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media: v4l: ctrls: Add debug messages

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Currently, the v4l2 control code is a bit silent on errors.
Add debug messages on (hopefully) most of the error paths.

Signed-off-by: Ezequiel Garcia <ezequiel@collabora.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
This commit is contained in:
Ezequiel Garcia
2019-07-20 07:47:07 -04:00
committed by Mauro Carvalho Chehab
parent d4a6a9537b
commit 173f6eacc8
7 changed files with 127 additions and 39 deletions
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6
drivers/media/v4l2-core/v4l2-subdev.c
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@@ -372,19 +372,19 @@ static long subdev_do_ioctl(struct file *file, unsigned int cmd, void *arg)
if (!vfh->ctrl_handler)
return -ENOTTY;
return v4l2_g_ext_ctrls(vfh->ctrl_handler,
sd->v4l2_dev->mdev, arg);
vdev, sd->v4l2_dev->mdev, arg);
case VIDIOC_S_EXT_CTRLS:
if (!vfh->ctrl_handler)
return -ENOTTY;
return v4l2_s_ext_ctrls(vfh, vfh->ctrl_handler,
sd->v4l2_dev->mdev, arg);
vdev, sd->v4l2_dev->mdev, arg);
case VIDIOC_TRY_EXT_CTRLS:
if (!vfh->ctrl_handler)
return -ENOTTY;
return v4l2_try_ext_ctrls(vfh->ctrl_handler,
sd->v4l2_dev->mdev, arg);
vdev, sd->v4l2_dev->mdev, arg);
case VIDIOC_DQEVENT:
if (!(sd->flags & V4L2_SUBDEV_FL_HAS_EVENTS))