diff --git a/drivers/staging/media/vpu-vc8000e-kernel/linux/kernel_module/vc8000_vcmd_driver.c b/drivers/staging/media/vpu-vc8000e-kernel/linux/kernel_module/vc8000_vcmd_driver.c
index 9d433d853..0f559401b 100644
--- a/drivers/staging/media/vpu-vc8000e-kernel/linux/kernel_module/vc8000_vcmd_driver.c
+++ b/drivers/staging/media/vpu-vc8000e-kernel/linux/kernel_module/vc8000_vcmd_driver.c
@@ -2610,63 +2610,12 @@ static int hantrovcmd_release(struct inode *inode, struct file *filp)
     return 0;
 }
 
-static bool hantroenc_cmdbuf_range(size_t addr, size_t size);
-
-static int mmap_cmdbuf_mem(struct file *file, struct vm_area_struct *vma)
-{
-    size_t size = vma->vm_end - vma->vm_start;
-    phys_addr_t offset = (phys_addr_t)vma->vm_pgoff << PAGE_SHIFT;
-
-    /* Does it even fit in phys_addr_t? */
-    if (offset >> PAGE_SHIFT != vma->vm_pgoff)
-        return -EINVAL;
-
-    /* It's illegal to wrap around the end of the physical address space. */
-    if (offset + (phys_addr_t)size - 1 < offset)
-        return -EINVAL;
-
-
-    vma->vm_page_prot = phys_mem_access_prot(file, vma->vm_pgoff,
-                        size,
-                        vma->vm_page_prot);
-
-    /* Remap-pfn-range will mark the range VM_IO */
-    if (remap_pfn_range(vma,
-                        vma->vm_start,
-                        vma->vm_pgoff,
-                        size,
-                        vma->vm_page_prot))
-    {
-        return -EAGAIN;
-    }
-
-    return 0;
-}
-
-static int mmap_mem(struct file *file, struct vm_area_struct *vma)
-{
-    size_t size = vma->vm_end - vma->vm_start;
-    phys_addr_t offset = (phys_addr_t)vma->vm_pgoff << PAGE_SHIFT;
-
-    if (hantroenc_cmdbuf_range(offset, size))
-    {
-        return mmap_cmdbuf_mem(file, vma);
-    }
-    else
-    {
-        return -EINVAL;
-        /*TODO: need check if not need enc,in this condition*/
-        //return allocator_mmap(file,vma);
-    }
-}
-
 /* VFS methods */
 static struct file_operations hantrovcmd_fops = {
     .owner= THIS_MODULE,
     .open = hantrovcmd_open,
     .release = hantrovcmd_release,
     .unlocked_ioctl = hantrovcmd_ioctl,
-    .mmap = mmap_mem,
     .fasync = NULL,
 };
 
@@ -4669,17 +4618,3 @@ static void vcmd_reset(void)
     vcmd_reset_asic(hantrovcmd_data);
   }
 }
-
-static bool hantroenc_cmdbuf_range(size_t addr, size_t size)
-{
-    bool bInRange;
-
-    bInRange = (addr >= vcmd_buf_mem_pool.busAddress &&
-                (addr - vcmd_buf_mem_pool.busAddress  + size) <= CMDBUF_POOL_TOTAL_SIZE) ||
-               (addr >= vcmd_status_buf_mem_pool.busAddress &&
-                (addr - vcmd_status_buf_mem_pool.busAddress  + size) <= CMDBUF_POOL_TOTAL_SIZE) ||
-               (addr >= vcmd_registers_mem_pool.busAddress &&
-                (addr - vcmd_status_buf_mem_pool.busAddress + size) <= CMDBUF_VCMD_REGISTER_TOTAL_SIZE);
-
-    return bInRange;
-}