How to get csi video stream from ds90ub964

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

Hi everyone!
I have a camera board designed by myself.I used a ds90ub964 to deserialize the fpdlink-iii to CSI.I’ve detected the i2c slave device(with i2c address 0x30) with i2c-tools,and i can read and write the ds90ub964’s registers throuth i2cdump and i2cset commands.I have configed ds90ub964 to generate pattern,how can i test the csi stream on Jetson AGX Xavier?

2

hello sunzhongmeng,

may I know what’s the pixel formats of your bridge device outputting.
suggest you could running the v4l2-ctl application which using V4L2 IOCTL directly for testing.
please refer to [Release 32.1 Development Guide]-> Camera Software Development Solution chapter for details.
thanks

3

Hi,Jerry the pattern is 8 color bars with the format 720p/30/RGB888.
the v4l2 IOCTL example capture from a Bayer sensor with the format 1080p/30/RG10 like this:

v4l2-ctl --set-fmt-video=width=1920,height=1080,pixelformat=RG10 --stream-mmap --stream-count=1 -d /dev/video0 --stream-to=ov5693.raw

but I don’t have driver ,so I can’t find video* in /dev.I just configured the ds90ub964 through the i2ctools.

4

hello sunzhongmeng,

DS90UB964 is one of Serializer/Deserializer device.
since it connected to Tegra’s CSI port, from software side still consider it as MIPI signaling.
in general, bridge driver also support test-pattern-generator.
you should enable TPG buffer to confirm the connection is functional, please also contact your bridge vendor to understand the configuration.
thanks

5

Hi，Jerry，
yes,ds90ub964 is deserializer device,I have configured it’s regs to generate pattern (according to the datasheet).
I have enableed the TPG：

sudo insmod /lib/modules/4.9.140-tegra/kernel/drivers/media/platform/tegra/tpg/nvhost-vi-tpg-t19x.ko

and then:

gst-launch-1.0 nvarguscamerasrc sensor-id=1 ! 'video/x-raw(memory:NVMM),width=1920, height=1080, framerate=30/1, format=NV12' ! nvoverlaysink -ev

there’s a pattern shows on the monitor.But i don’t think it’s the ds90ub964’s pattern.

6

hello sunzhongmeng,

that’s right, you had enable tegra-vi test-pattern-generator, which generated from CSI hardware.
please access [Xavier Series (SoC) Technical Reference Manual] from Jetson Download Center,
please refer to [Multimedia Complex]-> [MIPI Camera Serial Interface (CSI)]-> [NVCSI CORE Block Diagram] for the TPG unit.

you should contact with your vendor for the drivers and steps to configure DS90UB964.
thanks

7

I don’t think the TPG unit can test the CSI port of Xavier,
External Media
csi data is comming frome NVCSI CIL.
I have asked the vendor,they didn’t have the drivers for ds90ub964.