IMG DEC V4L2 Interface function implementations

Add Low-level VXD interface component and v4l2 wrapper Interface
for VXD driver.

Signed-off-by: Sunita Nadampalli <sunitan@ti.com>
Signed-off-by: Sidraya <sidraya.bj@pathpartnertech.com>

MAINTAINERS

@@ -19593,6 +19593,7 @@ F:	drivers/staging/media/vxd/common/rman_api.c
 F:	drivers/staging/media/vxd/common/rman_api.h
 F:	drivers/staging/media/vxd/common/talmmu_api.c
 F:	drivers/staging/media/vxd/common/talmmu_api.h
+F:	drivers/staging/media/vxd/common/vid_buf.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/Kconfig
@@ -19668,6 +19669,7 @@ F;	drivers/staging/media/vxd/decoder/vxd_props.h
 F:	drivers/staging/media/vxd/decoder/vxd_pvdec.c
 F:	drivers/staging/media/vxd/decoder/vxd_pvdec_priv.h
 F:	drivers/staging/media/vxd/decoder/vxd_pvdec_regs.h
+F:	drivers/staging/media/vxd/decoder/vxd_v4l2.c
 
 VIDEO I2C POLLING DRIVER
 M:	Matt Ranostay <matt.ranostay@konsulko.com>

drivers/staging/media/vxd/common/vid_buf.h

@@ -0,0 +1,42 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Low-level VXD interface component
+ *
+ * Copyright (c) Imagination Technologies Ltd.
+ * Copyright (c) 2021 Texas Instruments Incorporated - http://www.ti.com/
+ *
+ * Authors:
+ *	Angela Stegmaier <angelabaker@ti.com>
+ *
+ * Re-written for upstream
+ *	Sidraya Jayagond <sidraya.bj@pathpartnertech.com>
+ */
+
+#ifndef _VID_BUF_H
+#define _VID_BUF_H
+
+/*
+ * struct vidio_ddbufinfo - contains information about virtual address
+ * @buf_size: the size of the buffer (in bytes).
+ * @cpu_virt: the cpu virtual address  (mapped into the local cpu mmu)
+ * @dev_virt: device virtual address (pages mapped into IMG H/W mmu)
+ * @hndl_memory: handle to device mmu mapping
+ * @buff_id: buffer id used in communication with interface
+ * @is_internal: true, if the buffer is allocated internally
+ * @ref_count: reference count (number of users)
+ * @kmstr_id: stream id
+ * @core_id: core id
+ */
+struct vidio_ddbufinfo {
+	unsigned int buf_size;
+	void *cpu_virt;
+	unsigned int dev_virt;
+	void *hndl_memory;
+	unsigned int buff_id;
+	unsigned int is_internal;
+	unsigned int ref_count;
+	unsigned int kmstr_id;
+	unsigned int core_id;
+};
+
+#endif /* _VID_BUF_H */