libcamera: controls: Remove the unused ControlList::update() method

The ControlList::update() method is unused. While it is meant to fulfil
a need of applications, having no user means that it is most probably
not correctly designed. Remove the method, we will add it back later if
needed.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Jacopo Mondi <jacopo@jmondi.org>
Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>

3 files changed, 0 insertions, 73 deletions

diff --git a/include/libcamera/controls.h b/include/libcamera/controls.h
index 9698bd1d..d4a74ada 100644
--- a/include/libcamera/controls.h
+++ b/include/libcamera/controls.h
@@ -158,8 +158,6 @@ public:
 		val->set<T>(value);
 	}
 
-	void update(const ControlList &list);
-
 private:
 	const ControlValue *find(const ControlId &id) const;
 	ControlValue *find(const ControlId &id);
diff --git a/src/libcamera/controls.cpp b/src/libcamera/controls.cpp
index a34af588..5e8b3a9b 100644
--- a/src/libcamera/controls.cpp
+++ b/src/libcamera/controls.cpp
@@ -512,32 +512,4 @@ ControlValue *ControlList::find(const ControlId &id)
 	return &controls_[&id];
 }
 
-/**
- * \brief Update the list with a union of itself and \a other
- * \param other The other list
- *
- * Update the control list to include all values from the \a other list.
- * Elements in the list whose control IDs are contained in \a other are updated
- * with the value from \a other. Elements in the \a other list that have no
- * corresponding element in the list are added to the list with their value.
- *
- * The behaviour is undefined if the two lists refer to different Camera
- * instances.
- */
-void ControlList::update(const ControlList &other)
-{
-	if (other.camera_ != camera_) {
-		LOG(Controls, Error)
-			<< "Can't update ControlList from a different camera";
-		return;
-	}
-
-	for (auto it : other) {
-		const ControlId *id = it.first;
-		const ControlValue &value = it.second;
-
-		controls_[id] = value;
-	}
-}
-
 } /* namespace libcamera */
diff --git a/test/controls/control_list.cpp b/test/controls/control_list.cpp
index 05369681..8469ecf0 100644
--- a/test/controls/control_list.cpp
+++ b/test/controls/control_list.cpp
@@ -141,49 +141,6 @@ protected:
 			return TestFail;
 		}
 
-		/*
-		 * Test list merging. Create a new list, add two controls with
-		 * one overlapping the existing list, merge the lists and clear
-		 * the old list. Verify that the new list is empty and that the
-		 * new list contains the expected items and values.
-		 */
-		ControlList newList(camera_.get());
-
-		newList.set(controls::Brightness, 128);
-		newList.set(controls::Saturation, 255);
-		newList.update(list);
-
-		list.clear();
-
-		if (list.size() != 0) {
-			cout << "Old List should contain zero items" << endl;
-			return TestFail;
-		}
-
-		if (!list.empty()) {
-			cout << "Old List should be empty" << endl;
-			return TestFail;
-		}
-
-		if (newList.size() != 3) {
-			cout << "New list has incorrect size" << endl;
-			return TestFail;
-		}
-
-		if (!newList.contains(controls::Brightness) ||
-		    !newList.contains(controls::Contrast) ||
-		    !newList.contains(controls::Saturation)) {
-			cout << "New list contains incorrect items" << endl;
-			return TestFail;
-		}
-
-		if (newList.get(controls::Brightness) != 10 ||
-		    newList.get(controls::Contrast) != 20 ||
-		    newList.get(controls::Saturation) != 255) {
-			cout << "New list contains incorrect values" << endl;
-			return TestFail;
-		}
-
 		return TestPass;
 	}