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Mon, 30 Sep 2024 19:39:38 -0400 X-MC-Unique: 8xusCUW9P3-5hWO4SgwbBw-1 Received: from mx-prod-int-01.mail-002.prod.us-west-2.aws.redhat.com (unknown [10.30.177.4]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mx-prod-mc-04.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id E2E5C196A40C; Mon, 30 Sep 2024 23:39:35 +0000 (UTC) Received: from chopper.redhat.com (unknown [10.22.32.36]) by mx-prod-int-01.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTP id E9A5F3003DEC; Mon, 30 Sep 2024 23:39:32 +0000 (UTC) From: Lyude Paul To: dri-devel@lists.freedesktop.org, rust-for-linux@vger.kernel.org Cc: Asahi Lina , Danilo Krummrich , mcanal@igalia.com, airlied@redhat.com, zhiw@nvidia.com, cjia@nvidia.com, jhubbard@nvidia.com, Miguel Ojeda , Alex Gaynor , Wedson Almeida Filho , Boqun Feng , Gary Guo , =?UTF-8?q?Bj=C3=B6rn=20Roy=20Baron?= , Benno Lossin , Andreas Hindborg , Alice Ryhl , Trevor Gross , linux-kernel@vger.kernel.org (open list) Subject: [WIP RFC v2 18/35] rust: drm/kms: Add RawPlane and RawPlaneState Date: Mon, 30 Sep 2024 19:10:01 -0400 Message-ID: <20240930233257.1189730-19-lyude@redhat.com> In-Reply-To: <20240930233257.1189730-1-lyude@redhat.com> References: <20240930233257.1189730-1-lyude@redhat.com> Precedence: bulk X-Mailing-List: rust-for-linux@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Scanned-By: MIMEDefang 3.4.1 on 10.30.177.4 Same thing as RawCrtc and RawCrtcState, but for DRM planes now Signed-off-by: Lyude Paul --- rust/kernel/drm/kms/plane.rs | 35 +++++++++++++++++++++++++++++++++++ 1 file changed, 35 insertions(+) diff --git a/rust/kernel/drm/kms/plane.rs b/rust/kernel/drm/kms/plane.rs index 3ace487316d46..1c151ae3b3dcc 100644 --- a/rust/kernel/drm/kms/plane.rs +++ b/rust/kernel/drm/kms/plane.rs @@ -312,6 +312,27 @@ unsafe impl Send for Plane {} // SAFETY: Our interface is thread-safe. unsafe impl Sync for Plane {} +/// Common methods available on any type which implements [`AsRawPlane`]. +/// +/// This is implemented internally by DRM, and provides many of the basic methods for working with +/// planes. +pub trait RawPlane: AsRawPlane { + /// Return the index of this DRM plane + #[inline] + fn index(&self) -> u32 { + // SAFETY: The index is initialized by the time we expose `Plane` objects to users, and is + // invariant throughout the lifetime of the `Plane` + unsafe { (*self.as_raw()).index } + } + + /// Return the index of this DRM plane in the form of a bitmask + #[inline] + fn mask(&self) -> u32 { + 1 << self.index() + } +} +impl RawPlane for T {} + /// A [`struct drm_plane`] without a known [`DriverPlane`] implementation. /// /// This is mainly for situations where our bindings can't infer the [`DriverPlane`] implementation @@ -426,6 +447,20 @@ pub trait FromRawPlaneState: AsRawPlaneState { unsafe fn from_raw_mut<'a>(ptr: *mut bindings::drm_plane_state) -> &'a mut Self; } +/// Common methods available on any type which implements [`AsRawPlane`]. +/// +/// This is implemented internally by DRM, and provides many of the basic methods for working with +/// the atomic state of [`Plane`]s. +pub trait RawPlaneState: AsRawPlaneState { + /// Return the plane that this plane state belongs to. + fn plane(&self) -> &Self::Plane { + // SAFETY: The index is initialized by the time we expose Plane objects to users, and is + // invariant throughout the lifetime of the Plane + unsafe { Self::Plane::from_raw(self.as_raw().plane) } + } +} +impl RawPlaneState for T {} + /// The main interface for a [`struct drm_plane_state`]. /// /// This type is the main interface for dealing with the atomic state of DRM planes. In addition, it -- 2.46.1