commit 55c85404f7155da7cea22b5394bad960493d4e10
author Dominik Laskowski <domlaskowski@google.com> Tue Jan 21 16:25:47 2020 -0800
committer Dominik Laskowski <domlaskowski@google.com> Thu Feb 06 12:12:26 2020 -0800
tree ca30d82a2d636294340cd9afcd260f2ee905e67a
parent c4173b5fac778586a7696d3df606590909b38432

SF: Populate DisplayConnectionType in DisplayInfo

Without HWC support, fall back to categorizing the primary display as
internal, and secondary displays as external.

Also, validate displays in HWComposer for other 2.4 APIs.

Bug: 134771872
Test: dumpsys SurfaceFlinger --displays
Test: dumpsys display
Test: libsurfaceflinger_unittest
Change-Id: I139eeab9cc34e21a1b8584a2fcb9c9fd5dc43ac3

services/surfaceflinger/DisplayHardware/HWC2.cpp

diff --git a/services/surfaceflinger/DisplayHardware/HWC2.cpp b/services/surfaceflinger/DisplayHardware/HWC2.cpp
index 41e7879..dd3dba1 100644
--- a/services/surfaceflinger/DisplayHardware/HWC2.cpp
+++ b/services/surfaceflinger/DisplayHardware/HWC2.cpp
@@ -95,13 +95,13 @@
 }
 
 namespace impl {
+
 Display::Display(android::Hwc2::Composer& composer,
                  const std::unordered_set<Capability>& capabilities, hwc2_display_t id,
                  DisplayType type)
       : mComposer(composer),
         mCapabilities(capabilities),
         mId(id),
-        mIsConnected(false),
         mType(type) {
     ALOGV("Created display %" PRIu64, id);
 }
@@ -109,20 +109,27 @@
 Display::~Display() {
     mLayers.clear();
 
-    if (mType == DisplayType::Virtual) {
-        ALOGV("Destroying virtual display");
-        auto intError = mComposer.destroyVirtualDisplay(mId);
-        auto error = static_cast<Error>(intError);
-        ALOGE_IF(error != Error::None, "destroyVirtualDisplay(%" PRIu64
-                ") failed: %s (%d)", mId, to_string(error).c_str(), intError);
-    } else if (mType == DisplayType::Physical) {
-        auto error = setVsyncEnabled(HWC2::Vsync::Disable);
-        if (error != Error::None) {
-            ALOGE("~Display: Failed to disable vsync for display %" PRIu64
-                    ": %s (%d)", mId, to_string(error).c_str(),
-                    static_cast<int32_t>(error));
-        }
+    Error error = Error::None;
+    const char* msg;
+    switch (mType) {
+        case DisplayType::Physical:
+            error = setVsyncEnabled(HWC2::Vsync::Disable);
+            msg = "disable VSYNC for";
+            break;
+
+        case DisplayType::Virtual:
+            error = static_cast<Error>(mComposer.destroyVirtualDisplay(mId));
+            msg = "destroy virtual";
+            break;
+
+        case DisplayType::Invalid: // Used in unit tests.
+            break;
     }
+
+    ALOGE_IF(error != Error::None, "%s: Failed to %s display %" PRIu64 ": %s (%d)", __FUNCTION__,
+             msg, mId, to_string(error).c_str(), static_cast<int32_t>(error));
+
+    ALOGV("Destroyed display %" PRIu64, mId);
 }
 
 // Required by HWC2 display
@@ -372,9 +379,19 @@
     return Error::None;
 }
 
-Error Display::getType(DisplayType* outType) const
-{
-    *outType = mType;
+Error Display::getConnectionType(android::DisplayConnectionType* outType) const {
+    if (mType != DisplayType::Physical) return Error::BadDisplay;
+
+    using ConnectionType = Hwc2::IComposerClient::DisplayConnectionType;
+    ConnectionType connectionType;
+    const auto error = static_cast<Error>(mComposer.getDisplayConnectionType(mId, &connectionType));
+    if (error != Error::None) {
+        return error;
+    }
+
+    *outType = connectionType == ConnectionType::INTERNAL
+            ? android::DisplayConnectionType::Internal
+            : android::DisplayConnectionType::External;
     return Error::None;
 }