Fix no output on second physical display

The RefreshRateConfigs only store the configs of default display
when init. But setAllowedDisplayConfigs would get NPE while getting
these configs from secondary display.
We need to cache the configs of external physical display when hotplug.

Bug: 127868178
Test: build and flash mojave device.
Change-Id: Ie1b598e8f77b28a444097deb0e05dda10d197db5

1 files changed, 4 insertions, 0 deletions

diff --git a/services/surfaceflinger/SurfaceFlinger.cpp b/services/surfaceflinger/SurfaceFlinger.cpp
index 945f6fa6ac..a5f025d973 100644
--- a/services/surfaceflinger/SurfaceFlinger.cpp
+++ b/services/surfaceflinger/SurfaceFlinger.cpp
@@ -2519,6 +2519,9 @@ void SurfaceFlinger::processDisplayHotplugEventsLocked() {
                 state.displayName = info->name;
                 mCurrentState.displays.add(mPhysicalDisplayTokens[info->id], state);
                 mInterceptor->saveDisplayCreation(state);
+                // TODO(b/123715322): Removes the per-display state that was added to the scheduler.
+                mRefreshRateConfigs[info->id] = std::make_shared<scheduler::RefreshRateConfigs>(
+                        getHwComposer().getConfigs(info->id));
             }
         } else {
             ALOGV("Removing display %s", to_string(info->id).c_str());
@@ -2530,6 +2533,7 @@ void SurfaceFlinger::processDisplayHotplugEventsLocked() {
                 mCurrentState.displays.removeItemsAt(index);
             }
             mPhysicalDisplayTokens.erase(info->id);
+            mRefreshRateConfigs.erase(info->id);
         }
 
         processDisplayChangesLocked();