commit 467759fb28d1a7764fc7291ec52071b07fb7b84d
author Ramakant Singh <ramaka@codeaurora.org> Wed Apr 16 11:09:40 2014 +0530
committer Sravan Kumar D.V.N <sravank1@codeaurora.org> Mon May 26 13:59:22 2014 +0530
tree 27c4a9b4e6d490435b058e95425dcd14ecb7b80e
parent 0def28c653ec1f0b10153a0252a004a047d774e9

hwc : Add support for ABC in MDP3

In display list if one layer has same parameters
as framebuffer on index '0'. Use this layer
as FB and blit other layer(s) on top of it.

Change-Id: If38712781f24a2e27686d2b370643f51a9b05358

libhwcomposer/hwc_copybit.cpp

diff --git a/libhwcomposer/hwc_copybit.cpp b/libhwcomposer/hwc_copybit.cpp
index 2cd2d2a..1df8635 100644
--- a/libhwcomposer/hwc_copybit.cpp
+++ b/libhwcomposer/hwc_copybit.cpp
@@ -342,16 +342,16 @@
 
 bool CopyBit::drawUsingAppBufferComposition(hwc_context_t *ctx,
                                       hwc_display_contents_1_t *list,
-                                      int dpy) {
-    int layerCount = 0;
-    uint32_t last = list->numHwLayers - 1;
-    hwc_layer_1_t *fbLayer = &list->hwLayers[last];
-    private_handle_t *fbhnd = (private_handle_t *)fbLayer->handle;
+                                      int dpy, int *copybitFd) {
+     int layerCount = 0;
+     uint32_t last = list->numHwLayers - 1;
+     hwc_layer_1_t *fbLayer = &list->hwLayers[last];
+     private_handle_t *fbhnd = (private_handle_t *)fbLayer->handle;
 
     if(ctx->enableABC == false)
        return false;
 
-    if(ctx->listStats[dpy].numAppLayers != MAX_LAYERS_FOR_ABC )
+    if(ctx->listStats[dpy].numAppLayers > MAX_LAYERS_FOR_ABC )
        return false;
 
     layerCount = ctx->listStats[dpy].numAppLayers;
@@ -371,9 +371,33 @@
        }
     }
 
-    if(ctx->listStats[dpy].renderBufIndexforABC == 0){
+    if(ctx->listStats[dpy].renderBufIndexforABC == 0) {
+       if(layerCount == 1)
           return true;
-    // Todo::same for two layers.
+
+       if(layerCount == MAX_LAYERS_FOR_ABC) {
+          // Pass the Acquire Fence FD to driver for base layer
+          int abcRenderBufIdx = ctx->listStats[dpy].renderBufIndexforABC;
+          private_handle_t *renderBuffer =
+          (private_handle_t *)list->hwLayers[abcRenderBufIdx].handle;
+          copybit_device_t *copybit = getCopyBitDevice();
+          if(list->hwLayers[abcRenderBufIdx].acquireFenceFd >=0){
+             copybit->set_sync(copybit,
+             list->hwLayers[abcRenderBufIdx].acquireFenceFd);
+          }
+          for(int i = 1; i < layerCount; i++){
+             int retVal = drawLayerUsingCopybit(ctx,
+               &(list->hwLayers[i]),renderBuffer, 0);
+             if(retVal < 0) {
+                ALOGE("%s : Copybit failed", __FUNCTION__);
+             }
+          }
+          // Get Release Fence FD of copybit for the App layer(s)
+          copybit->flush_get_fence(copybit, copybitFd);
+          close(list->hwLayers[abcRenderBufIdx].acquireFenceFd);
+          list->hwLayers[abcRenderBufIdx].acquireFenceFd = -1;
+          return true;
+       }
     }
     return false;
 }
@@ -392,7 +416,7 @@
        return false ;
     }
 
-    if(drawUsingAppBufferComposition(ctx, list, dpy)) {
+    if(drawUsingAppBufferComposition(ctx, list, dpy, fd)) {
        return true;
     }
     //render buffer