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path: root/drivers/media/v4l2-core/v4l2-ctrls.c
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Diffstat (limited to 'drivers/media/v4l2-core/v4l2-ctrls.c')
-rw-r--r--drivers/media/v4l2-core/v4l2-ctrls.c138
1 files changed, 130 insertions, 8 deletions
diff --git a/drivers/media/v4l2-core/v4l2-ctrls.c b/drivers/media/v4l2-core/v4l2-ctrls.c
index 89e7bfee108f..6d34d7a6f235 100644
--- a/drivers/media/v4l2-core/v4l2-ctrls.c
+++ b/drivers/media/v4l2-core/v4l2-ctrls.c
@@ -3140,7 +3140,8 @@ static int class_check(struct v4l2_ctrl_handler *hdl, u32 which)
}
/* Get extended controls. Allocates the helpers array if needed. */
-int v4l2_g_ext_ctrls(struct v4l2_ctrl_handler *hdl, struct v4l2_ext_controls *cs)
+static int v4l2_g_ext_ctrls_common(struct v4l2_ctrl_handler *hdl,
+ struct v4l2_ext_controls *cs)
{
struct v4l2_ctrl_helper helper[4];
struct v4l2_ctrl_helper *helpers = helper;
@@ -3220,6 +3221,83 @@ int v4l2_g_ext_ctrls(struct v4l2_ctrl_handler *hdl, struct v4l2_ext_controls *cs
kvfree(helpers);
return ret;
}
+
+static struct media_request_object *
+v4l2_ctrls_find_req_obj(struct v4l2_ctrl_handler *hdl,
+ struct media_request *req, bool set)
+{
+ struct media_request_object *obj;
+ struct v4l2_ctrl_handler *new_hdl;
+ int ret;
+
+ if (IS_ERR(req))
+ return ERR_CAST(req);
+
+ if (set && WARN_ON(req->state != MEDIA_REQUEST_STATE_UPDATING))
+ return ERR_PTR(-EBUSY);
+
+ obj = media_request_object_find(req, &req_ops, hdl);
+ if (obj)
+ return obj;
+ if (!set)
+ return ERR_PTR(-ENOENT);
+
+ new_hdl = kzalloc(sizeof(*new_hdl), GFP_KERNEL);
+ if (!new_hdl)
+ return ERR_PTR(-ENOMEM);
+
+ obj = &new_hdl->req_obj;
+ ret = v4l2_ctrl_handler_init(new_hdl, (hdl->nr_of_buckets - 1) * 8);
+ if (!ret)
+ ret = v4l2_ctrl_request_bind(req, new_hdl, hdl);
+ if (ret) {
+ kfree(new_hdl);
+
+ return ERR_PTR(ret);
+ }
+
+ media_request_object_get(obj);
+ return obj;
+}
+
+int v4l2_g_ext_ctrls(struct v4l2_ctrl_handler *hdl, struct media_device *mdev,
+ struct v4l2_ext_controls *cs)
+{
+ struct media_request_object *obj = NULL;
+ int ret;
+
+ if (cs->which == V4L2_CTRL_WHICH_REQUEST_VAL) {
+ struct media_request *req;
+
+ if (!mdev || cs->request_fd < 0)
+ return -EINVAL;
+
+ req = media_request_get_by_fd(mdev, cs->request_fd);
+ if (IS_ERR(req))
+ return PTR_ERR(req);
+
+ if (req->state != MEDIA_REQUEST_STATE_IDLE &&
+ req->state != MEDIA_REQUEST_STATE_COMPLETE) {
+ media_request_put(req);
+ return -EBUSY;
+ }
+
+ obj = v4l2_ctrls_find_req_obj(hdl, req, false);
+ /* Reference to the request held through obj */
+ media_request_put(req);
+ if (IS_ERR(obj))
+ return PTR_ERR(obj);
+
+ hdl = container_of(obj, struct v4l2_ctrl_handler,
+ req_obj);
+ }
+
+ ret = v4l2_g_ext_ctrls_common(hdl, cs);
+
+ if (obj)
+ media_request_object_put(obj);
+ return ret;
+}
EXPORT_SYMBOL(v4l2_g_ext_ctrls);
/* Helper function to get a single control */
@@ -3408,9 +3486,9 @@ static void update_from_auto_cluster(struct v4l2_ctrl *master)
}
/* Try or try-and-set controls */
-static int try_set_ext_ctrls(struct v4l2_fh *fh, struct v4l2_ctrl_handler *hdl,
- struct v4l2_ext_controls *cs,
- bool set)
+static int try_set_ext_ctrls_common(struct v4l2_fh *fh,
+ struct v4l2_ctrl_handler *hdl,
+ struct v4l2_ext_controls *cs, bool set)
{
struct v4l2_ctrl_helper helper[4];
struct v4l2_ctrl_helper *helpers = helper;
@@ -3523,16 +3601,60 @@ static int try_set_ext_ctrls(struct v4l2_fh *fh, struct v4l2_ctrl_handler *hdl,
return ret;
}
-int v4l2_try_ext_ctrls(struct v4l2_ctrl_handler *hdl, struct v4l2_ext_controls *cs)
+static int try_set_ext_ctrls(struct v4l2_fh *fh,
+ struct v4l2_ctrl_handler *hdl, struct media_device *mdev,
+ struct v4l2_ext_controls *cs, bool set)
+{
+ struct media_request_object *obj = NULL;
+ struct media_request *req = NULL;
+ int ret;
+
+ if (cs->which == V4L2_CTRL_WHICH_REQUEST_VAL) {
+ if (!mdev || cs->request_fd < 0)
+ return -EINVAL;
+
+ req = media_request_get_by_fd(mdev, cs->request_fd);
+ if (IS_ERR(req))
+ return PTR_ERR(req);
+
+ ret = media_request_lock_for_update(req);
+ if (ret) {
+ media_request_put(req);
+ return ret;
+ }
+
+ obj = v4l2_ctrls_find_req_obj(hdl, req, set);
+ /* Reference to the request held through obj */
+ media_request_put(req);
+ if (IS_ERR(obj)) {
+ media_request_unlock_for_update(req);
+ return PTR_ERR(obj);
+ }
+ hdl = container_of(obj, struct v4l2_ctrl_handler,
+ req_obj);
+ }
+
+ ret = try_set_ext_ctrls_common(fh, hdl, cs, set);
+
+ if (obj) {
+ media_request_unlock_for_update(obj->req);
+ media_request_object_put(obj);
+ }
+
+ return ret;
+}
+
+int v4l2_try_ext_ctrls(struct v4l2_ctrl_handler *hdl, struct media_device *mdev,
+ struct v4l2_ext_controls *cs)
{
- return try_set_ext_ctrls(NULL, hdl, cs, false);
+ return try_set_ext_ctrls(NULL, hdl, mdev, cs, false);
}
EXPORT_SYMBOL(v4l2_try_ext_ctrls);
int v4l2_s_ext_ctrls(struct v4l2_fh *fh, struct v4l2_ctrl_handler *hdl,
- struct v4l2_ext_controls *cs)
+ struct media_device *mdev, struct v4l2_ext_controls *cs)
{
- return try_set_ext_ctrls(fh, hdl, cs, true);
+ return try_set_ext_ctrls(fh, hdl, mdev, cs, true);
}
EXPORT_SYMBOL(v4l2_s_ext_ctrls);