diff --git a/src/libcamera/pipeline/ipu3/ipu3.cpp b/src/libcamera/pipeline/ipu3/ipu3.cpp
index 6c5617cd..651069c6 100644
--- a/src/libcamera/pipeline/ipu3/ipu3.cpp
+++ b/src/libcamera/pipeline/ipu3/ipu3.cpp
@@ -6,9 +6,12 @@
  */
 
 #include <algorithm>
+#include <fcntl.h>
 #include <iomanip>
 #include <memory>
 #include <queue>
+#include <sys/mman.h>
+#include <unistd.h>
 #include <vector>
 
 #include <libcamera/base/log.h>
@@ -61,6 +64,7 @@ public:
        void queuePendingRequests();
        void cancelPendingRequests();
        void frameStart(uint32_t sequence);
+       void dumpBuffer(FrameBuffer *paramBuffer);
 
        CIO2Device cio2_;
        ImgUDevice *imgu_;
@@ -1288,6 +1292,7 @@ void IPU3CameraData::queueFrameAction(unsigned int id,
                }
 
                imgu_->param_->queueBuffer(info->paramBuffer);
+               dumpBuffer(info->paramBuffer);
                imgu_->stat_->queueBuffer(info->statBuffer);
                imgu_->input_->queueBuffer(info->rawBuffer);
 
@@ -1313,6 +1318,24 @@ void IPU3CameraData::queueFrameAction(unsigned int id,
        }
 }
 
+void IPU3CameraData::dumpBuffer(FrameBuffer *buffer)
+{
+       for (const FrameBuffer::Plane &plane : buffer->planes()) {
+               void *address = mmap(nullptr, plane.length, PROT_WRITE,
+                                    MAP_SHARED, plane.fd.get(), 0);
+               if (address == MAP_FAILED) {
+                       LOG(IPU3, Error) << "Failed to mmap plane";
+                       break;
+               }
+
+               int out_fd = open("/tmp/IPU3_params.bin",
+                                 O_WRONLY | O_TRUNC | O_CREAT, 0644);
+               write(out_fd, address, plane.length);
+               close(out_fd);
+               munmap(address, plane.length);
+       }
+}
+
 /* -----------------------------------------------------------------------------
  * Buffer Ready slots
  */>