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109 lines
3.4 KiB
109 lines
3.4 KiB
/* Copyright (c) 2015,2018 The Linux Foundataion. All rights reserved.
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*
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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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*/
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#include <cutils/properties.h>
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#include <dlfcn.h>
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#include <utils/debug.h>
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#include "cpuhint.h"
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#include "hwc_debugger.h"
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#define __CLASS__ "CPUHint"
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namespace sdm {
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DisplayError CPUHint::Init(HWCDebugHandler *debug_handler) {
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char path[PROPERTY_VALUE_MAX];
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if (debug_handler->GetProperty("ro.vendor.extension_library", path) != kErrorNone) {
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DLOGI("Vendor Extension Library not enabled");
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return kErrorNotSupported;
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}
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int pre_enable_window = -1;
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debug_handler->GetProperty(PERF_HINT_WINDOW_PROP, &pre_enable_window);
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if (pre_enable_window <= 0) {
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DLOGI("Invalid CPU Hint Pre-enable Window %d", pre_enable_window);
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return kErrorNotSupported;
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}
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DLOGI("CPU Hint Pre-enable Window %d", pre_enable_window);
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pre_enable_window_ = pre_enable_window;
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if (vendor_ext_lib_.Open(path)) {
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if (!vendor_ext_lib_.Sym("perf_lock_acq", reinterpret_cast<void **>(&fn_lock_acquire_)) ||
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!vendor_ext_lib_.Sym("perf_lock_rel", reinterpret_cast<void **>(&fn_lock_release_))) {
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DLOGW("Failed to load symbols for Vendor Extension Library");
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return kErrorNotSupported;
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}
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DLOGI("Successfully Loaded Vendor Extension Library symbols");
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enabled_ = true;
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} else {
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DLOGW("Failed to open %s : %s", path, vendor_ext_lib_.Error());
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}
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return kErrorNone;
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}
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void CPUHint::Set() {
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if (!enabled_) {
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return;
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}
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if (lock_acquired_) {
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return;
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}
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if (frame_countdown_) {
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--frame_countdown_;
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return;
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}
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int hint = HINT;
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lock_handle_ = fn_lock_acquire_(0 /*handle*/, 0/*duration*/,
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&hint, sizeof(hint) / sizeof(int));
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if (lock_handle_ >= 0) {
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lock_acquired_ = true;
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}
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}
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void CPUHint::Reset() {
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if (!enabled_) {
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return;
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}
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frame_countdown_ = pre_enable_window_;
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if (!lock_acquired_) {
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return;
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}
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fn_lock_release_(lock_handle_);
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lock_acquired_ = false;
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}
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} // namespace sdm
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