187.23.176.244: Migrated comment #6066

2025-10-25T23:38:41Z

Migrated comment #6066

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A suggestion to create static symlinks to the correct devices on boot, using udev rules. This way you can hardcode them in software without having to run detection logic everytime:

Create file /etc/udev/rules.d/80-video.rules with the below contents and reboot. Then you should be able to access the correct media device using /dev/media-rp1-cfe, the TC358743 subdev using /dev/v4l-subdev-tc358743 and the video device using /dev/video-rp1-cfe-csi2_ch0:

/etc/udev/rules.d/80-video.rules:

# Create fixed & identifiable symlinks for the Geekworm X1301 HDMI to CSI-2
# bridge interface. In this case, we want:
# 1. The media node corresponding to the raspi5 Camera Front End
# 2. The subdev node corresponding to the tc358743 chip (HDMI-to-CSI-2 bridge)
# 3. The first CSI (camera serial interface) capture device node of the raspi5
# (rp1-cfe-csi2_ch0)
SUBSYSTEM=="media", KERNEL=="media*", ATTR{model}=="rp1-cfe", KERNELS=="1f00128000.csi", DRIVERS=="rp1-cfe", SYMLINK+="media-rp1-cfe"
SUBSYSTEM=="video4linux", KERNEL=="v4l-subdev*", ATTR{name}=="tc358743 11-000f", KERNELS=="11-000f", SUBSYSTEMS=="i2c" DRIVERS=="tc358743", SYMLINK+="v4l-subdev-tc358743"
SUBSYSTEM=="video4linux", KERNEL=="video*", ATTR{name}=="rp1-cfe-csi2_ch0", KERNELS=="1f00128000.csi", DRIVERS=="rp1-cfe", SYMLINK+="video-rp1-cfe-csi2_ch0"```

CommentStreams:7e42d17b1eb544235d501a554ffb5f60 - Revision history

187.23.176.244: Migrated comment #6066