commit 67a38c356572a3e994d0d0f79dd2741d0204f217
author Saurabh Shah <saurshah@codeaurora.org> Mon Jun 10 16:23:15 2013 -0700
committer Gerrit - the friendly Code Review server <code-review@localhost> Mon Jul 01 14:55:06 2013 -0700
tree b075957f965b814e1cb32d1f4477b4406cec059d
parent 34e8b811741eca50a0a34f4fed0de3a1e217131d

hwc: Add support for uneven split primary displays

Add support for unevenly split primary displays.
The driver provides info about the split via msm_fb_split sysfs node

For external we assume even split. If driver doesn't specify any split
for primary, we default to even split.

Change-Id: I4d541f41de2d7a5d2b62653fa33cab079a6d5d30

libqdutils/mdp_version.cpp

diff --git a/libqdutils/mdp_version.cpp b/libqdutils/mdp_version.cpp
index cac6b1d..16aee07 100644
--- a/libqdutils/mdp_version.cpp
+++ b/libqdutils/mdp_version.cpp
@@ -101,8 +101,8 @@
             ptype = fb_finfo.id;
         }
         panel_type = *ptype;
-
     }
+    mPanelType = panel_type;
     close(fb_fd);
     mMDPVersion = mdp_version;
     mHasOverlay = false;
@@ -113,9 +113,26 @@
     if(mMDPVersion >= MDSS_V5) {
         //TODO get this from driver
         mMDPDownscale = 4;
-    }
 
-    mPanelType = panel_type;
+        char split[64];
+        FILE* fp = fopen("/sys/class/graphics/fb0/msm_fb_split", "r");
+        if(fp){
+            //Format "left right" space as delimiter
+            if(fread(split, sizeof(char), 64, fp)) {
+                mSplit.mLeft = atoi(split);
+                ALOGI_IF(mSplit.mLeft, "Left Split=%d", mSplit.mLeft);
+                char *rght = strpbrk(split, " ");
+                if(rght)
+                    mSplit.mRight = atoi(rght + 1);
+                ALOGI_IF(rght, "Right Split=%d", mSplit.mRight);
+            }
+        } else {
+            ALOGE("Failed to open mdss_fb_split node");
+        }
+
+        if(fp)
+            fclose(fp);
+    }
 }
 
 bool MDPVersion::supportsDecimation() {

libqdutils/mdp_version.h

diff --git a/libqdutils/mdp_version.h b/libqdutils/mdp_version.h
index f7b16fa..e26f4d3 100644
--- a/libqdutils/mdp_version.h
+++ b/libqdutils/mdp_version.h
@@ -74,6 +74,16 @@
 #define WRITEBACK_PANEL  'a'
 #define LVDS_PANEL       'b'
 
+class MDPVersion;
+
+struct Split {
+    int mLeft;
+    int mRight;
+    Split() : mLeft(0), mRight(0){}
+    int left() { return mLeft; }
+    int right() { return mRight; }
+    friend class MDPVersion;
+};
 
 class MDPVersion : public Singleton <MDPVersion>
 {
@@ -91,6 +101,8 @@
     uint32_t getMaxMDPDownscale();
     bool supportsBWC();
     bool is8x26();
+    int getLeftSplit() { return mSplit.left(); }
+    int getRightSplit() { return mSplit.right(); }
 private:
     int mMDPVersion;
     char mPanelType;
@@ -101,6 +113,7 @@
     uint8_t mDMAPipes;
     uint32_t mFeatures;
     uint32_t mMDPDownscale;
+    Split mSplit;
 };
 }; //namespace qdutils
 #endif //INCLUDE_LIBQCOMUTILS_MDPVER