1 #include <dvr/vr_flinger.h>
2
3 #include <errno.h>
4 #include <fcntl.h>
5 #include <poll.h>
6 #include <signal.h>
7 #include <string.h>
8 #include <time.h>
9 #include <unistd.h>
10 #include <memory>
11
12 #include <binder/IServiceManager.h>
13 #include <binder/ProcessState.h>
14 #include <cutils/properties.h>
15 #include <cutils/sched_policy.h>
16 #include <log/log.h>
17 #include <private/dvr/display_client.h>
18 #include <sys/prctl.h>
19 #include <sys/resource.h>
20
21 #include <functional>
22
23 #include "DisplayHardware/ComposerHal.h"
24 #include "display_manager_service.h"
25 #include "display_service.h"
26 #include "vsync_service.h"
27
28 namespace android {
29 namespace dvr {
30
Create(Hwc2::Composer * hidl,hwc2_display_t primary_display_id,RequestDisplayCallback request_display_callback)31 std::unique_ptr<VrFlinger> VrFlinger::Create(
32 Hwc2::Composer* hidl, hwc2_display_t primary_display_id,
33 RequestDisplayCallback request_display_callback) {
34 std::unique_ptr<VrFlinger> vr_flinger(new VrFlinger);
35 if (vr_flinger->Init(hidl, primary_display_id, request_display_callback))
36 return vr_flinger;
37 else
38 return nullptr;
39 }
40
VrFlinger()41 VrFlinger::VrFlinger() {}
42
~VrFlinger()43 VrFlinger::~VrFlinger() {
44 if (persistent_vr_state_callback_.get()) {
45 sp<IVrManager> vr_manager = interface_cast<IVrManager>(
46 defaultServiceManager()->checkService(String16("vrmanager")));
47 if (vr_manager.get()) {
48 vr_manager->unregisterPersistentVrStateListener(
49 persistent_vr_state_callback_);
50 }
51 }
52
53 if (dispatcher_)
54 dispatcher_->SetCanceled(true);
55 if (dispatcher_thread_.joinable())
56 dispatcher_thread_.join();
57 }
58
Init(Hwc2::Composer * hidl,hwc2_display_t primary_display_id,RequestDisplayCallback request_display_callback)59 bool VrFlinger::Init(Hwc2::Composer* hidl,
60 hwc2_display_t primary_display_id,
61 RequestDisplayCallback request_display_callback) {
62 if (!hidl || !request_display_callback)
63 return false;
64
65 std::shared_ptr<android::pdx::Service> service;
66
67 ALOGI("Starting up VrFlinger...");
68
69 // We need to be able to create endpoints with full perms.
70 umask(0000);
71
72 android::ProcessState::self()->startThreadPool();
73
74 request_display_callback_ = request_display_callback;
75
76 dispatcher_ = android::pdx::ServiceDispatcher::Create();
77 CHECK_ERROR(!dispatcher_, error, "Failed to create service dispatcher.");
78
79 display_service_ = android::dvr::DisplayService::Create(
80 hidl, primary_display_id, request_display_callback);
81 CHECK_ERROR(!display_service_, error, "Failed to create display service.");
82 dispatcher_->AddService(display_service_);
83
84 service = android::dvr::DisplayManagerService::Create(display_service_);
85 CHECK_ERROR(!service, error, "Failed to create display manager service.");
86 dispatcher_->AddService(service);
87
88 service = android::dvr::VSyncService::Create();
89 CHECK_ERROR(!service, error, "Failed to create vsync service.");
90 dispatcher_->AddService(service);
91
92 display_service_->SetVSyncCallback(
93 std::bind(&android::dvr::VSyncService::VSyncEvent,
94 std::static_pointer_cast<android::dvr::VSyncService>(service),
95 std::placeholders::_1, std::placeholders::_2,
96 std::placeholders::_3));
97
98 dispatcher_thread_ = std::thread([this]() {
99 prctl(PR_SET_NAME, reinterpret_cast<unsigned long>("VrDispatch"), 0, 0, 0);
100 ALOGI("Entering message loop.");
101
102 setpriority(PRIO_PROCESS, 0, android::PRIORITY_URGENT_DISPLAY);
103 set_sched_policy(0, SP_FOREGROUND);
104
105 int ret = dispatcher_->EnterDispatchLoop();
106 if (ret < 0) {
107 ALOGE("Dispatch loop exited because: %s\n", strerror(-ret));
108 }
109 });
110
111 return true;
112
113 error:
114 return false;
115 }
116
OnBootFinished()117 void VrFlinger::OnBootFinished() {
118 display_service_->OnBootFinished();
119 sp<IVrManager> vr_manager = interface_cast<IVrManager>(
120 defaultServiceManager()->checkService(String16("vrmanager")));
121 if (vr_manager.get()) {
122 persistent_vr_state_callback_ =
123 new PersistentVrStateCallback(request_display_callback_);
124 vr_manager->registerPersistentVrStateListener(
125 persistent_vr_state_callback_);
126 } else {
127 ALOGE("Unable to register vr flinger for persistent vr mode changes");
128 }
129 }
130
GrantDisplayOwnership()131 void VrFlinger::GrantDisplayOwnership() {
132 display_service_->GrantDisplayOwnership();
133 }
134
SeizeDisplayOwnership()135 void VrFlinger::SeizeDisplayOwnership() {
136 display_service_->SeizeDisplayOwnership();
137 }
138
Dump()139 std::string VrFlinger::Dump() {
140 // TODO(karthikrs): Add more state information here.
141 return display_service_->DumpState(0/*unused*/);
142 }
143
onPersistentVrStateChanged(bool enabled)144 void VrFlinger::PersistentVrStateCallback::onPersistentVrStateChanged(
145 bool enabled) {
146 ALOGV("Notified persistent vr mode is %s", enabled ? "on" : "off");
147 // TODO(eieio): Determine the correct signal to request display control.
148 // Persistent VR mode is not enough.
149 // request_display_callback_(enabled);
150 }
151 } // namespace dvr
152 } // namespace android
153