diff --git a/include/libcamera/ipa/rkisp1.mojom b/include/libcamera/ipa/rkisp1.mojom
index 068e898848c4..4c29b53cd7f9 100644
--- a/include/libcamera/ipa/rkisp1.mojom
+++ b/include/libcamera/ipa/rkisp1.mojom
@@ -14,13 +14,18 @@ struct IPAConfigInfo {
 	uint32 paramFormat;
 };
 
+struct StartResult {
+	libcamera.ControlList controls;
+	int32 code;
+};
+
 interface IPARkISP1Interface {
 	init(libcamera.IPASettings settings,
 	     uint32 hwRevision, uint32 supportedBlocks,
 	     libcamera.IPACameraSensorInfo sensorInfo,
 	     libcamera.ControlInfoMap sensorControls)
 		=> (int32 ret, libcamera.ControlInfoMap ipaControls);
-	start() => (int32 ret);
+	start(libcamera.ControlList controls) => (StartResult result);
 	stop();
 
 	configure(IPAConfigInfo configInfo,
diff --git a/src/ipa/rkisp1/rkisp1.cpp b/src/ipa/rkisp1/rkisp1.cpp
index a55bac260026..7a7b7682e242 100644
--- a/src/ipa/rkisp1/rkisp1.cpp
+++ b/src/ipa/rkisp1/rkisp1.cpp
@@ -56,7 +56,7 @@ public:
 		 const IPACameraSensorInfo &sensorInfo,
 		 const ControlInfoMap &sensorControls,
 		 ControlInfoMap *ipaControls) override;
-	int start() override;
+	void start(const ControlList &controls, StartResult *result) override;
 	void stop() override;
 
 	int configure(const IPAConfigInfo &ipaConfig,
@@ -215,10 +215,12 @@ int IPARkISP1::init(const IPASettings &settings, unsigned int hwRevision,
 	return 0;
 }
 
-int IPARkISP1::start()
+void IPARkISP1::start(const ControlList &controls, StartResult *result)
 {
-	/* \todo Properly handle startup controls. */
-	return 0;
+	IPAFrameContext frameContext = {};
+	initializeFrameContext(0, frameContext, controls);
+	result->controls = getSensorControls(frameContext);
+	result->code = 0;
 }
 
 void IPARkISP1::stop()
diff --git a/src/libcamera/pipeline/rkisp1/rkisp1.cpp b/src/libcamera/pipeline/rkisp1/rkisp1.cpp
index 0e6e45bba75b..d937c94e351f 100644
--- a/src/libcamera/pipeline/rkisp1/rkisp1.cpp
+++ b/src/libcamera/pipeline/rkisp1/rkisp1.cpp
@@ -1290,13 +1290,20 @@ int PipelineHandlerRkISP1::start(Camera *camera, [[maybe_unused]] const ControlL
 		return ret;
 	actions += [&]() { freeBuffers(camera); };
 
-	ret = data->ipa_->start();
-	if (ret) {
+	ControlList ctrls;
+	if (!!controls)
+		ctrls = *controls;
+
+	ipa::rkisp1::StartResult res;
+	data->ipa_->start(ctrls, &res);
+	if (res.code) {
 		LOG(RkISP1, Error)
 			<< "Failed to start IPA " << camera->id();
 		return ret;
 	}
 	actions += [&]() { data->ipa_->stop(); };
+	data->sensor_->setControls(&res.controls);
+	data->delayedCtrls_->reset();
 
 	data->frame_ = 0;