[media] v4l: Tell user space we're using monotonic timestamps

Set buffer timestamp flags for videobuf, videobuf2 and drivers that use
neither.

Signed-off-by: Sakari Ailus <sakari.ailus@iki.fi>
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Acked-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

1 files changed, 3 insertions, 2 deletions

diff --git a/drivers/media/usb/usbvision/usbvision-video.c b/drivers/media/usb/usbvision/usbvision-video.c
index 5c36a57e6590..c6bc8ce67375 100644
--- a/drivers/media/usb/usbvision/usbvision-video.c
+++ b/drivers/media/usb/usbvision/usbvision-video.c
@@ -761,7 +761,7 @@ static int vidioc_querybuf(struct file *file,
         if (vb->index >= usbvision->num_frames)
                 return -EINVAL;
         /* Updating the corresponding frame state */
-        vb->flags = 0;
+        vb->flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
         frame = &usbvision->frame[vb->index];
         if (frame->grabstate >= frame_state_ready)
                 vb->flags |= V4L2_BUF_FLAG_QUEUED;
@@ -843,7 +843,8 @@ static int vidioc_dqbuf(struct file *file, void *priv, struct v4l2_buffer *vb)
         vb->memory = V4L2_MEMORY_MMAP;
         vb->flags = V4L2_BUF_FLAG_MAPPED |
                 V4L2_BUF_FLAG_QUEUED |
-                V4L2_BUF_FLAG_DONE;
+                V4L2_BUF_FLAG_DONE |
+                V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
         vb->index = f->index;
         vb->sequence = f->sequence;
         vb->timestamp = f->timestamp;