diff --git a/include/libcamera/internal/software_isp/software_isp.h b/include/libcamera/internal/software_isp/software_isp.h
index 4bb30f07..d2b47ecc 100644
--- a/include/libcamera/internal/software_isp/software_isp.h
+++ b/include/libcamera/internal/software_isp/software_isp.h
@@ -84,7 +84,8 @@ public:
 	Signal<const ControlList &> setSensorControls;
 
 private:
-	void saveIspParams();
+	void saveIspParams(uint32_t paramsBufferId);
+	void releaseIspParams(uint32_t paramsBufferId);
 	void setSensorCtrls(const ControlList &sensorControls);
 	void statsReady(uint32_t frame, uint32_t bufferId);
 	void inputReady(FrameBuffer *input);
diff --git a/include/libcamera/ipa/soft.mojom b/include/libcamera/ipa/soft.mojom
index 85c61824..1498aedf 100644
--- a/include/libcamera/ipa/soft.mojom
+++ b/include/libcamera/ipa/soft.mojom
@@ -24,11 +24,11 @@ interface IPASoftInterface {
 		=> (int32 ret);
 
 	[async] queueRequest(uint32 frame, libcamera.ControlList sensorControls);
-	prepare(uint32 frame);
+	prepare(uint32 frame, uint32 paramsBufferId);
 	[async] processStats(uint32 frame, uint32 bufferId, libcamera.ControlList sensorControls);
 };
 
 interface IPASoftEventInterface {
 	setSensorControls(libcamera.ControlList sensorControls);
-	setIspParams();
+	setIspParams(uint32 paramsBufferId);
 };
diff --git a/src/ipa/simple/soft_simple.cpp b/src/ipa/simple/soft_simple.cpp
index 547d0fcf..9d5fe923 100644
--- a/src/ipa/simple/soft_simple.cpp
+++ b/src/ipa/simple/soft_simple.cpp
@@ -56,7 +56,7 @@ public:
 	void stop() override;
 
 	void queueRequest(const uint32_t frame, const ControlList &controls) override;
-	void prepare(const uint32_t frame) override;
+	void prepare(const uint32_t frame, const uint32_t paramsBufferId) override;
 	void processStats(const uint32_t frame, const uint32_t bufferId,
 			  const ControlList &sensorControls) override;
 
@@ -254,12 +254,13 @@ void IPASoftSimple::queueRequest(const uint32_t frame, const ControlList &contro
 		algo->queueRequest(context_, frame, frameContext, controls);
 }
 
-void IPASoftSimple::prepare(const uint32_t frame)
+void IPASoftSimple::prepare(const uint32_t frame,
+			    const uint32_t paramsBufferId)
 {
 	IPAFrameContext &frameContext = context_.frameContexts.get(frame);
 	for (auto const &algo : algorithms())
 		algo->prepare(context_, frame, frameContext, params_);
-	setIspParams.emit();
+	setIspParams.emit(paramsBufferId);
 }
 
 void IPASoftSimple::processStats(
diff --git a/src/libcamera/software_isp/debayer.cpp b/src/libcamera/software_isp/debayer.cpp
index e2295f35..8bd58c3d 100644
--- a/src/libcamera/software_isp/debayer.cpp
+++ b/src/libcamera/software_isp/debayer.cpp
@@ -94,9 +94,10 @@ Debayer::~Debayer()
  */
 
 /**
- * \fn void Debayer::process(uint32_t frame, FrameBuffer *input, FrameBuffer *output, DebayerParams params)
+ * \fn void Debayer::process(uint32_t frame, const uint32_t paramsBufferId, FrameBuffer *input, FrameBuffer *output, DebayerParams params)
  * \brief Process the bayer data into the requested format
  * \param[in] frame The frame number
+ * \param[in] paramsBufferId The id of the params buffer in use
  * \param[in] input The input buffer
  * \param[in] output The output buffer
  * \param[in] params The parameters to be used in debayering
@@ -124,4 +125,9 @@ Debayer::~Debayer()
  * \brief Signals when the output buffer is ready
  */
 
+/**
+ * \var Signal<uint32_t> Debayer::releaseIspParams
+ * \brief Signals when the processing params are no longer needed
+ */
+
 } /* namespace libcamera */
diff --git a/src/libcamera/software_isp/debayer.h b/src/libcamera/software_isp/debayer.h
index d7ca060d..93020735 100644
--- a/src/libcamera/software_isp/debayer.h
+++ b/src/libcamera/software_isp/debayer.h
@@ -40,12 +40,16 @@ public:
 	virtual std::tuple<unsigned int, unsigned int>
 	strideAndFrameSize(const PixelFormat &outputFormat, const Size &size) = 0;
 
-	virtual void process(uint32_t frame, FrameBuffer *input, FrameBuffer *output, DebayerParams params) = 0;
+	virtual void process(uint32_t frame,
+			     const uint32_t paramsBufferId,
+			     FrameBuffer *input, FrameBuffer *output,
+			     DebayerParams params) = 0;
 
 	virtual SizeRange sizes(PixelFormat inputFormat, const Size &inputSize) = 0;
 
 	Signal<FrameBuffer *> inputBufferReady;
 	Signal<FrameBuffer *> outputBufferReady;
+	Signal<uint32_t> releaseIspParams;
 
 private:
 	virtual Size patternSize(PixelFormat inputFormat) = 0;
diff --git a/src/libcamera/software_isp/debayer_cpu.cpp b/src/libcamera/software_isp/debayer_cpu.cpp
index f7b3a7d1..20a15ae0 100644
--- a/src/libcamera/software_isp/debayer_cpu.cpp
+++ b/src/libcamera/software_isp/debayer_cpu.cpp
@@ -724,7 +724,9 @@ static inline int64_t timeDiff(timespec &after, timespec &before)
 	       (int64_t)after.tv_nsec - (int64_t)before.tv_nsec;
 }
 
-void DebayerCpu::process(uint32_t frame, FrameBuffer *input, FrameBuffer *output, DebayerParams params)
+void DebayerCpu::process(uint32_t frame,
+			 const uint32_t paramsBufferId,
+			 FrameBuffer *input, FrameBuffer *output, DebayerParams params)
 {
 	timespec frameStartTime;
 
@@ -737,6 +739,8 @@ void DebayerCpu::process(uint32_t frame, FrameBuffer *input, FrameBuffer *output
 	red_ = swapRedBlueGains_ ? params.blue : params.red;
 	blue_ = swapRedBlueGains_ ? params.red : params.blue;
 
+	releaseIspParams.emit(paramsBufferId);
+
 	/* Copy metadata from the input buffer */
 	FrameMetadata &metadata = output->_d()->metadata();
 	metadata.status = input->metadata().status;
diff --git a/src/libcamera/software_isp/debayer_cpu.h b/src/libcamera/software_isp/debayer_cpu.h
index 2c47e7c6..0b5a5258 100644
--- a/src/libcamera/software_isp/debayer_cpu.h
+++ b/src/libcamera/software_isp/debayer_cpu.h
@@ -36,7 +36,9 @@ public:
 	std::vector<PixelFormat> formats(PixelFormat input);
 	std::tuple<unsigned int, unsigned int>
 	strideAndFrameSize(const PixelFormat &outputFormat, const Size &size);
-	void process(uint32_t frame, FrameBuffer *input, FrameBuffer *output, DebayerParams params);
+	void process(uint32_t frame,
+		     const uint32_t paramsBufferId,
+		     FrameBuffer *input, FrameBuffer *output, DebayerParams params);
 	SizeRange sizes(PixelFormat inputFormat, const Size &inputSize);
 
 	/**
diff --git a/src/libcamera/software_isp/software_isp.cpp b/src/libcamera/software_isp/software_isp.cpp
index dbf27f31..0412b401 100644
--- a/src/libcamera/software_isp/software_isp.cpp
+++ b/src/libcamera/software_isp/software_isp.cpp
@@ -106,6 +106,7 @@ SoftwareIsp::SoftwareIsp(PipelineHandler *pipe, const CameraSensor *sensor)
 	debayer_ = std::make_unique<DebayerCpu>(std::move(stats));
 	debayer_->inputBufferReady.connect(this, &SoftwareIsp::inputReady);
 	debayer_->outputBufferReady.connect(this, &SoftwareIsp::outputReady);
+	debayer_->releaseIspParams.connect(this, &SoftwareIsp::releaseIspParams);
 
 	ipa_ = IPAManager::createIPA<ipa::soft::IPAProxySoft>(pipe, 0, 0);
 	if (!ipa_) {
@@ -352,16 +353,22 @@ void SoftwareIsp::stop()
  */
 void SoftwareIsp::process(uint32_t frame, FrameBuffer *input, FrameBuffer *output)
 {
-	ipa_->prepare(frame);
+	/* \todo Provide a real value */
+	constexpr uint32_t paramsBufferId = 0;
+	ipa_->prepare(frame, paramsBufferId);
 	debayer_->invokeMethod(&DebayerCpu::process,
-			       ConnectionTypeQueued, frame, input, output, debayerParams_);
+			       ConnectionTypeQueued, frame, paramsBufferId, input, output, debayerParams_);
 }
 
-void SoftwareIsp::saveIspParams()
+void SoftwareIsp::saveIspParams([[maybe_unused]] uint32_t paramsBufferId)
 {
 	debayerParams_ = *sharedParams_;
 }
 
+void SoftwareIsp::releaseIspParams([[maybe_unused]] uint32_t paramsBufferId)
+{
+}
+
 void SoftwareIsp::setSensorCtrls(const ControlList &sensorControls)
 {
 	setSensorControls.emit(sensorControls);