Re: [PATCH 0/6] rust: drm: Higher-Ranked Lifetime private data

[Boris Brezillon]

On Thu, 14 May 2026 21:07:11 +0200
"Danilo Krummrich" <dakr@xxxxxxxxxx> wrote:

> On Thu May 14, 2026 at 8:59 PM CEST, Deborah Brouwer wrote:
> > let unreg_dev = drm::UnregisteredDevice::<TyrDrmDriver>::new(pdev, data)?;  
> 
> You shouldn't need this anymore as the drm::Registration itself has private data
> now that is bound to the lifetime of the underlying bus device, which should be
> the correct lifetime for juggling the GPU page tables.

The problem we have is that, to initialize some of the sub-components
of the driver, we need to be able to allocate GEM objects before the DRM
device is exposed (registered), and because the data we want to attach
to the final registration contains these sub-components, we need to
defer the data assignment to the registration step (which was allowed
by [1], but apparently this was dropped from the latest version of
the series for some reason).

[1]https://lore.kernel.org/dri-devel/20260320233645.950190-4-lyude@xxxxxxxxxx/