commit 987d1e472015692fdd2eb6dc19a52888e5c61ef7
author Miao Wang <miaowang@google.com> Tue Apr 17 10:41:17 2018 -0700
committer Miao Wang <miaowang@google.com> Fri Apr 20 18:58:09 2018 +0000
tree 042b2c09078feb8253afd6dc275e25d44ca1eda0
parent fe79bccaec70d01f7ff69e91f8239e69def68b70

Set the correct usage flags for rsdAllocationSetSurface

  - To allow a output buffer accessible by GPU, the ANativeWindow should have
    AHARDWAREBUFFER_USAGE_CPU_READ_RARELY and
    AHARDWAREBUFFER_USAGE_CPU_WRITE_OFTEN flags.

Bug: 78172985
Test: mm
Test: RenderScript CTS tests pass
Test: ImageProcessingJB works fine with USAGE_IO_OUTPUT on walleye.
Change-Id: Ic5f9f5d423ba3b720a7d0e27e0f9543a139bae99

driver/rsdAllocation.cpp

diff --git a/driver/rsdAllocation.cpp b/driver/rsdAllocation.cpp
index 6b59d1c..ad926a8 100644
--- a/driver/rsdAllocation.cpp
+++ b/driver/rsdAllocation.cpp
@@ -764,6 +764,15 @@
             return;
         }
 
+        if (alloc->mHal.state.usageFlags & RS_ALLOCATION_USAGE_SCRIPT) {
+            r = ANativeWindow_setUsage(nw,
+                    AHARDWAREBUFFER_USAGE_CPU_READ_RARELY | AHARDWAREBUFFER_USAGE_CPU_WRITE_OFTEN);
+            if (r) {
+                rsc->setError(RS_ERROR_DRIVER, "Error setting IO output buffer usage.");
+                return;
+            }
+        }
+
         IoGetBuffer(rsc, alloc, nw);
         drv->wndSurface = nw;
     }