Merge "SurfaceFlinger: check fence when acquiring buffer with PTS"

    const nsecs_t expectedPresentTime = mFlinger->mUseScheduler

            ? mFlinger->mScheduler->mPrimaryDispSync->expectedPresentTime()

            : mFlinger->mPrimaryDispSync->expectedPresentTime();

    // updateTexImage() below might drop the some buffers at the head of the queue if there is a

    // buffer behind them which is timely to be presented. However this buffer may not be signaled

    // yet. The code below makes sure that this wouldn't happen by setting maxFrameNumber to the

    // last buffer that was signaled.

    uint64_t lastSignaledFrameNumber = mLastFrameNumberReceived;

    {

        Mutex::Autolock lock(mQueueItemLock);

        for (int i = 0; i < mQueueItems.size(); i++) {

            bool fenceSignaled =

                    mQueueItems[i].mFenceTime->getSignalTime() != Fence::SIGNAL_TIME_PENDING;

            if (!fenceSignaled) {

                break;

            }

            lastSignaledFrameNumber = mQueueItems[i].mFrameNumber;

        }

    }

    const uint64_t maxFrameNumberToAcquire =

            std::min(mLastFrameNumberReceived.load(), lastSignaledFrameNumber);

    status_t updateResult =

            mConsumer->updateTexImage(&r, expectedPresentTime, &mAutoRefresh, &queuedBuffer,

                                      mLastFrameNumberReceived, releaseFence);

                                      maxFrameNumberToAcquire, releaseFence);

    if (updateResult == BufferQueue::PRESENT_LATER) {

        // Producer doesn't want buffer to be displayed yet.  Signal a

        // layer update so we check again at the next opportunity.