SurfaceFlinger: Add support for MDP3

This change is porting of following commits related to MDP3

1) SurfaceFlinger: Change to support framebuffer flip for 2D blitters
- Surfaceflinger does not flip framebuffers when there are
  no layers marked for HWC_FRAMEBUFFER
- This change checks for the HWC_BLIT flag and will request a flip
  to a new FB_TARGET buffer even if there are no FRAMEBUFFER layers

  "Change-Id: I1cb44389a05c9ec049d7f0d39c288feccb11a91c"

2) SF: Avoid wormhole clear for BLIT calls
- Do not call GPU clear from SF when composition
  type is BLIT as it'll be taken care in HAL.

  "Change-Id: Ia613eb9b824c6484ecc8c8fa4ee883545d8541b8"

3) surfaceflinger: Allow gpu to render widevine level3
- Allow gpu to render widevine level3 but keep
  blocking screen shots.

  "Change-Id: I914232a062acbb7b17901dbf2b414973230e59d9"

Change-Id: I35eef9eb1597af21c195e07d5fe4c0c73ab3a269

services/surfaceflinger/Android.mk

@@ -113,6 +113,7 @@ LOCAL_C_INCLUDES += $(ANDROID_BUILD_TOP)/vendor/qcom/opensource/display-framewor
 ifeq ($(TARGET_USES_QCOM_BSP), true)
     LOCAL_C_INCLUDES += hardware/qcom/display/libgralloc
     LOCAL_C_INCLUDES += hardware/qcom/display/libqdutils
+    LOCAL_C_INCLUDES += vendor/qcom/opensource/display-frameworks/include
     LOCAL_SHARED_LIBRARIES += libqdutils
     LOCAL_CFLAGS += -DQTI_BSP
 endif

services/surfaceflinger/DisplayHardware/HWComposer.cpp

@@ -707,6 +707,9 @@ status_t HWComposer::prepare() {
                     if (l.compositionType == HWC_OVERLAY) {
                         disp.hasOvComp = true;
                     }
+                    if (isCompositionTypeBlit(l.compositionType)) {
+                        disp.hasFbComp = true;
+                    }
                     if (l.compositionType == HWC_CURSOR_OVERLAY) {
                         disp.hasOvComp = true;
                     }
@@ -1242,7 +1245,7 @@ void HWComposer::dump(String8& result) const {
                     if (hwcHasApiVersion(mHwc, HWC_DEVICE_API_VERSION_1_3)) {
                         result.appendFormat(
                                 " %9s | %08" PRIxPTR " | %04x | %04x | %02x | %04x | %-11s |%7.1f,%7.1f,%7.1f,%7.1f |%5d,%5d,%5d,%5d | %s\n",
-                                        compositionTypeName[type],
+                                        (isCompositionTypeBlit(l.compositionType)) ? "HWC_BLIT" : compositionTypeName[type],
                                         intptr_t(l.handle), l.hints, l.flags, l.transform, l.blending, formatStr.string(),
                                         l.sourceCropf.left, l.sourceCropf.top, l.sourceCropf.right, l.sourceCropf.bottom,
                                         l.displayFrame.left, l.displayFrame.top, l.displayFrame.right, l.displayFrame.bottom,
@@ -1250,7 +1253,7 @@ void HWComposer::dump(String8& result) const {
                     } else {
                         result.appendFormat(
                                 " %9s | %08" PRIxPTR " | %04x | %04x | %02x | %04x | %-11s |%7d,%7d,%7d,%7d |%5d,%5d,%5d,%5d | %s\n",
-                                        compositionTypeName[type],
+                                        (isCompositionTypeBlit(l.compositionType)) ? "HWC_BLIT" : compositionTypeName[type],
                                         intptr_t(l.handle), l.hints, l.flags, l.transform, l.blending, formatStr.string(),
                                         l.sourceCrop.left, l.sourceCrop.top, l.sourceCrop.right, l.sourceCrop.bottom,
                                         l.displayFrame.left, l.displayFrame.top, l.displayFrame.right, l.displayFrame.bottom,

services/surfaceflinger/DisplayHardware/HWComposer.h

@@ -312,6 +312,9 @@ public:
      * Extensions
      */
     virtual inline bool isVDSEnabled() const { return true; };
+    virtual inline bool isCompositionTypeBlit(const int32_t /*compType*/) const {
+            return false;
+    };
 
 private:
     void loadHwcModule();

services/surfaceflinger/Layer.cpp

@@ -579,6 +579,7 @@ void Layer::setAcquireFence(const sp<const DisplayDevice>& /* hw */,
             }
         }
     }
+    setAcquiredFenceIfBlit(fenceFd, layer);
     layer.setAcquireFenceFd(fenceFd);
 }
 
@@ -665,7 +666,7 @@ void Layer::onDraw(const sp<const DisplayDevice>& hw, const Region& clip,
 
     RenderEngine& engine(mFlinger->getRenderEngine());
 
-    if (!blackOutLayer) {
+    if (!blackOutLayer || canAllowGPUForProtected()) {
         // TODO: we could be more subtle with isFixedSize()
         const bool useFiltering = getFiltering() || needsFiltering(hw) || isFixedSize();
 

services/surfaceflinger/Layer.h

@@ -296,6 +296,10 @@ public:
     virtual void setPosition(const sp<const DisplayDevice>& /*hw*/,
                              HWComposer::HWCLayerInterface& /*layer*/,
                              const State& /*state*/) { }
+    virtual void setAcquiredFenceIfBlit(int& /*fenceFd */,
+                       HWComposer::HWCLayerInterface& /*layer */) { }
+    virtual bool canAllowGPUForProtected() const { return false; }
+
 
     /*
      * returns the rectangle that crops the content of the layer and scales it

services/surfaceflinger/SurfaceFlinger.cpp

@@ -1957,7 +1957,7 @@ bool SurfaceFlinger::doComposeSurfaces(const sp<const DisplayDevice>& hw, const
             // screen is already cleared here
             if (!region.isEmpty()) {
                 // can happen with SurfaceView
-                drawWormhole(hw, region);
+                drawWormHoleIfRequired(cur, end, hw, region);
             }
         }
 
@@ -3534,6 +3534,13 @@ bool SurfaceFlinger::canDrawLayerinScreenShot(
     return layer->isVisible();
 }
 
+void SurfaceFlinger::drawWormHoleIfRequired(HWComposer::LayerListIterator& /*cur*/,
+        const HWComposer::LayerListIterator& /*end*/,
+        const sp<const DisplayDevice>& hw,
+        const Region& region) {
+    drawWormhole(hw, region);
+}
+
 // ---------------------------------------------------------------------------
 
 SurfaceFlinger::LayerVector::LayerVector() {

services/surfaceflinger/SurfaceFlinger.h

@@ -269,6 +269,11 @@ private:
                      const int32_t& /*id*/) { }
 
     virtual void updateVisibleRegionsDirty() { }
+
+    virtual void  drawWormHoleIfRequired(HWComposer::LayerListIterator &cur,
+        const HWComposer::LayerListIterator &end,
+        const sp<const DisplayDevice>& hw,
+        const Region& region);
     /* ------------------------------------------------------------------------
      * Message handling
      */