commit 2f5f8a51f5994cf14837030d4b3b252a9d1b950b
author Daniel Nicoara <dnicoara@google.com> Tue Dec 20 16:11:58 2016 -0500
committer Daniel Nicoara <dnicoara@google.com> Wed Jan 25 16:47:13 2017 -0500
tree 47b74840e80435bbdb37de954a738f7705839068
parent 51a0a56385f4176447d8168f9395341b3e7574a0

VR: Add ability to pass layer info through SurfaceFlinger

Updates SurfaceFlinger to connect to the VR HWC service and pass
additional layer information.

For now VR mode is enabled at build time.

Bug: 33297385
Test: Ran on device and verified the IVrComposerClient::setLayerInfo()
call is done successfully.

Change-Id: I9dea2451a3a2aa1919395d3785ae00446ba51f26

services/surfaceflinger/DisplayHardware/ComposerHal.cpp

diff --git a/services/surfaceflinger/DisplayHardware/ComposerHal.cpp b/services/surfaceflinger/DisplayHardware/ComposerHal.cpp
index 2f2f3a9..1bd9616 100644
--- a/services/surfaceflinger/DisplayHardware/ComposerHal.cpp
+++ b/services/surfaceflinger/DisplayHardware/ComposerHal.cpp
@@ -17,6 +17,7 @@
 #undef LOG_TAG
 #define LOG_TAG "HwcComposer"
 
+#include <android/dvr/composer/1.0/IVrComposerClient.h>
 #include <inttypes.h>
 #include <log/log.h>
 
@@ -24,6 +25,7 @@
 
 namespace android {
 
+using dvr::composer::V1_0::IVrComposerClient;
 using hardware::Return;
 using hardware::hidl_vec;
 using hardware::hidl_handle;
@@ -102,10 +104,37 @@
 
 } // anonymous namespace
 
-Composer::Composer()
-    : mWriter(kWriterInitialSize)
+Composer::CommandWriter::CommandWriter(uint32_t initialMaxSize)
+    : CommandWriterBase(initialMaxSize) {}
+
+Composer::CommandWriter::~CommandWriter()
 {
-    mComposer = IComposer::getService("hwcomposer");
+}
+
+void Composer::CommandWriter::setLayerInfo(uint32_t type, uint32_t appId)
+{
+    constexpr uint16_t kSetLayerInfoLength = 2;
+    beginCommand(
+        static_cast<IComposerClient::Command>(
+            IVrComposerClient::VrCommand::SET_LAYER_INFO),
+        kSetLayerInfoLength);
+    write(type);
+    write(appId);
+    endCommand();
+}
+
+Composer::Composer() : mWriter(kWriterInitialSize)
+{
+#if defined(IN_VR_MODE)
+    mIsInVrMode = true;
+#endif
+
+    if (mIsInVrMode) {
+        mComposer = IComposer::getService("vr_hwcomposer");
+    } else {
+        mComposer = IComposer::getService("hwcomposer");
+    }
+
     if (mComposer == nullptr) {
         LOG_ALWAYS_FATAL("failed to get hwcomposer service");
     }
@@ -589,6 +618,18 @@
     return Error::NONE;
 }
 
+Error Composer::setLayerInfo(Display display, Layer layer, uint32_t type,
+                             uint32_t appId)
+{
+    if (mIsInVrMode)
+    {
+        mWriter.selectDisplay(display);
+        mWriter.selectLayer(layer);
+        mWriter.setLayerInfo(type, appId);
+    }
+    return Error::NONE;
+}
+
 Error Composer::execute()
 {
     // prepare input command queue