diff --git a/include/libcamera/internal/mapped_framebuffer.h b/include/libcamera/internal/mapped_framebuffer.h
index 6aaabf5086b4658363e4e2ed02242248bfffdcbc..f7a6870764c4d035f77544354aa46a70095952a0 100644
--- a/include/libcamera/internal/mapped_framebuffer.h
+++ b/include/libcamera/internal/mapped_framebuffer.h
@@ -55,6 +55,10 @@ public:
 	using MapFlags = Flags<MapFlag>;
 
 	MappedFrameBuffer(const FrameBuffer *buffer, MapFlags flags);
+	int getPlaneFD(unsigned int plane);
+
+private:
+	const FrameBuffer *buffer_;
 };
 
 LIBCAMERA_FLAGS_ENABLE_OPERATORS(MappedFrameBuffer::MapFlag)
diff --git a/src/libcamera/mapped_framebuffer.cpp b/src/libcamera/mapped_framebuffer.cpp
index f54bbf21f10987aecdf02c0a946edbb4931dd4c0..e85030d904ffaa5cd8cfae7b02d4b1b7010452a5 100644
--- a/src/libcamera/mapped_framebuffer.cpp
+++ b/src/libcamera/mapped_framebuffer.cpp
@@ -238,6 +238,16 @@ MappedFrameBuffer::MappedFrameBuffer(const FrameBuffer *buffer, MapFlags flags)
 
 		planes_.emplace_back(info.address + plane.offset, plane.length);
 	}
+
+	buffer_ = buffer;
+}
+
+int MappedFrameBuffer::getPlaneFD(unsigned int plane)
+{
+	if (plane > buffer_->planes().size())
+		return -EINVAL;
+
+	return buffer_->planes()[plane].fd.get();
 }
 
 } /* namespace libcamera */