linux-kernel - Re: [RFC v3 14/33] rust: drm/kms: Add OpaqueConnector and OpaqueConnectorState

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Message-ID: <20250314-quaint-acoustic-rook-c925b0@houat>
Date: Fri, 14 Mar 2025 13:08:08 +0100
From: Maxime Ripard <mripard@...nel.org>
To: Lyude Paul <lyude@...hat.com>
Cc: dri-devel@...ts.freedesktop.org, rust-for-linux@...r.kernel.org, 
	Danilo Krummrich <dakr@...nel.org>, mcanal@...lia.com, Alice Ryhl <aliceryhl@...gle.com>, 
	Simona Vetter <sima@...ll.ch>, Daniel Almeida <daniel.almeida@...labora.com>, 
	Miguel Ojeda <ojeda@...nel.org>, Alex Gaynor <alex.gaynor@...il.com>, 
	Boqun Feng <boqun.feng@...il.com>, Gary Guo <gary@...yguo.net>, 
	Björn Roy Baron <bjorn3_gh@...tonmail.com>, Benno Lossin <benno.lossin@...ton.me>, 
	Andreas Hindborg <a.hindborg@...nel.org>, Trevor Gross <tmgross@...ch.edu>, 
	open list <linux-kernel@...r.kernel.org>
Subject: Re: [RFC v3 14/33] rust: drm/kms: Add OpaqueConnector and
 OpaqueConnectorState

Hi,

On Wed, Mar 05, 2025 at 05:59:30PM -0500, Lyude Paul wrote:
> Since we allow drivers to have multiple implementations of DriverConnector
> and DriverConnectorState (in C, the equivalent of this is having multiple
> structs which embed drm_connector) - there are some situations we will run
> into where it's not possible for us to know the corresponding
> DriverConnector or DriverConnectorState for a given connector. The most
> obvious one is iterating through all connectors on a KMS device.

It's probabyl a bit of a stupid question again, but why can't we just
iterate over dyn Connector / ConnectorState and need an intermediate
structure?

Maxime

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