[S905X3] How to correctly compile own DTS

**chewitt** · October 30, 2025 at 9:37 PM

Have a look here: https://github.com/jefflessard/tm…eedback/devices

If you know the VFD config that worked on CE there should be a matching dtso file. Amlogic u-boot doesn't support overlays so you cannot load/use the dtso overlays directly, but you should be able to look at the content there and see how I've implemented the same changes in board dts files in my kernel branch.

The device-tree content for tm16xx has changed format a bit due to kernel maintainer feedback so the dts files in my 6.17 repo will work with the driver in LE13/master but not the driver in the LE12.2 image.

Benik3 · November 10, 2025 at 7:56 PM

Yes, I tried to add this definition: https://github.com/jefflessard/tm…-max-1gbit.dtso
Same old vfd config works fine on CoreElec (for sure tested with CE fresh install).

But nothing. I don't see any error in dmesg, display service is also running fine:

Code

Loaded: loaded (/usr/lib/systemd/system/display.service; disabled; preset: disabled)
    Active: active (running) since Mon 2025-11-10 19:42:36 UTC; 2min 34s ago
Invocation: d2c453e037584c67a01431b7fc534bc6
  Main PID: 986 (display-service)
     Tasks: 3 (limit: 863)
    Memory: 1.5M (peak: 2.3M)
       CPU: 135ms
    CGroup: /system.slice/display.service
            ├─ 986 /bin/sh /usr/sbin/display-service
            ├─ 996 /bin/sh /usr/sbin/display-service
            └─1201 sleep 60
Nov 10 19:42:36 LibreELEC systemd[1]: Started display.service.
Nov 10 19:42:37 LibreELEC display-service[986]: [INFO] USB LED trigger set to 'usbport'
Nov 10 19:42:37 LibreELEC display-service[986]: [INFO] LAN LED not found
Nov 10 19:42:37 LibreELEC display-service[986]: [INFO] WiFi LED not found
Nov 10 19:42:37 LibreELEC display-service[986]: [INFO] Bluetooth LED not found
Nov 10 19:42:37 LibreELEC display-service[986]: [INFO] SD Card LED trigger set to 'mmc0'
Nov 10 19:42:37 LibreELEC display-service[986]: [INFO] Starting TM16xx display-service in daemon mode
Nov 10 19:42:37 LibreELEC display-service[986]: [INFO] Time Colon LED trigger set to 'timer'
Nov 10 19:42:37 LibreELEC display-service[986]: [INFO] Time display started with PID 996

Display More

Any idea what I can check to help you?

Code

LibreELEC:~ # ls -al /sys/class/leds
total 0
drwxr-xr-x    2 root     root             0 Oct 13 15:01 .
drwxr-xr-x   61 root     root             0 Jan  1  1970 ..
lrwxrwxrwx    1 root     root             0 Oct 13 15:01 display -> ../../devices/platform/spi/spi_master/spi0/spi0.0/leds/display
lrwxrwxrwx    1 root     root             0 Oct 13 15:01 display::apps -> ../../devices/platform/spi/spi_master/spi0/spi0.0/leds/display::apps
lrwxrwxrwx    1 root     root             0 Oct 13 15:01 display::colon -> ../../devices/platform/spi/spi_master/spi0/spi0.0/leds/display::colon
lrwxrwxrwx    1 root     root             0 Oct 13 15:01 display::hdmi -> ../../devices/platform/spi/spi_master/spi0/spi0.0/leds/display::hdmi
lrwxrwxrwx    1 root     root             0 Oct 13 15:01 display::sd -> ../../devices/platform/spi/spi_master/spi0/spi0.0/leds/display::sd
lrwxrwxrwx    1 root     root             0 Oct 13 15:01 display::setup -> ../../devices/platform/spi/spi_master/spi0/spi0.0/leds/display::setup
lrwxrwxrwx    1 root     root             0 Oct 13 15:01 display::usb -> ../../devices/platform/spi/spi_master/spi0/spi0.0/leds/display::usb
lrwxrwxrwx    1 root     root             0 Oct 13 15:01 display::video -> ../../devices/platform/spi/spi_master/spi0/spi0.0/leds/display::video
lrwxrwxrwx    1 root     root             0 Oct 13 15:01 input0::capslock -> ../../devices/platform/soc/ffe09000.usb/ff500000.usb/xhci-hcd.2.auto/usb1/1-2/1-2.4/1-2.4:1.0/0003:045E:07B2.0001/input/input0/input0::capslock
lrwxrwxrwx    1 root     root             0 Oct 13 15:01 input0::numlock -> ../../devices/platform/soc/ffe09000.usb/ff500000.usb/xhci-hcd.2.auto/usb1/1-2/1-2.4/1-2.4:1.0/0003:045E:07B2.0001/input/input0/input0::numlock
lrwxrwxrwx    1 root     root             0 Oct 13 15:01 input0::scrolllock -> ../../devices/platform/soc/ffe09000.usb/ff500000.usb/xhci-hcd.2.auto/usb1/1-2/1-2.4/1-2.4:1.0/0003:045E:07B2.0001/input/input0/input0::scrolllock

Display More

display-service -c also doesn't light up any LED.

**chewitt** · November 12, 2025 at 11:56 AM

Quote from Benik3

Any idea what I can check to help you?

Push the uncompiled device-tree (dts) file that includes your modifications to a GitHub repo so I can see them. NB: You won't get any meaningful feedback from the systemd service because the setup script is blindly dependent on the compiled dtb. The content in the dtb file is either right and it works, or wrong and it doesn't.

Benik3 · November 12, 2025 at 8:01 PM

I added it as patch to the forked repo: https://github.com/Benik3/LibreEL…-plus2-ai.patch

And attaching the dts itself.

[S905X3] How to correctly compile own DTS

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