diff options
| author | Ricardo Ribalda <ribalda@chromium.org> | 2025-02-23 18:58:04 +0000 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab+huawei@kernel.org> | 2025-03-05 10:43:24 +0100 |
| commit | 46108b41aeb5ac36da3ab613f9ab1b355f196a88 (patch) | |
| tree | 8c9b2ad4f9c250995e508a01500c3ae816eeafb4 /drivers/media/v4l2-core/v4l2-ioctl.c | |
| parent | a79efc44b51432490538a55b9753a721f7d3ea42 (diff) | |
media: ioctl: Simulate v4l2_queryctrl with v4l2_query_ext_ctrl
v4l2_queryctrl is a subset of v4l2_query_ext_ctrl. If the driver does
not implement v4l2_queryctrl we can implement it with
v4l2_query_ext_ctrl.
Suggested-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Ricardo Ribalda <ribalda@chromium.org>
Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Diffstat (limited to 'drivers/media/v4l2-core/v4l2-ioctl.c')
| -rw-r--r-- | drivers/media/v4l2-core/v4l2-ioctl.c | 37 |
1 files changed, 36 insertions, 1 deletions
diff --git a/drivers/media/v4l2-core/v4l2-ioctl.c b/drivers/media/v4l2-core/v4l2-ioctl.c index bfdba96e938c..84bb36813cf2 100644 --- a/drivers/media/v4l2-core/v4l2-ioctl.c +++ b/drivers/media/v4l2-core/v4l2-ioctl.c @@ -2286,9 +2286,11 @@ static int v4l_queryctrl(const struct v4l2_ioctl_ops *ops, struct file *file, void *fh, void *arg) { struct video_device *vfd = video_devdata(file); + struct v4l2_query_ext_ctrl qec = {}; struct v4l2_queryctrl *p = arg; struct v4l2_fh *vfh = test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; + int ret; if (vfh && vfh->ctrl_handler) return v4l2_queryctrl(vfh->ctrl_handler, p); @@ -2296,7 +2298,40 @@ static int v4l_queryctrl(const struct v4l2_ioctl_ops *ops, return v4l2_queryctrl(vfd->ctrl_handler, p); if (ops->vidioc_queryctrl) return ops->vidioc_queryctrl(file, fh, p); - return -ENOTTY; + if (!ops->vidioc_query_ext_ctrl) + return -ENOTTY; + + /* Simulate query_ext_ctr using query_ctrl. */ + qec.id = p->id; + ret = ops->vidioc_query_ext_ctrl(file, fh, &qec); + if (ret) + return ret; + + p->id = qec.id; + p->type = qec.type; + p->flags = qec.flags; + strscpy(p->name, qec.name, sizeof(p->name)); + switch (p->type) { + case V4L2_CTRL_TYPE_INTEGER: + case V4L2_CTRL_TYPE_BOOLEAN: + case V4L2_CTRL_TYPE_MENU: + case V4L2_CTRL_TYPE_INTEGER_MENU: + case V4L2_CTRL_TYPE_STRING: + case V4L2_CTRL_TYPE_BITMASK: + p->minimum = qec.minimum; + p->maximum = qec.maximum; + p->step = qec.step; + p->default_value = qec.default_value; + break; + default: + p->minimum = 0; + p->maximum = 0; + p->step = 0; + p->default_value = 0; + break; + } + + return 0; } static int v4l_query_ext_ctrl(const struct v4l2_ioctl_ops *ops, |