drm_hwcomposer: Rework KMS composition planner + plane sharing support
Rewrite Layer-to-Plane planner. Get rid of ~200 redundant lines of code
+ added plane sharing functionality.
Closes: https://gitlab.freedesktop.org/drm-hwcomposer/drm-hwcomposer/-/issues/11
Signed-off-by: Roman Stratiienko <roman.o.stratiienko@globallogic.com>
diff --git a/compositor/DrmKmsPlan.cpp b/compositor/DrmKmsPlan.cpp
new file mode 100644
index 0000000..966bd4e
--- /dev/null
+++ b/compositor/DrmKmsPlan.cpp
@@ -0,0 +1,59 @@
+/*
+ * 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.
+ */
+
+#define LOG_TAG "hwc-composition-drm-kms-plan"
+
+#include "DrmKmsPlan.h"
+
+#include "drm/DrmDevice.h"
+#include "drm/DrmPlane.h"
+#include "utils/log.h"
+
+namespace android {
+auto DrmKmsPlan::CreateDrmKmsPlan(DrmDisplayPipeline &pipe,
+ std::vector<DrmHwcLayer> composition)
+ -> std::unique_ptr<DrmKmsPlan> {
+ auto plan = std::make_unique<DrmKmsPlan>();
+
+ auto avail_planes = pipe.GetUsablePlanes();
+
+ int z_pos = 0;
+ for (auto &dhl : composition) {
+ std::shared_ptr<BindingOwner<DrmPlane>> plane;
+
+ /* Skip unsupported planes */
+ do {
+ if (avail_planes.empty()) {
+ return {};
+ }
+
+ plane = *avail_planes.begin();
+ avail_planes.erase(avail_planes.begin());
+ } while (!plane->Get()->IsValidForLayer(&dhl));
+
+ LayerToPlaneJoining joining = {
+ .layer = std::move(dhl),
+ .plane = plane,
+ .z_pos = z_pos++,
+ };
+
+ plan->plan.emplace_back(std::move(joining));
+ }
+
+ return plan;
+}
+
+} // namespace android