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1 /*
2  * Copyright (c) 2014-2017, The Linux Foundation. All rights reserved.
3  * Not a Contribution.
4  *
5  * Copyright 2015 The Android Open Source Project
6  *
7  * Licensed under the Apache License, Version 2.0 (the "License");
8  * you may not use this file except in compliance with the License.
9  * You may obtain a copy of the License at
10  *
11  *      http://www.apache.org/licenses/LICENSE-2.0
12  *
13  * Unless required by applicable law or agreed to in writing, software
14  * distributed under the License is distributed on an "AS IS" BASIS,
15  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
16  * See the License for the specific language governing permissions and
17  * limitations under the License.
18  */
19 
20 #ifndef __HWC_SESSION_H__
21 #define __HWC_SESSION_H__
22 
23 #include <core/core_interface.h>
24 #include <utils/locker.h>
25 
26 #include "hwc_callbacks.h"
27 #include "hwc_layers.h"
28 #include "hwc_display.h"
29 #include "hwc_display_primary.h"
30 #include "hwc_display_external.h"
31 #include "hwc_display_virtual.h"
32 #include "hwc_color_manager.h"
33 #include "hwc_socket_handler.h"
34 
35 namespace sdm {
36 
37 class HWCSession : hwc2_device_t, public qClient::BnQClient {
38  public:
39   struct HWCModuleMethods : public hw_module_methods_t {
HWCModuleMethodsHWCModuleMethods40     HWCModuleMethods() { hw_module_methods_t::open = HWCSession::Open; }
41   };
42 
43   explicit HWCSession(const hw_module_t *module);
44   int Init();
45   int Deinit();
46   HWC2::Error CreateVirtualDisplayObject(uint32_t width, uint32_t height, int32_t *format);
47 
48   template <typename... Args>
CallDisplayFunction(hwc2_device_t * device,hwc2_display_t display,HWC2::Error (HWCDisplay::* member)(Args...),Args...args)49   static int32_t CallDisplayFunction(hwc2_device_t *device, hwc2_display_t display,
50                                      HWC2::Error (HWCDisplay::*member)(Args...), Args... args) {
51     if (!device) {
52       return HWC2_ERROR_BAD_DISPLAY;
53     }
54 
55     HWCSession *hwc_session = static_cast<HWCSession *>(device);
56     auto status = HWC2::Error::BadDisplay;
57     if (hwc_session->hwc_display_[display]) {
58       auto hwc_display = hwc_session->hwc_display_[display];
59       status = (hwc_display->*member)(std::forward<Args>(args)...);
60     }
61     return INT32(status);
62   }
63 
64   template <typename... Args>
CallLayerFunction(hwc2_device_t * device,hwc2_display_t display,hwc2_layer_t layer,HWC2::Error (HWCLayer::* member)(Args...),Args...args)65   static int32_t CallLayerFunction(hwc2_device_t *device, hwc2_display_t display,
66                                    hwc2_layer_t layer, HWC2::Error (HWCLayer::*member)(Args...),
67                                    Args... args) {
68     if (!device) {
69       return HWC2_ERROR_BAD_DISPLAY;
70     }
71 
72     HWCSession *hwc_session = static_cast<HWCSession *>(device);
73     int32_t status = INT32(HWC2::Error::BadDisplay);
74     if (hwc_session->hwc_display_[display]) {
75       status = hwc_session->hwc_display_[display]->CallLayerFunction(layer, member, args...);
76     }
77     return status;
78   }
79 
80   // HWC2 Functions that require a concrete implementation in hwc session
81   // and hence need to be member functions
82   static int32_t AcceptDisplayChanges(hwc2_device_t *device, hwc2_display_t display);
83   static int32_t CreateLayer(hwc2_device_t *device, hwc2_display_t display,
84                              hwc2_layer_t *out_layer_id);
85   static int32_t CreateVirtualDisplay(hwc2_device_t *device, uint32_t width, uint32_t height,
86                                       int32_t *format, hwc2_display_t *out_display_id);
87   static int32_t DestroyLayer(hwc2_device_t *device, hwc2_display_t display, hwc2_layer_t layer);
88   static int32_t DestroyVirtualDisplay(hwc2_device_t *device, hwc2_display_t display);
89   static void Dump(hwc2_device_t *device, uint32_t *out_size, char *out_buffer);
90   static int32_t PresentDisplay(hwc2_device_t *device, hwc2_display_t display,
91                                 int32_t *out_retire_fence);
92   static int32_t RegisterCallback(hwc2_device_t *device, int32_t descriptor,
93                                   hwc2_callback_data_t callback_data,
94                                   hwc2_function_pointer_t pointer);
95   static int32_t SetOutputBuffer(hwc2_device_t *device, hwc2_display_t display,
96                                  buffer_handle_t buffer, int32_t releaseFence);
97   static int32_t SetLayerZOrder(hwc2_device_t *device, hwc2_display_t display, hwc2_layer_t layer,
98                                 uint32_t z);
99   static int32_t SetPowerMode(hwc2_device_t *device, hwc2_display_t display, int32_t int_mode);
100   static int32_t ValidateDisplay(hwc2_device_t *device, hwc2_display_t display,
101                                  uint32_t *out_num_types, uint32_t *out_num_requests);
102   static int32_t SetColorMode(hwc2_device_t *device, hwc2_display_t display,
103                               int32_t /*android_color_mode_t*/ int_mode);
104   static int32_t SetColorTransform(hwc2_device_t *device, hwc2_display_t display,
105                                    const float *matrix, int32_t /*android_color_transform_t*/ hint);
106 
107  private:
108   static const int kExternalConnectionTimeoutMs = 500;
109   static const int kPartialUpdateControlTimeoutMs = 100;
110 
111   // hwc methods
112   static int Open(const hw_module_t *module, const char *name, hw_device_t **device);
113   static int Close(hw_device_t *device);
114   static void GetCapabilities(struct hwc2_device *device, uint32_t *outCount,
115                               int32_t *outCapabilities);
116   static hwc2_function_pointer_t GetFunction(struct hwc2_device *device, int32_t descriptor);
117 
118   // Uevent thread
119   static void *HWCUeventThread(void *context);
120   void *HWCUeventThreadHandler();
121   int GetEventValue(const char *uevent_data, int length, const char *event_info);
122   int HotPlugHandler(bool connected);
123   void ResetPanel();
124   int32_t ConnectDisplay(int disp);
125   int DisconnectDisplay(int disp);
126   int GetVsyncPeriod(int disp);
127 
128   // QClient methods
129   virtual android::status_t notifyCallback(uint32_t command, const android::Parcel *input_parcel,
130                                            android::Parcel *output_parcel);
131   void DynamicDebug(const android::Parcel *input_parcel);
132   void SetFrameDumpConfig(const android::Parcel *input_parcel);
133   android::status_t SetMaxMixerStages(const android::Parcel *input_parcel);
134   android::status_t SetDisplayMode(const android::Parcel *input_parcel);
135   android::status_t SetSecondaryDisplayStatus(const android::Parcel *input_parcel,
136                                               android::Parcel *output_parcel);
137   android::status_t ToggleScreenUpdates(const android::Parcel *input_parcel,
138                                         android::Parcel *output_parcel);
139   android::status_t ConfigureRefreshRate(const android::Parcel *input_parcel);
140   android::status_t QdcmCMDHandler(const android::Parcel *input_parcel,
141                                    android::Parcel *output_parcel);
142   android::status_t ControlPartialUpdate(const android::Parcel *input_parcel, android::Parcel *out);
143   android::status_t OnMinHdcpEncryptionLevelChange(const android::Parcel *input_parcel,
144                                                    android::Parcel *output_parcel);
145   android::status_t SetPanelBrightness(const android::Parcel *input_parcel,
146                                        android::Parcel *output_parcel);
147   android::status_t GetPanelBrightness(const android::Parcel *input_parcel,
148                                        android::Parcel *output_parcel);
149   // These functions return the actual display config info as opposed to FB
150   android::status_t HandleSetActiveDisplayConfig(const android::Parcel *input_parcel,
151                                                  android::Parcel *output_parcel);
152   android::status_t HandleGetActiveDisplayConfig(const android::Parcel *input_parcel,
153                                                  android::Parcel *output_parcel);
154   android::status_t HandleGetDisplayConfigCount(const android::Parcel *input_parcel,
155                                                 android::Parcel *output_parcel);
156   android::status_t HandleGetDisplayAttributesForConfig(const android::Parcel *input_parcel,
157                                                         android::Parcel *output_parcel);
158   android::status_t GetVisibleDisplayRect(const android::Parcel *input_parcel,
159                                           android::Parcel *output_parcel);
160 
161   android::status_t SetDynamicBWForCamera(const android::Parcel *input_parcel,
162                                           android::Parcel *output_parcel);
163   android::status_t GetBWTransactionStatus(const android::Parcel *input_parcel,
164                                            android::Parcel *output_parcel);
165   android::status_t SetMixerResolution(const android::Parcel *input_parcel);
166 
167   android::status_t SetColorModeOverride(const android::Parcel *input_parcel);
168 
169   android::status_t SetColorModeById(const android::Parcel *input_parcel);
170 
171   static Locker locker_;
172   CoreInterface *core_intf_ = NULL;
173   HWCDisplay *hwc_display_[HWC_NUM_DISPLAY_TYPES] = {NULL};
174   HWCCallbacks callbacks_;
175   pthread_t uevent_thread_;
176   bool uevent_thread_exit_ = false;
177   const char *uevent_thread_name_ = "HWC_UeventThread";
178   HWCBufferAllocator *buffer_allocator_;
179   HWCBufferSyncHandler buffer_sync_handler_;
180   HWCColorManager *color_mgr_ = NULL;
181   bool reset_panel_ = false;
182   bool secure_display_active_ = false;
183   bool external_pending_connect_ = false;
184   bool new_bw_mode_ = false;
185   bool need_invalidate_ = false;
186   int bw_mode_release_fd_ = -1;
187   qService::QService *qservice_ = NULL;
188   HWCSocketHandler socket_handler_;
189 };
190 
191 }  // namespace sdm
192 
193 #endif  // __HWC_SESSION_H__
194