diff --git a/src/libcamera/pipeline/rkisp1/rkisp1.cpp b/src/libcamera/pipeline/rkisp1/rkisp1.cpp
index 0a794d63..97ce8457 100644
--- a/src/libcamera/pipeline/rkisp1/rkisp1.cpp
+++ b/src/libcamera/pipeline/rkisp1/rkisp1.cpp
@@ -1274,6 +1274,17 @@ bool PipelineHandlerRkISP1::match(DeviceEnumerator *enumerator)
 	if (isp_->open() < 0)
 		return false;
 
+	/*
+	 * Retrieve the ISP maximum input size for config validation in the
+	 * path classes.
+	 *
+	 * The ISP maximum input size is independent of the media bus formats
+	 * hence, pick the one first entry of ispFormats and its size range.
+	 */
+	V4L2Subdevice::Formats ispFormats = isp_->formats(0);
+	const SizeRange range = ispFormats.cbegin()->second[0];
+	Size ispMaxInputSize = range.max;
+
 	/* Locate and open the optional CSI-2 receiver. */
 	ispSink_ = isp_->entity()->getPadByIndex(0);
 	if (!ispSink_ || ispSink_->links().empty())
@@ -1300,10 +1311,10 @@ bool PipelineHandlerRkISP1::match(DeviceEnumerator *enumerator)
 		return false;
 
 	/* 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..9053af18 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, Size ispMaxInputSize)
 {
 	std::string resizer = std::string("rkisp1_resizer_") + name_ + "path";
 	std::string video = std::string("rkisp1_") + name_ + "path";
@@ -77,6 +77,8 @@ bool RkISP1Path::init(MediaDevice *media)
 
 	populateFormats();
 
+	maxResolution_.boundTo(ispMaxInputSize);
+
 	link_ = media->link("rkisp1_isp", 2, resizer, 0);
 	if (!link_)
 		return false;
diff --git a/src/libcamera/pipeline/rkisp1/rkisp1_path.h b/src/libcamera/pipeline/rkisp1/rkisp1_path.h
index 08edefec..13ba4b62 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, Size ispMaxInputSize);
 
 	int setEnabled(bool enable) { return link_->setEnabled(enable); }
 	bool isEnabled() const { return link_->flags() & MEDIA_LNK_FL_ENABLED; }