Hi Daniel, Liviu,
Having just inadvertently merged -next into my working branch, I find dev6d910bfa809e ("drm/hlcd: Use lockless gem BO free callback") adversely affecting my board's ability to boot ;)
Since I (intentionally) don't have sufficient CMA to create a framebuffer, drm_gem_cma_create() fails, unconditionally calls the now-NULL drm->driver->gem_free_object() in its cleanup path, and fiery death ensues...
Regards, Robin.