Turn on support for async cursor update in surfaceflinger.

If available, surfaceflinger will use the hwc setCursorPositionAsync()
api to change the position of supported cursor layers outside of
the usual prepare/set loop.

Change-Id: Ib3fc5c0c390b3489ddbba202379840a1d2748917

1 files changed, 25 insertions, 0 deletions

diff --git a/services/surfaceflinger/DisplayHardware/HWComposer.cpp b/services/surfaceflinger/DisplayHardware/HWComposer.cpp
index 185dab2..a8fb5bd 100644
--- a/services/surfaceflinger/DisplayHardware/HWComposer.cpp
+++ b/services/surfaceflinger/DisplayHardware/HWComposer.cpp
@@ -681,6 +681,9 @@ status_t HWComposer::prepare() {
                     if (l.compositionType == HWC_OVERLAY) {
                         disp.hasOvComp = true;
                     }
+                    if (l.compositionType == HWC_CURSOR_OVERLAY) {
+                        disp.hasOvComp = true;
+                    }
                 }
                 if (disp.list->numHwLayers == (disp.framebufferTarget ? 1 : 0)) {
                     disp.hasFbComp = true;
@@ -853,6 +856,16 @@ sp<Fence> HWComposer::getLastRetireFence(int32_t id) const {
     return mDisplayData[id].lastRetireFence;
 }
 
+status_t HWComposer::setCursorPositionAsync(int32_t id, const Rect& pos)
+{
+    if (mHwc->setCursorPositionAsync) {
+        return (status_t)mHwc->setCursorPositionAsync(mHwc, id, pos.left, pos.top);
+    }
+    else {
+        return NO_ERROR;
+    }
+}
+
 /*
  * Helper template to implement a concrete HWCLayer
  * This holds the pointer to the concrete hwc layer type
@@ -935,6 +948,16 @@ public:
             getLayer()->flags &= ~HWC_SKIP_LAYER;
         }
     }
+    virtual void setIsCursorLayerHint(bool isCursor) {
+        if (hwcHasApiVersion(mHwc, HWC_DEVICE_API_VERSION_1_4)) {
+            if (isCursor) {
+                getLayer()->flags |= HWC_IS_CURSOR_LAYER;
+            }
+            else {
+                getLayer()->flags &= ~HWC_IS_CURSOR_LAYER;
+            }
+        }
+    }
     virtual void setBlending(uint32_t blending) {
         getLayer()->blending = blending;
     }
@@ -1122,6 +1145,8 @@ void HWComposer::dump(String8& result) const {
                             "HWC",
                             "BKGND",
                             "FB TARGET",
+                            "SIDEBAND",
+                            "HWC_CURSOR",
                             "UNKNOWN"};
                     if (type >= NELEM(compositionTypeName))
                         type = NELEM(compositionTypeName) - 1;