Help wanted to test a new OpenVFD alternative

[Jean-Francois Lessard]

Hi @KrzyPacu

 

I can only provide basic instructions without any support regarding loading overlays. It's not supported on every device (and I personally don't own a device which supports this). You can always search for other posts on device tree overlay for your device if you absolutely want to use overlays.

 

Though, you can easily embed the device tree overlay into your dtb instead. This is what I do personally.

 

You can check instructions of Option 2: Create an updated dtb at : https://github.com/jefflessard/tm16xx-display/blob/main/README.md#configure-the-device-tree

[KrzyPacu]

$ make meson-sm1-x96-air-gbit_mod.dtb ORIGINAL_DTB=meson-sm1-x96-air-gbit.dtb
make: *** No rules for object execution 'meson-sm1-x96-air-gbit_mod.dtb'. Stop.

https://github.com/jefflessard/tm16xx-display/blob/main/README.md#configure-the-device-tree

I can't do option 1 because I don't have the "/boot/armbianEnv.txt" file .

Where do I add the entry "user_overlays=tm16xx"

Edited 11 hours ago by KrzyPacu

[Jean-Francois Lessard]

@KrzyPacu

Start by copying your original dtb into tm16xx-display folder:

 

cd tm16xx-display

cp meson-sm1-x96-air-gbit.dtb original.dtb

# or alternatively run: make extract-dtb

 

Then, assuming the corresponding device tree source overlay in the "devices" subfolder is "x96-max-1gbit.dtso", build the updated dtb:

 

make x96-max-1gbit.dtb # <-- same name as the dtso file in devices subfolder but with dtb extension

 

Finally, replace the original dtb of your boot path with the updated one (first keep a copy of your original dtb somewhere else, just in case) and reboot:

 

cp release/x96-max-1gbit.dtb /boot/dtb/{YOUR_DTB_PATH}.dtb

reboot

 

[KrzyPacu]

 

J

 

Edited 8 hours ago by KrzyPacu

[SteeMan]

@KrzyPacu  The Amlogic TV Box builds use extlinux.conf.  So you should add your overlay info in that file (/boot/extlinux/extlinux.conf).

I believe the syntax for extlinux is:

OVERLAYS /dtb/amlogic/overlay/...

(I'd recommend placing it just below the FDT line)

(Note: I've never tried to load an overlay through extlinux, but have been intending to try it some day.  Let us know how it goes)

[KrzyPacu]

I managed to build "meson-sm1-x96-air-gbit.dtb" using the method described by @Jean-Francois Lessard but I haven't added anything to the "extlinux.conf" file yet.

Then I issued the command "$ make module" and it seems to me that the compilation went correctly.

Then I did "$ sudo make module-install" and here are the errors:

 

$ sudo make module-install
make -C /lib/modules/6.12.33-current-meson64/build M= modules_install INSTALL_MOD_PATH=/
make[1]: Enter the directory '/usr/src/linux-headers-6.12.33-current-meson64'
  SYMLINK //lib/modules/6.12.33/build
make[3]: *** No rules to make an object 'modules.order', required by '//lib/modules/6.12.33/modules.order'. Stop.
make[2]: *** [/usr/src/linux-headers-6.12.33-current-meson64/Makefile:1853: modules_install] Error 2
make[1]: *** [Makefile:224: __sub-make] Error 2
make[1]: Leaving the directory '/usr/src/linux-headers-6.12.33-current-meson64'
make: *** [Makefile:35: module-install] Error 2

 

[Jean-Francois Lessard]

@KrzyPacu it seems there is an issue with your kernel source code (or minimal headers).

 

Ensure to install kernel headers for your distribution/version first 

 

If it still doesn't point to your headers/source path, you can pass it as a variable when executing make. Something like:

 

sudo make module-install KDIR=/path/to/your/headers/build