target/linux/bcm27xx/patches-5.4/950-0658-media-bcm2835-unicam-Disable-event-related-ioctls-on.patch

   1 From e8f2c38720e391ce44154f17f3602484c1827a59 Mon Sep 17 00:00:00 2001
   2 From: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
   3 Date: Tue, 24 Mar 2020 23:13:02 +0200
   4 Subject: [PATCH] media: bcm2835-unicam: Disable event-related ioctls
   5  on metadata node
   6
   7 The unicam driver supports both the SOURCE_CHANGE and CTRL events. Both
   8 events are only generated on the image video node, so the event-related
   9 ioctls are useless on the medatada node. Disable them.
  10
  11 Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
  12 Reviewed-by: Jacopo Mondi <jacopo@jmondi.org>
  13 Reviewed-by: Naushir Patuck <naush@raspberrypi.com>
  14 ---
  15  drivers/media/platform/bcm2835/bcm2835-unicam.c | 5 +++++
  16  1 file changed, 5 insertions(+)
  17
  18 --- a/drivers/media/platform/bcm2835/bcm2835-unicam.c
  19 +++ b/drivers/media/platform/bcm2835/bcm2835-unicam.c
  20 @@ -2374,6 +2374,11 @@ static int register_node(struct unicam_d
  21                 return -ENOMEM;
  22         }
  23
  24 +       if (node->pad_id == METADATA_PAD) {
  25 +               v4l2_disable_ioctl(vdev, VIDIOC_DQEVENT);
  26 +               v4l2_disable_ioctl(vdev, VIDIOC_SUBSCRIBE_EVENT);
  27 +               v4l2_disable_ioctl(vdev, VIDIOC_UNSUBSCRIBE_EVENT);
  28 +       }
  29         if (node->pad_id == METADATA_PAD ||
  30             !v4l2_subdev_has_op(unicam->sensor, video, s_std)) {
  31                 v4l2_disable_ioctl(&node->video_dev, VIDIOC_S_STD);