1 files changed, 90 insertions, 0 deletions
diff --git a/drm/DrmDisplayPipeline.h b/drm/DrmDisplayPipeline.h
new file mode 100644
index 0000000..7ec619e
--- /dev/null
+++ b/drm/DrmDisplayPipeline.h
@@ -0,0 +1,90 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef ANDROID_DRMDISPLAYPIPELINE_H_
+#define ANDROID_DRMDISPLAYPIPELINE_H_
+
+#include <memory>
+#include <vector>
+
+namespace android {
+
+class DrmConnector;
+class DrmDevice;
+class DrmPlane;
+class DrmCrtc;
+class DrmEncoder;
+class DrmAtomicStateManager;
+
+struct DrmDisplayPipeline;
+
+template <class O>
+class BindingOwner;
+
+template <class O>
+class PipelineBindable {
+  friend class BindingOwner<O>;
+
+ public:
+  auto *GetPipeline() {
+    return bound_pipeline_;
+  }
+
+  auto BindPipeline(DrmDisplayPipeline *pipeline,
+                    bool return_object_if_bound = false)
+      -> std::shared_ptr<BindingOwner<O>>;
+
+ private:
+  DrmDisplayPipeline *bound_pipeline_;
+  std::weak_ptr<BindingOwner<O>> owner_object_;
+};
+
+template <class B>
+class BindingOwner {
+ public:
+  explicit BindingOwner(B *pb) : bindable_(pb){};
+  ~BindingOwner() {
+    bindable_->bound_pipeline_ = nullptr;
+  }
+
+  B *Get() {
+    return bindable_;
+  }
+
+ private:
+  B *const bindable_;
+};
+
+struct DrmDisplayPipeline {
+  static auto CreatePipeline(DrmConnector &connector)
+      -> std::unique_ptr<DrmDisplayPipeline>;
+
+  auto GetUsablePlanes()
+      -> std::vector<std::shared_ptr<BindingOwner<DrmPlane>>>;
+
+  DrmDevice *device;
+
+  std::shared_ptr<BindingOwner<DrmConnector>> connector;
+  std::shared_ptr<BindingOwner<DrmEncoder>> encoder;
+  std::shared_ptr<BindingOwner<DrmCrtc>> crtc;
+  std::shared_ptr<BindingOwner<DrmPlane>> primary_plane;
+
+  std::unique_ptr<DrmAtomicStateManager> atomic_state_manager;
+};
+
+}  // namespace android
+
+#endif