How to support multiple cameras on different I2C bus

Robotics & Edge Computing Jetson & Embedded Systems Jetson TX1
1

Dear all,

Due to we could not run my camera on TX2 at 30fps so we have to come back TX1 for temporary solution.
On TX2, we have 3 cameras on these I2C bus

i2c@3180000 : I2C3
i2c@31c0000 : I2C7
i2c@31e0000 : I2C9

On TX1 as we checked, camera driver only was probed when assigned it to this address i2c@546c0000. We already try the other address such as i2c@7000C400, i2c@7000C500, … but camera driver was not probed.

Is it possible to run multiple cameras on different I2C bus for configuration on TX1?

Thanks and Best Regards,
Vu Nguyen

2

@forever
It’s no problem to support on TX1. There’s no any different with TX2 for this part.

3

Hi ShaneCCC,

How about the I2C port and address. Because as I checked it’s so different and when I try to assign other camera to the other i2c address such as i2c@7000C400, i2c@7000C500, … then camera driver was not probed.

I checked almost example device tree but could not find how to assign the other i2c address instead i2c@546c0000.

Thanks and Best Regards,
Vu Nguyen

4

Hi,

Currently I could run one camera as well. However the other two cameras were connected at those pins

C10
I2C_GP2_DAT (RSVD) 
I2C_GP2_DAT
−
C11
I2C_GP2_CLK (RSVD) 
I2C_GP2_CLK
−
C12
I2C_GP3_CLK (RSVD) 
I2C_GP3_CLK
−
C13
I2C_GP3_DAT (RSVD) 
I2C_GP3_DAT

On TX2 those I2C can work well but I’m not sure about (RSVD) on TX1.

Thanks

5

Hi forever3000,

Ensure i2c node is placed outside host1x in the dtsi file.

Regards,
Rejeesh

6

Hi Vu Nguyen,

Ensure i2c node is placed outside host1x in the dtsi file.

Regards,
Rejeesh