media: v4l2-ctrls: add __v4l2_ctrl_s_ctrl_compound()

Rather than creating new compound control helpers for each new
type, create one generic function and just create defines on
top.
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Tested-by: Paul Kocialkowski <paul.kocialkowski@bootlin.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

drivers/media/v4l2-core/v4l2-ctrls.c

@@ -4253,18 +4253,18 @@ int __v4l2_ctrl_s_ctrl_string(struct v4l2_ctrl *ctrl, const char *s)
 }
 EXPORT_SYMBOL(__v4l2_ctrl_s_ctrl_string);
 
-int __v4l2_ctrl_s_ctrl_area(struct v4l2_ctrl *ctrl,
-			    const struct v4l2_area *area)
+int __v4l2_ctrl_s_ctrl_compound(struct v4l2_ctrl *ctrl,
+				enum v4l2_ctrl_type type, const void *p)
 {
 	lockdep_assert_held(ctrl->handler->lock);
 
 	/* It's a driver bug if this happens. */
-	if (WARN_ON(ctrl->type != V4L2_CTRL_TYPE_AREA))
+	if (WARN_ON(ctrl->type != type))
 		return -EINVAL;
-	*ctrl->p_new.p_area = *area;
+	memcpy(ctrl->p_new.p, p, ctrl->elems * ctrl->elem_size);
 	return set_ctrl(NULL, ctrl, 0);
 }
-EXPORT_SYMBOL(__v4l2_ctrl_s_ctrl_area);
+EXPORT_SYMBOL(__v4l2_ctrl_s_ctrl_compound);
 
 void v4l2_ctrl_request_complete(struct media_request *req,
 				struct v4l2_ctrl_handler *main_hdl)

include/media/v4l2-ctrls.h

@@ -1113,45 +1113,54 @@ static inline int v4l2_ctrl_s_ctrl_string(struct v4l2_ctrl *ctrl, const char *s)
 }
 
 /**
- * __v4l2_ctrl_s_ctrl_area() - Unlocked variant of v4l2_ctrl_s_ctrl_area().
+ * __v4l2_ctrl_s_ctrl_compound() - Unlocked variant to set a compound control
  *
  * @ctrl: The control.
- * @area:	The new area.
+ * @type: The type of the data.
+ * @p:    The new compound payload.
  *
- * This sets the control's new area safely by going through the control
- * framework. This function assumes the control's handler is already locked,
- * allowing it to be used from within the &v4l2_ctrl_ops functions.
+ * This sets the control's new compound payload safely by going through the
+ * control framework. This function assumes the control's handler is already
+ * locked, allowing it to be used from within the &v4l2_ctrl_ops functions.
  *
- * This function is for area type controls only.
+ * This function is for compound type controls only.
  */
-int __v4l2_ctrl_s_ctrl_area(struct v4l2_ctrl *ctrl,
-			    const struct v4l2_area *area);
+int __v4l2_ctrl_s_ctrl_compound(struct v4l2_ctrl *ctrl,
+				enum v4l2_ctrl_type type, const void *p);
 
 /**
- * v4l2_ctrl_s_ctrl_area() - Helper function to set a control's area value
+ * v4l2_ctrl_s_ctrl_compound() - Helper function to set a compound control
  *	from within a driver.
  *
  * @ctrl: The control.
- * @area:	The new area.
+ * @type: The type of the data.
+ * @p:    The new compound payload.
  *
- * This sets the control's new area safely by going through the control
- * framework. This function will lock the control's handler, so it cannot be
- * used from within the &v4l2_ctrl_ops functions.
+ * This sets the control's new compound payload safely by going through the
+ * control framework. This function will lock the control's handler, so it
+ * cannot be used from within the &v4l2_ctrl_ops functions.
  *
- * This function is for area type controls only.
+ * This function is for compound type controls only.
  */
-static inline int v4l2_ctrl_s_ctrl_area(struct v4l2_ctrl *ctrl,
-					const struct v4l2_area *area)
+static inline int v4l2_ctrl_s_ctrl_compound(struct v4l2_ctrl *ctrl,
+					    enum v4l2_ctrl_type type,
+					    const void *p)
 {
 	int rval;
 
 	v4l2_ctrl_lock(ctrl);
-	rval = __v4l2_ctrl_s_ctrl_area(ctrl, area);
+	rval = __v4l2_ctrl_s_ctrl_compound(ctrl, type, p);
 	v4l2_ctrl_unlock(ctrl);
 
 	return rval;
 }
 
+/* Helper defines for area type controls */
+#define __v4l2_ctrl_s_ctrl_area(ctrl, area) \
+	__v4l2_ctrl_s_ctrl_compound((ctrl), V4L2_CTRL_TYPE_AREA, (area))
+#define v4l2_ctrl_s_ctrl_area(ctrl, area) \
+	v4l2_ctrl_s_ctrl_compound((ctrl), V4L2_CTRL_TYPE_AREA, (area))
+
 /* Internal helper functions that deal with control events. */
 extern const struct v4l2_subscribed_event_ops v4l2_ctrl_sub_ev_ops;