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From:   sidraya.bj@pathpartnertech.com
To:     gregkh@linuxfoundation.org, linux-staging@lists.linux.dev,
        linux-kernel@vger.kernel.org
Cc:     prashanth.ka@pathpartnertech.com, praneeth@ti.com,
        mchehab@kernel.org, linux-media@vger.kernel.org,
        praveen.ap@pathpartnertech.com,
        Sidraya <sidraya.bj@pathpartnertech.com>
Subject: [PATCH 10/30] v4l: vxd-dec: Add utility modules
Date:   Wed, 18 Aug 2021 19:40:17 +0530
Message-Id: <20210818141037.19990-11-sidraya.bj@pathpartnertech.com>
In-Reply-To: <20210818141037.19990-1-sidraya.bj@pathpartnertech.com>
References: <20210818141037.19990-1-sidraya.bj@pathpartnertech.com>
Content-Type: text/plain; charset="US-ASCII"
Precedence: bulk

From: Sidraya <sidraya.bj@pathpartnertech.com>

Contains utility module for double linked queues, single linked
lists and workqueue.

Signed-off-by: Lakshmi Sankar <lakshmisankar-t@ti.com>
Signed-off-by: Sidraya <sidraya.bj@pathpartnertech.com>
---
 MAINTAINERS                                   |   6 +
 drivers/staging/media/vxd/common/dq.c         | 248 ++++++++++++++++++
 drivers/staging/media/vxd/common/dq.h         |  36 +++
 drivers/staging/media/vxd/common/lst.c        | 119 +++++++++
 drivers/staging/media/vxd/common/lst.h        |  37 +++
 drivers/staging/media/vxd/common/work_queue.c | 188 +++++++++++++
 drivers/staging/media/vxd/common/work_queue.h |  66 +++++
 7 files changed, 700 insertions(+)
 create mode 100644 drivers/staging/media/vxd/common/dq.c
 create mode 100644 drivers/staging/media/vxd/common/dq.h
 create mode 100644 drivers/staging/media/vxd/common/lst.c
 create mode 100644 drivers/staging/media/vxd/common/lst.h
 create mode 100644 drivers/staging/media/vxd/common/work_queue.c
 create mode 100644 drivers/staging/media/vxd/common/work_queue.h

diff --git a/MAINTAINERS b/MAINTAINERS
index 0468aaac3b7d..2668eeb89a34 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -19537,6 +19537,8 @@ M:	Sidraya Jayagond <sidraya.bj@pathpartnertech.com>
 L:	linux-media@vger.kernel.org
 S:	Maintained
 F:	Documentation/devicetree/bindings/media/img,d5520-vxd.yaml
+F:	drivers/staging/media/vxd/common/dq.c
+F:	drivers/staging/media/vxd/common/dq.h
 F:	drivers/staging/media/vxd/common/idgen_api.c
 F:	drivers/staging/media/vxd/common/idgen_api.h
 F:	drivers/staging/media/vxd/common/img_mem_man.c
@@ -19544,6 +19546,10 @@ F:	drivers/staging/media/vxd/common/img_mem_man.h
 F:	drivers/staging/media/vxd/common/img_mem_unified.c
 F:	drivers/staging/media/vxd/common/imgmmu.c
 F:	drivers/staging/media/vxd/common/imgmmu.h
+F:	drivers/staging/media/vxd/common/lst.c
+F:	drivers/staging/media/vxd/common/lst.h
+F:	drivers/staging/media/vxd/common/work_queue.c
+F:	drivers/staging/media/vxd/common/work_queue.h
 F:	drivers/staging/media/vxd/decoder/hw_control.c
 F:	drivers/staging/media/vxd/decoder/hw_control.h
 F:	drivers/staging/media/vxd/decoder/img_dec_common.h
diff --git a/drivers/staging/media/vxd/common/dq.c b/drivers/staging/media/vxd/common/dq.c
new file mode 100644
index 000000000000..890be5ed00e7
--- /dev/null
+++ b/drivers/staging/media/vxd/common/dq.c
@@ -0,0 +1,248 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Utility module for doubly linked queues.
+ *
+ * Copyright (c) Imagination Technologies Ltd.
+ * Copyright (c) 2021 Texas Instruments Incorporated - http://www.ti.com/
+ *
+ * Authors:
+ *	Lakshmi Sankar <lakshmisankar-t@ti.com>
+ *
+ * Re-written for upstreamimg
+ *	Sidraya Jayagond <sidraya.bj@pathpartnertech.com>
+ */
+
+#include <linux/types.h>
+#include <linux/dma-mapping.h>
+#include <media/v4l2-ctrls.h>
+#include <media/v4l2-device.h>
+#include <media/v4l2-mem2mem.h>
+
+#include "dq.h"
+#include "img_errors.h"
+
+void dq_init(struct dq_linkage_t *queue)
+{
+	queue->fwd = (struct dq_linkage_t *)queue;
+	queue->back = (struct dq_linkage_t *)queue;
+}
+
+void dq_addhead(struct dq_linkage_t *queue, void *item)
+{
+	IMG_DBG_ASSERT(((struct dq_linkage_t *)queue)->back);
+	IMG_DBG_ASSERT(((struct dq_linkage_t *)queue)->fwd);
+
+	if (!((struct dq_linkage_t *)queue)->back ||
+	    !((struct dq_linkage_t *)queue)->fwd)
+		return;
+
+	((struct dq_linkage_t *)item)->back = (struct dq_linkage_t *)queue;
+	((struct dq_linkage_t *)item)->fwd =
+					((struct dq_linkage_t *)queue)->fwd;
+	((struct dq_linkage_t *)queue)->fwd->back = (struct dq_linkage_t *)item;
+	((struct dq_linkage_t *)queue)->fwd = (struct dq_linkage_t *)item;
+}
+
+void dq_addtail(struct dq_linkage_t *queue, void *item)
+{
+	IMG_DBG_ASSERT(((struct dq_linkage_t *)queue)->back);
+	IMG_DBG_ASSERT(((struct dq_linkage_t *)queue)->fwd);
+
+	if (!((struct dq_linkage_t *)queue)->back ||
+	    !((struct dq_linkage_t *)queue)->fwd)
+		return;
+
+	((struct dq_linkage_t *)item)->fwd = (struct dq_linkage_t *)queue;
+	((struct dq_linkage_t *)item)->back =
+					((struct dq_linkage_t *)queue)->back;
+	((struct dq_linkage_t *)queue)->back->fwd = (struct dq_linkage_t *)item;
+	((struct dq_linkage_t *)queue)->back = (struct dq_linkage_t *)item;
+}
+
+int dq_empty(struct dq_linkage_t *queue)
+{
+	IMG_DBG_ASSERT(((struct dq_linkage_t *)queue)->back);
+	IMG_DBG_ASSERT(((struct dq_linkage_t *)queue)->fwd);
+
+	if (!((struct dq_linkage_t *)queue)->back ||
+	    !((struct dq_linkage_t *)queue)->fwd)
+		return 1;
+
+	return ((queue)->fwd == (struct dq_linkage_t *)(queue));
+}
+
+void *dq_first(struct dq_linkage_t *queue)
+{
+	struct dq_linkage_t *temp = queue->fwd;
+
+	IMG_DBG_ASSERT(((struct dq_linkage_t *)queue)->back);
+	IMG_DBG_ASSERT(((struct dq_linkage_t *)queue)->fwd);
+
+	if (!((struct dq_linkage_t *)queue)->back ||
+	    !((struct dq_linkage_t *)queue)->fwd)
+		return NULL;
+
+	return temp == (struct dq_linkage_t *)queue ? NULL : temp;
+}
+
+void *dq_last(struct dq_linkage_t *queue)
+{
+	struct dq_linkage_t *temp = queue->back;
+
+	IMG_DBG_ASSERT(((struct dq_linkage_t *)queue)->back);
+	IMG_DBG_ASSERT(((struct dq_linkage_t *)queue)->fwd);
+
+	if (!((struct dq_linkage_t *)queue)->back ||
+	    !((struct dq_linkage_t *)queue)->fwd)
+		return NULL;
+
+	return temp == (struct dq_linkage_t *)queue ? NULL : temp;
+}
+
+void *dq_next(void *item)
+{
+	IMG_DBG_ASSERT(((struct dq_linkage_t *)item)->back);
+	IMG_DBG_ASSERT(((struct dq_linkage_t *)item)->fwd);
+
+	if (!((struct dq_linkage_t *)item)->back ||
+	    !((struct dq_linkage_t *)item)->fwd)
+		return NULL;
+
+	return ((struct dq_linkage_t *)item)->fwd;
+}
+
+void *dq_previous(void *item)
+{
+	IMG_DBG_ASSERT(((struct dq_linkage_t *)item)->back);
+	IMG_DBG_ASSERT(((struct dq_linkage_t *)item)->fwd);
+
+	if (!((struct dq_linkage_t *)item)->back ||
+	    !((struct dq_linkage_t *)item)->fwd)
+		return NULL;
+
+	return ((struct dq_linkage_t *)item)->back;
+}
+
+void dq_remove(void *item)
+{
+	IMG_DBG_ASSERT(((struct dq_linkage_t *)item)->back);
+	IMG_DBG_ASSERT(((struct dq_linkage_t *)item)->fwd);
+
+	if (!((struct dq_linkage_t *)item)->back ||
+	    !((struct dq_linkage_t *)item)->fwd)
+		return;
+
+	((struct dq_linkage_t *)item)->fwd->back =
+					((struct dq_linkage_t *)item)->back;
+	((struct dq_linkage_t *)item)->back->fwd =
+					((struct dq_linkage_t *)item)->fwd;
+
+	/* make item linkages safe for "orphan" removes */
+	((struct dq_linkage_t *)item)->fwd = item;
+	((struct dq_linkage_t *)item)->back = item;
+}
+
+void *dq_removehead(struct dq_linkage_t *queue)
+{
+	struct dq_linkage_t *temp;
+
+	IMG_DBG_ASSERT(((struct dq_linkage_t *)queue)->back);
+	IMG_DBG_ASSERT(((struct dq_linkage_t *)queue)->fwd);
+
+	if (!((struct dq_linkage_t *)queue)->back ||
+	    !((struct dq_linkage_t *)queue)->fwd)
+		return NULL;
+
+	if ((queue)->fwd == (struct dq_linkage_t *)(queue))
+		return NULL;
+
+	temp = ((struct dq_linkage_t *)queue)->fwd;
+	temp->fwd->back = temp->back;
+	temp->back->fwd = temp->fwd;
+
+	/* make item linkages safe for "orphan" removes */
+	temp->fwd = temp;
+	temp->back = temp;
+	return temp;
+}
+
+void *dq_removetail(struct dq_linkage_t *queue)
+{
+	struct dq_linkage_t *temp;
+
+	IMG_DBG_ASSERT(((struct dq_linkage_t *)queue)->back);
+	IMG_DBG_ASSERT(((struct dq_linkage_t *)queue)->fwd);
+
+	if (!((struct dq_linkage_t *)queue)->back ||
+	    !((struct dq_linkage_t *)queue)->fwd)
+		return NULL;
+
+	if ((queue)->fwd == (struct dq_linkage_t *)(queue))
+		return NULL;
+
+	temp = ((struct dq_linkage_t *)queue)->back;
+	temp->fwd->back = temp->back;
+	temp->back->fwd = temp->fwd;
+
+	/* make item linkages safe for "orphan" removes */
+	temp->fwd = temp;
+	temp->back = temp;
+
+	return temp;
+}
+
+void dq_addbefore(void *successor, void *item)
+{
+	IMG_DBG_ASSERT(((struct dq_linkage_t *)successor)->back);
+	IMG_DBG_ASSERT(((struct dq_linkage_t *)successor)->fwd);
+
+	if (!((struct dq_linkage_t *)successor)->back ||
+	    !((struct dq_linkage_t *)successor)->fwd)
+		return;
+
+	((struct dq_linkage_t *)item)->fwd = (struct dq_linkage_t *)successor;
+	((struct dq_linkage_t *)item)->back =
+				((struct dq_linkage_t *)successor)->back;
+	((struct dq_linkage_t *)item)->back->fwd = (struct dq_linkage_t *)item;
+	((struct dq_linkage_t *)successor)->back = (struct dq_linkage_t *)item;
+}
+
+void dq_addafter(void *predecessor, void *item)
+{
+	IMG_DBG_ASSERT(((struct dq_linkage_t *)predecessor)->back);
+	IMG_DBG_ASSERT(((struct dq_linkage_t *)predecessor)->fwd);
+
+	if (!((struct dq_linkage_t *)predecessor)->back ||
+	    !((struct dq_linkage_t *)predecessor)->fwd)
+		return;
+
+	((struct dq_linkage_t *)item)->fwd =
+				((struct dq_linkage_t *)predecessor)->fwd;
+	((struct dq_linkage_t *)item)->back =
+					(struct dq_linkage_t *)predecessor;
+	((struct dq_linkage_t *)item)->fwd->back = (struct dq_linkage_t *)item;
+	((struct dq_linkage_t *)predecessor)->fwd = (struct dq_linkage_t *)item;
+}
+
+void dq_move(struct dq_linkage_t *from, struct dq_linkage_t *to)
+{
+	IMG_DBG_ASSERT(((struct dq_linkage_t *)from)->back);
+	IMG_DBG_ASSERT(((struct dq_linkage_t *)from)->fwd);
+	IMG_DBG_ASSERT(((struct dq_linkage_t *)to)->back);
+	IMG_DBG_ASSERT(((struct dq_linkage_t *)to)->fwd);
+
+	if (!((struct dq_linkage_t *)from)->back ||
+	    !((struct dq_linkage_t *)from)->fwd ||
+	    !((struct dq_linkage_t *)to)->back ||
+	    !((struct dq_linkage_t *)to)->fwd)
+		return;
+
+	if ((from)->fwd == (struct dq_linkage_t *)(from)) {
+		dq_init(to);
+	} else {
+		*to = *from;
+		to->fwd->back = (struct dq_linkage_t *)to;
+		to->back->fwd = (struct dq_linkage_t *)to;
+		dq_init(from);
+	}
+}
diff --git a/drivers/staging/media/vxd/common/dq.h b/drivers/staging/media/vxd/common/dq.h
new file mode 100644
index 000000000000..4663a92aaf7a
--- /dev/null
+++ b/drivers/staging/media/vxd/common/dq.h
@@ -0,0 +1,36 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Utility module for doubly linked queues.
+ *
+ * Copyright (c) Imagination Technologies Ltd.
+ * Copyright (c) 2021 Texas Instruments Incorporated - http://www.ti.com/
+ *
+ * Authors:
+ *	Lakshmi Sankar <lakshmisankar-t@ti.com>
+ */
+#ifndef DQ_H
+#define DQ_H
+
+/* dq structure */
+struct dq_linkage_t {
+	struct dq_linkage_t *fwd;
+	struct dq_linkage_t *back;
+};
+
+/* Function Prototypes */
+void dq_addafter(void *predecessor, void *item);
+void dq_addbefore(void *successor, void *item);
+void dq_addhead(struct dq_linkage_t *queue, void *item);
+void dq_addtail(struct dq_linkage_t *queue, void *item);
+int dq_empty(struct dq_linkage_t *queue);
+void *dq_first(struct dq_linkage_t *queue);
+void *dq_last(struct dq_linkage_t *queue);
+void dq_init(struct dq_linkage_t *queue);
+void dq_move(struct dq_linkage_t *from, struct dq_linkage_t *to);
+void *dq_next(void *item);
+void *dq_previous(void *item);
+void dq_remove(void *item);
+void *dq_removehead(struct dq_linkage_t *queue);
+void *dq_removetail(struct dq_linkage_t *queue);
+
+#endif /* #define DQ_H */
diff --git a/drivers/staging/media/vxd/common/lst.c b/drivers/staging/media/vxd/common/lst.c
new file mode 100644
index 000000000000..bb047ab6d598
--- /dev/null
+++ b/drivers/staging/media/vxd/common/lst.c
@@ -0,0 +1,119 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * List processing primitives.
+ *
+ * Copyright (c) Imagination Technologies Ltd.
+ * Copyright (c) 2021 Texas Instruments Incorporated - http://www.ti.com/
+ *
+ * Author:
+ *	Lakshmi Sankar <lakshmisankar-t@ti.com>
+ */
+
+#include "lst.h"
+
+#ifndef NULL
+#define NULL ((void *)0)
+#endif
+
+void lst_add(struct lst_t *list, void *item)
+{
+	if (!list->first) {
+		list->first = item;
+		list->last = item;
+	} else {
+		*list->last = item;
+		list->last = item;
+	}
+	*((void **)item) = NULL;
+}
+
+void lst_addhead(struct lst_t *list, void *item)
+{
+	if (!list->first) {
+		list->first = item;
+		list->last = item;
+		*((void **)item) = NULL;
+	} else {
+		*((void **)item) = list->first;
+		list->first = item;
+	}
+}
+
+int lst_empty(struct lst_t *list)
+{
+	if (!list->first)
+		return 1;
+	else
+		return 0;
+}
+
+void *lst_first(struct lst_t *list)
+{
+	return list->first;
+}
+
+void lst_init(struct lst_t *list)
+{
+	list->first = NULL;
+	list->last = NULL;
+}
+
+void *lst_last(struct lst_t *list)
+{
+	return list->last;
+}
+
+void *lst_next(void *item)
+{
+	return *((void **)item);
+}
+
+void *lst_removehead(struct lst_t *list)
+{
+	void **temp = list->first;
+
+	if (temp) {
+		list->first = *temp;
+		if (!list->first)
+			list->last = NULL;
+	}
+	return temp;
+}
+
+void *lst_remove(struct lst_t *list, void *item)
+{
+	void **p;
+	void **q;
+
+	p = (void **)list;
+	q = *p;
+	while (q) {
+		if (q == item) {
+			*p = *q;
+			if (list->last == q)
+				list->last = p;
+			return item;
+		}
+		p = q;
+		q = *p;
+	}
+
+	return NULL;
+}
+
+int lst_check(struct lst_t *list, void *item)
+{
+	void **p;
+	void **q;
+
+	p = (void **)list;
+	q = *p;
+	while (q) {
+		if (q == item)
+			return 1;
+		p = q;
+		q = *p;
+	}
+
+	return 0;
+}
diff --git a/drivers/staging/media/vxd/common/lst.h b/drivers/staging/media/vxd/common/lst.h
new file mode 100644
index 000000000000..ccf6eed19019
--- /dev/null
+++ b/drivers/staging/media/vxd/common/lst.h
@@ -0,0 +1,37 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * List processing primitives.
+ *
+ * Copyright (c) Imagination Technologies Ltd.
+ * Copyright (c) 2021 Texas Instruments Incorporated - http://www.ti.com/
+ *
+ * Author:
+ *	Lakshmi Sankar <lakshmisankar-t@ti.com>
+ */
+#ifndef __LIST_H__
+#define __LIST_H__
+
+#include <linux/types.h>
+
+struct lst_t {
+	void **first;
+	void **last;
+};
+
+void lst_add(struct lst_t *list, void *item);
+void lst_addhead(struct lst_t *list, void *item);
+
+/**
+ * lst_empty- Is list empty?
+ * @list: pointer to list
+ */
+int  lst_empty(struct lst_t *list);
+void *lst_first(struct lst_t *list);
+void lst_init(struct lst_t *list);
+void *lst_last(struct lst_t *list);
+void *lst_next(void *item);
+void *lst_remove(struct lst_t *list, void *item);
+void *lst_removehead(struct lst_t *list);
+int lst_check(struct lst_t *list, void *item);
+
+#endif /* __LIST_H__ */
diff --git a/drivers/staging/media/vxd/common/work_queue.c b/drivers/staging/media/vxd/common/work_queue.c
new file mode 100644
index 000000000000..6bd91a7fdbf4
--- /dev/null
+++ b/drivers/staging/media/vxd/common/work_queue.c
@@ -0,0 +1,188 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Work Queue Handling for Linux
+ *
+ * Copyright (c) Imagination Technologies Ltd.
+ * Copyright (c) 2021 Texas Instruments Incorporated - http://www.ti.com/
+ *
+ * Authors:
+ *	Lakshmi Sankar <lakshmisankar-t@ti.com>
+ *
+ * Re-written for upstream
+ *	Prashanth Kumar Amai <prashanth.ka@pathpartnertech.com>
+ */
+
+#include <linux/slab.h>
+#include <linux/printk.h>
+#include <linux/mutex.h>
+
+#include "work_queue.h"
+
+/* Defining and initilizing mutex
+ */
+DEFINE_MUTEX(mutex);
+
+#define false 0
+#define true 1
+
+struct node {
+	void **key;
+	struct node *next;
+};
+
+struct node *work_head;
+struct node *delayed_work_head;
+
+void init_work(void **work_args, void *work_fn, uint8_t hwa_id)
+{
+	struct work_struct **work = (struct work_struct **)work_args;
+	//create a link
+	struct node *link = kmalloc(sizeof(*link), GFP_KERNEL);
+
+	*work = kzalloc(sizeof(*work), GFP_KERNEL);
+	if (!(*work)) {
+		pr_err("Memory allocation failed for work_queue\n");
+		return;
+	}
+	INIT_WORK(*work, work_fn);
+
+	link->key = (void **)work;
+	mutex_lock(&mutex);
+	//point it to old first node
+	link->next = work_head;
+
+	//point first to new first node
+	work_head = link;
+	mutex_unlock(&mutex);
+}
+
+void init_delayed_work(void **work_args, void *work_fn, uint8_t hwa_id)
+{
+	struct delayed_work **work = (struct delayed_work **)work_args;
+	//create a link
+	struct node *link = kmalloc(sizeof(*link), GFP_KERNEL);
+
+	*work = kzalloc(sizeof(*work), GFP_KERNEL);
+	if (!(*work)) {
+		pr_err("Memory allocation failed for delayed_work_queue\n");
+		return;
+	}
+	INIT_DELAYED_WORK(*work, work_fn);
+
+	link->key = (void **)work;
+	mutex_lock(&mutex);
+	//point it to old first node
+	link->next = delayed_work_head;
+
+	//point first to new first node
+	delayed_work_head = link;
+	mutex_unlock(&mutex);
+}
+
+/**
+ * get_work_buff - get_work_buff
+ * @key: key value
+ * @flag: flag
+ */
+
+void *get_work_buff(void *key, signed char flag)
+{
+	struct node *data = NULL;
+	void *work_new = NULL;
+	struct node *temp = NULL;
+	struct node *previous = NULL;
+	struct work_struct **work = NULL;
+
+	//start from the first link
+	mutex_lock(&mutex);
+	temp = work_head;
+
+	//if list is empty
+	if (!work_head) {
+		mutex_unlock(&mutex);
+		return NULL;
+	}
+
+	work = ((struct work_struct **)(temp->key));
+	//navigate through list
+	while (*work != key) {
+		//if it is last node
+		if (!temp->next) {
+			mutex_unlock(&mutex);
+			return NULL;
+		}
+			//store reference to current link
+			previous = temp;
+			//move to next link
+			temp = temp->next;
+			work = ((struct work_struct **)(temp->key));
+	}
+
+	if (flag) {
+		//found a match, update the link
+		if (temp == work_head) {
+			//change first to point to next link
+			work_head = work_head->next;
+		} else {
+			//bypass the current link
+			previous->next = temp->next;
+		}
+	}
+
+	mutex_unlock(&mutex);
+	//return temp;
+	data = temp;
+	if (data) {
+		work_new = data->key;
+		if (flag)
+			kfree(data);
+	}
+	return work_new;
+}
+
+void *get_delayed_work_buff(void *key, signed char flag)
+{
+	struct node *data = NULL;
+	void *dwork_new = NULL;
+	struct node *temp = NULL;
+	struct node *previous = NULL;
+	struct delayed_work **dwork = NULL;
+
+	if (flag) {
+		/* This Condition is true when kernel module is removed */
+		return delayed_work_head;
+	}
+	//start from the first link
+	mutex_lock(&mutex);
+	temp = delayed_work_head;
+
+	//if list is empty
+	if (!delayed_work_head) {
+		mutex_unlock(&mutex);
+		return NULL;
+	}
+
+	dwork = ((struct delayed_work **)(temp->key));
+	//navigate through list
+	while (&(*dwork)->work != key) {
+		//if it is last node
+		if (!temp->next) {
+			mutex_unlock(&mutex);
+			return NULL;
+		}
+			//store reference to current link
+			previous = temp;
+			//move to next link
+			temp = temp->next;
+			dwork = ((struct delayed_work **)(temp->key));
+	}
+
+	mutex_unlock(&mutex);
+	data = temp;
+	if (data) {
+		dwork_new = data->key;
+		if (flag)
+			kfree(data);
+	}
+	return dwork_new;
+}
diff --git a/drivers/staging/media/vxd/common/work_queue.h b/drivers/staging/media/vxd/common/work_queue.h
new file mode 100644
index 000000000000..44ed423334e2
--- /dev/null
+++ b/drivers/staging/media/vxd/common/work_queue.h
@@ -0,0 +1,66 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Work Queue Related Definitions
+ *
+ * Copyright (c) Imagination Technologies Ltd.
+ * Copyright (c) 2021 Texas Instruments Incorporated - http://www.ti.com/
+ *
+ * Authors:
+ *	Lakshmi Sankar <lakshmisankar-t@ti.com>
+ *
+ * Re-written for upstream
+ *	Prashanth Kumar Amai <prashanth.ka@pathpartnertech.com>
+ */
+
+#ifndef WORKQUEUE_H_
+#define WORKQUEUE_H_
+
+#include <linux/types.h>
+
+enum {
+	HWA_DECODER   = 0,
+	HWA_ENCODER    = 1,
+	HWA_FORCE32BITS = 0x7FFFFFFFU
+};
+
+/*
+ * init_work - This function provides the necessary initialization
+ * and saving given pointer(work_args) in linked list.
+ * @work_args: structure for the initialization
+ * @work_fn: work function pointer
+ *
+ * This function provides the necessary initialization
+ * and setting of the handler function (passed by the user).
+ */
+void init_work(void **work_args, void *work_fn, uint8_t hwa_id);
+
+/*
+ * init_delayed_work - This function provides the necessary initialization.
+ * and saving given pointer(work_args) in linked list.
+ * @work_args: structure for the initialization
+ * @work_fn: work function pointer
+ *
+ * This function provides the necessary initialization
+ * and setting of the handler function (passed by the user).
+ */
+void init_delayed_work(void **work_args, void *work_fn, uint8_t hwa_id);
+
+/*
+ * get_delayed_work_buff - This function return base address of given pointer
+ * @key: The given work struct pointer
+ * @flag: If TRUE, delete the node from the linked list.
+ *
+ * Return: Base address of the given input buffer.
+ */
+void *get_delayed_work_buff(void *key, signed char flag);
+
+/**
+ * get_work_buff - This function return base address of given pointer
+ * @key: The given work struct pointer
+ * @flag: If TRUE, delete the node from the linked list.
+ *
+ * Return: Base address of the given input buffer.
+ */
+void *get_work_buff(void *key, signed char flag);
+
+#endif /* WORKQUEUE_H_ */
-- 
2.17.1


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