diff --git a/src/libcamera/pipeline/rkisp1/rkisp1.cpp b/src/libcamera/pipeline/rkisp1/rkisp1.cpp
index 4cbf105d..5f94f422 100644
--- a/src/libcamera/pipeline/rkisp1/rkisp1.cpp
+++ b/src/libcamera/pipeline/rkisp1/rkisp1.cpp
@@ -1202,11 +1202,24 @@ bool PipelineHandlerRkISP1::match(DeviceEnumerator *enumerator)
 	if (param_->open() < 0)
 		return false;
 
+	/*
+	 * Retrieve the ISP maximum input size for config validation in the
+	 * path classes.
+	 */
+	Size ispMaxInputSize;
+	V4L2Subdevice::Formats ispFormats = isp_->formats(0);
+	for (const auto &[mbus, sizes] : ispFormats) {
+		for (const auto &size : sizes) {
+			if (ispMaxInputSize < size.max)
+				ispMaxInputSize = size.max;
+		}
+	}
+
 	/* Locate and open the ISP main and self paths. */
-	if (!mainPath_.init(media_))
+	if (!mainPath_.init(media_, ispMaxInputSize))
 		return false;
 
-	if (hasSelfPath_ && !selfPath_.init(media_))
+	if (hasSelfPath_ && !selfPath_.init(media_, ispMaxInputSize))
 		return false;
 
 	mainPath_.bufferReady().connect(this, &PipelineHandlerRkISP1::bufferReady);
diff --git a/src/libcamera/pipeline/rkisp1/rkisp1_path.cpp b/src/libcamera/pipeline/rkisp1/rkisp1_path.cpp
index c49017d1..6b40cdd2 100644
--- a/src/libcamera/pipeline/rkisp1/rkisp1_path.cpp
+++ b/src/libcamera/pipeline/rkisp1/rkisp1_path.cpp
@@ -62,7 +62,7 @@ RkISP1Path::RkISP1Path(const char *name, const Span<const PixelFormat> &formats,
 {
 }
 
-bool RkISP1Path::init(MediaDevice *media)
+bool RkISP1Path::init(MediaDevice *media, const Size &ispMaxInputSize)
 {
 	std::string resizer = std::string("rkisp1_resizer_") + name_ + "path";
 	std::string video = std::string("rkisp1_") + name_ + "path";
@@ -75,6 +75,7 @@ bool RkISP1Path::init(MediaDevice *media)
 	if (video_->open() < 0)
 		return false;
 
+	ispMaxInputSize_ = ispMaxInputSize;
 	populateFormats();
 
 	link_ = media->link("rkisp1_isp", 2, resizer, 0);
@@ -126,12 +127,33 @@ void RkISP1Path::populateFormats()
 	}
 }
 
+Size RkISP1Path::maxSupportedSensorResolution(const CameraSensor *sensor)
+{
+	Size sensorResolution;
+
+	/* Get highest sensor resolution which is just less than or equal to ISP input */
+	for (const auto &format : streamFormats_) {
+		auto sizes = sensor->sizes(formatToMediaBus.at(format));
+		for (auto &sz : sizes) {
+			if (sz <= ispMaxInputSize_ && sz > sensorResolution)
+				sensorResolution = sz;
+		}
+	}
+
+	return sensorResolution;
+}
+
 StreamConfiguration
 RkISP1Path::generateConfiguration(const CameraSensor *sensor, const Size &size,
 				  StreamRole role)
 {
 	const std::vector<unsigned int> &mbusCodes = sensor->mbusCodes();
-	const Size &resolution = sensor->resolution();
+	Size resolution = maxSupportedSensorResolution(sensor);
+	if (resolution.isNull()) {
+		LOG(RkISP1, Error) << "No suitable format/resolution found"
+				   << "for ISP input";
+		return {};
+	}
 
 	/* Min and max resolutions to populate the available stream formats. */
 	Size maxResolution = maxResolution_.boundedToAspectRatio(resolution)
@@ -220,7 +242,12 @@ CameraConfiguration::Status RkISP1Path::validate(const CameraSensor *sensor,
 						 StreamConfiguration *cfg)
 {
 	const std::vector<unsigned int> &mbusCodes = sensor->mbusCodes();
-	const Size &resolution = sensor->resolution();
+	Size resolution = maxSupportedSensorResolution(sensor);
+	if (resolution.isNull()) {
+		LOG(RkISP1, Error) << "No suitable format/resolution found"
+				   << "for ISP input";
+		return {};
+	}
 
 	const StreamConfiguration reqCfg = *cfg;
 	CameraConfiguration::Status status = CameraConfiguration::Valid;
@@ -275,8 +302,8 @@ CameraConfiguration::Status RkISP1Path::validate(const CameraSensor *sensor,
 	if (!found)
 		cfg->pixelFormat = isRaw ? rawFormat : formats::NV12;
 
-	Size minResolution;
-	Size maxResolution;
+	Size maxResolution = maxResolution_.boundedTo(resolution);
+	Size minResolution = minResolution_.expandedToAspectRatio(resolution);
 
 	if (isRaw) {
 		/*
@@ -287,16 +314,10 @@ CameraConfiguration::Status RkISP1Path::validate(const CameraSensor *sensor,
 		V4L2SubdeviceFormat sensorFormat =
 			sensor->getFormat({ mbusCode }, cfg->size);
 
-		minResolution = sensorFormat.size;
-		maxResolution = sensorFormat.size;
-	} else {
-		/*
-		 * Adjust the size based on the sensor resolution and absolute
-		 * limits of the ISP.
-		 */
-		minResolution = minResolution_.expandedToAspectRatio(resolution);
-		maxResolution = maxResolution_.boundedToAspectRatio(resolution)
-					      .boundedTo(resolution);
+		if (!sensorFormat.size.isNull()) {
+			minResolution = sensorFormat.size.boundedTo(ispMaxInputSize_);
+			maxResolution = sensorFormat.size.boundedTo(ispMaxInputSize_);
+		}
 	}
 
 	cfg->size.boundTo(maxResolution);
diff --git a/src/libcamera/pipeline/rkisp1/rkisp1_path.h b/src/libcamera/pipeline/rkisp1/rkisp1_path.h
index 08edefec..a9bcfe36 100644
--- a/src/libcamera/pipeline/rkisp1/rkisp1_path.h
+++ b/src/libcamera/pipeline/rkisp1/rkisp1_path.h
@@ -35,7 +35,7 @@ public:
 	RkISP1Path(const char *name, const Span<const PixelFormat> &formats,
 		   const Size &minResolution, const Size &maxResolution);
 
-	bool init(MediaDevice *media);
+	bool init(MediaDevice *media, const Size &ispMaxInputSize);
 
 	int setEnabled(bool enable) { return link_->setEnabled(enable); }
 	bool isEnabled() const { return link_->flags() & MEDIA_LNK_FL_ENABLED; }
@@ -63,6 +63,7 @@ public:
 
 private:
 	void populateFormats();
+	Size maxSupportedSensorResolution(const CameraSensor *sensor);
 
 	static constexpr unsigned int RKISP1_BUFFER_COUNT = 4;
 
@@ -77,6 +78,8 @@ private:
 	std::unique_ptr<V4L2Subdevice> resizer_;
 	std::unique_ptr<V4L2VideoDevice> video_;
 	MediaLink *link_;
+
+	Size ispMaxInputSize_;
 };
 
 class RkISP1MainPath : public RkISP1Path