diff --git a/drivers/media/v4l2-core/videobuf2-core.c b/drivers/media/v4l2-core/videobuf2-core.c
index 21900202..22d6105 100644
--- a/drivers/media/v4l2-core/videobuf2-core.c
+++ b/drivers/media/v4l2-core/videobuf2-core.c
@@ -194,8 +194,7 @@ static void __enqueue_in_driver(struct vb2_buffer *vb);
 static int __vb2_buf_mem_alloc(struct vb2_buffer *vb)
 {
 	struct vb2_queue *q = vb->vb2_queue;
-	enum dma_data_direction dma_dir =
-		q->is_output ? DMA_TO_DEVICE : DMA_FROM_DEVICE;
+	enum dma_data_direction dma_dir = VB2_DMA_DIR(q);
 	void *mem_priv;
 	int plane;
 	int ret = -ENOMEM;
@@ -978,8 +977,7 @@ static int __qbuf_userptr(struct vb2_buffer *vb, const void *pb)
 	void *mem_priv;
 	unsigned int plane;
 	int ret = 0;
-	enum dma_data_direction dma_dir =
-		q->is_output ? DMA_TO_DEVICE : DMA_FROM_DEVICE;
+	enum dma_data_direction dma_dir = VB2_DMA_DIR(q);
 	bool reacquired = vb->planes[0].mem_priv == NULL;
 
 	memset(planes, 0, sizeof(planes[0]) * vb->num_planes);
@@ -1096,8 +1094,7 @@ static int __qbuf_dmabuf(struct vb2_buffer *vb, const void *pb)
 	void *mem_priv;
 	unsigned int plane;
 	int ret = 0;
-	enum dma_data_direction dma_dir =
-		q->is_output ? DMA_TO_DEVICE : DMA_FROM_DEVICE;
+	enum dma_data_direction dma_dir = VB2_DMA_DIR(q);
 	bool reacquired = vb->planes[0].mem_priv == NULL;
 
 	memset(planes, 0, sizeof(planes[0]) * vb->num_planes);
diff --git a/drivers/media/v4l2-core/videobuf2-dma-contig.c b/drivers/media/v4l2-core/videobuf2-dma-contig.c
index fb6a177..a44e383 100644
--- a/drivers/media/v4l2-core/videobuf2-dma-contig.c
+++ b/drivers/media/v4l2-core/videobuf2-dma-contig.c
@@ -507,7 +507,7 @@ static void *vb2_dc_get_userptr(struct device *dev, unsigned long vaddr,
 	buf->dma_dir = dma_dir;
 
 	offset = vaddr & ~PAGE_MASK;
-	vec = vb2_create_framevec(vaddr, size, dma_dir == DMA_FROM_DEVICE);
+	vec = vb2_create_framevec(vaddr, size, VB2_DMA_DIR_CAPTURE(dma_dir));
 	if (IS_ERR(vec)) {
 		ret = PTR_ERR(vec);
 		goto fail_buf;
diff --git a/drivers/media/v4l2-core/videobuf2-dma-sg.c b/drivers/media/v4l2-core/videobuf2-dma-sg.c
index ecff8f49..51c98f6 100644
--- a/drivers/media/v4l2-core/videobuf2-dma-sg.c
+++ b/drivers/media/v4l2-core/videobuf2-dma-sg.c
@@ -238,7 +238,8 @@ static void *vb2_dma_sg_get_userptr(struct device *dev, unsigned long vaddr,
 	buf->offset = vaddr & ~PAGE_MASK;
 	buf->size = size;
 	buf->dma_sgt = &buf->sg_table;
-	vec = vb2_create_framevec(vaddr, size, buf->dma_dir == DMA_FROM_DEVICE);
+	vec = vb2_create_framevec(vaddr, size,
+				  VB2_DMA_DIR_CAPTURE(buf->dma_dir));
 	if (IS_ERR(vec))
 		goto userptr_fail_pfnvec;
 	buf->vec = vec;
@@ -291,7 +292,7 @@ static void vb2_dma_sg_put_userptr(void *buf_priv)
 		vm_unmap_ram(buf->vaddr, buf->num_pages);
 	sg_free_table(buf->dma_sgt);
 	while (--i >= 0) {
-		if (buf->dma_dir == DMA_FROM_DEVICE)
+		if (VB2_DMA_DIR_CAPTURE(buf->dma_dir))
 			set_page_dirty_lock(buf->pages[i]);
 	}
 	vb2_destroy_framevec(buf->vec);
diff --git a/drivers/media/v4l2-core/videobuf2-vmalloc.c b/drivers/media/v4l2-core/videobuf2-vmalloc.c
index ab3227b..76649bd 100644
--- a/drivers/media/v4l2-core/videobuf2-vmalloc.c
+++ b/drivers/media/v4l2-core/videobuf2-vmalloc.c
@@ -86,7 +86,7 @@ static void *vb2_vmalloc_get_userptr(struct device *dev, unsigned long vaddr,
 	buf->dma_dir = dma_dir;
 	offset = vaddr & ~PAGE_MASK;
 	buf->size = size;
-	vec = vb2_create_framevec(vaddr, size, dma_dir == DMA_FROM_DEVICE);
+	vec = vb2_create_framevec(vaddr, size, VB2_DMA_DIR_CAPTURE(dma_dir));
 	if (IS_ERR(vec)) {
 		ret = PTR_ERR(vec);
 		goto fail_pfnvec_create;
@@ -136,7 +136,7 @@ static void vb2_vmalloc_put_userptr(void *buf_priv)
 		pages = frame_vector_pages(buf->vec);
 		if (vaddr)
 			vm_unmap_ram((void *)vaddr, n_pages);
-		if (buf->dma_dir == DMA_FROM_DEVICE)
+		if (VB2_DMA_DIR_CAPTURE(buf->dma_dir))
 			for (i = 0; i < n_pages; i++)
 				set_page_dirty_lock(pages[i]);
 	} else {
diff --git a/include/media/videobuf2-core.h b/include/media/videobuf2-core.h
index ac5898a..11d2e51 100644
--- a/include/media/videobuf2-core.h
+++ b/include/media/videobuf2-core.h
@@ -433,6 +433,9 @@ struct vb2_buf_ops {
  * @quirk_poll_must_check_waiting_for_buffers: Return POLLERR at poll when QBUF
  *              has not been called. This is a vb1 idiom that has been adopted
  *              also by vb2.
+ * @capture_dma_bidirectional:	use DMA_BIDIRECTIONAL for CAPTURE buffers; this
+ *				allows HW to read from the CAPTURE buffers in
+ *				addition to writing; ignored for OUTPUT queues.
  * @lock:	pointer to a mutex that protects the vb2_queue struct. The
  *		driver can set this to a mutex to let the v4l2 core serialize
  *		the queuing ioctls. If the driver wants to handle locking
@@ -499,6 +502,7 @@ struct vb2_queue {
 	unsigned			fileio_write_immediately:1;
 	unsigned			allow_zero_bytesused:1;
 	unsigned		   quirk_poll_must_check_waiting_for_buffers:1;
+	unsigned			capture_dma_bidirectional:1;
 
 	struct mutex			*lock;
 	void				*owner;
@@ -554,6 +558,25 @@ struct vb2_queue {
 #endif
 };
 
+/*
+ * Returns the corresponding DMA direction given the vb2_queue type (capture or
+ * output). Returns DMA_BIDIRECTIONAL for capture buffers if the vb2_queue field
+ * capture_dma_bidirectional is set by the driver.
+ */
+#define VB2_DMA_DIR(q) ((q)->is_output ? DMA_TO_DEVICE                  \
+				       : (q)->capture_dma_bidirectional \
+					 ? DMA_BIDIRECTIONAL            \
+					 : DMA_FROM_DEVICE)
+
+/*
+ * Returns true if the DMA direction passed as parameter refers to a capture
+ * buffer as capture buffers allow both FROM_DEVICE and BIDIRECTIONAL DMA
+ * direction. This test is used to map virtual addresses for writing and to mark
+ * pages as dirty.
+ */
+#define VB2_DMA_DIR_CAPTURE(d) \
+			((d) == DMA_FROM_DEVICE || (d) == DMA_BIDIRECTIONAL)
+
 /**
  * vb2_plane_vaddr() - Return a kernel virtual address of a given plane
  * @vb:		vb2_buffer to which the plane in question belongs to
