diff --git a/include/libcamera/internal/matrix.h b/include/libcamera/internal/matrix.h
index 512c1162c..6d40567af 100644
--- a/include/libcamera/internal/matrix.h
+++ b/include/libcamera/internal/matrix.h
@@ -34,6 +34,11 @@ public:
 		std::copy(data.begin(), data.end(), data_.begin());
 	}
 
+	Matrix(const Span<const T, Rows * Cols> data)
+	{
+		std::copy(data.begin(), data.end(), data_.begin());
+	}
+
 	static constexpr Matrix identity()
 	{
 		Matrix ret;
diff --git a/src/libcamera/matrix.cpp b/src/libcamera/matrix.cpp
index e7e027225..49e2aa3b4 100644
--- a/src/libcamera/matrix.cpp
+++ b/src/libcamera/matrix.cpp
@@ -41,6 +41,16 @@ LOG_DEFINE_CATEGORY(Matrix)
  * number of rows and columns of the matrix (Rows x Cols).
  */
 
+/**
+ * \fn Matrix::Matrix(const Span<const T, Rows * Cols> data)
+ * \brief Construct a matrix from supplied data
+ * \param[in] data Data from which to construct a matrix
+ *
+ * \a data is a one-dimensional Span and will be turned into a matrix in
+ * row-major order. The size of \a data must be equal to the product of the
+ * number of rows and columns of the matrix (Rows x Cols).
+ */
+
 /**
  * \fn Matrix::identity()
  * \brief Construct an identity matrix