[media] media: v4l2-ctrl: add a helper function to add standard control with driver specific menu

Add helper function v4l2_ctrl_new_std_menu_items(), which adds
a standard menu control, with driver specific menu.

Signed-off-by: Lad, Prabhakar <prabhakar.lad@ti.com>
Signed-off-by: Manjunath Hadli <manjunath.hadli@ti.com>
Acked-by: Hans Verkuil <hans.verkuil@cisco.com>
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

1 files changed, 30 insertions, 0 deletions

diff --git a/drivers/media/v4l2-core/v4l2-ctrls.c b/drivers/media/v4l2-core/v4l2-ctrls.c
index 0bcef2b52cb1..207bcd8dee11 100644
--- a/drivers/media/v4l2-core/v4l2-ctrls.c
+++ b/drivers/media/v4l2-core/v4l2-ctrls.c
@@ -1650,6 +1650,36 @@ struct v4l2_ctrl *v4l2_ctrl_new_std_menu(struct v4l2_ctrl_handler *hdl,
 }
 EXPORT_SYMBOL(v4l2_ctrl_new_std_menu);
 
+/* Helper function for standard menu controls with driver defined menu */
+struct v4l2_ctrl *v4l2_ctrl_new_std_menu_items(struct v4l2_ctrl_handler *hdl,
+                        const struct v4l2_ctrl_ops *ops, u32 id, s32 max,
+                        s32 mask, s32 def, const char * const *qmenu)
+{
+        enum v4l2_ctrl_type type;
+        const char *name;
+        u32 flags;
+        s32 step;
+        s32 min;
+
+        /* v4l2_ctrl_new_std_menu_items() should only be called for
+         * standard controls without a standard menu.
+         */
+        if (v4l2_ctrl_get_menu(id)) {
+                handler_set_err(hdl, -EINVAL);
+                return NULL;
+        }
+
+        v4l2_ctrl_fill(id, &name, &type, &min, &max, &step, &def, &flags);
+        if (type != V4L2_CTRL_TYPE_MENU || qmenu == NULL) {
+                handler_set_err(hdl, -EINVAL);
+                return NULL;
+        }
+        return v4l2_ctrl_new(hdl, ops, id, name, type, 0, max, mask, def,
+                             flags, qmenu, NULL, NULL);
+
+}
+EXPORT_SYMBOL(v4l2_ctrl_new_std_menu_items);
+
 /* Helper function for standard integer menu controls */
 struct v4l2_ctrl *v4l2_ctrl_new_int_menu(struct v4l2_ctrl_handler *hdl,
                         const struct v4l2_ctrl_ops *ops,