Make it possible to build gralloc_drm.

third_party/hwcplus/include/hardware/gralloc.h

 /*
  * Copyright (C) 2008 The Android Open Source Project
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
  *
  *      http://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
@@ skipping 112 matching lines @@
     /* implementation-specific private usage flags */
     GRALLOC_USAGE_PRIVATE_0             = 0x10000000,
     GRALLOC_USAGE_PRIVATE_1             = 0x20000000,
     GRALLOC_USAGE_PRIVATE_2             = 0x40000000,
     GRALLOC_USAGE_PRIVATE_3             = 0x80000000,
     GRALLOC_USAGE_PRIVATE_MASK          = 0xF0000000,
 };
 
 /*****************************************************************************/
 
+enum {

[rjkroege, 2014/05/26 20:49:59]

Does this belong here? The implication is that it should be added externally?
Like in the HAL?

Perhaps it could be in a separate file? 

[fjhenigman, 2014/06/01 20:56:52]

This is part of the HAL interface: libhardware lets you load the gralloc module,
then you pass these enums to the "perform" method of that module.
If you needed to do this in chrome code, you wouldn't want them to be defined
only in the gralloc implementation in chromeos-land, if that's what you mean by
not "here."
So I think they belong here.
Android-x86 put them in this file.  Do you prefer they be in their own file?

+    GRALLOC_MODULE_PERFORM_GET_DRM_FD                = 0x80000002,
+    GRALLOC_MODULE_PERFORM_GET_DRM_MAGIC             = 0x80000003,
+    GRALLOC_MODULE_PERFORM_AUTH_DRM_MAGIC            = 0x80000004,
+    GRALLOC_MODULE_PERFORM_ENTER_VT                  = 0x80000005,
+    GRALLOC_MODULE_PERFORM_LEAVE_VT                  = 0x80000006,
+};
+
 /**
  * Every hardware module must have a data structure named HAL_MODULE_INFO_SYM
  * and the fields of this data structure must begin with hw_module_t
  * followed by module specific information.
  */
 typedef struct gralloc_module_t {
     struct hw_module_t common;
     
     /*
      * (*registerBuffer)() must be called before a buffer_handle_t that has not
@@ skipping 161 matching lines @@
             GRALLOC_HARDWARE_GPU0, (struct hw_device_t**)device);
 }
 
 static inline int gralloc_close(struct alloc_device_t* device) {
     return device->common.close(&device->common);
 }
 
 __END_DECLS
 
 #endif  // ANDROID_GRALLOC_INTERFACE_H