diff --git a/include/ui/Input.h b/include/ui/Input.h
index c9f694a..f1385a0 100644
--- a/include/ui/Input.h
+++ b/include/ui/Input.h
@@ -206,10 +206,17 @@
 
     float getAxisValue(int32_t axis) const;
     status_t setAxisValue(int32_t axis, float value);
-    float* editAxisValue(int32_t axis);
 
     void scale(float scale);
 
+    inline float getX() const {
+        return getAxisValue(AMOTION_EVENT_AXIS_X);
+    }
+
+    inline float getY() const {
+        return getAxisValue(AMOTION_EVENT_AXIS_Y);
+    }
+
 #ifdef HAVE_ANDROID_OS
     status_t readFromParcel(Parcel* parcel);
     status_t writeToParcel(Parcel* parcel) const;
diff --git a/include/utils/BitSet.h b/include/utils/BitSet.h
index 600017e..9452e86 100644
--- a/include/utils/BitSet.h
+++ b/include/utils/BitSet.h
@@ -68,6 +68,30 @@
     // Result is undefined if all bits are unmarked.
     inline uint32_t lastMarkedBit() const { return 31 - __builtin_ctz(value); }
 
+    // Finds the first marked bit in the set and clears it.  Returns the bit index.
+    // Result is undefined if all bits are unmarked.
+    inline uint32_t clearFirstMarkedBit() {
+        uint32_t n = firstMarkedBit();
+        clearBit(n);
+        return n;
+    }
+
+    // Finds the first unmarked bit in the set and marks it.  Returns the bit index.
+    // Result is undefined if all bits are marked.
+    inline uint32_t markFirstUnmarkedBit() {
+        uint32_t n = firstUnmarkedBit();
+        markBit(n);
+        return n;
+    }
+
+    // Finds the last marked bit in the set and clears it.  Returns the bit index.
+    // Result is undefined if all bits are unmarked.
+    inline uint32_t clearLastMarkedBit() {
+        uint32_t n = lastMarkedBit();
+        clearBit(n);
+        return n;
+    }
+
     // Gets the index of the specified bit in the set, which is the number of
     // marked bits that appear before the specified bit.
     inline uint32_t getIndexOfBit(uint32_t n) const {
diff --git a/libs/gui/SurfaceTexture.cpp b/libs/gui/SurfaceTexture.cpp
index 16755ad..4f51f03 100644
--- a/libs/gui/SurfaceTexture.cpp
+++ b/libs/gui/SurfaceTexture.cpp
@@ -168,18 +168,18 @@
         }
     }
 
+    const int minBufferSlots = mSynchronousMode ?
+            MIN_SYNC_BUFFER_SLOTS : MIN_ASYNC_BUFFER_SLOTS;
     if (bufferCount == 0) {
-        const int minBufferSlots = mSynchronousMode ?
-                MIN_SYNC_BUFFER_SLOTS : MIN_ASYNC_BUFFER_SLOTS;
         mClientBufferCount = 0;
         bufferCount = (mServerBufferCount >= minBufferSlots) ?
                 mServerBufferCount : minBufferSlots;
         return setBufferCountServerLocked(bufferCount);
     }
 
-    // We don't allow the client to set a buffer-count less than
-    // MIN_ASYNC_BUFFER_SLOTS (3), there is no reason for it.
-    if (bufferCount < MIN_ASYNC_BUFFER_SLOTS) {
+    if (bufferCount < minBufferSlots) {
+        LOGE("setBufferCount: requested buffer count (%d) is less than "
+                "minimum (%d)", bufferCount, minBufferSlots);
         return BAD_VALUE;
     }
 
diff --git a/libs/gui/SurfaceTextureClient.cpp b/libs/gui/SurfaceTextureClient.cpp
index e6837ea..d1037de 100644
--- a/libs/gui/SurfaceTextureClient.cpp
+++ b/libs/gui/SurfaceTextureClient.cpp
@@ -258,10 +258,10 @@
     int res = NO_ERROR;
     switch (operation) {
     case NATIVE_WINDOW_CONNECT:
-        res = dispatchConnect(args);
+        // deprecated. must return NO_ERROR.
         break;
     case NATIVE_WINDOW_DISCONNECT:
-        res = dispatchDisconnect(args);
+        // deprecated. must return NO_ERROR.
         break;
     case NATIVE_WINDOW_SET_USAGE:
         res = dispatchSetUsage(args);
@@ -296,6 +296,12 @@
     case NATIVE_WINDOW_SET_SCALING_MODE:
         res = dispatchSetScalingMode(args);
         break;
+    case NATIVE_WINDOW_API_CONNECT:
+        res = dispatchConnect(args);
+        break;
+    case NATIVE_WINDOW_API_DISCONNECT:
+        res = dispatchDisconnect(args);
+        break;
     default:
         res = NAME_NOT_FOUND;
         break;
diff --git a/libs/ui/FramebufferNativeWindow.cpp b/libs/ui/FramebufferNativeWindow.cpp
index 0e8ae61..8949730 100644
--- a/libs/ui/FramebufferNativeWindow.cpp
+++ b/libs/ui/FramebufferNativeWindow.cpp
@@ -317,6 +317,8 @@
         case NATIVE_WINDOW_SET_BUFFERS_DIMENSIONS:
         case NATIVE_WINDOW_SET_BUFFERS_FORMAT:
         case NATIVE_WINDOW_SET_BUFFERS_TRANSFORM:
+        case NATIVE_WINDOW_API_CONNECT:
+        case NATIVE_WINDOW_API_DISCONNECT:
             // TODO: we should implement these
             return NO_ERROR;
 
diff --git a/libs/ui/GraphicBufferAllocator.cpp b/libs/ui/GraphicBufferAllocator.cpp
index 33ef1fc..e75415b 100644
--- a/libs/ui/GraphicBufferAllocator.cpp
+++ b/libs/ui/GraphicBufferAllocator.cpp
@@ -61,13 +61,19 @@
     const size_t c = list.size();
     for (size_t i=0 ; i<c ; i++) {
         const alloc_rec_t& rec(list.valueAt(i));
-        snprintf(buffer, SIZE, "%10p: %7.2f KiB | %4u (%4u) x %4u | %8X | 0x%08x\n",
-            list.keyAt(i), rec.size/1024.0f, 
-            rec.w, rec.s, rec.h, rec.format, rec.usage);
+        if (rec.size) {
+            snprintf(buffer, SIZE, "%10p: %7.2f KiB | %4u (%4u) x %4u | %8X | 0x%08x\n",
+                    list.keyAt(i), rec.size/1024.0f,
+                    rec.w, rec.s, rec.h, rec.format, rec.usage);
+        } else {
+            snprintf(buffer, SIZE, "%10p: unknown     | %4u (%4u) x %4u | %8X | 0x%08x\n",
+                    list.keyAt(i),
+                    rec.w, rec.s, rec.h, rec.format, rec.usage);
+        }
         result.append(buffer);
         total += rec.size;
     }
-    snprintf(buffer, SIZE, "Total allocated: %.2f KB\n", total/1024.0f);
+    snprintf(buffer, SIZE, "Total allocated (estimate): %.2f KB\n", total/1024.0f);
     result.append(buffer);
     if (mAllocDev->common.version >= 1 && mAllocDev->dump) {
         mAllocDev->dump(mAllocDev, buffer, SIZE);
@@ -101,13 +107,19 @@
     if (err == NO_ERROR) {
         Mutex::Autolock _l(sLock);
         KeyedVector<buffer_handle_t, alloc_rec_t>& list(sAllocList);
+        int bpp = bytesPerPixel(format);
+        if (bpp < 0) {
+            // probably a HAL custom format. in any case, we don't know
+            // what its pixel size is.
+            bpp = 0;
+        }
         alloc_rec_t rec;
         rec.w = w;
         rec.h = h;
         rec.s = *stride;
         rec.format = format;
         rec.usage = usage;
-        rec.size = h * stride[0] * bytesPerPixel(format);
+        rec.size = h * stride[0] * bpp;
         list.add(*handle, rec);
     }
 
diff --git a/libs/ui/Input.cpp b/libs/ui/Input.cpp
index 0af7f80..688b998 100644
--- a/libs/ui/Input.cpp
+++ b/libs/ui/Input.cpp
@@ -280,6 +280,9 @@
     uint64_t axisBit = 1LL << axis;
     uint32_t index = __builtin_popcountll(bits & (axisBit - 1LL));
     if (!(bits & axisBit)) {
+        if (value == 0) {
+            return OK; // axes with value 0 do not need to be stored
+        }
         uint32_t count = __builtin_popcountll(bits);
         if (count >= MAX_AXES) {
             tooManyAxes(axis);
@@ -294,23 +297,10 @@
     return OK;
 }
 
-float* PointerCoords::editAxisValue(int32_t axis) {
-    if (axis < 0 || axis > 63) {
-        return NULL;
-    }
-
-    uint64_t axisBit = 1LL << axis;
-    if (!(bits & axisBit)) {
-        return NULL;
-    }
-    uint32_t index = __builtin_popcountll(bits & (axisBit - 1LL));
-    return &values[index];
-}
-
 static inline void scaleAxisValue(PointerCoords& c, int axis, float scaleFactor) {
-    float* value = c.editAxisValue(axis);
-    if (value) {
-        *value *= scaleFactor;
+    float value = c.getAxisValue(axis);
+    if (value != 0) {
+        c.setAxisValue(axis, value * scaleFactor);
     }
 }
 
@@ -574,20 +564,14 @@
     size_t numSamples = mSamplePointerCoords.size();
     for (size_t i = 0; i < numSamples; i++) {
         PointerCoords& c = mSamplePointerCoords.editItemAt(i);
-        float* xPtr = c.editAxisValue(AMOTION_EVENT_AXIS_X);
-        float* yPtr = c.editAxisValue(AMOTION_EVENT_AXIS_Y);
-        if (xPtr && yPtr) {
-            float x = *xPtr + oldXOffset;
-            float y = *yPtr + oldYOffset;
-            matrix->mapXY(SkFloatToScalar(x), SkFloatToScalar(y), & point);
-            *xPtr = SkScalarToFloat(point.fX) - newXOffset;
-            *yPtr = SkScalarToFloat(point.fY) - newYOffset;
-        }
+        float x = c.getAxisValue(AMOTION_EVENT_AXIS_X) + oldXOffset;
+        float y = c.getAxisValue(AMOTION_EVENT_AXIS_Y) + oldYOffset;
+        matrix->mapXY(SkFloatToScalar(x), SkFloatToScalar(y), &point);
+        c.setAxisValue(AMOTION_EVENT_AXIS_X, SkScalarToFloat(point.fX) - newXOffset);
+        c.setAxisValue(AMOTION_EVENT_AXIS_Y, SkScalarToFloat(point.fY) - newYOffset);
 
-        float* orientationPtr = c.editAxisValue(AMOTION_EVENT_AXIS_ORIENTATION);
-        if (orientationPtr) {
-            *orientationPtr = transformAngle(matrix, *orientationPtr);
-        }
+        float orientation = c.getAxisValue(AMOTION_EVENT_AXIS_ORIENTATION);
+        c.setAxisValue(AMOTION_EVENT_AXIS_ORIENTATION, transformAngle(matrix, orientation));
     }
 }
 
@@ -727,7 +711,7 @@
     }
 
     while (idBits.count() > MAX_POINTERS) {
-        idBits.clearBit(idBits.lastMarkedBit());
+        idBits.clearLastMarkedBit();
     }
 
     Movement& movement = mMovements[mIndex];
@@ -776,7 +760,7 @@
         // We do this on down instead of on up because the client may want to query the
         // final velocity for a pointer that just went up.
         BitSet32 downIdBits;
-        downIdBits.markBit(event->getActionIndex());
+        downIdBits.markBit(event->getPointerId(event->getActionIndex()));
         clearPointers(downIdBits);
         break;
     }
diff --git a/libs/ui/tests/InputEvent_test.cpp b/libs/ui/tests/InputEvent_test.cpp
index e48d5b7..e21c464 100644
--- a/libs/ui/tests/InputEvent_test.cpp
+++ b/libs/ui/tests/InputEvent_test.cpp
@@ -52,9 +52,6 @@
     ASSERT_EQ(0, coords.getAxisValue(1))
             << "getAxisValue should return zero because axis is not present";
 
-    ASSERT_EQ(NULL, coords.editAxisValue(0))
-            << "editAxisValue should return null because axis is not present";
-
     // Set first axis.
     ASSERT_EQ(OK, coords.setAxisValue(1, 5));
     ASSERT_EQ(0x00000002ULL, coords.bits);
@@ -96,26 +93,17 @@
     ASSERT_EQ(2, coords.getAxisValue(3))
             << "getAxisValue should return value of axis";
 
-    // Edit an existing axis value in place.
-    valuePtr = coords.editAxisValue(1);
-    ASSERT_EQ(5, *valuePtr)
-            << "editAxisValue should return pointer to axis value";
-
-    *valuePtr = 7;
-    ASSERT_EQ(7, coords.getAxisValue(1))
-            << "getAxisValue should return value of axis";
-
     // Set an axis with an id between the others.  (inserting value in the middle)
     ASSERT_EQ(OK, coords.setAxisValue(2, 1));
     ASSERT_EQ(0x0000000fULL, coords.bits);
     ASSERT_EQ(4, coords.values[0]);
-    ASSERT_EQ(7, coords.values[1]);
+    ASSERT_EQ(5, coords.values[1]);
     ASSERT_EQ(1, coords.values[2]);
     ASSERT_EQ(2, coords.values[3]);
 
     ASSERT_EQ(4, coords.getAxisValue(0))
             << "getAxisValue should return value of axis";
-    ASSERT_EQ(7, coords.getAxisValue(1))
+    ASSERT_EQ(5, coords.getAxisValue(1))
             << "getAxisValue should return value of axis";
     ASSERT_EQ(1, coords.getAxisValue(2))
             << "getAxisValue should return value of axis";
diff --git a/opengl/libs/EGL/eglApi.cpp b/opengl/libs/EGL/eglApi.cpp
index ba5d29a..10cea22 100644
--- a/opengl/libs/EGL/eglApi.cpp
+++ b/opengl/libs/EGL/eglApi.cpp
@@ -363,6 +363,12 @@
         EGLConfig iConfig = dp->configs[intptr_t(config)].config;
         EGLint format;
 
+        if (native_window_api_connect(window, NATIVE_WINDOW_API_EGL) != OK) {
+            LOGE("EGLNativeWindowType %p already connected to another API",
+                    window);
+            return setError(EGL_BAD_NATIVE_WINDOW, EGL_NO_SURFACE);
+        }
+
         // set the native window's buffers format to match this config
         if (cnx->egl.eglGetConfigAttrib(iDpy,
                 iConfig, EGL_NATIVE_VISUAL_ID, &format)) {
@@ -371,6 +377,7 @@
                 if (err != 0) {
                     LOGE("error setting native window pixel format: %s (%d)",
                             strerror(-err), err);
+                    native_window_api_disconnect(window, NATIVE_WINDOW_API_EGL);
                     return setError(EGL_BAD_NATIVE_WINDOW, EGL_NO_SURFACE);
                 }
             }
@@ -383,6 +390,10 @@
                     dp->configs[intptr_t(config)].impl, cnx);
             return s;
         }
+
+        // EGLSurface creation failed
+        native_window_set_buffers_format(window, 0);
+        native_window_api_disconnect(window, NATIVE_WINDOW_API_EGL);
     }
     return EGL_NO_SURFACE;
 }
@@ -443,8 +454,12 @@
     EGLBoolean result = s->cnx->egl.eglDestroySurface(
             dp->disp[s->impl].dpy, s->surface);
     if (result == EGL_TRUE) {
-        if (s->win != NULL) {
-            native_window_set_buffers_geometry(s->win.get(), 0, 0, 0);
+        ANativeWindow* const window = s->win.get();
+        if (window != NULL) {
+            native_window_set_buffers_format(window, 0);
+            if (native_window_api_disconnect(window, NATIVE_WINDOW_API_EGL)) {
+                LOGE("EGLNativeWindowType %p disconnected failed", window);
+            }
         }
         _s.terminate();
     }
diff --git a/services/surfaceflinger/Android.mk b/services/surfaceflinger/Android.mk
index f67c82e..b178e49 100644
--- a/services/surfaceflinger/Android.mk
+++ b/services/surfaceflinger/Android.mk
@@ -22,7 +22,7 @@
 	LOCAL_CFLAGS += -DNO_RGBX_8888
 endif
 ifeq ($(TARGET_BOARD_PLATFORM), s5pc110)
-	LOCAL_CFLAGS += -DHAS_CONTEXT_PRIORITY
+	LOCAL_CFLAGS += -DHAS_CONTEXT_PRIORITY -DNEVER_DEFAULT_TO_ASYNC_MODE
 endif
 
 
diff --git a/services/surfaceflinger/DisplayHardware/DisplayHardware.cpp b/services/surfaceflinger/DisplayHardware/DisplayHardware.cpp
index 7bf3e0a..f4be168 100644
--- a/services/surfaceflinger/DisplayHardware/DisplayHardware.cpp
+++ b/services/surfaceflinger/DisplayHardware/DisplayHardware.cpp
@@ -40,6 +40,7 @@
 
 #include "GLExtensions.h"
 #include "HWComposer.h"
+#include "SurfaceFlinger.h"
 
 using namespace android;
 
@@ -75,7 +76,7 @@
         const sp<SurfaceFlinger>& flinger,
         uint32_t dpy)
     : DisplayHardwareBase(flinger, dpy),
-      mFlags(0), mHwc(0)
+      mFlinger(flinger), mFlags(0), mHwc(0)
 {
     init(dpy);
 }
@@ -310,7 +311,7 @@
 
 
     // initialize the H/W composer
-    mHwc = new HWComposer();
+    mHwc = new HWComposer(mFlinger);
     if (mHwc->initCheck() == NO_ERROR) {
         mHwc->setFrameBuffer(mDisplay, mSurface);
     }
diff --git a/services/surfaceflinger/DisplayHardware/DisplayHardware.h b/services/surfaceflinger/DisplayHardware/DisplayHardware.h
index cdf89fd..40a6f1e 100644
--- a/services/surfaceflinger/DisplayHardware/DisplayHardware.h
+++ b/services/surfaceflinger/DisplayHardware/DisplayHardware.h
@@ -95,6 +95,7 @@
     void init(uint32_t displayIndex) __attribute__((noinline));
     void fini() __attribute__((noinline));
 
+    sp<SurfaceFlinger> mFlinger;
     EGLDisplay      mDisplay;
     EGLSurface      mSurface;
     EGLContext      mContext;
diff --git a/services/surfaceflinger/DisplayHardware/DisplayHardwareBase.h b/services/surfaceflinger/DisplayHardware/DisplayHardwareBase.h
index 30eb258..3ebc7b6 100644
--- a/services/surfaceflinger/DisplayHardware/DisplayHardwareBase.h
+++ b/services/surfaceflinger/DisplayHardware/DisplayHardwareBase.h
@@ -37,7 +37,7 @@
 
                 ~DisplayHardwareBase();
 
-    // console managment
+    // console management
     void releaseScreen() const;
     void acquireScreen() const;
     bool isScreenAcquired() const;
diff --git a/services/surfaceflinger/DisplayHardware/HWComposer.cpp b/services/surfaceflinger/DisplayHardware/HWComposer.cpp
index 4a3b20d..7d1bdf0 100644
--- a/services/surfaceflinger/DisplayHardware/HWComposer.cpp
+++ b/services/surfaceflinger/DisplayHardware/HWComposer.cpp
@@ -30,12 +30,14 @@
 #include <EGL/egl.h>
 
 #include "HWComposer.h"
+#include "SurfaceFlinger.h"
 
 namespace android {
 // ---------------------------------------------------------------------------
 
-HWComposer::HWComposer()
-    : mModule(0), mHwc(0), mList(0), mCapacity(0),
+HWComposer::HWComposer(const sp<SurfaceFlinger>& flinger)
+    : mFlinger(flinger),
+      mModule(0), mHwc(0), mList(0), mCapacity(0),
       mDpy(EGL_NO_DISPLAY), mSur(EGL_NO_SURFACE)
 {
     int err = hw_get_module(HWC_HARDWARE_MODULE_ID, &mModule);
@@ -44,6 +46,13 @@
         err = hwc_open(mModule, &mHwc);
         LOGE_IF(err, "%s device failed to initialize (%s)",
                 HWC_HARDWARE_COMPOSER, strerror(-err));
+        if (err == 0) {
+            if (mHwc->registerProcs) {
+                mCBContext.hwc = this;
+                mCBContext.procs.invalidate = &hook_invalidate;
+                mHwc->registerProcs(mHwc, &mCBContext.procs);
+            }
+        }
     }
 }
 
@@ -58,6 +67,14 @@
     return mHwc ? NO_ERROR : NO_INIT;
 }
 
+void HWComposer::hook_invalidate(struct hwc_procs* procs) {
+    reinterpret_cast<cb_context *>(procs)->hwc->invalidate();
+}
+
+void HWComposer::invalidate() {
+    mFlinger->signalEvent();
+}
+
 void HWComposer::setFrameBuffer(EGLDisplay dpy, EGLSurface sur) {
     mDpy = (hwc_display_t)dpy;
     mSur = (hwc_surface_t)sur;
diff --git a/services/surfaceflinger/DisplayHardware/HWComposer.h b/services/surfaceflinger/DisplayHardware/HWComposer.h
index 5a9e9eb..983898a 100644
--- a/services/surfaceflinger/DisplayHardware/HWComposer.h
+++ b/services/surfaceflinger/DisplayHardware/HWComposer.h
@@ -24,16 +24,19 @@
 
 #include <hardware/hwcomposer.h>
 
+#include <utils/StrongPointer.h>
+
 namespace android {
 // ---------------------------------------------------------------------------
 
 class String8;
+class SurfaceFlinger;
 
 class HWComposer
 {
 public:
 
-    HWComposer();
+    HWComposer(const sp<SurfaceFlinger>& flinger);
     ~HWComposer();
 
     status_t initCheck() const;
@@ -60,12 +63,21 @@
     void dump(String8& out, char* scratch, size_t SIZE) const;
 
 private:
+    struct cb_context {
+        hwc_procs_t procs;
+        HWComposer* hwc;
+    };
+    static void hook_invalidate(struct hwc_procs* procs);
+    void invalidate();
+
+    sp<SurfaceFlinger>      mFlinger;
     hw_module_t const*      mModule;
     hwc_composer_device_t*  mHwc;
     hwc_layer_list_t*       mList;
     size_t                  mCapacity;
     hwc_display_t           mDpy;
     hwc_surface_t           mSur;
+    cb_context              mCBContext;
 };
 
 
diff --git a/services/surfaceflinger/Layer.cpp b/services/surfaceflinger/Layer.cpp
index 7d6a14d..383c045 100644
--- a/services/surfaceflinger/Layer.cpp
+++ b/services/surfaceflinger/Layer.cpp
@@ -105,6 +105,7 @@
 // in the purgatory list
 void Layer::onRemoved()
 {
+    mSurfaceTexture->abandon();
 }
 
 sp<ISurface> Layer::createSurface()
@@ -171,17 +172,14 @@
 
 void Layer::setGeometry(hwc_layer_t* hwcl)
 {
-    hwcl->compositionType = HWC_FRAMEBUFFER;
-    hwcl->hints = 0;
-    hwcl->flags = 0;
-    hwcl->transform = 0;
-    hwcl->blending = HWC_BLENDING_NONE;
+    LayerBaseClient::setGeometry(hwcl);
+
+    hwcl->flags &= ~HWC_SKIP_LAYER;
 
     // we can't do alpha-fade with the hwc HAL
     const State& s(drawingState());
     if (s.alpha < 0xFF) {
         hwcl->flags = HWC_SKIP_LAYER;
-        return;
     }
 
     /*
@@ -204,26 +202,9 @@
     // we can only handle simple transformation
     if (finalTransform & Transform::ROT_INVALID) {
         hwcl->flags = HWC_SKIP_LAYER;
-        return;
+    } else {
+        hwcl->transform = finalTransform;
     }
-
-    hwcl->transform = finalTransform;
-
-    if (!isOpaque()) {
-        hwcl->blending = mPremultipliedAlpha ?
-                HWC_BLENDING_PREMULT : HWC_BLENDING_COVERAGE;
-    }
-
-    // scaling is already applied in mTransformedBounds
-    hwcl->displayFrame.left   = mTransformedBounds.left;
-    hwcl->displayFrame.top    = mTransformedBounds.top;
-    hwcl->displayFrame.right  = mTransformedBounds.right;
-    hwcl->displayFrame.bottom = mTransformedBounds.bottom;
-
-    hwcl->visibleRegionScreen.rects =
-            reinterpret_cast<hwc_rect_t const *>(
-                    visibleRegionScreen.getArray(
-                            &hwcl->visibleRegionScreen.numRects));
 }
 
 void Layer::setPerFrameData(hwc_layer_t* hwcl) {
@@ -234,9 +215,9 @@
         // HWC handle it.
         hwcl->flags |= HWC_SKIP_LAYER;
         hwcl->handle = NULL;
-        return;
+    } else {
+        hwcl->handle = buffer->handle;
     }
-    hwcl->handle = buffer->handle;
 
     if (isCropped()) {
         hwcl->sourceCrop.left   = mCurrentCrop.left;
@@ -246,8 +227,13 @@
     } else {
         hwcl->sourceCrop.left   = 0;
         hwcl->sourceCrop.top    = 0;
-        hwcl->sourceCrop.right  = buffer->width;
-        hwcl->sourceCrop.bottom = buffer->height;
+        if (buffer != NULL) {
+            hwcl->sourceCrop.right  = buffer->width;
+            hwcl->sourceCrop.bottom = buffer->height;
+        } else {
+            hwcl->sourceCrop.right  = mTransformedBounds.width();
+            hwcl->sourceCrop.bottom = mTransformedBounds.height();
+        }
     }
 }
 
@@ -326,8 +312,9 @@
 {
     // if we don't have a buffer yet, we're translucent regardless of the
     // layer's opaque flag.
-    if (mActiveBuffer == 0)
+    if (mActiveBuffer == 0) {
         return false;
+    }
 
     // if the layer has the opaque flag, then we're always opaque,
     // otherwise we use the current buffer's format.
@@ -411,6 +398,8 @@
 void Layer::lockPageFlip(bool& recomputeVisibleRegions)
 {
     if (mQueuedFrames > 0) {
+        const bool oldOpacity = isOpaque();
+
         // signal another event if we have more frames pending
         if (android_atomic_dec(&mQueuedFrames) > 1) {
             mFlinger->signalEvent();
@@ -438,9 +427,8 @@
             mFlinger->invalidateHwcGeometry();
         }
 
-        const bool opacity(getOpacityForFormat(mActiveBuffer->format));
-        if (opacity != mCurrentOpacity) {
-            mCurrentOpacity = opacity;
+        mCurrentOpacity = getOpacityForFormat(mActiveBuffer->format);
+        if (oldOpacity != isOpaque()) {
             recomputeVisibleRegions = true;
         }
 
diff --git a/services/surfaceflinger/LayerBase.cpp b/services/surfaceflinger/LayerBase.cpp
index c86c659..e04c533 100644
--- a/services/surfaceflinger/LayerBase.cpp
+++ b/services/surfaceflinger/LayerBase.cpp
@@ -302,13 +302,47 @@
     }
 }
 
-void LayerBase::setGeometry(hwc_layer_t* hwcl) {
-    hwcl->flags |= HWC_SKIP_LAYER;
+void LayerBase::setGeometry(hwc_layer_t* hwcl)
+{
+    hwcl->compositionType = HWC_FRAMEBUFFER;
+    hwcl->hints = 0;
+    hwcl->flags = HWC_SKIP_LAYER;
+    hwcl->transform = 0;
+    hwcl->blending = HWC_BLENDING_NONE;
+
+    // this gives us only the "orientation" component of the transform
+    const State& s(drawingState());
+    const uint32_t finalTransform = s.transform.getOrientation();
+    // we can only handle simple transformation
+    if (finalTransform & Transform::ROT_INVALID) {
+        hwcl->flags = HWC_SKIP_LAYER;
+    } else {
+        hwcl->transform = finalTransform;
+    }
+
+    if (!isOpaque()) {
+        hwcl->blending = mPremultipliedAlpha ?
+                HWC_BLENDING_PREMULT : HWC_BLENDING_COVERAGE;
+    }
+
+    // scaling is already applied in mTransformedBounds
+    hwcl->displayFrame.left   = mTransformedBounds.left;
+    hwcl->displayFrame.top    = mTransformedBounds.top;
+    hwcl->displayFrame.right  = mTransformedBounds.right;
+    hwcl->displayFrame.bottom = mTransformedBounds.bottom;
+    hwcl->visibleRegionScreen.rects =
+            reinterpret_cast<hwc_rect_t const *>(
+                    visibleRegionScreen.getArray(
+                            &hwcl->visibleRegionScreen.numRects));
 }
 
 void LayerBase::setPerFrameData(hwc_layer_t* hwcl) {
     hwcl->compositionType = HWC_FRAMEBUFFER;
     hwcl->handle = NULL;
+    hwcl->sourceCrop.left   = 0;
+    hwcl->sourceCrop.top    = 0;
+    hwcl->sourceCrop.right  = mTransformedBounds.width();
+    hwcl->sourceCrop.bottom = mTransformedBounds.height();
 }
 
 void LayerBase::setFiltering(bool filtering)
diff --git a/services/surfaceflinger/SurfaceTextureLayer.cpp b/services/surfaceflinger/SurfaceTextureLayer.cpp
index 91e010f..5973e76 100644
--- a/services/surfaceflinger/SurfaceTextureLayer.cpp
+++ b/services/surfaceflinger/SurfaceTextureLayer.cpp
@@ -86,6 +86,32 @@
     return res;
 }
 
+status_t SurfaceTextureLayer::connect(int api) {
+    status_t err = SurfaceTexture::connect(api);
+    if (err == NO_ERROR) {
+        switch(api) {
+            case NATIVE_WINDOW_API_MEDIA:
+            case NATIVE_WINDOW_API_CAMERA:
+                // Camera preview and videos are rate-limited on the producer
+                // side.  If enabled for this build, we use async mode to always
+                // show the most recent frame at the cost of requiring an
+                // additional buffer.
+#ifndef NEVER_DEFAULT_TO_ASYNC_MODE
+                err = setSynchronousMode(false);
+                break;
+#endif
+                // fall through to set synchronous mode when not defaulting to
+                // async mode.
+            deafult:
+                err = setSynchronousMode(true);
+                break;
+        }
+        if (err != NO_ERROR) {
+            disconnect(api);
+        }
+    }
+    return err;
+}
 
 // ---------------------------------------------------------------------------
 }; // namespace android
diff --git a/services/surfaceflinger/SurfaceTextureLayer.h b/services/surfaceflinger/SurfaceTextureLayer.h
index 29a9cbe..5d328b7 100644
--- a/services/surfaceflinger/SurfaceTextureLayer.h
+++ b/services/surfaceflinger/SurfaceTextureLayer.h
@@ -50,6 +50,8 @@
 
     virtual status_t dequeueBuffer(int *buf, uint32_t w, uint32_t h,
             uint32_t format, uint32_t usage);
+
+    virtual status_t connect(int api);
 };
 
 // ---------------------------------------------------------------------------