Jetson Orin Nano i2c error

[chen.xi]

We have a orin nano module in hand. On the carrier board of DK, pin3 and pin5 external I2C devices cannot get the device address.
A device address of 0x50 is available on other modules.
The following information is about the system.

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:~$ sudo i2cdetect -r -y 7
     0  1  2  3  4  5  6  7  8  9  a  b  c  d  e  f
00:          -- -- -- -- -- -- -- -- -- -- -- -- --
10: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
20: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
30: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
40: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
50: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
60: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
70: -- -- -- -- -- -- -- --
nvidia@nvidia-desktop:~$ i2cdetect -l
i2c-3   i2c             3190000.i2c                             I2C adapter
i2c-10  i2c             i2c-2-mux (chan_id 1)                   I2C adapter
i2c-1   i2c             c240000.i2c                             I2C adapter
i2c-8   i2c             31e0000.i2c                             I2C adapter
i2c-6   i2c             31c0000.i2c                             I2C adapter
i2c-4   i2c             Tegra BPMP I2C adapter                  I2C adapter
i2c-11  i2c             NVIDIA SOC i2c adapter 0                I2C adapter
i2c-2   i2c             3180000.i2c                             I2C adapter
i2c-0   i2c             3160000.i2c                             I2C adapter
i2c-9   i2c             i2c-2-mux (chan_id 0)                   I2C adapter
i2c-7   i2c             c250000.i2c                             I2C adapter
i2c-5   i2c             31b0000.i2c                             I2C adapter

At the same time, the system dmesg has been initializing the relevant information of this i2c interface.

nvidia@nvidia-desktop:~$ sudo dmesg | grep i2c
[    4.319748] i2c /dev entries driver
[    4.323470] tegra-i2c 3160000.i2c: Adding to iommu group 2
[    4.329263] tegra-i2c c240000.i2c: Adding to iommu group 2
[    4.334974] tegra-i2c 3180000.i2c: Adding to iommu group 2
[    4.340652] tegra-i2c 3190000.i2c: Adding to iommu group 2
[    4.346332] tegra-i2c 31b0000.i2c: Adding to iommu group 2
[    4.352033] tegra-i2c 31c0000.i2c: Adding to iommu group 2
[    4.357713] tegra-i2c c250000.i2c: Adding to iommu group 2
[    4.363396] tegra-i2c 31e0000.i2c: Adding to iommu group 2
[    7.004955] i2c i2c-2: Added multiplexed i2c bus 9
[    7.010302] i2c i2c-2: Added multiplexed i2c bus 10
[    7.015334] i2c-mux-gpio cam_i2cmux: 2 port mux on 3180000.i2c adapter
[   13.224174] imx219 9-0010: imx219_board_setup: error during i2c read probe (-121)
[   13.298823] imx219 10-0010: imx219_board_setup: error during i2c read probe (-121)
[ 5684.845100] tegra-i2c c250000.i2c: un-recovered arbitration lost
[ 5684.852101] tegra-i2c c250000.i2c: un-recovered arbitration lost
[ 5684.859019] tegra-i2c c250000.i2c: un-recovered arbitration lost
[ 5684.866162] tegra-i2c c250000.i2c: un-recovered arbitration lost
[ 5684.873070] tegra-i2c c250000.i2c: un-recovered arbitration lost
[ 5684.880620] tegra-i2c c250000.i2c: un-recovered arbitration lost
[ 5684.887403] tegra-i2c c250000.i2c: un-recovered arbitration lost
[ 5684.894323] tegra-i2c c250000.i2c: un-recovered arbitration lost
[ 5684.901001] tegra-i2c c250000.i2c: un-recovered arbitration lost
[ 5684.907655] tegra-i2c c250000.i2c: un-recovered arbitration lost
[ 5684.914299] tegra-i2c c250000.i2c: un-recovered arbitration lost
[ 5684.920961] tegra-i2c c250000.i2c: un-recovered arbitration lost
[ 5684.927606] tegra-i2c c250000.i2c: un-recovered arbitration lost
[ 5684.934268] tegra-i2c c250000.i2c: un-recovered arbitration lost

Is there a good solution for this module?

[chen.xi]

Can anyone take a look?

[Jeffli]

Hi chen.xi,
Please follow this topic to check, does bus1 work?

I2C Bus 7 not working on Jetson Orin Nano Developer Kit - Jetson & Embedded Systems / Jetson Orin Nano - NVIDIA Developer Forums

[chen.xi]

Bus 1 is working.
Access the I2C chip:

root@ubuntu:/home/xrrobot# i2cdetect -y -r 1
     0  1  2  3  4  5  6  7  8  9  a  b  c  d  e  f
00:          -- -- -- -- -- -- -- -- -- -- -- -- --
10: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
20: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
30: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
40: UU -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
50: 50 -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
60: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
70: -- -- -- -- -- -- -- --

Without access to I2C chip:

root@ubuntu:/home/xrrobot# i2cdetect -y -r 1
     0  1  2  3  4  5  6  7  8  9  a  b  c  d  e  f
00:          -- -- -- -- -- -- -- -- -- -- -- -- --
10: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
20: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
30: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
40: UU -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
50: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
60: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
70: -- -- -- -- -- -- -- --

During the test, bus 7 is connected to the I2C chip,

[chen.xi]

@chen.xi

2cdetect -y -r 1

With the latest version of the system, bus 7 is still unable to get the address of the I2C chip on the devkit board.
In addition. The state of bus 1 is normal.

May I ask whether the process of RMA can be used in this case?

[KevinFFF]

Hi chen.xi,

@chen.xi

A device address of 0x50 is available on other modules.

Do you mean that only one module can’t recognize 0x50 on I2C bus 7 and showing the following errors?

[ 5684.845100] tegra-i2c c250000.i2c: un-recovered arbitration lost

[chen.xi]

Yes, this is the only one I’ve encountered so far.

[KevinFFF]

How is the fail rate in your case?
(i.e. how many modules do you have and found there’s 1 NG module)

Then I would suggest for RMA it.
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