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129 lines
4.7 KiB
129 lines
4.7 KiB
/*
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* Copyright (c) 2012, The Linux Foundation. All rights reserved.
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met:
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials provided
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* with the distribution.
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* * Neither the name of The Linux Foundation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
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* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
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* OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
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* IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "idle_invalidator.h"
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#include <unistd.h>
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#include <poll.h>
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#include <string.h>
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#include <fcntl.h>
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#define II_DEBUG 0
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#define IDLE_NOTIFY_PATH "/sys/devices/virtual/graphics/fb0/idle_notify"
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#define IDLE_TIME_PATH "/sys/devices/virtual/graphics/fb0/idle_time"
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static const char *threadName = "IdleInvalidator";
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InvalidatorHandler IdleInvalidator::mHandler = NULL;
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android::sp<IdleInvalidator> IdleInvalidator::sInstance(0);
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IdleInvalidator::IdleInvalidator(): Thread(false), mHwcContext(0),
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mTimeoutEventFd(-1) {
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ALOGD_IF(II_DEBUG, "IdleInvalidator::%s", __FUNCTION__);
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}
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int IdleInvalidator::init(InvalidatorHandler reg_handler, void* user_data,
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unsigned int idleSleepTime) {
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ALOGD_IF(II_DEBUG, "IdleInvalidator::%s idleSleepTime %d",
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__FUNCTION__, idleSleepTime);
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mHandler = reg_handler;
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mHwcContext = user_data;
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// Open a sysfs node to receive the timeout notification from driver.
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mTimeoutEventFd = open(IDLE_NOTIFY_PATH, O_RDONLY);
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if (mTimeoutEventFd < 0) {
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ALOGE ("%s:not able to open %s node %s",
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__FUNCTION__, IDLE_NOTIFY_PATH, strerror(errno));
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return -1;
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}
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// Open a sysfs node to send the timeout value to driver.
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int fd = open(IDLE_TIME_PATH, O_WRONLY);
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if (fd < 0) {
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ALOGE ("%s:not able to open %s node %s",
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__FUNCTION__, IDLE_TIME_PATH, strerror(errno));
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close(mTimeoutEventFd);
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mTimeoutEventFd = -1;
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return -1;
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}
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char strSleepTime[64];
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snprintf(strSleepTime, sizeof(strSleepTime), "%d", idleSleepTime);
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// Notify driver about the timeout value
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ssize_t len = pwrite(fd, strSleepTime, strlen(strSleepTime), 0);
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if(len < -1) {
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ALOGE ("%s:not able to write into %s node %s",
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__FUNCTION__, IDLE_TIME_PATH, strerror(errno));
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close(mTimeoutEventFd);
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mTimeoutEventFd = -1;
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close(fd);
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return -1;
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}
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close(fd);
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//Triggers the threadLoop to run, if not already running.
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run(threadName, android::PRIORITY_LOWEST);
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return 0;
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}
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bool IdleInvalidator::threadLoop() {
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ALOGD_IF(II_DEBUG, "IdleInvalidator::%s", __FUNCTION__);
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struct pollfd pFd;
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pFd.fd = mTimeoutEventFd;
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if (pFd.fd >= 0)
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pFd.events = POLLPRI | POLLERR;
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// Poll for an timeout event from driver
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int err = poll(&pFd, 1, -1);
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if(err > 0) {
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if (pFd.revents & POLLPRI) {
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char data[64];
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// Consume the node by reading it
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ssize_t len = pread(pFd.fd, data, 64, 0);
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ALOGD_IF(II_DEBUG, "IdleInvalidator::%s Idle Timeout fired len %zd",
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__FUNCTION__, len);
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mHandler((void*)mHwcContext);
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}
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}
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return true;
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}
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int IdleInvalidator::readyToRun() {
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ALOGD_IF(II_DEBUG, "IdleInvalidator::%s", __FUNCTION__);
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return 0; /*NO_ERROR*/
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}
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void IdleInvalidator::onFirstRef() {
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ALOGD_IF(II_DEBUG, "IdleInvalidator::%s", __FUNCTION__);
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}
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IdleInvalidator *IdleInvalidator::getInstance() {
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ALOGD_IF(II_DEBUG, "IdleInvalidator::%s", __FUNCTION__);
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if(sInstance.get() == NULL)
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sInstance = new IdleInvalidator();
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return sInstance.get();
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}
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