commit 8bb8f9de3b3f4efc2dfc9d2fbf572685ba0f5926
author Naseer Ahmed <naseer@codeaurora.org> Sat May 11 07:29:45 2013 -0400
committer Naseer Ahmed <naseer@codeaurora.org> Mon May 13 17:38:26 2013 -0400
tree ad7953967038fe0f27243268b7065ec7eff8b3ce
parent 330067c2ef5f69648a2e9d3be383f3f4394bcbea

hwc: Simplify vsync code

Handle the wait properly in the kernel and remove unnecessary
thread signaling.

Change-Id: Iff05825a7a85d0353f3feb64e7f9a06cedab7869

libhwcomposer/hwc.cpp

diff --git a/libhwcomposer/hwc.cpp b/libhwcomposer/hwc.cpp
index 7398295..c5a864e 100644
--- a/libhwcomposer/hwc.cpp
+++ b/libhwcomposer/hwc.cpp
@@ -233,23 +233,20 @@
 {
     int ret = 0;
     hwc_context_t* ctx = (hwc_context_t*)(dev);
-    pthread_mutex_lock(&ctx->vstate.lock);
+    Locker::Autolock _l(ctx->mBlankLock);
     switch(event) {
         case HWC_EVENT_VSYNC:
             if (ctx->vstate.enable == enable)
                 break;
             ret = hwc_vsync_control(ctx, dpy, enable);
-            if(ret == 0) {
+            if(ret == 0)
                 ctx->vstate.enable = !!enable;
-                pthread_cond_signal(&ctx->vstate.cond);
-            }
             ALOGD_IF (VSYNC_DEBUG, "VSYNC state changed to %s",
                       (enable)?"ENABLED":"DISABLED");
             break;
         default:
             ret = -EINVAL;
     }
-    pthread_mutex_unlock(&ctx->vstate.lock);
     return ret;
 }