Kernel Modification for adding extra SD card at SDMMC3

Autonomous Machines Jetson & Embedded Systems Jetson Nano
21

If that is the case, the imx477 camera will not work. Is there any way I can interface with imx477 without using the patch?
I saw the jetson nano 2gb module support this camera, why the 4GB needs additional patch?

22

Hi,

Asking you to fallback is just for debug. Fallback to a base that sdmmc is fine and then start to change the binaries from vendor one by one to figure out which file is causing the sdmmc regression.

Sorry that I am not working on camera case so not sure why jetson nano 2gb does not need it. Maybe @JerryChang can give you more info.

23

hello andreaswidy,

thereā€™s IMX477 sensor driver included in r32.5 public release sources.
it looks this topic talking about kernel modification for adding extra SD card at SDMMC3, please initial another new discussion thread for better supports.
thanks

24

hi @JerryChang ,

I am quite clear on the SD card addition at SDMMC3 and if IMX477 driver is supported in new release I think my problem will be solved and I do not need to open new discussion thread.
But last question to clarify, do you mean the imx477 is supported in jetpack 4.5 and l4t 32.5 for jetson nano 4GB production module? Because I tried to reflash the jetson nano production module using sdk manager with jetpack 4.5 l4t 32.5 and it does not detect the imx477 camera.
Does that mean I need to rebuild the kernel from the r32.5 public sources, replace the kernel and dtb, and then use the flash.sh script?
Do I need to apply patches? I saw there is patch for 2GB to support IMX477

25

hello andreaswidy,

yes, itā€™ll need additional patches to make IMX477 works with Jetson Nano on r32.4.4;
as you can see from download center, this is added by the last minute update, which makes RPi IMX477 Support Nano 2GB.

according to Topic 166585, youā€™ll need to generate bootloader payload update for making IMX477 works, please also refer to that thread for the steps to make it works on JetPack-4.5,
thanks

27

Hi @JerryChang ,

I try downloading the ā€œRPi_IMX477_Support_Nano_2GBā€ tar file.
From the thread I can understand that we basically need to just copy the payload to the /usr/bin on jetson nano and copy the libnvodm_imager.so.
However this tar files explicitly said it only works for Jetson Nano 2GB Developer Kit.
With the same method can it work with Jetson Nano Production Module 4GB? or is there different way?

30

hello andreaswidy,

FYI, we had a quick check locally, those binaries does not support with JP-4.5/ IMX477/ Nano 4GB.
apparently, the corresponding device tree change for Nano 4GB did not included.
weā€™re having internal discussion, shall update the thread after we come out conclusions,
thanks

1 Like
31

hello andreaswidy,

hereā€™s another FYI,

according to Raspberry Pi HQ camera IMX477 Linux driver for Jetson.
you may also refer to [Compatibility with NVIDIAĀ®Jetsonā„¢ Platforms] session.

The Raspberry Pi HQ camera module requires a hardware modification in order to work with Jetson Platforms; Both Jetson Nano and Jetson Xavier NX provides 1.8V for reset GPIO in the camera interface, but the camera module requires 3.3V.

hence, Raspberry-Pi High Def camera (IMX477) it only works with Nano 2GB Developer Kit currently without hardware rework.

since thereā€™s already IMX477 kernel driver included in JetPack release package,
the camera hardware without reworks should able to bring-up on Nano 4GB, Tx2 or NX.
please contact with Jetson Camera Partners for such camera solutions.

please do note that,
weā€™re now release package through download center to make IMX477 works only on Nano 2GB.
thanks

32

Hi @JerryChang,

Yes I already know about the hardware rework.
But I do not think that is the case here, since If you pay attention to my previous post I already manage to get the IMX477 camera working with Jetson Nano by installing debian package from arducam driver, but this method overwrite the DTB changes for SD card, so I can make both camera and sd card work separately but cannot combine it, so I do not think hardware is the issues here.
As for now, I do not plan to use Jetson Nano 2GB, I am using Jetson Nano 4GB production module.
I already use the recent jetpack 32.5 and flash it using sdkmanager to my Jetson Nano 4GB production module, it does not detect the IMX477 connected to my board.
So do you have any direction that i can follow? if there is kernel driver I do not think it is enabled, do you have a dtb with working camera imx477 for Jetson Nano 4GB Production Module.

33

please contact with Arducam for latest r32.5 release package for IMX477,

as I mentioned previously, please initial another new discussion thread for better supports.

34

Hey @WayneWWW and @JerryChang ,

I want to thank both of you now the system is working fine.
Currently I use the arducam image and modify the dtb file.
The modification on top of the modification mentioned on the other forum is to delete :
//nvidia,min-tap-delay = <0x6a>;
//nvidia,max-tap-delay = <0xb9>;
(I am not sure what this do)
But after i comment out this one, everything works fine.
So thank you for the time and help, appreciate it.

Regards,
Widy