From a5fb73a8ab4fe9cc0ffc31e8c43bd2636f9c5427 Mon Sep 17 00:00:00 2001
From: Lyude Paul <lyude@redhat.com>
Date: Thu, 23 May 2024 16:50:22 -0400
Subject: [PATCH] rust: drm/kms: Add RawPlaneState::crtc()
Add a binding for checking drm_plane_state.crtc. Note that we don't have a
way of knowing what DriverCrtc implementation would be used here (and want
to make this function also available on OpaquePlaneState types), so we
return an OpaqueCrtc.
Signed-off-by: Lyude Paul <lyude@redhat.com>
---
rust/kernel/drm/kms/plane.rs | 11 +++++++++++
1 file changed, 11 insertions(+)
diff --git a/rust/kernel/drm/kms/plane.rs b/rust/kernel/drm/kms/plane.rs
index 66d11754c203e..4d542963da881 100644
--- a/rust/kernel/drm/kms/plane.rs
+++ b/rust/kernel/drm/kms/plane.rs
@@ -30,6 +30,7 @@ use super::{
ModeObjectVtable,
StaticModeObject,
atomic::*,
+ crtc::*,
};
/// The main trait for implementing the [`struct drm_plane`] API for [`Plane`]
@@ -607,6 +608,16 @@ pub trait RawPlaneState: AsRawPlaneState {
// invariant throughout the lifetime of the Plane
unsafe { Self::Plane::from_raw(self.as_raw().plane) }
}
+
+ /// Return the current [`OpaqueCrtc`] assigned to this plane, if there is one.
+ fn crtc<'a, 'b: 'a, D>(&'a self) -> Option<&'b OpaqueCrtc<D>>
+ where
+ Self::Plane: ModeObject<Driver = D>,
+ D: KmsDriver
+ {
+ // SAFETY: This cast is guaranteed safe by `OpaqueCrtc`s invariants.
+ NonNull::new(self.as_raw().crtc).map(|c| unsafe { OpaqueCrtc::from_raw(c.as_ptr()) })
+ }
}
impl<T: AsRawPlaneState + ?Sized> RawPlaneState for T {}
--
GitLab