fix an issue where SF would spin if /sys/power/wait_for_fb_xxx don't exist
we now exit the Display thread on any error happening on these files.
also refactor the code and remove a lot of unused stuff.
Change-Id: I8d080c35b211890ca20ae09fa36fbdccdf5669a8
diff --git a/services/surfaceflinger/DisplayHardware/DisplayHardwareBase.cpp b/services/surfaceflinger/DisplayHardware/DisplayHardwareBase.cpp
index f4afeea..09f1906 100644
--- a/services/surfaceflinger/DisplayHardware/DisplayHardwareBase.cpp
+++ b/services/surfaceflinger/DisplayHardware/DisplayHardwareBase.cpp
@@ -1,5 +1,5 @@
/*
- * Copyright (C) 2007 The Android Open Source Project
+ * Copyright (C) 2012 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
@@ -14,7 +14,6 @@
* limitations under the License.
*/
-#include <assert.h>
#include <errno.h>
#include <stdlib.h>
#include <stdio.h>
@@ -22,15 +21,6 @@
#include <unistd.h>
#include <fcntl.h>
-#include <signal.h>
-#include <termios.h>
-#include <sys/ioctl.h>
-#include <sys/mman.h>
-#include <sys/time.h>
-#include <sys/types.h>
-#include <sys/resource.h>
-
-#include <linux/unistd.h>
#include <utils/Log.h>
@@ -45,39 +35,30 @@
// ----------------------------------------------------------------------------
-DisplayHardwareBase::DisplayEventThreadBase::DisplayEventThreadBase(
+DisplayHardwareBase::DisplayEventThread::DisplayEventThread(
const sp<SurfaceFlinger>& flinger)
: Thread(false), mFlinger(flinger) {
}
-DisplayHardwareBase::DisplayEventThreadBase::~DisplayEventThreadBase() {
+DisplayHardwareBase::DisplayEventThread::~DisplayEventThread() {
}
-// ----------------------------------------------------------------------------
-
-DisplayHardwareBase::DisplayEventThread::DisplayEventThread(
- const sp<SurfaceFlinger>& flinger)
- : DisplayEventThreadBase(flinger)
-{
+void DisplayHardwareBase::DisplayEventThread::onFirstRef() {
+ if (initCheck() == NO_ERROR) {
+ run("DisplayEventThread", PRIORITY_URGENT_DISPLAY);
+ } else {
+ ALOGW("/sys/power/wait_for_fb_{wake|sleep} don't exist");
+ }
}
-DisplayHardwareBase::DisplayEventThread::~DisplayEventThread()
-{
+status_t DisplayHardwareBase::DisplayEventThread::initCheck() const {
+ return ((access(kSleepFileName, R_OK) == 0 &&
+ access(kWakeFileName, R_OK) == 0)) ? NO_ERROR : NO_INIT;
}
-bool DisplayHardwareBase::DisplayEventThread::threadLoop()
-{
- int err = 0;
- char buf;
- int fd;
+bool DisplayHardwareBase::DisplayEventThread::threadLoop() {
- fd = open(kSleepFileName, O_RDONLY, 0);
- do {
- err = read(fd, &buf, 1);
- } while (err < 0 && errno == EINTR);
- close(fd);
- ALOGW_IF(err<0, "ANDROID_WAIT_FOR_FB_SLEEP failed (%s)", strerror(errno));
- if (err >= 0) {
+ if (waitForFbSleep() == NO_ERROR) {
sp<SurfaceFlinger> flinger = mFlinger.promote();
ALOGD("About to give-up screen, flinger = %p", flinger.get());
if (flinger != 0) {
@@ -85,39 +66,51 @@
flinger->screenReleased(0);
mBarrier.wait();
}
+ if (waitForFbWake() == NO_ERROR) {
+ sp<SurfaceFlinger> flinger = mFlinger.promote();
+ ALOGD("Screen about to return, flinger = %p", flinger.get());
+ if (flinger != 0) {
+ flinger->screenAcquired(0);
+ }
+ return true;
+ }
}
- fd = open(kWakeFileName, O_RDONLY, 0);
+
+ // error, exit the thread
+ return false;
+}
+
+status_t DisplayHardwareBase::DisplayEventThread::waitForFbSleep() {
+ int err = 0;
+ char buf;
+ int fd = open(kSleepFileName, O_RDONLY, 0);
+ // if the file doesn't exist, the error will be caught in read() below
do {
- err = read(fd, &buf, 1);
+ err = read(fd, &buf, 1);
} while (err < 0 && errno == EINTR);
close(fd);
- ALOGW_IF(err<0, "ANDROID_WAIT_FOR_FB_WAKE failed (%s)", strerror(errno));
- if (err >= 0) {
- sp<SurfaceFlinger> flinger = mFlinger.promote();
- ALOGD("Screen about to return, flinger = %p", flinger.get());
- if (flinger != 0)
- flinger->screenAcquired(0);
- }
- return true;
+ ALOGE_IF(err<0, "*** ANDROID_WAIT_FOR_FB_SLEEP failed (%s)", strerror(errno));
+ return err < 0 ? -errno : int(NO_ERROR);
}
-status_t DisplayHardwareBase::DisplayEventThread::releaseScreen() const
-{
+status_t DisplayHardwareBase::DisplayEventThread::waitForFbWake() {
+ int err = 0;
+ char buf;
+ int fd = open(kWakeFileName, O_RDONLY, 0);
+ // if the file doesn't exist, the error will be caught in read() below
+ do {
+ err = read(fd, &buf, 1);
+ } while (err < 0 && errno == EINTR);
+ close(fd);
+ ALOGE_IF(err<0, "*** ANDROID_WAIT_FOR_FB_WAKE failed (%s)", strerror(errno));
+ return err < 0 ? -errno : int(NO_ERROR);
+}
+
+status_t DisplayHardwareBase::DisplayEventThread::releaseScreen() const {
mBarrier.open();
return NO_ERROR;
}
-status_t DisplayHardwareBase::DisplayEventThread::readyToRun()
-{
- return NO_ERROR;
-}
-
-status_t DisplayHardwareBase::DisplayEventThread::initCheck() const
-{
- return ((access(kSleepFileName, R_OK) == 0 &&
- access(kWakeFileName, R_OK) == 0)) ? NO_ERROR : NO_INIT;
-}
-
// ----------------------------------------------------------------------------
DisplayHardwareBase::DisplayHardwareBase(const sp<SurfaceFlinger>& flinger,
@@ -127,35 +120,27 @@
mDisplayEventThread = new DisplayEventThread(flinger);
}
-DisplayHardwareBase::~DisplayHardwareBase()
-{
+DisplayHardwareBase::~DisplayHardwareBase() {
// request exit
mDisplayEventThread->requestExitAndWait();
}
-bool DisplayHardwareBase::canDraw() const
-{
+bool DisplayHardwareBase::canDraw() const {
return mScreenAcquired;
}
-void DisplayHardwareBase::releaseScreen() const
-{
+void DisplayHardwareBase::releaseScreen() const {
status_t err = mDisplayEventThread->releaseScreen();
if (err >= 0) {
mScreenAcquired = false;
}
}
-void DisplayHardwareBase::acquireScreen() const
-{
- status_t err = mDisplayEventThread->acquireScreen();
- if (err >= 0) {
- mScreenAcquired = true;
- }
+void DisplayHardwareBase::acquireScreen() const {
+ mScreenAcquired = true;
}
-bool DisplayHardwareBase::isScreenAcquired() const
-{
+bool DisplayHardwareBase::isScreenAcquired() const {
return mScreenAcquired;
}
diff --git a/services/surfaceflinger/DisplayHardware/DisplayHardwareBase.h b/services/surfaceflinger/DisplayHardware/DisplayHardwareBase.h
index ef2df43..91ea602 100644
--- a/services/surfaceflinger/DisplayHardware/DisplayHardwareBase.h
+++ b/services/surfaceflinger/DisplayHardware/DisplayHardwareBase.h
@@ -1,5 +1,5 @@
/*
- * Copyright (C) 2007 The Android Open Source Project
+ * Copyright (C) 2012 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
@@ -20,8 +20,6 @@
#include <stdint.h>
#include <utils/RefBase.h>
#include <utils/threads.h>
-#include <linux/kd.h>
-#include <linux/vt.h>
#include "Barrier.h"
namespace android {
@@ -31,11 +29,11 @@
class DisplayHardwareBase
{
public:
- DisplayHardwareBase(
- const sp<SurfaceFlinger>& flinger,
- uint32_t displayIndex);
+ DisplayHardwareBase(
+ const sp<SurfaceFlinger>& flinger,
+ uint32_t displayIndex);
- ~DisplayHardwareBase();
+ ~DisplayHardwareBase();
// console management
void releaseScreen() const;
@@ -46,34 +44,22 @@
private:
- class DisplayEventThreadBase : public Thread {
- protected:
+ class DisplayEventThread : public Thread {
wp<SurfaceFlinger> mFlinger;
- public:
- DisplayEventThreadBase(const sp<SurfaceFlinger>& flinger);
- virtual ~DisplayEventThreadBase();
- virtual void onFirstRef() {
- run("DisplayEventThread", PRIORITY_URGENT_DISPLAY);
- }
- virtual status_t acquireScreen() const { return NO_ERROR; };
- virtual status_t releaseScreen() const { return NO_ERROR; };
- virtual status_t initCheck() const = 0;
- };
-
- class DisplayEventThread : public DisplayEventThreadBase
- {
mutable Barrier mBarrier;
+ status_t waitForFbSleep();
+ status_t waitForFbWake();
public:
- DisplayEventThread(const sp<SurfaceFlinger>& flinger);
+ DisplayEventThread(const sp<SurfaceFlinger>& flinger);
virtual ~DisplayEventThread();
+ virtual void onFirstRef();
virtual bool threadLoop();
- virtual status_t readyToRun();
- virtual status_t releaseScreen() const;
- virtual status_t initCheck() const;
+ status_t releaseScreen() const;
+ status_t initCheck() const;
};
- sp<DisplayEventThreadBase> mDisplayEventThread;
- mutable int mScreenAcquired;
+ sp<DisplayEventThread> mDisplayEventThread;
+ mutable int mScreenAcquired;
};
}; // namespace android