I2C error on Jetson Nano

[s.hall]

Hi Community

I am putting together a stereo camera platform using two Alvium 1800-158C cameras (IMX273 sensor) allied vision github and a Jetson Nano. I have a custom carrier board with two 22pin MIPI connectors to connect to the cameras which is based on the Ant Micro open source Jetson baseboard Ant Micro Github.

I have followed the instructions to build and install the Alvium drivers on the Jetson Nano. However I have a few errors that must be rectified.

From the kernel log
[ 0.601800] i2c i2c-6: of_i2c: modalias failure on /host1x/i2c@546c0000/avt_pca9548@70
[ 1.179065] avt_csi2 0-003c: No camera detected
[ 1.184066] avt_csi2 6-003c: No camera detected
[ 11.127224] tegra-i2c 7000c700.i2c: rx dma timeout txlen:28 rxlen:128
[ 11.133675] tegra-i2c 7000c700.i2c: — register dump for debugging ----
[ 11.140391] tegra-i2c 7000c700.i2c: I2C_CNFG - 0x22c00
[ 11.145529] tegra-i2c 7000c700.i2c: I2C_PACKET_TRANSFER_STATUS - 0x10001
[ 11.152226] tegra-i2c 7000c700.i2c: I2C_FIFO_CONTROL - 0x1c
[ 11.157795] tegra-i2c 7000c700.i2c: I2C_FIFO_STATUS - 0x800040
[ 11.163624] tegra-i2c 7000c700.i2c: I2C_INT_MASK - 0x6c
[ 11.168846] tegra-i2c 7000c700.i2c: I2C_INT_STATUS - 0x2
[ 11.174180] tegra-i2c 7000c700.i2c: i2c transfer timed out addr: 0x50

I believe I need to update the device tree files to reflect the
I have a few questions:

1. What does the modalias failure mean and what can cause it?
2. How can I start to debug the i2c error register dump?

I have not been able to find relevant documentation for either error and would appreciate any help.

If you need clarification on something, please let me know.

Thanks

[ShaneCCC]

1, It could be the driver name didn’t match to device tree.
2. Suggest consult with vendor to help on it.

[s.hall]

Where should I look to confirm whether the driver name matches the device tree?

[ShaneCCC]

The driver should have define the driver string.

 static const struct i2c_device_id ov5693_id[] = {
1240  	{ "ov5693", 0 },
1241  	{ }
1242  };
1243  
1244  MODULE_DEVICE_TABLE(i2c, ov5693_id);
1245  
1246  static struct i2c_driver ov5693_i2c_driver = {
1247  	.driver = {
1248  		.name = "ov5693",
1249  		.owner = THIS_MODULE,
1250  		.of_match_table = of_match_ptr(ov5693_of_match),
1251  	},
1252  	.probe = ov5693_probe,
1253  	.remove = ov5693_remove,
1254  	.id_table = ov5693_id,
1255  };
1256  module_i2c_driver(ov5693_i2c_driver);

[s.hall.blueprintlab]

Where is this file?

[ShaneCCC]

It’s reference sensor kernel driver.

[s.hall]

Ok thanks for that Shane

I just put a fresh JetPack 4.6.1 image onto a TX2-NX using the ./flash script with the board set as the . This does not have the Alvium drivers installed and the error is still present.
Can you please help me understand the debug register dump?
What does this information mean?

[Bibek]

It means the i2c transfer on this bus has timed out. mostly due to some slave is bad in the line and may be pulling the line low.