9daa5c9b9d
add support for screen on animation Change-Id: If50cf52ae04b95b42da7d74cf7fa96d5cb54d238
409 lines
12 KiB
C++
409 lines
12 KiB
C++
/*
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* Copyright (C) 2007 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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#include <assert.h>
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#include <errno.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include <unistd.h>
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#include <fcntl.h>
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#include <signal.h>
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#include <termios.h>
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#include <sys/ioctl.h>
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#include <sys/mman.h>
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#include <sys/time.h>
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#include <sys/types.h>
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#include <sys/resource.h>
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#include <linux/unistd.h>
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#include <utils/Log.h>
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#include "DisplayHardware/DisplayHardwareBase.h"
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#include "SurfaceFlinger.h"
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// ----------------------------------------------------------------------------
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// the sim build doesn't have gettid
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#ifndef HAVE_GETTID
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# define gettid getpid
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#endif
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// ----------------------------------------------------------------------------
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namespace android {
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static char const * kSleepFileName = "/sys/power/wait_for_fb_sleep";
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static char const * kWakeFileName = "/sys/power/wait_for_fb_wake";
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static char const * const kOldSleepFileName = "/sys/android_power/wait_for_fb_sleep";
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static char const * const kOldWakeFileName = "/sys/android_power/wait_for_fb_wake";
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// This dir exists if the framebuffer console is present, either built into
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// the kernel or loaded as a module.
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static char const * const kFbconSysDir = "/sys/class/graphics/fbcon";
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// ----------------------------------------------------------------------------
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DisplayHardwareBase::DisplayEventThreadBase::DisplayEventThreadBase(
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const sp<SurfaceFlinger>& flinger)
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: Thread(false), mFlinger(flinger) {
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}
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DisplayHardwareBase::DisplayEventThreadBase::~DisplayEventThreadBase() {
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}
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// ----------------------------------------------------------------------------
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DisplayHardwareBase::DisplayEventThread::DisplayEventThread(
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const sp<SurfaceFlinger>& flinger)
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: DisplayEventThreadBase(flinger)
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{
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}
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DisplayHardwareBase::DisplayEventThread::~DisplayEventThread()
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{
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}
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bool DisplayHardwareBase::DisplayEventThread::threadLoop()
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{
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int err = 0;
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char buf;
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int fd;
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fd = open(kSleepFileName, O_RDONLY, 0);
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do {
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err = read(fd, &buf, 1);
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} while (err < 0 && errno == EINTR);
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close(fd);
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LOGW_IF(err<0, "ANDROID_WAIT_FOR_FB_SLEEP failed (%s)", strerror(errno));
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if (err >= 0) {
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sp<SurfaceFlinger> flinger = mFlinger.promote();
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LOGD("About to give-up screen, flinger = %p", flinger.get());
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if (flinger != 0) {
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mBarrier.close();
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flinger->screenReleased(0);
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mBarrier.wait();
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}
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}
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fd = open(kWakeFileName, O_RDONLY, 0);
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do {
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err = read(fd, &buf, 1);
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} while (err < 0 && errno == EINTR);
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close(fd);
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LOGW_IF(err<0, "ANDROID_WAIT_FOR_FB_WAKE failed (%s)", strerror(errno));
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if (err >= 0) {
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sp<SurfaceFlinger> flinger = mFlinger.promote();
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LOGD("Screen about to return, flinger = %p", flinger.get());
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if (flinger != 0)
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flinger->screenAcquired(0);
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}
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return true;
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}
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status_t DisplayHardwareBase::DisplayEventThread::releaseScreen() const
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{
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mBarrier.open();
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return NO_ERROR;
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}
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status_t DisplayHardwareBase::DisplayEventThread::readyToRun()
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{
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if (access(kSleepFileName, R_OK) || access(kWakeFileName, R_OK)) {
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if (access(kOldSleepFileName, R_OK) || access(kOldWakeFileName, R_OK)) {
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LOGE("Couldn't open %s or %s", kSleepFileName, kWakeFileName);
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return NO_INIT;
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}
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kSleepFileName = kOldSleepFileName;
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kWakeFileName = kOldWakeFileName;
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}
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return NO_ERROR;
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}
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status_t DisplayHardwareBase::DisplayEventThread::initCheck() const
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{
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return (((access(kSleepFileName, R_OK) == 0 &&
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access(kWakeFileName, R_OK) == 0) ||
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(access(kOldSleepFileName, R_OK) == 0 &&
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access(kOldWakeFileName, R_OK) == 0)) &&
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access(kFbconSysDir, F_OK) != 0) ? NO_ERROR : NO_INIT;
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}
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// ----------------------------------------------------------------------------
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pid_t DisplayHardwareBase::ConsoleManagerThread::sSignalCatcherPid = 0;
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DisplayHardwareBase::ConsoleManagerThread::ConsoleManagerThread(
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const sp<SurfaceFlinger>& flinger)
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: DisplayEventThreadBase(flinger), consoleFd(-1)
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{
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sSignalCatcherPid = 0;
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// create a new console
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char const * const ttydev = "/dev/tty0";
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int fd = open(ttydev, O_RDWR | O_SYNC);
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if (fd<0) {
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LOGE("Can't open %s", ttydev);
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this->consoleFd = -errno;
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return;
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}
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// to make sure that we are in text mode
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int res = ioctl(fd, KDSETMODE, (void*) KD_TEXT);
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if (res<0) {
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LOGE("ioctl(%d, KDSETMODE, ...) failed, res %d (%s)",
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fd, res, strerror(errno));
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}
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// get the current console
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struct vt_stat vs;
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res = ioctl(fd, VT_GETSTATE, &vs);
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if (res<0) {
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LOGE("ioctl(%d, VT_GETSTATE, ...) failed, res %d (%s)",
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fd, res, strerror(errno));
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this->consoleFd = -errno;
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return;
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}
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// switch to console 7 (which is what X normaly uses)
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int vtnum = 7;
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do {
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res = ioctl(fd, VT_ACTIVATE, (void*)vtnum);
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} while(res < 0 && errno == EINTR);
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if (res<0) {
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LOGE("ioctl(%d, VT_ACTIVATE, ...) failed, %d (%s) for %d",
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fd, errno, strerror(errno), vtnum);
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this->consoleFd = -errno;
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return;
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}
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do {
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res = ioctl(fd, VT_WAITACTIVE, (void*)vtnum);
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} while(res < 0 && errno == EINTR);
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if (res<0) {
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LOGE("ioctl(%d, VT_WAITACTIVE, ...) failed, %d %d %s for %d",
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fd, res, errno, strerror(errno), vtnum);
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this->consoleFd = -errno;
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return;
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}
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// open the new console
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close(fd);
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fd = open(ttydev, O_RDWR | O_SYNC);
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if (fd<0) {
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LOGE("Can't open new console %s", ttydev);
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this->consoleFd = -errno;
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return;
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}
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/* disable console line buffer, echo, ... */
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struct termios ttyarg;
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ioctl(fd, TCGETS , &ttyarg);
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ttyarg.c_iflag = 0;
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ttyarg.c_lflag = 0;
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ioctl(fd, TCSETS , &ttyarg);
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// set up signals so we're notified when the console changes
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// we can't use SIGUSR1 because it's used by the java-vm
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vm.mode = VT_PROCESS;
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vm.waitv = 0;
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vm.relsig = SIGUSR2;
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vm.acqsig = SIGUNUSED;
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vm.frsig = 0;
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struct sigaction act;
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sigemptyset(&act.sa_mask);
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act.sa_handler = sigHandler;
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act.sa_flags = 0;
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sigaction(vm.relsig, &act, NULL);
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sigemptyset(&act.sa_mask);
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act.sa_handler = sigHandler;
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act.sa_flags = 0;
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sigaction(vm.acqsig, &act, NULL);
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sigset_t mask;
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sigemptyset(&mask);
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sigaddset(&mask, vm.relsig);
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sigaddset(&mask, vm.acqsig);
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sigprocmask(SIG_BLOCK, &mask, NULL);
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// switch to graphic mode
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res = ioctl(fd, KDSETMODE, (void*)KD_GRAPHICS);
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LOGW_IF(res<0,
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"ioctl(%d, KDSETMODE, KD_GRAPHICS) failed, res %d", fd, res);
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this->prev_vt_num = vs.v_active;
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this->vt_num = vtnum;
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this->consoleFd = fd;
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}
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DisplayHardwareBase::ConsoleManagerThread::~ConsoleManagerThread()
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{
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if (this->consoleFd >= 0) {
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int fd = this->consoleFd;
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int prev_vt_num = this->prev_vt_num;
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int res;
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ioctl(fd, KDSETMODE, (void*)KD_TEXT);
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do {
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res = ioctl(fd, VT_ACTIVATE, (void*)prev_vt_num);
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} while(res < 0 && errno == EINTR);
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do {
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res = ioctl(fd, VT_WAITACTIVE, (void*)prev_vt_num);
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} while(res < 0 && errno == EINTR);
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close(fd);
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char const * const ttydev = "/dev/tty0";
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fd = open(ttydev, O_RDWR | O_SYNC);
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ioctl(fd, VT_DISALLOCATE, 0);
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close(fd);
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}
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}
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status_t DisplayHardwareBase::ConsoleManagerThread::readyToRun()
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{
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if (this->consoleFd >= 0) {
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sSignalCatcherPid = gettid();
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sigset_t mask;
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sigemptyset(&mask);
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sigaddset(&mask, vm.relsig);
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sigaddset(&mask, vm.acqsig);
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sigprocmask(SIG_BLOCK, &mask, NULL);
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int res = ioctl(this->consoleFd, VT_SETMODE, &vm);
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if (res<0) {
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LOGE("ioctl(%d, VT_SETMODE, ...) failed, %d (%s)",
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this->consoleFd, errno, strerror(errno));
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}
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return NO_ERROR;
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}
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return this->consoleFd;
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}
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void DisplayHardwareBase::ConsoleManagerThread::requestExit()
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{
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Thread::requestExit();
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if (sSignalCatcherPid != 0) {
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// wake the thread up
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kill(sSignalCatcherPid, SIGINT);
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// wait for it...
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}
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}
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void DisplayHardwareBase::ConsoleManagerThread::sigHandler(int sig)
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{
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// resend the signal to our signal catcher thread
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LOGW("received signal %d in thread %d, resending to %d",
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sig, gettid(), sSignalCatcherPid);
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// we absolutely need the delays below because without them
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// our main thread never gets a chance to handle the signal.
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usleep(10000);
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kill(sSignalCatcherPid, sig);
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usleep(10000);
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}
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status_t DisplayHardwareBase::ConsoleManagerThread::releaseScreen() const
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{
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int fd = this->consoleFd;
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int err = ioctl(fd, VT_RELDISP, (void*)1);
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LOGE_IF(err<0, "ioctl(%d, VT_RELDISP, 1) failed %d (%s)",
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fd, errno, strerror(errno));
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return (err<0) ? (-errno) : status_t(NO_ERROR);
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}
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bool DisplayHardwareBase::ConsoleManagerThread::threadLoop()
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{
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sigset_t mask;
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sigemptyset(&mask);
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sigaddset(&mask, vm.relsig);
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sigaddset(&mask, vm.acqsig);
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int sig = 0;
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sigwait(&mask, &sig);
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if (sig == vm.relsig) {
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sp<SurfaceFlinger> flinger = mFlinger.promote();
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//LOGD("About to give-up screen, flinger = %p", flinger.get());
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if (flinger != 0)
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flinger->screenReleased(0);
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} else if (sig == vm.acqsig) {
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sp<SurfaceFlinger> flinger = mFlinger.promote();
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//LOGD("Screen about to return, flinger = %p", flinger.get());
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if (flinger != 0)
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flinger->screenAcquired(0);
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}
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return true;
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}
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status_t DisplayHardwareBase::ConsoleManagerThread::initCheck() const
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{
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return consoleFd >= 0 ? NO_ERROR : NO_INIT;
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}
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// ----------------------------------------------------------------------------
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DisplayHardwareBase::DisplayHardwareBase(const sp<SurfaceFlinger>& flinger,
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uint32_t displayIndex)
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: mCanDraw(true), mScreenAcquired(true)
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{
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mDisplayEventThread = new DisplayEventThread(flinger);
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if (mDisplayEventThread->initCheck() != NO_ERROR) {
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// fall-back on the console
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mDisplayEventThread = new ConsoleManagerThread(flinger);
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}
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}
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DisplayHardwareBase::~DisplayHardwareBase()
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{
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// request exit
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mDisplayEventThread->requestExitAndWait();
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}
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void DisplayHardwareBase::setCanDraw(bool canDraw)
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{
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mCanDraw = canDraw;
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}
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bool DisplayHardwareBase::canDraw() const
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{
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return mCanDraw && mScreenAcquired;
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}
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void DisplayHardwareBase::releaseScreen() const
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{
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status_t err = mDisplayEventThread->releaseScreen();
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if (err >= 0) {
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mScreenAcquired = false;
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}
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}
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void DisplayHardwareBase::acquireScreen() const
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{
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status_t err = mDisplayEventThread->acquireScreen();
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if (err >= 0) {
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mScreenAcquired = true;
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}
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}
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bool DisplayHardwareBase::isScreenAcquired() const
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{
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return mScreenAcquired;
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}
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}; // namespace android
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