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EDM-IMX95 TEVS Camera Usage Guide

🚀 Introduction​

This article guides you how to get started using TechNexion camera modules on EDM-IMX95 EVM board.

Background knowledge needed

You must have the background knowledge to modify the kernel configuration, rebuild, and replace the kernel and the device tree source (DTS).

e.g. IMX95-EVM Baseboard

This article uses the IMX95-EVM baseboard as an example, based on the 🔗 Yocto 5.0 (Scarthgap) 2025Q2 Release. The corresponding Linux kernel version is 6.6.52_2.2.0.

📸 Supported Camera Modules​

Camera SeriesProducts
TEVS
TEVS-AR0144
TEVS-AR0145
TEVS-AR0234
TEVS-AR0521
TEVS-AR0522
TEVS-AR0821
TEVS-AR0822
TEVS-AR1335

🧩 Supported Boards​

SoMBoard
EDM-IMX95IMX95-EVM

🔧 Hardware Setup Instructions​

1. Power Supply Preparation​

  • Use a DC 5V or 12V power cable to supply power to the board.
  • If you're using FPD-Link III SerDes, a 12V power adapter (minimum 3A) is required. Connect it via the barrel jack connector.

2. Debug Console Connection​

  • Prepare a USB-to-UART cable if you're connecting to a PC.
  • Connect it to the UART_A_A55 connector.

3. Display Output Connection​

  • Prepare a 10.1 inch LVDS panel for output display.
  • Connect the display to the LVDS connector on the board.

4. Camera Interface (CSI) Overview​

  • The board features two MIPI-CSI-2 interfaces, referred to as CSI1 and CSI2.
  • These use 70-pin board-to-board connectors manufactured by Hirose.
  • The image below shows a TEVS camera connected to the CSI2 interface.
Figure 1. TEVS camera module plugged into the CSI2 connector using a ribbon cable.

CSI2 Switch

If you are using the CSI2 connector, please remember to set the SW2 switch to the ON position to enable it.

Figure 2. TEVS camera module plugged into the CSI1 connector using a ribbon cable.

💻 Prepare Yocto demo image for testing TechNexion camera​

To test TechNexion cameras, you will need a Yocto-based demo image that includes the necessary device tree blobs and camera drivers.

🔽 Downloading the Demo Image​

Prebuilt demo images are available for download on TechNexion's official server.

🔗 Supported Release List

💾 Flashing the Image​

You can flash the image to either e.MMC or an SD Card using one of the following methods:

1. Using uuu Tool (Universal Update Utility)​

TechNexion provides a guide to flash the image using the uuu tool: 🔗 How to Flash with UUU

Boot Mode

Before flashing, ensure the board is set to Serial Download Mode in the boot configuration.

2. Using ums Command in U-Boot (USB Mass Storage)​

Alternatively, you can write the image directly to flash storage over USB-OTG using U-Boot’s ums command: 🔗 Using UMS in U-Boot

U-Boot Requirement

The board must be booted with a version of U-Boot that supports the ums command. Typically, this is done from the existing e.MMC.

🛠️ Build Yocto​

TechNexion supports building a Yocto-based Linux image tailored for camera modules using the following kernel and branch.

📦 Supported Linux Kernel​

Linux Kernel VersionYocto Branch
6.6.52tn-imx_6.6.52_2.2.0-stable

📁 Source and Build Instructions​

🔗 Fetch Yocto Source
📖 Build Yocto (Instructions for EDM-IMX95)

📸 Camera Testing Instructions​

Specify Camera DTBO in U-Boot​

  1. Connect the debug console cable to carrier board.

  2. Power on the board and interrupt the boot process. Keep pressing Enter when the following message appears: Hit any key to stop autoboot:

  3. Specify the appropriate device tree for your camera using the fdtfile environment variable in U-Boot:

u-boot=> setenv fdtfile imx95-edm-evm-tevs.dtb
  1. Continue boot process.
u-boot=> saveenv
u-boot=> boot
About device tree Blob

The provided DTBs include configuration for a 10.1-inch LVDS display panel. This allows the system to output video, which is useful for verifying camera streaming on screen.

Setup the media controller before camera streaming​

To verify that the camera has been properly connected and linked, use the media-ctl command:

$ media-ctl -p

This will display media controller information, such as:

    Media controller API version 6.6.52

    Media device information
    ------------------------
    driver          mxc-isi
    model           FSL Capture Media Device
    serial
    bus info        platform:4ad50000.isi
    hw revision     0x0
    driver version  6.6.52
    Device topology
    - entity 1: crossbar (13 pads, 9 links, 8 routes)
                type V4L2 subdev subtype Unknown flags 0
                device node name /dev/v4l-subdev0
            routes:
                    2/0 -> 5/0 [ACTIVE]
                    2/0 -> 6/0 [ACTIVE]
                    2/0 -> 7/0 [ACTIVE]
                    2/0 -> 8/0 [ACTIVE]
                    2/0 -> 9/0 [ACTIVE]
                    2/0 -> 10/0 [ACTIVE]
                    2/0 -> 11/0 [ACTIVE]
                    2/0 -> 12/0 [ACTIVE]
            pad0: Sink
            pad1: Sink
            pad2: Sink
                    [stream:0 fmt:UYVY8_1X16/1920x1080 field:none colorspace:srgb xfer:srgb ycbcr:601 quantization:lim-range]
                    <- "4ac10000.syscon:formatter@20":1 [ENABLED,IMMUTABLE]
            pad3: Sink
            pad4: Sink
            pad5: Source
                    [stream:0 fmt:UYVY8_1X16/1920x1080 field:none colorspace:srgb xfer:srgb ycbcr:601 quantization:lim-range]
                    -> "mxc_isi.0":0 [ENABLED,IMMUTABLE]
            pad6: Source
                    [stream:0 fmt:UYVY8_1X16/1920x1080 field:none colorspace:srgb xfer:srgb ycbcr:601 quantization:lim-range]
                    -> "mxc_isi.1":0 [ENABLED,IMMUTABLE]
            pad7: Source
                    [stream:0 fmt:UYVY8_1X16/1920x1080 field:none colorspace:srgb xfer:srgb ycbcr:601 quantization:lim-range]
                    -> "mxc_isi.2":0 [ENABLED,IMMUTABLE]
            pad8: Source
                    [stream:0 fmt:UYVY8_1X16/1920x1080 field:none colorspace:srgb xfer:srgb ycbcr:601 quantization:lim-range]
                    -> "mxc_isi.3":0 [ENABLED,IMMUTABLE]
            pad9: Source
                    [stream:0 fmt:UYVY8_1X16/1920x1080 field:none colorspace:srgb xfer:srgb ycbcr:601 quantization:lim-range]
                    -> "mxc_isi.4":0 [ENABLED,IMMUTABLE]
            pad10: Source
                    [stream:0 fmt:UYVY8_1X16/1920x1080 field:none colorspace:srgb xfer:srgb ycbcr:601 quantization:lim-range]
                    -> "mxc_isi.5":0 [ENABLED,IMMUTABLE]
            pad11: Source
                    [stream:0 fmt:UYVY8_1X16/1920x1080 field:none colorspace:srgb xfer:srgb ycbcr:601 quantization:lim-range]
                    -> "mxc_isi.6":0 [ENABLED,IMMUTABLE]
            pad12: Source
                    [stream:0 fmt:UYVY8_1X16/1920x1080 field:none colorspace:srgb xfer:srgb ycbcr:601 quantization:lim-range]
                    -> "mxc_isi.7":0 [ENABLED,IMMUTABLE]

    - entity 15: mxc_isi.0 (2 pads, 2 links, 0 routes)
                 type V4L2 subdev subtype Unknown flags 0
                 device node name /dev/v4l-subdev1
            pad0: Sink
                    [stream:0 fmt:UYVY8_1X16/1920x1080 field:none colorspace:jpeg xfer:srgb ycbcr:601 quantization:full-range
                     compose.bounds:(0,0)/1920x1080
                     compose:(0,0)/1920x1080]
                    <- "crossbar":5 [ENABLED,IMMUTABLE]
            pad1: Source
                    [stream:0 fmt:YUV8_1X24/1920x1080 field:none colorspace:jpeg xfer:srgb ycbcr:601 quantization:full-range
                     crop.bounds:(0,0)/1920x1080
                     crop:(0,0)/1920x1080]
                    -> "mxc_isi.0.capture":0 [ENABLED,IMMUTABLE]

    - entity 18: mxc_isi.0.capture (1 pad, 1 link)
                 type Node subtype V4L flags 0
                 device node name /dev/video0
            pad0: Sink
                    <- "mxc_isi.0":1 [ENABLED,IMMUTABLE]

    - entity 26: mxc_isi.1 (2 pads, 2 links, 0 routes)
                 type V4L2 subdev subtype Unknown flags 0
                 device node name /dev/v4l-subdev2
            pad0: Sink
                    [stream:0 fmt:UYVY8_1X16/1920x1080 field:none colorspace:jpeg xfer:srgb ycbcr:601 quantization:full-range
                     compose.bounds:(0,0)/1920x1080
                     compose:(0,0)/1920x1080]
                    <- "crossbar":6 [ENABLED,IMMUTABLE]
            pad1: Source
                    [stream:0 fmt:YUV8_1X24/1920x1080 field:none colorspace:jpeg xfer:srgb ycbcr:601 quantization:full-range
                     crop.bounds:(0,0)/1920x1080
                     crop:(0,0)/1920x1080]
                    -> "mxc_isi.1.capture":0 [ENABLED,IMMUTABLE]

    - entity 29: mxc_isi.1.capture (1 pad, 1 link)
                 type Node subtype V4L flags 0
                 device node name /dev/video1
            pad0: Sink
                    <- "mxc_isi.1":1 [ENABLED,IMMUTABLE]

    - entity 37: mxc_isi.2 (2 pads, 2 links, 0 routes)
                 type V4L2 subdev subtype Unknown flags 0
                 device node name /dev/v4l-subdev3
            pad0: Sink
                    [stream:0 fmt:UYVY8_1X16/1920x1080 field:none colorspace:jpeg xfer:srgb ycbcr:601 quantization:full-range
                     compose.bounds:(0,0)/1920x1080
                     compose:(0,0)/1920x1080]
                    <- "crossbar":7 [ENABLED,IMMUTABLE]
            pad1: Source
                    [stream:0 fmt:YUV8_1X24/1920x1080 field:none colorspace:jpeg xfer:srgb ycbcr:601 quantization:full-range
                     crop.bounds:(0,0)/1920x1080
                     crop:(0,0)/1920x1080]
                    -> "mxc_isi.2.capture":0 [ENABLED,IMMUTABLE]

    - entity 40: mxc_isi.2.capture (1 pad, 1 link)
                 type Node subtype V4L flags 0
                 device node name /dev/video2
            pad0: Sink
                    <- "mxc_isi.2":1 [ENABLED,IMMUTABLE]

    - entity 48: mxc_isi.3 (2 pads, 2 links, 0 routes)
                 type V4L2 subdev subtype Unknown flags 0
                 device node name /dev/v4l-subdev4
            pad0: Sink
                    [stream:0 fmt:UYVY8_1X16/1920x1080 field:none colorspace:jpeg xfer:srgb ycbcr:601 quantization:full-range
                     compose.bounds:(0,0)/1920x1080
                     compose:(0,0)/1920x1080]
                    <- "crossbar":8 [ENABLED,IMMUTABLE]
            pad1: Source
                    [stream:0 fmt:YUV8_1X24/1920x1080 field:none colorspace:jpeg xfer:srgb ycbcr:601 quantization:full-range
                     crop.bounds:(0,0)/1920x1080
                     crop:(0,0)/1920x1080]
                    -> "mxc_isi.3.capture":0 [ENABLED,IMMUTABLE]

    - entity 51: mxc_isi.3.capture (1 pad, 1 link)
                 type Node subtype V4L flags 0
                 device node name /dev/video3
            pad0: Sink
                    <- "mxc_isi.3":1 [ENABLED,IMMUTABLE]

    - entity 59: mxc_isi.4 (2 pads, 2 links, 0 routes)
                 type V4L2 subdev subtype Unknown flags 0
                 device node name /dev/v4l-subdev5
            pad0: Sink
                    [stream:0 fmt:UYVY8_1X16/1920x1080 field:none colorspace:jpeg xfer:srgb ycbcr:601 quantization:full-range
                     compose.bounds:(0,0)/1920x1080
                     compose:(0,0)/1920x1080]
                    <- "crossbar":9 [ENABLED,IMMUTABLE]
            pad1: Source
                    [stream:0 fmt:YUV8_1X24/1920x1080 field:none colorspace:jpeg xfer:srgb ycbcr:601 quantization:full-range
                     crop.bounds:(0,0)/1920x1080
                     crop:(0,0)/1920x1080]
                    -> "mxc_isi.4.capture":0 [ENABLED,IMMUTABLE]

    - entity 62: mxc_isi.4.capture (1 pad, 1 link)
                 type Node subtype V4L flags 0
                 device node name /dev/video4
            pad0: Sink
                    <- "mxc_isi.4":1 [ENABLED,IMMUTABLE]

    - entity 70: mxc_isi.5 (2 pads, 2 links, 0 routes)
                 type V4L2 subdev subtype Unknown flags 0
                 device node name /dev/v4l-subdev6
            pad0: Sink
                    [stream:0 fmt:UYVY8_1X16/1920x1080 field:none colorspace:jpeg xfer:srgb ycbcr:601 quantization:full-range
                     compose.bounds:(0,0)/1920x1080
                     compose:(0,0)/1920x1080]
                    <- "crossbar":10 [ENABLED,IMMUTABLE]
            pad1: Source
                    [stream:0 fmt:YUV8_1X24/1920x1080 field:none colorspace:jpeg xfer:srgb ycbcr:601 quantization:full-range
                     crop.bounds:(0,0)/1920x1080
                     crop:(0,0)/1920x1080]
                    -> "mxc_isi.5.capture":0 [ENABLED,IMMUTABLE]

    - entity 73: mxc_isi.5.capture (1 pad, 1 link)
                 type Node subtype V4L flags 0
                 device node name /dev/video5
            pad0: Sink
                    <- "mxc_isi.5":1 [ENABLED,IMMUTABLE]

    - entity 81: mxc_isi.6 (2 pads, 2 links, 0 routes)
                 type V4L2 subdev subtype Unknown flags 0
                 device node name /dev/v4l-subdev7
            pad0: Sink
                    [stream:0 fmt:UYVY8_1X16/1920x1080 field:none colorspace:jpeg xfer:srgb ycbcr:601 quantization:full-range
                     compose.bounds:(0,0)/1920x1080
                     compose:(0,0)/1920x1080]
                    <- "crossbar":11 [ENABLED,IMMUTABLE]
            pad1: Source
                    [stream:0 fmt:YUV8_1X24/1920x1080 field:none colorspace:jpeg xfer:srgb ycbcr:601 quantization:full-range
                     crop.bounds:(0,0)/1920x1080
                     crop:(0,0)/1920x1080]
                    -> "mxc_isi.6.capture":0 [ENABLED,IMMUTABLE]

    - entity 84: mxc_isi.6.capture (1 pad, 1 link)
                 type Node subtype V4L flags 0
                 device node name /dev/video6
            pad0: Sink
                    <- "mxc_isi.6":1 [ENABLED,IMMUTABLE]

    - entity 92: mxc_isi.7 (2 pads, 2 links, 0 routes)
                 type V4L2 subdev subtype Unknown flags 0
                 device node name /dev/v4l-subdev8
            pad0: Sink
                    [stream:0 fmt:UYVY8_1X16/1920x1080 field:none colorspace:jpeg xfer:srgb ycbcr:601 quantization:full-range
                     compose.bounds:(0,0)/1920x1080
                     compose:(0,0)/1920x1080]
                    <- "crossbar":12 [ENABLED,IMMUTABLE]
            pad1: Source
                    [stream:0 fmt:YUV8_1X24/1920x1080 field:none colorspace:jpeg xfer:srgb ycbcr:601 quantization:full-range
                     crop.bounds:(0,0)/1920x1080
                     crop:(0,0)/1920x1080]
                    -> "mxc_isi.7.capture":0 [ENABLED,IMMUTABLE]

    - entity 95: mxc_isi.7.capture (1 pad, 1 link)
                 type Node subtype V4L flags 0
                 device node name /dev/video7
            pad0: Sink
                    <- "mxc_isi.7":1 [ENABLED,IMMUTABLE]

    - entity 103: 4ac10000.syscon:formatter@20 (2 pads, 2 links, 1 route)
                  type V4L2 subdev subtype Unknown flags 0
                  device node name /dev/v4l-subdev9
            routes:
                    0/0 -> 1/0 [ACTIVE]
            pad0: Sink
                    [stream:0 fmt:UYVY8_1X16/1920x1080 field:none colorspace:smpte170m xfer:709 ycbcr:601 quantization:lim-range]
                    <- "csidev-4ad30000.csi":1 [ENABLED,IMMUTABLE]
            pad1: Source
                    [stream:0 fmt:UYVY8_1X16/1920x1080 field:none colorspace:smpte170m xfer:709 ycbcr:601 quantization:lim-range]
                    -> "crossbar":2 [ENABLED,IMMUTABLE]

    - entity 108: csidev-4ad30000.csi (2 pads, 2 links, 1 route)
                  type V4L2 subdev subtype Unknown flags 0
                  device node name /dev/v4l-subdev10
            routes:
                    0/0 -> 1/0 [ACTIVE]
            pad0: Sink
                    [stream:0 fmt:UYVY8_1X16/1920x1080 field:none colorspace:smpte170m xfer:709 ycbcr:601 quantization:lim-range]
                    <- "tevs 1-0048":0 []
            pad1: Source
                    [stream:0 fmt:UYVY8_1X16/1920x1080 field:none colorspace:smpte170m xfer:709 ycbcr:601 quantization:lim-range]
                    -> "4ac10000.syscon:formatter@20":0 [ENABLED,IMMUTABLE]

    - entity 113: tevs 1-0048 (1 pad, 1 link, 0 routes)
                  type V4L2 subdev subtype Sensor flags 0
                  device node name /dev/v4l-subdev11
            pad0: Source
                    [stream:0 fmt:UYVY8_1X16/640x480@1/60 field:none colorspace:srgb xfer:srgb ycbcr:601 quantization:full-range
                     crop.bounds:(0,0)/640x480
                     crop:(0,0)/640x480]
                    -> "csidev-4ad30000.csi":0 []

Showing the output as an image can make it easier to understand.

$ media-ctl --print-dot > graph.dot
$ dot -Tpng graph.dot > graph.png
# if you don't have tool, you need to install it as follows.
# sudo apt-get install -y graphviz.

We can observe that the link between ‘tevs 1-0048 ’ to ‘csidev-4ad30000 ’ is a dotted line. It’s means not available.

Need to enable the link between TEVS and CSI device.

$ media-ctl -l "'tevs 1-0048':0 -> 'csidev-4ad30000.csi':0 [1]"
For CSI 2 connector

When using CSI2, the TEVS camera is connected to I2C bus 3. You need to adjust the command accordingly, as shown below:

media-ctl -l "'tevs 3-0048':0 -> 'csidev-4ad40000.csi':0 [1]"

Sets the resolution and format of all media entities to match the camera's output. It means all components in the media pipeline have to align with the camera's output settings.

Use the v4l2-ctl command to view the camera's supported formats, resolutions, and frame intervals.

# formats
$ v4l2-ctl -d /dev/v4l-subdev11 --list-subdev-mbus-codes
  ioctl: VIDIOC_SUBDEV_ENUM_MBUS_CODE (pad=0)
          0x200f: MEDIA_BUS_FMT_UYVY8_1X16

# resolutions
$ v4l2-ctl -d /dev/v4l-subdev11 --list-subdev-framesize code=0x200f
  ioctl: VIDIOC_SUBDEV_ENUM_FRAME_SIZE (pad=0)
          Size Range: 640x480 - 640x480
          Size Range: 1280x720 - 1280x720
          Size Range: 1280x800 - 1280x800

# frame interval of resolution
$ v4l2-ctl -d /dev/v4l-subdev11 --list-subdev-frameintervals width=640,height=480,code=0x200f
  ioctl: VIDIOC_SUBDEV_ENUM_FRAME_INTERVAL (pad=0)
          Interval: 0.017s (60.000 fps)

$ v4l2-ctl -d /dev/v4l-subdev11 --list-subdev-frameintervals width=1280,height=720,code=0x200f
  ioctl: VIDIOC_SUBDEV_ENUM_FRAME_INTERVAL (pad=0)
          Interval: 0.017s (60.000 fps)

$ v4l2-ctl -d /dev/v4l-subdev11 --list-subdev-frameintervals width=1280,height=800,code=0x200f
  ioctl: VIDIOC_SUBDEV_ENUM_FRAME_INTERVAL (pad=0)
          Interval: 0.017s (60.000 fps)

Disable not used sources of crossbar, modify the route through the “crossbar” and only keep the channel of video0.

$ media-ctl -R "'crossbar' [2/0 -> 5/0 [1], 2/0 -> 6/0 [0], 2/0 -> 7/0 [0], 2/0 -> 8/0 [0], 2/0 -> 9/0 [0], 2/0 -> 10/0 [0], 2/0 -> 11/0 [0], 2/0 -> 12/0 [0]]"
For CSI 2 connector

The crossbar link to pad 3 when using CSI2, so the command need to change as below :

$ media-ctl -R "'crossbar' [3/0 -> 5/0 [1], 3/0 -> 6/0 [0], 3/0 -> 7/0 [0], 3/0 -> 8/0 [0], 3/0 -> 9/0 [0], 3/0 -> 10/0 [0], 3/0 -> 11/0 [0], 3/0 -> 12/0 [0]]"

Set resolution to 1280×720 for example.

$ media-ctl -V "'crossbar':2 [fmt:UYVY8_1X16/1280x720 field:none colorspace:srgb xfer:srgb ycbcr:601]"
$ media-ctl -V "'mxc_isi.0':0 [fmt:UYVY8_1X16/1280x720 field:none colorspace:srgb xfer:srgb ycbcr:601]"
$ media-ctl -V "'4ac10000.syscon:formatter@20':0 [fmt:UYVY8_1X16/1280x720 field:none colorspace:srgb xfer:srgb ycbcr:601]"
$ media-ctl -V "'csidev-4ad30000.csi':0 [fmt:UYVY8_1X16/1280x720 field:none colorspace:srgb xfer:srgb ycbcr:601]"
$ media-ctl -V "'tevs 1-0048':0 [fmt:UYVY8_1X16/1280x720 field:none colorspace:srgb xfer:srgb ycbcr:601]"
For CSI 2 connector
$ media-ctl -V "'crossbar':3 [fmt:UYVY8_1X16/1280x720 field:none colorspace:srgb xfer:srgb ycbcr:601]"
$ media-ctl -V "'mxc_isi.0':0 [fmt:UYVY8_1X16/1280x720 field:none colorspace:srgb xfer:srgb ycbcr:601]"
$ media-ctl -V "'4ac10000.syscon:formatter@120':0 [fmt:UYVY8_1X16/1280x720 field:none colorspace:srgb xfer:srgb ycbcr:601]"
$ media-ctl -V "'csidev-4ad40000.csi':0 [fmt:UYVY8_1X16/1280x720 field:none colorspace:srgb xfer:srgb ycbcr:601]"
$ media-ctl -V "'tevs 3-0048':0 [fmt:UYVY8_1X16/1280x720 field:none colorspace:srgb xfer:srgb ycbcr:601]"

🎥 Start Camera Video Stream via GStreamer​

Launch GStreamer Pipeline​

Specify the capture device you just get and start gstreamer to get video stream on screen.
Replace <res_w> and <res_h> with your selected resolution(1280x720) and screen dimensions:

$ gst-launch-1.0 v4l2src device=/dev/video0 ! \
  "video/x-raw, format=YUY2, width=<res_w>, height=<res_h>" ! \
  waylandsink sync=false

Check Media Controller​

We can get media controller as below :

    $ media-ctl -p
    Media controller API version 6.6.52

    Media device information
    ------------------------
    driver          mxc-isi
    model           FSL Capture Media Device
    serial
    bus info        platform:4ad50000.isi
    hw revision     0x0
    driver version  6.6.52

    Device topology
    - entity 1: crossbar (13 pads, 9 links, 8 routes)
                type V4L2 subdev subtype Unknown flags 0
                device node name /dev/v4l-subdev0
            routes:
                    2/0 -> 5/0 [ACTIVE]
                    2/0 -> 6/0 [INACTIVE]
                    2/0 -> 7/0 [INACTIVE]
                    2/0 -> 8/0 [INACTIVE]
                    2/0 -> 9/0 [INACTIVE]
                    2/0 -> 10/0 [INACTIVE]
                    2/0 -> 11/0 [INACTIVE]
                    2/0 -> 12/0 [INACTIVE]
            pad0: Sink
            pad1: Sink
            pad2: Sink
                    [stream:0 fmt:UYVY8_1X16/1280x720 field:none colorspace:srgb xfer:srgb ycbcr:601]
                    <- "4ac10000.syscon:formatter@20":1 [ENABLED,IMMUTABLE]
            pad3: Sink
            pad4: Sink
            pad5: Source
                    [stream:0 fmt:UYVY8_1X16/1280x720 field:none colorspace:srgb xfer:srgb ycbcr:601]
                    -> "mxc_isi.0":0 [ENABLED,IMMUTABLE]
            pad6: Source
                    -> "mxc_isi.1":0 [ENABLED,IMMUTABLE]
            pad7: Source
                    -> "mxc_isi.2":0 [ENABLED,IMMUTABLE]
            pad8: Source
                    -> "mxc_isi.3":0 [ENABLED,IMMUTABLE]
            pad9: Source
                    -> "mxc_isi.4":0 [ENABLED,IMMUTABLE]
            pad10: Source
                    -> "mxc_isi.5":0 [ENABLED,IMMUTABLE]
            pad11: Source
                    -> "mxc_isi.6":0 [ENABLED,IMMUTABLE]
            pad12: Source
                    -> "mxc_isi.7":0 [ENABLED,IMMUTABLE]

    - entity 15: mxc_isi.0 (2 pads, 2 links, 0 routes)
                 type V4L2 subdev subtype Unknown flags 0
                 device node name /dev/v4l-subdev1
            pad0: Sink
                    [stream:0 fmt:UYVY8_1X16/1280x720 field:none colorspace:srgb xfer:srgb ycbcr:601
                     compose.bounds:(0,0)/1280x720
                     compose:(0,0)/1280x720]
                    <- "crossbar":5 [ENABLED,IMMUTABLE]
            pad1: Source
                    [stream:0 fmt:YUV8_1X24/1280x720 field:none colorspace:jpeg xfer:srgb ycbcr:601 quantization:full-range
                     crop.bounds:(0,0)/1280x720
                     crop:(0,0)/1280x720]
                    -> "mxc_isi.0.capture":0 [ENABLED,IMMUTABLE]

    - entity 18: mxc_isi.0.capture (1 pad, 1 link)
                 type Node subtype V4L flags 0
                 device node name /dev/video0
            pad0: Sink
                    <- "mxc_isi.0":1 [ENABLED,IMMUTABLE]

    - entity 26: mxc_isi.1 (2 pads, 2 links, 0 routes)
                 type V4L2 subdev subtype Unknown flags 0
                 device node name /dev/v4l-subdev2
            pad0: Sink
                    [stream:0 fmt:UYVY8_1X16/1920x1080 field:none colorspace:jpeg xfer:srgb ycbcr:601 quantization:full-range
                     compose.bounds:(0,0)/1920x1080
                     compose:(0,0)/1920x1080]
                    <- "crossbar":6 [ENABLED,IMMUTABLE]
            pad1: Source
                    [stream:0 fmt:YUV8_1X24/1920x1080 field:none colorspace:jpeg xfer:srgb ycbcr:601 quantization:full-range
                     crop.bounds:(0,0)/1920x1080
                     crop:(0,0)/1920x1080]
                    -> "mxc_isi.1.capture":0 [ENABLED,IMMUTABLE]

    - entity 29: mxc_isi.1.capture (1 pad, 1 link)
                 type Node subtype V4L flags 0
                 device node name /dev/video1
            pad0: Sink
                    <- "mxc_isi.1":1 [ENABLED,IMMUTABLE]

    - entity 37: mxc_isi.2 (2 pads, 2 links, 0 routes)
                 type V4L2 subdev subtype Unknown flags 0
                 device node name /dev/v4l-subdev3
            pad0: Sink
                    [stream:0 fmt:UYVY8_1X16/1920x1080 field:none colorspace:jpeg xfer:srgb ycbcr:601 quantization:full-range
                     compose.bounds:(0,0)/1920x1080
                     compose:(0,0)/1920x1080]
                    <- "crossbar":7 [ENABLED,IMMUTABLE]
            pad1: Source
                    [stream:0 fmt:YUV8_1X24/1920x1080 field:none colorspace:jpeg xfer:srgb ycbcr:601 quantization:full-range
                     crop.bounds:(0,0)/1920x1080
                     crop:(0,0)/1920x1080]
                    -> "mxc_isi.2.capture":0 [ENABLED,IMMUTABLE]

    - entity 40: mxc_isi.2.capture (1 pad, 1 link)
                 type Node subtype V4L flags 0
                 device node name /dev/video2
            pad0: Sink
                    <- "mxc_isi.2":1 [ENABLED,IMMUTABLE]

    - entity 48: mxc_isi.3 (2 pads, 2 links, 0 routes)
                 type V4L2 subdev subtype Unknown flags 0
                 device node name /dev/v4l-subdev4
            pad0: Sink
                    [stream:0 fmt:UYVY8_1X16/1920x1080 field:none colorspace:jpeg xfer:srgb ycbcr:601 quantization:full-range
                     compose.bounds:(0,0)/1920x1080
                     compose:(0,0)/1920x1080]
                    <- "crossbar":8 [ENABLED,IMMUTABLE]
            pad1: Source
                    [stream:0 fmt:YUV8_1X24/1920x1080 field:none colorspace:jpeg xfer:srgb ycbcr:601 quantization:full-range
                     crop.bounds:(0,0)/1920x1080
                     crop:(0,0)/1920x1080]
                    -> "mxc_isi.3.capture":0 [ENABLED,IMMUTABLE]

    - entity 51: mxc_isi.3.capture (1 pad, 1 link)
                 type Node subtype V4L flags 0
                 device node name /dev/video3
            pad0: Sink
                    <- "mxc_isi.3":1 [ENABLED,IMMUTABLE]

    - entity 59: mxc_isi.4 (2 pads, 2 links, 0 routes)
                 type V4L2 subdev subtype Unknown flags 0
                 device node name /dev/v4l-subdev5
            pad0: Sink
                    [stream:0 fmt:UYVY8_1X16/1920x1080 field:none colorspace:jpeg xfer:srgb ycbcr:601 quantization:full-range
                     compose.bounds:(0,0)/1920x1080
                     compose:(0,0)/1920x1080]
                    <- "crossbar":9 [ENABLED,IMMUTABLE]
            pad1: Source
                    [stream:0 fmt:YUV8_1X24/1920x1080 field:none colorspace:jpeg xfer:srgb ycbcr:601 quantization:full-range
                     crop.bounds:(0,0)/1920x1080
                     crop:(0,0)/1920x1080]
                    -> "mxc_isi.4.capture":0 [ENABLED,IMMUTABLE]

    - entity 62: mxc_isi.4.capture (1 pad, 1 link)
                 type Node subtype V4L flags 0
                 device node name /dev/video4
            pad0: Sink
                    <- "mxc_isi.4":1 [ENABLED,IMMUTABLE]

    - entity 70: mxc_isi.5 (2 pads, 2 links, 0 routes)
                 type V4L2 subdev subtype Unknown flags 0
                 device node name /dev/v4l-subdev6
            pad0: Sink
                    [stream:0 fmt:UYVY8_1X16/1920x1080 field:none colorspace:jpeg xfer:srgb ycbcr:601 quantization:full-range
                     compose.bounds:(0,0)/1920x1080
                     compose:(0,0)/1920x1080]
                    <- "crossbar":10 [ENABLED,IMMUTABLE]
            pad1: Source
                    [stream:0 fmt:YUV8_1X24/1920x1080 field:none colorspace:jpeg xfer:srgb ycbcr:601 quantization:full-range
                     crop.bounds:(0,0)/1920x1080
                     crop:(0,0)/1920x1080]
                    -> "mxc_isi.5.capture":0 [ENABLED,IMMUTABLE]

    - entity 73: mxc_isi.5.capture (1 pad, 1 link)
                 type Node subtype V4L flags 0
                 device node name /dev/video5
            pad0: Sink
                    <- "mxc_isi.5":1 [ENABLED,IMMUTABLE]

    - entity 81: mxc_isi.6 (2 pads, 2 links, 0 routes)
                 type V4L2 subdev subtype Unknown flags 0
                 device node name /dev/v4l-subdev7
            pad0: Sink
                    [stream:0 fmt:UYVY8_1X16/1920x1080 field:none colorspace:jpeg xfer:srgb ycbcr:601 quantization:full-range
                     compose.bounds:(0,0)/1920x1080
                     compose:(0,0)/1920x1080]
                    <- "crossbar":11 [ENABLED,IMMUTABLE]
            pad1: Source
                    [stream:0 fmt:YUV8_1X24/1920x1080 field:none colorspace:jpeg xfer:srgb ycbcr:601 quantization:full-range
                     crop.bounds:(0,0)/1920x1080
                     crop:(0,0)/1920x1080]
                    -> "mxc_isi.6.capture":0 [ENABLED,IMMUTABLE]

    - entity 84: mxc_isi.6.capture (1 pad, 1 link)
                 type Node subtype V4L flags 0
                 device node name /dev/video6
            pad0: Sink
                    <- "mxc_isi.6":1 [ENABLED,IMMUTABLE]

    - entity 92: mxc_isi.7 (2 pads, 2 links, 0 routes)
                 type V4L2 subdev subtype Unknown flags 0
                 device node name /dev/v4l-subdev8
            pad0: Sink
                    [stream:0 fmt:UYVY8_1X16/1920x1080 field:none colorspace:jpeg xfer:srgb ycbcr:601 quantization:full-range
                     compose.bounds:(0,0)/1920x1080
                     compose:(0,0)/1920x1080]
                    <- "crossbar":12 [ENABLED,IMMUTABLE]
            pad1: Source
                    [stream:0 fmt:YUV8_1X24/1920x1080 field:none colorspace:jpeg xfer:srgb ycbcr:601 quantization:full-range
                     crop.bounds:(0,0)/1920x1080
                     crop:(0,0)/1920x1080]
                    -> "mxc_isi.7.capture":0 [ENABLED,IMMUTABLE]

    - entity 95: mxc_isi.7.capture (1 pad, 1 link)
                 type Node subtype V4L flags 0
                 device node name /dev/video7
            pad0: Sink
                    <- "mxc_isi.7":1 [ENABLED,IMMUTABLE]

    - entity 103: 4ac10000.syscon:formatter@20 (2 pads, 2 links, 1 route)
                  type V4L2 subdev subtype Unknown flags 0
                  device node name /dev/v4l-subdev9
            routes:
                    0/0 -> 1/0 [ACTIVE]
            pad0: Sink
                    [stream:0 fmt:UYVY8_1X16/1280x720 field:none colorspace:srgb xfer:srgb ycbcr:601]
                    <- "csidev-4ad30000.csi":1 [ENABLED,IMMUTABLE]
            pad1: Source
                    [stream:0 fmt:UYVY8_1X16/1280x720 field:none colorspace:srgb xfer:srgb ycbcr:601]
                    -> "crossbar":2 [ENABLED,IMMUTABLE]

    - entity 108: csidev-4ad30000.csi (2 pads, 2 links, 1 route)
                  type V4L2 subdev subtype Unknown flags 0
                  device node name /dev/v4l-subdev10
            routes:
                    0/0 -> 1/0 [ACTIVE]
            pad0: Sink
                    [stream:0 fmt:UYVY8_1X16/1280x720 field:none colorspace:srgb xfer:srgb ycbcr:601]
                    <- "tevs 1-0048":0 [ENABLED]
            pad1: Source
                    [stream:0 fmt:UYVY8_1X16/1280x720 field:none colorspace:srgb xfer:srgb ycbcr:601]
                    -> "4ac10000.syscon:formatter@20":0 [ENABLED,IMMUTABLE]

    - entity 113: tevs 1-0048 (1 pad, 1 link, 0 routes)
                  type V4L2 subdev subtype Sensor flags 0
                  device node name /dev/v4l-subdev11
            pad0: Source
                    [stream:0 fmt:UYVY8_1X16/1280x720@1/60 field:none colorspace:srgb xfer:srgb ycbcr:601 quantization:full-range
                     crop.bounds:(0,0)/1280x720
                     crop:(0,0)/1280x720]
                    -> "csidev-4ad30000.csi":0 [ENABLED]

🚨 Troubleshooting​

Check DTB Overlay in U-Boot​

Make sure the correct Device Tree Blob (DTB) is specified in U-Boot.

  u-boot=> printenv fdtfile
  u-boot=> fdtfile=imx95-edm-evm-tevs.dtb

Verify Camera Initialization​

Use dmesg to check if the TEVS camera module was initialized correctly.

  $ dmesg -t | grep tevs
    platform 4ad30000.csi: Fixed dependency cycle(s) with /soc/bus@44000000/i2c@44350000/tevs@48
    tevs 1-0048: tevs_probe() device node: tevs@48
    tevs 1-0048: Version:24.9.0.1
    tevs 1-0048: Product:TEVS-AR0144, HeaderVer:3, MIPI_Rate:800
    tevs 1-0048: probe success

Confirm Board and Camera DTB​

Check if the correct DTB is loaded with a matching camera model.

  $ dmesg -t | grep -i model
    Machine model: TechNexion EDM-IMX95 and EVM baseboard with TechNexion TEVS camera
    mali 4d900000.gpu: Using configured power model mali-tvax-power-model, and fallback mali-simple-power-model

Check Available Video Devices​

Verify that the video devices are available.

  $ v4l2-ctl --list-device

Example output:

mxc-isi-cap (platform:4ad50000.isi):
    /dev/video0
    /dev/video1
    /dev/video2
    /dev/video3
    /dev/video4
    /dev/video5
    /dev/video6
    /dev/video7
    /dev/media0

mxc-jpeg codec (platform:4c500000.jpegdec):
    /dev/video10

mxc-jpeg codec (platform:4c550000.jpegenc):
    /dev/video11

wave6-dec (platform:wave6-dec):
    /dev/video8

wave6-enc (platform:wave6-enc):
    /dev/video9

Typically, /dev/video0 is your primary camera capture device when using CSI1.