diff --git a/src/ipa/libipa/exposure_mode_helper.cpp b/src/ipa/libipa/exposure_mode_helper.cpp
index 0c1e99e3..b776a031 100644
--- a/src/ipa/libipa/exposure_mode_helper.cpp
+++ b/src/ipa/libipa/exposure_mode_helper.cpp
@@ -70,18 +70,37 @@ namespace ipa {
  * the runtime limits set through setLimits() instead.
  */
 ExposureModeHelper::ExposureModeHelper(const Span<std::pair<utils::Duration, double>> stages)
+	: lineDuration_(1us), minExposureTime_(0us), maxExposureTime_(0us),
+	  minGain_(0), maxGain_(0), sensorHelper_(nullptr)
 {
-	minExposureTime_ = 0us;
-	maxExposureTime_ = 0us;
-	minGain_ = 0;
-	maxGain_ = 0;
-
 	for (const auto &[s, g] : stages) {
 		exposureTimes_.push_back(s);
 		gains_.push_back(g);
 	}
 }
 
+/**
+ * \brief Configure sensor details
+ * \param[in] lineDuration The current line length of the sensor
+ * \param[in] sensorHelper The sensor helper
+ *
+ * This function sets the line length and sensor helper. These are used in
+ * splitExposure() to take the quantization of the exposure and gain into
+ * account.
+ *
+ * When this has not been called, it is assumed that exposure is in micro second
+ * granularity and gain has no quantization at all.
+ *
+ * ExposureModeHelper keeps a pointer to the CameraSensorHelper, so the caller
+ * has to ensure that sensorHelper is valid until the next call to configure().
+ */
+void ExposureModeHelper::configure(utils::Duration lineDuration,
+				   const CameraSensorHelper *sensorHelper)
+{
+	lineDuration_ = lineDuration;
+	sensorHelper_ = sensorHelper;
+}
+
 /**
  * \brief Set the exposure time and gain limits
  * \param[in] minExposureTime The minimum exposure time supported
@@ -108,14 +127,26 @@ void ExposureModeHelper::setLimits(utils::Duration minExposureTime,
 	maxGain_ = maxGain;
 }
 
-utils::Duration ExposureModeHelper::clampExposureTime(utils::Duration exposureTime) const
+utils::Duration ExposureModeHelper::clampExposureTime(utils::Duration exposureTime,
+						      double *quantizationGain) const
 {
-	return std::clamp(exposureTime, minExposureTime_, maxExposureTime_);
+	utils::Duration clamped;
+	utils::Duration exp;
+
+	clamped = std::clamp(exposureTime, minExposureTime_, maxExposureTime_);
+	exp = static_cast<long>(clamped / lineDuration_) * lineDuration_;
+	if (quantizationGain)
+		*quantizationGain = clamped / exp;
+
+	return exp;
 }
 
-double ExposureModeHelper::clampGain(double gain) const
+double ExposureModeHelper::clampGain(double gain, double *quantizationGain) const
 {
-	return std::clamp(gain, minGain_, maxGain_);
+	double clamped = std::clamp(gain, minGain_, maxGain_);
+	if (!sensorHelper_)
+		return clamped;
+	return sensorHelper_->quantizeGain(clamped, quantizationGain);
 }
 
 /**
diff --git a/src/ipa/libipa/exposure_mode_helper.h b/src/ipa/libipa/exposure_mode_helper.h
index c5be1b67..ac7e8da9 100644
--- a/src/ipa/libipa/exposure_mode_helper.h
+++ b/src/ipa/libipa/exposure_mode_helper.h
@@ -14,6 +14,8 @@
 #include <libcamera/base/span.h>
 #include <libcamera/base/utils.h>
 
+#include "camera_sensor_helper.h"
+
 namespace libcamera {
 
 namespace ipa {
@@ -24,6 +26,7 @@ public:
 	ExposureModeHelper(const Span<std::pair<utils::Duration, double>> stages);
 	~ExposureModeHelper() = default;
 
+	void configure(utils::Duration lineLength, const CameraSensorHelper *sensorHelper);
 	void setLimits(utils::Duration minExposureTime, utils::Duration maxExposureTime,
 		       double minGain, double maxGain);
 
@@ -36,16 +39,19 @@ public:
 	double maxGain() const { return maxGain_; }
 
 private:
-	utils::Duration clampExposureTime(utils::Duration exposureTime) const;
-	double clampGain(double gain) const;
+	utils::Duration clampExposureTime(utils::Duration exposureTime,
+					  double *quantizationGain = nullptr) const;
+	double clampGain(double gain, double *quantizationGain = nullptr) const;
 
 	std::vector<utils::Duration> exposureTimes_;
 	std::vector<double> gains_;
 
+	utils::Duration lineDuration_;
 	utils::Duration minExposureTime_;
 	utils::Duration maxExposureTime_;
 	double minGain_;
 	double maxGain_;
+	const CameraSensorHelper *sensorHelper_;
 };
 
 } /* namespace ipa */