CE: Must dequeue a buffer if flipClientTarget requested
To match the logic that always queues a buffer if the HWC has a
flipClientTarget request for the current frame, we must also always
dequeue a buffer, even if no client composition is being performed.
This is an port of an (as yet uncommitted) AOSP change with a ChangeId of
I933cbae2f09f81eef6555b1bb1e5991d2c450930, due to the underlying code
having been refactored.
This version also adds and updates unit tests which were added as part
of the refactoring.
Bug: 151698217
Test: libcompositionengine_test
Test: libsurfaceflinger_test
Change-Id: Ia8a1470affb2596b27986cc4153417f48cf4ed1c
diff --git a/services/surfaceflinger/CompositionEngine/src/Output.cpp b/services/surfaceflinger/CompositionEngine/src/Output.cpp
index 34d0cb2..cb7ddda 100644
--- a/services/surfaceflinger/CompositionEngine/src/Output.cpp
+++ b/services/surfaceflinger/CompositionEngine/src/Output.cpp
@@ -815,6 +815,43 @@
OutputCompositionState& outputCompositionState = editState();
const TracedOrdinal<bool> hasClientComposition = {"hasClientComposition",
outputState.usesClientComposition};
+
+ auto& renderEngine = getCompositionEngine().getRenderEngine();
+ const bool supportsProtectedContent = renderEngine.supportsProtectedContent();
+
+ // If we the display is secure, protected content support is enabled, and at
+ // least one layer has protected content, we need to use a secure back
+ // buffer.
+ if (outputState.isSecure && supportsProtectedContent) {
+ auto layers = getOutputLayersOrderedByZ();
+ bool needsProtected = std::any_of(layers.begin(), layers.end(), [](auto* layer) {
+ return layer->getLayerFE().getCompositionState()->hasProtectedContent;
+ });
+ if (needsProtected != renderEngine.isProtected()) {
+ renderEngine.useProtectedContext(needsProtected);
+ }
+ if (needsProtected != mRenderSurface->isProtected() &&
+ needsProtected == renderEngine.isProtected()) {
+ mRenderSurface->setProtected(needsProtected);
+ }
+ }
+
+ base::unique_fd fd;
+ sp<GraphicBuffer> buf;
+
+ // If we aren't doing client composition on this output, but do have a
+ // flipClientTarget request for this frame on this output, we still need to
+ // dequeue a buffer.
+ if (hasClientComposition || outputState.flipClientTarget) {
+ buf = mRenderSurface->dequeueBuffer(&fd);
+ if (buf == nullptr) {
+ ALOGW("Dequeuing buffer for display [%s] failed, bailing out of "
+ "client composition for this frame",
+ mName.c_str());
+ return {};
+ }
+ }
+
base::unique_fd readyFence;
if (!hasClientComposition) {
setExpensiveRenderingExpected(false);
@@ -823,9 +860,6 @@
ALOGV("hasClientComposition");
- auto& renderEngine = getCompositionEngine().getRenderEngine();
- const bool supportsProtectedContent = renderEngine.supportsProtectedContent();
-
renderengine::DisplaySettings clientCompositionDisplay;
clientCompositionDisplay.physicalDisplay = outputState.destinationClip;
clientCompositionDisplay.clip = outputState.sourceClip;
@@ -851,32 +885,6 @@
clientCompositionDisplay.outputDataspace);
appendRegionFlashRequests(debugRegion, clientCompositionLayers);
- // If we the display is secure, protected content support is enabled, and at
- // least one layer has protected content, we need to use a secure back
- // buffer.
- if (outputState.isSecure && supportsProtectedContent) {
- auto layers = getOutputLayersOrderedByZ();
- bool needsProtected = std::any_of(layers.begin(), layers.end(), [](auto* layer) {
- return layer->getLayerFE().getCompositionState()->hasProtectedContent;
- });
- if (needsProtected != renderEngine.isProtected()) {
- renderEngine.useProtectedContext(needsProtected);
- }
- if (needsProtected != mRenderSurface->isProtected() &&
- needsProtected == renderEngine.isProtected()) {
- mRenderSurface->setProtected(needsProtected);
- }
- }
-
- base::unique_fd fd;
- sp<GraphicBuffer> buf = mRenderSurface->dequeueBuffer(&fd);
- if (buf == nullptr) {
- ALOGW("Dequeuing buffer for display [%s] failed, bailing out of "
- "client composition for this frame",
- mName.c_str());
- return std::nullopt;
- }
-
// Check if the client composition requests were rendered into the provided graphic buffer. If
// so, we can reuse the buffer and avoid client composition.
if (mClientCompositionRequestCache) {