commit aeab91f9777e8e0b7ac85c7569514ce7fb80af66
author Naseer Ahmed <naseer@codeaurora.org> Wed Mar 20 21:01:19 2013 -0400
committer Naseer Ahmed <naseer@codeaurora.org> Mon Mar 25 20:58:54 2013 -0400
tree 99811f5650695b14d0cf489b64891232026e8430
parent 97e24908c1974cfacf6475b2354bae2bd1ce9012

display: Use cache invalidate and clean correctly

Make sure cache is invalidated before reading in software and
cleaned after writing in software.

Change-Id: I91c471c47a5f1ff11f9960f08091a17ffe575534

libgralloc/ionalloc.cpp

diff --git a/libgralloc/ionalloc.cpp b/libgralloc/ionalloc.cpp
index 8480f98..83e62e7 100644
--- a/libgralloc/ionalloc.cpp
+++ b/libgralloc/ionalloc.cpp
@@ -145,7 +145,8 @@
         }
         memset(base, 0, ionAllocData.len);
         // Clean cache after memset
-        clean_buffer(base, data.size, data.offset, fd_data.fd);
+        clean_buffer(base, data.size, data.offset, fd_data.fd,
+                     CACHE_CLEAN_AND_INVALIDATE);
     }
 
     data.base = base;
@@ -209,7 +210,7 @@
     return err;
 
 }
-int IonAlloc::clean_buffer(void *base, size_t size, int offset, int fd)
+int IonAlloc::clean_buffer(void *base, size_t size, int offset, int fd, int op)
 {
     struct ion_flush_data flush_data;
     struct ion_fd_data fd_data;
@@ -237,7 +238,18 @@
 
 #ifdef NEW_ION_API
     struct ion_custom_data d;
-    d.cmd = ION_IOC_CLEAN_INV_CACHES;
+    switch(op) {
+    case CACHE_CLEAN:
+        d.cmd = ION_IOC_CLEAN_CACHES;
+        break;
+    case CACHE_INVALIDATE:
+            d.cmd = ION_IOC_INV_CACHES;
+        break;
+    case CACHE_CLEAN_AND_INVALIDATE:
+    default:
+        d.cmd = ION_IOC_CLEAN_INV_CACHES;
+    }
+
     d.arg = (unsigned long int)&flush_data;
 
     if(ioctl(mIonFd, ION_IOC_CUSTOM, &d)) {