display: Clean up binder interface

The current binder implementation is inflexible when it comes to
adding new input/output parameters. It also needs a lot of
boilerplate code written when adding a simple enable/disable type
command.
Instead, let clients specify the parcels they want to pass and
unparcel them at the end points only.
Please note that it is assumed that all commands coming in
need the same permission checks. If this is no longer the case,
some commands need to be split out on the receiver end in
IQService.cpp.
This change also simplifies the code end clients need to write.
They should be able to include QServiceUtils and call a single
function to set the binder up and make the call.

Change-Id: I4db66f2427ecf16d7a6264462ae85815217a16b1
diff --git a/msm8084/libqservice/QServiceUtils.h b/msm8084/libqservice/QServiceUtils.h
new file mode 100644
index 0000000..3d1adc0
--- /dev/null
+++ b/msm8084/libqservice/QServiceUtils.h
@@ -0,0 +1,86 @@
+/*
+* Copyright (c) 2013 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
+* met:
+*    * Redistributions of source code must retain the above copyright
+*      notice, this list of conditions and the following disclaimer.
+*    * Redistributions in binary form must reproduce the above
+*      copyright notice, this list of conditions and the following
+*      disclaimer in the documentation and/or other materials provided
+*      with the distribution.
+*    * Neither the name of The Linux Foundation. nor the names of its
+*      contributors may be used to endorse or promote products derived
+*      from this software without specific prior written permission.
+*
+* THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
+* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
+* ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
+* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
+* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
+* OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
+* IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
+
+#ifndef QSERVICEUTILS_H
+#define QSERVICEUTILS_H
+#include <binder/Parcel.h>
+#include <binder/IServiceManager.h>
+#include <utils/RefBase.h>
+#include <IQService.h>
+
+// ----------------------------------------------------------------------------
+// Helpers
+// ----------------------------------------------------------------------------
+inline android::sp<qService::IQService> getBinder() {
+    android::sp<android::IServiceManager> sm = android::defaultServiceManager();
+    android::sp<qService::IQService> binder =
+            android::interface_cast<qService::IQService>
+            (sm->getService(android::String16("display.qservice")));
+    if (binder == NULL) {
+        ALOGE("%s: invalid binder object", __FUNCTION__);
+    }
+    return binder;
+}
+
+inline android::status_t sendSingleParam(uint32_t command, uint32_t value) {
+    android::status_t err = android::FAILED_TRANSACTION;
+    android::sp<qService::IQService> binder = getBinder();
+    android::Parcel inParcel, outParcel;
+    inParcel.writeInt32(value);
+    if(binder != NULL) {
+        err = binder->dispatch(command, &inParcel , &outParcel);
+    }
+    return err;
+}
+
+// ----------------------------------------------------------------------------
+// Convenience wrappers that clients can call
+// ----------------------------------------------------------------------------
+inline android::status_t securing(uint32_t startEnd) {
+    return sendSingleParam(qService::IQService::SECURING, startEnd);
+}
+
+inline android::status_t unsecuring(uint32_t startEnd) {
+    return sendSingleParam(qService::IQService::UNSECURING, startEnd);
+}
+
+inline android::status_t screenRefresh() {
+    return sendSingleParam(qService::IQService::SCREEN_REFRESH, 1);
+}
+
+inline android::status_t setExtOrientation(uint32_t orientation) {
+    return sendSingleParam(qService::IQService::EXTERNAL_ORIENTATION,
+            orientation);
+}
+
+inline android::status_t setBufferMirrorMode(uint32_t enable) {
+    return sendSingleParam(qService::IQService::BUFFER_MIRRORMODE, enable);
+}
+
+#endif /* end of include guard: QSERVICEUTILS_H */