commit 14d41a86b229c3fdf1e7acc6c504540e3b948e42
author Jeykumar Sankaran <jsanka@codeaurora.org> Wed Mar 11 14:13:43 2015 -0700
committer Krishna Chaitanya Parimi <cparimi@codeaurora.org> Wed Mar 11 15:43:44 2015 -0700
tree 0383affb01c016d6260c57635d2df0091a6d56cf
parent 51c08146fd7e43944a06ac1e99a35e3b883881bd

libqservice: Defer enabling partial update PP turns off

When client prefer to enable PU(partial update) over PP(post
processing), delay enabling PU until PP turns off its
features completely. This change introduces hand shaking flags
between PP and HWC through binder calls. When requested to turn
on PU, we notify PP through the sys_fs node. When PP is done
shutting off it features, it acknowledges back to HWC to actually
turn on PU.

Change-Id: I72008f2313b93497f55c0435367ef62cd772c2c4

libhwcomposer/hwc_qclient.cpp

diff --git a/libhwcomposer/hwc_qclient.cpp b/libhwcomposer/hwc_qclient.cpp
index 487ec77..1e55715 100644
--- a/libhwcomposer/hwc_qclient.cpp
+++ b/libhwcomposer/hwc_qclient.cpp
@@ -313,11 +313,25 @@
     }
 }
 
-static status_t setPartialUpdatePref(hwc_context_t *ctx, uint32_t enable) {
-    ALOGD("%s: enable: %d", __FUNCTION__, enable);
-    if(qhwc::MDPComp::setPartialUpdatePref(ctx, (bool)enable) < 0)
-        return NO_INIT;
-    return NO_ERROR;
+static status_t setPartialUpdateState(hwc_context_t *ctx, uint32_t state) {
+    ALOGD("%s: state: %d", __FUNCTION__, state);
+    switch(state) {
+        case IQService::PREF_PARTIAL_UPDATE:
+            if(qhwc::MDPComp::setPartialUpdatePref(ctx, true) < 0)
+                return NO_INIT;
+            return NO_ERROR;
+        case IQService::PREF_POST_PROCESSING:
+            if(qhwc::MDPComp::setPartialUpdatePref(ctx, false) < 0)
+                return NO_INIT;
+            qhwc::MDPComp::enablePartialUpdate(false);
+            return NO_ERROR;
+        case IQService::ENABLE_PARTIAL_UPDATE:
+            qhwc::MDPComp::enablePartialUpdate(true);
+            return NO_ERROR;
+        default:
+            ALOGE("%s: Invalid state", __FUNCTION__);
+            return NO_ERROR;
+    };
 }
 
 static void toggleScreenUpdate(hwc_context_t* ctx, uint32_t on) {
@@ -404,7 +418,7 @@
             setMaxPipesPerMixer(mHwcContext, inParcel);
             break;
         case IQService::SET_PARTIAL_UPDATE:
-            ret = setPartialUpdatePref(mHwcContext, inParcel->readInt32());
+            ret = setPartialUpdateState(mHwcContext, inParcel->readInt32());
             break;
         case IQService::TOGGLE_BWC:
             toggleBWC(mHwcContext, inParcel);