drm_hwcomposer: Add resource manager support
Add a resource manager class that is responsible for detecting all
kms devices and allocates unique display numbers for every detected
display.
This is controlled by the value of hwc.drm.device property, if it ends
with a %, it will try to open minor devices until an error is detected.
E.g: /dev/dri/card%
Additionally, this will be used for finding an available writeback
connector that will be used for the flattening of the currently
displayed scene.
Signed-off-by: Alexandru Gheorghe <alexandru-cosmin.gheorghe@arm.com>
diff --git a/resourcemanager.h b/resourcemanager.h
new file mode 100644
index 0000000..4b51608
--- /dev/null
+++ b/resourcemanager.h
@@ -0,0 +1,47 @@
+/*
+ * Copyright (C) 2018 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 RESOURCEMANAGER_H
+#define RESOURCEMANAGER_H
+
+#include "drmdevice.h"
+#include "platform.h"
+
+#include <string.h>
+
+namespace android {
+
+class ResourceManager {
+ public:
+ ResourceManager();
+ ResourceManager(const ResourceManager &) = delete;
+ ResourceManager &operator=(const ResourceManager &) = delete;
+ int Init();
+ DrmDevice *GetDrmDevice(int display);
+ std::shared_ptr<Importer> GetImporter(int display);
+ const gralloc_module_t *gralloc();
+
+ private:
+ int AddDrmDevice(std::string path);
+
+ int num_displays_;
+ std::vector<std::unique_ptr<DrmDevice>> drms_;
+ std::vector<std::shared_ptr<Importer>> importers_;
+ const gralloc_module_t *gralloc_;
+};
+}
+
+#endif // RESOURCEMANAGER_H