i.MX GraphicsのトピックRe: Linux Displaymanager to use onchip GPGPU

Linux Displaymanager to use onchip GPGPU

kiashade — Mon, 11 Mar 2024 22:10:58 GMT

Greetings,

concerns i.MX as well as S32V2 processors.

We are using NXP's yocto based Ubuntu images.

We can not figure out how to configure lightdm/gdm to use SOC's onchip GPGPU for desktop rendering.

Display is plugged into EVB and u-boot, console and X are visible nicely.

However, display response is sluggish even at low res and HTOP shows discernible CPU load if images/windows are being dragged and pulled across desktop, indicating CPU based rendering.

This might be less of a SOC-specific issue, and more of a generic thing, how to chose which GL device to render desktop on.

Thanks !

Re: Linux Displaymanager to use onchip GPGPU

Bio_TICFSL — Tue, 12 Mar 2024 15:41:09 GMT

Hello,

I think there is no LightDM in wayland, https://wiki.archlinux.org/title/wayland#Display_managers

Regards

Re: Linux Displaymanager to use onchip GPGPU

kiashade — Tue, 12 Mar 2024 18:42:46 GMT

Greetings,

thanks for swift reply. Much appreciated ! Very useful link !

We were shooting for gdm anyway, to be more future proof.

Issue is that we cant find proper instructions as how to tie together GPGPU driver (e.g. Vivante in case of S32V2) and the display manager (GDM in this case).

Would this have to happen through Wayland (which more or less sits between them) ?

Unfortunately, there isnt a yocto recipe for that for us to analyze.

Thanks !