commit defd352e101adc8c419e1081670177295075cb05
author Sushil Chauhan <sushilchauhan@codeaurora.org> Tue May 13 18:17:12 2014 -0700
committer Sushil Chauhan <sushilchauhan@codeaurora.org> Fri May 30 13:59:16 2014 -0700
tree 38cd6ed603b49bbd76abd7e3bf4b18f3664e70c5
parent 444a423021462c560af3d77c27e6c824ed4d0640

hwc: Full MDP Composition mode with overlap region removal

MDP bandwidth limitations can be avoided, if the overlapping region
covered by the smallest layer at a higher z-order, can be composed
on a render buffer using Copybit, and then it can be queued to MDP
along with other layers. It helps to improve performace by avoiding
GPU Composition in use cases like Home Screen pan. To enable this
feature, set system prop "persist.hwc.ptor.enable" to "true" or '1'
and enable Copybit HAL compilation.

Change-Id: Ib719d3dd42477837519518cc427f1b95356c28f7

libhwcomposer/hwc_utils.cpp

diff --git a/libhwcomposer/hwc_utils.cpp b/libhwcomposer/hwc_utils.cpp
index 18ae28f..09600e2 100644
--- a/libhwcomposer/hwc_utils.cpp
+++ b/libhwcomposer/hwc_utils.cpp
@@ -1358,6 +1358,11 @@
         }
     }
 
+    if ((fd >= 0) && !dpy && ctx->mMDPComp[dpy]->isPTORActive()) {
+        // Acquire c2d fence of Overlap render buffer
+        acquireFd[count++] = fd;
+    }
+
     data.acq_fen_fd_cnt = count;
     fbFd = ctx->dpyAttr[dpy].fd;
 
@@ -1418,8 +1423,12 @@
         fd = -1;
     }
 
-    if (ctx->mCopyBit[dpy])
-        ctx->mCopyBit[dpy]->setReleaseFd(releaseFd);
+    if (!dpy && ctx->mCopyBit[dpy]) {
+        if (ctx->mMDPComp[dpy]->isPTORActive())
+            ctx->mCopyBit[dpy]->setReleaseFdSync(releaseFd);
+        else
+            ctx->mCopyBit[dpy]->setReleaseFd(releaseFd);
+    }
 
     //Signals when MDP finishes reading rotator buffers.
     ctx->mLayerRotMap[dpy]->setReleaseFd(releaseFd);
@@ -2143,6 +2152,20 @@
 #endif
 }
 
+bool isPeripheral(const hwc_rect_t& rect1, const hwc_rect_t& rect2) {
+    // To be peripheral, 3 boundaries should match.
+    uint8_t eqBounds = 0;
+    if (rect1.left == rect2.left)
+        eqBounds++;
+    if (rect1.top == rect2.top)
+        eqBounds++;
+    if (rect1.right == rect2.right)
+        eqBounds++;
+    if (rect1.bottom == rect2.bottom)
+        eqBounds++;
+    return (eqBounds == 3);
+}
+
 void BwcPM::setBwc(const hwc_rect_t& crop,
             const hwc_rect_t& dst, const int& transform,
             ovutils::eMdpFlags& mdpFlags) {