Android 10 Display System源码分析（6）：【DRM/KMS】HWComposer && Gralloc2 分析（Android 10.0 && Kernel 4.15）

（一）、DRM/KMS for Android介绍

（1）、Pre-DRM world

Issues：

（2）、DRM world

Objectives：

（3）、Future

（二）、Android drm_hwcomposer介绍

（1）、Android Hardware Composer 2.0

What is Android’s Hardware Composer?
● Determines the most efficient way to composite buffers with the available
hardware
○ Overlay planes
○ GPU composition
○ Blit/2D engine
● Often device specific and written by the display hardware OEM

Hardware Composer 1.x

Key Differences between 1.x and 2.0

Increases API functions from 12 to 43
● Adds support for HDR, color transform matrix, dataspaces, etc.
● Renames prepare() / set() to validate() / present()
● Replaces speculative fences with non-speculative fences

Hardware Composer 1.x Sync Fences

Hardware Composer 2.0 Sync Fences

（2）、Android drm_hwcomposer

HWC1

HWC2

这里使用的就是HWC2。

（三）、Android drm_hwcomposer Code Overview

分析hwcomposer之前，先来分析gralloc。

（四）、gralloc代码分析


Stack Trace:
  RELADDR           FUNCTION                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      FILE:LINE
  0000000000007bcc  drm_gem_rockchip_alloc+164                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    hardware/rockchip/libgralloc/midgard/gralloc_drm_rockchip.cpp:1768
  00000000000053d0  validate_handle(native_handle const*, gralloc_drm_t*)+344                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     hardware/rockchip/libgralloc/midgard/gralloc_drm.cpp:203
  00000000000051f0  gralloc_drm_handle_register+40                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                hardware/rockchip/libgralloc/midgard/gralloc_drm.cpp:229
  000000000000438c  android::hardware::graphics::mapper::V2_0::passthrough::detail::Gralloc0HalImpl<android::hardware::graphics::mapper::V2_1::hal::MapperHal>::importBuffer(native_handle const*, native_handle**)+52                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            hardware/interfaces/graphics/mapper/2.0/utils/passthrough/include/mapper-passthrough/2.0/Gralloc0Hal.h:83
  0000000000004a2c  android::hardware::graphics::mapper::V2_0::hal::detail::MapperImpl<android::hardware::graphics::mapper::V2_1::IMapper, android::hardware::graphics::mapper::V2_1::hal::MapperHal>::importBuffer(android::hardware::hidl_handle const&, std::__1::function<void (android::hardware::graphics::mapper::V2_0::Error, void*)>)+100                                                                                                                                                                                                                                                                                                                                                                hardware/interfaces/graphics/mapper/2.0/utils/hal/include/mapper-hal/2.0/Mapper.h:65
  0000000000012824  android::hardware::graphics::mapper::V2_1::BsMapper::importBuffer(android::hardware::hidl_handle const&, std::__1::function<void (android::hardware::graphics::mapper::V2_0::Error, void*)>)+164                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              out/soong/.intermediates/hardware/interfaces/graphics/mapper/2.1/android.hardware.graphics.mapper@2.1_genc++_headers/gen/android/hardware/graphics/mapper/2.1/BsMapper.h:85
  000000000001f84c  android::Gralloc2Mapper::importBuffer(android::hardware::hidl_handle const&, native_handle const**) const+220                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 frameworks/native/libs/ui/Gralloc2.cpp:183
  v-------------->  operator()<android::hardware::graphics::mapper::V2_0::Error, unsigned int, android::hardware::hidl_vec<android::hardware::hidl_handle> >                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      frameworks/native/libs/ui/Gralloc2.cpp:453
  v-------------->  _ZNSt3__18__invokeIRZNK7android17Gralloc2Allocator8allocateEjjijmjPjPPK13native_handleE3$_7JNS1_8hardware8graphics6mapper4V2_05ErrorEjRKNSA_8hidl_vecINSA_11hidl_handleEEEEEEDTclclsr3std3__1E7forwardIT_Efp_Espclsr3std3__1E7forwardIT0_Efp0_EEEOSK_DpOSL_                                                                                                                                                                                                                                                                                                                                                                                                                                   external/libcxx/include/type_traits:4353
  v-------------->  void std::__1::__invoke_void_return_wrapper<void>::__call<android::Gralloc2Allocator::allocate(unsigned int, unsigned int, int, unsigned int, unsigned long, unsigned int, unsigned int*, native_handle const**) const::$_7&, android::hardware::graphics::mapper::V2_0::Error, unsigned int, android::hardware::hidl_vec<android::hardware::hidl_handle> const&>(android::Gralloc2Allocator::allocate(unsigned int, unsigned int, int, unsigned int, unsigned long, unsigned int, unsigned int*, native_handle const**) const::$_7&, android::hardware::graphics::mapper::V2_0::Error&&, unsigned int&&, android::hardware::hidl_vec<android::hardware::hidl_handle> const&)                 external/libcxx/include/__functional_base:349
  v-------------->  std::__1::__function::__alloc_func<android::Gralloc2Allocator::allocate(unsigned int, unsigned int, int, unsigned int, unsigned long, unsigned int, unsigned int*, native_handle const**) const::$_7, std::__1::allocator<android::Gralloc2Allocator::allocate(unsigned int, unsigned int, int, unsigned int, unsigned long, unsigned int, unsigned int*, native_handle const**) const::$_7>, void (android::hardware::graphics::mapper::V2_0::Error, unsigned int, android::hardware::hidl_vec<android::hardware::hidl_handle> const&)>::operator()(android::hardware::graphics::mapper::V2_0::Error&&, unsigned int&&, android::hardware::hidl_vec<android::hardware::hidl_handle> const&)  external/libcxx/include/functional:1527
  0000000000020b44  std::__1::__function::__func<android::Gralloc2Allocator::allocate(unsigned int, unsigned int, int, unsigned int, unsigned long, unsigned int, unsigned int*, native_handle const**) const::$_7, std::__1::allocator<android::Gralloc2Allocator::allocate(unsigned int, unsigned int, int, unsigned int, unsigned long, unsigned int, unsigned int*, native_handle const**) const::$_7>, void (android::hardware::graphics::mapper::V2_0::Error, unsigned int, android::hardware::hidl_vec<android::hardware::hidl_handle> const&)>::operator()(android::hardware::graphics::mapper::V2_0::Error&&, unsigned int&&, android::hardware::hidl_vec<android::hardware::hidl_handle> const&)+116    external/libcxx/include/functional:1651
  v-------------->  std::__1::__function::__value_func<void (android::hardware::graphics::mapper::V2_0::Error, unsigned int, android::hardware::hidl_vec<android::hardware::hidl_handle> const&)>::operator()(android::hardware::graphics::mapper::V2_0::Error&&, unsigned int&&, android::hardware::hidl_vec<android::hardware::hidl_handle> const&) const                                                                                                                                                                                                                                                                                                                                                       external/libcxx/include/functional:1799
  v-------------->  std::__1::function<void (android::hardware::graphics::mapper::V2_0::Error, unsigned int, android::hardware::hidl_vec<android::hardware::hidl_handle> const&)>::operator()(android::hardware::graphics::mapper::V2_0::Error, unsigned int, android::hardware::hidl_vec<android::hardware::hidl_handle> const&) const                                                                                                                                                                                                                                                                                                                                                                           external/libcxx/include/functional:2347
  000000000000b9c8  android::hardware::graphics::allocator::V2_0::BpHwAllocator::_hidl_allocate(android::hardware::IInterface*, android::hardware::details::HidlInstrumentor*, android::hardware::hidl_vec<unsigned int> const&, unsigned int, std::__1::function<void (android::hardware::graphics::mapper::V2_0::Error, unsigned int, android::hardware::hidl_vec<android::hardware::hidl_handle> const&)>)+864                                                                                                                                                                                                                                                                                                 out/soong/.intermediates/hardware/interfaces/graphics/allocator/2.0/android.hardware.graphics.allocator@2.0_genc++/gen/android/hardware/graphics/allocator/2.0/AllocatorAll.cpp:295
  000000000000bdac  android::hardware::graphics::allocator::V2_0::BpHwAllocator::allocate(android::hardware::hidl_vec<unsigned int> const&, unsigned int, std::__1::function<void (android::hardware::graphics::mapper::V2_0::Error, unsigned int, android::hardware::hidl_vec<android::hardware::hidl_handle> const&)>)+156                                                                                                                                                                                                                                                                                                                                                                                      out/soong/.intermediates/hardware/interfaces/graphics/allocator/2.0/android.hardware.graphics.allocator@2.0_genc++/gen/android/hardware/graphics/allocator/2.0/AllocatorAll.cpp:326
  00000000000203d4  android::Gralloc2Allocator::allocate(unsigned int, unsigned int, int, unsigned int, unsigned long, unsigned int, unsigned int*, native_handle const**) const+316                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              frameworks/native/libs/ui/Gralloc2.cpp:443
  000000000002436c  android::GraphicBufferAllocator::allocate(unsigned int, unsigned int, int, unsigned int, unsigned long, native_handle const**, unsigned int*, unsigned long, std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >)+284                                                                                                                                                                                                                                                                                                                                                                                                                                       frameworks/native/libs/ui/GraphicBufferAllocator.cpp:134
  00000000000221ac  android::GraphicBuffer::initWithSize(unsigned int, unsigned int, int, unsigned int, unsigned long, std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >)+212                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 frameworks/native/libs/ui/GraphicBuffer.cpp:207
  000000000002208c  android::GraphicBuffer::GraphicBuffer(unsigned int, unsigned int, int, unsigned int, unsigned long, std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >)+124                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                frameworks/native/libs/ui/GraphicBuffer.cpp:92
  0000000000070a8c  android::BufferQueueProducer::dequeueBuffer(int*, android::sp<android::Fence>*, unsigned int, unsigned int, int, unsigned long, unsigned long*, android::FrameEventHistoryDelta*)+1516                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        frameworks/native/libs/gui/BufferQueueProducer.cpp:515
  000000000007ef34  android::BnGraphicBufferProducer::onTransact(unsigned int, android::Parcel const&, android::Parcel*, unsigned int)+1300                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       frameworks/native/libs/gui/IGraphicBufferProducer.cpp:806
  000000000004c6b8  android::BBinder::transact(unsigned int, android::Parcel const&, android::Parcel*, unsigned int)+136                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          frameworks/native/libs/binder/Binder.cpp:134
  0000000000058d08  android::IPCThreadState::executeCommand(int)+984                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              frameworks/native/libs/binder/IPCThreadState.cpp:1213
  000000000005887c  android::IPCThreadState::getAndExecuteCommand()+156                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           frameworks/native/libs/binder/IPCThreadState.cpp:514
  0000000000058fc4  android::IPCThreadState::joinThreadPool(bool)+60                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              frameworks/native/libs/binder/IPCThreadState.cpp:594
  000000000007f578  android::PoolThread::threadLoop()+24                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          frameworks/native/libs/binder/ProcessState.cpp:67
  00000000000137a4  android::Thread::_threadLoop(void*)+284                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       system/core/libutils/Threads.cpp:746
  00000000000e230c  __pthread_start(void*)+36                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     bionic/libc/bionic/pthread_create.cpp:338
  0000000000083d98  __start_thread+64                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             bionic/libc/bionic/clone.cpp:53

//kernel log
[2020/10/21 16:53:43] [ 2136.052329] zjj.rk3399.kernel pid=308, dev=0xe280, auth=0, ROCKCHIP_GEM_CREATE
[2020/10/21 16:53:43] [ 2136.052788] zjj.rk3399.kernel pid=308, dev=0xe280, auth=0, DRM_IOCTL_PRIME_HANDLE_TO_FD
[2020/10/21 16:53:43] [ 2136.052867] zjj.rk3399.kernel drivers/gpu/drm/drm_prime.c drm_gem_prime_handle_to_fd 635 
[2020/10/21 16:53:43] [ 2136.053112] zjj.rk3399.kernel pid=308, dev=0xe280, auth=0, 
ROCKCHIP_GEM_MAP_OFFSET
[2020/10/21 16:53:43] [ 2136.053142] zjj.rk3399.kernel drivers/gpu/drm/rockchip/rockchip_drm_gem.c rockchip_gem_dumb_map_offset 920 
020/10/21 16:53:43] [ 2136.055949] zjj.rk3399.kernel pid=308, dev=0xe280, auth=0, DRM_IOCTL_GEM_CLOSE
[2020/10/21 16:53:44] [ 2136.452341] zjj.rk3399.kernel pid=1221, dev=0xe280, auth=0, DRM_IOCTL_PRIME_FD_TO_HANDLE
[2020/10/21 16:53:44] [ 2136.452400] zjj.rk3399.kernel drivers/gpu/drm/drm_prime.c drm_gem_prime_fd_to_handle 903

（五）、hwcomposer代码分析

hwc_prepare:


Stack Trace:
  RELADDR           FUNCTION                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          FILE:LINE
  0000000000002440  drm_mod_perform(gralloc_module_t const*, int, ...)+120                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            hardware/rockchip/libgralloc/midgard/gralloc.cpp:95
  v-------------->  android::hwc_get_handle_attributes(gralloc_module_t const*, native_handle const*, std::__1::vector<int, std::__1::allocator<int> >*)                                                                                                                                                                                                                                                                                                                                                                                                                                                                              hardware/rockchip/hwcomposer/hwc_rockchip.cpp:824
  00000000000617d0  android::hwc_get_handle_attibute(gralloc_module_t const*, native_handle const*, android::attribute_flag)+80                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       hardware/rockchip/hwcomposer/hwc_rockchip.cpp:850
  0000000000051530  android::hwc_prepare(hwc_composer_device_1*, unsigned long, hwc_display_contents_1**)+3464                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        hardware/rockchip/hwcomposer/hwcomposer.cpp:2733
  00000000000151cc  android::HWC2On1Adapter::prepareAllDisplays()+1156                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                hardware/interfaces/graphics/composer/2.1/utils/hwc2on1adapter/HWC2On1Adapter.cpp:2395
  0000000000014cdc  android::HWC2On1Adapter::Display::validate(unsigned int*, unsigned int*)+92                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       hardware/interfaces/graphics/composer/2.1/utils/hwc2on1adapter/HWC2On1Adapter.cpp:984
  00000000000092f8  android::hardware::graphics::composer::V2_1::passthrough::detail::HwcHalImpl<android::hardware::graphics::composer::V2_1::hal::ComposerHal>::validateDisplay(unsigned long, std::__1::vector<unsigned long, std::__1::allocator<unsigned long> >*, std::__1::vector<android::hardware::graphics::composer::V2_1::IComposerClient::Composition, std::__1::allocator<android::hardware::graphics::composer::V2_1::IComposerClient::Composition> >*, unsigned int*, std::__1::vector<unsigned long, std::__1::allocator<unsigned long> >*, std::__1::vector<unsigned int, std::__1::allocator<unsigned int> >*)+112  hardware/interfaces/graphics/composer/2.1/utils/passthrough/include/composer-passthrough/2.1/HwcHal.h:334
  00000000000111f8  android::hardware::graphics::composer::V2_1::hal::ComposerCommandEngine::executeValidateDisplay(unsigned short)+120                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               hardware/interfaces/graphics/composer/2.1/utils/hal/include/composer-hal/2.1/ComposerCommandEngine.h:259
  0000000000010acc  android::hardware::graphics::composer::V2_1::hal::ComposerCommandEngine::executeCommand(android::hardware::graphics::composer::V2_1::IComposerClient::Command, unsigned short)+1524                                                                                                                                                                                                                                                                                                                                                                                                                               hardware/interfaces/graphics/composer/2.1/utils/hal/include/composer-hal/2.1/ComposerCommandEngine.h:103
  000000000000f168  android::hardware::graphics::composer::V2_1::hal::ComposerCommandEngine::execute(unsigned int, android::hardware::hidl_vec<android::hardware::hidl_handle> const&, bool*, unsigned int*, android::hardware::hidl_vec<android::hardware::hidl_handle>*)+128                                                                                                                                                                                                                                                                                                                                                        hardware/interfaces/graphics/composer/2.1/utils/hal/include/composer-hal/2.1/ComposerCommandEngine.h:64
  000000000000c604  android::hardware::graphics::composer::V2_1::hal::detail::ComposerClientImpl<android::hardware::graphics::composer::V2_1::IComposerClient, android::hardware::graphics::composer::V2_1::hal::ComposerHal>::executeCommands(unsigned int, android::hardware::hidl_vec<android::hardware::hidl_handle> const&, std::__1::function<void (android::hardware::graphics::composer::V2_1::Error, bool, unsigned int, android::hardware::hidl_vec<android::hardware::hidl_handle> const&)>)+116                                                                                                                           hardware/interfaces/graphics/composer/2.1/utils/hal/include/composer-hal/2.1/ComposerClient.h:305
  00000000000388e4  android::hardware::graphics::composer::V2_1::BnHwComposerClient::_hidl_executeCommands(android::hidl::base::V1_0::BnHwBase*, android::hardware::Parcel const&, android::hardware::Parcel*, std::__1::function<void (android::hardware::Parcel&)>)+524                                                                                                                                                                                                                                                                                                                                                             out/soong/.intermediates/hardware/interfaces/graphics/composer/2.1/android.hardware.graphics.composer@2.1_genc++/gen/android/hardware/graphics/composer/2.1/ComposerClientAll.cpp:3710
  0000000000039590  android::hardware::graphics::composer::V2_1::BnHwComposerClient::onTransact(unsigned int, android::hardware::Parcel const&, android::hardware::Parcel*, unsigned int, std::__1::function<void (android::hardware::Parcel&)>)+2672                                                                                                                                                                                                                                                                                                                                                                                 out/soong/.intermediates/hardware/interfaces/graphics/composer/2.1/android.hardware.graphics.composer@2.1_genc++/gen/android/hardware/graphics/composer/2.1/ComposerClientAll.cpp:4058
  0000000000096604  android::hardware::BHwBinder::transact(unsigned int, android::hardware::Parcel const&, android::hardware::Parcel*, unsigned int, std::__1::function<void (android::hardware::Parcel&)>)+68                                                                                                                                                                                                                                                                                                                                                                                                                        system/libhwbinder/Binder.cpp:116
  v-------------->  android::hardware::IPCThreadState::executeCommand(int)                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            system/libhwbinder/IPCThreadState.cpp:1204
  0000000000099fcc  android::hardware::IPCThreadState::getAndExecuteCommand()+1036                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    system/libhwbinder/IPCThreadState.cpp:461
  000000000009b1e0  android::hardware::IPCThreadState::joinThreadPool(bool)+96                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        system/libhwbinder/IPCThreadState.cpp:561
  00000000000a9df0  android::hardware::PoolThread::threadLoop()+24                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    system/libhwbinder/ProcessState.cpp:61
  00000000000137a4  android::Thread::_threadLoop(void*)+284                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           system/core/libutils/Threads.cpp:746
  00000000000e230c  __pthread_start(void*)+36                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         bionic/libc/bionic/pthread_create.cpp:338
  0000000000083d98  __start_thread+64            
  bionic/libc/bionic/clone.cpp:53

hwc_set:

Stack Trace:
  RELADDR           FUNCTION                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 FILE:LINE
  0000000000002440  drm_mod_perform(gralloc_module_t const*, int, ...)+120                                                                                                                                                                                                                                                                                                                                                                                                                                   hardware/rockchip/libgralloc/midgard/gralloc.cpp:95
  v-------------->  android::hwc_get_handle_attributes(gralloc_module_t const*, native_handle const*, std::__1::vector<int, std::__1::allocator<int> >*)                                                                                                                                                                                                                                                                                                                                                     hardware/rockchip/hwcomposer/hwc_rockchip.cpp:824
  00000000000617d0  android::hwc_get_handle_attibute(gralloc_module_t const*, native_handle const*, android::attribute_flag)+80                                                                                                                                                                                                                                                                                                                                                                              hardware/rockchip/hwcomposer/hwc_rockchip.cpp:850
  000000000005a904  android::DrmGenericImporter::ImportBuffer(native_handle const*, hwc_drm_bo*, unsigned int)+92                                                                                                                                                                                                                                                                                                                                                                                            hardware/rockchip/hwcomposer/platformdrmgeneric.cpp:148
  v-------------->  android::DrmHwcBuffer::ImportBuffer(native_handle const*, android::Importer*, unsigned int)                                                                                                                                                                                                                                                                                                                                                                                              hardware/rockchip/hwcomposer/hwcomposer.cpp:730
  v-------------->  android::DrmHwcLayer::ImportBuffer(android::hwc_context_t*, hwc_layer_1*, android::Importer*)                                                                                                                                                                                                                                                                                                                                                                                            hardware/rockchip/hwcomposer/hwcomposer.cpp:1426
  00000000000548b0  android::hwc_set(hwc_composer_device_1*, unsigned long, hwc_display_contents_1**)+3496                                                                                                                                                                                                                                                                                                                                                                                                   hardware/rockchip/hwcomposer/hwcomposer.cpp:3571
  0000000000014240  android::HWC2On1Adapter::setAllDisplays()+456                                                                                                                                                                                                                                                                                                                                                                                                                                            hardware/interfaces/graphics/composer/2.1/utils/hwc2on1adapter/HWC2On1Adapter.cpp:2528
  0000000000013f80  android::HWC2On1Adapter::Display::present(int*)+176                                                                                                                                                                                                                                                                                                                                                                                                                                      hardware/interfaces/graphics/composer/2.1/utils/hwc2on1adapter/HWC2On1Adapter.cpp:792
  000000000000972c  android::hardware::graphics::composer::V2_1::passthrough::detail::HwcHalImpl<android::hardware::graphics::composer::V2_1::hal::ComposerHal>::presentDisplay(unsigned long, int*, std::__1::vector<unsigned long, std::__1::allocator<unsigned long> >*, std::__1::vector<int, std::__1::allocator<int> >*)+68                                                                                                                                                                            hardware/interfaces/graphics/composer/2.1/utils/passthrough/include/composer-passthrough/2.1/HwcHal.h:386
  000000000001172c  android::hardware::graphics::composer::V2_1::hal::ComposerCommandEngine::executePresentDisplay(unsigned short)+100                                                                                                                                                                                                                                                                                                                                                                       hardware/interfaces/graphics/composer/2.1/utils/hal/include/composer-hal/2.1/ComposerCommandEngine.h:335
  00000000000105bc  android::hardware::graphics::composer::V2_1::hal::ComposerCommandEngine::executeCommand(android::hardware::graphics::composer::V2_1::IComposerClient::Command, unsigned short)+228                                                                                                                                                                                                                                                                                                       hardware/interfaces/graphics/composer/2.1/utils/hal/include/composer-hal/2.1/ComposerCommandEngine.h:109
  000000000000f168  android::hardware::graphics::composer::V2_1::hal::ComposerCommandEngine::execute(unsigned int, android::hardware::hidl_vec<android::hardware::hidl_handle> const&, bool*, unsigned int*, android::hardware::hidl_vec<android::hardware::hidl_handle>*)+128                                                                                                                                                                                                                               hardware/interfaces/graphics/composer/2.1/utils/hal/include/composer-hal/2.1/ComposerCommandEngine.h:64
  000000000000c604  android::hardware::graphics::composer::V2_1::hal::detail::ComposerClientImpl<android::hardware::graphics::composer::V2_1::IComposerClient, android::hardware::graphics::composer::V2_1::hal::ComposerHal>::executeCommands(unsigned int, android::hardware::hidl_vec<android::hardware::hidl_handle> const&, std::__1::function<void (android::hardware::graphics::composer::V2_1::Error, bool, unsigned int, android::hardware::hidl_vec<android::hardware::hidl_handle> const&)>)+116  hardware/interfaces/graphics/composer/2.1/utils/hal/include/composer-hal/2.1/ComposerClient.h:305
  00000000000388e4  android::hardware::graphics::composer::V2_1::BnHwComposerClient::_hidl_executeCommands(android::hidl::base::V1_0::BnHwBase*, android::hardware::Parcel const&, android::hardware::Parcel*, std::__1::function<void (android::hardware::Parcel&)>)+524                                                                                                                                                                                                                                    out/soong/.intermediates/hardware/interfaces/graphics/composer/2.1/android.hardware.graphics.composer@2.1_genc++/gen/android/hardware/graphics/composer/2.1/ComposerClientAll.cpp:3710
  0000000000039590  android::hardware::graphics::composer::V2_1::BnHwComposerClient::onTransact(unsigned int, android::hardware::Parcel const&, android::hardware::Parcel*, unsigned int, std::__1::function<void (android::hardware::Parcel&)>)+2672                                                                                                                                                                                                                                                        out/soong/.intermediates/hardware/interfaces/graphics/composer/2.1/android.hardware.graphics.composer@2.1_genc++/gen/android/hardware/graphics/composer/2.1/ComposerClientAll.cpp:4058
  0000000000096604  android::hardware::BHwBinder::transact(unsigned int, android::hardware::Parcel const&, android::hardware::Parcel*, unsigned int, std::__1::function<void (android::hardware::Parcel&)>)+68                                                                                                                                                                                                                                                                                               system/libhwbinder/Binder.cpp:116
  v-------------->  android::hardware::IPCThreadState::executeCommand(int)                                                                                                                                                                                                                                                                                                                                                                                                                                   system/libhwbinder/IPCThreadState.cpp:1204
  0000000000099fcc  android::hardware::IPCThreadState::getAndExecuteCommand()+1036                                                                                                                                                                                                                                                                                                                                                                                                                           system/libhwbinder/IPCThreadState.cpp:461
  000000000009b1e0  android::hardware::IPCThreadState::joinThreadPool(bool)+96                                                                                                                                                                                                                                                                                                                                                                                                                               system/libhwbinder/IPCThreadState.cpp:561
  00000000000a9df0  android::hardware::PoolThread::threadLoop()+24                                                                                                                                                                                                                                                                                                                                                                                                                                           system/libhwbinder/ProcessState.cpp:61
  00000000000137a4  android::Thread::_threadLoop(void*)+284                                                                                                                                                                                                                                                                                                                                                                                                                                                  system/core/libutils/Threads.cpp:746
  00000000000e230c  __pthread_start(void*)+36                                                                                                                                                                                                                                                                                                                                                                                                                                                                bionic/libc/bionic/pthread_create.cpp:338
  0000000000083d98  __start_thread+64                                                                                                                                                                                                                                                                                                                                                                                                                                                                        bionic/libc/bionic/clone.cpp:53