media: atomisp: Add DMABUF support

Add DMABUF support and while at it drop userptr support.

Now that atomisp has been ported to videobuf2 this is trivial.
Reviewed-by: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>

drivers/staging/media/atomisp/pci/atomisp_ioctl.c

@@ -1666,6 +1666,7 @@ const struct v4l2_ioctl_ops atomisp_ioctl_ops = {
 	.vidioc_querybuf = vb2_ioctl_querybuf,
 	.vidioc_qbuf = atomisp_qbuf_wrapper,
 	.vidioc_dqbuf = atomisp_dqbuf_wrapper,
+	.vidioc_expbuf = vb2_ioctl_expbuf,
 	.vidioc_streamon = vb2_ioctl_streamon,
 	.vidioc_streamoff = vb2_ioctl_streamoff,
 	.vidioc_default = atomisp_vidioc_default,

drivers/staging/media/atomisp/pci/atomisp_subdev.c

@@ -765,7 +765,7 @@ static int atomisp_init_subdev_pipe(struct atomisp_sub_device *asd,
 
 	/* Init videobuf2 queue structure */
 	pipe->vb_queue.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
-	pipe->vb_queue.io_modes = VB2_MMAP | VB2_USERPTR;
+	pipe->vb_queue.io_modes = VB2_MMAP | VB2_DMABUF;
 	pipe->vb_queue.buf_struct_size = sizeof(struct ia_css_frame);
 	pipe->vb_queue.ops = &atomisp_vb2_ops;
 	pipe->vb_queue.mem_ops = &vb2_vmalloc_memops;