From 0fddf7d4a323917438f2fa475e25e0f0fccf1336 Mon Sep 17 00:00:00 2001
From: SeYeong Byeon <sy.byeon@samsung.com>
Date: Wed, 7 Oct 2020 16:04:38 +0900
Subject: gralloc4: initial code

Bug: 173320140
Test: Builds successfully with gralloc3 and gralloc4
Test: Device boots to home with gralloc3
No-Typo-Check: Typos in comments from upstream
Signed-off-by: SeYeong Byeon <sy.byeon@samsung.com>
Change-Id: I1df105fd0358a0d1ee9c0266acafc4f7192ebc92
---
 gralloc4/src/core/mali_gralloc_bufferallocation.h | 115 ++++++++++++++++++++++
 1 file changed, 115 insertions(+)
 create mode 100644 gralloc4/src/core/mali_gralloc_bufferallocation.h

(limited to 'gralloc4/src/core/mali_gralloc_bufferallocation.h')

diff --git a/gralloc4/src/core/mali_gralloc_bufferallocation.h b/gralloc4/src/core/mali_gralloc_bufferallocation.h
new file mode 100644
index 0000000..bcc927f
--- /dev/null
+++ b/gralloc4/src/core/mali_gralloc_bufferallocation.h
@@ -0,0 +1,115 @@
+/*
+ * Copyright (C) 2016-2020 ARM Limited. All rights reserved.
+ *
+ * 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
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+#ifndef MALI_GRALLOC_BUFFERALLOCATION_H_
+#define MALI_GRALLOC_BUFFERALLOCATION_H_
+
+#include <hardware/hardware.h>
+#include "mali_gralloc_buffer.h"
+#include "core/mali_gralloc_bufferdescriptor.h"
+
+/* Compression scheme */
+enum class AllocBaseType
+{
+	/*
+	 * No compression scheme
+         */
+	UNCOMPRESSED,
+
+	/*
+	 * Arm Framebuffer Compression
+         */
+	AFBC,              /* 16 x 16 block size */
+	AFBC_WIDEBLK,      /* 32 x 8 block size */
+	AFBC_EXTRAWIDEBLK, /* 64 x 4 block size */
+
+};
+
+/*
+ * Allocation type.
+ *
+ * Allocation-specific properties of format modifiers
+ * described by MALI_GRALLOC_INTFMT_*.
+ */
+struct AllocType
+{
+	/*
+	 * The compression scheme in use
+	 *
+	 * For AFBC formats, this describes:
+	 * - the block size for single plane base formats, or
+	 * - the block size of the first/luma plane for multi-plane base formats.
+	 */
+	AllocBaseType primary_type{AllocBaseType::UNCOMPRESSED};
+
+	/*
+	 * Multi-plane AFBC format. AFBC chroma-only plane(s) are
+	 * always compressed with superblock type 'AFBC_EXTRAWIDEBLK'.
+	 */
+	bool is_multi_plane{};
+
+	/*
+	 * Allocate tiled AFBC headers.
+	 */
+	bool is_tiled{};
+
+	/*
+	 * Pad AFBC header stride to 64-byte alignment
+	 * (multiple of 4x16B headers).
+	 */
+	bool is_padded{};
+
+	/*
+	 * Front-buffer rendering safe AFBC allocations include an
+	 * additional 4kB-aligned body buffer.
+	 */
+	bool is_frontbuffer_safe{};
+
+	bool is_afbc() const
+	{
+		switch (primary_type)
+		{
+		case AllocBaseType::AFBC:
+		case AllocBaseType::AFBC_WIDEBLK:
+		case AllocBaseType::AFBC_EXTRAWIDEBLK:
+			return true;
+		default:
+			return false;
+		}
+	}
+
+};
+
+using alloc_type_t = AllocType;
+
+int mali_gralloc_derive_format_and_size(buffer_descriptor_t * const bufDescriptor);
+
+int mali_gralloc_buffer_allocate(const gralloc_buffer_descriptor_t *descriptors,
+                                 uint32_t numDescriptors, buffer_handle_t *pHandle, bool *shared_backend);
+
+int mali_gralloc_buffer_free(buffer_handle_t pHandle);
+
+void init_afbc(uint8_t *buf, uint64_t internal_format, const bool is_multi_plane, int w, int h);
+
+uint32_t lcm(uint32_t a, uint32_t b);
+
+bool get_alloc_type(const uint64_t format_ext,
+                    const uint32_t format_idx,
+                    const uint64_t usage,
+                    alloc_type_t * const alloc_type);
+
+#endif /* MALI_GRALLOC_BUFFERALLOCATION_H_ */
-- 
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