ sudo cat /sys/kernel/debug/regulator/vdd_sys_en/regulator/name
vdd_sys_en
nvidia@nvidia-desktop:~$ sudo cat /sys/kernel/debug/regulator/vdd_sys_en/regulator/state
enabled
nvidia@nvidia-desktop:~$ sudo cat /sys/kernel/debug/regulator/vdd_sys_en/regulator/microvolts
1200000

Does above message mean 1.2V is enabled? But why I got 0V when measuring pin 101 of P2 slot(HDR120-2x60-AP-5MM-P (QTH) )on the EVK board?

21

Hi Nvidia,
Any one can help me to get correct 1.2V dvdd for camera? I’m using AGX orin DVK. Camera is connected to P2 slot(HDR120-2x60-AP-5MM-P (QTH) ) of the DVK board.