How to force mesa to use lima drivers instead of llvmpipe (on Odroid U3 exynos4412) ?

Similar to gitlab.freedesktop.org/lima/mesa/issues/107.

I am testing lima drivers on Odroid U3 with ubuntu 18.04 (X server 1.19.6) with kernel 5.3.0-rc3 with lima y exynos-drm drivers enabled.

I have built and installed mesa-19.1.5 following https://gitlab.freedesktop.org/lima/web.

But es2_info keeps indicating: GL_RENDERER: llvmpipe

I have also built https://gitlab.freedesktop.org/mesa/kmscube , but the output is:

no drm device found!
could not open drm device
failed to initialize legacy DRM

What step may be missing or what is the problem?