37.120.217.10: Migrated comment #6067

2025-10-26T00:33:35Z

Migrated comment #6067

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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. 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:75ab77ac4483a1b3f286cbb6aa6e825c - Revision history

37.120.217.10: Migrated comment #6067