commit 9e56aa0fdb5f7121b9b975c6c16db103ea4d2fe9
author Dan Stoza <stoza@google.com> Mon Nov 02 13:00:03 2015 -0800
committer Dan Stoza <stoza@google.com> Mon Feb 29 08:24:14 2016 -0800
tree 3c91c52815a2a0bb851b0280e8be70a49a638208
parent fc4e202b33d33b5e11181f09a2229d3ef7ae925a

Switch SurfaceFlinger to HWC 2.0

Enables SurfaceFlinger to speak to version 2.0 of the Hardware Composer
HAL instead of version 1.x (also removing support for the framebuffer
HAL). By default, however, this functionality is disabled. In order to
enable it, USE_HWC2 must be set to true in Android.mk.

Change-Id: I4589e02ac2165236b10ff2f7cb772f87e0d3daab

services/surfaceflinger/SurfaceFlingerConsumer.cpp

diff --git a/services/surfaceflinger/SurfaceFlingerConsumer.cpp b/services/surfaceflinger/SurfaceFlingerConsumer.cpp
index d3b66e6..4c80fa0 100644
--- a/services/surfaceflinger/SurfaceFlingerConsumer.cpp
+++ b/services/surfaceflinger/SurfaceFlingerConsumer.cpp
@@ -87,7 +87,11 @@
     }
 
     // Release the previous buffer.
+#ifdef USE_HWC2
+    err = updateAndReleaseLocked(item, &mPendingRelease);
+#else
     err = updateAndReleaseLocked(item);
+#endif
     if (err != NO_ERROR) {
         return err;
     }
@@ -183,6 +187,40 @@
     return nextRefresh + extraPadding;
 }
 
+#ifdef USE_HWC2
+void SurfaceFlingerConsumer::setReleaseFence(const sp<Fence>& fence)
+{
+    if (!mPendingRelease.isPending) {
+        GLConsumer::setReleaseFence(fence);
+        return;
+    }
+    auto currentTexture = mPendingRelease.currentTexture;
+    if (fence->isValid() &&
+            currentTexture != BufferQueue::INVALID_BUFFER_SLOT) {
+        status_t result = addReleaseFence(currentTexture,
+                mPendingRelease.graphicBuffer, fence);
+        ALOGE_IF(result != NO_ERROR, "setReleaseFence: failed to add the"
+                " fence: %s (%d)", strerror(-result), result);
+    }
+}
+
+void SurfaceFlingerConsumer::releasePendingBuffer()
+{
+    if (!mPendingRelease.isPending) {
+        ALOGV("Pending buffer already released");
+        return;
+    }
+    ALOGV("Releasing pending buffer");
+    Mutex::Autolock lock(mMutex);
+    status_t result = releaseBufferLocked(mPendingRelease.currentTexture,
+            mPendingRelease.graphicBuffer, mPendingRelease.display,
+            mPendingRelease.fence);
+    ALOGE_IF(result != NO_ERROR, "releasePendingBuffer failed: %s (%d)",
+            strerror(-result), result);
+    mPendingRelease = PendingRelease();
+}
+#endif
+
 void SurfaceFlingerConsumer::setContentsChangedListener(
         const wp<ContentsChangedListener>& listener) {
     setFrameAvailableListener(listener);