[PATCH v2 hwc] drm_hwcomposer: provide a common gralloc handle definition

[Rob Herring <robh@kernel.org>]

EGL, gralloc, and HWC must all have a common definition of fd's and int's
in native_handle_t to share the fd and width, height, format, etc. of a
dmabuf.

Move the definition into HWC so we aren't dependent on a specific gralloc
implementation and so we don't have to create an importer just for
different native_handle_t layouts. This will allow supporting multiple
gralloc implementations that conform to this layout.

For now, this is aligned with gbm_gralloc's struct. Once we change
gbm_gralloc and mesa to point to this copy, we can make modifications to
the struct.

Signed-off-by: Rob Herring <robh@kernel.org>
---
 Android.mk           |  1 -
 gralloc_drm_handle.h | 87 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 87 insertions(+), 1 deletion(-)
 create mode 100644 gralloc_drm_handle.h

diff --git a/Android.mk b/Android.mk
index 8b11e375adde..ee5b8bfb44d0 100644
--- a/Android.mk
+++ b/Android.mk
@@ -47,7 +47,6 @@ LOCAL_SHARED_LIBRARIES := \
 LOCAL_STATIC_LIBRARIES := libdrmhwc_utils
 
 LOCAL_C_INCLUDES := \
-	external/drm_gralloc \
 	system/core/libsync
 
 LOCAL_SRC_FILES := \
diff --git a/gralloc_drm_handle.h b/gralloc_drm_handle.h
new file mode 100644
index 000000000000..e2f35dda539b
--- /dev/null
+++ b/gralloc_drm_handle.h
@@ -0,0 +1,87 @@
+/*
+ * Copyright (C) 2010-2011 Chia-I Wu <olvaffe@gmail.com>
+ * Copyright (C) 2010-2011 LunarG Inc.
+ * Copyright (C) 2016-2017 Linaro, Ltd., Rob Herring <robh@kernel.org>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ */
+
+#ifndef _GRALLOC_DRM_HANDLE_H_
+#define _GRALLOC_DRM_HANDLE_H_
+
+#include <cutils/native_handle.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+struct gralloc_drm_handle_t {
+	native_handle_t base;
+
+	/* file descriptors */
+	int prime_fd;
+
+	/* integers */
+	int magic;
+
+	int width;
+	int height;
+	int format;
+	int usage;
+
+	int name;   /* the name of the bo */
+	int stride; /* the stride in bytes */
+	int data_owner; /* owner of data (for validation) */
+
+	uint64_t modifier __attribute__((aligned(8))); /* buffer modifiers */
+	union {
+		void *data; /* private pointer for gralloc */
+		uint64_t reserved;
+	} __attribute__((aligned(8)));
+};
+#define GRALLOC_HANDLE_MAGIC 0x5f47424d
+#define GRALLOC_HANDLE_NUM_FDS 1
+#define GRALLOC_HANDLE_NUM_INTS (						\
+	((sizeof(struct gralloc_drm_handle_t) - sizeof(native_handle_t))/sizeof(int))	\
+	 - GRALLOC_HANDLE_NUM_FDS)
+
+static inline struct gralloc_drm_handle_t *gralloc_drm_handle(buffer_handle_t _handle)
+{
+	struct gralloc_drm_handle_t *handle =
+		(struct gralloc_drm_handle_t *) _handle;
+
+	if (handle && (handle->base.version != sizeof(handle->base) ||
+	               handle->base.numInts != GRALLOC_HANDLE_NUM_INTS ||
+	               handle->base.numFds != GRALLOC_HANDLE_NUM_FDS ||
+	               handle->magic != GRALLOC_HANDLE_MAGIC))
+		return NULL;
+
+	return handle;
+}
+
+static inline int gralloc_drm_get_prime_fd(buffer_handle_t _handle)
+{
+	struct gralloc_drm_handle_t *handle = gralloc_drm_handle(_handle);
+	return (handle) ? handle->prime_fd : -1;
+}
+
+#ifdef __cplusplus
+}
+#endif
+#endif /* _GRALLOC_DRM_HANDLE_H_ */
-- 
2.14.1

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