1/*
2 * Copyright (c) 2012, The Linux Foundation. All rights reserved.
3
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions are
6 * met:
7 *   * Redistributions of source code must retain the above copyright
8 *     notice, this list of conditions and the following disclaimer.
9 *   * Redistributions in binary form must reproduce the above
10 *     copyright notice, this list of conditions and the following
11 *     disclaimer in the documentation and/or other materials provided
12 *     with the distribution.
13 *   * Neither the name of The Linux Foundation nor the names of its
14 *     contributors may be used to endorse or promote products derived
15 *     from this software without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
18 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
19 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
20 * ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
21 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
22 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
23 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
24 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
25 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
26 * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
27 * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 */
29
30#include "idle_invalidator.h"
31#include <unistd.h>
32#include <poll.h>
33#include <string.h>
34#include <fcntl.h>
35#include <cutils/properties.h>
36
37#define II_DEBUG 0
38#define IDLE_NOTIFY_PATH "/sys/devices/virtual/graphics/fb0/idle_notify"
39#define IDLE_TIME_PATH "/sys/devices/virtual/graphics/fb0/idle_time"
40
41
42static const char *threadName = "IdleInvalidator";
43InvalidatorHandler IdleInvalidator::mHandler = NULL;
44android::sp<IdleInvalidator> IdleInvalidator::sInstance(0);
45
46IdleInvalidator::IdleInvalidator(): Thread(false), mHwcContext(0),
47    mTimeoutEventFd(-1) {
48    ALOGD_IF(II_DEBUG, "IdleInvalidator::%s", __FUNCTION__);
49}
50
51IdleInvalidator::~IdleInvalidator() {
52    if(mTimeoutEventFd >= 0) {
53        close(mTimeoutEventFd);
54    }
55}
56
57int IdleInvalidator::init(InvalidatorHandler reg_handler, void* user_data) {
58    mHandler = reg_handler;
59    mHwcContext = user_data;
60
61    // Open a sysfs node to receive the timeout notification from driver.
62    mTimeoutEventFd = open(IDLE_NOTIFY_PATH, O_RDONLY);
63    if (mTimeoutEventFd < 0) {
64        ALOGE ("%s:not able to open %s node %s",
65                __FUNCTION__, IDLE_NOTIFY_PATH, strerror(errno));
66        return -1;
67    }
68
69    int defaultIdleTime = 70; //ms
70    char property[PROPERTY_VALUE_MAX] = {0};
71    if((property_get("debug.mdpcomp.idletime", property, NULL) > 0)) {
72        defaultIdleTime = atoi(property);
73    }
74    if(not setIdleTimeout(defaultIdleTime)) {
75        close(mTimeoutEventFd);
76        mTimeoutEventFd = -1;
77        return -1;
78    }
79
80    //Triggers the threadLoop to run, if not already running.
81    run(threadName, android::PRIORITY_LOWEST);
82    return 0;
83}
84
85bool IdleInvalidator::setIdleTimeout(const uint32_t& timeout) {
86    ALOGD_IF(II_DEBUG, "IdleInvalidator::%s timeout %d",
87            __FUNCTION__, timeout);
88
89    // Open a sysfs node to send the timeout value to driver.
90    int fd = open(IDLE_TIME_PATH, O_WRONLY);
91
92    if (fd < 0) {
93        ALOGE ("%s:Unable to open %s node %s",
94                __FUNCTION__, IDLE_TIME_PATH, strerror(errno));
95        return false;
96    }
97
98    char strSleepTime[64];
99    snprintf(strSleepTime, sizeof(strSleepTime), "%d", timeout);
100
101    // Notify driver about the timeout value
102    ssize_t len = pwrite(fd, strSleepTime, strlen(strSleepTime), 0);
103    if(len < -1) {
104        ALOGE ("%s:Unable to write into %s node %s",
105                __FUNCTION__, IDLE_TIME_PATH, strerror(errno));
106        close(fd);
107        return false;
108    }
109
110    close(fd);
111    return true;
112}
113
114bool IdleInvalidator::threadLoop() {
115    ALOGD_IF(II_DEBUG, "IdleInvalidator::%s", __FUNCTION__);
116    struct pollfd pFd;
117    pFd.fd = mTimeoutEventFd;
118    if (pFd.fd >= 0)
119        pFd.events = POLLPRI | POLLERR;
120    // Poll for an timeout event from driver
121    int err = poll(&pFd, 1, -1);
122    if(err > 0) {
123        if (pFd.revents & POLLPRI) {
124            char data[64];
125            // Consume the node by reading it
126            ssize_t len = pread(pFd.fd, data, 64, 0);
127            ALOGD_IF(II_DEBUG, "IdleInvalidator::%s Idle Timeout fired len %zd",
128                __FUNCTION__, len);
129            mHandler((void*)mHwcContext);
130        }
131    }
132    return true;
133}
134
135int IdleInvalidator::readyToRun() {
136    ALOGD_IF(II_DEBUG, "IdleInvalidator::%s", __FUNCTION__);
137    return 0; /*NO_ERROR*/
138}
139
140void IdleInvalidator::onFirstRef() {
141    ALOGD_IF(II_DEBUG, "IdleInvalidator::%s", __FUNCTION__);
142}
143
144IdleInvalidator *IdleInvalidator::getInstance() {
145    ALOGD_IF(II_DEBUG, "IdleInvalidator::%s", __FUNCTION__);
146    if(sInstance.get() == NULL)
147        sInstance = new IdleInvalidator();
148    return sInstance.get();
149}
150