On Fri, 2021-04-23 at 14:39 +0200, Thierry Reding wrote: > > I'm curious: how is a DP AUX adapter reference count going to solve the > issue of potentially registering devices too early (i.e. before the DRM > is registered)? > > Is it because registering too early could cause a reference count > problem if somebody get a hold of the DP AUX adapter before the parent > DRM device is around? Well currently the problem is that we kind of want to avoid setting up the i2c adapter before the DRM driver is registered with userspace, but it's not really possible to do that if we need the core device struct for the ddc adapter initialized so that tegra can call get_device() on it in drivers/gpu/drm/tegra/sor.c. So my thought is instead of calling get_device() on the ddc adapter that the AUX channel provides, why not just call it on the actual platform device that implements the AUX channel instead? I think this should work pretty nicely while still preventing the platform device for the AUX channel from disappearing before the SOR has disappeared. > > Thierry -- Cheers, Lyude Paul (she/her) Software Engineer at Red Hat _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/dri-devel
