libcamera: camera: Constify controls argument to start()

The ControlList passed to the Camera::start() function isn't modified.
Make it const.

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

2 files changed, 2 insertions, 2 deletions

diff --git a/include/libcamera/camera.h b/include/libcamera/camera.h
index bd81fb54..326b14d0 100644
--- a/include/libcamera/camera.h
+++ b/include/libcamera/camera.h
@@ -100,7 +100,7 @@ public:
 	std::unique_ptr<Request> createRequest(uint64_t cookie = 0);
 	int queueRequest(Request *request);
 
-	int start(ControlList *controls = nullptr);
+	int start(const ControlList *controls = nullptr);
 	int stop();
 
 private:
diff --git a/include/libcamera/internal/pipeline_handler.h b/include/libcamera/internal/pipeline_handler.h
index d455d3c9..6aca0b46 100644
--- a/include/libcamera/internal/pipeline_handler.h
+++ b/include/libcamera/internal/pipeline_handler.h
@@ -76,7 +76,7 @@ public:
 	virtual int exportFrameBuffers(Camera *camera, Stream *stream,
 				       std::vector<std::unique_ptr<FrameBuffer>> *buffers) = 0;
 
-	virtual int start(Camera *camera, ControlList *controls) = 0;
+	virtual int start(Camera *camera, const ControlList *controls) = 0;
 	virtual void stop(Camera *camera) = 0;
 
 	int queueRequest(Request *request);