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
42 static const char *threadName = "IdleInvalidator";
43 InvalidatorHandler IdleInvalidator::mHandler = NULL;
44 android::sp<IdleInvalidator> IdleInvalidator::sInstance(0);
45
IdleInvalidator()46 IdleInvalidator::IdleInvalidator(): Thread(false), mHwcContext(0),
47 mTimeoutEventFd(-1) {
48 ALOGD_IF(II_DEBUG, "IdleInvalidator::%s", __FUNCTION__);
49 }
50
~IdleInvalidator()51 IdleInvalidator::~IdleInvalidator() {
52 if(mTimeoutEventFd >= 0) {
53 close(mTimeoutEventFd);
54 }
55 }
56
init(InvalidatorHandler reg_handler,void * user_data)57 int 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
setIdleTimeout(const uint32_t & timeout)85 bool 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
threadLoop()114 bool 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
readyToRun()135 int IdleInvalidator::readyToRun() {
136 ALOGD_IF(II_DEBUG, "IdleInvalidator::%s", __FUNCTION__);
137 return 0; /*NO_ERROR*/
138 }
139
onFirstRef()140 void IdleInvalidator::onFirstRef() {
141 ALOGD_IF(II_DEBUG, "IdleInvalidator::%s", __FUNCTION__);
142 }
143
getInstance()144 IdleInvalidator *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