Xavier Dtb / Dts / Dtsi, anyone compiled their own device tree, need some hints ? (Solved)

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

It’s the :
tegra194-p2822-camera-module.dtsi
tegra194-p2822-0000-a00.dtsi

That is used in this Xavier release ?
Almost done with the camera porting (i think) but need to know where to include my dtsi’s

Couldn’t find any info on it yet…

2

And by the looks of it, it seems there are some changes coming to the camera driver and / or their placement, is there a new porting guide somewhere, couldn’t find it, but might be a bit early …

3

Could you help to check the 31.1 l4t-document to check if any unmatch need to modify.

4

Hi @ShaneCCC
Yes, have checked the documentation, and that is what makes me confused:)
I have edited the dtsi file and compiled it, but have a look here, this is from the Xavier doc:

CHIPID=0x19;
EMMC_CFG=flash_t194_sdmmc.xml;
BOOTPARTSIZE=8388608;
EMMCSIZE=31276924928;
ITS_FILE=;
SYSBOOTFILE=p2972-0000/extlinux.conf;
BPFDTB_FILE=tegra194-a01-bpmp-p2888-a01.dtb;
DTB_FILE=tegra194-p2888-0001-p2822-0000.dtb; <---- Is this the one i should flash ?
TBCDTB_FILE=tegra194-p2888-0001-p2822-0000.dtb;
TBCDTB_FILE=tegra186-quill-p3310-1000-a00-00-base.dtb; <---- why is tegra186 (tx2) in here ?

and later in the Xavier doc:

Device Tree Nodes
If you are not using any controller from Tegra SoC, disable the Device Tree nodes for those device tree entries. The device tree directory is available at:
/hardware/nvidia/platform/t18x/ <------ again t18x, is this a typo in the doc ?
/hardware nvidia/soc/t18x
The DTB that is flashed is available at:
/hardware/nvidia/platform/t18x/quill/kernel-dts/tegra186-quill-p3310-1000-a00-00-base.dts <---- tegra186 ??

So would be really nice if you could tell me which DTB to flash, so i don’t need to do a full reflash after i brick it :)

5

@Spawn
Looks like the document is out of date for Xavier, thanks for pointing out.
The DTB file should be the tegra194-p2888-0001-p2822-0000.dtb, you can also check the …/Linux_for_tegra/bootloader/flash.xml to know the correct information.

6

@Spawn
Could you tell which document did you check?

7

Hi ShaneCCC,

It is from:
NVIDIA Tegra Linux Driver Package

Development Guide
31.0.1 Release

I re downloaded it to be sure i have the latest version, and it still has the outdated text.

Thanks for your help, will flash dtb later today.