Am Mittwoch, 19. Januar 2022, 14:40:27 CET schrieb Lucas Stach: > Add the DT nodes for both the 3D and 2D GPU cores found on the i.MX8MP. > > etnaviv-gpu 38000000.gpu: model: GC7000, revision: 6204 > etnaviv-gpu 38008000.gpu: model: GC520, revision: 5341 > [drm] Initialized etnaviv 1.3.0 20151214 for etnaviv on minor 0 Unfortunately it does not work when CONFIG_DRM_ETNAVIV=m etnaviv-gpu 38000000.gpu: model: GC0, revision: 0 etnaviv-gpu 38000000.gpu: Unknown GPU model etnaviv-gpu 38008000.gpu: model: GC0, revision: 0 etnaviv-gpu 38008000.gpu: Unknown GPU model When I use CONFIG_DRM_ETNAVIV=y, I get the same log message as you. It's not related to this patch, but I have no clue if the cause is in blk-ctrl or pgc. I think (don't know for sure yet) my random errors on USB side are gone when USB drivers (PHY as well) are built-in. But I might be wrong here. Best regards, Alexander