diff --git a/drivers/staging/media/atomisp/include/hmm/hmm.h b/drivers/staging/media/atomisp/include/hmm/hmm.h
index 37366e333744df3b1f2bf5ede6b23a7a0c68e81c..99bf7d01f9ef97b6e7d255c47f82ecc797dabd1c 100644
--- a/drivers/staging/media/atomisp/include/hmm/hmm.h
+++ b/drivers/staging/media/atomisp/include/hmm/hmm.h
@@ -66,17 +66,6 @@ void hmm_vunmap(ia_css_ptr virt);
  */
 void hmm_flush_vmap(ia_css_ptr virt);
 
-/*
- * Address translation from ISP shared memory address to kernel virtual address
- * if the memory is not vmmaped,  then do it.
- */
-void *hmm_isp_vaddr_to_host_vaddr(ia_css_ptr ptr, bool cached);
-
-/*
- * Address translation from kernel virtual address to ISP shared memory address
- */
-ia_css_ptr hmm_host_vaddr_to_hrt_vaddr(const void *ptr);
-
 /*
  * map ISP memory starts with virt to specific vma.
  *
diff --git a/drivers/staging/media/atomisp/pci/hmm/hmm.c b/drivers/staging/media/atomisp/pci/hmm/hmm.c
index 82b46aaca00f5ec80ad15069939387ddbd3f0848..bbb5f8775e9567c6dac74304a4664c81cf4c4191 100644
--- a/drivers/staging/media/atomisp/pci/hmm/hmm.c
+++ b/drivers/staging/media/atomisp/pci/hmm/hmm.c
@@ -608,23 +608,3 @@ void hmm_vunmap(ia_css_ptr virt)
 
 	hmm_bo_vunmap(bo);
 }
-
-void *hmm_isp_vaddr_to_host_vaddr(ia_css_ptr ptr, bool cached)
-{
-	return hmm_vmap(ptr, cached);
-	/* vmunmap will be done in hmm_bo_release() */
-}
-
-ia_css_ptr hmm_host_vaddr_to_hrt_vaddr(const void *ptr)
-{
-	struct hmm_buffer_object *bo;
-
-	bo = hmm_bo_device_search_vmap_start(&bo_device, ptr);
-	if (bo)
-		return bo->start;
-
-	dev_err(atomisp_dev,
-		"can not find buffer object whose kernel virtual address is %p\n",
-		ptr);
-	return 0;
-}