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@xxxxxxxxxx>
---
rust/kernel/drm/kms/plane.rs | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/rust/kernel/drm/kms/plane.rs b/rust/kernel/drm/kms/plane.rs
index 04f1bdfbb1ea2..4d16d53179fca 100644
--- a/rust/kernel/drm/kms/plane.rs
+++ b/rust/kernel/drm/kms/plane.rs
@@ -30,6 +30,7 @@
ModeObject,
StaticModeObject,
atomic::*,
+ crtc::*,
};
/// The main trait for implementing the [`struct drm_plane`] API for [`Plane`]
@@ -489,6 +490,12 @@ fn plane(&self) -> &Self::Plane {
// 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>(&'a self) -> Option<&'b OpaqueCrtc<<Self::Plane as ModeObject>::Driver>> {
+ // 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 {}
--
2.46.1
