commit 6c7eeac178b3b060a4a4701d9aa7ef09c5505a84
author Jeykumar Sankaran <jsanka@codeaurora.org> Mon Nov 18 11:19:45 2013 -0800
committer Jeykumar Sankaran <jsanka@codeaurora.org> Wed May 14 17:45:24 2014 -0700
tree 884c77dc910ac8b079e70cac5b15f44e1c653ecf
parent 9c0fe9145565c41dd749c12f131606c71626474f

hwc: Extend partial frame update for split displays

Extends partial frame update support for split displays by calculating
changing region(ROI) independently for each half of the screen. In case of
only one half updating, display driver shuts down the DSI/MDP mixer control
of the non updating half.

Maintains two ROI's for each display. In case of Non-split
displays, only left ROI is updated.

Change-Id: I8a67fe40aac665a48b6f8a46beffb9f8027851b2

libhwcomposer/hwc.cpp

diff --git a/libhwcomposer/hwc.cpp b/libhwcomposer/hwc.cpp
index 0396c91..237cd39 100644
--- a/libhwcomposer/hwc.cpp
+++ b/libhwcomposer/hwc.cpp
@@ -604,8 +604,20 @@
             }
         }
 
-        if(!Overlay::displayCommit(ctx->dpyAttr[dpy].fd,
-                                            ctx->listStats[dpy].roi)) {
+        int lSplit = getLeftSplit(ctx, dpy);
+        qhwc::ovutils::Dim lRoi = qhwc::ovutils::Dim {
+            ctx->listStats[dpy].lRoi.left,
+            ctx->listStats[dpy].lRoi.top,
+            ctx->listStats[dpy].lRoi.right - ctx->listStats[dpy].lRoi.left,
+            ctx->listStats[dpy].lRoi.bottom - ctx->listStats[dpy].lRoi.top };
+
+        qhwc::ovutils::Dim rRoi = qhwc::ovutils::Dim {
+            ctx->listStats[dpy].rRoi.left - lSplit,
+            ctx->listStats[dpy].rRoi.top,
+            ctx->listStats[dpy].rRoi.right - ctx->listStats[dpy].rRoi.left,
+            ctx->listStats[dpy].rRoi.bottom - ctx->listStats[dpy].rRoi.top };
+
+        if(!Overlay::displayCommit(ctx->dpyAttr[dpy].fd, lRoi, rRoi)) {
             ALOGE("%s: display commit fail for %d dpy!", __FUNCTION__, dpy);
             ret = -1;
         }