displayconfig: Add support for AllowIdleFallback interface

Change-Id: Ibe07e550faa33bf68bc12bcd0ae5ffc1ffdf4a20
CRs-Fixed: 2928557

services/config/config_defs.h

@@ -42,6 +42,7 @@
 // client code will automatically get compiled.
 #define DISPLAY_CONFIG_API_LEVEL_0
 #define DISPLAY_CONFIG_API_LEVEL_1
+#define DISPLAY_CONFIG_API_LEVEL_2
 
 namespace DisplayConfig {
 
@@ -324,6 +325,7 @@ class ConfigInterface {
                                       bool* /* supported */) DEFAULT_RET
   virtual int GetDisplayType(uint64_t /* physical_disp_id */,
                              DisplayType* /* disp_type */) DEFAULT_RET
+  virtual int AllowIdleFallback() DEFAULT_RET
   virtual int DummyDisplayConfigAPI() DEFAULT_RET
 
   // deprecated APIs

services/config/src/client_impl.cpp

@@ -995,6 +995,17 @@ int ClientImpl::GetDisplayType(uint64_t physical_disp_id, DisplayType *disp_type
   return error;
 }
 
+int ClientImpl::AllowIdleFallback() {
+  int error = 0;
+  auto hidl_cb = [&error] (int32_t err, ByteStream params, HandleStream handles) {
+    error = err;
+  };
+  if (display_config_) {
+    display_config_->perform(client_handle_, kAllowIdleFallback, {}, {}, hidl_cb);
+  }
+  return error;
+}
+
 void ClientCallback::ParseNotifyCWBBufferDone(const ByteStream &input_params,
                                               const HandleStream &input_handles) {
   const int *error;

services/config/src/client_impl.h

@@ -126,6 +126,7 @@ class ClientImpl : public ClientInterface {
   virtual int ControlIdleStatusCallback(bool enable);
   virtual int IsSupportedConfigSwitch(uint32_t disp_id, uint32_t config, bool *supported);
   virtual int GetDisplayType(uint64_t physical_disp_id, DisplayType *disp_type);
+  virtual int AllowIdleFallback();
   virtual int DummyDisplayConfigAPI();
 
  private:

services/config/src/device_impl.cpp

@@ -851,6 +851,11 @@ void DeviceImpl::DeviceClientContext::ParseGetDisplayType(const ByteStream &inpu
   _hidl_cb(error, output_params, {});
 }
 
+void DeviceImpl::DeviceClientContext::ParseAllowIdleFallback(perform_cb _hidl_cb) {
+  int32_t error = intf_->AllowIdleFallback();
+  _hidl_cb(error, {}, {});
+}
+
 Return<void> DeviceImpl::perform(uint64_t client_handle, uint32_t op_code,
                                  const ByteStream &input_params, const HandleStream &input_handles,
                                  perform_cb _hidl_cb) {
@@ -1019,6 +1024,9 @@ Return<void> DeviceImpl::perform(uint64_t client_handle, uint32_t op_code,
     case kGetDisplayType:
       client->ParseGetDisplayType(input_params, _hidl_cb);
       break;
+    case kAllowIdleFallback:
+      client->ParseAllowIdleFallback(_hidl_cb);
+      break;
     case kDummyOpcode:
       _hidl_cb(-EINVAL, {}, {});
       break;

services/config/src/device_impl.h

@@ -1,5 +1,5 @@
 /*
-* Copyright (c) 2020 The Linux Foundation. All rights reserved.
+* Copyright (c) 2021 The Linux Foundation. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
@@ -125,6 +125,7 @@ class DeviceImpl : public IDisplayConfig, public android::hardware::hidl_death_r
                                         perform_cb _hidl_cb);
     void ParseIsSupportedConfigSwitch(const ByteStream &input_params, perform_cb _hidl_cb);
     void ParseGetDisplayType(const ByteStream &input_params, perform_cb _hidl_cb);
+    void ParseAllowIdleFallback(perform_cb _hidl_cb);
 
    private:
     ConfigInterface *intf_ = nullptr;

services/config/src/opcode_types.h

@@ -82,7 +82,8 @@ enum OpCode {
   kControlIdleStatusCallback = 46,
   kIsSupportedConfigSwitch = 47,
   kGetDisplayType = 48,
-  kDummyOpcode = 49,
+  kAllowIdleFallback = 49,
+  kDummyOpcode = 50,
 
   kDestroy = 0xFFFF, // Destroy sequence execution
 };