We are using the Jetson CSI interface to receive YUV data, but we found a very strange problem. When we used the test data (counter) 00 01 02 03 04, we found that the order of data received from v4l2 was different for different data formats. As shown in the figure below: [image] The data sent by…

Thanks for your reply. In fact, we are using Jetson Orin Nano Devkit for testing. Maybe we can switch to other platforms such as Orin NX or AGX Orin. In addition, we will confirm whether there is a problem with FPGA.

Yes, we modified the format in the driver, so we can get the data in a different format. Also we did not use gst pipeline, we used v4l2-ctl command to get the data, for example: v4l2-ctl --set-fmt-video=width=1920,height=1080,pixelformat=YUYV --stream-mmap --stream-count=1 --stream-to=test.yuv

hello t_msg, in reality, you should configure the format types as same as your sensor output. please check whether it behavior the same with correct settings.

Yes, this is the starting point for us to find this problem. At first, we set the format in the driver to the actual format, but got the wrong result, so we did the above test. In our understanding, no matter what the driver format is, it should keep the data consistent with the input. We can’t und…

hello t_msg, let’s focus on this.. [image] t_msg: At first, we set the format in the driver to the actual format, but got the wrong result, so we did the above test. may I know what’s the sensor output formats, and what’s the pixelformat you’ve used. please also examine sensor format dump …

The output of the sensor is YUYV, and we also set the driver to YUYV: [image] We have verified this sensor on other platforms (e.g. raspberrypi) so we can ensure that its format is correct. Is there any difference between third-party software and v4l2-ctl? In our understanding, v4l2-ctl should be…

Update: According to the order of previous tests, we found that we only need to configure the Sensor to UYVY, and the image will be normal no matter what the driver format is. Jetson seems to think that the YUV input format must be UYVY, and then it will adjust the pixel order according to the dri…

Yes, we confirmed that the device tree format is correct, and we also tried to change it to other formats, and the test results did not change

hello t_msg, [image] t_msg: we found that we only need to configure the Sensor to UYVY, may I double confirm what’s the sensor’s output pixel formats. also, what’s the sensor you’re working with.

Of course, this is the device tree configuration: mode0 { mclk_khz = "24000"; num_lanes = "2"; tegra_sinterface = "serial_b"; phy_mode = "DPHY"; discontinuous_clk = "yes"; dpcm_enable = "false"; cil_settletime = "0"; lane_polarity = "6"; active_w = "1280"; active_h = "720"; mode_type = "…

Jetson Orin Nano YUV V4l2 data order

Robotics & Edge Computing Jetson Systems Jetson Orin Nano

JerryChang June 19, 2024, 2:23am 10

hello t_msg,

it looks related to Topic 273771.

please see-also VI driver,
i.e. $public_sources/kernel_src/kernel/nvidia/drivers/media/platform/tegra/camera/sensor_common.c
here’s conversion from device tree properties as v4l formats, do you have correct settings?
for instance, mode_type + pixel_phase + csi_pixel_bit_depth.

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Jetson Orin Nano YUV V4l2 data order

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