diff --git a/include/drm/display/drm_dp_mst.h b/include/drm/display/drm_dp_mst.h
new file mode 100644
index 000000000000..4e398bfd3ee3
--- /dev/null
+++ b/include/drm/display/drm_dp_mst.h
@@ -0,0 +1,238 @@
+/* SPDX-License-Identifier: MIT */
+
+#ifndef _DRM_DP_MST_H_
+#define _DRM_DP_MST_H_
+
+#include <linux/types.h>
+
+struct drm_dp_nak_reply {
+	u8 guid[16];
+	u8 reason;
+	u8 nak_data;
+};
+
+struct drm_dp_link_address_ack_reply {
+	u8 guid[16];
+	u8 nports;
+	struct drm_dp_link_addr_reply_port {
+		bool input_port;
+		u8 peer_device_type;
+		u8 port_number;
+		bool mcs;
+		bool ddps;
+		bool legacy_device_plug_status;
+		u8 dpcd_revision;
+		u8 peer_guid[16];
+		u8 num_sdp_streams;
+		u8 num_sdp_stream_sinks;
+	} ports[16];
+};
+
+struct drm_dp_remote_dpcd_read_ack_reply {
+	u8 port_number;
+	u8 num_bytes;
+	u8 bytes[255];
+};
+
+struct drm_dp_remote_dpcd_write_ack_reply {
+	u8 port_number;
+};
+
+struct drm_dp_remote_dpcd_write_nak_reply {
+	u8 port_number;
+	u8 reason;
+	u8 bytes_written_before_failure;
+};
+
+struct drm_dp_remote_i2c_read_ack_reply {
+	u8 port_number;
+	u8 num_bytes;
+	u8 bytes[255];
+};
+
+struct drm_dp_remote_i2c_read_nak_reply {
+	u8 port_number;
+	u8 nak_reason;
+	u8 i2c_nak_transaction;
+};
+
+struct drm_dp_remote_i2c_write_ack_reply {
+	u8 port_number;
+};
+
+struct drm_dp_query_stream_enc_status_ack_reply {
+	/* Bit[23:16]- Stream Id */
+	u8 stream_id;
+
+	/* Bit[15]- Signed */
+	bool reply_signed;
+
+	/* Bit[10:8]- Stream Output Sink Type */
+	bool unauthorizable_device_present;
+	bool legacy_device_present;
+	bool query_capable_device_present;
+
+	/* Bit[12:11]- Stream Output CP Type */
+	bool hdcp_1x_device_present;
+	bool hdcp_2x_device_present;
+
+	/* Bit[4]- Stream Authentication */
+	bool auth_completed;
+
+	/* Bit[3]- Stream Encryption */
+	bool encryption_enabled;
+
+	/* Bit[2]- Stream Repeater Function Present */
+	bool repeater_present;
+
+	/* Bit[1:0]- Stream State */
+	u8 state;
+};
+
+#define DRM_DP_MAX_SDP_STREAMS 16
+struct drm_dp_allocate_payload {
+	u8 port_number;
+	u8 number_sdp_streams;
+	u8 vcpi;
+	u16 pbn;
+	u8 sdp_stream_sink[DRM_DP_MAX_SDP_STREAMS];
+};
+
+struct drm_dp_allocate_payload_ack_reply {
+	u8 port_number;
+	u8 vcpi;
+	u16 allocated_pbn;
+};
+
+struct drm_dp_connection_status_notify {
+	u8 guid[16];
+	u8 port_number;
+	bool legacy_device_plug_status;
+	bool displayport_device_plug_status;
+	bool message_capability_status;
+	bool input_port;
+	u8 peer_device_type;
+};
+
+struct drm_dp_remote_dpcd_read {
+	u8 port_number;
+	u32 dpcd_address;
+	u8 num_bytes;
+};
+
+struct drm_dp_remote_dpcd_write {
+	u8 port_number;
+	u32 dpcd_address;
+	u8 num_bytes;
+	u8 *bytes;
+};
+
+#define DP_REMOTE_I2C_READ_MAX_TRANSACTIONS 4
+struct drm_dp_remote_i2c_read {
+	u8 num_transactions;
+	u8 port_number;
+	struct drm_dp_remote_i2c_read_tx {
+		u8 i2c_dev_id;
+		u8 num_bytes;
+		u8 *bytes;
+		u8 no_stop_bit;
+		u8 i2c_transaction_delay;
+	} transactions[DP_REMOTE_I2C_READ_MAX_TRANSACTIONS];
+	u8 read_i2c_device_id;
+	u8 num_bytes_read;
+};
+
+struct drm_dp_remote_i2c_write {
+	u8 port_number;
+	u8 write_i2c_device_id;
+	u8 num_bytes;
+	u8 *bytes;
+};
+
+struct drm_dp_query_stream_enc_status {
+	u8 stream_id;
+	u8 client_id[7];	/* 56-bit nonce */
+	u8 stream_event;
+	bool valid_stream_event;
+	u8 stream_behavior;
+	u8 valid_stream_behavior;
+};
+
+/* this covers ENUM_RESOURCES, POWER_DOWN_PHY, POWER_UP_PHY */
+struct drm_dp_port_number_req {
+	u8 port_number;
+};
+
+struct drm_dp_enum_path_resources_ack_reply {
+	u8 port_number;
+	bool fec_capable;
+	u16 full_payload_bw_number;
+	u16 avail_payload_bw_number;
+};
+
+/* covers POWER_DOWN_PHY, POWER_UP_PHY */
+struct drm_dp_port_number_rep {
+	u8 port_number;
+};
+
+struct drm_dp_query_payload {
+	u8 port_number;
+	u8 vcpi;
+};
+
+struct drm_dp_resource_status_notify {
+	u8 port_number;
+	u8 guid[16];
+	u16 available_pbn;
+};
+
+struct drm_dp_query_payload_ack_reply {
+	u8 port_number;
+	u16 allocated_pbn;
+};
+
+struct drm_dp_sideband_msg_req_body {
+	u8 req_type;
+	union ack_req {
+		struct drm_dp_connection_status_notify conn_stat;
+		struct drm_dp_port_number_req port_num;
+		struct drm_dp_resource_status_notify resource_stat;
+
+		struct drm_dp_query_payload query_payload;
+		struct drm_dp_allocate_payload allocate_payload;
+
+		struct drm_dp_remote_dpcd_read dpcd_read;
+		struct drm_dp_remote_dpcd_write dpcd_write;
+
+		struct drm_dp_remote_i2c_read i2c_read;
+		struct drm_dp_remote_i2c_write i2c_write;
+
+		struct drm_dp_query_stream_enc_status enc_status;
+	} u;
+};
+
+struct drm_dp_sideband_msg_reply_body {
+	u8 reply_type;
+	u8 req_type;
+	union ack_replies {
+		struct drm_dp_nak_reply nak;
+		struct drm_dp_link_address_ack_reply link_addr;
+		struct drm_dp_port_number_rep port_number;
+
+		struct drm_dp_enum_path_resources_ack_reply path_resources;
+		struct drm_dp_allocate_payload_ack_reply allocate_payload;
+		struct drm_dp_query_payload_ack_reply query_payload;
+
+		struct drm_dp_remote_dpcd_read_ack_reply remote_dpcd_read_ack;
+		struct drm_dp_remote_dpcd_write_ack_reply remote_dpcd_write_ack;
+		struct drm_dp_remote_dpcd_write_nak_reply remote_dpcd_write_nack;
+
+		struct drm_dp_remote_i2c_read_ack_reply remote_i2c_read_ack;
+		struct drm_dp_remote_i2c_read_nak_reply remote_i2c_read_nack;
+		struct drm_dp_remote_i2c_write_ack_reply remote_i2c_write_ack;
+
+		struct drm_dp_query_stream_enc_status_ack_reply enc_status;
+	} u;
+};
+
+#endif
diff --git a/include/drm/display/drm_dp_mst_helper.h b/include/drm/display/drm_dp_mst_helper.h
index 9b19d8bd520a..61add6f6accd 100644
--- a/include/drm/display/drm_dp_mst_helper.h
+++ b/include/drm/display/drm_dp_mst_helper.h
@@ -23,6 +23,7 @@
 #define _DRM_DP_MST_HELPER_H_
 
 #include <linux/types.h>
+#include <drm/display/drm_dp_mst.h>
 #include <drm/display/drm_dp_helper.h>
 #include <drm/drm_atomic.h>
 #include <drm/drm_fixed.h>
@@ -248,237 +249,6 @@ struct drm_dp_mst_branch {
 	u8 guid[16];
 };
 
-
-struct drm_dp_nak_reply {
-	u8 guid[16];
-	u8 reason;
-	u8 nak_data;
-};
-
-struct drm_dp_link_address_ack_reply {
-	u8 guid[16];
-	u8 nports;
-	struct drm_dp_link_addr_reply_port {
-		bool input_port;
-		u8 peer_device_type;
-		u8 port_number;
-		bool mcs;
-		bool ddps;
-		bool legacy_device_plug_status;
-		u8 dpcd_revision;
-		u8 peer_guid[16];
-		u8 num_sdp_streams;
-		u8 num_sdp_stream_sinks;
-	} ports[16];
-};
-
-struct drm_dp_remote_dpcd_read_ack_reply {
-	u8 port_number;
-	u8 num_bytes;
-	u8 bytes[255];
-};
-
-struct drm_dp_remote_dpcd_write_ack_reply {
-	u8 port_number;
-};
-
-struct drm_dp_remote_dpcd_write_nak_reply {
-	u8 port_number;
-	u8 reason;
-	u8 bytes_written_before_failure;
-};
-
-struct drm_dp_remote_i2c_read_ack_reply {
-	u8 port_number;
-	u8 num_bytes;
-	u8 bytes[255];
-};
-
-struct drm_dp_remote_i2c_read_nak_reply {
-	u8 port_number;
-	u8 nak_reason;
-	u8 i2c_nak_transaction;
-};
-
-struct drm_dp_remote_i2c_write_ack_reply {
-	u8 port_number;
-};
-
-struct drm_dp_query_stream_enc_status_ack_reply {
-	/* Bit[23:16]- Stream Id */
-	u8 stream_id;
-
-	/* Bit[15]- Signed */
-	bool reply_signed;
-
-	/* Bit[10:8]- Stream Output Sink Type */
-	bool unauthorizable_device_present;
-	bool legacy_device_present;
-	bool query_capable_device_present;
-
-	/* Bit[12:11]- Stream Output CP Type */
-	bool hdcp_1x_device_present;
-	bool hdcp_2x_device_present;
-
-	/* Bit[4]- Stream Authentication */
-	bool auth_completed;
-
-	/* Bit[3]- Stream Encryption */
-	bool encryption_enabled;
-
-	/* Bit[2]- Stream Repeater Function Present */
-	bool repeater_present;
-
-	/* Bit[1:0]- Stream State */
-	u8 state;
-};
-
-#define DRM_DP_MAX_SDP_STREAMS 16
-struct drm_dp_allocate_payload {
-	u8 port_number;
-	u8 number_sdp_streams;
-	u8 vcpi;
-	u16 pbn;
-	u8 sdp_stream_sink[DRM_DP_MAX_SDP_STREAMS];
-};
-
-struct drm_dp_allocate_payload_ack_reply {
-	u8 port_number;
-	u8 vcpi;
-	u16 allocated_pbn;
-};
-
-struct drm_dp_connection_status_notify {
-	u8 guid[16];
-	u8 port_number;
-	bool legacy_device_plug_status;
-	bool displayport_device_plug_status;
-	bool message_capability_status;
-	bool input_port;
-	u8 peer_device_type;
-};
-
-struct drm_dp_remote_dpcd_read {
-	u8 port_number;
-	u32 dpcd_address;
-	u8 num_bytes;
-};
-
-struct drm_dp_remote_dpcd_write {
-	u8 port_number;
-	u32 dpcd_address;
-	u8 num_bytes;
-	u8 *bytes;
-};
-
-#define DP_REMOTE_I2C_READ_MAX_TRANSACTIONS 4
-struct drm_dp_remote_i2c_read {
-	u8 num_transactions;
-	u8 port_number;
-	struct drm_dp_remote_i2c_read_tx {
-		u8 i2c_dev_id;
-		u8 num_bytes;
-		u8 *bytes;
-		u8 no_stop_bit;
-		u8 i2c_transaction_delay;
-	} transactions[DP_REMOTE_I2C_READ_MAX_TRANSACTIONS];
-	u8 read_i2c_device_id;
-	u8 num_bytes_read;
-};
-
-struct drm_dp_remote_i2c_write {
-	u8 port_number;
-	u8 write_i2c_device_id;
-	u8 num_bytes;
-	u8 *bytes;
-};
-
-struct drm_dp_query_stream_enc_status {
-	u8 stream_id;
-	u8 client_id[7];	/* 56-bit nonce */
-	u8 stream_event;
-	bool valid_stream_event;
-	u8 stream_behavior;
-	u8 valid_stream_behavior;
-};
-
-/* this covers ENUM_RESOURCES, POWER_DOWN_PHY, POWER_UP_PHY */
-struct drm_dp_port_number_req {
-	u8 port_number;
-};
-
-struct drm_dp_enum_path_resources_ack_reply {
-	u8 port_number;
-	bool fec_capable;
-	u16 full_payload_bw_number;
-	u16 avail_payload_bw_number;
-};
-
-/* covers POWER_DOWN_PHY, POWER_UP_PHY */
-struct drm_dp_port_number_rep {
-	u8 port_number;
-};
-
-struct drm_dp_query_payload {
-	u8 port_number;
-	u8 vcpi;
-};
-
-struct drm_dp_resource_status_notify {
-	u8 port_number;
-	u8 guid[16];
-	u16 available_pbn;
-};
-
-struct drm_dp_query_payload_ack_reply {
-	u8 port_number;
-	u16 allocated_pbn;
-};
-
-struct drm_dp_sideband_msg_req_body {
-	u8 req_type;
-	union ack_req {
-		struct drm_dp_connection_status_notify conn_stat;
-		struct drm_dp_port_number_req port_num;
-		struct drm_dp_resource_status_notify resource_stat;
-
-		struct drm_dp_query_payload query_payload;
-		struct drm_dp_allocate_payload allocate_payload;
-
-		struct drm_dp_remote_dpcd_read dpcd_read;
-		struct drm_dp_remote_dpcd_write dpcd_write;
-
-		struct drm_dp_remote_i2c_read i2c_read;
-		struct drm_dp_remote_i2c_write i2c_write;
-
-		struct drm_dp_query_stream_enc_status enc_status;
-	} u;
-};
-
-struct drm_dp_sideband_msg_reply_body {
-	u8 reply_type;
-	u8 req_type;
-	union ack_replies {
-		struct drm_dp_nak_reply nak;
-		struct drm_dp_link_address_ack_reply link_addr;
-		struct drm_dp_port_number_rep port_number;
-
-		struct drm_dp_enum_path_resources_ack_reply path_resources;
-		struct drm_dp_allocate_payload_ack_reply allocate_payload;
-		struct drm_dp_query_payload_ack_reply query_payload;
-
-		struct drm_dp_remote_dpcd_read_ack_reply remote_dpcd_read_ack;
-		struct drm_dp_remote_dpcd_write_ack_reply remote_dpcd_write_ack;
-		struct drm_dp_remote_dpcd_write_nak_reply remote_dpcd_write_nack;
-
-		struct drm_dp_remote_i2c_read_ack_reply remote_i2c_read_ack;
-		struct drm_dp_remote_i2c_read_nak_reply remote_i2c_read_nack;
-		struct drm_dp_remote_i2c_write_ack_reply remote_i2c_write_ack;
-
-		struct drm_dp_query_stream_enc_status_ack_reply enc_status;
-	} u;
-};
-
 /* msg is queued to be put into a slot */
 #define DRM_DP_SIDEBAND_TX_QUEUED 0
 /* msg has started transmitting on a slot - still on msgq */
