1 /* 2 * Copyright (c) 2016-2017, 2019 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 #ifndef __HWC_CALLBACKS_H__ 31 #define __HWC_CALLBACKS_H__ 32 33 #define HWC2_INCLUDE_STRINGIFICATION 34 #define HWC2_USE_CPP11 35 #include <hardware/hwcomposer2.h> 36 #undef HWC2_INCLUDE_STRINGIFICATION 37 #undef HWC2_USE_CPP11 38 39 namespace sdm { 40 41 class HWCCallbacks { 42 public: 43 static const int kNumBuiltIn = 4; 44 static const int kNumPluggable = 4; 45 static const int kNumVirtual = 4; 46 // Add 1 primary display which can be either a builtin or pluggable. 47 static const int kNumDisplays = 1 + kNumBuiltIn + kNumPluggable + kNumVirtual; 48 49 HWC2::Error Hotplug(hwc2_display_t display, HWC2::Connection state); 50 HWC2::Error Refresh(hwc2_display_t display); 51 HWC2::Error Vsync(hwc2_display_t display, int64_t timestamp); 52 HWC2::Error Register(HWC2::Callback, hwc2_callback_data_t callback_data, 53 hwc2_function_pointer_t pointer); UpdateVsyncSource(hwc2_display_t from)54 void UpdateVsyncSource(hwc2_display_t from) { 55 vsync_source_ = from; 56 } GetVsyncSource()57 hwc2_display_t GetVsyncSource() { return vsync_source_; } 58 VsyncCallbackRegistered()59 bool VsyncCallbackRegistered() { return (vsync_ != nullptr && vsync_data_ != nullptr); } NeedsRefresh(hwc2_display_t display)60 bool NeedsRefresh(hwc2_display_t display) { return pending_refresh_.test(UINT32(display)); } ResetRefresh(hwc2_display_t display)61 void ResetRefresh(hwc2_display_t display) { pending_refresh_.reset(UINT32(display)); } 62 63 private: 64 hwc2_callback_data_t hotplug_data_ = nullptr; 65 hwc2_callback_data_t refresh_data_ = nullptr; 66 hwc2_callback_data_t vsync_data_ = nullptr; 67 68 HWC2_PFN_HOTPLUG hotplug_ = nullptr; 69 HWC2_PFN_REFRESH refresh_ = nullptr; 70 HWC2_PFN_VSYNC vsync_ = nullptr; 71 hwc2_display_t vsync_source_ = HWC_DISPLAY_PRIMARY; // hw vsync is active on this display 72 std::bitset<kNumDisplays> pending_refresh_; // Displays waiting to get refreshed 73 }; 74 75 } // namespace sdm 76 77 #endif // __HWC_CALLBACKS_H__ 78