diff options
| author | Hans Verkuil <hverkuil@xs4all.nl> | 2018-07-10 04:00:53 -0400 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab+samsung@kernel.org> | 2018-08-31 11:13:09 -0400 |
| commit | 5f611d74c2bd89296aa045609df0e5309ff7ab41 (patch) | |
| tree | a0cbd5fb28148dff19e8616a7c7e3d8ce79ab373 /drivers | |
| parent | c41e9cff704a06b8cbd9eeea0fdec54fb6d13825 (diff) | |
media: v4l2-ctrls: add v4l2_ctrl_request_hdl_find/put/ctrl_find functions
If a driver needs to find/inspect the controls set in a request then
it can use these functions.
E.g. to check if a required control is set in a request use this in the
req_validate() implementation:
int res = -EINVAL;
hdl = v4l2_ctrl_request_hdl_find(req, parent_hdl);
if (hdl) {
if (v4l2_ctrl_request_hdl_ctrl_find(hdl, ctrl_id))
res = 0;
v4l2_ctrl_request_hdl_put(hdl);
}
return res;
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Reviewed-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/media/v4l2-core/v4l2-ctrls.c | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/drivers/media/v4l2-core/v4l2-ctrls.c b/drivers/media/v4l2-core/v4l2-ctrls.c index 6d34d7a6f235..a197b60183f5 100644 --- a/drivers/media/v4l2-core/v4l2-ctrls.c +++ b/drivers/media/v4l2-core/v4l2-ctrls.c @@ -2976,6 +2976,31 @@ static const struct media_request_object_ops req_ops = { .release = v4l2_ctrl_request_release, }; +struct v4l2_ctrl_handler *v4l2_ctrl_request_hdl_find(struct media_request *req, + struct v4l2_ctrl_handler *parent) +{ + struct media_request_object *obj; + + if (WARN_ON(req->state != MEDIA_REQUEST_STATE_VALIDATING && + req->state != MEDIA_REQUEST_STATE_QUEUED)) + return NULL; + + obj = media_request_object_find(req, &req_ops, parent); + if (obj) + return container_of(obj, struct v4l2_ctrl_handler, req_obj); + return NULL; +} +EXPORT_SYMBOL_GPL(v4l2_ctrl_request_hdl_find); + +struct v4l2_ctrl * +v4l2_ctrl_request_hdl_ctrl_find(struct v4l2_ctrl_handler *hdl, u32 id) +{ + struct v4l2_ctrl_ref *ref = find_ref_lock(hdl, id); + + return (ref && ref->req == ref) ? ref->ctrl : NULL; +} +EXPORT_SYMBOL_GPL(v4l2_ctrl_request_hdl_ctrl_find); + static int v4l2_ctrl_request_bind(struct media_request *req, struct v4l2_ctrl_handler *hdl, struct v4l2_ctrl_handler *from) |