[WIP RFC v2 05/35] rust: drm/kms: Add bindings for drm_connector

[Lyude Paul]

On Wed, 2024-12-11 at 09:43 +0100, Simona Vetter wrote:
> On Tue, Dec 10, 2024 at 06:41:52PM -0500, Lyude Paul wrote:
> > On Tue, 2024-11-26 at 18:25 -0300, Daniel Almeida wrote:
> > > Hi Lyude,
> > > 
> > > > On 30 Sep 2024, at 20:09, Lyude Paul <lyude at redhat.com> wrote:
> > > > 
> > > > +
> > > > +impl<T: DriverConnector> Connector<T> {
> > > > +    /// Construct a new [`Connector`].
> > > > +    ///
> > > > +    /// A driver may use this to create new [`Connector`] objects.
> > > > +    ///
> > > > +    /// TODO: Add a way to handle creating connectors after device registration. Also, that's why we
> > > > +    /// don't ask for a UnregisteredKms device here.
> > > 
> > > Can you elaborate? We can try to help if you describe this a bit better :)
> > 
> > oh - totally forgot to respond to this!
> > 
> > So: out of all of the mode objects, Connectors are a bit special. They can
> > actually be created and destroyed after registration (hence why they have a
> > refcount). This is not terribly difficult to handle before registration, the
> > complication comes after registration - where we'll likely need to split
> > Connector into two different types:
> > 
> > UnregisteredConnector
> > 
> > Connector
> > 
> > Where you have to sacrifice the UnregisteredConnector to get to the Connector
> > object. I don't think this will actually be too difficult to implement, I just
> > didn't get around to it yet because there were so many other open questions I
> > had about the design here in general.
> 
> For connnnector lifetime fun please also see Imre's patches for fixing
> some races around mst hotplug. At least on the C side I think we will
> split connectors into dynamic and static ones, to be able to handle things
> correctly. It's a bit a mess unfortuantely.

Thanks for letting me know! Honestly I think this actually should make things
easier to handle in rust, since I can just push off dynamic connectors for the
time being and simplify things a bit.

> -Sima

-- 
Cheers,
 Lyude Paul (she/her)
 Software Engineer at Red Hat

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