SurfaceFlinger: fix setDesiredActiveConfig am: 59db0a38

    auto refreshRate = mRefreshRateConfigs->getRefreshRateFromConfigId(info.configId);

    ALOGV("setDesiredActiveConfig(%s)", refreshRate.name.c_str());

    // Don't check against the current mode yet. Worst case we set the desired

    // config twice. However event generation config might have changed so we need to update it

    // accordingly

    std::lock_guard<std::mutex> lock(mActiveConfigLock);

    if (mDesiredActiveConfigChanged) {

        // If a config change is pending, just cache the latest request in

        // mDesiredActiveConfig

        const Scheduler::ConfigEvent prevConfig = mDesiredActiveConfig.event;

        mDesiredActiveConfig = info;

        mDesiredActiveConfig.event = mDesiredActiveConfig.event | prevConfig;

    } else {

        // Check is we are already at the desired config

        const auto display = getDefaultDisplayDeviceLocked();

        if (!display || display->getActiveConfig() == refreshRate.configId) {

            return;

        }

        // Initiate a config change.

        mDesiredActiveConfigChanged = true;

        mDesiredActiveConfig = info;

    if (!mDesiredActiveConfigChanged) {

        // This will trigger HWC refresh without resetting the idle timer.

        repaintEverythingForHWC();

        // Start receiving vsync samples now, so that we can detect a period

        mPhaseConfiguration->setRefreshRateFps(refreshRate.fps);

        mVSyncModulator->setPhaseOffsets(mPhaseConfiguration->getCurrentOffsets());

    }

    mDesiredActiveConfigChanged = true;

    if (mRefreshRateOverlay) {

        mRefreshRateOverlay->changeRefreshRate(refreshRate);