2011-11-18 01:49:17 +00:00
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/*
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* Copyright (C) 2011 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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2012-03-01 23:44:37 +00:00
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#define ATRACE_TAG ATRACE_TAG_GRAPHICS
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2011-11-18 01:49:17 +00:00
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#include <stdint.h>
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#include <sys/types.h>
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2012-08-21 03:07:34 +00:00
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#include <cutils/compiler.h>
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2012-04-04 00:48:03 +00:00
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#include <gui/BitTube.h>
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2011-11-18 01:49:17 +00:00
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#include <gui/IDisplayEventConnection.h>
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#include <gui/DisplayEventReceiver.h>
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#include <utils/Errors.h>
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2012-07-24 06:11:29 +00:00
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#include <utils/String8.h>
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2012-03-01 23:44:37 +00:00
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#include <utils/Trace.h>
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2011-11-18 01:49:17 +00:00
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#include "EventThread.h"
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#include "SurfaceFlinger.h"
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// ---------------------------------------------------------------------------
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namespace android {
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// ---------------------------------------------------------------------------
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EventThread::EventThread(const sp<SurfaceFlinger>& flinger)
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2012-07-25 05:46:10 +00:00
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: mFlinger(flinger),
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2012-04-11 04:04:02 +00:00
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mUseSoftwareVSync(false),
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2012-07-24 06:11:29 +00:00
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mDebugVsyncEnabled(false) {
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2012-09-21 06:24:19 +00:00
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for (int32_t i=0 ; i<HWC_DISPLAY_TYPES_SUPPORTED ; i++) {
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mVSyncEvent[i].header.type = DisplayEventReceiver::DISPLAY_EVENT_VSYNC;
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mVSyncEvent[i].header.id = 0;
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mVSyncEvent[i].header.timestamp = 0;
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mVSyncEvent[i].vsync.count = 0;
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}
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2011-11-18 01:49:17 +00:00
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}
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void EventThread::onFirstRef() {
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run("EventThread", PRIORITY_URGENT_DISPLAY + PRIORITY_MORE_FAVORABLE);
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}
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2012-04-04 00:48:03 +00:00
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sp<EventThread::Connection> EventThread::createEventConnection() const {
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return new Connection(const_cast<EventThread*>(this));
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2012-01-25 00:39:14 +00:00
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}
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2011-11-18 01:49:17 +00:00
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status_t EventThread::registerDisplayEventConnection(
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2012-04-04 00:48:03 +00:00
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const sp<EventThread::Connection>& connection) {
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2011-11-18 01:49:17 +00:00
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Mutex::Autolock _l(mLock);
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2012-04-04 00:48:03 +00:00
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mDisplayEventConnections.add(connection);
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2012-06-15 06:39:35 +00:00
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mCondition.broadcast();
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2011-11-18 01:49:17 +00:00
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return NO_ERROR;
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}
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2011-12-07 01:22:19 +00:00
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void EventThread::removeDisplayEventConnection(
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2012-04-04 00:48:03 +00:00
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const wp<EventThread::Connection>& connection) {
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2011-12-05 22:33:34 +00:00
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Mutex::Autolock _l(mLock);
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2012-04-04 00:48:03 +00:00
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mDisplayEventConnections.remove(connection);
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2011-12-07 01:22:19 +00:00
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}
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void EventThread::setVsyncRate(uint32_t count,
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2012-04-04 00:48:03 +00:00
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const sp<EventThread::Connection>& connection) {
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2011-12-07 01:22:19 +00:00
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if (int32_t(count) >= 0) { // server must protect against bad params
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Mutex::Autolock _l(mLock);
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2012-04-04 00:48:03 +00:00
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const int32_t new_count = (count == 0) ? -1 : count;
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if (connection->count != new_count) {
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connection->count = new_count;
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2012-06-15 06:39:35 +00:00
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mCondition.broadcast();
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2011-12-07 01:22:19 +00:00
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}
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}
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}
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void EventThread::requestNextVsync(
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2012-04-04 00:48:03 +00:00
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const sp<EventThread::Connection>& connection) {
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2011-12-07 01:22:19 +00:00
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Mutex::Autolock _l(mLock);
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2012-04-04 00:48:03 +00:00
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if (connection->count < 0) {
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connection->count = 0;
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2012-06-15 06:39:35 +00:00
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mCondition.broadcast();
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2011-12-07 01:22:19 +00:00
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}
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2011-12-05 22:33:34 +00:00
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}
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2012-04-11 04:04:02 +00:00
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void EventThread::onScreenReleased() {
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Mutex::Autolock _l(mLock);
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if (!mUseSoftwareVSync) {
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2012-06-15 06:39:35 +00:00
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// disable reliance on h/w vsync
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mUseSoftwareVSync = true;
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mCondition.broadcast();
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2012-04-11 04:04:02 +00:00
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}
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}
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void EventThread::onScreenAcquired() {
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Mutex::Autolock _l(mLock);
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2012-06-15 06:39:35 +00:00
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if (mUseSoftwareVSync) {
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// resume use of h/w vsync
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mUseSoftwareVSync = false;
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mCondition.broadcast();
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}
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2012-04-11 04:04:02 +00:00
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}
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2012-09-20 00:31:36 +00:00
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void EventThread::onVSyncReceived(int type, nsecs_t timestamp) {
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2012-09-21 06:24:19 +00:00
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ALOGE_IF(type >= HWC_DISPLAY_TYPES_SUPPORTED,
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"received event for an invalid display (id=%d)", type);
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2012-04-04 05:09:52 +00:00
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Mutex::Autolock _l(mLock);
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2012-09-21 06:24:19 +00:00
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if (type < HWC_DISPLAY_TYPES_SUPPORTED) {
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mVSyncEvent[type].header.type = DisplayEventReceiver::DISPLAY_EVENT_VSYNC;
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mVSyncEvent[type].header.id = type;
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mVSyncEvent[type].header.timestamp = timestamp;
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mVSyncEvent[type].vsync.count++;
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mCondition.broadcast();
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}
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2012-04-04 05:09:52 +00:00
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}
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2012-09-20 00:31:36 +00:00
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void EventThread::onHotplugReceived(int type, bool connected) {
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2012-09-21 06:24:19 +00:00
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ALOGE_IF(type >= HWC_DISPLAY_TYPES_SUPPORTED,
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"received event for an invalid display (id=%d)", type);
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2012-09-20 00:31:36 +00:00
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Mutex::Autolock _l(mLock);
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2012-09-21 06:24:19 +00:00
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if (type < HWC_DISPLAY_TYPES_SUPPORTED) {
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DisplayEventReceiver::Event event;
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event.header.type = DisplayEventReceiver::DISPLAY_EVENT_HOTPLUG;
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event.header.id = type;
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event.header.timestamp = systemTime();
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event.hotplug.connected = connected;
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mPendingEvents.add(event);
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mCondition.broadcast();
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}
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2012-09-20 00:31:36 +00:00
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}
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2011-11-18 01:49:17 +00:00
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bool EventThread::threadLoop() {
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2012-09-21 06:14:05 +00:00
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DisplayEventReceiver::Event event;
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2012-08-21 03:07:34 +00:00
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Vector< sp<EventThread::Connection> > signalConnections;
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2012-09-21 06:14:05 +00:00
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signalConnections = waitForEvent(&event);
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2011-12-05 22:33:34 +00:00
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2012-09-20 00:31:36 +00:00
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// dispatch events to listeners...
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2012-08-21 22:47:28 +00:00
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const size_t count = signalConnections.size();
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for (size_t i=0 ; i<count ; i++) {
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const sp<Connection>& conn(signalConnections[i]);
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2012-09-21 06:14:05 +00:00
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// now see if we still need to report this event
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status_t err = conn->postEvent(event);
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2012-08-21 22:47:28 +00:00
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if (err == -EAGAIN || err == -EWOULDBLOCK) {
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// The destination doesn't accept events anymore, it's probably
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// full. For now, we just drop the events on the floor.
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2012-09-21 06:14:05 +00:00
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// FIXME: Note that some events cannot be dropped and would have
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// to be re-sent later.
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// Right-now we don't have the ability to do this.
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ALOGW("EventThread: dropping event (%08x) for connection %p",
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event.header.type, conn.get());
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2012-08-21 22:47:28 +00:00
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} else if (err < 0) {
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// handle any other error on the pipe as fatal. the only
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// reasonable thing to do is to clean-up this connection.
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// The most common error we'll get here is -EPIPE.
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removeDisplayEventConnection(signalConnections[i]);
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}
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}
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return true;
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}
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2012-08-21 03:07:34 +00:00
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2012-08-30 23:34:41 +00:00
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// This will return when (1) a vsync event has been received, and (2) there was
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// at least one connection interested in receiving it when we started waiting.
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2012-08-21 22:47:28 +00:00
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Vector< sp<EventThread::Connection> > EventThread::waitForEvent(
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DisplayEventReceiver::Event* event)
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{
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Mutex::Autolock _l(mLock);
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Vector< sp<EventThread::Connection> > signalConnections;
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2012-08-21 03:07:34 +00:00
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2012-08-21 22:47:28 +00:00
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do {
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2012-09-20 00:31:36 +00:00
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bool eventPending = false;
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2012-08-21 03:07:34 +00:00
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bool waitForVSync = false;
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2012-09-21 06:24:19 +00:00
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size_t vsyncCount = 0;
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nsecs_t timestamp = 0;
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for (int32_t i=0 ; i<HWC_DISPLAY_TYPES_SUPPORTED ; i++) {
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timestamp = mVSyncEvent[i].header.timestamp;
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if (timestamp) {
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// we have a vsync event to dispatch
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*event = mVSyncEvent[i];
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mVSyncEvent[i].header.timestamp = 0;
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vsyncCount = mVSyncEvent[i].vsync.count;
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break;
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}
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}
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if (!timestamp) {
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// no vsync event, see if there are some other event
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2012-09-20 00:31:36 +00:00
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eventPending = !mPendingEvents.isEmpty();
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if (eventPending) {
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// we have some other event to dispatch
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*event = mPendingEvents[0];
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mPendingEvents.removeAt(0);
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}
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}
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2012-08-21 22:47:28 +00:00
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// find out connections waiting for events
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2012-08-17 22:06:02 +00:00
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size_t count = mDisplayEventConnections.size();
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for (size_t i=0 ; i<count ; i++) {
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sp<Connection> connection(mDisplayEventConnections[i].promote());
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if (connection != NULL) {
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2012-09-21 06:14:05 +00:00
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bool added = false;
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2012-08-17 22:06:02 +00:00
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if (connection->count >= 0) {
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2012-08-21 03:07:34 +00:00
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// we need vsync events because at least
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// one connection is waiting for it
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waitForVSync = true;
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2012-08-21 22:47:28 +00:00
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if (timestamp) {
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// we consume the event only if it's time
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// (ie: we received a vsync event)
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if (connection->count == 0) {
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// fired this time around
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2012-08-21 03:07:34 +00:00
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connection->count = -1;
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2012-08-21 22:47:28 +00:00
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signalConnections.add(connection);
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2012-09-21 06:14:05 +00:00
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added = true;
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2012-08-21 22:47:28 +00:00
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} else if (connection->count == 1 ||
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(vsyncCount % connection->count) == 0) {
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// continuous event, and time to report it
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signalConnections.add(connection);
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2012-09-21 06:14:05 +00:00
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added = true;
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2012-08-21 03:07:34 +00:00
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}
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}
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2012-01-10 02:19:18 +00:00
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}
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2012-09-21 06:14:05 +00:00
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if (eventPending && !timestamp && !added) {
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// we don't have a vsync event to process
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// (timestamp==0), but we have some pending
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// messages.
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signalConnections.add(connection);
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}
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2012-08-21 22:47:28 +00:00
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} else {
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// we couldn't promote this reference, the connection has
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// died, so clean-up!
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mDisplayEventConnections.removeAt(i);
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--i; --count;
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2012-04-04 05:09:52 +00:00
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}
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2012-08-17 22:06:02 +00:00
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}
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2012-04-04 05:09:52 +00:00
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2012-08-21 22:47:28 +00:00
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// Here we figure out if we need to enable or disable vsyncs
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if (timestamp && !waitForVSync) {
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// we received a VSYNC but we have no clients
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// don't report it, and disable VSYNC events
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disableVSyncLocked();
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} else if (!timestamp && waitForVSync) {
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2012-08-30 23:34:41 +00:00
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// we have at least one client, so we want vsync enabled
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// (TODO: this function is called right after we finish
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// notifying clients of a vsync, so this call will be made
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// at the vsync rate, e.g. 60fps. If we can accurately
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// track the current state we could avoid making this call
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// so often.)
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2012-08-21 22:47:28 +00:00
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enableVSyncLocked();
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2012-08-17 22:06:02 +00:00
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}
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2012-04-04 05:09:52 +00:00
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2012-08-30 23:34:41 +00:00
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// note: !timestamp implies signalConnections.isEmpty(), because we
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// don't populate signalConnections if there's no vsync pending
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2012-09-20 00:31:36 +00:00
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if (!timestamp && !eventPending) {
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2012-08-21 22:47:28 +00:00
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// wait for something to happen
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2012-08-30 23:34:41 +00:00
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if (waitForVSync) {
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// This is where we spend most of our time, waiting
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// for vsync events and new client registrations.
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//
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// If the screen is off, we can't use h/w vsync, so we
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// use a 16ms timeout instead. It doesn't need to be
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// precise, we just need to keep feeding our clients.
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//
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// We don't want to stall if there's a driver bug, so we
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// use a (long) timeout when waiting for h/w vsync, and
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// generate fake events when necessary.
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bool softwareSync = mUseSoftwareVSync;
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nsecs_t timeout = softwareSync ? ms2ns(16) : ms2ns(1000);
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if (mCondition.waitRelative(mLock, timeout) == TIMED_OUT) {
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if (!softwareSync) {
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ALOGW("Timed out waiting for hw vsync; faking it");
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}
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2012-09-21 06:24:19 +00:00
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// FIXME: how do we decide which display id the fake
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// vsync came from ?
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mVSyncEvent[0].header.type = DisplayEventReceiver::DISPLAY_EVENT_VSYNC;
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mVSyncEvent[0].header.id = HWC_DISPLAY_PRIMARY;
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mVSyncEvent[0].header.timestamp = systemTime(SYSTEM_TIME_MONOTONIC);
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mVSyncEvent[0].vsync.count++;
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2012-08-21 22:47:28 +00:00
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}
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} else {
|
2012-08-30 23:34:41 +00:00
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// Nobody is interested in vsync, so we just want to sleep.
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// h/w vsync should be disabled, so this will wait until we
|
|
|
|
// get a new connection, or an existing connection becomes
|
|
|
|
// interested in receiving vsync again.
|
2012-08-21 03:07:34 +00:00
|
|
|
mCondition.wait(mLock);
|
|
|
|
}
|
2012-04-04 05:09:52 +00:00
|
|
|
}
|
2012-08-21 22:47:28 +00:00
|
|
|
} while (signalConnections.isEmpty());
|
2011-11-18 01:49:17 +00:00
|
|
|
|
2012-08-21 22:47:28 +00:00
|
|
|
// here we're guaranteed to have a timestamp and some connections to signal
|
2012-08-30 23:34:41 +00:00
|
|
|
// (The connections might have dropped out of mDisplayEventConnections
|
|
|
|
// while we were asleep, but we'll still have strong references to them.)
|
2012-08-21 22:47:28 +00:00
|
|
|
return signalConnections;
|
2011-11-18 01:49:17 +00:00
|
|
|
}
|
|
|
|
|
2012-04-11 04:04:02 +00:00
|
|
|
void EventThread::enableVSyncLocked() {
|
|
|
|
if (!mUseSoftwareVSync) {
|
|
|
|
// never enable h/w VSYNC when screen is off
|
2012-07-25 05:46:10 +00:00
|
|
|
mFlinger->eventControl(SurfaceFlinger::EVENT_VSYNC, true);
|
|
|
|
mPowerHAL.vsyncHint(true);
|
2012-04-11 04:04:02 +00:00
|
|
|
}
|
2012-04-11 01:25:31 +00:00
|
|
|
mDebugVsyncEnabled = true;
|
|
|
|
}
|
|
|
|
|
2012-04-11 04:04:02 +00:00
|
|
|
void EventThread::disableVSyncLocked() {
|
2012-07-25 05:46:10 +00:00
|
|
|
mFlinger->eventControl(SurfaceFlinger::EVENT_VSYNC, false);
|
|
|
|
mPowerHAL.vsyncHint(false);
|
2012-04-11 01:25:31 +00:00
|
|
|
mDebugVsyncEnabled = false;
|
|
|
|
}
|
|
|
|
|
2011-11-18 01:49:17 +00:00
|
|
|
void EventThread::dump(String8& result, char* buffer, size_t SIZE) const {
|
|
|
|
Mutex::Autolock _l(mLock);
|
2012-04-11 01:25:31 +00:00
|
|
|
result.appendFormat("VSYNC state: %s\n",
|
|
|
|
mDebugVsyncEnabled?"enabled":"disabled");
|
2012-04-11 04:04:02 +00:00
|
|
|
result.appendFormat(" soft-vsync: %s\n",
|
|
|
|
mUseSoftwareVSync?"enabled":"disabled");
|
2012-04-11 01:25:31 +00:00
|
|
|
result.appendFormat(" numListeners=%u,\n events-delivered: %u\n",
|
2012-09-21 06:24:19 +00:00
|
|
|
mDisplayEventConnections.size(),
|
|
|
|
mVSyncEvent[HWC_DISPLAY_PRIMARY].vsync.count);
|
2012-04-11 01:25:31 +00:00
|
|
|
for (size_t i=0 ; i<mDisplayEventConnections.size() ; i++) {
|
|
|
|
sp<Connection> connection =
|
|
|
|
mDisplayEventConnections.itemAt(i).promote();
|
|
|
|
result.appendFormat(" %p: count=%d\n",
|
|
|
|
connection.get(), connection!=NULL ? connection->count : 0);
|
|
|
|
}
|
2011-11-18 01:49:17 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
// ---------------------------------------------------------------------------
|
|
|
|
|
2012-04-04 00:48:03 +00:00
|
|
|
EventThread::Connection::Connection(
|
|
|
|
const sp<EventThread>& eventThread)
|
|
|
|
: count(-1), mEventThread(eventThread), mChannel(new BitTube())
|
|
|
|
{
|
|
|
|
}
|
|
|
|
|
|
|
|
EventThread::Connection::~Connection() {
|
2012-08-21 22:47:28 +00:00
|
|
|
// do nothing here -- clean-up will happen automatically
|
|
|
|
// when the main thread wakes up
|
2012-04-04 00:48:03 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
void EventThread::Connection::onFirstRef() {
|
|
|
|
// NOTE: mEventThread doesn't hold a strong reference on us
|
|
|
|
mEventThread->registerDisplayEventConnection(this);
|
|
|
|
}
|
|
|
|
|
|
|
|
sp<BitTube> EventThread::Connection::getDataChannel() const {
|
|
|
|
return mChannel;
|
|
|
|
}
|
|
|
|
|
|
|
|
void EventThread::Connection::setVsyncRate(uint32_t count) {
|
|
|
|
mEventThread->setVsyncRate(count, this);
|
|
|
|
}
|
|
|
|
|
|
|
|
void EventThread::Connection::requestNextVsync() {
|
|
|
|
mEventThread->requestNextVsync(this);
|
|
|
|
}
|
|
|
|
|
|
|
|
status_t EventThread::Connection::postEvent(
|
|
|
|
const DisplayEventReceiver::Event& event) {
|
|
|
|
ssize_t size = DisplayEventReceiver::sendEvents(mChannel, &event, 1);
|
|
|
|
return size < 0 ? status_t(size) : status_t(NO_ERROR);
|
|
|
|
}
|
|
|
|
|
|
|
|
// ---------------------------------------------------------------------------
|
|
|
|
|
2011-11-18 01:49:17 +00:00
|
|
|
}; // namespace android
|