diff --git a/include/uapi/linux/media/dreamchip/rppx1-config.h b/include/uapi/linux/media/dreamchip/rppx1-config.h
new file mode 100644
index 000000000000..1f2548db73ad
--- /dev/null
+++ b/include/uapi/linux/media/dreamchip/rppx1-config.h
@@ -0,0 +1,69 @@
+/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
+/*
+ * Dreamchip RPP-X1 ISP Driver - Userspace API
+ *
+ * Copyright (C) 2026 Renesas Electronics Corp.
+ * Copyright (C) 2026 Ideas on Board Oy
+ * Copyright (C) 2026 Ragnatech AB
+ */
+
+#ifndef __UAPI_RPP_X1_CONFIG_H
+#define __UAPI_RPP_X1_CONFIG_H
+
+#include <linux/media/v4l2-isp.h>
+
+/**
+ * struct rppx1_window - Measurement window
+ *
+ * RPP-X1 measurement window. Different blocks use a window or multiple
+ * windows for measurement purposes. This defines a common type for all of
+ * them. The number of relevant bits depends on the block where the window is
+ * used and is specified in the per-block description
+ *
+ * @h_offs: horizontal offset from the left of the frame in pixels
+ * @v_offs: vertical offset from the top of the frame in pixels
+ * @h_size: horizontal size of the window in pixels
+ * @v_size: vertical size of the window in pixels
+ */
+struct rppx1_window {
+	__u16 h_offs;
+	__u16 v_offs;
+	__u16 h_size;
+	__u16 v_size;
+};
+
+/* ---------------------------------------------------------------------------
+ * Parameter Structures
+ *
+ * The same ISP block might be instantiated in multiple pipeliness and operate
+ * on a different bitdepth/precision. For fields of varying length among
+ * different instances of the same block, use a data type that can accommodate
+ * the larger bitdepth/precision.
+ */
+
+/**
+ * RPPX1_PARAMS_MAX_SIZE - Maximum size of all RPP-X1 parameter blocks
+ *
+ * Some types are reported twice as the same block might be instantiated in
+ * multiple pipes.
+ */
+#define RPPX1_PARAMS_MAX_SIZE 0
+
+/* ---------------------------------------------------------------------------
+ * Statistics Structures
+ *
+ * The same ISP block might be instantiated in multiple pipeliness and operate
+ * on a different bitdepth/precision. For fields of varying length among
+ * different instances of the same block, use a data type that can accommodate
+ * the larger bitdepth/precision.
+ */
+
+/**
+ * RPPX1_STATS_MAX_SIZE - Maximum size of all RPP-X1 statistics
+ *
+ * Some types are reported twice as the same block might be instantiated in
+ * multiple pipes.
+ */
+#define RPPX1_STATS_MAX_SIZE 0
+
+#endif /* __UAPI_RPP_X1_CONFIG_H */