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108 lines
3.4 KiB
108 lines
3.4 KiB
/* Copyright (c) 2015, 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("sdm.perf_hint_window", &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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