topic Re: Galcore does not create a device in i.MX Processors

Galcore does not create a device

MicMoba — Mon, 16 Sep 2024 15:58:14 GMT

Hi,

I need some support around the GPU topic of the iMX8MP.

After I switched from Kernel 5.15.52 to Kernel 6.6.23 my LVDS display did not work as expect.

I recognized that the galcore kernel module did not create a device (/dev/galcore).

How can I found out why the device is not create? I tried to remove the module and insert again but this works without error messages. I searched in dmesg and journalctl but also with no success.

So what possibilities do I have to get more information?

Re: Galcore does not create a device

Bio_TICFSL — Tue, 17 Sep 2024 14:17:38 GMT

Hello,

Send us you dmesg log file is not possible not building the galcore in 6.6.23.

regards

Re: Galcore does not create a device

MicMoba — Tue, 17 Sep 2024 15:49:41 GMT

Hi,

you will find the dmesg output in the attachment

Re: Galcore does not create a device

MicMoba — Wed, 18 Sep 2024 13:19:35 GMT

Can you tell me how the procedure with the vivante galcore firmare is?

The firmware is a binary blob. The kernel module loads the firmware and initialize the GPU. Is the firmware part of the kernel module (galcore.ko) or should there a .bin file in the /lib/firmware folder which is load?

Re: Galcore does not create a device

mgordon — Wed, 18 Sep 2024 21:10:30 GMT

I'm seeing the same issue with 5.4. galcore driver is loaded, but no /dev/galcore device. Nothing in either dmesg or journalctl. Any suggestions?

Re: Galcore does not create a device

MicMoba — Thu, 19 Sep 2024 09:51:45 GMT

I checked the following things:

$ strings /usr/lib/libGAL.so | grep VERSION $VERSION$6.4.11:745085:bc7b6a2a0f$ $ strings /usr/lib/modules/6.6.23-v6.6.23-2.0.0-phy-ge2011246/updates/galcore.ko | grep VERSION $VERSION$6.4.11:745085$ $ldconfig -p | grep libGAL.so libGAL.so (libc6,AArch64) => /lib/libGAL.so

So the Galcore firmware (libGAL.so) and the kernel module (galcore.ko) have the same version. I can see the galcore with lsmod command.

I have a /dev/dri/card0 device but no /dev/galcore device

Which possibilities do I have to do further checks? How is the connection between LVDS and Galcore?

Re: Galcore does not create a device

Bio_TICFSL — Thu, 19 Sep 2024 13:38:41 GMT

Hello,

You have galcore in your system and it's ready to use, you just need to send the graphics to lvds, make sure your display is lvds in uboot.

Regards

Re: Galcore does not create a device

MicMoba — Thu, 19 Sep 2024 13:54:23 GMT

That's a point I will check.

You mean it is not necessary to have a device called /dev/galcore ? I thought this is mantandory for a iMX8 system with Vivante GPU.

This is a part of weston 12 output:

[12:26:48.568] libseat: session control granted [12:26:48.571] using /dev/dri/card0 [12:26:48.571] DRM: supports atomic modesetting [12:26:48.571] DRM: does not support GBM modifiers [12:26:48.571] DRM: does not support async page flipping [12:26:48.571] DRM: supports picture aspect ratio [12:26:48.571] Loading module '/usr/lib/libweston-12/gl-renderer.so' [ 1] Failed to open device: No such file or directory, Try again... [ 2] Failed to open device: No such file or directory, Try again... [ 3] Failed to open device: No such file or directory, Try again... [ 4] Failed to open device: No such file or directory, Try again... [ 5] _OpenDevice(1031): FATAL: Failed to open device, errno=No such file or directory. [ 6] Failed to open device: No such file or directory, Try again... [ 7] Failed to open device: No such file or directory, Try again... [ 8] Failed to open device: No such file or directory, Try again... [ 9] Failed to open device: No such file or directory, Try again... [ 10] _OpenDevice(1031): FATAL: Failed to open device, errno=No such file or directory. [12:26:56.585] [seatd/client.c:471] Client disconnected

I thought the "Failed to open device" messages were from a missing /dev/galcore device. How can I get more information about the missing file or directory?

Re: Galcore does not create a device

MicMoba — Fri, 20 Sep 2024 07:11:28 GMT

Hi I found out that I miss to enable the mix_gpu_ml node in the devicetree.

After I add the lines

&mix_gpu_ml { status = "okay"; };

and reboot I have a /dev/galcore device. And now I am also able to start weston