[RFC PATCH V0 7/7] [media] platform: mtk-isp: Add Mediatek FD driver

[Jerry-ch Chen <Jerry-Ch.chen-NuS5LvNUpcJWk0Htik3J/w@public.gmane.org>]

This patch adds the driver of Face Detection (FD) unit in
Mediatek camera system, providing face detection function.

The mtk-isp directory will contain drivers for multiple IP
blocks found in Mediatek ISP system. It will include ISP Pass 1
driver (CAM), sensor interface driver, DIP driver and face
detection driver.

Signed-off-by: Jerry-ch Chen <jerry-ch.chen-NuS5LvNUpcJWk0Htik3J/w@public.gmane.org>
---
 drivers/media/platform/mtk-isp/Makefile            |   16 +
 drivers/media/platform/mtk-isp/fd/Makefile         |   38 +
 drivers/media/platform/mtk-isp/fd/mtk_fd-core.h    |  157 +++
 drivers/media/platform/mtk-isp/fd/mtk_fd-ctx.h     |  299 ++++++
 .../platform/mtk-isp/fd/mtk_fd-dev-ctx-core.c      |  912 +++++++++++++++++
 drivers/media/platform/mtk-isp/fd/mtk_fd-dev.c     |  355 +++++++
 drivers/media/platform/mtk-isp/fd/mtk_fd-dev.h     |  198 ++++
 .../media/platform/mtk-isp/fd/mtk_fd-smem-drv.c    |  452 +++++++++
 drivers/media/platform/mtk-isp/fd/mtk_fd-smem.h    |   25 +
 .../media/platform/mtk-isp/fd/mtk_fd-v4l2-util.c   | 1046 ++++++++++++++++++++
 drivers/media/platform/mtk-isp/fd/mtk_fd-v4l2.c    |  114 +++
 drivers/media/platform/mtk-isp/fd/mtk_fd-v4l2.h    |   36 +
 drivers/media/platform/mtk-isp/fd/mtk_fd.c         |  730 ++++++++++++++
 drivers/media/platform/mtk-isp/fd/mtk_fd.h         |  127 +++
 14 files changed, 4505 insertions(+)
 create mode 100644 drivers/media/platform/mtk-isp/Makefile
 create mode 100644 drivers/media/platform/mtk-isp/fd/Makefile
 create mode 100644 drivers/media/platform/mtk-isp/fd/mtk_fd-core.h
 create mode 100644 drivers/media/platform/mtk-isp/fd/mtk_fd-ctx.h
 create mode 100644 drivers/media/platform/mtk-isp/fd/mtk_fd-dev-ctx-core.c
 create mode 100644 drivers/media/platform/mtk-isp/fd/mtk_fd-dev.c
 create mode 100644 drivers/media/platform/mtk-isp/fd/mtk_fd-dev.h
 create mode 100644 drivers/media/platform/mtk-isp/fd/mtk_fd-smem-drv.c
 create mode 100644 drivers/media/platform/mtk-isp/fd/mtk_fd-smem.h
 create mode 100644 drivers/media/platform/mtk-isp/fd/mtk_fd-v4l2-util.c
 create mode 100644 drivers/media/platform/mtk-isp/fd/mtk_fd-v4l2.c
 create mode 100644 drivers/media/platform/mtk-isp/fd/mtk_fd-v4l2.h
 create mode 100644 drivers/media/platform/mtk-isp/fd/mtk_fd.c
 create mode 100644 drivers/media/platform/mtk-isp/fd/mtk_fd.h

diff --git a/drivers/media/platform/mtk-isp/Makefile b/drivers/media/platform/mtk-isp/Makefile
new file mode 100644
index 0000000..5e3a9aa
--- /dev/null
+++ b/drivers/media/platform/mtk-isp/Makefile
@@ -0,0 +1,16 @@
+#
+# Copyright (C) 2018 MediaTek Inc.
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License version 2 as
+# published by the Free Software Foundation.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+
+ifeq ($(CONFIG_VIDEO_MEDIATEK_FD_SUPPORT),y)
+obj-y += fd/
+endif
diff --git a/drivers/media/platform/mtk-isp/fd/Makefile b/drivers/media/platform/mtk-isp/fd/Makefile
new file mode 100644
index 0000000..ac168c1
--- /dev/null
+++ b/drivers/media/platform/mtk-isp/fd/Makefile
@@ -0,0 +1,38 @@
+#
+# Copyright (C) 2018 MediaTek Inc.
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License version 2 as
+# published by the Free Software Foundation.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+
+$(info "FD: makefile start srctree: $(srctree)")
+ccflags-y += -I$(srctree)/drivers/media/platform/mtk-vpu
+ccflags-y += -I$(srctree)/drivers/media/platform/mtk-isp/fd
+#ccflags-y += -I$(srctree)/drivers/media/platform/mtk-isp/common
+
+obj-y += mtk_fd.o
+obj-y += mtk_fd-v4l2.o
+
+# To provide alloc context managing memory shared
+# between CPU and FD coprocessor
+mtk_fd_smem-objs := \
+mtk_fd-smem-drv.o
+
+obj-y += mtk_fd_smem.o
+
+# Utilits to provide frame-based streaming model
+# with v4l2 user interfaces
+mtk_fd_util-objs := \
+mtk_fd-dev.o \
+mtk_fd-v4l2-util.o \
+mtk_fd-dev-ctx-core.o
+
+obj-y += mtk_fd_util.o
+
+$(info "FD: makefile end")
diff --git a/drivers/media/platform/mtk-isp/fd/mtk_fd-core.h b/drivers/media/platform/mtk-isp/fd/mtk_fd-core.h
new file mode 100644
index 0000000..a7c1e1d
--- /dev/null
+++ b/drivers/media/platform/mtk-isp/fd/mtk_fd-core.h
@@ -0,0 +1,157 @@
+/* SPDX-License-Identifier: GPL-2.0
+ * Copyright (C) 2015 MediaTek Inc.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#ifndef __MTK_FD_CORE_H__
+#define __MTK_FD_CORE_H__
+
+#define SIG_ERESTARTSYS 512
+
+#ifndef CONFIG_MTK_CLKMGR
+#include <linux/clk.h>
+#endif
+
+#ifdef CONFIG_MTK_CLKMGR
+#include <mach/mt_clkmgr.h>
+#endif
+
+#include "mtk_fd-dev.h"
+#include "mtk_fd-ctx.h"
+
+#include <linux/io.h>
+
+#define FD_WR32(v, a) \
+do { \
+	__raw_writel((v), (void __force __iomem *)((a))); \
+	mb(); /* ensure written */ \
+} while (0)
+
+#define FD_RD32(addr)                  ioread32((void *)addr)
+
+#define	FD_INT_EN	(0x15c)
+#define	FD_INT		(0x168)
+#define	FD_RESULT	(0x178)
+#define FD_IRQ_MASK	(0x001)
+
+#define RS_BUF_SIZE_MAX	(2288788)
+#define VA_OFFSET	(0xffff000000000000)
+
+enum fd_irq {
+	FD_IRQ_IDX = 0,
+	FD_IRQ_IDX_NUM
+};
+
+enum fd_state {
+	FD_INI,
+	FD_ENQ,
+	FD_CBD,
+};
+
+enum stream_stat {
+	STREAM_OFF,
+	STREAM_ON,
+};
+
+struct ipi_fd_enq_param {
+	u8 source_img_fmt;
+	struct fd_buffer output_addr;
+	struct fd_buffer src_y;
+	struct fd_buffer src_uv;
+	struct fd_buffer config_addr;
+} __packed;
+
+struct fd_manager_ctx {
+	struct fd_buffer learn_data_buf[2][LEARNDATA_NUM];
+	struct fd_buffer fd_config;
+	struct fd_buffer rs_config;
+	struct fd_buffer fd_result;
+	struct fd_buffer rs_result;
+	struct fd_buffer src_img;
+} __packed;
+
+struct mtk_fd_drv_ctx {
+	struct sg_table sgtable;
+	u32 frame_id;
+	struct fd_buffer rs_result;
+	struct fd_buffer scp_mem;
+	struct platform_device *vpu_pdev;
+
+	atomic_t fd_enque_cnt;
+	atomic_t fd_stream_cnt;
+	atomic_t fd_user_cnt;
+};
+
+struct mtk_fd_drv_dev {
+	struct platform_device *pdev;
+
+	dev_t fd_devno;
+	struct cdev   fd_cdev;
+	struct class *fd_class;
+	struct mtk_fd_drv_ctx fd_ctx;
+
+	struct device *larb_dev;
+	struct clk *fd_clk;
+	enum fd_state state;
+	enum stream_stat streaming;
+
+	wait_queue_head_t wq;
+	u32 fd_irq_result;
+
+	void __iomem *fd_base;
+};
+
+struct mtk_isp_fd_drv_data {
+	struct mtk_fd_dev fd_dev;
+	struct mtk_fd_drv_dev fd_hw_dev;
+} __packed;
+
+static inline struct mtk_fd_drv_dev *get_fd_hw_device(struct device *dev)
+{
+	struct mtk_isp_fd_drv_data *drv_data =
+		dev_get_drvdata(dev);
+	if (drv_data)
+		return &drv_data->fd_hw_dev;
+	else
+		return NULL;
+}
+
+#define mtk_fd_us_to_jiffies(us) \
+	((((unsigned long)(us) / 1000) * HZ + 512) >> 10)
+
+#define mtk_fd_hw_dev_to_drv(__fd_hw_dev) \
+	container_of(__fd_hw_dev, \
+	struct mtk_isp_fd_drv_data, fd_hw_dev)
+
+#define mtk_fd_ctx_to_drv(__fd_ctx) \
+	container_of(__fd_ctx, \
+	struct mtk_isp_fd_drv_data, fd_hw_dev.fd_ctx)
+
+enum fd_scp_cmd {
+	FD_CMD_INIT,
+	FD_CMD_ENQ,
+	FD_CMD_EXIT,
+};
+
+enum fd_clk {
+	clock_off = 0,
+	clock_on,
+};
+
+struct ipi_message {
+	u8 cmd_id;
+	union {
+		struct fd_buffer fd_manager;
+		struct v4l2_fd_param fd_param;
+	};
+} __packed;
+
+#endif/*__MTK_FD_CORE_H__*/
diff --git a/drivers/media/platform/mtk-isp/fd/mtk_fd-ctx.h b/drivers/media/platform/mtk-isp/fd/mtk_fd-ctx.h
new file mode 100644
index 0000000..d78a3af
--- /dev/null
+++ b/drivers/media/platform/mtk-isp/fd/mtk_fd-ctx.h
@@ -0,0 +1,299 @@
+/* SPDX-License-Identifier: GPL-2.0
+ * Copyright (c) 2018 MediaTek Inc.
+ * Author: Frederic Chen <frederic.chen-NuS5LvNUpcJWk0Htik3J/w@public.gmane.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#ifndef __MTK_FD_CTX_H__
+#define __MTK_FD_CTX_H__
+
+#include <linux/types.h>
+#include <linux/videodev2.h>
+#include <media/v4l2-ctrls.h>
+#include <media/videobuf2-core.h>
+#include <media/v4l2-subdev.h>
+
+#define MTK_FD_CTX_QUEUES (16)
+#define MTK_FD_CTX_FRAME_BUNDLE_BUFFER_MAX (MTK_FD_CTX_QUEUES)
+#define MTK_FD_CTX_DESC_MAX (MTK_FD_CTX_QUEUES)
+
+#define MTK_FD_CTX_MODE_DEBUG_OFF (0)
+#define MTK_FD_CTX_MODE_DEBUG_BYPASS_JOB_TRIGGER (1)
+#define MTK_FD_CTX_MODE_DEBUG_BYPASS_ALL (2)
+
+#define MTK_FD_GET_CTX_ID_FROM_SEQUENCE(sequence) \
+	((sequence) >> 16 & 0x0000FFFF)
+
+#define MTK_FD_CTX_META_BUF_DEFAULT_SIZE (1110 * 1024)
+
+struct mtk_fd_ctx;
+struct mtk_fd_ctx_finish_param;
+
+/**
+ * Attributes setup by device context owner
+ */
+struct mtk_fd_ctx_queue_desc {
+	int id;
+	/* id of the context queue */
+	char *name;
+	/* Will be exported to media entity name */
+	int capture;
+	/**
+	 * 1 for capture queue (device to user),
+	 * 0 for output queue (from user to device)
+	 */
+	int image;
+	/* 1 for image, 0 for meta data */
+	unsigned int dma_port;
+	/*The dma port associated to the buffer*/
+	struct mtk_fd_ctx_format *fmts;
+	int num_fmts;
+	/* Default format of this queue */
+	int default_fmt_idx;
+};
+
+/**
+ * Supported format and the information used for
+ * size calculation
+ */
+struct mtk_fd_ctx_meta_format {
+	u32 dataformat;
+	u32 max_buffer_size;
+	u8 flags;
+};
+
+/**
+ * MDP module's private format definitation
+ * (the same as struct mdp_format)
+ * It will be removed and changed to MDP's external interface
+ * after the integration with MDP module.
+ */
+struct mtk_fd_ctx_mdp_format {
+	u32	pixelformat;
+	u32	mdp_color;
+	u8	depth[VIDEO_MAX_PLANES];
+	u8	row_depth[VIDEO_MAX_PLANES];
+	u8	num_planes;
+	u8	walign;
+	u8	halign;
+	u8	salign;
+	u32	flags;
+};
+
+struct mtk_fd_ctx_format {
+	union {
+		struct mtk_fd_ctx_meta_format meta;
+		struct mtk_fd_ctx_mdp_format img;
+	} fmt;
+};
+
+union mtk_v4l2_fmt {
+	struct v4l2_pix_format_mplane pix_mp;
+	struct v4l2_meta_format	meta;
+};
+
+/* Attributes setup by device context owner */
+struct mtk_fd_ctx_queues_setting {
+	int master;
+	/* The master input node to trigger the frame data enqueue */
+	struct mtk_fd_ctx_queue_desc *output_queue_descs;
+	int total_output_queues;
+	struct mtk_fd_ctx_queue_desc *capture_queue_descs;
+	int total_capture_queues;
+};
+
+struct mtk_fd_ctx_queue_attr {
+	int master;
+	int input_offset;
+	int total_num;
+};
+
+/**
+ * Video node context. Since we use
+ * mtk_fd_ctx_frame_bundle to manage enqueued
+ * buffers by frame now, we don't use bufs filed of
+ * mtk_fd_ctx_queue now
+ */
+struct mtk_fd_ctx_queue {
+	union mtk_v4l2_fmt fmt;
+	struct mtk_fd_ctx_format *ctx_fmt;
+
+	unsigned int width_pad;
+	/* bytesperline, reserved */
+	struct mtk_fd_ctx_queue_desc desc;
+	unsigned int buffer_usage;
+	/* Current buffer usage of the queue */
+	int rotation;
+	struct list_head bufs;
+	/* Reserved, not used now */
+};
+
+enum mtk_fd_ctx_frame_bundle_state {
+	MTK_FD_CTX_FRAME_NEW,
+	/* Not allocated */
+	MTK_FD_CTX_FRAME_PREPARED,
+	/* Allocated but has not be processed */
+	MTK_FD_CTX_FRAME_PROCESSING,
+	/* Queued, waiting to be filled */
+};
+
+/**
+ * The definiation is compatible with FD driver's state definiation
+ * currently and will be decoupled after further integration
+ */
+enum mtk_fd_ctx_frame_data_state {
+	MTK_FD_CTX_FRAME_DATA_EMPTY = 0, /* FRAME_STATE_INIT */
+	MTK_FD_CTX_FRAME_DATA_DONE = 3, /* FRAME_STATE_DONE */
+	MTK_FD_CTX_FRAME_DATA_STREAMOFF_DONE = 4, /*FRAME_STATE_STREAMOFF*/
+	MTK_FD_CTX_FRAME_DATA_ERROR = 5, /*FRAME_STATE_ERROR*/
+};
+
+struct mtk_fd_ctx_frame_bundle {
+	struct mtk_fd_ctx_buffer*
+		buffers[MTK_FD_CTX_FRAME_BUNDLE_BUFFER_MAX];
+	int id;
+	int num_img_capture_bufs;
+	int num_img_output_bufs;
+	int num_meta_capture_bufs;
+	int num_meta_output_bufs;
+	int last_index;
+	int state;
+	struct list_head list;
+};
+
+struct mtk_fd_ctx_frame_bundle_list {
+	struct list_head list;
+};
+
+struct mtk_fd_ctx {
+	struct platform_device *pdev;
+	struct platform_device *smem_device;
+	unsigned short ctx_id;
+	char device_name[12];
+	const struct mtk_fd_ctx_ops *ops;
+	struct mtk_fd_dev_node_mapping *mtk_fd_dev_node_map;
+	unsigned int dev_node_num;
+	struct mtk_fd_ctx_queue queue[MTK_FD_CTX_QUEUES];
+	struct mtk_fd_ctx_queue_attr queues_attr;
+	atomic_t frame_param_sequence;
+	int streaming;
+	void *img_vb2_alloc_ctx;
+	void *smem_vb2_alloc_ctx;
+	struct v4l2_subdev_fh *fh;
+	struct mtk_fd_ctx_frame_bundle frame_bundles[VB2_MAX_FRAME];
+	struct mtk_fd_ctx_frame_bundle_list processing_frames;
+	struct mtk_fd_ctx_frame_bundle_list free_frames;
+	int enabled_dma_ports;
+	int num_frame_bundle;
+	int mode; /* Reserved for debug */
+	spinlock_t qlock;
+};
+
+enum mtk_fd_ctx_buffer_state {
+	MTK_FD_CTX_BUFFER_NEW,
+	MTK_FD_CTX_BUFFER_PROCESSING,
+	MTK_FD_CTX_BUFFER_DONE,
+	MTK_FD_CTX_BUFFER_FAILED,
+};
+
+struct mtk_fd_ctx_buffer {
+	union mtk_v4l2_fmt fmt;
+	struct mtk_fd_ctx_format *ctx_fmt;
+	int capture;
+	int image;
+	int frame_id;
+	int user_sequence; /* Sequence number assigned by user */
+	dma_addr_t daddr;
+	void *vaddr;
+	phys_addr_t paddr;
+	unsigned int queue;
+	unsigned int buffer_usage;
+	enum mtk_fd_ctx_buffer_state state;
+	int rotation;
+	struct list_head list;
+};
+
+struct mtk_fd_ctx_desc {
+	char *proc_dev_phandle;
+	/* The context device's compatble string name in device tree*/
+	int (*init)(struct mtk_fd_ctx *ctx);
+	/* configure the core functions of the device context */
+};
+
+struct mtk_fd_ctx_init_table {
+	int total_dev_ctx;
+	struct mtk_fd_ctx_desc *ctx_desc_tbl;
+};
+
+struct mtk_fd_ctx_finish_param {
+	unsigned int frame_id;
+	u64 timestamp;
+	unsigned int state;
+};
+
+bool mtk_fd_ctx_is_streaming(struct mtk_fd_ctx *ctx);
+
+int mtk_fd_ctx_core_job_finish(struct mtk_fd_ctx *ctx,
+			       struct mtk_fd_ctx_finish_param *param);
+
+int mtk_fd_ctx_core_init(struct mtk_fd_ctx *ctx,
+			 struct platform_device *pdev, int ctx_id,
+			 struct mtk_fd_ctx_desc *ctx_desc,
+			 struct platform_device *proc_pdev,
+			 struct platform_device *smem_pdev);
+
+int mtk_fd_ctx_core_exit(struct mtk_fd_ctx *ctx);
+
+void mtk_fd_ctx_buf_init(struct mtk_fd_ctx_buffer *b, unsigned int queue,
+			 dma_addr_t daddr);
+
+enum mtk_fd_ctx_buffer_state
+	mtk_fd_ctx_get_buffer_state(struct mtk_fd_ctx_buffer *b);
+
+int mtk_fd_ctx_next_global_frame_sequence(struct mtk_fd_ctx *ctx, int locked);
+
+int mtk_fd_ctx_core_queue_setup
+	(struct mtk_fd_ctx *ctx,
+	 struct mtk_fd_ctx_queues_setting *queues_setting);
+
+int mtk_fd_ctx_core_finish_param_init(void *param, int frame_id, int state);
+
+int mtk_fd_ctx_finish_frame(struct mtk_fd_ctx *dev_ctx,
+			    struct mtk_fd_ctx_frame_bundle *frame_bundle,
+			    int done);
+
+int mtk_fd_ctx_frame_bundle_init(struct mtk_fd_ctx_frame_bundle *frame_bundle);
+
+void mtk_fd_ctx_frame_bundle_add(struct mtk_fd_ctx *ctx,
+				 struct mtk_fd_ctx_frame_bundle *bundle,
+				 struct mtk_fd_ctx_buffer *ctx_buf);
+
+int mtk_fd_ctx_trigger_job(struct mtk_fd_ctx *dev_ctx,
+			   struct mtk_fd_ctx_frame_bundle *bundle_data);
+
+int mtk_fd_ctx_fmt_set_img(struct mtk_fd_ctx *dev_ctx, int queue_id,
+			   struct v4l2_pix_format_mplane *user_fmt,
+			   struct v4l2_pix_format_mplane *node_fmt);
+
+int mtk_fd_ctx_fmt_set_meta(struct mtk_fd_ctx *dev_ctx, int queue_id,
+			    struct v4l2_meta_format *user_fmt,
+			    struct v4l2_meta_format *node_fmt);
+
+int mtk_fd_ctx_format_load_default_fmt(struct mtk_fd_ctx_queue *queue,
+				       struct v4l2_format *fmt_to_fill);
+
+int mtk_fd_ctx_streamon(struct mtk_fd_ctx *dev_ctx);
+int mtk_fd_ctx_streamoff(struct mtk_fd_ctx *dev_ctx);
+int mtk_fd_ctx_release(struct mtk_fd_ctx *dev_ctx);
+int mtk_fd_ctx_open(struct mtk_fd_ctx *dev_ctx);
+int mtk_fd_ctx_fd_init(struct mtk_fd_ctx *ctx);
+
+#endif /*__MTK_FD_CTX_H__*/
diff --git a/drivers/media/platform/mtk-isp/fd/mtk_fd-dev-ctx-core.c b/drivers/media/platform/mtk-isp/fd/mtk_fd-dev-ctx-core.c
new file mode 100644
index 0000000..7314436
--- /dev/null
+++ b/drivers/media/platform/mtk-isp/fd/mtk_fd-dev-ctx-core.c
@@ -0,0 +1,912 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (c) 2018 MediaTek Inc.
+ * Author: Frederic Chen <frederic.chen-NuS5LvNUpcJWk0Htik3J/w@public.gmane.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/device.h>
+#include <linux/platform_device.h>
+#include <media/videobuf2-dma-contig.h>
+#include <linux/dma-mapping.h>
+
+#include "mtk_fd.h"
+#include "mtk_fd-dev.h"
+#include "mtk_fd-smem.h"
+#include "mtk_fd-v4l2.h"
+
+#if KERNEL_VERSION(4, 8, 0) >= MTK_FD_KERNEL_BASE_VERSION
+#include <linux/dma-attrs.h>
+#endif
+
+struct vb2_v4l2_buffer *mtk_fd_ctx_buffer_get_vb2_v4l2_buffer
+(struct mtk_fd_ctx_buffer *ctx_buf)
+{
+	struct mtk_fd_dev_buffer *dev_buf = NULL;
+
+	if (!ctx_buf) {
+		pr_err("Failed to convert ctx_buf to dev_buf: Null pointer\n");
+		return NULL;
+	}
+
+	dev_buf	= mtk_fd_ctx_buf_to_dev_buf(ctx_buf);
+
+	return &dev_buf->m2m2_buf.vbb;
+}
+
+int mtk_fd_ctx_core_queue_setup(struct mtk_fd_ctx *ctx,
+				struct mtk_fd_ctx_queues_setting *
+				queues_setting)
+{
+	int queue_idx = 0;
+	int i = 0;
+
+	for (i = 0; i < queues_setting->total_output_queues; i++) {
+		struct mtk_fd_ctx_queue_desc *queue_desc =
+			&queues_setting->output_queue_descs[i];
+		ctx->queue[queue_idx].desc = *queue_desc;
+		queue_idx++;
+	}
+
+	/* Setup the capture queue */
+	for (i = 0; i < queues_setting->total_capture_queues; i++) {
+		struct mtk_fd_ctx_queue_desc *queue_desc =
+			&queues_setting->capture_queue_descs[i];
+		ctx->queue[queue_idx].desc = *queue_desc;
+		queue_idx++;
+	}
+
+	ctx->queues_attr.master = queues_setting->master;
+	ctx->queues_attr.total_num = queue_idx;
+	ctx->dev_node_num = ctx->queues_attr.total_num;
+	strcpy(ctx->device_name, MTK_FD_DEV_NAME);
+	return 0;
+}
+
+/* Mediatek FD context core initialization */
+int mtk_fd_ctx_core_init(struct mtk_fd_ctx *ctx,
+			 struct platform_device *pdev, int ctx_id,
+			 struct mtk_fd_ctx_desc *ctx_desc,
+			 struct platform_device *proc_pdev,
+			 struct platform_device *smem_pdev)
+{
+	/* Initialize main data structure */
+	int r = 0;
+
+#if KERNEL_VERSION(4, 8, 0) >= MTK_FD_KERNEL_BASE_VERSION
+	ctx->smem_vb2_alloc_ctx =
+		vb2_dma_contig_init_ctx(&smem_pdev->dev);
+	ctx->img_vb2_alloc_ctx =
+		vb2_dma_contig_init_ctx(&pdev->dev);
+#else
+	ctx->smem_vb2_alloc_ctx = &smem_pdev->dev;
+	ctx->img_vb2_alloc_ctx = &pdev->dev;
+#endif
+	if (IS_ERR((__force void *)ctx->smem_vb2_alloc_ctx))
+		pr_err("Failed to alloc vb2 dma context: smem_vb2_alloc_ctx");
+
+	if (IS_ERR((__force void *)ctx->img_vb2_alloc_ctx))
+		pr_err("Failed to alloc vb2 dma context: img_vb2_alloc_ctx");
+
+	ctx->pdev = pdev;
+	ctx->ctx_id = ctx_id;
+	/* keep th smem pdev to use related iommu functions */
+	ctx->smem_device = smem_pdev;
+
+	/* Will set default enabled after passing the unit test */
+	ctx->mode = MTK_FD_CTX_MODE_DEBUG_OFF;
+
+	/* initialized the global frame index of the device context */
+	atomic_set(&ctx->frame_param_sequence, 0);
+	spin_lock_init(&ctx->qlock);
+
+	/* setup the core operation of the device context */
+	if (ctx_desc && ctx_desc->init)
+		r = ctx_desc->init(ctx);
+
+	return r;
+}
+EXPORT_SYMBOL_GPL(mtk_fd_ctx_core_init);
+
+int mtk_fd_ctx_core_exit(struct mtk_fd_ctx *ctx)
+{
+#if KERNEL_VERSION(4, 8, 0) >= MTK_FD_KERNEL_BASE_VERSION
+	vb2_dma_contig_cleanup_ctx(ctx->smem_vb2_alloc_ctx);
+	vb2_dma_contig_cleanup_ctx(ctx->img_vb2_alloc_ctx);
+#else
+	ctx->smem_vb2_alloc_ctx = NULL;
+	ctx->img_vb2_alloc_ctx = NULL;
+#endif
+	return 0;
+}
+EXPORT_SYMBOL_GPL(mtk_fd_ctx_core_exit);
+
+int mtk_fd_ctx_next_global_frame_sequence(struct mtk_fd_ctx *ctx, int locked)
+{
+	int global_frame_sequence =
+		atomic_inc_return(&ctx->frame_param_sequence);
+
+	if (!locked)
+		spin_lock(&ctx->qlock);
+
+	global_frame_sequence =
+		(global_frame_sequence & 0x0000FFFF) | (ctx->ctx_id << 16);
+
+	if (!locked)
+		spin_unlock(&ctx->qlock);
+
+	return global_frame_sequence;
+}
+EXPORT_SYMBOL_GPL(mtk_fd_ctx_next_global_frame_sequence);
+
+static void mtk_fd_ctx_buffer_done
+	(struct mtk_fd_ctx_buffer *ctx_buf, int state)
+{
+		if (!ctx_buf || state != MTK_FD_CTX_BUFFER_DONE ||
+		    state != MTK_FD_CTX_BUFFER_FAILED)
+			return;
+
+		ctx_buf->state = state;
+}
+
+struct mtk_fd_ctx_frame_bundle *mtk_fd_ctx_get_processing_frame
+(struct mtk_fd_ctx *dev_ctx, int frame_id)
+{
+	struct mtk_fd_ctx_frame_bundle *frame_bundle = NULL;
+
+	spin_lock(&dev_ctx->qlock);
+
+	list_for_each_entry(frame_bundle,
+			    &dev_ctx->processing_frames.list, list) {
+		if (frame_bundle->id == frame_id) {
+			spin_unlock(&dev_ctx->qlock);
+			return frame_bundle;
+		}
+	}
+
+	spin_unlock(&dev_ctx->qlock);
+
+	return NULL;
+}
+
+/**
+ * structure mtk_fd_ctx_finish_param must be the first elemt of param
+ * So that the buffer can be return to vb2 queue successfully
+ */
+int mtk_fd_ctx_core_finish_param_init(void *param, int frame_id, int state)
+{
+	struct mtk_fd_ctx_finish_param *fram_param =
+		(struct mtk_fd_ctx_finish_param *)param;
+	fram_param->frame_id = frame_id;
+	fram_param->state = state;
+	return 0;
+}
+EXPORT_SYMBOL_GPL(mtk_fd_ctx_core_finish_param_init);
+
+void mtk_fd_ctx_frame_bundle_add(struct mtk_fd_ctx *ctx,
+				 struct mtk_fd_ctx_frame_bundle *bundle,
+				 struct mtk_fd_ctx_buffer *ctx_buf)
+{
+	int queue_id = 0;
+	struct mtk_fd_ctx_queue *ctx_queue = NULL;
+
+	if (!bundle || !ctx_buf) {
+		pr_warn("Add buffer to frame bundle failed, bundle(%llx),buf(%llx)\n",
+			(long long)bundle, (long long)ctx_buf);
+		return;
+	}
+
+	queue_id = ctx_buf->queue;
+
+	if (bundle->buffers[queue_id])
+		pr_warn("Queue(%d) buffer has alreay in this bundle, overwrite happen\n",
+			queue_id);
+
+	pr_debug("Add queue(%d) buffer%llx\n",
+		 queue_id, (unsigned long long)ctx_buf);
+		 bundle->buffers[queue_id] = ctx_buf;
+
+	/* Fill context queue related information */
+	ctx_queue = &ctx->queue[queue_id];
+
+	if (!ctx_queue) {
+		pr_err("Can't find ctx queue (%d)\n", queue_id);
+		return;
+	}
+
+	if (ctx->queue[ctx_buf->queue].desc.image) {
+		if (ctx->queue[ctx_buf->queue].desc.capture)
+			bundle->num_img_capture_bufs++;
+		else
+			bundle->num_img_output_bufs++;
+	} else {
+		if (ctx->queue[ctx_buf->queue].desc.capture)
+			bundle->num_meta_capture_bufs++;
+		else
+			bundle->num_meta_output_bufs++;
+	}
+}
+EXPORT_SYMBOL_GPL(mtk_fd_ctx_frame_bundle_add);
+
+void mtk_fd_ctx_buf_init(struct mtk_fd_ctx_buffer *b,
+			 unsigned int queue, dma_addr_t daddr)
+{
+	b->state = MTK_FD_CTX_BUFFER_NEW;
+	b->queue = queue;
+	b->daddr = daddr;
+}
+EXPORT_SYMBOL_GPL(mtk_fd_ctx_buf_init);
+
+enum mtk_fd_ctx_buffer_state
+	mtk_fd_ctx_get_buffer_state(struct mtk_fd_ctx_buffer *b)
+{
+	return b->state;
+}
+
+bool mtk_fd_ctx_is_streaming(struct mtk_fd_ctx *ctx)
+{
+	return ctx->streaming;
+}
+EXPORT_SYMBOL_GPL(mtk_fd_ctx_is_streaming);
+
+static int mtk_fd_ctx_free_frame(struct mtk_fd_ctx *dev_ctx,
+				 struct mtk_fd_ctx_frame_bundle *frame_bundle)
+{
+	spin_lock(&dev_ctx->qlock);
+
+	frame_bundle->state = MTK_FD_CTX_FRAME_NEW;
+	list_del(&frame_bundle->list);
+	list_add_tail(&frame_bundle->list, &dev_ctx->free_frames.list);
+
+	spin_unlock(&dev_ctx->qlock);
+
+	return 0;
+}
+
+int mtk_fd_ctx_core_job_finish(struct mtk_fd_ctx *dev_ctx,
+			       struct mtk_fd_ctx_finish_param *param)
+{
+	int i = 0;
+	struct platform_device *pdev = dev_ctx->pdev;
+	struct mtk_fd_ctx_finish_param *fram_param =
+		(struct mtk_fd_ctx_finish_param *)param;
+	struct mtk_fd_dev *fd_dev = NULL;
+	struct mtk_fd_ctx_frame_bundle *frame = NULL;
+	enum vb2_buffer_state vbf_state = VB2_BUF_STATE_DONE;
+	enum mtk_fd_ctx_buffer_state ctxf_state =
+		MTK_FD_CTX_BUFFER_DONE;
+	int user_sequence = 0;
+
+	const int ctx_id =
+		MTK_FD_GET_CTX_ID_FROM_SEQUENCE(fram_param->frame_id);
+	u64 timestamp = 0;
+
+	pr_debug("mtk_fd_ctx_core_job_finish_cb: param (%llx), platform_device(%llx)\n",
+		 (unsigned long long)param, (unsigned long long)pdev);
+
+	if (!dev_ctx)
+		pr_err("dev_ctx can't be null, can't release the frame\n");
+
+	fd_dev = mtk_fd_ctx_to_dev(dev_ctx);
+
+	if (fram_param) {
+		dev_info(&fd_dev->pdev->dev,
+			 "CB recvied from ctx(%d), frame(%d), state(%d), fd_dev(%llx)\n",
+			 ctx_id, fram_param->frame_id,
+			 fram_param->state, (long long)fd_dev);
+	} else {
+		dev_err(&fd_dev->pdev->dev,
+			"CB recvied from ctx(%d), frame param is NULL\n",
+			ctx_id);
+			return -EINVAL;
+	}
+
+	/* Get the buffers of the processed frame */
+	frame = mtk_fd_ctx_get_processing_frame(&fd_dev->ctx,
+						fram_param->frame_id);
+
+	if (!frame) {
+		pr_err("Can't find the frame boundle, Frame(%d)\n",
+		       fram_param->frame_id);
+		return -EINVAL;
+	}
+
+	if (fram_param->state == MTK_FD_CTX_FRAME_DATA_ERROR) {
+		vbf_state = VB2_BUF_STATE_ERROR;
+		ctxf_state = MTK_FD_CTX_BUFFER_FAILED;
+	}
+
+	/**
+	 * Set the buffer's VB2 status so that
+	 * the user can dequeue the buffer
+	 */
+	timestamp = ktime_get_ns();
+	for (i = 0; i <= frame->last_index; i++) {
+		struct mtk_fd_ctx_buffer *ctx_buf = frame->buffers[i];
+
+		if (!ctx_buf) {
+			dev_dbg(&fd_dev->pdev->dev,
+				"ctx_buf(queue id= %d) of frame(%d)is NULL\n",
+				i, fram_param->frame_id);
+			continue;
+		} else {
+			struct vb2_v4l2_buffer *b =
+				mtk_fd_ctx_buffer_get_vb2_v4l2_buffer(ctx_buf);
+			b->vb2_buf.timestamp = ktime_get_ns();
+			user_sequence = ctx_buf->user_sequence;
+			mtk_fd_ctx_buffer_done(ctx_buf, ctxf_state);
+			mtk_fd_v4l2_buffer_done(&b->vb2_buf, vbf_state);
+		}
+	}
+
+	mtk_fd_ctx_free_frame(&fd_dev->ctx, frame);
+	return 0;
+}
+EXPORT_SYMBOL_GPL(mtk_fd_ctx_core_job_finish);
+
+int mtk_fd_ctx_finish_frame(struct mtk_fd_ctx *dev_ctx,
+			    struct mtk_fd_ctx_frame_bundle *frame_bundle,
+			    int done)
+{
+	spin_lock(&dev_ctx->qlock);
+	frame_bundle->state = MTK_FD_CTX_FRAME_PROCESSING;
+	list_add_tail(&frame_bundle->list, &dev_ctx->processing_frames.list);
+	spin_unlock(&dev_ctx->qlock);
+	return 0;
+}
+
+static void set_img_fmt(struct v4l2_pix_format_mplane *mfmt_to_fill,
+			struct mtk_fd_ctx_format *ctx_fmt)
+{
+	int i = 0;
+
+	mfmt_to_fill->pixelformat = ctx_fmt->fmt.img.pixelformat;
+	mfmt_to_fill->num_planes = ctx_fmt->fmt.img.num_planes;
+
+	pr_info("%s: Fmt(%d),w(%d),h(%d)\n",
+		__func__,
+		mfmt_to_fill->pixelformat,
+		mfmt_to_fill->width,
+		mfmt_to_fill->height);
+
+	/**
+	 * The implementation wil be adjust after integrating MDP module
+	 * since it provides the common format suppporting function
+	 */
+	for (i = 0 ; i < mfmt_to_fill->num_planes; ++i) {
+		int bpl = (mfmt_to_fill->width *
+			   ctx_fmt->fmt.img.row_depth[i]) / 8;
+		int sizeimage = (mfmt_to_fill->width * mfmt_to_fill->height *
+				 ctx_fmt->fmt.img.depth[i]) / 8;
+
+		mfmt_to_fill->plane_fmt[i].bytesperline = bpl;
+		mfmt_to_fill->plane_fmt[i].sizeimage = sizeimage;
+		pr_info("plane(%d):bpl(%d),sizeimage(%u)\n",
+			i, bpl, mfmt_to_fill->plane_fmt[i].sizeimage);
+	}
+}
+
+static void set_meta_fmt(struct v4l2_meta_format *metafmt_to_fill,
+			 struct mtk_fd_ctx_format *ctx_fmt)
+{
+	metafmt_to_fill->dataformat = ctx_fmt->fmt.meta.dataformat;
+
+	if (ctx_fmt->fmt.meta.max_buffer_size <= 0 ||
+	    ctx_fmt->fmt.meta.max_buffer_size >
+	    MTK_FD_CTX_META_BUF_DEFAULT_SIZE) {
+		pr_warn("buf size of meta(%u) can't be 0, use default %u\n",
+			ctx_fmt->fmt.meta.dataformat,
+			MTK_FD_CTX_META_BUF_DEFAULT_SIZE);
+		metafmt_to_fill->buffersize = MTK_FD_CTX_META_BUF_DEFAULT_SIZE;
+	} else {
+		pr_info("Load the meta size setting %u\n",
+			ctx_fmt->fmt.meta.max_buffer_size);
+		metafmt_to_fill->buffersize = ctx_fmt->fmt.meta.max_buffer_size;
+	}
+}
+
+/* Get the default format setting */
+int mtk_fd_ctx_format_load_default_fmt(struct mtk_fd_ctx_queue *queue,
+				       struct v4l2_format *fmt_to_fill)
+{
+	struct mtk_fd_ctx_format *ctx_fmt = NULL;
+
+	if (queue->desc.num_fmts == 0)
+		return 0; /* no format support list associated to this queue */
+
+	if (queue->desc.default_fmt_idx >= queue->desc.num_fmts) {
+		pr_warn("Queue(%s) err: default idx(%d) must < num_fmts(%d)\n",
+			queue->desc.name, queue->desc.default_fmt_idx,
+			queue->desc.num_fmts);
+		queue->desc.default_fmt_idx = 0;
+		pr_warn("Queue(%s) : reset default idx(%d)\n",
+			queue->desc.name, queue->desc.default_fmt_idx);
+	}
+
+	ctx_fmt	= &queue->desc.fmts[queue->desc.default_fmt_idx];
+
+	/* Check the type of the buffer */
+	if (queue->desc.image) {
+		struct v4l2_pix_format_mplane *node_fmt =
+			&fmt_to_fill->fmt.pix_mp;
+
+		if (queue->desc.capture) {
+			fmt_to_fill->type = V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE;
+			node_fmt->width = MTK_FD_OUTPUT_MAX_WIDTH;
+			node_fmt->height = MTK_FD_OUTPUT_MAX_HEIGHT;
+		} else {
+			fmt_to_fill->type = V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE;
+			node_fmt->width = MTK_FD_INPUT_MAX_WIDTH;
+			node_fmt->height = MTK_FD_INPUT_MAX_HEIGHT;
+		}
+		set_img_fmt(node_fmt, ctx_fmt);
+	}	else {
+		/* meta buffer type */
+		struct v4l2_meta_format *node_fmt = &fmt_to_fill->fmt.meta;
+
+		if (queue->desc.capture)
+			fmt_to_fill->type = V4L2_BUF_TYPE_META_CAPTURE;
+		else
+			fmt_to_fill->type = V4L2_BUF_TYPE_META_OUTPUT;
+
+		set_meta_fmt(node_fmt, ctx_fmt);
+	}
+	return 0;
+}
+EXPORT_SYMBOL_GPL(mtk_fd_ctx_format_load_default_fmt);
+
+static struct mtk_fd_ctx_format *mtk_fd_ctx_find_fmt
+	(struct mtk_fd_ctx_queue *queue, u32 format)
+{
+	int i;
+	struct mtk_fd_ctx_format *ctx_fmt;
+
+	for (i = 0; i < queue->desc.num_fmts; i++) {
+		ctx_fmt = &queue->desc.fmts[i];
+		if (queue->desc.image) {
+			pr_debug("idx(%d), pixelformat(%x), fmt(%x)\n",
+				 i, ctx_fmt->fmt.img.pixelformat, format);
+			if (ctx_fmt->fmt.img.pixelformat == format)
+				return ctx_fmt;
+		} else {
+			if (ctx_fmt->fmt.meta.dataformat == format)
+				return ctx_fmt;
+		}
+	}
+	return NULL;
+}
+
+int mtk_fd_ctx_fmt_set_meta(struct mtk_fd_ctx *dev_ctx, int queue_id,
+			    struct v4l2_meta_format *user_fmt,
+			    struct v4l2_meta_format *node_fmt)
+{
+	struct mtk_fd_ctx_queue *queue = NULL;
+	struct mtk_fd_ctx_format *ctx_fmt;
+
+	if (queue_id >= dev_ctx->queues_attr.total_num) {
+		pr_err("Invalid queue id:%d\n", queue_id);
+		return -EINVAL;
+	}
+
+	queue = &dev_ctx->queue[queue_id];
+	if (!user_fmt || !node_fmt)
+		return -EINVAL;
+
+	ctx_fmt = mtk_fd_ctx_find_fmt(queue, user_fmt->dataformat);
+	if (!ctx_fmt)
+		return -EINVAL;
+
+	queue->ctx_fmt = ctx_fmt;
+	set_meta_fmt(node_fmt, ctx_fmt);
+	*user_fmt = *node_fmt;
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(mtk_fd_ctx_fmt_set_meta);
+
+int mtk_fd_ctx_fmt_set_img(struct mtk_fd_ctx *dev_ctx, int queue_id,
+			   struct v4l2_pix_format_mplane *user_fmt,
+			   struct v4l2_pix_format_mplane *node_fmt)
+{
+	struct mtk_fd_ctx_queue *queue = NULL;
+	struct mtk_fd_ctx_format *ctx_fmt;
+
+	if (queue_id >= dev_ctx->queues_attr.total_num) {
+		pr_err("Invalid queue id:%d\n", queue_id);
+		return -EINVAL;
+	}
+
+	queue = &dev_ctx->queue[queue_id];
+	if (!user_fmt || !node_fmt)
+		return -EINVAL;
+
+	ctx_fmt = mtk_fd_ctx_find_fmt(queue, user_fmt->pixelformat);
+	if (!ctx_fmt)
+		return -EINVAL;
+
+	queue->ctx_fmt = ctx_fmt;
+	node_fmt->width = user_fmt->width;
+	node_fmt->height = user_fmt->height;
+
+	set_img_fmt(node_fmt, ctx_fmt);
+
+	*user_fmt = *node_fmt;
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(mtk_fd_ctx_fmt_set_img);
+
+int mtk_fd_ctx_streamon(struct mtk_fd_ctx *dev_ctx)
+{
+	int ret = 0;
+
+	if (dev_ctx->streaming) {
+		pr_warn("stream on failed, pdev(%llx), ctx(%d) already stream on\n",
+			(long long)dev_ctx->pdev, dev_ctx->ctx_id);
+		return -EBUSY;
+	}
+
+	ret = mtk_fd_streamon(dev_ctx->pdev, dev_ctx->ctx_id);
+	if (ret) {
+		pr_err("streamon: ctx(%d) failed, notified by context\n",
+		       dev_ctx->ctx_id);
+		return -EBUSY;
+	}
+
+	dev_ctx->streaming = true;
+	ret = mtk_fd_dev_queue_buffers(mtk_fd_ctx_to_dev(dev_ctx), true);
+	if (ret)
+		pr_err("failed to queue initial buffers (%d)", ret);
+
+	return ret;
+}
+EXPORT_SYMBOL_GPL(mtk_fd_ctx_streamon);
+
+int mtk_fd_ctx_streamoff(struct mtk_fd_ctx *dev_ctx)
+{
+	int ret = 0;
+
+	if (!dev_ctx->streaming) {
+		pr_warn("Do nothing, pdev(%llx), ctx(%d) is already stream off\n",
+			(long long)dev_ctx->pdev, dev_ctx->ctx_id);
+		return -EBUSY;
+	}
+
+	ret = mtk_fd_streamoff(dev_ctx->pdev, dev_ctx->ctx_id);
+	if (ret) {
+		pr_warn("streamoff: ctx(%d) failed, notified by context\n",
+			dev_ctx->ctx_id);
+		return -EBUSY;
+	}
+
+	dev_ctx->streaming = false;
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(mtk_fd_ctx_streamoff);
+
+int mtk_fd_ctx_init_frame_bundles(struct mtk_fd_ctx *dev_ctx)
+{
+	int i = 0;
+
+	dev_ctx->num_frame_bundle = VB2_MAX_FRAME;
+
+	spin_lock(&dev_ctx->qlock);
+
+	/* Reset the queue*/
+	INIT_LIST_HEAD(&dev_ctx->processing_frames.list);
+	INIT_LIST_HEAD(&dev_ctx->free_frames.list);
+
+	for (i = 0; i < dev_ctx->num_frame_bundle; i++) {
+		struct mtk_fd_ctx_frame_bundle *frame_bundle =
+			&dev_ctx->frame_bundles[i];
+		frame_bundle->state = MTK_FD_CTX_FRAME_NEW;
+		list_add_tail(&frame_bundle->list, &dev_ctx->free_frames.list);
+	}
+
+	spin_unlock(&dev_ctx->qlock);
+
+	return 0;
+}
+
+int mtk_fd_ctx_open(struct mtk_fd_ctx *dev_ctx)
+{
+	struct mtk_fd_dev *fd_dev = mtk_fd_ctx_to_dev(dev_ctx);
+	unsigned int enabled_dma_ports = 0;
+	int i = 0;
+
+	if (!dev_ctx)
+		return -EINVAL;
+
+	/* Get the enabled DMA ports */
+	for (i = 0; i < fd_dev->mem2mem2.num_nodes; i++) {
+		if (fd_dev->mem2mem2.nodes[i].enabled)
+			enabled_dma_ports |= dev_ctx->queue[i].desc.dma_port;
+	}
+
+	dev_ctx->enabled_dma_ports = enabled_dma_ports;
+
+	dev_dbg(&fd_dev->pdev->dev, "open device: (%llx)\n",
+		(long long)&fd_dev->pdev->dev);
+
+	/* Workaround for SCP EMI access */
+	mtk_fd_smem_enable_mpu(&dev_ctx->smem_device->dev);
+
+	/* Init the frame bundle pool */
+	mtk_fd_ctx_init_frame_bundles(dev_ctx);
+
+	return mtk_fd_open(dev_ctx->pdev);
+}
+EXPORT_SYMBOL_GPL(mtk_fd_ctx_open);
+
+int mtk_fd_ctx_release(struct mtk_fd_ctx *dev_ctx)
+{
+	return mtk_fd_release(dev_ctx->pdev);
+}
+EXPORT_SYMBOL_GPL(mtk_fd_ctx_release);
+
+static int mtk_fd_ctx_core_job_start(struct mtk_fd_ctx *dev_ctx,
+				     struct mtk_fd_ctx_frame_bundle *bundle)
+{
+	struct platform_device *pdev = dev_ctx->pdev;
+	int ret = 0;
+	struct v4l2_fd_param fd_param;
+	struct mtk_fd_ctx_buffer *ctx_buf_yuv_in = NULL;
+	struct mtk_fd_ctx_buffer *ctx_buf_meta_in = NULL;
+	struct mtk_fd_ctx_buffer *ctx_buf_meta_out = NULL;
+
+	if (!pdev || !bundle) {
+		dev_err(&pdev->dev,
+			"pdev(%llx) and param(%llx) in start can't be NULL\n",
+			(long long)pdev, (long long)bundle);
+		return -EINVAL;
+	}
+	memset(&fd_param, 0, sizeof(struct v4l2_fd_param));
+	fd_param.frame_id = bundle->id;
+
+	/* Img-in buffer */
+	ctx_buf_yuv_in = bundle->buffers[MTK_FD_CTX_FD_YUV_IN];
+	if (ctx_buf_yuv_in) {
+		fd_param.src_img.iova =	(uint32_t)ctx_buf_yuv_in->daddr;
+		fd_param.src_img.va = (uint64_t)ctx_buf_yuv_in->vaddr;
+		fd_param.src_img_h =
+			(uint16_t)ctx_buf_yuv_in->fmt.pix_mp.height;
+		fd_param.src_img_w =
+			(uint16_t)ctx_buf_yuv_in->fmt.pix_mp.width;
+	}
+
+	/* Meta-in buffer */
+	ctx_buf_meta_in = bundle->buffers[MTK_FD_CTX_FD_CONFIG_IN];
+	if (ctx_buf_meta_in) {
+		fd_param.fd_user_param.va = (uint64_t)ctx_buf_meta_in->vaddr;
+		fd_param.fd_user_param.pa = (uint32_t)ctx_buf_meta_in->paddr;
+		fd_param.fd_user_param.iova = (uint32_t)ctx_buf_meta_in->daddr;
+	} else {
+		dev_err(&pdev->dev, "meta in is null!\n");
+		fd_param.fd_user_param.pa = 0;
+		fd_param.fd_user_param.va = 0;
+		fd_param.fd_user_param.iova = 0;
+	}
+
+	/* Meta-out buffer */
+	ctx_buf_meta_out = bundle->buffers[MTK_FD_CTX_FD_OUT];
+	if (ctx_buf_meta_out) {
+		fd_param.fd_user_result.va = (uint64_t)ctx_buf_meta_out->vaddr;
+		fd_param.fd_user_result.pa = (uint32_t)ctx_buf_meta_out->paddr;
+		fd_param.fd_user_result.iova =
+					(uint32_t)ctx_buf_meta_out->daddr;
+	} else {
+		dev_err(&pdev->dev, "meta out is null!\n");
+		fd_param.fd_user_result.pa = 0;
+		fd_param.fd_user_result.va = 0;
+		fd_param.fd_user_result.iova = 0;
+	}
+
+	dev_info(&pdev->dev,
+		 "Delegate job to mtk_fd_enqueue: pdev(0x%llx), frame(%d)\n",
+		 (long long)pdev, bundle->id);
+	ret = mtk_fd_enqueue(pdev, &fd_param);
+
+	if (ret) {
+		dev_warn(&pdev->dev, "mtk_fd_enqueue failed: %d\n", ret);
+		return -EBUSY;
+	}
+
+	return 0;
+}
+
+static void debug_bundle(struct mtk_fd_ctx_frame_bundle *bundle_data)
+{
+	int i = 0;
+
+	if (!bundle_data) {
+		pr_warn("bundle_data is NULL\n");
+		return;
+	}
+
+	pr_debug("bundle buf nums (%d, %d,%d,%d)\n",
+		 bundle_data->num_img_capture_bufs,
+		 bundle_data->num_img_output_bufs,
+		 bundle_data->num_meta_capture_bufs,
+		 bundle_data->num_meta_output_bufs);
+
+	for (i = 0; i < 16 ; i++) {
+		pr_debug("Bundle, buf[%d] = %llx\n",
+			 i,
+			 (unsigned long long)bundle_data->buffers[i]);
+	}
+
+	pr_debug("Bundle last idx: %d\n", bundle_data->last_index);
+}
+
+static struct mtk_fd_ctx_frame_bundle *mtk_fd_ctx_get_free_frame
+	(struct mtk_fd_ctx *dev_ctx)
+{
+	struct mtk_fd_ctx_frame_bundle *frame_bundle = NULL;
+
+	spin_lock(&dev_ctx->qlock);
+	list_for_each_entry(frame_bundle,
+			    &dev_ctx->free_frames.list, list){
+		pr_debug("Check frame: state %d, new should be %d\n",
+			 frame_bundle->state, MTK_FD_CTX_FRAME_NEW);
+		if (frame_bundle->state == MTK_FD_CTX_FRAME_NEW) {
+			frame_bundle->state = MTK_FD_CTX_FRAME_PREPARED;
+			pr_debug("Found free frame\n");
+			spin_unlock(&dev_ctx->qlock);
+			return frame_bundle;
+		}
+	}
+	spin_unlock(&dev_ctx->qlock);
+	pr_err("Can't found any bundle is MTK_FD_CTX_FRAME_NEW\n");
+	return NULL;
+}
+
+static int mtk_fd_ctx_process_frame
+	(struct mtk_fd_ctx *dev_ctx,
+	 struct mtk_fd_ctx_frame_bundle *frame_bundle)
+{
+	spin_lock(&dev_ctx->qlock);
+
+	frame_bundle->state = MTK_FD_CTX_FRAME_PROCESSING;
+	list_del(&frame_bundle->list);
+	list_add_tail(&frame_bundle->list, &dev_ctx->processing_frames.list);
+
+	spin_unlock(&dev_ctx->qlock);
+	return 0;
+}
+
+int mtk_fd_ctx_trigger_job(struct mtk_fd_ctx  *dev_ctx,
+			   struct mtk_fd_ctx_frame_bundle *bundle_data)
+{
+	/* Scan all buffers and filled the ipi frame data*/
+	int i = 0;
+	struct mtk_fd_ctx_finish_param fram_param;
+
+	struct mtk_fd_ctx_frame_bundle *bundle =
+		mtk_fd_ctx_get_free_frame(dev_ctx);
+
+	pr_debug("Bundle data: , ctx id:%d\n",
+		 dev_ctx->ctx_id);
+
+	debug_bundle(bundle_data);
+
+	if (!bundle) {
+		pr_err("bundle can't be NULL\n");
+		goto FAILE_JOB_NOT_TRIGGER;
+	}
+	if (!bundle_data) {
+		pr_err("bundle_data can't be NULL\n");
+		goto FAILE_JOB_NOT_TRIGGER;
+	}
+
+	pr_debug("Copy bundle_data->buffers to bundle->buffers\n");
+	memcpy(bundle->buffers, bundle_data->buffers,
+	       sizeof(struct mtk_fd_ctx_buffer *) *
+	       MTK_FD_CTX_FRAME_BUNDLE_BUFFER_MAX);
+
+	pr_debug("bundle setup (%d, %d,%d,%d)\n",
+		 bundle_data->num_img_capture_bufs,
+		 bundle_data->num_img_output_bufs,
+		 bundle_data->num_meta_capture_bufs,
+		 bundle_data->num_meta_output_bufs);
+
+	bundle->num_img_capture_bufs = bundle_data->num_img_capture_bufs;
+	bundle->num_img_output_bufs = bundle_data->num_img_output_bufs;
+	bundle->num_meta_capture_bufs = bundle_data->num_meta_capture_bufs;
+	bundle->num_meta_output_bufs = bundle_data->num_meta_output_bufs;
+	bundle->id = mtk_fd_ctx_next_global_frame_sequence(dev_ctx,
+							   dev_ctx->ctx_id);
+	bundle->last_index = dev_ctx->queues_attr.total_num - 1;
+
+	debug_bundle(bundle);
+
+	pr_debug("Fill Address data\n");
+	for (i = 0; i <= bundle->last_index; i++) {
+		struct mtk_fd_ctx_buffer *ctx_buf = bundle->buffers[i];
+		struct vb2_v4l2_buffer *b = NULL;
+
+		pr_debug("Process queue[%d], ctx_buf:(%llx)\n",
+			 i, (unsigned long long)ctx_buf);
+
+		if (!ctx_buf) {
+			pr_warn("queue[%d], ctx_buf is NULL!!\n", i);
+			continue;
+		}
+
+		pr_debug("Get VB2 V4L2 buffer\n");
+		b = mtk_fd_ctx_buffer_get_vb2_v4l2_buffer(ctx_buf);
+
+		ctx_buf->image = dev_ctx->queue[ctx_buf->queue].desc.image;
+		ctx_buf->capture = dev_ctx->queue[ctx_buf->queue].desc.capture;
+		/* copy the fmt setting for queue's fmt*/
+		ctx_buf->fmt = dev_ctx->queue[ctx_buf->queue].fmt;
+		ctx_buf->ctx_fmt = dev_ctx->queue[ctx_buf->queue].ctx_fmt;
+			ctx_buf->frame_id = bundle->id;
+		ctx_buf->daddr =
+			vb2_dma_contig_plane_dma_addr(&b->vb2_buf, 0);
+		pr_debug("%s:vb2_buf: type(%d),idx(%d),mem(%d)\n",
+			 __func__,
+			 b->vb2_buf.type,
+			 b->vb2_buf.index,
+			 b->vb2_buf.memory);
+		ctx_buf->vaddr = vb2_plane_vaddr(&b->vb2_buf, 0);
+		ctx_buf->buffer_usage = dev_ctx->queue[i].buffer_usage;
+		ctx_buf->rotation = dev_ctx->queue[i].rotation;
+		pr_debug("Buf: queue(%d), vaddr(%llx), daddr(%llx)",
+			 ctx_buf->queue, (unsigned long long)ctx_buf->vaddr,
+			 (unsigned long long)ctx_buf->daddr);
+
+		if (!ctx_buf->image) {
+			ctx_buf->paddr =
+				mtk_fd_smem_iova_to_phys
+					(&dev_ctx->smem_device->dev,
+					 ctx_buf->daddr);
+		} else {
+			pr_debug("No pa: it is a image buffer\n");
+			ctx_buf->paddr = 0;
+		}
+		ctx_buf->state = MTK_FD_CTX_BUFFER_PROCESSING;
+	}
+
+	if (mtk_fd_ctx_process_frame(dev_ctx, bundle)) {
+		pr_err("mtk_fd_ctx_process_frame failed: frame(%d)\n",
+		       bundle->id);
+		goto FAILE_JOB_NOT_TRIGGER;
+	}
+
+	if (dev_ctx->mode == MTK_FD_CTX_MODE_DEBUG_BYPASS_JOB_TRIGGER) {
+		memset(&fram_param, 0, sizeof(struct mtk_fd_ctx_finish_param));
+		fram_param.frame_id = bundle->id;
+		fram_param.state = MTK_FD_CTX_FRAME_DATA_DONE;
+		pr_debug("Ctx(%d) in HW bypass mode, will not trigger hw\n",
+			 dev_ctx->ctx_id);
+
+		mtk_fd_ctx_core_job_finish(dev_ctx,	(void *)&fram_param);
+		return 0;
+	}
+
+	if (mtk_fd_ctx_core_job_start(dev_ctx, bundle))
+		goto FAILE_JOB_NOT_TRIGGER;
+	return 0;
+
+FAILE_JOB_NOT_TRIGGER:
+	pr_debug("FAILE_JOB_NOT_TRIGGER: init fram_param: %llx\n",
+		 (unsigned long long)&fram_param);
+	memset(&fram_param, 0, sizeof(struct mtk_fd_ctx_finish_param));
+	fram_param.frame_id = bundle->id;
+	fram_param.state = MTK_FD_CTX_FRAME_DATA_ERROR;
+	pr_debug("Call mtk_fd_ctx_core_job_finish_cb: fram_param: %llx",
+		 (unsigned long long)&fram_param);
+	mtk_fd_ctx_core_job_finish(dev_ctx, (void *)&fram_param);
+
+	return -EINVAL;
+}
+EXPORT_SYMBOL_GPL(mtk_fd_ctx_trigger_job);
diff --git a/drivers/media/platform/mtk-isp/fd/mtk_fd-dev.c b/drivers/media/platform/mtk-isp/fd/mtk_fd-dev.c
new file mode 100644
index 0000000..7e3acf7
--- /dev/null
+++ b/drivers/media/platform/mtk-isp/fd/mtk_fd-dev.c
@@ -0,0 +1,355 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (c) 2018 Mediatek Corporation.
+ * Copyright (c) 2017 Intel Corporation.
+ * Copyright (C) 2017 Google, Inc.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License version
+ * 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * MTK_FD-dev is highly based on Intel IPU 3 chrome driver
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/device.h>
+#include <linux/pm_runtime.h>
+#include <linux/of.h>
+#include <linux/of_platform.h>
+#include <linux/platform_device.h>
+#include <media/videobuf2-dma-contig.h>
+#include "mtk_fd-dev.h"
+
+static struct platform_device *mtk_fd_dev_of_find_smem_dev
+	(struct platform_device *pdev);
+
+/* Initliaze a mtk_fd_dev representing a completed HW FD */
+/* device */
+int mtk_fd_dev_init(struct mtk_fd_dev *fd_dev,
+		    struct platform_device *pdev,
+		    struct media_device *media_dev,
+		    struct v4l2_device *v4l2_dev)
+{
+	int r = 0;
+
+	fd_dev->pdev = pdev;
+
+	mutex_init(&fd_dev->lock);
+	atomic_set(&fd_dev->qbuf_barrier, 0);
+	init_waitqueue_head(&fd_dev->buf_drain_wq);
+
+	/* v4l2 sub-device registration */
+	r = mtk_fd_dev_mem2mem2_init(fd_dev, media_dev, v4l2_dev);
+
+	if (r) {
+		dev_err(&fd_dev->pdev->dev,
+			"failed to create V4L2 devices (%d)\n", r);
+		goto failed_mem2mem2;
+	}
+
+	return 0;
+
+failed_mem2mem2:
+	mutex_destroy(&fd_dev->lock);
+	return r;
+}
+
+int mtk_fd_dev_get_total_node(struct mtk_fd_dev *mtk_fd_dev)
+{
+	return mtk_fd_dev->ctx.queues_attr.total_num;
+}
+
+int mtk_fd_dev_mem2mem2_init(struct mtk_fd_dev *fd_dev,
+			     struct media_device *media_dev,
+			     struct v4l2_device *v4l2_dev)
+{
+	int r, i;
+	const int queue_master = fd_dev->ctx.queues_attr.master;
+
+	pr_info("mem2mem2.name: %s\n", fd_dev->ctx.device_name);
+	fd_dev->mem2mem2.name = fd_dev->ctx.device_name;
+	fd_dev->mem2mem2.model = fd_dev->ctx.device_name;
+	fd_dev->mem2mem2.num_nodes =
+		mtk_fd_dev_get_total_node(fd_dev);
+	fd_dev->mem2mem2.vb2_mem_ops = &vb2_dma_contig_memops;
+	fd_dev->mem2mem2.buf_struct_size =
+		sizeof(struct mtk_fd_dev_buffer);
+
+	fd_dev->mem2mem2.nodes = fd_dev->mem2mem2_nodes;
+	fd_dev->mem2mem2.dev = &fd_dev->pdev->dev;
+
+	for (i = 0; i < fd_dev->ctx.dev_node_num; i++) {
+		fd_dev->mem2mem2.nodes[i].name =
+			mtk_fd_dev_get_node_name(fd_dev, i);
+		fd_dev->mem2mem2.nodes[i].output =
+				(!fd_dev->ctx.queue[i].desc.capture);
+		fd_dev->mem2mem2.nodes[i].immutable = false;
+		fd_dev->mem2mem2.nodes[i].enabled = false;
+		atomic_set(&fd_dev->mem2mem2.nodes[i].sequence, 0);
+	}
+
+	/* Master queue is always enabled */
+	fd_dev->mem2mem2.nodes[queue_master].immutable = true;
+	fd_dev->mem2mem2.nodes[queue_master].enabled = true;
+
+	pr_info("register v4l2 for %llx\n",
+		(unsigned long long)fd_dev);
+	r = mtk_fd_mem2mem2_v4l2_register(fd_dev, media_dev, v4l2_dev);
+
+	if (r) {
+		pr_err("v4l2 init failed, dev(ctx:%d)\n", fd_dev->ctx.ctx_id);
+		return r;
+	}
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(mtk_fd_dev_mem2mem2_init);
+
+void mtk_fd_dev_mem2mem2_exit(struct mtk_fd_dev *fd_dev)
+{
+	mtk_fd_v4l2_unregister(fd_dev);
+}
+EXPORT_SYMBOL_GPL(mtk_fd_dev_mem2mem2_exit);
+
+char *mtk_fd_dev_get_node_name
+	(struct mtk_fd_dev *fd_dev, int node)
+{
+	struct mtk_fd_ctx_queue_desc *mapped_queue_desc =
+		&fd_dev->ctx.queue[node].desc;
+
+	return mapped_queue_desc->name;
+}
+
+/* Get a free buffer from a video node */
+static struct mtk_fd_ctx_buffer __maybe_unused *mtk_fd_dev_queue_getbuf
+	(struct mtk_fd_dev *fd_dev, int node)
+{
+	struct mtk_fd_dev_buffer *buf;
+	int queue = -1;
+
+	if (node > fd_dev->ctx.dev_node_num || node < 0) {
+		dev_err(&fd_dev->pdev->dev, "Invalid mtk_fd_dev node.\n");
+		return NULL;
+	}
+
+	/* Get the corrosponding queue id of the video node */
+	/* Currently the queue id is the same as the node number */
+	queue = node;
+
+	if (queue < 0) {
+		dev_err(&fd_dev->pdev->dev, "Invalid mtk_fd_dev node.\n");
+		return NULL;
+	}
+
+	/* Find first free buffer from the node */
+	list_for_each_entry(buf, &fd_dev->mem2mem2.nodes[node].buffers,
+			    m2m2_buf.list) {
+		if (mtk_fd_ctx_get_buffer_state(&buf->ctx_buf)
+			== MTK_FD_CTX_BUFFER_NEW)
+			return &buf->ctx_buf;
+	}
+
+	/* There were no free buffers*/
+	return NULL;
+}
+
+int mtk_fd_dev_get_queue_id_of_dev_node(struct mtk_fd_dev *fd_dev,
+					struct mtk_fd_dev_video_device *node)
+{
+	return (node - fd_dev->mem2mem2.nodes);
+}
+EXPORT_SYMBOL_GPL(mtk_fd_dev_get_queue_id_of_dev_node);
+
+int mtk_fd_dev_queue_buffers(struct mtk_fd_dev *fd_dev,
+			     bool initial)
+{
+	unsigned int node;
+	int r = 0;
+	struct mtk_fd_dev_buffer *ibuf;
+	struct mtk_fd_ctx_frame_bundle bundle;
+	const int mtk_fd_dev_node_num = mtk_fd_dev_get_total_node(fd_dev);
+	const int queue_master = fd_dev->ctx.queues_attr.master;
+
+	memset(&bundle, 0, sizeof(struct mtk_fd_ctx_frame_bundle));
+
+	pr_info("%s, init(%d)\n", __func__, initial);
+
+	if (!mtk_fd_ctx_is_streaming(&fd_dev->ctx)) {
+		pr_info("%s: stream off, no hw enqueue triggered\n", __func__);
+		return 0;
+	}
+
+	mutex_lock(&fd_dev->lock);
+
+	/* Buffer set is queued to background driver (e.g. DIP, FD, and P1) */
+	/* only when master input buffer is ready */
+	if (!mtk_fd_dev_queue_getbuf(fd_dev, queue_master)) {
+		mutex_unlock(&fd_dev->lock);
+		return 0;
+	}
+
+	/* Check all node from the node after the master node */
+	for (node = (queue_master + 1) % mtk_fd_dev_node_num;
+		1; node = (node + 1) % mtk_fd_dev_node_num) {
+		pr_info("Check node(%d), queue enabled(%d), node enabled(%d)\n",
+			node, fd_dev->queue_enabled[node],
+			fd_dev->mem2mem2.nodes[node].enabled);
+
+		/* May skip some node according the scenario in the future */
+		if (fd_dev->queue_enabled[node] ||
+		    fd_dev->mem2mem2.nodes[node].enabled) {
+			struct mtk_fd_ctx_buffer *buf =
+				mtk_fd_dev_queue_getbuf(fd_dev, node);
+			char *node_name =
+				mtk_fd_dev_get_node_name(fd_dev, node);
+
+			if (!buf) {
+				dev_dbg(&fd_dev->pdev->dev,
+					"No free buffer of enabled node %s\n",
+					node_name);
+				break;
+			}
+
+			/* To show the debug message */
+			ibuf = container_of(buf,
+					    struct mtk_fd_dev_buffer, ctx_buf);
+			dev_dbg(&fd_dev->pdev->dev,
+				"may queue user %s buffer idx(%d) to ctx\n",
+				node_name,
+				ibuf->m2m2_buf.vbb.vb2_buf.index);
+			mtk_fd_ctx_frame_bundle_add(&fd_dev->ctx,
+						    &bundle, buf);
+		}
+
+		/* Stop if there is no free buffer in master input node */
+		if (node == queue_master) {
+			if (mtk_fd_dev_queue_getbuf(fd_dev, queue_master)) {
+				/* Has collected all buffer required */
+				mtk_fd_ctx_trigger_job(&fd_dev->ctx, &bundle);
+			} else {
+				pr_debug("no new buffer found in master node, not trigger job\n");
+				break;
+			}
+		}
+	}
+	mutex_unlock(&fd_dev->lock);
+
+	if (r && r != -EBUSY)
+		goto failed;
+
+	return 0;
+
+failed:
+	/*
+	 * On error, mark all buffers as failed which are not
+	 * yet queued to CSS
+	 */
+	dev_err(&fd_dev->pdev->dev,
+		"failed to queue buffer to ctx on queue %i (%d)\n",
+		node, r);
+
+	if (initial)
+		/* If we were called from streamon(), no need to finish bufs */
+		return r;
+
+	for (node = 0; node < mtk_fd_dev_node_num; node++) {
+		struct mtk_fd_dev_buffer *buf, *buf0;
+
+		if (!fd_dev->queue_enabled[node])
+			continue;	/* Skip disabled queues */
+
+		mutex_lock(&fd_dev->lock);
+		list_for_each_entry_safe
+			(buf, buf0,
+			 &fd_dev->mem2mem2.nodes[node].buffers,
+			 m2m2_buf.list) {
+			if (mtk_fd_ctx_get_buffer_state(&buf->ctx_buf) ==
+				MTK_FD_CTX_BUFFER_PROCESSING)
+				continue;	/* Was already queued, skip */
+
+			mtk_fd_v4l2_buffer_done(&buf->m2m2_buf.vbb.vb2_buf,
+						VB2_BUF_STATE_ERROR);
+		}
+		mutex_unlock(&fd_dev->lock);
+	}
+
+	return r;
+}
+EXPORT_SYMBOL_GPL(mtk_fd_dev_queue_buffers);
+
+int mtk_fd_dev_core_init(struct platform_device *pdev,
+			 struct mtk_fd_dev *fd_dev,
+			 struct mtk_fd_ctx_desc *ctx_desc)
+{
+	return mtk_fd_dev_core_init_ext(pdev,
+		fd_dev, ctx_desc, NULL, NULL);
+}
+EXPORT_SYMBOL_GPL(mtk_fd_dev_core_init);
+
+int mtk_fd_dev_core_init_ext(struct platform_device *pdev,
+			     struct mtk_fd_dev *fd_dev,
+			     struct mtk_fd_ctx_desc *ctx_desc,
+			     struct media_device *media_dev,
+			     struct v4l2_device *v4l2_dev)
+{
+	int r;
+	struct platform_device *smem_dev = NULL;
+
+	smem_dev = mtk_fd_dev_of_find_smem_dev(pdev);
+
+	if (!smem_dev)
+		dev_err(&pdev->dev, "failed to find smem_dev\n");
+
+	/* Device context must be initialized before device instance */
+	r = mtk_fd_ctx_core_init(&fd_dev->ctx, pdev,
+				 0, ctx_desc, pdev, smem_dev);
+
+	dev_info(&pdev->dev, "init fd_dev: %llx\n",
+		 (unsigned long long)fd_dev);
+	/* init other device level members */
+	mtk_fd_dev_init(fd_dev, pdev, media_dev, v4l2_dev);
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(mtk_fd_dev_core_init_ext);
+
+int mtk_fd_dev_core_release(struct platform_device *pdev,
+			    struct mtk_fd_dev *fd_dev)
+{
+	mtk_fd_dev_mem2mem2_exit(fd_dev);
+	mtk_fd_ctx_core_exit(&fd_dev->ctx);
+	mutex_destroy(&fd_dev->lock);
+	return 0;
+}
+EXPORT_SYMBOL_GPL(mtk_fd_dev_core_release);
+
+static struct platform_device *mtk_fd_dev_of_find_smem_dev
+	(struct platform_device *pdev)
+{
+	struct device_node *smem_dev_node = NULL;
+
+	if (!pdev) {
+		pr_err("Find_smem_dev failed, pdev can't be NULL\n");
+		return NULL;
+	}
+
+	smem_dev_node = of_parse_phandle(pdev->dev.of_node,
+					 "smem_device", 0);
+
+	if (!smem_dev_node) {
+		dev_err(&pdev->dev,
+			"failed to find isp smem device for (%s)\n",
+			pdev->name);
+		return NULL;
+	}
+
+	dev_dbg(&pdev->dev, "smem of node found, try to discovery device\n");
+	return of_find_device_by_node(smem_dev_node);
+}
+
diff --git a/drivers/media/platform/mtk-isp/fd/mtk_fd-dev.h b/drivers/media/platform/mtk-isp/fd/mtk_fd-dev.h
new file mode 100644
index 0000000..d2b7d77
--- /dev/null
+++ b/drivers/media/platform/mtk-isp/fd/mtk_fd-dev.h
@@ -0,0 +1,198 @@
+/* SPDX-License-Identifier: GPL-2.0
+ * Copyright (c) 2018 Mediatek Corporation.
+ * Copyright (c) 2017 Intel Corporation.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License version
+ * 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * MTK_FD-dev is highly based on Intel IPU 3 chrome driver
+ *
+ */
+
+#ifndef __MTK_FD_DEV_H__
+#define __MTK_FD_DEV_H__
+
+#include <linux/platform_device.h>
+#include <linux/version.h>
+#include <media/v4l2-device.h>
+#include <media/videobuf2-v4l2.h>
+#include "mtk_fd-ctx.h"
+
+/* Added the macro for early stage verification */
+/* based on kernel 4.4 environment. */
+/* I will remove the version check after getting */
+/* the devlopment platform based on 4.14 */
+#define MTK_FD_KERNEL_BASE_VERSION KERNEL_VERSION(4, 14, 0)
+
+#define MTK_FD_DEV_NODE_MAX			(MTK_FD_CTX_QUEUES)
+
+#define MTK_FD_INPUT_MIN_WIDTH		0U
+#define MTK_FD_INPUT_MIN_HEIGHT		0U
+#define MTK_FD_INPUT_MAX_WIDTH		480U
+#define MTK_FD_INPUT_MAX_HEIGHT		640U
+#define MTK_FD_OUTPUT_MIN_WIDTH		2U
+#define MTK_FD_OUTPUT_MIN_HEIGHT		2U
+#define MTK_FD_OUTPUT_MAX_WIDTH		480U
+#define MTK_FD_OUTPUT_MAX_HEIGHT		640U
+
+#define file_to_mtk_fd_node(__file) \
+	container_of(video_devdata(__file),\
+	struct mtk_fd_dev_video_device, vdev)
+
+#define mtk_fd_ctx_to_dev(__ctx) \
+	container_of(__ctx,\
+	struct mtk_fd_dev, ctx)
+
+#define mtk_fd_m2m_to_dev(__m2m) \
+	container_of(__m2m,\
+	struct mtk_fd_dev, mem2mem2)
+
+#define mtk_fd_subdev_to_dev(__sd) \
+	container_of(__sd, \
+	struct mtk_fd_dev, mem2mem2.subdev)
+
+#define mtk_fd_vbq_to_isp_node(__vq) \
+	container_of(__vq, \
+	struct mtk_fd_dev_video_device, vbq)
+
+#define mtk_fd_ctx_buf_to_dev_buf(__ctx_buf) \
+	container_of(__ctx_buf, \
+	struct mtk_fd_dev_buffer, ctx_buf)
+
+#define mtk_fd_vb2_buf_to_dev_buf(__vb) \
+	container_of(vb, \
+	struct mtk_fd_dev_buffer, \
+	m2m2_buf.vbb.vb2_buf)
+
+#define mtk_fd_vb2_buf_to_m2m_buf(__vb) \
+	container_of(__vb, \
+	struct mtk_fd_mem2mem2_buffer, \
+	vbb.vb2_buf)
+
+#define mtk_fd_subdev_to_m2m(__sd) \
+	container_of(__sd, \
+	struct mtk_fd_mem2mem2_device, subdev)
+
+struct mtk_fd_mem2mem2_device;
+
+struct mtk_fd_mem2mem2_buffer {
+	struct vb2_v4l2_buffer vbb;
+	struct list_head list;
+};
+
+struct mtk_fd_dev_buffer {
+	struct mtk_fd_mem2mem2_buffer m2m2_buf;
+	/* Intenal part */
+	struct mtk_fd_ctx_buffer ctx_buf;
+};
+
+struct mtk_fd_dev_video_device {
+	const char *name;
+	int output;
+	int immutable;
+	int enabled;
+	int queued;
+	struct v4l2_format vdev_fmt;
+	struct video_device vdev;
+	struct media_pad vdev_pad;
+	struct v4l2_mbus_framefmt pad_fmt;
+	struct vb2_queue vbq;
+	struct list_head buffers;
+	struct mutex lock; /* Protect node data */
+	atomic_t sequence;
+};
+
+struct mtk_fd_mem2mem2_device {
+	const char *name;
+	const char *model;
+	struct device *dev;
+	int num_nodes;
+	struct mtk_fd_dev_video_device *nodes;
+	const struct vb2_mem_ops *vb2_mem_ops;
+	unsigned int buf_struct_size;
+	int streaming;
+	struct v4l2_device *v4l2_dev;
+	struct media_device *media_dev;
+	struct media_pipeline pipeline;
+	struct v4l2_subdev subdev;
+	struct media_pad *subdev_pads;
+	struct v4l2_file_operations v4l2_file_ops;
+	const struct file_operations fops;
+};
+
+struct mtk_fd_dev {
+	struct platform_device *pdev;
+	struct mtk_fd_dev_video_device mem2mem2_nodes[MTK_FD_DEV_NODE_MAX];
+	int queue_enabled[MTK_FD_DEV_NODE_MAX];
+	struct mtk_fd_mem2mem2_device mem2mem2;
+	struct v4l2_device v4l2_dev;
+	struct media_device media_dev;
+	struct mtk_fd_ctx ctx;
+	struct mutex lock; /* queue protection */
+	atomic_t qbuf_barrier;
+	struct {
+		struct v4l2_rect eff;
+		struct v4l2_rect bds;
+		struct v4l2_rect gdc;
+	} rect;
+	int suspend_in_stream;
+	wait_queue_head_t buf_drain_wq;
+};
+
+int mtk_fd_media_register(struct device *dev,
+			  struct media_device *media_dev,
+			  const char *model);
+
+int mtk_fd_v4l2_register(struct device *dev,
+			 struct media_device *media_dev,
+			 struct v4l2_device *v4l2_dev);
+
+int mtk_fd_v4l2_unregister(struct mtk_fd_dev *dev);
+
+int mtk_fd_mem2mem2_v4l2_register(struct mtk_fd_dev *dev,
+				  struct media_device *media_dev,
+				  struct v4l2_device *v4l2_dev);
+
+void mtk_fd_v4l2_buffer_done(struct vb2_buffer *vb,
+			     enum vb2_buffer_state state);
+
+int mtk_fd_dev_queue_buffers(struct mtk_fd_dev *dev, bool initial);
+
+int mtk_fd_dev_get_total_node(struct mtk_fd_dev *mtk_fd_dev);
+
+char *mtk_fd_dev_get_node_name(struct mtk_fd_dev *mtk_fd_dev_obj, int node);
+
+int mtk_fd_dev_init(struct mtk_fd_dev *fd_dev,
+		    struct platform_device *pdev,
+		    struct media_device *media_dev,
+		    struct v4l2_device *v4l2_dev);
+
+void mtk_fd_dev_mem2mem2_exit(struct mtk_fd_dev *mtk_fd_dev_obj);
+
+int mtk_fd_dev_mem2mem2_init(struct mtk_fd_dev *fd_dev,
+			     struct media_device *media_dev,
+			     struct v4l2_device *v4l2_dev);
+
+int mtk_fd_dev_get_queue_id_of_dev_node(struct mtk_fd_dev *mtk_fd_dev_obj,
+					struct mtk_fd_dev_video_device *node);
+
+int mtk_fd_dev_core_init(struct platform_device *pdev,
+			 struct mtk_fd_dev *fd_dev,
+			 struct mtk_fd_ctx_desc *ctx_desc);
+
+int mtk_fd_dev_core_init_ext(struct platform_device *pdev,
+			     struct mtk_fd_dev *fd_dev,
+			     struct mtk_fd_ctx_desc *ctx_desc,
+			     struct media_device *media_dev,
+			     struct v4l2_device *v4l2_dev);
+
+int mtk_fd_dev_core_release(struct platform_device *pdev,
+			    struct mtk_fd_dev *fd_dev);
+
+#endif /* __MTK_FD_DEV_H__ */
diff --git a/drivers/media/platform/mtk-isp/fd/mtk_fd-smem-drv.c b/drivers/media/platform/mtk-isp/fd/mtk_fd-smem-drv.c
new file mode 100644
index 0000000..99a852d
--- /dev/null
+++ b/drivers/media/platform/mtk-isp/fd/mtk_fd-smem-drv.c
@@ -0,0 +1,452 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (c) 2018 MediaTek Inc.
+ * Author: Frederic Chen <frederic.chen-NuS5LvNUpcJWk0Htik3J/w@public.gmane.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/module.h>
+#include <linux/device.h>
+#include <linux/platform_device.h>
+#include <linux/pm_runtime.h>
+#include <linux/of.h>
+#include <linux/of_fdt.h>
+#include <linux/of_reserved_mem.h>
+#include <linux/dma-contiguous.h>
+#include <linux/dma-mapping.h>
+#include <linux/slab.h>
+#include <linux/err.h>
+#include <linux/iommu.h>
+#include <asm/cacheflush.h>
+
+#define MTK_FD_SMEM_DEV_NAME "MTK-FD-SMEM"
+
+struct mtk_fd_smem_drv {
+	struct platform_device *pdev;
+	struct sg_table sgt;
+	struct page **smem_pages;
+	int num_smem_pages;
+	phys_addr_t smem_base;
+	dma_addr_t smem_dma_base;
+	int smem_size;
+};
+
+static struct reserved_mem *isp_reserved_smem;
+
+static int mtk_fd_smem_setup_dma_ops(struct device *smem_dev,
+				     const struct dma_map_ops *smem_ops);
+
+static int mtk_fd_smem_get_sgtable(struct device *dev,
+				   struct sg_table *sgt,
+				   void *cpu_addr, dma_addr_t dma_addr,
+				   size_t size, unsigned long attrs);
+
+static const struct dma_map_ops smem_dma_ops = {
+	.get_sgtable = mtk_fd_smem_get_sgtable,
+};
+
+static int mtk_fd_smem_init(struct mtk_fd_smem_drv **mtk_fd_smem_drv_out,
+			    struct platform_device *pdev)
+{
+	struct mtk_fd_smem_drv *isp_sys = NULL;
+	struct device *dev = &pdev->dev;
+
+	isp_sys = devm_kzalloc(dev,
+			       sizeof(*isp_sys), GFP_KERNEL);
+
+	isp_sys->pdev = pdev;
+
+	*mtk_fd_smem_drv_out = isp_sys;
+
+	return 0;
+}
+
+static int mtk_fd_smem_drv_probe(struct platform_device *pdev)
+{
+	struct mtk_fd_smem_drv *smem_drv = NULL;
+	int r = 0;
+	struct device *dev = &pdev->dev;
+
+	dev_dbg(dev, "probe mtk_fd_smem_drv\n");
+
+	r = mtk_fd_smem_init(&smem_drv, pdev);
+
+	if (!smem_drv)
+		return -ENOMEM;
+
+	dev_set_drvdata(dev, smem_drv);
+
+	if (isp_reserved_smem) {
+		dma_addr_t dma_addr;
+		phys_addr_t addr;
+		struct iommu_domain *smem_dom;
+		int i = 0;
+		int size_align = 0;
+		struct page **pages = NULL;
+		int n_pages = 0;
+		struct sg_table *sgt = &smem_drv->sgt;
+
+		size_align = round_down(isp_reserved_smem->size,
+					PAGE_SIZE);
+		n_pages = size_align >> PAGE_SHIFT;
+
+		pages = kmalloc_array(n_pages, sizeof(struct page *),
+				      GFP_KERNEL);
+
+		if (!pages)
+			return -ENOMEM;
+
+		for (i = 0; i < n_pages; i++)
+			pages[i] = phys_to_page(isp_reserved_smem->base
+						+ i * PAGE_SIZE);
+
+		r = sg_alloc_table_from_pages(sgt, pages, n_pages, 0,
+					      size_align, GFP_KERNEL);
+
+		if (r) {
+			dev_err(dev, "failed to get alloca sg table\n");
+			return -ENOMEM;
+		}
+
+		dma_map_sg_attrs(dev, sgt->sgl, sgt->nents,
+				 DMA_BIDIRECTIONAL,
+				 DMA_ATTR_SKIP_CPU_SYNC);
+
+		dma_addr = sg_dma_address(sgt->sgl);
+		smem_dom = iommu_get_domain_for_dev(dev);
+		addr = iommu_iova_to_phys(smem_dom, dma_addr);
+
+		if (addr != isp_reserved_smem->base)
+			dev_err(dev,
+				"incorrect pa(%llx) from iommu_iova_to_phys, should be %llx\n",
+			(unsigned long long)addr,
+			(unsigned long long)isp_reserved_smem->base);
+
+		r = dma_declare_coherent_memory(dev,
+						isp_reserved_smem->base,
+			dma_addr, size_align, DMA_MEMORY_EXCLUSIVE);
+
+		dev_dbg(dev,
+			"Coherent mem base(%llx,%llx),size(%lx),ret(%d)\n",
+			isp_reserved_smem->base,
+			dma_addr, size_align, r);
+
+		smem_drv->smem_base = isp_reserved_smem->base;
+		smem_drv->smem_size = size_align;
+		smem_drv->smem_pages = pages;
+		smem_drv->num_smem_pages = n_pages;
+		smem_drv->smem_dma_base = dma_addr;
+
+		dev_dbg(dev, "smem_drv setting (%llx,%lx,%llx,%d)\n",
+			smem_drv->smem_base, smem_drv->smem_size,
+			(unsigned long long)smem_drv->smem_pages,
+			smem_drv->num_smem_pages);
+	}
+
+	r = mtk_fd_smem_setup_dma_ops(dev, &smem_dma_ops);
+
+	return r;
+}
+
+phys_addr_t mtk_fd_smem_iova_to_phys(struct device *dev,
+				     dma_addr_t iova)
+{
+		struct iommu_domain *smem_dom;
+		phys_addr_t addr;
+		phys_addr_t limit;
+		struct mtk_fd_smem_drv *smem_dev =
+			dev_get_drvdata(dev);
+
+		if (!smem_dev)
+			return 0;
+
+		smem_dom = iommu_get_domain_for_dev(dev);
+
+		if (!smem_dom)
+			return 0;
+
+		addr = iommu_iova_to_phys(smem_dom, iova);
+
+		limit = smem_dev->smem_base + smem_dev->smem_size;
+
+		if (addr < smem_dev->smem_base || addr >= limit) {
+			dev_err(dev,
+				"Unexpected paddr %pa (must >= %pa and <%pa)\n",
+				&addr, &smem_dev->smem_base, &limit);
+			return 0;
+		}
+		dev_dbg(dev, "Pa verifcation pass: %pa(>=%pa, <%pa)\n",
+			&addr, &smem_dev->smem_base, &limit);
+		return addr;
+}
+
+static int mtk_fd_smem_drv_remove(struct platform_device *pdev)
+{
+	struct mtk_fd_smem_drv *smem_drv =
+		dev_get_drvdata(&pdev->dev);
+
+	kfree(smem_drv->smem_pages);
+	return 0;
+}
+
+static int mtk_fd_smem_drv_suspend(struct device *dev)
+{
+	return 0;
+}
+
+static int mtk_fd_smem_drv_resume(struct device *dev)
+{
+	return 0;
+}
+
+static int mtk_fd_smem_drv_dummy_cb(struct device *dev)
+{
+	return 0;
+}
+
+static const struct dev_pm_ops mtk_fd_smem_drv_pm_ops = {
+	SET_RUNTIME_PM_OPS(&mtk_fd_smem_drv_dummy_cb,
+			   &mtk_fd_smem_drv_dummy_cb, NULL)
+	SET_SYSTEM_SLEEP_PM_OPS
+		(&mtk_fd_smem_drv_suspend, &mtk_fd_smem_drv_resume)
+};
+
+static const struct of_device_id mtk_fd_smem_drv_of_match[] = {
+	{
+		.compatible = "mediatek,fd_smem",
+	},
+	{},
+};
+
+MODULE_DEVICE_TABLE(of, mtk_fd_smem_drv_of_match);
+
+static struct platform_driver mtk_fd_smem_driver = {
+	.probe = mtk_fd_smem_drv_probe,
+	.remove = mtk_fd_smem_drv_remove,
+	.driver = {
+		.name = MTK_FD_SMEM_DEV_NAME,
+		.of_match_table =
+			of_match_ptr(mtk_fd_smem_drv_of_match),
+		.pm = &mtk_fd_smem_drv_pm_ops,
+	},
+};
+
+static int __init mtk_fd_smem_dma_setup(struct reserved_mem
+					*rmem)
+{
+	unsigned long node = rmem->fdt_node;
+
+	if (of_get_flat_dt_prop(node, "reusable", NULL))
+		return -EINVAL;
+
+	if (!of_get_flat_dt_prop(node, "no-map", NULL)) {
+		pr_err("Reserved memory: regions without no-map are not yet supported\n");
+		return -EINVAL;
+	}
+
+	isp_reserved_smem = rmem;
+
+	pr_debug("Reserved memory: created DMA memory pool at %pa, size %ld MiB\n",
+		 &rmem->base, (unsigned long)rmem->size / SZ_1M);
+	return 0;
+}
+
+RESERVEDMEM_OF_DECLARE(mtk_fd_smem,
+		       "mediatek,reserve-memory-fd_smem",
+		       mtk_fd_smem_dma_setup);
+
+int __init mtk_fd_smem_drv_init(void)
+{
+	int ret = 0;
+
+	pr_debug("platform_driver_register: mtk_fd_smem_driver\n");
+	ret = platform_driver_register(&mtk_fd_smem_driver);
+
+	if (ret)
+		pr_warn("fd smem drv init failed, driver didn't probe\n");
+
+	return ret;
+}
+subsys_initcall(mtk_fd_smem_drv_init);
+
+void __exit mtk_fd_smem_drv_ext(void)
+{
+	platform_driver_unregister(&mtk_fd_smem_driver);
+}
+module_exit(mtk_fd_smem_drv_ext);
+
+/********************************************
+ * MTK FD SMEM DMA ops *
+ ********************************************/
+
+struct dma_coherent_mem {
+	void		*virt_base;
+	dma_addr_t	device_base;
+	unsigned long	pfn_base;
+	int		size;
+	int		flags;
+	unsigned long	*bitmap;
+	spinlock_t	spinlock; /* protect the members in dma_coherent_mem */
+	bool		use_dev_dma_pfn_offset;
+};
+
+static struct dma_coherent_mem *dev_get_coherent_memory(struct device *dev)
+{
+	if (dev && dev->dma_mem)
+		return dev->dma_mem;
+	return NULL;
+}
+
+static int mtk_fd_smem_get_sgtable(struct device *dev,
+				   struct sg_table *sgt,
+	void *cpu_addr, dma_addr_t dma_addr,
+	size_t size, unsigned long attrs)
+{
+	struct mtk_fd_smem_drv *smem_dev = dev_get_drvdata(dev);
+	int n_pages_align = 0;
+	int size_align = 0;
+	int page_start = 0;
+	unsigned long long offset_p = 0;
+	unsigned long long offset_d = 0;
+
+	phys_addr_t paddr = mtk_fd_smem_iova_to_phys(dev, dma_addr);
+
+	offset_d = (unsigned long long)dma_addr -
+		(unsigned long long)smem_dev->smem_dma_base;
+
+	offset_p = (unsigned long long)paddr -
+		(unsigned long long)smem_dev->smem_base;
+
+	dev_dbg(dev, "%s:dma_addr:%llx,cpu_addr:%llx,pa:%llx,size:%d\n",
+		__func__,
+		(unsigned long long)dma_addr,
+		(unsigned long long)cpu_addr,
+		(unsigned long long)paddr,
+		size
+		);
+
+	dev_dbg(dev, "%s:offset p:%llx,offset d:%llx\n",
+		__func__,
+		(unsigned long long)offset_p,
+		(unsigned long long)offset_d
+		);
+
+	size_align = round_up(size, PAGE_SIZE);
+	n_pages_align = size_align >> PAGE_SHIFT;
+	page_start = offset_p >> PAGE_SHIFT;
+
+	dev_dbg(dev,
+		"%s:page idx:%d,page pa:%llx,pa:%llx, aligned size:%d\n",
+		__func__,
+		page_start,
+		(unsigned long long)page_to_phys(*(smem_dev->smem_pages
+			+ page_start)),
+		(unsigned long long)paddr,
+		size_align
+		);
+
+	if (!smem_dev) {
+		dev_err(dev, "can't get sgtable from smem_dev\n");
+		return -EINVAL;
+	}
+
+	dev_dbg(dev, "get sgt of the smem: %d pages\n", n_pages_align);
+
+	return sg_alloc_table_from_pages(sgt,
+		smem_dev->smem_pages + page_start,
+		n_pages_align,
+		0, size_align, GFP_KERNEL);
+}
+
+static void *mtk_fd_smem_get_cpu_addr(struct mtk_fd_smem_drv *smem_dev,
+				      struct scatterlist *sg)
+{
+	struct device *dev = &smem_dev->pdev->dev;
+	struct dma_coherent_mem *dma_mem =
+		dev_get_coherent_memory(dev);
+
+	phys_addr_t addr = (phys_addr_t)sg_phys(sg);
+
+	if (addr < smem_dev->smem_base ||
+	    addr > smem_dev->smem_base + smem_dev->smem_size) {
+		dev_err(dev, "Invalid paddr 0x%llx from sg\n", addr);
+		return NULL;
+	}
+
+	return dma_mem->virt_base + (addr - smem_dev->smem_base);
+}
+
+static void mtk_fd_smem_sync_sg_for_cpu(struct device *dev,
+					struct scatterlist *sgl, int nelems,
+					enum dma_data_direction dir)
+{
+	struct mtk_fd_smem_drv *smem_dev =
+		dev_get_drvdata(dev);
+	void *cpu_addr;
+
+	cpu_addr = mtk_fd_smem_get_cpu_addr(smem_dev, sgl);
+
+	dev_dbg(dev,
+		"__dma_unmap_area:paddr(0x%llx),vaddr(0x%llx),size(%d)\n",
+		(unsigned long long)sg_phys(sgl),
+		(unsigned long long)cpu_addr,
+		sgl->length);
+
+	__dma_unmap_area(cpu_addr, sgl->length, dir);
+}
+
+static void mtk_fd_smem_sync_sg_for_device(struct device *dev,
+					   struct scatterlist *sgl, int nelems,
+					   enum dma_data_direction dir)
+{
+	struct mtk_fd_smem_drv *smem_dev =
+			dev_get_drvdata(dev);
+	void *cpu_addr;
+
+	cpu_addr = mtk_fd_smem_get_cpu_addr(smem_dev, sgl);
+
+	dev_dbg(dev,
+		"__dma_map_area:paddr(0x%llx),vaddr(0x%llx),size(%d)\n",
+		(unsigned long long)sg_phys(sgl),
+		(unsigned long long)cpu_addr,
+		sgl->length);
+
+	__dma_map_area(cpu_addr, sgl->length, dir);
+}
+
+static int mtk_fd_smem_setup_dma_ops(struct device *dev,
+				     const struct dma_map_ops *smem_ops)
+{
+	if (!dev->dma_ops)
+		return -EINVAL;
+
+	memcpy((void *)smem_ops, dev->dma_ops, sizeof(*smem_ops));
+
+	((struct dma_map_ops *)smem_ops)->get_sgtable =
+		mtk_fd_smem_get_sgtable;
+	((struct dma_map_ops *)smem_ops)->sync_sg_for_device =
+		mtk_fd_smem_sync_sg_for_device;
+	((struct dma_map_ops *)smem_ops)->sync_sg_for_cpu =
+		mtk_fd_smem_sync_sg_for_cpu;
+
+	dev->dma_ops = smem_ops;
+
+	return 0;
+}
+
+void mtk_fd_smem_enable_mpu(struct device *dev)
+{
+	dev_warn(dev, "MPU enabling func is not ready now\n");
+}
+
+MODULE_AUTHOR("Frederic Chen <frederic.chen-NuS5LvNUpcJWk0Htik3J/w@public.gmane.org>");
+MODULE_LICENSE("GPL v2");
+MODULE_DESCRIPTION("Mediatek FD shared memory driver");
diff --git a/drivers/media/platform/mtk-isp/fd/mtk_fd-smem.h b/drivers/media/platform/mtk-isp/fd/mtk_fd-smem.h
new file mode 100644
index 0000000..a19fc37
--- /dev/null
+++ b/drivers/media/platform/mtk-isp/fd/mtk_fd-smem.h
@@ -0,0 +1,25 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (c) 2018 MediaTek Inc.
+ * Author: Frederic Chen <frederic.chen-NuS5LvNUpcJWk0Htik3J/w@public.gmane.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#ifndef __MTK_FD_SMEM_H__
+#define __MTK_FD_SMEM_H__
+
+#include <linux/dma-mapping.h>
+
+phys_addr_t mtk_fd_smem_iova_to_phys(struct device *smem_dev,
+				     dma_addr_t iova);
+void mtk_fd_smem_enable_mpu(struct device *smem_dev);
+
+#endif /*__MTK_FD_SMEM_H__*/
diff --git a/drivers/media/platform/mtk-isp/fd/mtk_fd-v4l2-util.c b/drivers/media/platform/mtk-isp/fd/mtk_fd-v4l2-util.c
new file mode 100644
index 0000000..ab85aea
--- /dev/null
+++ b/drivers/media/platform/mtk-isp/fd/mtk_fd-v4l2-util.c
@@ -0,0 +1,1046 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (c) 2018 Mediatek Corporation.
+ * Copyright (c) 2017 Intel Corporation.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License version
+ * 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * MTK_FD-v4l2 is highly based on Intel IPU 3 chrome driver
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/pm_runtime.h>
+#include <linux/videodev2.h>
+#include <media/v4l2-ioctl.h>
+#include <media/videobuf2-dma-contig.h>
+#include <media/v4l2-subdev.h>
+#include <media/v4l2-event.h>
+#include <linux/device.h>
+#include <linux/platform_device.h>
+
+#include "mtk_fd-dev.h"
+
+static u32 mtk_fd_node_get_v4l2_cap
+	(struct mtk_fd_ctx_queue *node_ctx);
+
+static int mtk_fd_videoc_s_meta_fmt(struct file *file, void *fh,
+				    struct v4l2_format *f);
+
+static int mtk_fd_subdev_open(struct v4l2_subdev *sd,
+			      struct v4l2_subdev_fh *fh)
+{
+	struct mtk_fd_dev *fd_dev = mtk_fd_subdev_to_dev(sd);
+
+	fd_dev->ctx.fh = fh;
+
+	return mtk_fd_ctx_open(&fd_dev->ctx);
+}
+
+static int mtk_fd_subdev_close(struct v4l2_subdev *sd,
+			       struct v4l2_subdev_fh *fh)
+{
+	struct mtk_fd_dev *fd_dev = mtk_fd_subdev_to_dev(sd);
+
+	return mtk_fd_ctx_release(&fd_dev->ctx);
+}
+
+static int mtk_fd_subdev_s_stream(struct v4l2_subdev *sd, int enable)
+{
+	int ret = 0;
+
+	struct mtk_fd_dev *fd_dev = mtk_fd_subdev_to_dev(sd);
+
+	if (enable) {
+		ret = mtk_fd_ctx_streamon(&fd_dev->ctx);
+
+		if (!ret)
+			ret = mtk_fd_dev_queue_buffers
+				(mtk_fd_ctx_to_dev(&fd_dev->ctx), true);
+		if (ret)
+			pr_err("failed to queue initial buffers (%d)", ret);
+	}	else {
+		ret = mtk_fd_ctx_streamoff(&fd_dev->ctx);
+	}
+
+	if (!ret)
+		fd_dev->mem2mem2.streaming = enable;
+
+	return ret;
+}
+
+static int mtk_fd_link_setup(struct media_entity *entity,
+			     const struct media_pad *local,
+			     const struct media_pad *remote, u32 flags)
+{
+	struct mtk_fd_mem2mem2_device *m2m2 =
+		container_of(entity, struct mtk_fd_mem2mem2_device,
+			     subdev.entity);
+	struct mtk_fd_dev *fd_dev =
+		container_of(m2m2, struct mtk_fd_dev, mem2mem2);
+
+	u32 pad = local->index;
+
+	pr_info("link setup: %d --> %d\n", pad, remote->index);
+
+#if KERNEL_VERSION(4, 5, 0) >= MTK_FD_KERNEL_BASE_VERSION
+	WARN_ON(entity->type != MEDIA_ENT_T_V4L2_SUBDEV);
+#else
+	WARN_ON(entity->obj_type != MEDIA_ENTITY_TYPE_V4L2_SUBDEV);
+#endif
+
+	WARN_ON(pad >= m2m2->num_nodes);
+
+	m2m2->nodes[pad].enabled = !!(flags & MEDIA_LNK_FL_ENABLED);
+
+	/**
+	 * queue_enable can be phase out in the future since
+	 * we don't have internal queue of each node in
+	 * v4l2 common module
+	 */
+	fd_dev->queue_enabled[pad] = m2m2->nodes[pad].enabled;
+
+	return 0;
+}
+
+static void mtk_fd_vb2_buf_queue(struct vb2_buffer *vb)
+{
+	struct mtk_fd_mem2mem2_device *m2m2 = vb2_get_drv_priv(vb->vb2_queue);
+	struct mtk_fd_dev *mtk_fd_dev = mtk_fd_m2m_to_dev(m2m2);
+	struct device *dev = &mtk_fd_dev->pdev->dev;
+	struct mtk_fd_dev_buffer *buf = NULL;
+	struct vb2_v4l2_buffer *v4l2_buf = NULL;
+	struct mtk_fd_dev_video_device *node =
+		mtk_fd_vbq_to_isp_node(vb->vb2_queue);
+	int queue = mtk_fd_dev_get_queue_id_of_dev_node(mtk_fd_dev, node);
+
+	dev_dbg(dev,
+		"queue vb2_buf: Node(%s) queue id(%d)\n",
+		node->name,
+		queue);
+
+	if (queue < 0) {
+		dev_err(m2m2->dev, "Invalid mtk_fd_dev node.\n");
+		return;
+	}
+
+	if (mtk_fd_dev->ctx.mode == MTK_FD_CTX_MODE_DEBUG_BYPASS_ALL) {
+		dev_dbg(m2m2->dev, "By pass mode, just loop back the buffer\n");
+		vb2_buffer_done(vb, VB2_BUF_STATE_DONE);
+		return;
+	}
+
+	if (!vb)
+		pr_err("VB can't be null\n");
+
+	buf = mtk_fd_vb2_buf_to_dev_buf(vb);
+
+	if (!buf)
+		pr_err("buf can't be null\n");
+
+	v4l2_buf = to_vb2_v4l2_buffer(vb);
+
+	if (!v4l2_buf)
+		pr_err("v4l2_buf can't be null\n");
+
+	mutex_lock(&mtk_fd_dev->lock);
+
+	pr_err("init  mtk_fd_ctx_buf_init, sequence(%d)\n", v4l2_buf->sequence);
+
+	/* the dma address will be filled in later frame buffer handling*/
+	mtk_fd_ctx_buf_init(&buf->ctx_buf, queue, (dma_addr_t)0);
+	pr_info("set mtk_fd_ctx_buf_init: user seq=%d\n",
+		buf->ctx_buf.user_sequence);
+
+	/* Added the buffer into the tracking list */
+	list_add_tail(&buf->m2m2_buf.list,
+		      &m2m2->nodes[node - m2m2->nodes].buffers);
+	mutex_unlock(&mtk_fd_dev->lock);
+
+	/* Enqueue the buffer */
+	if (mtk_fd_dev->mem2mem2.streaming) {
+		pr_info("%s: mtk_fd_dev_queue_buffers\n", node->name);
+		mtk_fd_dev_queue_buffers(mtk_fd_dev, false);
+	}
+}
+
+#if KERNEL_VERSION(4, 5, 0) >= MTK_FD_KERNEL_BASE_VERSION
+static int mtk_fd_vb2_queue_setup(struct vb2_queue *vq,
+				  const void *parg,
+				  unsigned int *num_buffers,
+				  unsigned int *num_planes,
+				  unsigned int sizes[], void *alloc_ctxs[])
+#else
+static int mtk_fd_vb2_queue_setup(struct vb2_queue *vq,
+				  unsigned int *num_buffers,
+				  unsigned int *num_planes,
+				  unsigned int sizes[],
+				  struct device *alloc_devs[])
+#endif
+{
+	struct mtk_fd_mem2mem2_device *m2m2 = vb2_get_drv_priv(vq);
+	struct mtk_fd_dev_video_device *node = mtk_fd_vbq_to_isp_node(vq);
+	struct mtk_fd_dev *fd_dev = mtk_fd_m2m_to_dev(m2m2);
+	void *buf_alloc_ctx = NULL;
+	int queue = mtk_fd_dev_get_queue_id_of_dev_node(fd_dev, node);
+	/* Get V4L2 format with the following method */
+	const struct v4l2_format *fmt = &node->vdev_fmt;
+
+	*num_planes = 1;
+	*num_buffers = clamp_val(*num_buffers, 1, VB2_MAX_FRAME);
+
+	vq->dma_attrs |= DMA_ATTR_NON_CONSISTENT;
+	pr_info("queue(%d): cached mmap enabled\n", queue);
+
+	if (vq->type == V4L2_BUF_TYPE_META_CAPTURE ||
+	    vq->type == V4L2_BUF_TYPE_META_OUTPUT) {
+		sizes[0] = fmt->fmt.meta.buffersize;
+		buf_alloc_ctx = fd_dev->ctx.smem_vb2_alloc_ctx;
+		pr_info("Select smem_vb2_alloc_ctx(%llx)\n",
+			(unsigned long long)buf_alloc_ctx);
+	} else {
+		sizes[0] = fmt->fmt.pix_mp.plane_fmt[0].sizeimage;
+		buf_alloc_ctx = fd_dev->ctx.img_vb2_alloc_ctx;
+		pr_info("Select img_vb2_alloc_ctx(%llx)\n",
+			(unsigned long long)buf_alloc_ctx);
+	}
+
+#if KERNEL_VERSION(4, 5, 0) >= MTK_FD_KERNEL_BASE_VERSION
+	alloc_ctxs[0] = buf_alloc_ctx;
+#else
+	alloc_devs[0] = (struct device *)buf_alloc_ctx;
+#endif
+
+	pr_info("mtk_fd_vb2_queue_setup:type(%d),size(%d),ctx(%llx)\n",
+		vq->type, sizes[0], (unsigned long long)buf_alloc_ctx);
+
+	/* Initialize buffer queue */
+	INIT_LIST_HEAD(&node->buffers);
+
+	return 0;
+}
+
+static bool mtk_fd_all_nodes_streaming(struct mtk_fd_mem2mem2_device *m2m2,
+				       struct mtk_fd_dev_video_device *except)
+{
+	int i;
+
+	for (i = 0; i < m2m2->num_nodes; i++) {
+		struct mtk_fd_dev_video_device *node = &m2m2->nodes[i];
+
+		if (node == except)
+			continue;
+		if (node->enabled && !vb2_start_streaming_called(&node->vbq))
+			return false;
+	}
+
+	return true;
+}
+
+static void mtk_fd_return_all_buffers(struct mtk_fd_mem2mem2_device *m2m2,
+				      struct mtk_fd_dev_video_device *node,
+				      enum vb2_buffer_state state)
+{
+	struct mtk_fd_dev *mtk_fd_dev = mtk_fd_m2m_to_dev(m2m2);
+	struct mtk_fd_mem2mem2_buffer *b, *b0;
+
+	/* Return all buffers */
+	mutex_lock(&mtk_fd_dev->lock);
+	list_for_each_entry_safe(b, b0, &node->buffers, list) {
+		list_del(&b->list);
+		vb2_buffer_done(&b->vbb.vb2_buf, state);
+	}
+	mutex_unlock(&mtk_fd_dev->lock);
+}
+
+static int mtk_fd_vb2_start_streaming(struct vb2_queue *vq, unsigned int count)
+{
+	struct mtk_fd_mem2mem2_device *m2m2 = vb2_get_drv_priv(vq);
+	struct mtk_fd_dev_video_device *node =
+		mtk_fd_vbq_to_isp_node(vq);
+	int r;
+
+	if (m2m2->streaming) {
+		r = -EBUSY;
+		goto fail_return_bufs;
+	}
+
+	if (!node->enabled) {
+		pr_err("Node (%ld) is not enable\n", node - m2m2->nodes);
+		r = -EINVAL;
+		goto fail_return_bufs;
+	}
+#if KERNEL_VERSION(4, 5, 0) >= MTK_FD_KERNEL_BASE_VERSION
+	r = media_entity_pipeline_start(&node->vdev.entity, &m2m2->pipeline);
+#else
+	r = media_pipeline_start(&node->vdev.entity, &m2m2->pipeline);
+#endif
+	if (r < 0) {
+		pr_err("Node (%ld) media_pipeline_start failed\n",
+		       node - m2m2->nodes);
+		goto fail_return_bufs;
+	}
+
+	if (!mtk_fd_all_nodes_streaming(m2m2, node))
+		return 0;
+
+	/* Start streaming of the whole pipeline now */
+
+	r = v4l2_subdev_call(&m2m2->subdev, video, s_stream, 1);
+	if (r < 0) {
+		pr_err("Node (%ld) v4l2_subdev_call s_stream failed\n",
+		       node - m2m2->nodes);
+		goto fail_stop_pipeline;
+	}
+	return 0;
+
+fail_stop_pipeline:
+#if KERNEL_VERSION(4, 5, 0) >= MTK_FD_KERNEL_BASE_VERSION
+	media_entity_pipeline_stop(&node->vdev.entity);
+#else
+	media_pipeline_stop(&node->vdev.entity);
+#endif
+fail_return_bufs:
+	mtk_fd_return_all_buffers(m2m2, node, VB2_BUF_STATE_QUEUED);
+
+	return r;
+}
+
+static void mtk_fd_vb2_stop_streaming(struct vb2_queue *vq)
+{
+	struct mtk_fd_mem2mem2_device *m2m2 = vb2_get_drv_priv(vq);
+	struct mtk_fd_dev_video_device *node =
+		mtk_fd_vbq_to_isp_node(vq);
+	int r;
+
+	WARN_ON(!node->enabled);
+
+	/* Was this the first node with streaming disabled? */
+	if (mtk_fd_all_nodes_streaming(m2m2, node)) {
+		/* Yes, really stop streaming now */
+		r = v4l2_subdev_call(&m2m2->subdev, video, s_stream, 0);
+		if (r)
+			dev_err(m2m2->dev, "failed to stop streaming\n");
+	}
+
+	mtk_fd_return_all_buffers(m2m2, node, VB2_BUF_STATE_ERROR);
+#if KERNEL_VERSION(4, 5, 0) >= MTK_FD_KERNEL_BASE_VERSION
+	media_entity_pipeline_stop(&node->vdev.entity);
+#else
+	media_pipeline_stop(&node->vdev.entity);
+#endif
+}
+
+static int mtk_fd_videoc_querycap(struct file *file, void *fh,
+				  struct v4l2_capability *cap)
+{
+	struct mtk_fd_mem2mem2_device *m2m2 = video_drvdata(file);
+	struct mtk_fd_dev_video_device *node = file_to_mtk_fd_node(file);
+	struct mtk_fd_dev *fd_dev = mtk_fd_m2m_to_dev(m2m2);
+	int queue_id =
+		mtk_fd_dev_get_queue_id_of_dev_node(fd_dev, node);
+	struct mtk_fd_ctx_queue *node_ctx = &fd_dev->ctx.queue[queue_id];
+
+	strlcpy(cap->driver, m2m2->name, sizeof(cap->driver));
+	strlcpy(cap->card, m2m2->model, sizeof(cap->card));
+	snprintf(cap->bus_info, sizeof(cap->bus_info),
+		 "platform:%s", node->name);
+
+	cap->device_caps =
+		mtk_fd_node_get_v4l2_cap(node_ctx) | V4L2_CAP_STREAMING;
+	cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
+
+	return 0;
+}
+
+/* Propagate forward always the format from the CIO2 subdev */
+static int mtk_fd_videoc_g_fmt(struct file *file, void *fh,
+			       struct v4l2_format *f)
+{
+	struct mtk_fd_dev_video_device *node = file_to_mtk_fd_node(file);
+
+	f->fmt = node->vdev_fmt.fmt;
+
+	return 0;
+}
+
+static int mtk_fd_videoc_try_fmt(struct file *file, void *fh,
+				 struct v4l2_format *f)
+{
+	struct mtk_fd_mem2mem2_device *m2m2 = video_drvdata(file);
+	struct mtk_fd_dev *fd_dev = mtk_fd_m2m_to_dev(m2m2);
+	struct mtk_fd_ctx *dev_ctx = &fd_dev->ctx;
+	struct mtk_fd_dev_video_device *node = file_to_mtk_fd_node(file);
+	int queue_id =
+		mtk_fd_dev_get_queue_id_of_dev_node(fd_dev, node);
+	int ret = 0;
+
+	ret = mtk_fd_ctx_fmt_set_img(dev_ctx, queue_id, &f->fmt.pix_mp,
+				     &node->vdev_fmt.fmt.pix_mp);
+
+	/* Simply set the format to the node context in the initial version */
+	if (ret) {
+		pr_warn("Fmt(%d) not support for queue(%d), load default fmt\n",
+			f->fmt.pix_mp.pixelformat, queue_id);
+
+		ret = mtk_fd_ctx_format_load_default_fmt
+			(&dev_ctx->queue[queue_id], f);
+	}
+
+	if (!ret) {
+		node->vdev_fmt.fmt.pix_mp = f->fmt.pix_mp;
+		dev_ctx->queue[queue_id].fmt.pix_mp = node->vdev_fmt.fmt.pix_mp;
+	}
+
+	return ret;
+}
+
+static int mtk_fd_videoc_s_fmt(struct file *file, void *fh,
+			       struct v4l2_format *f)
+{
+	struct mtk_fd_mem2mem2_device *m2m2 = video_drvdata(file);
+	struct mtk_fd_dev *fd_dev = mtk_fd_m2m_to_dev(m2m2);
+	struct mtk_fd_ctx *dev_ctx = &fd_dev->ctx;
+	struct mtk_fd_dev_video_device *node = file_to_mtk_fd_node(file);
+	int queue_id = mtk_fd_dev_get_queue_id_of_dev_node(fd_dev, node);
+	int ret = 0;
+
+	ret = mtk_fd_ctx_fmt_set_img(dev_ctx, queue_id, &f->fmt.pix_mp,
+				     &node->vdev_fmt.fmt.pix_mp);
+
+	/* Simply set the format to the node context in the initial version */
+	if (!ret)
+		dev_ctx->queue[queue_id].fmt.pix_mp = node->vdev_fmt.fmt.pix_mp;
+	else
+		dev_warn(&fd_dev->pdev->dev, "s_fmt, format not support\n");
+
+	return ret;
+}
+
+static int mtk_fd_meta_enum_format(struct file *file, void *fh,
+				   struct v4l2_fmtdesc *f)
+{
+	struct mtk_fd_dev_video_device *node = file_to_mtk_fd_node(file);
+
+	if (f->index > 0 || f->type != node->vbq.type)
+		return -EINVAL;
+
+	f->pixelformat = node->vdev_fmt.fmt.meta.dataformat;
+
+	return 0;
+}
+
+static int mtk_fd_videoc_s_meta_fmt(struct file *file, void *fh,
+				    struct v4l2_format *f)
+{
+	struct mtk_fd_mem2mem2_device *m2m2 = video_drvdata(file);
+	struct mtk_fd_dev *fd_dev = mtk_fd_m2m_to_dev(m2m2);
+	struct mtk_fd_ctx *dev_ctx = &fd_dev->ctx;
+	struct mtk_fd_dev_video_device *node = file_to_mtk_fd_node(file);
+	int queue_id = mtk_fd_dev_get_queue_id_of_dev_node(fd_dev, node);
+
+	int ret = 0;
+
+	if (f->type != node->vbq.type)
+		return -EINVAL;
+
+	ret = mtk_fd_ctx_format_load_default_fmt(&dev_ctx->queue[queue_id], f);
+
+	if (!ret) {
+		node->vdev_fmt.fmt.meta = f->fmt.meta;
+		dev_ctx->queue[queue_id].fmt.meta = node->vdev_fmt.fmt.meta;
+	} else {
+		dev_warn(&fd_dev->pdev->dev,
+			 "s_meta_fm failed, format not support\n");
+	}
+
+	return ret;
+}
+
+static int mtk_fd_videoc_g_meta_fmt(struct file *file, void *fh,
+				    struct v4l2_format *f)
+{
+	struct mtk_fd_dev_video_device *node = file_to_mtk_fd_node(file);
+
+	if (f->type != node->vbq.type)
+		return -EINVAL;
+
+	f->fmt = node->vdev_fmt.fmt;
+
+	return 0;
+}
+
+int mtk_fd_videoc_qbuf(struct file *file, void *priv, struct v4l2_buffer *p)
+{
+	struct video_device *vdev = video_devdata(file);
+	struct vb2_buffer *vb;
+	struct mtk_fd_dev_buffer *db;
+	int r = 0;
+
+	/* check if vb2 queue is busy */
+	if (vdev->queue->owner && vdev->queue->owner != file->private_data)
+		return -EBUSY;
+
+	/**
+	 * Keep the value of sequence in v4l2_buffer
+	 * in ctx buf since vb2_qbuf will set it to 0
+	 */
+	vb = vdev->queue->bufs[p->index];
+
+	if (vb) {
+		db = mtk_fd_vb2_buf_to_dev_buf(vb);
+		pr_info("qbuf: p:%llx,vb:%llx, db:%llx\n",
+			(unsigned long long)p,
+			(unsigned long long)vb,
+			(unsigned long long)db);
+		db->ctx_buf.user_sequence = p->sequence;
+	}
+	r = vb2_qbuf(vdev->queue, vdev->v4l2_dev->mdev, p);
+	if (r)
+		pr_err("vb2_qbuf failed(err=%d): buf idx(%d)\n", r, p->index);
+	return r;
+}
+EXPORT_SYMBOL_GPL(mtk_fd_videoc_qbuf);
+
+/******************** function pointers ********************/
+
+/* subdev internal operations */
+static const struct v4l2_subdev_internal_ops mtk_fd_subdev_internal_ops = {
+	.open = mtk_fd_subdev_open,
+	.close = mtk_fd_subdev_close,
+};
+
+static const struct v4l2_subdev_core_ops mtk_fd_subdev_core_ops = {
+#if KERNEL_VERSION(4, 5, 0) >= MTK_FD_KERNEL_BASE_VERSION
+	.g_ext_ctrls = v4l2_subdev_g_ext_ctrls,
+	.try_ext_ctrls = v4l2_subdev_try_ext_ctrls,
+	.s_ext_ctrls = v4l2_subdev_s_ext_ctrls,
+	.g_ctrl = v4l2_subdev_g_ctrl,
+	.s_ctrl = v4l2_subdev_s_ctrl,
+	.queryctrl = v4l2_subdev_queryctrl,
+	.querymenu = v4l2_subdev_querymenu,
+#endif
+};
+
+static const struct v4l2_subdev_video_ops mtk_fd_subdev_video_ops = {
+	.s_stream = mtk_fd_subdev_s_stream,
+};
+
+static const struct v4l2_subdev_ops mtk_fd_subdev_ops = {
+	.core = &mtk_fd_subdev_core_ops,
+	.video = &mtk_fd_subdev_video_ops,
+};
+
+static const struct media_entity_operations mtk_fd_media_ops = {
+	.link_setup = mtk_fd_link_setup,
+	.link_validate = v4l2_subdev_link_validate,
+};
+
+static const struct vb2_ops mtk_fd_vb2_ops = {
+	.buf_queue = mtk_fd_vb2_buf_queue,
+	.queue_setup = mtk_fd_vb2_queue_setup,
+	.start_streaming = mtk_fd_vb2_start_streaming,
+	.stop_streaming = mtk_fd_vb2_stop_streaming,
+	.wait_prepare = vb2_ops_wait_prepare,
+	.wait_finish = vb2_ops_wait_finish,
+};
+
+static const struct v4l2_file_operations mtk_fd_v4l2_fops = {
+	.unlocked_ioctl = video_ioctl2,
+	.open = v4l2_fh_open,
+	.release = vb2_fop_release,
+	.poll = vb2_fop_poll,
+	.mmap = vb2_fop_mmap,
+#ifdef CONFIG_COMPAT
+	.compat_ioctl32 = v4l2_compat_ioctl32,
+#endif
+};
+
+static const struct v4l2_ioctl_ops mtk_fd_v4l2_ioctl_ops = {
+	.vidioc_querycap = mtk_fd_videoc_querycap,
+
+	.vidioc_g_fmt_vid_cap_mplane = mtk_fd_videoc_g_fmt,
+	.vidioc_s_fmt_vid_cap_mplane = mtk_fd_videoc_s_fmt,
+	.vidioc_try_fmt_vid_cap_mplane = mtk_fd_videoc_try_fmt,
+
+	.vidioc_g_fmt_vid_out_mplane = mtk_fd_videoc_g_fmt,
+	.vidioc_s_fmt_vid_out_mplane = mtk_fd_videoc_s_fmt,
+	.vidioc_try_fmt_vid_out_mplane = mtk_fd_videoc_try_fmt,
+
+	/* buffer queue management */
+	.vidioc_reqbufs = vb2_ioctl_reqbufs,
+	.vidioc_create_bufs = vb2_ioctl_create_bufs,
+	.vidioc_prepare_buf = vb2_ioctl_prepare_buf,
+	.vidioc_querybuf = vb2_ioctl_querybuf,
+	.vidioc_qbuf = mtk_fd_videoc_qbuf,
+	.vidioc_dqbuf = vb2_ioctl_dqbuf,
+	.vidioc_streamon = vb2_ioctl_streamon,
+	.vidioc_streamoff = vb2_ioctl_streamoff,
+	.vidioc_expbuf = vb2_ioctl_expbuf,
+};
+
+static const struct v4l2_ioctl_ops mtk_fd_v4l2_meta_ioctl_ops = {
+	.vidioc_querycap = mtk_fd_videoc_querycap,
+
+	.vidioc_enum_fmt_meta_cap = mtk_fd_meta_enum_format,
+	.vidioc_g_fmt_meta_cap = mtk_fd_videoc_g_meta_fmt,
+	.vidioc_s_fmt_meta_cap = mtk_fd_videoc_s_meta_fmt,
+	.vidioc_try_fmt_meta_cap = mtk_fd_videoc_g_meta_fmt,
+
+	.vidioc_enum_fmt_meta_out = mtk_fd_meta_enum_format,
+	.vidioc_g_fmt_meta_out = mtk_fd_videoc_g_meta_fmt,
+	.vidioc_s_fmt_meta_out = mtk_fd_videoc_s_meta_fmt,
+	.vidioc_try_fmt_meta_out = mtk_fd_videoc_g_meta_fmt,
+
+	.vidioc_reqbufs = vb2_ioctl_reqbufs,
+	.vidioc_create_bufs = vb2_ioctl_create_bufs,
+	.vidioc_prepare_buf = vb2_ioctl_prepare_buf,
+	.vidioc_querybuf = vb2_ioctl_querybuf,
+	.vidioc_qbuf = mtk_fd_videoc_qbuf,
+	.vidioc_dqbuf = vb2_ioctl_dqbuf,
+	.vidioc_streamon = vb2_ioctl_streamon,
+	.vidioc_streamoff = vb2_ioctl_streamoff,
+	.vidioc_expbuf = vb2_ioctl_expbuf,
+};
+
+static u32 mtk_fd_node_get_v4l2_cap(struct mtk_fd_ctx_queue *node_ctx)
+{
+	u32 cap = 0;
+
+	if (node_ctx->desc.capture)
+		if (node_ctx->desc.image)
+			cap = V4L2_CAP_VIDEO_CAPTURE_MPLANE;
+		else
+			cap = V4L2_CAP_META_CAPTURE;
+	else
+		if (node_ctx->desc.image)
+			cap = V4L2_CAP_VIDEO_OUTPUT_MPLANE;
+		else
+			cap = V4L2_CAP_META_OUTPUT;
+
+	return cap;
+}
+
+static u32 mtk_fd_node_get_format_type(struct mtk_fd_ctx_queue *node_ctx)
+{
+	u32 type;
+
+	if (node_ctx->desc.capture)
+		if (node_ctx->desc.image)
+			type = V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE;
+		else
+			type = V4L2_BUF_TYPE_META_CAPTURE;
+	else
+		if (node_ctx->desc.image)
+			type = V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE;
+		else
+			type = V4L2_BUF_TYPE_META_OUTPUT;
+
+	return type;
+}
+
+static const struct v4l2_ioctl_ops *mtk_fd_node_get_ioctl_ops
+	(struct mtk_fd_ctx_queue *node_ctx)
+{
+	const struct v4l2_ioctl_ops *ops = NULL;
+
+	if (node_ctx->desc.image)
+		ops = &mtk_fd_v4l2_ioctl_ops;
+	else
+		ops = &mtk_fd_v4l2_meta_ioctl_ops;
+	return ops;
+}
+
+/**
+ * Config node's video properties
+ * according to the device context requirement
+ */
+static void mtk_fd_node_to_v4l2(struct mtk_fd_dev *fd_dev, u32 node,
+				struct video_device *vdev,
+				struct v4l2_format *f)
+{
+	u32 cap;
+	struct mtk_fd_ctx *device_ctx = &fd_dev->ctx;
+	struct mtk_fd_ctx_queue *node_ctx = &device_ctx->queue[node];
+
+	WARN_ON(node >= mtk_fd_dev_get_total_node(fd_dev));
+	WARN_ON(!node_ctx);
+
+	/* set cap of the node */
+	cap = mtk_fd_node_get_v4l2_cap(node_ctx);
+	f->type = mtk_fd_node_get_format_type(node_ctx);
+	vdev->ioctl_ops = mtk_fd_node_get_ioctl_ops(node_ctx);
+
+	if (mtk_fd_ctx_format_load_default_fmt(&device_ctx->queue[node], f)) {
+		dev_err(&fd_dev->pdev->dev,
+			"Can't load default for node (%d): (%s)",
+			node, device_ctx->queue[node].desc.name);
+	} else {
+		if (device_ctx->queue[node].desc.image) {
+			dev_dbg(&fd_dev->pdev->dev,
+				"Node (%d): (%s), dfmt (f:0x%x w:%d: h:%d s:%d)\n",
+				node, device_ctx->queue[node].desc.name,
+				f->fmt.pix_mp.pixelformat,
+				f->fmt.pix_mp.width,
+				f->fmt.pix_mp.height,
+				f->fmt.pix_mp.plane_fmt[0].sizeimage);
+			node_ctx->fmt.pix_mp = f->fmt.pix_mp;
+		} else {
+			dev_info(&fd_dev->pdev->dev,
+				 "Node (%d): (%s), dfmt (f:0x%x s:%u)\n",
+				 node, device_ctx->queue[node].desc.name,
+				 f->fmt.meta.dataformat,
+				 f->fmt.meta.buffersize);
+			node_ctx->fmt.meta = f->fmt.meta;
+		}
+	}
+
+#if KERNEL_VERSION(4, 7, 0) < MTK_FD_KERNEL_BASE_VERSION
+	/* device_caps was supported after 4.7 */
+	vdev->device_caps = V4L2_CAP_STREAMING | cap;
+#endif
+}
+
+int mtk_fd_media_register(struct device *dev, struct media_device *media_dev,
+			  const char *model)
+{
+	int r = 0;
+
+	media_dev->dev = dev;
+	dev_info(dev, "setup media_dev.dev: %llx\n",
+		 (unsigned long long)media_dev->dev);
+
+	strlcpy(media_dev->model, model, sizeof(media_dev->model));
+	dev_info(dev, "setup media_dev.model: %s\n",
+		 media_dev->model);
+
+	snprintf(media_dev->bus_info, sizeof(media_dev->bus_info),
+		 "%s", dev_name(dev));
+	dev_info(dev, "setup media_dev.bus_info: %s\n",
+		 media_dev->bus_info);
+
+	media_dev->hw_revision = 0;
+	dev_info(dev, "setup media_dev.hw_revision: %d\n",
+		 media_dev->hw_revision);
+
+#if KERNEL_VERSION(4, 5, 0) <= MTK_FD_KERNEL_BASE_VERSION
+	dev_info(dev, "media_device_init: media_dev:%llx\n",
+		 (unsigned long long)media_dev);
+	media_device_init(media_dev);
+#endif
+
+	pr_info("Register media device: %s, %llx",
+		media_dev->model,
+		(unsigned long long)media_dev);
+
+	r = media_device_register(media_dev);
+
+	if (r) {
+		dev_err(dev, "failed to register media device (%d)\n", r);
+		goto fail_v4l2_dev;
+	}
+	return 0;
+
+fail_v4l2_dev:
+	media_device_unregister(media_dev);
+#if KERNEL_VERSION(4, 5, 0) <= MTK_FD_KERNEL_BASE_VERSION
+	media_device_cleanup(media_dev);
+#endif
+
+	return r;
+}
+EXPORT_SYMBOL_GPL(mtk_fd_media_register);
+
+int mtk_fd_v4l2_register(struct device *dev,
+			 struct media_device *media_dev,
+			 struct v4l2_device *v4l2_dev)
+{
+	int r = 0;
+	/* Set up v4l2 device */
+	v4l2_dev->mdev = media_dev;
+	dev_info(dev, "setup v4l2_dev->mdev: %llx",
+		 (unsigned long long)v4l2_dev->mdev);
+
+	dev_info(dev, "Register v4l2 device: %llx",
+		 (unsigned long long)v4l2_dev);
+
+	r = v4l2_device_register(dev, v4l2_dev);
+
+	if (r) {
+		dev_err(dev, "failed to register V4L2 device (%d)\n", r);
+		goto fail_v4l2_dev;
+	}
+
+	return 0;
+
+fail_v4l2_dev:
+	media_device_unregister(media_dev);
+#if KERNEL_VERSION(4, 5, 0) <= MTK_FD_KERNEL_BASE_VERSION
+	media_device_cleanup(media_dev);
+#endif
+
+	return r;
+}
+EXPORT_SYMBOL_GPL(mtk_fd_v4l2_register);
+
+int mtk_fd_mem2mem2_v4l2_register(struct mtk_fd_dev *dev,
+				  struct media_device *media_dev,
+				  struct v4l2_device *v4l2_dev)
+{
+	struct mtk_fd_mem2mem2_device *m2m2 = &dev->mem2mem2;
+
+	int i, r;
+
+	/**
+	 * If media_dev or v4l2_dev is not set,
+	 * use the default one in mtk_fd_dev
+	 */
+	if (!media_dev) {
+		m2m2->media_dev = &dev->media_dev;
+		r = mtk_fd_media_register(&dev->pdev->dev, m2m2->media_dev,
+					  m2m2->model);
+
+	if (r) {
+		dev_err(m2m2->dev, "failed to register media device (%d)\n", r);
+		goto fail_media_dev;
+	}
+	} else {
+		m2m2->media_dev = media_dev;
+	}
+
+	if (!v4l2_dev) {
+		m2m2->v4l2_dev = &dev->v4l2_dev;
+		r = mtk_fd_v4l2_register(&dev->pdev->dev,
+					 m2m2->media_dev,
+					 m2m2->v4l2_dev);
+	if (r) {
+		dev_err(m2m2->dev, "failed to register V4L2 device (%d)\n", r);
+		goto fail_v4l2_dev;
+	}
+	} else {
+		m2m2->v4l2_dev = v4l2_dev;
+	}
+
+	/* Initialize miscellaneous variables */
+	m2m2->streaming = false;
+	m2m2->v4l2_file_ops = mtk_fd_v4l2_fops;
+
+	/* Initialize subdev media entity */
+	m2m2->subdev_pads = kcalloc(m2m2->num_nodes, sizeof(*m2m2->subdev_pads),
+				    GFP_KERNEL);
+	if (!m2m2->subdev_pads) {
+		r = -ENOMEM;
+		goto fail_subdev_pads;
+	}
+#if KERNEL_VERSION(4, 5, 0) >= MTK_FD_KERNEL_BASE_VERSION
+	r = media_entity_init(&m2m2->subdev.entity, m2m2->num_nodes,
+			      m2m2->subdev_pads, 0);
+#else
+	r = media_entity_pads_init(&m2m2->subdev.entity, m2m2->num_nodes,
+				   m2m2->subdev_pads);
+#endif
+	if (r) {
+		dev_err(m2m2->dev,
+			"failed initialize subdev media entity (%d)\n", r);
+		goto fail_media_entity;
+	}
+
+	/* Initialize subdev */
+	v4l2_subdev_init(&m2m2->subdev, &mtk_fd_subdev_ops);
+
+	m2m2->subdev.entity.function =
+		MEDIA_ENT_F_PROC_VIDEO_PIXEL_FORMATTER;
+
+	m2m2->subdev.entity.ops = &mtk_fd_media_ops;
+
+	for (i = 0; i < m2m2->num_nodes; i++) {
+		m2m2->subdev_pads[i].flags = m2m2->nodes[i].output ?
+			MEDIA_PAD_FL_SINK : MEDIA_PAD_FL_SOURCE;
+	}
+
+	m2m2->subdev.flags =
+		V4L2_SUBDEV_FL_HAS_DEVNODE | V4L2_SUBDEV_FL_HAS_EVENTS;
+	snprintf(m2m2->subdev.name, sizeof(m2m2->subdev.name),
+		 "%s", m2m2->name);
+	v4l2_set_subdevdata(&m2m2->subdev, m2m2);
+	m2m2->subdev.internal_ops = &mtk_fd_subdev_internal_ops;
+
+	pr_info("register subdev: %s\n", m2m2->subdev.name);
+	r = v4l2_device_register_subdev(m2m2->v4l2_dev, &m2m2->subdev);
+	if (r) {
+		dev_err(m2m2->dev, "failed initialize subdev (%d)\n", r);
+		goto fail_subdev;
+	}
+	r = v4l2_device_register_subdev_nodes(m2m2->v4l2_dev);
+	if (r) {
+		dev_err(m2m2->dev, "failed to register subdevs (%d)\n", r);
+		goto fail_subdevs;
+	}
+
+	/* Create video nodes and links */
+	for (i = 0; i < m2m2->num_nodes; i++) {
+		struct mtk_fd_dev_video_device *node = &m2m2->nodes[i];
+		struct video_device *vdev = &node->vdev;
+		struct vb2_queue *vbq = &node->vbq;
+		u32 flags;
+
+		/* Initialize miscellaneous variables */
+		mutex_init(&node->lock);
+		INIT_LIST_HEAD(&node->buffers);
+
+		/* Initialize formats to default values */
+		mtk_fd_node_to_v4l2(dev, i, vdev, &node->vdev_fmt);
+
+		/* Initialize media entities */
+#if KERNEL_VERSION(4, 5, 0) >= MTK_FD_KERNEL_BASE_VERSION
+		r = media_entity_init(&vdev->entity, 1, &node->vdev_pad, 0);
+#else
+		r = media_entity_pads_init(&vdev->entity, 1, &node->vdev_pad);
+#endif
+		if (r) {
+			dev_err(m2m2->dev,
+				"failed initialize media entity (%d)\n", r);
+			goto fail_vdev_media_entity;
+		}
+		node->vdev_pad.flags = node->output ?
+			MEDIA_PAD_FL_SOURCE : MEDIA_PAD_FL_SINK;
+		vdev->entity.ops = NULL;
+
+		/* Initialize vbq */
+		vbq->type = node->vdev_fmt.type;
+		vbq->io_modes = VB2_MMAP | VB2_DMABUF;
+		vbq->ops = &mtk_fd_vb2_ops;
+		vbq->mem_ops = m2m2->vb2_mem_ops;
+		m2m2->buf_struct_size = sizeof(struct mtk_fd_dev_buffer);
+		vbq->buf_struct_size = m2m2->buf_struct_size;
+		vbq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
+		vbq->min_buffers_needed = 0;	/* Can streamon w/o buffers */
+		/* Put the process hub sub device in the vb2 private data*/
+		vbq->drv_priv = m2m2;
+		vbq->lock = &node->lock;
+		r = vb2_queue_init(vbq);
+		if (r) {
+			dev_err(m2m2->dev,
+				"failed to initialize video queue (%d)\n", r);
+			goto fail_vdev;
+		}
+
+		/* Initialize vdev */
+		snprintf(vdev->name, sizeof(vdev->name), "%s %s",
+			 m2m2->name, node->name);
+		vdev->release = video_device_release_empty;
+		vdev->fops = &m2m2->v4l2_file_ops;
+		vdev->lock = &node->lock;
+		vdev->v4l2_dev = m2m2->v4l2_dev;
+		vdev->queue = &node->vbq;
+		vdev->vfl_dir = node->output ? VFL_DIR_TX : VFL_DIR_RX;
+		video_set_drvdata(vdev, m2m2);
+		pr_info("register vdev: %s\n", vdev->name);
+		r = video_register_device(vdev, VFL_TYPE_GRABBER, -1);
+		if (r) {
+			dev_err(m2m2->dev,
+				"failed to register video device (%d)\n", r);
+			goto fail_vdev;
+		}
+
+		/* Create link between video node and the subdev pad */
+		flags = 0;
+		if (node->enabled)
+			flags |= MEDIA_LNK_FL_ENABLED;
+		if (node->immutable)
+			flags |= MEDIA_LNK_FL_IMMUTABLE;
+		if (node->output) {
+#if KERNEL_VERSION(4, 5, 0) >= MTK_FD_KERNEL_BASE_VERSION
+			r = media_entity_create_link
+#else
+			r = media_create_pad_link
+#endif
+						(&vdev->entity, 0,
+						 &m2m2->subdev.entity,
+						 i, flags);
+		} else {
+#if KERNEL_VERSION(4, 5, 0) >= MTK_FD_KERNEL_BASE_VERSION
+			r = media_entity_create_link
+#else
+			r = media_create_pad_link
+#endif
+						(&m2m2->subdev.entity,
+						 i, &vdev->entity, 0,
+						 flags);
+		}
+		if (r)
+			goto fail_link;
+	}
+
+	return 0;
+
+	for (; i >= 0; i--) {
+fail_link:
+		video_unregister_device(&m2m2->nodes[i].vdev);
+fail_vdev:
+		media_entity_cleanup(&m2m2->nodes[i].vdev.entity);
+fail_vdev_media_entity:
+		mutex_destroy(&m2m2->nodes[i].lock);
+	}
+fail_subdevs:
+	v4l2_device_unregister_subdev(&m2m2->subdev);
+fail_subdev:
+	media_entity_cleanup(&m2m2->subdev.entity);
+fail_media_entity:
+	kfree(m2m2->subdev_pads);
+fail_subdev_pads:
+	v4l2_device_unregister(m2m2->v4l2_dev);
+fail_v4l2_dev:
+fail_media_dev:
+	pr_err("fail_v4l2_dev: media_device_unregister and clenaup:%llx",
+	       (unsigned long long)m2m2->media_dev);
+	media_device_unregister(m2m2->media_dev);
+#if KERNEL_VERSION(4, 5, 0) <= MTK_FD_KERNEL_BASE_VERSION
+	media_device_cleanup(m2m2->media_dev);
+#endif
+
+	return r;
+}
+EXPORT_SYMBOL_GPL(mtk_fd_mem2mem2_v4l2_register);
+
+int mtk_fd_v4l2_unregister(struct mtk_fd_dev *dev)
+{
+	struct mtk_fd_mem2mem2_device *m2m2 = &dev->mem2mem2;
+	unsigned int i;
+
+	for (i = 0; i < m2m2->num_nodes; i++) {
+		video_unregister_device(&m2m2->nodes[i].vdev);
+		media_entity_cleanup(&m2m2->nodes[i].vdev.entity);
+		mutex_destroy(&m2m2->nodes[i].lock);
+	}
+
+	v4l2_device_unregister_subdev(&m2m2->subdev);
+	media_entity_cleanup(&m2m2->subdev.entity);
+	kfree(m2m2->subdev_pads);
+	v4l2_device_unregister(m2m2->v4l2_dev);
+	media_device_unregister(m2m2->media_dev);
+#if KERNEL_VERSION(4, 5, 0) <= MTK_FD_KERNEL_BASE_VERSION
+	media_device_cleanup(m2m2->media_dev);
+#endif
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(mtk_fd_v4l2_unregister);
+
+void mtk_fd_v4l2_buffer_done(struct vb2_buffer *vb,
+			     enum vb2_buffer_state state)
+{
+	struct mtk_fd_mem2mem2_buffer *b =
+		container_of(vb, struct mtk_fd_mem2mem2_buffer, vbb.vb2_buf);
+
+	list_del(&b->list);
+	vb2_buffer_done(&b->vbb.vb2_buf, state);
+}
+EXPORT_SYMBOL_GPL(mtk_fd_v4l2_buffer_done);
diff --git a/drivers/media/platform/mtk-isp/fd/mtk_fd-v4l2.c b/drivers/media/platform/mtk-isp/fd/mtk_fd-v4l2.c
new file mode 100644
index 0000000..bd447b7
--- /dev/null
+++ b/drivers/media/platform/mtk-isp/fd/mtk_fd-v4l2.c
@@ -0,0 +1,114 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (c) 2018 MediaTek Inc.
+ * Author: Frederic Chen <frederic.chen-NuS5LvNUpcJWk0Htik3J/w@public.gmane.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/device.h>
+#include <linux/platform_device.h>
+#include "mtk_fd.h"
+#include "mtk_fd-ctx.h"
+#include "mtk_fd-v4l2.h"
+
+static struct mtk_fd_ctx_format fd_param_fmts[] = {
+	{
+		.fmt.meta = {
+		.dataformat = V4L2_META_FMT_MTISP_PARAMS,
+		.max_buffer_size = 1024 * 30,
+		},
+	},
+};
+
+static struct mtk_fd_ctx_format in_fmts[] = {
+	{
+		.fmt.img = {
+			.pixelformat  = V4L2_PIX_FMT_VYUY,
+			.depth    = { 16 },
+			.row_depth  = { 16 },
+			.num_planes = 1,
+		},
+	},
+	{
+		.fmt.img = {
+			.pixelformat  = V4L2_PIX_FMT_YUYV,
+			.depth    = { 16 },
+			.row_depth  = { 16 },
+			.num_planes = 1,
+		},
+	},
+	{
+		.fmt.img = {
+			.pixelformat  = V4L2_PIX_FMT_YVYU,
+			.depth	  = { 16 },
+			.row_depth  = { 16 },
+			.num_planes = 1,
+		},
+	},
+	{
+		.fmt.img = {
+			.pixelformat  = V4L2_PIX_FMT_UYVY,
+			.depth    = { 16 },
+			.row_depth  = { 16 },
+			.num_planes = 1,
+		},
+	},
+};
+
+static struct mtk_fd_ctx_queue_desc
+output_queues[MTK_FD_CTX_FD_TOTAL_OUTPUT] = {
+	{
+		.id = MTK_FD_CTX_FD_YUV_IN,
+		.name = "FDInput",
+		.capture = 0,
+		.image = 1,
+		.fmts = in_fmts,
+		.num_fmts = ARRAY_SIZE(in_fmts),
+		.default_fmt_idx = 1,
+	},
+	{
+		.id = MTK_FD_CTX_FD_CONFIG_IN,
+		.name = "FDConfig",
+		.capture = 0,
+		.image = 0,
+		.fmts = fd_param_fmts,
+		.num_fmts = 1,
+		.default_fmt_idx = 0,
+	},
+};
+
+static struct mtk_fd_ctx_queue_desc
+capture_queues[MTK_FD_CTX_FD_TOTAL_CAPTURE] = {
+	{
+		.id = MTK_FD_CTX_FD_OUT,
+		.name = "FDOutput",
+		.capture = 1,
+		.image = 0,
+		.fmts = fd_param_fmts,
+		.num_fmts = 1,
+		.default_fmt_idx = 0,
+	},
+};
+
+static struct mtk_fd_ctx_queues_setting queues_setting = {
+	.master = MTK_FD_CTX_FD_OUT,
+	.output_queue_descs = output_queues,
+	.total_output_queues = MTK_FD_CTX_FD_TOTAL_OUTPUT,
+	.capture_queue_descs = capture_queues,
+	.total_capture_queues = MTK_FD_CTX_FD_TOTAL_CAPTURE,
+};
+
+int mtk_fd_ctx_fd_init(struct mtk_fd_ctx *ctx)
+{
+	/* Initialize main data structure */
+	return mtk_fd_ctx_core_queue_setup(ctx, &queues_setting);
+}
+EXPORT_SYMBOL_GPL(mtk_fd_ctx_fd_init);
diff --git a/drivers/media/platform/mtk-isp/fd/mtk_fd-v4l2.h b/drivers/media/platform/mtk-isp/fd/mtk_fd-v4l2.h
new file mode 100644
index 0000000..0702abc
--- /dev/null
+++ b/drivers/media/platform/mtk-isp/fd/mtk_fd-v4l2.h
@@ -0,0 +1,36 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (c) 2018 MediaTek Inc.
+ * Author: Frederic Chen <frederic.chen-NuS5LvNUpcJWk0Htik3J/w@public.gmane.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#ifndef __MTK_FD_V4L2__
+#define __MTK_FD_V4L2__
+
+#include <linux/types.h>
+#include "mtk_fd-ctx.h"
+
+#define MTK_FD_DEV_NAME     "MTK-FD-V4L2"
+
+/* Input: YUV image */
+#define MTK_FD_CTX_FD_YUV_IN		0
+/* Input: FD Configuration */
+#define MTK_FD_CTX_FD_CONFIG_IN		1
+#define MTK_FD_CTX_FD_TOTAL_OUTPUT	2
+
+/* OUT: FD output devices*/
+#define MTK_FD_CTX_FD_OUT		2
+#define MTK_FD_CTX_FD_TOTAL_CAPTURE	1
+
+int mtk_fd_ctx_fd_init(struct mtk_fd_ctx *ctx);
+
+#endif /*__MTK_FD_V4L2__*/
diff --git a/drivers/media/platform/mtk-isp/fd/mtk_fd.c b/drivers/media/platform/mtk-isp/fd/mtk_fd.c
new file mode 100644
index 0000000..7e2fd00
--- /dev/null
+++ b/drivers/media/platform/mtk-isp/fd/mtk_fd.c
@@ -0,0 +1,730 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2015 MediaTek Inc.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/types.h>
+#include <linux/device.h>
+#include <linux/kdev_t.h>
+
+#include <linux/platform_device.h>
+#include <linux/dma-mapping.h>
+#include <linux/mm_types.h>
+#include <linux/mm.h>
+#include <linux/jiffies.h>
+#include <linux/sched.h>
+#include <linux/uaccess.h>
+#include <asm/page.h>
+#include <linux/vmalloc.h>
+#include <linux/interrupt.h>
+#include <linux/wait.h>
+
+#include <linux/of_platform.h>
+#include <linux/of_irq.h>
+#include <linux/of_address.h>
+#include <linux/of_device.h>
+
+#include "mtk_fd.h"
+#include "mtk_fd-core.h"
+
+#include "mtk_vpu.h"
+
+#include <linux/pm_runtime.h>
+#include <linux/clk.h>
+
+#ifdef CONFIG_PM_WAKELOCKS
+#include <linux/pm_wakeup.h>
+#else
+#include <linux/wakelock.h>
+#endif
+
+#define FD_DRVNAME	"mtk-fd"
+
+static const struct of_device_id mtk_fd_of_ids[] = {
+	/* Remider: Add this device node manually in .dtsi */
+	{ .compatible = "mediatek,fd", },
+	{}
+};
+MODULE_DEVICE_TABLE(of, mtk_fd_of_ids);
+
+static void mtk_fd_prepare_enable_ccf_clock(struct mtk_fd_drv_dev *fd_hw_dev)
+{
+	int ret;
+
+	pm_runtime_get_sync(fd_hw_dev->larb_dev);
+	ret = clk_prepare_enable(fd_hw_dev->fd_clk);
+	if (ret)
+		dev_err(&fd_hw_dev->pdev->dev,
+			"cannot prepare and enable CG_IMGSYS_FD clock\n");
+}
+
+static void mtk_fd_disable_unprepare_ccf_clock(struct mtk_fd_drv_dev *fd_hw_dev)
+{
+	clk_disable_unprepare(fd_hw_dev->fd_clk);
+}
+
+static int mtk_fd_clk_ctrl(struct mtk_fd_drv_dev *fd_hw_dev, int en)
+{
+	if (en)
+		mtk_fd_prepare_enable_ccf_clock(fd_hw_dev);
+	else
+		mtk_fd_disable_unprepare_ccf_clock(fd_hw_dev);
+
+	dev_dbg(&fd_hw_dev->pdev->dev, "clock en: %d\n", en);
+
+	return 0;
+}
+
+static int mtk_fd_wait_irq(struct mtk_fd_drv_dev *fd_hw_dev)
+{
+	int timeout;
+
+	timeout = wait_event_interruptible_timeout
+		(fd_hw_dev->wq,
+		 (fd_hw_dev->fd_irq_result & FD_IRQ_MASK),
+		 mtk_fd_us_to_jiffies(1 * 1000000));
+
+	if (timeout == 0) {
+		dev_err(&fd_hw_dev->pdev->dev,
+			"%s timeout, %d\n",
+			__func__, fd_hw_dev->fd_irq_result);
+		return -EAGAIN;
+	}
+
+	dev_dbg(&fd_hw_dev->pdev->dev, "irq_res: 0x%8x\n",
+		fd_hw_dev->fd_irq_result);
+
+	if (timeout != 0 && !(fd_hw_dev->fd_irq_result & FD_IRQ_MASK)) {
+		dev_err(&fd_hw_dev->pdev->dev,
+			"%s interrupted by system signal, return value(%d)\n",
+			__func__, timeout);
+		return -ERESTARTSYS;
+	}
+
+	if (!(fd_hw_dev->fd_irq_result & FD_IRQ_MASK)) {
+		dev_err(&fd_hw_dev->pdev->dev,
+			"%s Not FD, %d\n",
+			__func__, fd_hw_dev->fd_irq_result);
+		return -1;
+	}
+
+	fd_hw_dev->fd_irq_result = 0;
+
+	return 0;
+}
+
+static int mtk_fd_send_ipi_init(struct platform_device *pdev,
+				struct fd_buffer *scp_mem)
+{
+	struct ipi_message fd_init_msg;
+
+	fd_init_msg.cmd_id = FD_CMD_INIT;
+	fd_init_msg.fd_manager = *scp_mem;
+
+	vpu_ipi_send(pdev, IPI_FD_CMD, &fd_init_msg, sizeof(fd_init_msg));
+
+	return 0;
+}
+
+static int mtk_fd_send_ipi_cmd(struct platform_device *pdev,
+			       struct v4l2_fd_param *fd_param)
+{
+	struct ipi_message fd_ipi_msg;
+
+	fd_ipi_msg.cmd_id = FD_CMD_ENQ;
+	fd_ipi_msg.fd_param = *fd_param;
+
+	vpu_ipi_send_sync_async(pdev, IPI_FD_CMD, &fd_ipi_msg,
+				sizeof(fd_ipi_msg), 0);
+	return 0;
+}
+
+static irqreturn_t mtk_fd_irq(int irq, void *dev_addr)
+{
+	struct mtk_fd_drv_dev *fd_hw_dev;
+
+	fd_hw_dev = (struct mtk_fd_drv_dev *)dev_addr;
+	fd_hw_dev->fd_irq_result = FD_RD32(fd_hw_dev->fd_base + FD_INT);
+	wake_up_interruptible(&fd_hw_dev->wq);
+
+	return IRQ_HANDLED;
+}
+
+static int mtk_fd_do_callback(struct mtk_fd_drv_dev *fd_hw_dev,
+			      unsigned int frame_state)
+{
+	struct mtk_fd_ctx_finish_param fparam;
+	struct mtk_isp_fd_drv_data *drv_data;
+	struct device *dev;
+	int ret = 0;
+
+	drv_data = mtk_fd_hw_dev_to_drv(fd_hw_dev);
+	dev = &drv_data->fd_hw_dev.pdev->dev;
+
+	fparam.state = frame_state;
+	fparam.frame_id = fd_hw_dev->fd_ctx.frame_id;
+	dev_dbg(dev, "frame_id(%d)\n", fparam.frame_id);
+
+	ret = mtk_fd_ctx_core_job_finish(&drv_data->fd_dev.ctx, &fparam);
+	if (ret)
+		dev_err(dev, "frame_id(%d), finish op failed: %d\n",
+			fparam.frame_id, ret);
+	else
+		fd_hw_dev->state = FD_CBD;
+
+	return ret;
+}
+
+static int mtk_fd_dequeue(struct mtk_fd_drv_dev *fd_hw_dev,
+			  struct v4l2_fd_param *fd_param)
+{
+	struct mtk_isp_fd_drv_data *drv_data;
+	struct fd_user_output *fd_output;
+	u32 num = 0, i = 0;
+
+	dev_dbg(&fd_hw_dev->pdev->dev, "-E. %s.\n", __func__);
+
+	if ((uint64_t)fd_hw_dev->fd_base < VA_OFFSET) {
+		dev_info(&fd_hw_dev->pdev->dev,
+			 "-X. %s. fd_base_error: %p\n",
+			 __func__, fd_hw_dev->fd_base);
+		return -1;
+	}
+
+	num = FD_RD32(fd_hw_dev->fd_base + FD_RESULT);
+	FD_WR32(0x0, fd_hw_dev->fd_base + FD_INT_EN);
+	fd_output = (struct fd_user_output *)fd_param->fd_user_result.va;
+	fd_output->face_number = num;
+
+	drv_data = mtk_fd_hw_dev_to_drv(fd_hw_dev);
+	if ((uint64_t)drv_data < VA_OFFSET) {
+		dev_dbg(&fd_hw_dev->pdev->dev,
+			"-X. %s. fd_base_error\n", __func__);
+		return -1;
+	}
+	mtk_fd_do_callback(fd_hw_dev, MTK_FD_CTX_FRAME_DATA_DONE);
+
+	for (i = 0; i < num; i++) {
+		dev_dbg(&fd_hw_dev->pdev->dev,
+			"id:%d, typ:%d, x0:%d, y0:%d, x1:%d, y1:%d, fcv:0x%x\n",
+			fd_output->face[i].face_idx,
+			fd_output->face[i].type,
+			fd_output->face[i].x0,
+			fd_output->face[i].y0,
+			fd_output->face[i].x1,
+			fd_output->face[i].y1,
+			fd_output->face[i].fcv);
+	}
+	dev_dbg(&fd_hw_dev->pdev->dev, "-X. %s.\n", __func__);
+	return 0;
+}
+
+static int mtk_fd_manager_buf_init(struct mtk_fd_drv_dev *fd_hw_dev)
+{
+	struct fd_manager_ctx *manager_ctx;
+
+	manager_ctx = (struct fd_manager_ctx *)fd_hw_dev->fd_ctx.scp_mem.va;
+	manager_ctx->rs_result = fd_hw_dev->fd_ctx.rs_result;
+
+	return 0;
+}
+
+static int mtk_fd_alloc_rs_buf(struct mtk_fd_drv_dev *fd_hw_dev)
+{
+	u64 va = 0;
+	dma_addr_t dma_handle = 0;
+	u32 size = RS_BUF_SIZE_MAX;
+
+	va = (uint64_t)dma_alloc_coherent(&fd_hw_dev->pdev->dev, size,
+	&dma_handle, GFP_KERNEL);
+
+	dev_dbg(&fd_hw_dev->pdev->dev, "rsbuffer size: %u\n", size);
+	dev_dbg(&fd_hw_dev->pdev->dev, "va = 0x%llx, iova = 0x%x\n", va,
+		dma_handle);
+
+	if (va == 0) {
+		dev_err(&fd_hw_dev->pdev->dev, "dma_alloc null va!\n");
+		return -1;
+	}
+
+	memset((uint8_t *)va, 0, size);
+
+	fd_hw_dev->fd_ctx.rs_result.va = va;
+	fd_hw_dev->fd_ctx.rs_result.iova = dma_handle;
+
+	return 0;
+}
+
+static int mtk_fd_get_reserve_mem(struct mtk_fd_drv_dev *fd_hw_dev)
+{
+	phys_addr_t scp_mem_pa;
+	u64 scp_mem_va;
+	u32 scp_mem_iova;
+	u32 size = 0, size_align = 0;
+	struct sg_table *sgt;
+	int n_pages = 0, i = 0, ret = 0;
+	struct page **pages = NULL;
+	struct mtk_fd_drv_ctx *fd_ctx;
+	struct platform_device *pdev = fd_hw_dev->pdev;
+
+	fd_ctx = &fd_hw_dev->fd_ctx;
+
+	scp_mem_iova = 0;
+	scp_mem_va = vpu_get_reserve_mem_virt(FD_MEM_ID);
+	scp_mem_pa = vpu_get_reserve_mem_phys(FD_MEM_ID);
+	size = (u32)vpu_get_reserve_mem_size(FD_MEM_ID);
+
+	dev_dbg(&pdev->dev, "fd_scp_mem va: 0x%llx, pa: 0x%llx, sz:0x%x\n",
+		scp_mem_va, (u64)scp_mem_pa, size);
+
+	if (scp_mem_va != 0 && size > 0)
+		memset((void *)scp_mem_va, 0, size);
+
+	/* get iova */
+	sgt = &fd_ctx->sgtable;
+	sg_alloc_table(sgt, 1, GFP_KERNEL);
+
+	size_align = round_up(size, PAGE_SIZE);
+	n_pages = size_align >> PAGE_SHIFT;
+
+	pages = kmalloc_array(n_pages, sizeof(struct page *), GFP_KERNEL);
+
+	for (i = 0; i < n_pages; i++)
+		pages[i] = phys_to_page(scp_mem_pa + i * PAGE_SIZE);
+	ret = sg_alloc_table_from_pages(sgt, pages, n_pages,
+					0, size_align, GFP_KERNEL);
+
+	if (ret) {
+		dev_err(&pdev->dev, "failed to get allocate sg table\n");
+		kfree(pages);
+		return ret;
+	}
+
+	dma_map_sg_attrs(&pdev->dev, sgt->sgl, sgt->nents,
+			 DMA_BIDIRECTIONAL, DMA_ATTR_SKIP_CPU_SYNC);
+	scp_mem_iova = sg_dma_address(sgt->sgl);
+	kfree(pages);
+
+	dev_dbg(&fd_hw_dev->pdev->dev, "scpmem size:%u,0x%X\n", size, size);
+	dev_dbg(&fd_hw_dev->pdev->dev, "pa:0x%08X\n", (u32)scp_mem_pa);
+	dev_dbg(&fd_hw_dev->pdev->dev, "va:0x%16llX\n", (u64)scp_mem_va);
+	dev_dbg(&fd_hw_dev->pdev->dev, "iova:0x%08X\n", (u32)scp_mem_iova);
+
+	fd_ctx->scp_mem.pa = scp_mem_pa;
+	fd_ctx->scp_mem.va = scp_mem_va;
+	fd_ctx->scp_mem.iova = scp_mem_iova;
+
+	return 0;
+}
+
+static int mtk_fd_load_vpu(struct mtk_fd_drv_dev *fd_hw_dev)
+{
+	struct mtk_fd_drv_ctx *fd_ctx;
+	int ret = 0;
+
+	fd_ctx = &fd_hw_dev->fd_ctx;
+
+	/* init vpu */
+	fd_ctx->vpu_pdev = vpu_get_plat_device(fd_hw_dev->pdev);
+
+	if (!fd_ctx->vpu_pdev) {
+		dev_err(&fd_hw_dev->pdev->dev,
+			"Failed to get VPU device\n");
+		return -EINVAL;
+	}
+
+	ret = vpu_load_firmware(fd_ctx->vpu_pdev);
+	if (ret < 0) {
+		/**
+		 * Return 0 if downloading firmware successfully,
+		 * otherwise it is failed
+		 */
+		dev_err(&fd_hw_dev->pdev->dev,
+			"vpu_load_firmware failed!");
+		return -EINVAL;
+	}
+	return ret;
+}
+
+static int mtk_fd_open_context(struct mtk_fd_drv_dev *fd_hw_dev)
+{
+	struct mtk_fd_drv_ctx *fd_ctx;
+
+	fd_ctx = &fd_hw_dev->fd_ctx;
+
+	mtk_fd_load_vpu(fd_hw_dev);
+
+	mtk_fd_get_reserve_mem(fd_hw_dev);
+	mtk_fd_alloc_rs_buf(fd_hw_dev);
+	mtk_fd_manager_buf_init(fd_hw_dev);
+
+	mtk_fd_send_ipi_init(fd_ctx->vpu_pdev, &fd_ctx->scp_mem);
+	return 0;
+}
+
+static int mtk_fd_release_context(struct mtk_fd_drv_dev *fd_hw_dev)
+{
+	struct mtk_fd_drv_ctx *fd_ctx;
+
+	fd_ctx = &fd_hw_dev->fd_ctx;
+
+	atomic_set(&fd_ctx->fd_user_cnt, 0);
+	atomic_set(&fd_ctx->fd_stream_cnt, 0);
+	atomic_set(&fd_ctx->fd_enque_cnt, 0);
+	sg_free_table(&fd_ctx->sgtable);
+
+	return 0;
+}
+
+int mtk_fd_open(struct platform_device *pdev)
+{
+	int ret = 0;
+	s32 usercount;
+	struct mtk_fd_drv_dev *fd_hw_dev;
+	struct mtk_isp_fd_drv_data *fd_drv;
+	struct mtk_fd_drv_ctx *fd_ctx;
+
+	dev_dbg(&pdev->dev, "- E. %s.\n", __func__);
+
+	if (!pdev) {
+		dev_err(&fd_hw_dev->pdev->dev, "platform device is NULL\n");
+		return -EINVAL;
+	}
+
+	fd_drv = dev_get_drvdata(&pdev->dev);
+	fd_hw_dev = &fd_drv->fd_hw_dev;
+	fd_ctx = &fd_hw_dev->fd_ctx;
+	dev_dbg(&fd_hw_dev->pdev->dev, "open fd_hw_dev = 0x%p\n", fd_hw_dev);
+	dev_dbg(&fd_hw_dev->pdev->dev, "open fd_drv = 0x%p\n", fd_drv);
+
+	usercount = atomic_inc_return(&fd_hw_dev->fd_ctx.fd_user_cnt);
+
+	if (usercount == 1) {
+		/* Enable clock */
+		pm_runtime_get_sync(&fd_hw_dev->pdev->dev);
+
+		mtk_fd_open_context(fd_hw_dev);
+		fd_hw_dev->state = FD_INI;
+		fd_hw_dev->streaming = STREAM_OFF;
+	}
+
+	dev_dbg(&fd_hw_dev->pdev->dev, "usercount = %d",
+		atomic_read(&fd_ctx->fd_user_cnt));
+
+	dev_dbg(&fd_hw_dev->pdev->dev, "X. %s\n", __func__);
+
+	return ret;
+}
+EXPORT_SYMBOL(mtk_fd_open);
+
+int mtk_fd_streamon(struct platform_device *pdev, u16 id)
+{
+	int ret = 0;
+	struct mtk_fd_drv_dev *fd_hw_dev;
+	struct mtk_isp_fd_drv_data *fd_drv;
+
+	fd_drv = dev_get_drvdata(&pdev->dev);
+	fd_hw_dev = &fd_drv->fd_hw_dev;
+
+	dev_dbg(&pdev->dev, "- E. %s\n", __func__);
+	fd_hw_dev->streaming = STREAM_ON;
+	atomic_inc_return(&fd_hw_dev->fd_ctx.fd_stream_cnt);
+
+	dev_dbg(&pdev->dev, "- X. %s\n", __func__);
+	return ret;
+}
+EXPORT_SYMBOL(mtk_fd_streamon);
+
+int mtk_fd_enqueue(struct platform_device *pdev,
+		   struct v4l2_fd_param *fd_param)
+{
+	struct mtk_fd_drv_dev *fd_hw_dev;
+	struct mtk_fd_drv_ctx *fd_ctx;
+	struct mtk_isp_fd_drv_data *fd_drv;
+
+	dev_dbg(&pdev->dev, "- E. %s\n", __func__);
+	fd_drv = dev_get_drvdata(&pdev->dev);
+	fd_hw_dev = &fd_drv->fd_hw_dev;
+	fd_ctx = &fd_hw_dev->fd_ctx;
+
+	fd_ctx->frame_id = fd_param->frame_id;
+
+	if (fd_hw_dev->streaming == STREAM_OFF || fd_hw_dev->state == FD_ENQ) {
+		dev_err(&fd_hw_dev->pdev->dev, "enqueue before stream on!\n");
+		return mtk_fd_do_callback(fd_hw_dev,
+						MTK_FD_CTX_FRAME_DATA_ERROR);
+	}
+
+	fd_hw_dev->state = FD_ENQ;
+	atomic_inc_return(&fd_ctx->fd_enque_cnt);
+
+	if (mtk_fd_send_ipi_cmd(fd_ctx->vpu_pdev, fd_param))
+		return -2;
+
+	if (mtk_fd_wait_irq(fd_hw_dev))
+		return mtk_fd_do_callback(fd_hw_dev,
+						MTK_FD_CTX_FRAME_DATA_ERROR);
+
+	mtk_fd_dequeue(fd_hw_dev, fd_param);
+
+	dev_dbg(&pdev->dev, "- E. %s\n", __func__);
+	return 0;
+}
+EXPORT_SYMBOL(mtk_fd_enqueue);
+
+int mtk_fd_release(struct platform_device *pdev)
+{
+	int ret = 0;
+	struct mtk_fd_drv_dev *fd_hw_dev;
+	struct mtk_isp_fd_drv_data *fd_drv;
+
+	fd_drv = dev_get_drvdata(&pdev->dev);
+	fd_hw_dev = &fd_drv->fd_hw_dev;
+	dev_dbg(&fd_hw_dev->pdev->dev, "- E. %s\n", __func__);
+
+	if (!pdev) {
+		dev_err(&fd_hw_dev->pdev->dev, "platform device is NULL\n");
+		return -EINVAL;
+	}
+
+	dev_info(&fd_hw_dev->pdev->dev, "release fd_hw_dev: 0x%p\n", fd_hw_dev);
+
+	if (atomic_dec_and_test(&fd_hw_dev->fd_ctx.fd_user_cnt)) {
+		if (fd_hw_dev->state == FD_ENQ)
+			mtk_fd_wait_irq(fd_hw_dev);
+
+		mtk_fd_release_context(fd_hw_dev);
+
+		pm_runtime_put_sync(&fd_hw_dev->pdev->dev);
+	}
+	dev_info(&fd_hw_dev->pdev->dev, "usercount = %d\n",
+		 atomic_read(&fd_hw_dev->fd_ctx.fd_user_cnt));
+
+	dev_dbg(&fd_hw_dev->pdev->dev, "- X. %s\n", __func__);
+	return ret;
+}
+EXPORT_SYMBOL(mtk_fd_release);
+
+int mtk_fd_streamoff(struct platform_device *pdev, u16 id)
+{
+	int ret = 0;
+	struct mtk_fd_drv_dev *fd_hw_dev;
+	struct mtk_isp_fd_drv_data *fd_drv;
+
+	fd_drv = dev_get_drvdata(&pdev->dev);
+	fd_hw_dev = &fd_drv->fd_hw_dev;
+
+	dev_dbg(&pdev->dev, "- E. %s\n", __func__);
+
+	if (fd_hw_dev->state == FD_ENQ)
+		mtk_fd_wait_irq(fd_hw_dev);
+
+	fd_hw_dev->streaming = STREAM_OFF;
+	atomic_dec_return(&fd_hw_dev->fd_ctx.fd_stream_cnt);
+
+	dev_dbg(&pdev->dev, "- X. %s\n", __func__);
+	return ret;
+}
+EXPORT_SYMBOL(mtk_fd_streamoff);
+
+static struct mtk_fd_ctx_desc mtk_isp_ctx_desc_fd = {
+	"proc_device_fd", mtk_fd_ctx_fd_init,};
+
+static int mtk_fd_probe(struct platform_device *pdev)
+{
+	struct mtk_isp_fd_drv_data *fd_drv;
+	struct mtk_fd_drv_dev *fd_hw_dev;
+	struct mtk_fd_drv_ctx *fd_ctx;
+	struct device_node *node;
+	struct platform_device *larb_pdev;
+	int irq_num = 0;
+	int ret = 0;
+
+	dev_info(&pdev->dev, "E. %s.\n", __func__);
+
+	fd_drv = devm_kzalloc(&pdev->dev, sizeof(*fd_drv), GFP_KERNEL);
+
+	if (!fd_drv)
+		return -ENOMEM;
+
+	dev_set_drvdata(&pdev->dev, fd_drv);
+	fd_hw_dev = &fd_drv->fd_hw_dev;
+
+	if (!fd_hw_dev) {
+		dev_err(&pdev->dev, "Unable to allocate fd_hw_dev\n");
+		return -ENOMEM;
+	}
+
+	dev_info(&pdev->dev, "open fd_hw_dev = 0x%p\n", fd_hw_dev);
+	dev_info(&pdev->dev, "open fd_drv = 0x%p\n", fd_drv);
+
+	fd_hw_dev->pdev = pdev;
+	fd_ctx = &fd_hw_dev->fd_ctx;
+
+	irq_num = irq_of_parse_and_map(pdev->dev.of_node, FD_IRQ_IDX);
+	ret = request_irq(irq_num, (irq_handler_t)mtk_fd_irq,
+			  IRQF_TRIGGER_NONE, FD_DRVNAME, fd_hw_dev);
+	if (ret) {
+		dev_info(&pdev->dev, "%s request_irq fail, irq=%d\n",
+			 __func__, irq_num);
+		return ret;
+	}
+	dev_info(&pdev->dev, "irq_num=%d\n", irq_num);
+
+	node = of_parse_phandle(pdev->dev.of_node, "mediatek,larb", 0);
+	if (!node) {
+		dev_err(&pdev->dev, "no mediatek, larb found");
+		return -EINVAL;
+	}
+	larb_pdev = of_find_device_by_node(node);
+	if (!larb_pdev) {
+		dev_err(&pdev->dev, "no mediatek, larb device found");
+		return -EINVAL;
+	}
+	fd_hw_dev->larb_dev = &larb_pdev->dev;
+
+	node = of_find_compatible_node(NULL, NULL, "mediatek,fd");
+	if (!node) {
+		dev_err(&pdev->dev, "find fd node failed!!!\n");
+		return -ENODEV;
+	}
+	fd_hw_dev->fd_base = of_iomap(node, 0);
+	if (!fd_hw_dev->fd_base) {
+		dev_err(&pdev->dev, "unable to map fd node!!!\n");
+		return -ENODEV;
+	}
+	dev_info(&pdev->dev, "fd_hw_dev->fd_base: %lx\n",
+		 (unsigned long)fd_hw_dev->fd_base);
+
+	/* CCF: Grab clock pointer (struct clk*) */
+	fd_hw_dev->fd_clk = devm_clk_get(&pdev->dev, "FD_CLK_IMG_FD");
+	if (IS_ERR(fd_hw_dev->fd_clk)) {
+		dev_err(&pdev->dev, "cannot get FD_CLK_IMG_FD clock\n");
+		return PTR_ERR(fd_hw_dev->fd_clk);
+	}
+
+	pm_runtime_enable(&pdev->dev);
+
+	atomic_set(&fd_ctx->fd_user_cnt, 0);
+	atomic_set(&fd_ctx->fd_stream_cnt, 0);
+	atomic_set(&fd_ctx->fd_enque_cnt, 0);
+
+	init_waitqueue_head(&fd_hw_dev->wq);
+
+	fd_hw_dev->fd_irq_result = 0;
+	fd_hw_dev->streaming = STREAM_OFF;
+
+	ret = mtk_fd_dev_core_init(pdev, &fd_drv->fd_dev, &mtk_isp_ctx_desc_fd);
+
+	if (ret)
+		dev_err(&pdev->dev, "v4l2 init failed: %d\n", ret);
+
+	dev_info(&pdev->dev, "X. FD driver probe.\n");
+
+	return 0;
+}
+
+static int mtk_fd_remove(struct platform_device *pdev)
+{
+	int i4IRQ = 0;
+	struct mtk_fd_drv_dev *fd_hw_dev = NULL;
+	struct mtk_isp_fd_drv_data *drv_data = dev_get_drvdata(&pdev->dev);
+
+	dev_info(&fd_hw_dev->pdev->dev, "-E. %s\n", __func__);
+	if (drv_data) {
+		mtk_fd_dev_core_release(pdev, &drv_data->fd_dev);
+		fd_hw_dev = &drv_data->fd_hw_dev;
+	} else {
+		dev_err(&pdev->dev, "Can't find fd driver data\n");
+		return -EINVAL;
+	}
+
+	mtk_fd_clk_ctrl(fd_hw_dev, clock_off);
+	pm_runtime_disable(&pdev->dev);
+
+	i4IRQ = platform_get_irq(pdev, 0);
+	free_irq(i4IRQ, NULL);
+	kfree(fd_hw_dev);
+
+	dev_info(&fd_hw_dev->pdev->dev, "-X. %s\n", __func__);
+	return 0;
+}
+
+static int mtk_fd_suspend(struct device *dev)
+{
+	struct mtk_isp_fd_drv_data *fd_drv;
+	struct platform_device *pdev;
+	struct mtk_fd_drv_dev *fd_hw_dev;
+
+	if (pm_runtime_suspended(dev))
+		return 0;
+
+	fd_drv = dev_get_drvdata(dev);
+	fd_hw_dev = &fd_drv->fd_hw_dev;
+	pdev = fd_hw_dev->pdev;
+
+	dev_info(&pdev->dev, "E.%s\n", __func__);
+
+	if (atomic_read(&fd_hw_dev->fd_ctx.fd_user_cnt) > 0) {
+		mtk_fd_clk_ctrl(fd_hw_dev, clock_off);
+		dev_info(&pdev->dev, "Disable clock\n");
+	}
+
+	dev_info(&pdev->dev, "X.%s\n", __func__);
+	return 0;
+}
+
+static int mtk_fd_resume(struct device *dev)
+{
+	struct mtk_isp_fd_drv_data *fd_drv;
+	struct platform_device *pdev;
+	struct mtk_fd_drv_dev *fd_hw_dev;
+
+	if (pm_runtime_suspended(dev))
+		return 0;
+
+	fd_drv = dev_get_drvdata(dev);
+	fd_hw_dev = &fd_drv->fd_hw_dev;
+	pdev = fd_hw_dev->pdev;
+
+	dev_info(&pdev->dev, "E.%s\n", __func__);
+
+	if (atomic_read(&fd_hw_dev->fd_ctx.fd_user_cnt) > 0) {
+		mtk_fd_clk_ctrl(fd_hw_dev, clock_on);
+		dev_info(&pdev->dev, "Enable clock\n");
+	}
+
+	dev_info(&pdev->dev, "X.%s\n", __func__);
+	return 0;
+}
+
+static const struct dev_pm_ops mtk_fd_pm_ops = {
+	SET_SYSTEM_SLEEP_PM_OPS(mtk_fd_suspend, mtk_fd_resume)
+	SET_RUNTIME_PM_OPS(mtk_fd_suspend, mtk_fd_resume, NULL)
+};
+
+static struct platform_driver mtk_fd_driver = {
+	.probe   = mtk_fd_probe,
+	.remove  = mtk_fd_remove,
+	.driver  = {
+		.name  = FD_DRVNAME,
+		.of_match_table = mtk_fd_of_ids,
+		.pm = &mtk_fd_pm_ops,
+	}
+};
+module_platform_driver(mtk_fd_driver);
+
+MODULE_DESCRIPTION("Mediatek FD driver");
+MODULE_LICENSE("GPL");
diff --git a/drivers/media/platform/mtk-isp/fd/mtk_fd.h b/drivers/media/platform/mtk-isp/fd/mtk_fd.h
new file mode 100644
index 0000000..6cae440
--- /dev/null
+++ b/drivers/media/platform/mtk-isp/fd/mtk_fd.h
@@ -0,0 +1,127 @@
+/* SPDX-License-Identifier: GPL-2.0
+ * Copyright (C) 2015 MediaTek Inc.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#ifndef __MTK_FD_H__
+#define __MTK_FD_H__
+
+#define MTK_FD_MAX_NO		(1024)
+#define MAX_FACE_SEL_NUM	(MTK_FD_MAX_NO + 2)
+
+/* The max number of face sizes could be detected, for feature scaling */
+#define FACE_SIZE_NUM_MAX	(14)
+
+/* FACE_SIZE_NUM_MAX + 1, first scale for input image W/H */
+#define FD_SCALE_NUM		(15)
+
+/* Number of Learning data sets */
+#define LEARNDATA_NUM		(18)
+
+struct fd_buffer {
+	__u64 va;	/* used by APMCU access */
+	__u32 pa;	/* used by CM4 access */
+	__u32 iova;	/* used by HW access */
+} __packed;
+
+enum fd_img_format {
+	FMT_VYUY = 2,
+	FMT_UYVY,
+	FMT_YVYU,
+	FMT_YUYV,
+};
+
+enum fd_mode {
+	FDMODE,
+	SDMODE,
+	VFB,
+	CFB,
+};
+
+struct fd_face_result {
+	__u64 face_idx:12, type:1, x0:10, y0:10, x1:10, y1:10,
+		fcv:18, rip_dir:4, rop_dir:3, det_size:5;
+};
+
+struct fd_user_output {
+	struct fd_face_result face[MAX_FACE_SEL_NUM];
+	__u16 face_number;
+};
+
+struct v4l2_fd_param {
+	u32 frame_id;
+	u16 src_img_h;
+	u16 src_img_w;
+	struct fd_buffer src_img;
+	struct fd_buffer fd_user_param;
+	struct fd_buffer fd_user_result;
+} __packed;
+
+/**
+ * mtk_fd_enqueue - enqueue to fd driver
+ *
+ * @pdev: FD platform device
+ * @fdvtconfig: frame parameters from V4L2 common Framework
+ *
+ * Enqueue a frame to fd driver.
+ *
+ * Return: Return 0 if successfully, otherwise it is failed.
+ */
+int mtk_fd_enqueue(struct platform_device *pdev,
+		   struct v4l2_fd_param *fd_param);
+
+/**
+ * mtk_fd_open -
+ *
+ * @pdev: FD platform device
+ *
+ * Open the FD device driver
+ *
+ * Return: Return 0 if success, otherwise it is failed.
+ */
+int mtk_fd_open(struct platform_device *pdev);
+
+/**
+ * mtk_fd_release -
+ *
+ * @pdev: FD platform device
+ *
+ * Enqueue a frame to FD driver.
+ *
+ * Return: Return 0 if success, otherwise it is failed.
+ */
+int mtk_fd_release(struct platform_device *pdev);
+
+/**
+ * mtk_fd_streamon -
+ *
+ * @pdev: FD platform device
+ * @id: device context id
+ *
+ * Stream on
+ *
+ * Return: Return 0 if success, otherwise it is failed.
+ */
+int mtk_fd_streamon(struct platform_device *pdev, u16 id);
+
+/**
+ * mtk_fd_streamoff -
+ *
+ * @pdev: FD platform device
+ * @id: device context id
+ *
+ * Stream off
+ *
+ * Return: Return 0 if success, otherwise it is failed.
+ */
+int mtk_fd_streamoff(struct platform_device *pdev, u16 id);
+
+#endif/*__MTK_FD_H__*/
-- 
1.9.1