SWDEV-530767 ocltst GL test work with GL context on 2nd GPU (#324)

Change-Id: Ia3dbc661b3b9b1de71a632969707318f208131cd

opencl/tests/ocltst/module/common/OCLGLCommon.cpp

@@ -24,7 +24,7 @@
 #include <cstring>
 
 void OCLGLCommon::open(unsigned int test, char *units, double &conversion,
-                       unsigned int deviceId) {
+                       unsigned int &deviceId) {
   // OpenCL Initialization
   OCLTestImp::open(test, units, conversion, deviceId);
   CHECK_RESULT((error_ != CL_SUCCESS), "Error opening test (%d)", error_);
@@ -51,6 +51,8 @@ void OCLGLCommon::open(unsigned int test, char *units, double &conversion,
   CHECK_RESULT((retVal == CL_SUCCESS), "Error opening test (%d)", error_);
 
   createCLContextFromGLContext(hGL_);
+  // Device id may change to match the GL context. Return the id to caller
+  deviceId = _deviceId;
 }
 
 bool OCLGLCommon::IsGLEnabled(unsigned int test, char *units,

opencl/tests/ocltst/module/common/OCLGLCommon.h

@@ -45,7 +45,7 @@ class OCLGLCommon : public OCLTestImp {
   // virtual interface //
   ///////////////////////
   virtual void open(unsigned int test, char* units, double& conversion,
-                    unsigned int deviceId);
+                    unsigned int &deviceId);
   virtual unsigned int close(void);
   static void gluPerspective(double fovy, double aspect, double zNear,
                              double zFar);

opencl/tests/ocltst/module/common/OCLGLCommonLinux.cpp

@@ -169,6 +169,21 @@ bool OCLGLCommon::checkAssociationDeviceWithGLContext(OCLGLHandle& hGL) {
     }
   }
 
+  // If the current device id does not work for CL GL interop,
+  // fall back to other devices.
+  if (!ret) {
+    for (unsigned int i = 0; i < numDevices; i++) {
+      for (unsigned int j = 0; j < deviceCount_; j++) {
+        if (interopDevices[i] == devices_[j]) {
+          // Found an OpenCL device work with current GL context.
+          _deviceId = j;
+          ret = true;
+          break;
+        }
+      }
+    }
+  }
+
   free(interopDevices);
   return ret;
 }