diff --git a/drivers/misc/mei/hdcp/mei_hdcp.c b/drivers/misc/mei/hdcp/mei_hdcp.c
index c681f6fab342..7efe3b65a986 100644
--- a/drivers/misc/mei/hdcp/mei_hdcp.c
+++ b/drivers/misc/mei/hdcp/mei_hdcp.c
@@ -39,6 +39,22 @@ static inline u8 mei_get_ddi_index(enum port port)
 	}
 }
 
+static inline u8 mei_get_tc_type(enum transcoder tc)
+{
+	switch (tc) {
+	case TRANSCODER_A ... TRANSCODER_D:
+		return (u8)(tc | 0x10);
+	case TRANSCODER_EDP:
+		return TC_EDP;
+	case TRANSCODER_DSI_0:
+		return TC_DSI0;
+	case TRANSCODER_DSI_1:
+		return TC_DSI1;
+	default:
+		return MEI_INVALID_TRANSCODER;
+	}
+}
+
 /**
  * mei_hdcp_initiate_session() - Initiate a Wired HDCP2.2 Tx Session in ME FW
  * @dev: device corresponding to the mei_cl_device
@@ -70,6 +86,7 @@ mei_hdcp_initiate_session(struct device *dev, struct hdcp_port_data *data,
 
 	session_init_in.port.integrated_port_type = data->port_type;
 	session_init_in.port.physical_port = mei_get_ddi_index(data->port);
+	session_init_in.port.attached_transcoder = mei_get_tc_type(data->tc);
 	session_init_in.protocol = data->protocol;
 
 	byte = mei_cldev_send(cldev, (u8 *)&session_init_in,
@@ -139,6 +156,7 @@ mei_hdcp_verify_receiver_cert_prepare_km(struct device *dev,
 
 	verify_rxcert_in.port.integrated_port_type = data->port_type;
 	verify_rxcert_in.port.physical_port = mei_get_ddi_index(data->port);
+	verify_rxcert_in.port.attached_transcoder = mei_get_tc_type(data->tc);
 
 	verify_rxcert_in.cert_rx = rx_cert->cert_rx;
 	memcpy(verify_rxcert_in.r_rx, &rx_cert->r_rx, HDCP_2_2_RRX_LEN);
@@ -209,6 +227,7 @@ mei_hdcp_verify_hprime(struct device *dev, struct hdcp_port_data *data,
 
 	send_hprime_in.port.integrated_port_type = data->port_type;
 	send_hprime_in.port.physical_port = mei_get_ddi_index(data->port);
+	send_hprime_in.port.attached_transcoder = mei_get_tc_type(data->tc);
 
 	memcpy(send_hprime_in.h_prime, rx_hprime->h_prime,
 	       HDCP_2_2_H_PRIME_LEN);
@@ -266,6 +285,7 @@ mei_hdcp_store_pairing_info(struct device *dev, struct hdcp_port_data *data,
 
 	pairing_info_in.port.integrated_port_type = data->port_type;
 	pairing_info_in.port.physical_port = mei_get_ddi_index(data->port);
+	pairing_info_in.port.attached_transcoder = mei_get_tc_type(data->tc);
 
 	memcpy(pairing_info_in.e_kh_km, pairing_info->e_kh_km,
 	       HDCP_2_2_E_KH_KM_LEN);
@@ -324,6 +344,7 @@ mei_hdcp_initiate_locality_check(struct device *dev,
 
 	lc_init_in.port.integrated_port_type = data->port_type;
 	lc_init_in.port.physical_port = mei_get_ddi_index(data->port);
+	lc_init_in.port.attached_transcoder = mei_get_tc_type(data->tc);
 
 	byte = mei_cldev_send(cldev, (u8 *)&lc_init_in, sizeof(lc_init_in));
 	if (byte < 0) {
@@ -379,6 +400,7 @@ mei_hdcp_verify_lprime(struct device *dev, struct hdcp_port_data *data,
 
 	verify_lprime_in.port.integrated_port_type = data->port_type;
 	verify_lprime_in.port.physical_port = mei_get_ddi_index(data->port);
+	verify_lprime_in.port.attached_transcoder = mei_get_tc_type(data->tc);
 
 	memcpy(verify_lprime_in.l_prime, rx_lprime->l_prime,
 	       HDCP_2_2_L_PRIME_LEN);
@@ -436,6 +458,7 @@ static int mei_hdcp_get_session_key(struct device *dev,
 
 	get_skey_in.port.integrated_port_type = data->port_type;
 	get_skey_in.port.physical_port = mei_get_ddi_index(data->port);
+	get_skey_in.port.attached_transcoder = mei_get_tc_type(data->tc);
 
 	byte = mei_cldev_send(cldev, (u8 *)&get_skey_in, sizeof(get_skey_in));
 	if (byte < 0) {
@@ -500,6 +523,7 @@ mei_hdcp_repeater_check_flow_prepare_ack(struct device *dev,
 
 	verify_repeater_in.port.integrated_port_type = data->port_type;
 	verify_repeater_in.port.physical_port = mei_get_ddi_index(data->port);
+	verify_repeater_in.port.attached_transcoder = mei_get_tc_type(data->tc);
 
 	memcpy(verify_repeater_in.rx_info, rep_topology->rx_info,
 	       HDCP_2_2_RXINFO_LEN);
@@ -570,6 +594,7 @@ static int mei_hdcp_verify_mprime(struct device *dev,
 
 	verify_mprime_in.port.integrated_port_type = data->port_type;
 	verify_mprime_in.port.physical_port = mei_get_ddi_index(data->port);
+	verify_mprime_in.port.attached_transcoder = mei_get_tc_type(data->tc);
 
 	memcpy(verify_mprime_in.m_prime, stream_ready->m_prime,
 	       HDCP_2_2_MPRIME_LEN);
@@ -631,6 +656,7 @@ static int mei_hdcp_enable_authentication(struct device *dev,
 
 	enable_auth_in.port.integrated_port_type = data->port_type;
 	enable_auth_in.port.physical_port = mei_get_ddi_index(data->port);
+	enable_auth_in.port.attached_transcoder = mei_get_tc_type(data->tc);
 	enable_auth_in.stream_type = data->streams[0].stream_type;
 
 	byte = mei_cldev_send(cldev, (u8 *)&enable_auth_in,
@@ -685,6 +711,7 @@ mei_hdcp_close_session(struct device *dev, struct hdcp_port_data *data)
 
 	session_close_in.port.integrated_port_type = data->port_type;
 	session_close_in.port.physical_port = mei_get_ddi_index(data->port);
+	session_close_in.port.attached_transcoder = mei_get_tc_type(data->tc);
 
 	byte = mei_cldev_send(cldev, (u8 *)&session_close_in,
 			      sizeof(session_close_in));
diff --git a/drivers/misc/mei/hdcp/mei_hdcp.h b/drivers/misc/mei/hdcp/mei_hdcp.h
index e4b1cd54c853..89e2f99ff60a 100644
--- a/drivers/misc/mei/hdcp/mei_hdcp.h
+++ b/drivers/misc/mei/hdcp/mei_hdcp.h
@@ -184,8 +184,10 @@ struct hdcp_cmd_no_data {
 /* Uniquely identifies the hdcp port being addressed for a given command. */
 struct hdcp_port_id {
 	u8	integrated_port_type;
+	/* Used until Gen11.5. Must be zero for Gen11.5+ */
 	u8	physical_port;
-	u16	reserved;
+	u8	attached_transcoder;
+	u8	reserved;
 } __packed;
 
 /*
@@ -374,4 +376,15 @@ enum mei_fw_ddi {
 	MEI_DDI_A = 7,
 	MEI_DDI_RANGE_END = MEI_DDI_A,
 };
+
+enum mei_fw_tc {
+	MEI_INVALID_TRANSCODER = 0x00,	// Invalid transcoder type
+	TC_EDP,				// Transcoder for eDP
+	TC_DSI0,			// Transcoder for DSI0
+	TC_DSI1,			// Transcoder for DSI1
+	TC_A = 0x10,			// Transcoder TCA
+	TC_B,				// Transcoder TCB
+	TC_C,				// Transcoder TCC
+	TC_D				// Transcoder TCD
+};
 #endif /* __MEI_HDCP_H__ */
diff --git a/include/drm/i915_mei_hdcp_interface.h b/include/drm/i915_mei_hdcp_interface.h
index 8c344255146a..dc0de63ce0cb 100644
--- a/include/drm/i915_mei_hdcp_interface.h
+++ b/include/drm/i915_mei_hdcp_interface.h
@@ -45,6 +45,7 @@ enum hdcp_wired_protocol {
 /**
  * struct hdcp_port_data - intel specific HDCP port data
  * @port: port index as per I915
+ * @tc: transcoder index as per I915
  * @port_type: HDCP port type as per ME FW classification
  * @protocol: HDCP adaptation as per ME FW
  * @k: No of streams transmitted on a port. Only on DP MST this is != 1
@@ -57,6 +58,7 @@ enum hdcp_wired_protocol {
  */
 struct hdcp_port_data {
 	enum port port;
+	enum transcoder tc;
 	u8 port_type;
 	u8 protocol;
 	u16 k;
