7d978483ed
Background: On MDP compositon, MDP keeps reading contents from the pipes even on Idle Screen i.e. even when HWC is not queueing any new buffers to MDP. Above data traffic leads to high power consumption. Implementation: This change introduces a timer in HWC which will timeout if there are no updates in bypass composition path for the period specified via debug.bypass.idletime. Also SurfaceFlinger will be notified to redraw the current frame which will be composed into FB. Conflicts: libhwcomposer/hwcomposer.cpp Change-Id: Ic3a467596068fa553271b5cd8c2831e544e3211d (cherry picked from commit ad1d9a019234ab03dbc79b1ddb73c86e560e3e74) Conflicts: libhwcomposer/hwcomposer.cpp
86 lines
3.1 KiB
C++
Executable File
86 lines
3.1 KiB
C++
Executable File
/*
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* Copyright (c) 2012, Code Aurora Forum. 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 Code Aurora Forum, Inc. 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 "IdleTimer.h"
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TimerHandler IdleTimer::mHandler = NULL;
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int IdleTimer::create(TimerHandler reg_handler, void* user_data) {
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/* store registerd handler */
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mHandler = reg_handler;
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mSAction.sa_flags = SA_SIGINFO;
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mSAction.sa_sigaction = (TimerFP)(&IdleTimer::timer_cb);
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sigemptyset(&mSAction.sa_mask);
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if (sigaction(SIGRTMIN, &mSAction, NULL) == -1) {
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LOGE("%s: IdleTimer::sigaction failed!!", __FUNCTION__);
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return -1;
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}
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/* start the timer */
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mSEvent.sigev_notify = SIGEV_SIGNAL;
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mSEvent.sigev_signo = SIGRTMIN;
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mSEvent.sigev_value.sival_ptr = user_data;
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if (timer_create(CLOCK_REALTIME, &mSEvent, &mID) == -1) {
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LOGE("%s: IdleTimer::timer_create failed!!", __FUNCTION__);
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return -1;
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}
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return 0;
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}
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int IdleTimer::reset() {
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/* clear signal mask */
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sigemptyset(&mSAction.sa_mask);
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if (sigaction(SIGRTMIN, &mSAction, NULL) == -1) {
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LOGE("%s: IdleTimer::sigaction failed!!", __FUNCTION__);
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return -1;
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}
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/* rearm timer */
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if (timer_settime(mID, 0, &mSpec, NULL) == -1) {
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LOGE("%s: IdleTimer::timer_settime failed!!",__FUNCTION__);
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return -1;
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}
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return 0;
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}
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void IdleTimer::setFreq(unsigned long freq_msecs) {
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mSpec.it_value.tv_sec = freq_msecs / 1000;
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mSpec.it_value.tv_nsec = 0;
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mSpec.it_interval.tv_sec = mSpec.it_value.tv_sec;
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mSpec.it_interval.tv_nsec = mSpec.it_value.tv_nsec;
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}
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void IdleTimer::timer_cb(int sig, siginfo_t* si, void* uc) {
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mHandler((void*)si->si_value.sival_ptr);
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signal(sig, SIG_IGN);
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}
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