How We Designed the Librem 5 Dev Kit with 100% Free Software
https://puri.sm/posts/how-we-designed-the-librem-5-dev-kit-with-100-free-software/
(An early glimpse on the) #librem5 's devkit graphics on Linux 5.x : https://source.puri.sm/guido.gunther/linux-imx8/tree/imx8-5.x-drm
Hardware Engineer