commit 4070e93e1e17945f9e5b5f69bce5bf78ba852e4d
author Dileep Kumar Reddi <dkumarre@codeaurora.org> Tue Sep 30 09:00:57 2014 +0530
committer Gerrit - the friendly Code Review server <code-review@localhost> Wed Oct 08 01:08:56 2014 -0700
tree 108222e19831e7ffa2ce0e39c21f91d39706c30d
parent dd9101aec9318c78bb0fbadb28dc4a027ab9847f

hwc: Partial Update for MDP3 targets

Enable partial update for MDP3 targets.
Use computed ROI of mdpcomp in copybit
to avoid composition of layers outside ROI.

Change-Id: I4b23fd48cac814f8c35a3c01253dca8c297036f9

libhwcomposer/hwc_mdpcomp.cpp

diff --git a/libhwcomposer/hwc_mdpcomp.cpp b/libhwcomposer/hwc_mdpcomp.cpp
index bf764e6..5c913e6 100644
--- a/libhwcomposer/hwc_mdpcomp.cpp
+++ b/libhwcomposer/hwc_mdpcomp.cpp
@@ -46,6 +46,7 @@
 int MDPComp::sMaxPipesPerMixer = MAX_PIPES_PER_MIXER;
 bool MDPComp::sEnableYUVsplit = false;
 bool MDPComp::sSrcSplitEnabled = false;
+bool MDPComp::enablePartialUpdateForMDP3 = false;
 MDPComp* MDPComp::getObject(hwc_context_t *ctx, const int& dpy) {
     if(qdutils::MDPVersion::getInstance().isSrcSplit()) {
         sSrcSplitEnabled = true;
@@ -156,6 +157,17 @@
                                                     HWC_DISPLAY_PRIMARY);
     }
 
+    if((property_get("persist.mdp3.partialUpdate", property, NULL) <= 0) &&
+          (ctx->mMDP.version == qdutils::MDP_V3_0_5)) {
+       enablePartialUpdateForMDP3 = true;
+    }
+
+    if(!enablePartialUpdateForMDP3 &&
+          (!strncmp(property, "1", PROPERTY_VALUE_MAX ) ||
+           (!strncasecmp(property,"true", PROPERTY_VALUE_MAX )))) {
+       enablePartialUpdateForMDP3 = true;
+    }
+
     return true;
 }
 
@@ -1870,6 +1882,13 @@
                     "MDP Composition Strategies Failed");
         }
     } else {
+        if ((ctx->mMDP.version == qdutils::MDP_V3_0_5) && ctx->mCopyBit[mDpy] &&
+                enablePartialUpdateForMDP3) {
+            generateROI(ctx, list);
+            for(int i = 0; i < ctx->listStats[mDpy].numAppLayers; i++) {
+                ctx->copybitDrop[i] = mCurrentFrame.drop[i];
+            }
+        }
         ALOGD_IF( isDebug(),"%s: MDP Comp not possible for this frame",
                 __FUNCTION__);
         ret = -1;