gralloc: Optimize ION cache clean and invalidate calls
-Clients not having WRITE_OFTEN or READ_OFTEN are uncached.
-Invalidate cache on lock only if CPU needs to read and there
are non-CPU writers in system (camera,gpu etc)
-Flush cache on unlock only if CPU writes. Since all buffers will be
read in HWC(MDP) there is no need to check if readers exist.
Change-Id: Icd114e60b7456bd71592b81016892e806c37cb22
diff --git a/libgralloc/alloc_controller.cpp b/libgralloc/alloc_controller.cpp
index 0e80843..c361095 100644
--- a/libgralloc/alloc_controller.cpp
+++ b/libgralloc/alloc_controller.cpp
@@ -76,16 +76,6 @@
return true;
}
-static bool useUncached(int usage)
-{
- if (usage & GRALLOC_USAGE_PRIVATE_UNCACHED)
- return true;
- if(((usage & GRALLOC_USAGE_SW_WRITE_MASK) == GRALLOC_USAGE_SW_WRITE_RARELY)
- ||((usage & GRALLOC_USAGE_SW_READ_MASK) == GRALLOC_USAGE_SW_READ_RARELY))
- return true;
- return false;
-}
-
//-------------- AdrenoMemInfo-----------------------//
AdrenoMemInfo::AdrenoMemInfo()
{
@@ -664,3 +654,14 @@
delete hnd;
}
+
+bool useUncached(const int& usage) {
+ if(usage & GRALLOC_USAGE_PRIVATE_UNCACHED)
+ return true;
+
+ if(not (usage & (GRALLOC_USAGE_SW_WRITE_OFTEN |
+ GRALLOC_USAGE_SW_READ_OFTEN)))
+ return true;
+
+ return false;
+}