diff --git a/services/audiopolicy/managerdefault/AudioPolicyManager.cpp b/services/audiopolicy/managerdefault/AudioPolicyManager.cpp
index 5ff1c0b..d6e3c16 100644
--- a/services/audiopolicy/managerdefault/AudioPolicyManager.cpp
+++ b/services/audiopolicy/managerdefault/AudioPolicyManager.cpp
@@ -55,6 +55,17 @@
     return setDeviceConnectionStateInt(device, state, device_address, device_name);
 }
 
+void AudioPolicyManager::broadcastDeviceConnectionState(audio_devices_t device,
+                                                        audio_policy_dev_state_t state,
+                                                        const String8 &device_address)
+{
+    AudioParameter param(device_address);
+    const String8 key(state == AUDIO_POLICY_DEVICE_STATE_AVAILABLE ?
+                AUDIO_PARAMETER_DEVICE_CONNECT : AUDIO_PARAMETER_DEVICE_DISCONNECT);
+    param.addInt(key, device);
+    mpClientInterface->setParameters(AUDIO_IO_HANDLE_NONE, param.toString());
+}
+
 status_t AudioPolicyManager::setDeviceConnectionStateInt(audio_devices_t device,
                                                          audio_policy_dev_state_t state,
                                                          const char *device_address,
@@ -103,8 +114,15 @@
                 return NO_MEMORY;
             }
 
+            // Before checking outputs, broadcast connect event to allow HAL to retrieve dynamic
+            // parameters on newly connected devices (instead of opening the outputs...)
+            broadcastDeviceConnectionState(device, state, devDesc->mAddress);
+
             if (checkOutputsForDevice(devDesc, state, outputs, devDesc->mAddress) != NO_ERROR) {
                 mAvailableOutputDevices.remove(devDesc);
+
+                broadcastDeviceConnectionState(device, AUDIO_POLICY_DEVICE_STATE_UNAVAILABLE,
+                                               devDesc->mAddress);
                 return INVALID_OPERATION;
             }
             // Propagate device availability to Engine
@@ -116,11 +134,6 @@
             ALOGV("setDeviceConnectionState() checkOutputsForDevice() returned %zu outputs",
                   outputs.size());
 
-            // Send connect to HALs
-            AudioParameter param = AudioParameter(devDesc->mAddress);
-            param.addInt(String8(AUDIO_PARAMETER_DEVICE_CONNECT), device);
-            mpClientInterface->setParameters(AUDIO_IO_HANDLE_NONE, param.toString());
-
             } break;
         // handle output device disconnection
         case AUDIO_POLICY_DEVICE_STATE_UNAVAILABLE: {
@@ -132,9 +145,7 @@
             ALOGV("setDeviceConnectionState() disconnecting output device %x", device);
 
             // Send Disconnect to HALs
-            AudioParameter param = AudioParameter(devDesc->mAddress);
-            param.addInt(String8(AUDIO_PARAMETER_DEVICE_DISCONNECT), device);
-            mpClientInterface->setParameters(AUDIO_IO_HANDLE_NONE, param.toString());
+            broadcastDeviceConnectionState(device, state, devDesc->mAddress);
 
             // remove device from available output devices
             mAvailableOutputDevices.remove(devDesc);
@@ -213,7 +224,14 @@
                       device);
                 return INVALID_OPERATION;
             }
+
+            // Before checking intputs, broadcast connect event to allow HAL to retrieve dynamic
+            // parameters on newly connected devices (instead of opening the inputs...)
+            broadcastDeviceConnectionState(device, state, devDesc->mAddress);
+
             if (checkInputsForDevice(devDesc, state, inputs, devDesc->mAddress) != NO_ERROR) {
+                broadcastDeviceConnectionState(device, AUDIO_POLICY_DEVICE_STATE_UNAVAILABLE,
+                                               devDesc->mAddress);
                 return INVALID_OPERATION;
             }
 
@@ -224,11 +242,6 @@
                 return NO_MEMORY;
             }
 
-            // Set connect to HALs
-            AudioParameter param = AudioParameter(devDesc->mAddress);
-            param.addInt(String8(AUDIO_PARAMETER_DEVICE_CONNECT), device);
-            mpClientInterface->setParameters(AUDIO_IO_HANDLE_NONE, param.toString());
-
             // Propagate device availability to Engine
             mEngine->setDeviceConnectionState(devDesc, state);
         } break;
@@ -243,9 +256,7 @@
             ALOGV("setDeviceConnectionState() disconnecting input device %x", device);
 
             // Set Disconnect to HALs
-            AudioParameter param = AudioParameter(devDesc->mAddress);
-            param.addInt(String8(AUDIO_PARAMETER_DEVICE_DISCONNECT), device);
-            mpClientInterface->setParameters(AUDIO_IO_HANDLE_NONE, param.toString());
+            broadcastDeviceConnectionState(device, state, devDesc->mAddress);
 
             checkInputsForDevice(devDesc, state, inputs, devDesc->mAddress);
             mAvailableInputDevices.remove(devDesc);
diff --git a/services/audiopolicy/managerdefault/AudioPolicyManager.h b/services/audiopolicy/managerdefault/AudioPolicyManager.h
index bbdf396..ebf9315 100644
--- a/services/audiopolicy/managerdefault/AudioPolicyManager.h
+++ b/services/audiopolicy/managerdefault/AudioPolicyManager.h
@@ -572,6 +572,15 @@
         // Audio Policy Engine Interface.
         AudioPolicyManagerInterface *mEngine;
 private:
+        // Notify the policy client of any change of device state with AUDIO_IO_HANDLE_NONE,
+        // so that the client interprets it as global to audio hardware interfaces.
+        // It can give a chance to HAL implementer to retrieve dynamic capabilities associated
+        // to this device for example.
+        // TODO avoid opening stream to retrieve capabilities of a profile.
+        void broadcastDeviceConnectionState(audio_devices_t device,
+                                            audio_policy_dev_state_t state,
+                                            const String8 &device_address);
+
         // updates device caching and output for streams that can influence the
         //    routing of notifications
         void handleNotificationRoutingForStream(audio_stream_type_t stream);