commit da6152a5a57cf78cef01ee4ba2e695048f161231
author Naseer Ahmed <naseer@codeaurora.org> Tue Oct 15 11:56:14 2013 -0400
committer Vineeta Srivastava <vsrivastava@google.com> Thu Oct 17 12:58:30 2013 -0700
tree ebea07ef137e35131dda55be92576a5758cc7498
parent b5199b08a351177e2d572b29d04f5a05069b3c2a

hwc: Enable rotator during resolution change.

MDP VG pipe framesize register is not double bufferred.
It introduces corrupted frame during resolution change especially when
rotator is not used. Enable rotator to handle the transition case.

Change-Id: Ifec55fee0c762dfb12a09580b80dca6f051a1c86
Acked-by: Ramkumar Radhakrishnan <ramkumar@codeaurora.org>

msm8960/libhwcomposer/hwc_utils.cpp

diff --git a/msm8960/libhwcomposer/hwc_utils.cpp b/msm8960/libhwcomposer/hwc_utils.cpp
index d2cf697..97acb37 100644
--- a/msm8960/libhwcomposer/hwc_utils.cpp
+++ b/msm8960/libhwcomposer/hwc_utils.cpp
@@ -943,6 +943,7 @@
     int rotFlags = ovutils::ROT_FLAGS_NONE;
     Whf whf(getWidth(hnd), getHeight(hnd),
             getMdpFormat(hnd->format), hnd->size);
+    bool forceRot = false;
 
     if(isYuvBuffer(hnd) && ctx->mMDP.version >= qdutils::MDP_V4_2 &&
        ctx->mMDP.version < qdutils::MDSS_V5) {
@@ -954,13 +955,24 @@
         if(downscale) {
             rotFlags = ROT_DOWNSCALE_ENABLED;
         }
+        unsigned int& prevWidth = ctx->mPrevWHF[dpy].w;
+        unsigned int& prevHeight = ctx->mPrevWHF[dpy].h;
+        if(prevWidth != (uint32_t)getWidth(hnd) ||
+               prevHeight != (uint32_t)getHeight(hnd)) {
+            uint32_t prevBufArea = (prevWidth * prevHeight);
+            if(prevBufArea) {
+                forceRot = true;
+            }
+            prevWidth = (uint32_t)getWidth(hnd);
+            prevHeight = (uint32_t)getHeight(hnd);
+        }
     }
 
     setMdpFlags(layer, mdpFlags, downscale);
     trimLayer(ctx, dpy, transform, crop, dst);
 
     if(isYuvBuffer(hnd) && //if 90 component or downscale, use rot
-            ((transform & HWC_TRANSFORM_ROT_90) || downscale)) {
+            ((transform & HWC_TRANSFORM_ROT_90) || downscale || forceRot)) {
         *rot = ctx->mRotMgr->getNext();
         if(*rot == NULL) return -1;
         //Configure rotator for pre-rotation

msm8960/libhwcomposer/hwc_utils.h

diff --git a/msm8960/libhwcomposer/hwc_utils.h b/msm8960/libhwcomposer/hwc_utils.h
index 6b32ec5..6fd14c4 100644
--- a/msm8960/libhwcomposer/hwc_utils.h
+++ b/msm8960/libhwcomposer/hwc_utils.h
@@ -321,6 +321,7 @@
     qhwc::LayerRotMap *mLayerRotMap[MAX_DISPLAYS];
     qhwc::MDPComp *mMDPComp[MAX_DISPLAYS];
     qhwc::CablProp mCablProp;
+    overlay::utils::Whf mPrevWHF[MAX_DISPLAYS];
 
     //Securing in progress indicator
     bool mSecuring;