drm/amd/display: Add execution and transition states for HDCP2.2

The module works like a state machine

                                    +-------------+
                            ------> | Execution.c | ------
                            |       +-------------+       |
                            |                             V
    +----+              +--------+                 +--------------+
    | DM |    ----->    | Hdcp.c |  <------------  | Transition.c |
    +----+    <-----    +--------+                 +--------------+

This patch adds the execution and transition files for 2.2
Signed-off-by: Bhawanpreet Lakha <Bhawanpreet.Lakha@amd.com>
Reviewed-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/display/modules/hdcp/Makefile

@@ -24,7 +24,8 @@
 #
 
 HDCP = hdcp_ddc.o hdcp_log.o hdcp_psp.o hdcp.o \
-		hdcp1_execution.o hdcp1_transition.o
+		hdcp1_execution.o hdcp1_transition.o \
+		hdcp2_execution.o hdcp2_transition.o
 
 AMD_DAL_HDCP = $(addprefix $(AMDDALPATH)/modules/hdcp/,$(HDCP))
 #$(info ************  DAL-HDCP_MAKEFILE ************)

drivers/gpu/drm/amd/display/modules/hdcp/hdcp.c

@@ -37,24 +37,52 @@ static void push_error_status(struct mod_hdcp *hdcp,
 		HDCP_ERROR_TRACE(hdcp, status);
 	}
 
+	if (is_hdcp1(hdcp)) {
 		hdcp->connection.hdcp1_retry_count++;
+	} else if (is_hdcp2(hdcp)) {
+		hdcp->connection.hdcp2_retry_count++;
+	}
 }
 
 static uint8_t is_cp_desired_hdcp1(struct mod_hdcp *hdcp)
 {
-	int i, display_enabled = 0;
+	int i, is_auth_needed = 0;
 
-	/* if all displays on the link are disabled, hdcp is not desired */
+	/* if all displays on the link don't need authentication,
+	 * hdcp is not desired
+	 */
 	for (i = 0; i < MAX_NUM_OF_DISPLAYS; i++) {
 		if (hdcp->connection.displays[i].state != MOD_HDCP_DISPLAY_INACTIVE &&
 				!hdcp->connection.displays[i].adjust.disable) {
-			display_enabled = 1;
+			is_auth_needed = 1;
 			break;
 		}
 	}
 
 	return (hdcp->connection.hdcp1_retry_count < MAX_NUM_OF_ATTEMPTS) &&
-			display_enabled && !hdcp->connection.link.adjust.hdcp1.disable;
+			is_auth_needed &&
+			!hdcp->connection.link.adjust.hdcp1.disable;
+}
+
+static uint8_t is_cp_desired_hdcp2(struct mod_hdcp *hdcp)
+{
+	int i, is_auth_needed = 0;
+
+	/* if all displays on the link don't need authentication,
+	 * hdcp is not desired
+	 */
+	for (i = 0; i < MAX_NUM_OF_DISPLAYS; i++) {
+		if (hdcp->connection.displays[i].state != MOD_HDCP_DISPLAY_INACTIVE &&
+				!hdcp->connection.displays[i].adjust.disable) {
+			is_auth_needed = 1;
+			break;
+		}
+	}
+
+	return (hdcp->connection.hdcp2_retry_count < MAX_NUM_OF_ATTEMPTS) &&
+			is_auth_needed &&
+			!hdcp->connection.link.adjust.hdcp2.disable &&
+			!hdcp->connection.is_hdcp2_revoked;
 }
 
 static enum mod_hdcp_status execution(struct mod_hdcp *hdcp,
@@ -82,6 +110,11 @@ static enum mod_hdcp_status execution(struct mod_hdcp *hdcp,
 	} else if (is_in_hdcp1_dp_states(hdcp)) {
 		status = mod_hdcp_hdcp1_dp_execution(hdcp,
 				event_ctx, &input->hdcp1);
+	} else if (is_in_hdcp2_states(hdcp)) {
+		status = mod_hdcp_hdcp2_execution(hdcp, event_ctx, &input->hdcp2);
+	} else if (is_in_hdcp2_dp_states(hdcp)) {
+		status = mod_hdcp_hdcp2_dp_execution(hdcp,
+				event_ctx, &input->hdcp2);
 	}
 out:
 	return status;
@@ -99,7 +132,10 @@ static enum mod_hdcp_status transition(struct mod_hdcp *hdcp,
 
 	if (is_in_initialized_state(hdcp)) {
 		if (is_dp_hdcp(hdcp))
-			if (is_cp_desired_hdcp1(hdcp)) {
+			if (is_cp_desired_hdcp2(hdcp)) {
+				callback_in_ms(0, output);
+				set_state_id(hdcp, output, D2_A0_DETERMINE_RX_HDCP_CAPABLE);
+			} else if (is_cp_desired_hdcp1(hdcp)) {
 				callback_in_ms(0, output);
 				set_state_id(hdcp, output, D1_A0_DETERMINE_RX_HDCP_CAPABLE);
 			} else {
@@ -107,7 +143,10 @@ static enum mod_hdcp_status transition(struct mod_hdcp *hdcp,
 				set_state_id(hdcp, output, HDCP_CP_NOT_DESIRED);
 			}
 		else if (is_hdmi_dvi_sl_hdcp(hdcp))
-			if (is_cp_desired_hdcp1(hdcp)) {
+			if (is_cp_desired_hdcp2(hdcp)) {
+				callback_in_ms(0, output);
+				set_state_id(hdcp, output, H2_A0_KNOWN_HDCP2_CAPABLE_RX);
+			} else if (is_cp_desired_hdcp1(hdcp)) {
 				callback_in_ms(0, output);
 				set_state_id(hdcp, output, H1_A0_WAIT_FOR_ACTIVE_RX);
 			} else {
@@ -126,6 +165,12 @@ static enum mod_hdcp_status transition(struct mod_hdcp *hdcp,
 	} else if (is_in_hdcp1_dp_states(hdcp)) {
 		status = mod_hdcp_hdcp1_dp_transition(hdcp,
 				event_ctx, &input->hdcp1, output);
+	} else if (is_in_hdcp2_states(hdcp)) {
+		status = mod_hdcp_hdcp2_transition(hdcp,
+				event_ctx, &input->hdcp2, output);
+	} else if (is_in_hdcp2_dp_states(hdcp)) {
+		status = mod_hdcp_hdcp2_dp_transition(hdcp,
+				event_ctx, &input->hdcp2, output);
 	} else {
 		status = MOD_HDCP_STATUS_INVALID_STATE;
 	}
@@ -139,9 +184,13 @@ static enum mod_hdcp_status reset_authentication(struct mod_hdcp *hdcp,
 	enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS;
 
 	if (is_hdcp1(hdcp)) {
-		if (hdcp->auth.trans_input.hdcp1.create_session != UNKNOWN)
+		if (hdcp->auth.trans_input.hdcp1.create_session != UNKNOWN) {
+			/* TODO - update psp to unify create session failure
+			 * recovery between hdcp1 and 2.
+			 */
 			mod_hdcp_hdcp1_destroy_session(hdcp);
 
+		}
 		if (hdcp->auth.trans_input.hdcp1.add_topology == PASS) {
 			status = mod_hdcp_remove_display_topology(hdcp);
 			if (status != MOD_HDCP_STATUS_SUCCESS) {
@@ -154,6 +203,27 @@ static enum mod_hdcp_status reset_authentication(struct mod_hdcp *hdcp,
 		memset(&hdcp->auth, 0, sizeof(struct mod_hdcp_authentication));
 		memset(&hdcp->state, 0, sizeof(struct mod_hdcp_state));
 		set_state_id(hdcp, output, HDCP_INITIALIZED);
+	} else if (is_hdcp2(hdcp)) {
+		if (hdcp->auth.trans_input.hdcp2.create_session == PASS) {
+			status = mod_hdcp_hdcp2_destroy_session(hdcp);
+			if (status != MOD_HDCP_STATUS_SUCCESS) {
+				output->callback_needed = 0;
+				output->watchdog_timer_needed = 0;
+				goto out;
+			}
+		}
+		if (hdcp->auth.trans_input.hdcp2.add_topology == PASS) {
+			status = mod_hdcp_remove_display_topology(hdcp);
+			if (status != MOD_HDCP_STATUS_SUCCESS) {
+				output->callback_needed = 0;
+				output->watchdog_timer_needed = 0;
+				goto out;
+			}
+		}
+		HDCP_TOP_RESET_AUTH_TRACE(hdcp);
+		memset(&hdcp->auth, 0, sizeof(struct mod_hdcp_authentication));
+		memset(&hdcp->state, 0, sizeof(struct mod_hdcp_state));
+		set_state_id(hdcp, output, HDCP_INITIALIZED);
 	} else if (is_in_cp_not_desired_state(hdcp)) {
 		status = mod_hdcp_remove_display_topology(hdcp);
 		if (status != MOD_HDCP_STATUS_SUCCESS) {

drivers/gpu/drm/amd/display/modules/hdcp/hdcp.h

@@ -44,11 +44,13 @@
 #define BINFO_MAX_DEVS_EXCEEDED_MASK_DP			0x0080
 #define BINFO_MAX_CASCADE_EXCEEDED_MASK_DP		0x0800
 
+#define VERSION_HDCP2_MASK				0x04
 #define RXSTATUS_MSG_SIZE_MASK				0x03FF
 #define RXSTATUS_READY_MASK				0x0400
 #define RXSTATUS_REAUTH_REQUEST_MASK			0x0800
 #define RXIDLIST_DEVICE_COUNT_LOWER_MASK		0xf0
 #define RXIDLIST_DEVICE_COUNT_UPPER_MASK		0x01
+#define RXCAPS_BYTE2_HDCP2_VERSION_DP			0x02
 #define RXCAPS_BYTE0_HDCP_CAPABLE_MASK_DP		0x02
 #define RXSTATUS_READY_MASK_DP				0x0001
 #define RXSTATUS_H_P_AVAILABLE_MASK_DP			0x0002
@@ -92,8 +94,52 @@ struct mod_hdcp_transition_input_hdcp1 {
 	uint8_t stream_encryption_dp;
 };
 
+struct mod_hdcp_transition_input_hdcp2 {
+	uint8_t hdcp2version_read;
+	uint8_t hdcp2_capable_check;
+	uint8_t add_topology;
+	uint8_t create_session;
+	uint8_t ake_init_prepare;
+	uint8_t ake_init_write;
+	uint8_t rxstatus_read;
+	uint8_t ake_cert_available;
+	uint8_t ake_cert_read;
+	uint8_t ake_cert_validation;
+	uint8_t stored_km_write;
+	uint8_t no_stored_km_write;
+	uint8_t h_prime_available;
+	uint8_t h_prime_read;
+	uint8_t pairing_available;
+	uint8_t pairing_info_read;
+	uint8_t h_prime_validation;
+	uint8_t lc_init_prepare;
+	uint8_t lc_init_write;
+	uint8_t l_prime_available_poll;
+	uint8_t l_prime_read;
+	uint8_t l_prime_validation;
+	uint8_t eks_prepare;
+	uint8_t eks_write;
+	uint8_t enable_encryption;
+	uint8_t reauth_request_check;
+	uint8_t rx_id_list_read;
+	uint8_t device_count_check;
+	uint8_t rx_id_list_validation;
+	uint8_t repeater_auth_ack_write;
+	uint8_t prepare_stream_manage;
+	uint8_t stream_manage_write;
+	uint8_t stream_ready_available;
+	uint8_t stream_ready_read;
+	uint8_t stream_ready_validation;
+
+	uint8_t rx_caps_read_dp;
+	uint8_t content_stream_type_write;
+	uint8_t link_integrity_check_dp;
+	uint8_t stream_encryption_dp;
+};
+
 union mod_hdcp_transition_input {
 	struct mod_hdcp_transition_input_hdcp1 hdcp1;
+	struct mod_hdcp_transition_input_hdcp2 hdcp2;
 };
 
 struct mod_hdcp_message_hdcp1 {
@@ -150,8 +196,10 @@ struct mod_hdcp_connection {
 	struct mod_hdcp_display displays[MAX_NUM_OF_DISPLAYS];
 	uint8_t is_repeater;
 	uint8_t is_km_stored;
+	uint8_t is_hdcp2_revoked;
 	struct mod_hdcp_trace trace;
 	uint8_t hdcp1_retry_count;
+	uint8_t hdcp2_retry_count;
 };
 
 /* contains values per authentication cycle */
@@ -219,6 +267,50 @@ enum mod_hdcp_hdcp1_dp_state_id {
 	HDCP1_DP_STATE_END = D1_A7_READ_KSV_LIST,
 };
 
+enum mod_hdcp_hdcp2_state_id {
+	HDCP2_STATE_START = HDCP1_DP_STATE_END,
+	H2_A0_KNOWN_HDCP2_CAPABLE_RX,
+	H2_A1_SEND_AKE_INIT,
+	H2_A1_VALIDATE_AKE_CERT,
+	H2_A1_SEND_NO_STORED_KM,
+	H2_A1_READ_H_PRIME,
+	H2_A1_READ_PAIRING_INFO_AND_VALIDATE_H_PRIME,
+	H2_A1_SEND_STORED_KM,
+	H2_A1_VALIDATE_H_PRIME,
+	H2_A2_LOCALITY_CHECK,
+	H2_A3_EXCHANGE_KS_AND_TEST_FOR_REPEATER,
+	H2_ENABLE_ENCRYPTION,
+	H2_A5_AUTHENTICATED,
+	H2_A6_WAIT_FOR_RX_ID_LIST,
+	H2_A78_VERIFY_RX_ID_LIST_AND_SEND_ACK,
+	H2_A9_SEND_STREAM_MANAGEMENT,
+	H2_A9_VALIDATE_STREAM_READY,
+	HDCP2_STATE_END = H2_A9_VALIDATE_STREAM_READY,
+};
+
+enum mod_hdcp_hdcp2_dp_state_id {
+	HDCP2_DP_STATE_START = HDCP2_STATE_END,
+	D2_A0_DETERMINE_RX_HDCP_CAPABLE,
+	D2_A1_SEND_AKE_INIT,
+	D2_A1_VALIDATE_AKE_CERT,
+	D2_A1_SEND_NO_STORED_KM,
+	D2_A1_READ_H_PRIME,
+	D2_A1_READ_PAIRING_INFO_AND_VALIDATE_H_PRIME,
+	D2_A1_SEND_STORED_KM,
+	D2_A1_VALIDATE_H_PRIME,
+	D2_A2_LOCALITY_CHECK,
+	D2_A34_EXCHANGE_KS_AND_TEST_FOR_REPEATER,
+	D2_SEND_CONTENT_STREAM_TYPE,
+	D2_ENABLE_ENCRYPTION,
+	D2_A5_AUTHENTICATED,
+	D2_A6_WAIT_FOR_RX_ID_LIST,
+	D2_A78_VERIFY_RX_ID_LIST_AND_SEND_ACK,
+	D2_A9_SEND_STREAM_MANAGEMENT,
+	D2_A9_VALIDATE_STREAM_READY,
+	HDCP2_DP_STATE_END = D2_A9_VALIDATE_STREAM_READY,
+	HDCP_STATE_END = HDCP2_DP_STATE_END,
+};
+
 /* hdcp1 executions and transitions */
 typedef enum mod_hdcp_status (*mod_hdcp_action)(struct mod_hdcp *hdcp);
 uint8_t mod_hdcp_execute_and_set(
@@ -239,6 +331,22 @@ enum mod_hdcp_status mod_hdcp_hdcp1_dp_transition(struct mod_hdcp *hdcp,
 	struct mod_hdcp_transition_input_hdcp1 *input,
 	struct mod_hdcp_output *output);
 
+/* hdcp2 executions and transitions */
+enum mod_hdcp_status mod_hdcp_hdcp2_execution(struct mod_hdcp *hdcp,
+	struct mod_hdcp_event_context *event_ctx,
+	struct mod_hdcp_transition_input_hdcp2 *input);
+enum mod_hdcp_status mod_hdcp_hdcp2_dp_execution(struct mod_hdcp *hdcp,
+	struct mod_hdcp_event_context *event_ctx,
+	struct mod_hdcp_transition_input_hdcp2 *input);
+enum mod_hdcp_status mod_hdcp_hdcp2_transition(struct mod_hdcp *hdcp,
+	struct mod_hdcp_event_context *event_ctx,
+	struct mod_hdcp_transition_input_hdcp2 *input,
+	struct mod_hdcp_output *output);
+enum mod_hdcp_status mod_hdcp_hdcp2_dp_transition(struct mod_hdcp *hdcp,
+	struct mod_hdcp_event_context *event_ctx,
+	struct mod_hdcp_transition_input_hdcp2 *input,
+	struct mod_hdcp_output *output);
+
 /* log functions */
 void mod_hdcp_dump_binary_message(uint8_t *msg, uint32_t msg_size,
 		uint8_t *buf, uint32_t buf_size);
@@ -289,6 +397,7 @@ enum mod_hdcp_status mod_hdcp_read_binfo(struct mod_hdcp *hdcp);
 enum mod_hdcp_status mod_hdcp_write_aksv(struct mod_hdcp *hdcp);
 enum mod_hdcp_status mod_hdcp_write_ainfo(struct mod_hdcp *hdcp);
 enum mod_hdcp_status mod_hdcp_write_an(struct mod_hdcp *hdcp);
+enum mod_hdcp_status mod_hdcp_read_hdcp2version(struct mod_hdcp *hdcp);
 enum mod_hdcp_status mod_hdcp_read_rxcaps(struct mod_hdcp *hdcp);
 enum mod_hdcp_status mod_hdcp_read_rxstatus(struct mod_hdcp *hdcp);
 enum mod_hdcp_status mod_hdcp_read_ake_cert(struct mod_hdcp *hdcp);
@@ -352,11 +461,28 @@ static inline uint8_t is_in_hdcp1_dp_states(struct mod_hdcp *hdcp)
 			current_state(hdcp) <= HDCP1_DP_STATE_END);
 }
 
+static inline uint8_t is_in_hdcp2_states(struct mod_hdcp *hdcp)
+{
+	return (current_state(hdcp) > HDCP2_STATE_START &&
+			current_state(hdcp) <= HDCP2_STATE_END);
+}
+
+static inline uint8_t is_in_hdcp2_dp_states(struct mod_hdcp *hdcp)
+{
+	return (current_state(hdcp) > HDCP2_DP_STATE_START &&
+			current_state(hdcp) <= HDCP2_DP_STATE_END);
+}
+
 static inline uint8_t is_hdcp1(struct mod_hdcp *hdcp)
 {
 	return (is_in_hdcp1_states(hdcp) || is_in_hdcp1_dp_states(hdcp));
 }
 
+static inline uint8_t is_hdcp2(struct mod_hdcp *hdcp)
+{
+	return (is_in_hdcp2_states(hdcp) || is_in_hdcp2_dp_states(hdcp));
+}
+
 static inline uint8_t is_in_cp_not_desired_state(struct mod_hdcp *hdcp)
 {
 	return current_state(hdcp) == HDCP_CP_NOT_DESIRED;
@@ -481,6 +607,7 @@ static inline struct mod_hdcp_display *get_empty_display_container(
 static inline void reset_retry_counts(struct mod_hdcp *hdcp)
 {
 	hdcp->connection.hdcp1_retry_count = 0;
+	hdcp->connection.hdcp2_retry_count = 0;
 }
 
 #endif /* HDCP_H_ */

drivers/gpu/drm/amd/display/modules/hdcp/hdcp2_execution.c

+/*
+ * Copyright 2018 Advanced Micro Devices, Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * Authors: AMD
+ *
+ */
+
+#include "hdcp.h"
+
+static inline enum mod_hdcp_status check_receiver_id_list_ready(struct mod_hdcp *hdcp)
+{
+	uint8_t is_ready = 0;
+
+	if (is_dp_hdcp(hdcp))
+		is_ready = (hdcp->auth.msg.hdcp2.rxstatus & RXSTATUS_READY_MASK_DP) ? 1 : 0;
+	else
+		is_ready = ((hdcp->auth.msg.hdcp2.rxstatus & RXSTATUS_READY_MASK) &&
+				(hdcp->auth.msg.hdcp2.rxstatus & RXSTATUS_MSG_SIZE_MASK)) ? 1 : 0;
+	return is_ready ? MOD_HDCP_STATUS_SUCCESS :
+			MOD_HDCP_STATUS_HDCP2_RX_ID_LIST_NOT_READY;
+}
+
+static inline enum mod_hdcp_status check_hdcp2_capable(struct mod_hdcp *hdcp)
+{
+	enum mod_hdcp_status status;
+
+	if (is_dp_hdcp(hdcp))
+		status = ((hdcp->auth.msg.hdcp2.rxcaps_dp[2] &
+						RXCAPS_BYTE0_HDCP_CAPABLE_MASK_DP) &&
+				(hdcp->auth.msg.hdcp2.rxcaps_dp[0] ==
+						RXCAPS_BYTE2_HDCP2_VERSION_DP)) ?
+				MOD_HDCP_STATUS_SUCCESS :
+				MOD_HDCP_STATUS_HDCP2_NOT_CAPABLE;
+	else
+		status = (hdcp->auth.msg.hdcp2.hdcp2version_hdmi & VERSION_HDCP2_MASK) ?
+				MOD_HDCP_STATUS_SUCCESS :
+				MOD_HDCP_STATUS_HDCP2_NOT_CAPABLE;
+	return status;
+}
+
+static inline enum mod_hdcp_status check_reauthentication_request(
+		struct mod_hdcp *hdcp)
+{
+	uint8_t ret = 0;
+
+	if (is_dp_hdcp(hdcp))
+		ret = (hdcp->auth.msg.hdcp2.rxstatus &
+				RXSTATUS_REAUTH_REQUEST_MASK_DP) ?
+				MOD_HDCP_STATUS_HDCP2_REAUTH_REQUEST :
+				MOD_HDCP_STATUS_SUCCESS;
+	else
+		ret = (hdcp->auth.msg.hdcp2.rxstatus & RXSTATUS_REAUTH_REQUEST_MASK) ?
+				MOD_HDCP_STATUS_HDCP2_REAUTH_REQUEST :
+				MOD_HDCP_STATUS_SUCCESS;
+	return ret;
+}
+
+static inline enum mod_hdcp_status check_link_integrity_failure_dp(
+		struct mod_hdcp *hdcp)
+{
+	return (hdcp->auth.msg.hdcp2.rxstatus &
+			RXSTATUS_LINK_INTEGRITY_FAILURE_MASK_DP) ?
+			MOD_HDCP_STATUS_HDCP2_REAUTH_LINK_INTEGRITY_FAILURE :
+			MOD_HDCP_STATUS_SUCCESS;
+}
+
+static enum mod_hdcp_status check_ake_cert_available(struct mod_hdcp *hdcp)
+{
+	enum mod_hdcp_status status;
+	uint16_t size;
+
+	if (is_dp_hdcp(hdcp)) {
+		status = MOD_HDCP_STATUS_SUCCESS;
+	} else {
+		status = mod_hdcp_read_rxstatus(hdcp);
+		if (status == MOD_HDCP_STATUS_SUCCESS) {
+			size = hdcp->auth.msg.hdcp2.rxstatus & RXSTATUS_MSG_SIZE_MASK;
+			status = (size == sizeof(hdcp->auth.msg.hdcp2.ake_cert)) ?
+					MOD_HDCP_STATUS_SUCCESS :
+					MOD_HDCP_STATUS_HDCP2_AKE_CERT_PENDING;
+		}
+	}
+	return status;
+}
+
+static enum mod_hdcp_status check_h_prime_available(struct mod_hdcp *hdcp)
+{
+	enum mod_hdcp_status status;
+	uint8_t size;
+
+	status = mod_hdcp_read_rxstatus(hdcp);
+	if (status != MOD_HDCP_STATUS_SUCCESS)
+		goto out;
+
+	if (is_dp_hdcp(hdcp)) {
+		status = (hdcp->auth.msg.hdcp2.rxstatus & RXSTATUS_H_P_AVAILABLE_MASK_DP) ?
+				MOD_HDCP_STATUS_SUCCESS :
+				MOD_HDCP_STATUS_HDCP2_H_PRIME_PENDING;
+	} else {
+		size = hdcp->auth.msg.hdcp2.rxstatus & RXSTATUS_MSG_SIZE_MASK;
+		status = (size == sizeof(hdcp->auth.msg.hdcp2.ake_h_prime)) ?
+				MOD_HDCP_STATUS_SUCCESS :
+				MOD_HDCP_STATUS_HDCP2_H_PRIME_PENDING;
+	}
+out:
+	return status;
+}
+
+static enum mod_hdcp_status check_pairing_info_available(struct mod_hdcp *hdcp)
+{
+	enum mod_hdcp_status status;
+	uint8_t size;
+
+	status = mod_hdcp_read_rxstatus(hdcp);
+	if (status != MOD_HDCP_STATUS_SUCCESS)
+		goto out;
+
+	if (is_dp_hdcp(hdcp)) {
+		status = (hdcp->auth.msg.hdcp2.rxstatus & RXSTATUS_PAIRING_AVAILABLE_MASK_DP) ?
+				MOD_HDCP_STATUS_SUCCESS :
+				MOD_HDCP_STATUS_HDCP2_PAIRING_INFO_PENDING;
+	} else {
+		size = hdcp->auth.msg.hdcp2.rxstatus & RXSTATUS_MSG_SIZE_MASK;
+		status = (size == sizeof(hdcp->auth.msg.hdcp2.ake_pairing_info)) ?
+				MOD_HDCP_STATUS_SUCCESS :
+				MOD_HDCP_STATUS_HDCP2_PAIRING_INFO_PENDING;
+	}
+out:
+	return status;
+}
+
+static enum mod_hdcp_status poll_l_prime_available(struct mod_hdcp *hdcp)
+{
+	enum mod_hdcp_status status;
+	uint8_t size;
+	uint16_t max_wait = 20000; // units of us
+	uint16_t num_polls = 5;
+	uint16_t wait_time = max_wait / num_polls;
+
+	if (is_dp_hdcp(hdcp))
+		status = MOD_HDCP_STATUS_INVALID_OPERATION;
+	else
+		for (; num_polls; num_polls--) {
+			udelay(wait_time);
+
+			status = mod_hdcp_read_rxstatus(hdcp);
+			if (status != MOD_HDCP_STATUS_SUCCESS)
+				break;
+
+			size = hdcp->auth.msg.hdcp2.rxstatus & RXSTATUS_MSG_SIZE_MASK;
+			status = (size == sizeof(hdcp->auth.msg.hdcp2.lc_l_prime)) ?
+					MOD_HDCP_STATUS_SUCCESS :
+					MOD_HDCP_STATUS_HDCP2_L_PRIME_PENDING;
+			if (status == MOD_HDCP_STATUS_SUCCESS)
+				break;
+		}
+	return status;
+}
+
+static enum mod_hdcp_status check_stream_ready_available(struct mod_hdcp *hdcp)
+{
+	enum mod_hdcp_status status;
+	uint8_t size;
+
+	if (is_dp_hdcp(hdcp)) {
+		status = MOD_HDCP_STATUS_INVALID_OPERATION;
+	} else {
+		status = mod_hdcp_read_rxstatus(hdcp);
+		if (status != MOD_HDCP_STATUS_SUCCESS)
+			goto out;
+		size = hdcp->auth.msg.hdcp2.rxstatus & RXSTATUS_MSG_SIZE_MASK;
+		status = (size == sizeof(hdcp->auth.msg.hdcp2.repeater_auth_stream_ready)) ?
+				MOD_HDCP_STATUS_SUCCESS :
+				MOD_HDCP_STATUS_HDCP2_STREAM_READY_PENDING;
+	}
+out:
+	return status;
+}
+
+static inline uint8_t get_device_count(struct mod_hdcp *hdcp)
+{
+	return ((hdcp->auth.msg.hdcp2.rx_id_list[2] & RXIDLIST_DEVICE_COUNT_LOWER_MASK) >> 4) +
+		((hdcp->auth.msg.hdcp2.rx_id_list[1] & RXIDLIST_DEVICE_COUNT_UPPER_MASK) << 4);
+}
+
+static enum mod_hdcp_status check_device_count(struct mod_hdcp *hdcp)
+{
+	/* device count must be greater than or equal to tracked hdcp displays */
+	return (get_device_count(hdcp) < get_added_display_count(hdcp)) ?
+			MOD_HDCP_STATUS_HDCP2_DEVICE_COUNT_MISMATCH_FAILURE :
+			MOD_HDCP_STATUS_SUCCESS;
+}
+
+static uint8_t process_rxstatus(struct mod_hdcp *hdcp,
+		struct mod_hdcp_event_context *event_ctx,
+		struct mod_hdcp_transition_input_hdcp2 *input,
+		enum mod_hdcp_status *status)
+{
+	if (!mod_hdcp_execute_and_set(mod_hdcp_read_rxstatus,
+			&input->rxstatus_read, status,
+			hdcp, "rxstatus_read"))
+		goto out;
+	if (!mod_hdcp_execute_and_set(check_reauthentication_request,
+			&input->reauth_request_check, status,
+			hdcp, "reauth_request_check"))
+		goto out;
+	if (is_dp_hdcp(hdcp)) {
+		if (!mod_hdcp_execute_and_set(check_link_integrity_failure_dp,
+				&input->link_integrity_check_dp, status,
+				hdcp, "link_integrity_check_dp"))
+			goto out;
+	}
+	if (hdcp->connection.is_repeater)
+		if (check_receiver_id_list_ready(hdcp) ==
+				MOD_HDCP_STATUS_SUCCESS) {
+			HDCP_INPUT_PASS_TRACE(hdcp, "rx_id_list_ready");
+			event_ctx->rx_id_list_ready = 1;
+			if (is_dp_hdcp(hdcp))
+				hdcp->auth.msg.hdcp2.rx_id_list_size =
+						sizeof(hdcp->auth.msg.hdcp2.rx_id_list);
+			else
+				hdcp->auth.msg.hdcp2.rx_id_list_size =
+						hdcp->auth.msg.hdcp2.rxstatus & 0x3FF;
+		}
+out:
+	return (*status == MOD_HDCP_STATUS_SUCCESS);
+}
+
+static enum mod_hdcp_status known_hdcp2_capable_rx(struct mod_hdcp *hdcp,
+		struct mod_hdcp_event_context *event_ctx,
+		struct mod_hdcp_transition_input_hdcp2 *input)
+{
+	enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS;
+
+	if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK) {
+		event_ctx->unexpected_event = 1;
+		goto out;
+	}
+	if (!mod_hdcp_execute_and_set(mod_hdcp_read_hdcp2version,
+			&input->hdcp2version_read, &status,
+			hdcp, "hdcp2version_read"))
+		goto out;
+	if (!mod_hdcp_execute_and_set(check_hdcp2_capable,
+			&input->hdcp2_capable_check, &status,
+			hdcp, "hdcp2_capable"))
+		goto out;
+out:
+	return status;
+}
+
+static enum mod_hdcp_status send_ake_init(struct mod_hdcp *hdcp,
+		struct mod_hdcp_event_context *event_ctx,
+		struct mod_hdcp_transition_input_hdcp2 *input)
+{
+	enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS;
+
+	if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK) {
+		event_ctx->unexpected_event = 1;
+		goto out;
+	}
+	if (!mod_hdcp_execute_and_set(mod_hdcp_add_display_topology,
+			&input->add_topology, &status,
+			hdcp, "add_topology"))
+		goto out;
+	if (!mod_hdcp_execute_and_set(mod_hdcp_hdcp2_create_session,
+			&input->create_session, &status,
+			hdcp, "create_session"))
+		goto out;
+	if (!mod_hdcp_execute_and_set(mod_hdcp_hdcp2_prepare_ake_init,
+			&input->ake_init_prepare, &status,
+			hdcp, "ake_init_prepare"))
+		goto out;
+	if (!mod_hdcp_execute_and_set(mod_hdcp_write_ake_init,
+			&input->ake_init_write, &status,
+			hdcp, "ake_init_write"))
+		goto out;
+out:
+	return status;
+}
+
+static enum mod_hdcp_status validate_ake_cert(struct mod_hdcp *hdcp,
+		struct mod_hdcp_event_context *event_ctx,
+		struct mod_hdcp_transition_input_hdcp2 *input)
+{
+	enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS;
+
+
+	if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK &&
+			event_ctx->event != MOD_HDCP_EVENT_WATCHDOG_TIMEOUT) {
+		event_ctx->unexpected_event = 1;
+		goto out;
+	}
+
+	if (is_hdmi_dvi_sl_hdcp(hdcp))
+		if (!mod_hdcp_execute_and_set(check_ake_cert_available,
+				&input->ake_cert_available, &status,
+				hdcp, "ake_cert_available"))
+			goto out;
+	if (!mod_hdcp_execute_and_set(mod_hdcp_read_ake_cert,
+			&input->ake_cert_read, &status,
+			hdcp, "ake_cert_read"))
+		goto out;
+	if (!mod_hdcp_execute_and_set(mod_hdcp_hdcp2_validate_ake_cert,
+			&input->ake_cert_validation, &status,
+			hdcp, "ake_cert_validation"))
+		goto out;
+out:
+	return status;
+}
+
+static enum mod_hdcp_status send_no_stored_km(struct mod_hdcp *hdcp,
+		struct mod_hdcp_event_context *event_ctx,
+		struct mod_hdcp_transition_input_hdcp2 *input)
+{
+	enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS;
+
+	if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK) {
+		event_ctx->unexpected_event = 1;
+		goto out;
+	}
+
+	if (!mod_hdcp_execute_and_set(mod_hdcp_write_no_stored_km,
+			&input->no_stored_km_write, &status,
+			hdcp, "no_stored_km_write"))
+		goto out;
+out:
+	return status;
+}
+
+static enum mod_hdcp_status read_h_prime(struct mod_hdcp *hdcp,
+		struct mod_hdcp_event_context *event_ctx,
+		struct mod_hdcp_transition_input_hdcp2 *input)
+{
+	enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS;
+
+	if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK &&
+			event_ctx->event != MOD_HDCP_EVENT_CPIRQ &&
+			event_ctx->event != MOD_HDCP_EVENT_WATCHDOG_TIMEOUT) {
+		event_ctx->unexpected_event = 1;
+		goto out;
+	}
+
+	if (!mod_hdcp_execute_and_set(check_h_prime_available,
+			&input->h_prime_available, &status,
+			hdcp, "h_prime_available"))
+		goto out;
+
+	if (!mod_hdcp_execute_and_set(mod_hdcp_read_h_prime,
+			&input->h_prime_read, &status,
+			hdcp, "h_prime_read"))
+		goto out;
+out:
+	return status;
+}
+
+static enum mod_hdcp_status read_pairing_info_and_validate_h_prime(
+		struct mod_hdcp *hdcp,
+		struct mod_hdcp_event_context *event_ctx,
+		struct mod_hdcp_transition_input_hdcp2 *input)
+{
+	enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS;
+
+	if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK &&
+			event_ctx->event != MOD_HDCP_EVENT_CPIRQ &&
+			event_ctx->event != MOD_HDCP_EVENT_WATCHDOG_TIMEOUT) {
+		event_ctx->unexpected_event = 1;
+		goto out;
+	}
+
+	if (!mod_hdcp_execute_and_set(check_pairing_info_available,
+			&input->pairing_available, &status,
+			hdcp, "pairing_available"))
+		goto out;
+	if (!mod_hdcp_execute_and_set(mod_hdcp_read_pairing_info,
+			&input->pairing_info_read, &status,
+			hdcp, "pairing_info_read"))
+		goto out;
+	if (!mod_hdcp_execute_and_set(mod_hdcp_hdcp2_validate_h_prime,
+			&input->h_prime_validation, &status,
+			hdcp, "h_prime_validation"))
+		goto out;
+out:
+	return status;
+}
+
+static enum mod_hdcp_status send_stored_km(struct mod_hdcp *hdcp,
+		struct mod_hdcp_event_context *event_ctx,
+		struct mod_hdcp_transition_input_hdcp2 *input)
+{
+	enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS;
+
+	if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK) {
+		event_ctx->unexpected_event = 1;
+		goto out;
+	}
+
+	if (!mod_hdcp_execute_and_set(mod_hdcp_write_stored_km,
+			&input->stored_km_write, &status,
+			hdcp, "stored_km_write"))
+		goto out;
+out:
+	return status;
+}
+
+static enum mod_hdcp_status validate_h_prime(struct mod_hdcp *hdcp,
+		struct mod_hdcp_event_context *event_ctx,
+		struct mod_hdcp_transition_input_hdcp2 *input)
+{
+	enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS;
+
+	if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK &&
+			event_ctx->event != MOD_HDCP_EVENT_CPIRQ &&
+			event_ctx->event != MOD_HDCP_EVENT_WATCHDOG_TIMEOUT) {
+		event_ctx->unexpected_event = 1;
+		goto out;
+	}
+
+	if (!mod_hdcp_execute_and_set(check_h_prime_available,
+			&input->h_prime_available, &status,
+			hdcp, "h_prime_available"))
+		goto out;
+	if (!mod_hdcp_execute_and_set(mod_hdcp_read_h_prime,
+			&input->h_prime_read, &status,
+			hdcp, "h_prime_read"))
+		goto out;
+	if (!mod_hdcp_execute_and_set(mod_hdcp_hdcp2_validate_h_prime,
+			&input->h_prime_validation, &status,
+			hdcp, "h_prime_validation"))
+		goto out;
+out:
+	return status;
+}
+
+static enum mod_hdcp_status locality_check(struct mod_hdcp *hdcp,
+		struct mod_hdcp_event_context *event_ctx,
+		struct mod_hdcp_transition_input_hdcp2 *input)
+{
+	enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS;
+
+	if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK) {
+		event_ctx->unexpected_event = 1;
+		goto out;
+	}
+
+	if (!mod_hdcp_execute_and_set(mod_hdcp_hdcp2_prepare_lc_init,
+			&input->lc_init_prepare, &status,
+			hdcp, "lc_init_prepare"))
+		goto out;
+	if (!mod_hdcp_execute_and_set(mod_hdcp_write_lc_init,
+			&input->lc_init_write, &status,
+			 hdcp, "lc_init_write"))
+		goto out;
+	if (is_dp_hdcp(hdcp))
+		udelay(16000);
+	else
+		if (!mod_hdcp_execute_and_set(poll_l_prime_available,
+				&input->l_prime_available_poll, &status,
+				hdcp, "l_prime_available_poll"))
+			goto out;
+	if (!mod_hdcp_execute_and_set(mod_hdcp_read_l_prime,
+			&input->l_prime_read, &status,
+			hdcp, "l_prime_read"))
+		goto out;
+	if (!mod_hdcp_execute_and_set(mod_hdcp_hdcp2_validate_l_prime,
+			&input->l_prime_validation, &status,
+			hdcp, "l_prime_validation"))
+		goto out;
+out:
+	return status;
+}
+
+static enum mod_hdcp_status exchange_ks_and_test_for_repeater(struct mod_hdcp *hdcp,
+		struct mod_hdcp_event_context *event_ctx,
+		struct mod_hdcp_transition_input_hdcp2 *input)
+{
+	enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS;
+
+	if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK) {
+		event_ctx->unexpected_event = 1;
+		goto out;
+	}
+
+	if (!mod_hdcp_execute_and_set(mod_hdcp_hdcp2_prepare_eks,
+			&input->eks_prepare, &status,
+			hdcp, "eks_prepare"))
+		goto out;
+	if (!mod_hdcp_execute_and_set(mod_hdcp_write_eks,
+			&input->eks_write, &status,
+			hdcp, "eks_write"))
+		goto out;
+out:
+	return status;
+}
+
+static enum mod_hdcp_status enable_encryption(struct mod_hdcp *hdcp,
+		struct mod_hdcp_event_context *event_ctx,
+		struct mod_hdcp_transition_input_hdcp2 *input)
+{
+	enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS;
+
+	if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK &&
+			event_ctx->event != MOD_HDCP_EVENT_CPIRQ) {
+		event_ctx->unexpected_event = 1;
+		goto out;
+	}
+	if (event_ctx->event == MOD_HDCP_EVENT_CPIRQ) {
+		process_rxstatus(hdcp, event_ctx, input, &status);
+		goto out;
+	}
+
+	if (is_hdmi_dvi_sl_hdcp(hdcp)) {
+		if (!process_rxstatus(hdcp, event_ctx, input, &status))
+			goto out;
+		if (event_ctx->rx_id_list_ready)
+			goto out;
+	}
+	if (!mod_hdcp_execute_and_set(mod_hdcp_hdcp2_enable_encryption,
+			&input->enable_encryption, &status,
+			hdcp, "enable_encryption"))
+		goto out;
+	if (is_dp_mst_hdcp(hdcp)) {
+		if (!mod_hdcp_execute_and_set(
+				mod_hdcp_hdcp2_enable_dp_stream_encryption,
+				&input->stream_encryption_dp, &status,
+				hdcp, "stream_encryption_dp"))
+			goto out;
+	}
+out:
+	return status;
+}
+
+static enum mod_hdcp_status authenticated(struct mod_hdcp *hdcp,
+		struct mod_hdcp_event_context *event_ctx,
+		struct mod_hdcp_transition_input_hdcp2 *input)
+{
+	enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS;
+
+	if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK &&
+			event_ctx->event != MOD_HDCP_EVENT_CPIRQ) {
+		event_ctx->unexpected_event = 1;
+		goto out;
+	}
+
+	if (!process_rxstatus(hdcp, event_ctx, input, &status))
+		goto out;
+	if (event_ctx->rx_id_list_ready)
+		goto out;
+out:
+	return status;
+}
+
+static enum mod_hdcp_status wait_for_rx_id_list(struct mod_hdcp *hdcp,
+		struct mod_hdcp_event_context *event_ctx,
+		struct mod_hdcp_transition_input_hdcp2 *input)
+{
+	enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS;
+
+	if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK &&
+			event_ctx->event != MOD_HDCP_EVENT_CPIRQ &&
+			event_ctx->event != MOD_HDCP_EVENT_WATCHDOG_TIMEOUT) {
+		event_ctx->unexpected_event = 1;
+		goto out;
+	}
+
+	if (!process_rxstatus(hdcp, event_ctx, input, &status))
+		goto out;
+	if (!event_ctx->rx_id_list_ready) {
+		status = MOD_HDCP_STATUS_HDCP2_RX_ID_LIST_NOT_READY;
+		goto out;
+	}
+out:
+	return status;
+}
+
+static enum mod_hdcp_status verify_rx_id_list_and_send_ack(struct mod_hdcp *hdcp,
+		struct mod_hdcp_event_context *event_ctx,
+		struct mod_hdcp_transition_input_hdcp2 *input)
+{
+	enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS;
+
+	if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK &&
+			event_ctx->event != MOD_HDCP_EVENT_CPIRQ) {
+		event_ctx->unexpected_event = 1;
+		goto out;
+	}
+	if (event_ctx->event == MOD_HDCP_EVENT_CPIRQ) {
+		process_rxstatus(hdcp, event_ctx, input, &status);
+		goto out;
+	}
+
+	if (!mod_hdcp_execute_and_set(mod_hdcp_read_rx_id_list,
+			&input->rx_id_list_read,
+			&status, hdcp, "receiver_id_list_read"))
+		goto out;
+	if (!mod_hdcp_execute_and_set(check_device_count,
+			&input->device_count_check,
+			&status, hdcp, "device_count_check"))
+		goto out;
+	if (!mod_hdcp_execute_and_set(mod_hdcp_hdcp2_validate_rx_id_list,
+			&input->rx_id_list_validation,
+			&status, hdcp, "rx_id_list_validation"))
+		goto out;
+	if (!mod_hdcp_execute_and_set(mod_hdcp_write_repeater_auth_ack,
+			&input->repeater_auth_ack_write,
+			&status, hdcp, "repeater_auth_ack_write"))
+		goto out;
+out:
+	return status;
+}
+
+static enum mod_hdcp_status send_stream_management(struct mod_hdcp *hdcp,
+		struct mod_hdcp_event_context *event_ctx,
+		struct mod_hdcp_transition_input_hdcp2 *input)
+{
+	enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS;
+
+	if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK &&
+			event_ctx->event != MOD_HDCP_EVENT_CPIRQ) {
+		event_ctx->unexpected_event = 1;
+		goto out;
+	}
+	if (event_ctx->event == MOD_HDCP_EVENT_CPIRQ) {
+		process_rxstatus(hdcp, event_ctx, input, &status);
+		goto out;
+	}
+
+	if (is_hdmi_dvi_sl_hdcp(hdcp)) {
+		if (!process_rxstatus(hdcp, event_ctx, input, &status))
+			goto out;
+		if (event_ctx->rx_id_list_ready)
+			goto out;
+	}
+	if (!mod_hdcp_execute_and_set(mod_hdcp_hdcp2_prepare_stream_management,
+			&input->prepare_stream_manage,
+			&status, hdcp, "prepare_stream_manage"))
+		goto out;
+
+	if (!mod_hdcp_execute_and_set(mod_hdcp_write_stream_manage,
+			&input->stream_manage_write,
+			&status, hdcp, "stream_manage_write"))
+		goto out;
+out:
+	return status;
+}
+
+static enum mod_hdcp_status validate_stream_ready(struct mod_hdcp *hdcp,
+		struct mod_hdcp_event_context *event_ctx,
+		struct mod_hdcp_transition_input_hdcp2 *input)
+{
+	enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS;
+
+	if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK &&
+			event_ctx->event != MOD_HDCP_EVENT_CPIRQ &&
+			event_ctx->event != MOD_HDCP_EVENT_WATCHDOG_TIMEOUT) {
+		event_ctx->unexpected_event = 1;
+		goto out;
+	}
+	if (event_ctx->event == MOD_HDCP_EVENT_CPIRQ) {
+		process_rxstatus(hdcp, event_ctx, input, &status);
+		goto out;
+	}
+
+	if (is_hdmi_dvi_sl_hdcp(hdcp)) {
+		if (!process_rxstatus(hdcp, event_ctx, input, &status))
+			goto out;
+		if (event_ctx->rx_id_list_ready) {
+			goto out;
+		}
+	}
+	if (is_hdmi_dvi_sl_hdcp(hdcp))
+		if (!mod_hdcp_execute_and_set(check_stream_ready_available,
+				&input->stream_ready_available,
+				&status, hdcp, "stream_ready_available"))
+			goto out;
+	if (!mod_hdcp_execute_and_set(mod_hdcp_read_stream_ready,
+			&input->stream_ready_read,
+			&status, hdcp, "stream_ready_read"))
+		goto out;
+	if (!mod_hdcp_execute_and_set(mod_hdcp_hdcp2_validate_stream_ready,
+			&input->stream_ready_validation,
+			&status, hdcp, "stream_ready_validation"))
+		goto out;
+
+out:
+	return status;
+}
+
+static enum mod_hdcp_status determine_rx_hdcp_capable_dp(struct mod_hdcp *hdcp,
+		struct mod_hdcp_event_context *event_ctx,
+		struct mod_hdcp_transition_input_hdcp2 *input)
+{
+	enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS;
+
+	if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK) {
+		event_ctx->unexpected_event = 1;
+		goto out;
+	}
+
+	if (!mod_hdcp_execute_and_set(mod_hdcp_read_rxcaps,
+			&input->rx_caps_read_dp,
+			&status, hdcp, "rx_caps_read_dp"))
+		goto out;
+	if (!mod_hdcp_execute_and_set(check_hdcp2_capable,
+			&input->hdcp2_capable_check, &status,
+			hdcp, "hdcp2_capable_check"))
+		goto out;
+out:
+	return status;
+}
+
+static enum mod_hdcp_status send_content_stream_type_dp(struct mod_hdcp *hdcp,
+		struct mod_hdcp_event_context *event_ctx,
+		struct mod_hdcp_transition_input_hdcp2 *input)
+{
+	enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS;
+
+	if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK &&
+			event_ctx->event != MOD_HDCP_EVENT_CPIRQ) {
+		event_ctx->unexpected_event = 1;
+		goto out;
+	}
+
+	if (!process_rxstatus(hdcp, event_ctx, input, &status))
+		goto out;
+	if (!mod_hdcp_execute_and_set(mod_hdcp_write_content_type,
+			&input->content_stream_type_write, &status,
+			hdcp, "content_stream_type_write"))
+		goto out;
+out:
+	return status;
+}
+
+enum mod_hdcp_status mod_hdcp_hdcp2_execution(struct mod_hdcp *hdcp,
+	struct mod_hdcp_event_context *event_ctx,
+	struct mod_hdcp_transition_input_hdcp2 *input)
+{
+	enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS;
+
+	switch (current_state(hdcp)) {
+	case H2_A0_KNOWN_HDCP2_CAPABLE_RX:
+		status = known_hdcp2_capable_rx(hdcp, event_ctx, input);
+		break;
+	case H2_A1_SEND_AKE_INIT:
+		status = send_ake_init(hdcp, event_ctx, input);
+		break;
+	case H2_A1_VALIDATE_AKE_CERT:
+		status = validate_ake_cert(hdcp, event_ctx, input);
+		break;
+	case H2_A1_SEND_NO_STORED_KM:
+		status = send_no_stored_km(hdcp, event_ctx, input);
+		break;
+	case H2_A1_READ_H_PRIME:
+		status = read_h_prime(hdcp, event_ctx, input);
+		break;
+	case H2_A1_READ_PAIRING_INFO_AND_VALIDATE_H_PRIME:
+		status = read_pairing_info_and_validate_h_prime(hdcp,
+				event_ctx, input);
+		break;
+	case H2_A1_SEND_STORED_KM:
+		status = send_stored_km(hdcp, event_ctx, input);
+		break;
+	case H2_A1_VALIDATE_H_PRIME:
+		status = validate_h_prime(hdcp, event_ctx, input);
+		break;
+	case H2_A2_LOCALITY_CHECK:
+		status = locality_check(hdcp, event_ctx, input);
+		break;
+	case H2_A3_EXCHANGE_KS_AND_TEST_FOR_REPEATER:
+		status = exchange_ks_and_test_for_repeater(hdcp, event_ctx, input);
+		break;
+	case H2_ENABLE_ENCRYPTION:
+		status = enable_encryption(hdcp, event_ctx, input);
+		break;
+	case H2_A5_AUTHENTICATED:
+		status = authenticated(hdcp, event_ctx, input);
+		break;
+	case H2_A6_WAIT_FOR_RX_ID_LIST:
+		status = wait_for_rx_id_list(hdcp, event_ctx, input);
+		break;
+	case H2_A78_VERIFY_RX_ID_LIST_AND_SEND_ACK:
+		status = verify_rx_id_list_and_send_ack(hdcp, event_ctx, input);
+		break;
+	case H2_A9_SEND_STREAM_MANAGEMENT:
+		status = send_stream_management(hdcp, event_ctx, input);
+		break;
+	case H2_A9_VALIDATE_STREAM_READY:
+		status = validate_stream_ready(hdcp, event_ctx, input);
+		break;
+	default:
+		status = MOD_HDCP_STATUS_INVALID_STATE;
+		break;
+	}
+
+	return status;
+}
+
+enum mod_hdcp_status mod_hdcp_hdcp2_dp_execution(struct mod_hdcp *hdcp,
+	struct mod_hdcp_event_context *event_ctx,
+	struct mod_hdcp_transition_input_hdcp2 *input)
+{
+	enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS;
+
+	switch (current_state(hdcp)) {
+	case D2_A0_DETERMINE_RX_HDCP_CAPABLE:
+		status = determine_rx_hdcp_capable_dp(hdcp, event_ctx, input);
+		break;
+	case D2_A1_SEND_AKE_INIT:
+		status = send_ake_init(hdcp, event_ctx, input);
+		break;
+	case D2_A1_VALIDATE_AKE_CERT:
+		status = validate_ake_cert(hdcp, event_ctx, input);
+		break;
+	case D2_A1_SEND_NO_STORED_KM:
+		status = send_no_stored_km(hdcp, event_ctx, input);
+		break;
+	case D2_A1_READ_H_PRIME:
+		status = read_h_prime(hdcp, event_ctx, input);
+		break;
+	case D2_A1_READ_PAIRING_INFO_AND_VALIDATE_H_PRIME:
+		status = read_pairing_info_and_validate_h_prime(hdcp,
+				event_ctx, input);
+		break;
+	case D2_A1_SEND_STORED_KM:
+		status = send_stored_km(hdcp, event_ctx, input);
+		break;
+	case D2_A1_VALIDATE_H_PRIME:
+		status = validate_h_prime(hdcp, event_ctx, input);
+		break;
+	case D2_A2_LOCALITY_CHECK:
+		status = locality_check(hdcp, event_ctx, input);
+		break;
+	case D2_A34_EXCHANGE_KS_AND_TEST_FOR_REPEATER:
+		status = exchange_ks_and_test_for_repeater(hdcp,
+				event_ctx, input);
+		break;
+	case D2_SEND_CONTENT_STREAM_TYPE:
+		status = send_content_stream_type_dp(hdcp, event_ctx, input);
+		break;
+	case D2_ENABLE_ENCRYPTION:
+		status = enable_encryption(hdcp, event_ctx, input);
+		break;
+	case D2_A5_AUTHENTICATED:
+		status = authenticated(hdcp, event_ctx, input);
+		break;
+	case D2_A6_WAIT_FOR_RX_ID_LIST:
+		status = wait_for_rx_id_list(hdcp, event_ctx, input);
+		break;
+	case D2_A78_VERIFY_RX_ID_LIST_AND_SEND_ACK:
+		status = verify_rx_id_list_and_send_ack(hdcp, event_ctx, input);
+		break;
+	case D2_A9_SEND_STREAM_MANAGEMENT:
+		status = send_stream_management(hdcp, event_ctx, input);
+		break;
+	case D2_A9_VALIDATE_STREAM_READY:
+		status = validate_stream_ready(hdcp, event_ctx, input);
+		break;
+	default:
+		status = MOD_HDCP_STATUS_INVALID_STATE;
+		break;
+	}
+
+	return status;
+}

drivers/gpu/drm/amd/display/modules/hdcp/hdcp2_transition.c

+/*
+ * Copyright 2018 Advanced Micro Devices, Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * Authors: AMD
+ *
+ */
+
+#include "hdcp.h"
+
+enum mod_hdcp_status mod_hdcp_hdcp2_transition(struct mod_hdcp *hdcp,
+		struct mod_hdcp_event_context *event_ctx,
+		struct mod_hdcp_transition_input_hdcp2 *input,
+		struct mod_hdcp_output *output)
+{
+	enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS;
+	struct mod_hdcp_connection *conn = &hdcp->connection;
+	struct mod_hdcp_link_adjustment *adjust = &hdcp->connection.link.adjust;
+
+	switch (current_state(hdcp)) {
+	case H2_A0_KNOWN_HDCP2_CAPABLE_RX:
+		if (input->hdcp2version_read != PASS ||
+				input->hdcp2_capable_check != PASS) {
+			adjust->hdcp2.disable = 1;
+			callback_in_ms(0, output);
+			set_state_id(hdcp, output, HDCP_INITIALIZED);
+		} else {
+			callback_in_ms(0, output);
+			set_state_id(hdcp, output, H2_A1_SEND_AKE_INIT);
+		}
+		break;
+	case H2_A1_SEND_AKE_INIT:
+		if (input->add_topology != PASS ||
+				input->create_session != PASS ||
+				input->ake_init_prepare != PASS) {
+			/* out of sync with psp state */
+			adjust->hdcp2.disable = 1;
+			fail_and_restart_in_ms(0, &status, output);
+			break;
+		} else if (input->ake_init_write != PASS) {
+			fail_and_restart_in_ms(0, &status, output);
+			break;
+		}
+		set_watchdog_in_ms(hdcp, 100, output);
+		callback_in_ms(0, output);
+		set_state_id(hdcp, output, H2_A1_VALIDATE_AKE_CERT);
+		break;
+	case H2_A1_VALIDATE_AKE_CERT:
+		if (input->ake_cert_available != PASS) {
+			if (event_ctx->event ==
+					MOD_HDCP_EVENT_WATCHDOG_TIMEOUT) {
+				/* 1A-08: consider ake timeout a failure */
+				/* some hdmi receivers are not ready for HDCP
+				 * immediately after video becomes active,
+				 * delay 1s before retry on first HDCP message
+				 * timeout.
+				 */
+				fail_and_restart_in_ms(1000, &status, output);
+			} else {
+				/* continue ake cert polling*/
+				callback_in_ms(10, output);
+				increment_stay_counter(hdcp);
+			}
+			break;
+		} else if (input->ake_cert_read != PASS ||
+				input->ake_cert_validation != PASS) {
+			/*
+			 * 1A-09: consider invalid ake cert a failure
+			 * 1A-10: consider receiver id listed in SRM a failure
+			 */
+			fail_and_restart_in_ms(0, &status, output);
+			break;
+		}
+		if (conn->is_km_stored &&
+				!adjust->hdcp2.force_no_stored_km) {
+			callback_in_ms(0, output);
+			set_state_id(hdcp, output, H2_A1_SEND_STORED_KM);
+		} else {
+			callback_in_ms(0, output);
+			set_state_id(hdcp, output, H2_A1_SEND_NO_STORED_KM);
+		}
+		break;
+	case H2_A1_SEND_NO_STORED_KM:
+		if (input->no_stored_km_write != PASS) {
+			fail_and_restart_in_ms(0, &status, output);
+			break;
+		}
+		if (adjust->hdcp2.increase_h_prime_timeout)
+			set_watchdog_in_ms(hdcp, 2000, output);
+		else
+			set_watchdog_in_ms(hdcp, 1000, output);
+		callback_in_ms(0, output);
+		set_state_id(hdcp, output, H2_A1_READ_H_PRIME);
+		break;
+	case H2_A1_READ_H_PRIME:
+		if (input->h_prime_available != PASS) {
+			if (event_ctx->event ==
+					MOD_HDCP_EVENT_WATCHDOG_TIMEOUT) {
+				/* 1A-11-3: consider h' timeout a failure */
+				fail_and_restart_in_ms(0, &status, output);
+			} else {
+				/* continue h' polling */
+				callback_in_ms(100, output);
+				increment_stay_counter(hdcp);
+			}
+			break;
+		} else if (input->h_prime_read != PASS) {
+			fail_and_restart_in_ms(0, &status, output);
+			break;
+		}
+		set_watchdog_in_ms(hdcp, 200, output);
+		callback_in_ms(0, output);
+		set_state_id(hdcp, output, H2_A1_READ_PAIRING_INFO_AND_VALIDATE_H_PRIME);
+		break;
+	case H2_A1_READ_PAIRING_INFO_AND_VALIDATE_H_PRIME:
+		if (input->pairing_available != PASS) {
+			if (event_ctx->event ==
+					MOD_HDCP_EVENT_WATCHDOG_TIMEOUT) {
+				/* 1A-12: consider pairing info timeout
+				 * a failure
+				 */
+				fail_and_restart_in_ms(0, &status, output);
+			} else {
+				/* continue pairing info polling */
+				callback_in_ms(20, output);
+				increment_stay_counter(hdcp);
+			}
+			break;
+		} else if (input->pairing_info_read != PASS ||
+				input->h_prime_validation != PASS) {
+			/* 1A-11-1: consider invalid h' a failure */
+			fail_and_restart_in_ms(0, &status, output);
+			break;
+		}
+		callback_in_ms(0, output);
+		set_state_id(hdcp, output, H2_A2_LOCALITY_CHECK);
+		break;
+	case H2_A1_SEND_STORED_KM:
+		if (input->stored_km_write != PASS) {
+			fail_and_restart_in_ms(0, &status, output);
+			break;
+		}
+		set_watchdog_in_ms(hdcp, 200, output);
+		callback_in_ms(0, output);
+		set_state_id(hdcp, output, H2_A1_VALIDATE_H_PRIME);
+		break;
+	case H2_A1_VALIDATE_H_PRIME:
+		if (input->h_prime_available != PASS) {
+			if (event_ctx->event ==
+					MOD_HDCP_EVENT_WATCHDOG_TIMEOUT) {
+				/* 1A-11-2: consider h' timeout a failure */
+				fail_and_restart_in_ms(0, &status, output);
+			} else {
+				/* continue h' polling */
+				callback_in_ms(20, output);
+				increment_stay_counter(hdcp);
+			}
+			break;
+		} else if (input->h_prime_read != PASS) {
+			fail_and_restart_in_ms(0, &status, output);
+			break;
+		} else if (input->h_prime_validation != PASS) {
+			/* 1A-11-1: consider invalid h' a failure */
+			adjust->hdcp2.force_no_stored_km = 1;
+			fail_and_restart_in_ms(0, &status, output);
+			break;
+		}
+		callback_in_ms(0, output);
+		set_state_id(hdcp, output, H2_A2_LOCALITY_CHECK);
+		break;
+	case H2_A2_LOCALITY_CHECK:
+		if (hdcp->state.stay_count > 10 ||
+				input->lc_init_prepare != PASS ||
+				input->lc_init_write != PASS ||
+				input->l_prime_available_poll != PASS ||
+				input->l_prime_read != PASS) {
+			/*
+			 * 1A-05: consider disconnection after LC init a failure
+			 * 1A-13-1: consider invalid l' a failure
+			 * 1A-13-2: consider l' timeout a failure
+			 */
+			fail_and_restart_in_ms(0, &status, output);
+			break;
+		} else if (input->l_prime_validation != PASS) {
+			callback_in_ms(0, output);
+			increment_stay_counter(hdcp);
+			break;
+		}
+		callback_in_ms(0, output);
+		set_state_id(hdcp, output, H2_A3_EXCHANGE_KS_AND_TEST_FOR_REPEATER);
+		break;
+	case H2_A3_EXCHANGE_KS_AND_TEST_FOR_REPEATER:
+		if (input->eks_prepare != PASS ||
+				input->eks_write != PASS) {
+			fail_and_restart_in_ms(0, &status, output);
+			break;
+		}
+		if (conn->is_repeater) {
+			set_watchdog_in_ms(hdcp, 3000, output);
+			callback_in_ms(0, output);
+			set_state_id(hdcp, output, H2_A6_WAIT_FOR_RX_ID_LIST);
+		} else {
+			/* some CTS equipment requires a delay GREATER than
+			 * 200 ms, so delay 210 ms instead of 200 ms
+			 */
+			callback_in_ms(210, output);
+			set_state_id(hdcp, output, H2_ENABLE_ENCRYPTION);
+		}
+		break;
+	case H2_ENABLE_ENCRYPTION:
+		if (input->rxstatus_read != PASS ||
+				input->reauth_request_check != PASS) {
+			/*
+			 * 1A-07: restart hdcp on REAUTH_REQ
+			 * 1B-08: restart hdcp on REAUTH_REQ
+			 */
+			fail_and_restart_in_ms(0, &status, output);
+			break;
+		} else if (event_ctx->rx_id_list_ready && conn->is_repeater) {
+			callback_in_ms(0, output);
+			set_state_id(hdcp, output, H2_A78_VERIFY_RX_ID_LIST_AND_SEND_ACK);
+			break;
+		} else if (input->enable_encryption != PASS) {
+			fail_and_restart_in_ms(0, &status, output);
+			break;
+		}
+		callback_in_ms(0, output);
+		set_state_id(hdcp, output, H2_A5_AUTHENTICATED);
+		HDCP_FULL_DDC_TRACE(hdcp);
+		break;
+	case H2_A5_AUTHENTICATED:
+		if (input->rxstatus_read != PASS ||
+				input->reauth_request_check != PASS) {
+			fail_and_restart_in_ms(0, &status, output);
+			break;
+		} else if (event_ctx->rx_id_list_ready && conn->is_repeater) {
+			callback_in_ms(0, output);
+			set_state_id(hdcp, output, H2_A78_VERIFY_RX_ID_LIST_AND_SEND_ACK);
+			break;
+		}
+		callback_in_ms(500, output);
+		increment_stay_counter(hdcp);
+		break;
+	case H2_A6_WAIT_FOR_RX_ID_LIST:
+		if (input->rxstatus_read != PASS ||
+				input->reauth_request_check != PASS) {
+			fail_and_restart_in_ms(0, &status, output);
+			break;
+		} else if (!event_ctx->rx_id_list_ready) {
+			if (event_ctx->event == MOD_HDCP_EVENT_WATCHDOG_TIMEOUT) {
+				/* 1B-02: consider rx id list timeout a failure */
+				/* some CTS equipment's actual timeout
+				 * measurement is slightly greater than 3000 ms.
+				 * Delay 100 ms to ensure it is fully timeout
+				 * before re-authentication.
+				 */
+				fail_and_restart_in_ms(100, &status, output);
+			} else {
+				callback_in_ms(300, output);
+				increment_stay_counter(hdcp);
+			}
+			break;
+		}
+		callback_in_ms(0, output);
+		set_state_id(hdcp, output, H2_A78_VERIFY_RX_ID_LIST_AND_SEND_ACK);
+		break;
+	case H2_A78_VERIFY_RX_ID_LIST_AND_SEND_ACK:
+		if (input->rxstatus_read != PASS ||
+				input->reauth_request_check != PASS ||
+				input->rx_id_list_read != PASS ||
+				input->device_count_check != PASS ||
+				input->rx_id_list_validation != PASS ||
+				input->repeater_auth_ack_write != PASS) {
+			/* 1B-03: consider invalid v' a failure
+			 * 1B-04: consider MAX_DEVS_EXCEEDED a failure
+			 * 1B-05: consider MAX_CASCADE_EXCEEDED a failure
+			 * 1B-06: consider invalid seq_num_V a failure
+			 * 1B-09: consider seq_num_V rollover a failure
+			 */
+			fail_and_restart_in_ms(0, &status, output);
+			break;
+		}
+		callback_in_ms(0, output);
+		set_state_id(hdcp, output, H2_A9_SEND_STREAM_MANAGEMENT);
+		break;
+	case H2_A9_SEND_STREAM_MANAGEMENT:
+		if (input->rxstatus_read != PASS ||
+				input->reauth_request_check != PASS) {
+			fail_and_restart_in_ms(0, &status, output);
+			break;
+		} else if (event_ctx->rx_id_list_ready && conn->is_repeater) {
+			callback_in_ms(0, output);
+			set_state_id(hdcp, output, H2_A78_VERIFY_RX_ID_LIST_AND_SEND_ACK);
+			break;
+		} else if (input->prepare_stream_manage != PASS ||
+				input->stream_manage_write != PASS) {
+			fail_and_restart_in_ms(0, &status, output);
+			break;
+		}
+		set_watchdog_in_ms(hdcp, 100, output);
+		callback_in_ms(0, output);
+		set_state_id(hdcp, output, H2_A9_VALIDATE_STREAM_READY);
+		break;
+	case H2_A9_VALIDATE_STREAM_READY:
+		if (input->rxstatus_read != PASS ||
+				input->reauth_request_check != PASS) {
+			fail_and_restart_in_ms(0, &status, output);
+			break;
+		} else if (event_ctx->rx_id_list_ready && conn->is_repeater) {
+			callback_in_ms(0, output);
+			set_state_id(hdcp, output, H2_A78_VERIFY_RX_ID_LIST_AND_SEND_ACK);
+			break;
+		} else if (input->stream_ready_available != PASS) {
+			if (event_ctx->event == MOD_HDCP_EVENT_WATCHDOG_TIMEOUT) {
+				/* 1B-10-2: restart content stream management on
+				 * stream ready timeout
+				 */
+				hdcp->auth.count.stream_management_retry_count++;
+				callback_in_ms(0, output);
+				set_state_id(hdcp, output, H2_A9_SEND_STREAM_MANAGEMENT);
+			} else {
+				callback_in_ms(10, output);
+				increment_stay_counter(hdcp);
+			}
+			break;
+		} else if (input->stream_ready_read != PASS ||
+				input->stream_ready_validation != PASS) {
+			/*
+			 * 1B-10-1: restart content stream management
+			 * on invalid M'
+			 */
+			if (hdcp->auth.count.stream_management_retry_count > 10) {
+				fail_and_restart_in_ms(0, &status, output);
+			} else {
+				hdcp->auth.count.stream_management_retry_count++;
+				callback_in_ms(0, output);
+				set_state_id(hdcp, output, H2_A9_SEND_STREAM_MANAGEMENT);
+			}
+			break;
+		}
+		callback_in_ms(200, output);
+		set_state_id(hdcp, output, H2_ENABLE_ENCRYPTION);
+		break;
+	default:
+		status = MOD_HDCP_STATUS_INVALID_STATE;
+		fail_and_restart_in_ms(0, &status, output);
+		break;
+	}
+
+	return status;
+}
+
+enum mod_hdcp_status mod_hdcp_hdcp2_dp_transition(struct mod_hdcp *hdcp,
+		struct mod_hdcp_event_context *event_ctx,
+		struct mod_hdcp_transition_input_hdcp2 *input,
+		struct mod_hdcp_output *output)
+{
+	enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS;
+	struct mod_hdcp_connection *conn = &hdcp->connection;
+	struct mod_hdcp_link_adjustment *adjust = &hdcp->connection.link.adjust;
+
+	switch (current_state(hdcp)) {
+	case D2_A0_DETERMINE_RX_HDCP_CAPABLE:
+		if (input->rx_caps_read_dp != PASS ||
+				input->hdcp2_capable_check != PASS) {
+			adjust->hdcp2.disable = 1;
+			callback_in_ms(0, output);
+			set_state_id(hdcp, output, HDCP_INITIALIZED);
+		} else {
+			callback_in_ms(0, output);
+			set_state_id(hdcp, output, D2_A1_SEND_AKE_INIT);
+		}
+		break;
+	case D2_A1_SEND_AKE_INIT:
+		if (input->add_topology != PASS ||
+				input->create_session != PASS ||
+				input->ake_init_prepare != PASS) {
+			/* out of sync with psp state */
+			adjust->hdcp2.disable = 1;
+			fail_and_restart_in_ms(0, &status, output);
+			break;
+		} else if (input->ake_init_write != PASS) {
+			/* possibly display not ready */
+			fail_and_restart_in_ms(0, &status, output);
+			break;
+		}
+		callback_in_ms(100, output);
+		set_state_id(hdcp, output, D2_A1_VALIDATE_AKE_CERT);
+		break;
+	case D2_A1_VALIDATE_AKE_CERT:
+		if (input->ake_cert_read != PASS ||
+				input->ake_cert_validation != PASS) {
+			/*
+			 * 1A-08: consider invalid ake cert a failure
+			 * 1A-09: consider receiver id listed in SRM a failure
+			 */
+			fail_and_restart_in_ms(0, &status, output);
+			break;
+		}
+		if (conn->is_km_stored &&
+				!adjust->hdcp2.force_no_stored_km) {
+			callback_in_ms(0, output);
+			set_state_id(hdcp, output, D2_A1_SEND_STORED_KM);
+		} else {
+			callback_in_ms(0, output);
+			set_state_id(hdcp, output, D2_A1_SEND_NO_STORED_KM);
+		}
+		break;
+	case D2_A1_SEND_NO_STORED_KM:
+		if (input->no_stored_km_write != PASS) {
+			fail_and_restart_in_ms(0, &status, output);
+			break;
+		}
+		if (adjust->hdcp2.increase_h_prime_timeout)
+			set_watchdog_in_ms(hdcp, 2000, output);
+		else
+			set_watchdog_in_ms(hdcp, 1000, output);
+		set_state_id(hdcp, output, D2_A1_READ_H_PRIME);
+		break;
+	case D2_A1_READ_H_PRIME:
+		if (input->h_prime_available != PASS) {
+			if (event_ctx->event ==
+					MOD_HDCP_EVENT_WATCHDOG_TIMEOUT)
+				/* 1A-10-3: consider h' timeout a failure */
+				fail_and_restart_in_ms(0, &status, output);
+			else
+				increment_stay_counter(hdcp);
+			break;
+		} else if (input->h_prime_read != PASS) {
+			fail_and_restart_in_ms(0, &status, output);
+			break;
+		}
+		set_watchdog_in_ms(hdcp, 200, output);
+		set_state_id(hdcp, output, D2_A1_READ_PAIRING_INFO_AND_VALIDATE_H_PRIME);
+		break;
+	case D2_A1_READ_PAIRING_INFO_AND_VALIDATE_H_PRIME:
+		if (input->pairing_available != PASS) {
+			if (event_ctx->event ==
+					MOD_HDCP_EVENT_WATCHDOG_TIMEOUT)
+				/*
+				 * 1A-11: consider pairing info timeout
+				 * a failure
+				 */
+				fail_and_restart_in_ms(0, &status, output);
+			else
+				increment_stay_counter(hdcp);
+			break;
+		} else if (input->pairing_info_read != PASS ||
+				input->h_prime_validation != PASS) {
+			/* 1A-10-1: consider invalid h' a failure */
+			fail_and_restart_in_ms(0, &status, output);
+			break;
+		}
+		callback_in_ms(0, output);
+		set_state_id(hdcp, output, D2_A2_LOCALITY_CHECK);
+		break;
+	case D2_A1_SEND_STORED_KM:
+		if (input->stored_km_write != PASS) {
+			fail_and_restart_in_ms(0, &status, output);
+			break;
+		}
+		set_watchdog_in_ms(hdcp, 200, output);
+		set_state_id(hdcp, output, D2_A1_VALIDATE_H_PRIME);
+		break;
+	case D2_A1_VALIDATE_H_PRIME:
+		if (input->h_prime_available != PASS) {
+			if (event_ctx->event ==
+					MOD_HDCP_EVENT_WATCHDOG_TIMEOUT)
+				/* 1A-10-2: consider h' timeout a failure */
+				fail_and_restart_in_ms(0, &status, output);
+			else
+				increment_stay_counter(hdcp);
+			break;
+		} else if (input->h_prime_read != PASS) {
+			fail_and_restart_in_ms(0, &status, output);
+			break;
+		} else if (input->h_prime_validation != PASS) {
+			/* 1A-10-1: consider invalid h' a failure */
+			adjust->hdcp2.force_no_stored_km = 1;
+			fail_and_restart_in_ms(0, &status, output);
+			break;
+		}
+		callback_in_ms(0, output);
+		set_state_id(hdcp, output, D2_A2_LOCALITY_CHECK);
+		break;
+	case D2_A2_LOCALITY_CHECK:
+		if (hdcp->state.stay_count > 10 ||
+				input->lc_init_prepare != PASS ||
+				input->lc_init_write != PASS ||
+				input->l_prime_read != PASS) {
+			/* 1A-12: consider invalid l' a failure */
+			fail_and_restart_in_ms(0, &status, output);
+			break;
+		} else if (input->l_prime_validation != PASS) {
+			callback_in_ms(0, output);
+			increment_stay_counter(hdcp);
+			break;
+		}
+		callback_in_ms(0, output);
+		set_state_id(hdcp, output, D2_A34_EXCHANGE_KS_AND_TEST_FOR_REPEATER);
+		break;
+	case D2_A34_EXCHANGE_KS_AND_TEST_FOR_REPEATER:
+		if (input->eks_prepare != PASS ||
+				input->eks_write != PASS) {
+			fail_and_restart_in_ms(0, &status, output);
+			break;
+		}
+		if (conn->is_repeater) {
+			set_watchdog_in_ms(hdcp, 3000, output);
+			set_state_id(hdcp, output, D2_A6_WAIT_FOR_RX_ID_LIST);
+		} else {
+			callback_in_ms(0, output);
+			set_state_id(hdcp, output, D2_SEND_CONTENT_STREAM_TYPE);
+		}
+		break;
+	case D2_SEND_CONTENT_STREAM_TYPE:
+		if (input->rxstatus_read != PASS ||
+				input->reauth_request_check != PASS ||
+				input->link_integrity_check_dp != PASS ||
+				input->content_stream_type_write != PASS) {
+			fail_and_restart_in_ms(0, &status, output);
+			break;
+		}
+		callback_in_ms(210, output);
+		set_state_id(hdcp, output, D2_ENABLE_ENCRYPTION);
+		break;
+	case D2_ENABLE_ENCRYPTION:
+		if (input->rxstatus_read != PASS ||
+				input->reauth_request_check != PASS ||
+				input->link_integrity_check_dp != PASS) {
+			/*
+			 * 1A-07: restart hdcp on REAUTH_REQ
+			 * 1B-08: restart hdcp on REAUTH_REQ
+			 */
+			fail_and_restart_in_ms(0, &status, output);
+			break;
+		} else if (event_ctx->rx_id_list_ready && conn->is_repeater) {
+			callback_in_ms(0, output);
+			set_state_id(hdcp, output, D2_A78_VERIFY_RX_ID_LIST_AND_SEND_ACK);
+			break;
+		} else if (input->enable_encryption != PASS ||
+				(is_dp_mst_hdcp(hdcp) && input->stream_encryption_dp != PASS)) {
+			fail_and_restart_in_ms(0, &status, output);
+			break;
+		}
+		set_state_id(hdcp, output, D2_A5_AUTHENTICATED);
+		HDCP_FULL_DDC_TRACE(hdcp);
+		break;
+	case D2_A5_AUTHENTICATED:
+		if (input->rxstatus_read != PASS ||
+				input->reauth_request_check != PASS) {
+			fail_and_restart_in_ms(0, &status, output);
+			break;
+		} else if (input->link_integrity_check_dp != PASS) {
+			if (hdcp->connection.hdcp2_retry_count >= 1)
+				adjust->hdcp2.disable_type1 = 1;
+			fail_and_restart_in_ms(0, &status, output);
+			break;
+		} else if (event_ctx->rx_id_list_ready && conn->is_repeater) {
+			callback_in_ms(0, output);
+			set_state_id(hdcp, output, D2_A78_VERIFY_RX_ID_LIST_AND_SEND_ACK);
+			break;
+		}
+		increment_stay_counter(hdcp);
+		break;
+	case D2_A6_WAIT_FOR_RX_ID_LIST:
+		if (input->rxstatus_read != PASS ||
+				input->reauth_request_check != PASS ||
+				input->link_integrity_check_dp != PASS) {
+			fail_and_restart_in_ms(0, &status, output);
+			break;
+		} else if (!event_ctx->rx_id_list_ready) {
+			if (event_ctx->event == MOD_HDCP_EVENT_WATCHDOG_TIMEOUT)
+				/* 1B-02: consider rx id list timeout a failure */
+				fail_and_restart_in_ms(0, &status, output);
+			else
+				increment_stay_counter(hdcp);
+			break;
+		}
+		callback_in_ms(0, output);
+		set_state_id(hdcp, output, D2_A78_VERIFY_RX_ID_LIST_AND_SEND_ACK);
+		break;
+	case D2_A78_VERIFY_RX_ID_LIST_AND_SEND_ACK:
+		if (input->rxstatus_read != PASS ||
+				input->reauth_request_check != PASS ||
+				input->link_integrity_check_dp != PASS ||
+				input->rx_id_list_read != PASS ||
+				input->device_count_check != PASS ||
+				input->rx_id_list_validation != PASS ||
+				input->repeater_auth_ack_write != PASS) {
+			/*
+			 * 1B-03: consider invalid v' a failure
+			 * 1B-04: consider MAX_DEVS_EXCEEDED a failure
+			 * 1B-05: consider MAX_CASCADE_EXCEEDED a failure
+			 * 1B-06: consider invalid seq_num_V a failure
+			 * 1B-09: consider seq_num_V rollover a failure
+			 */
+			fail_and_restart_in_ms(0, &status, output);
+			break;
+		}
+		callback_in_ms(0, output);
+		set_state_id(hdcp, output, D2_A9_SEND_STREAM_MANAGEMENT);
+		break;
+	case D2_A9_SEND_STREAM_MANAGEMENT:
+		if (input->rxstatus_read != PASS ||
+				input->reauth_request_check != PASS ||
+				input->link_integrity_check_dp != PASS) {
+			fail_and_restart_in_ms(0, &status, output);
+			break;
+		} else if (event_ctx->rx_id_list_ready) {
+			callback_in_ms(0, output);
+			set_state_id(hdcp, output, D2_A78_VERIFY_RX_ID_LIST_AND_SEND_ACK);
+			break;
+		} else if (input->prepare_stream_manage != PASS ||
+				input->stream_manage_write != PASS) {
+			fail_and_restart_in_ms(0, &status, output);
+			break;
+		}
+		callback_in_ms(100, output);
+		set_state_id(hdcp, output, D2_A9_VALIDATE_STREAM_READY);
+		break;
+	case D2_A9_VALIDATE_STREAM_READY:
+		if (input->rxstatus_read != PASS ||
+				input->reauth_request_check != PASS ||
+				input->link_integrity_check_dp != PASS) {
+			fail_and_restart_in_ms(0, &status, output);
+			break;
+		} else if (event_ctx->rx_id_list_ready) {
+			callback_in_ms(0, output);
+			set_state_id(hdcp, output, D2_A78_VERIFY_RX_ID_LIST_AND_SEND_ACK);
+			break;
+		} else if (input->stream_ready_read != PASS ||
+				input->stream_ready_validation != PASS) {
+			/*
+			 * 1B-10-1: restart content stream management
+			 * on invalid M'
+			 * 1B-10-2: consider stream ready timeout a failure
+			 */
+			if (hdcp->auth.count.stream_management_retry_count > 10) {
+				fail_and_restart_in_ms(0, &status, output);
+			} else {
+				hdcp->auth.count.stream_management_retry_count++;
+				callback_in_ms(0, output);
+				set_state_id(hdcp, output, D2_A9_SEND_STREAM_MANAGEMENT);
+			}
+			break;
+		}
+		callback_in_ms(200, output);
+		set_state_id(hdcp, output, D2_ENABLE_ENCRYPTION);
+		break;
+	default:
+		status = MOD_HDCP_STATUS_INVALID_STATE;
+		fail_and_restart_in_ms(0, &status, output);
+		break;
+	}
+	return status;
+}

drivers/gpu/drm/amd/display/modules/inc/mod_hdcp.h

@@ -77,6 +77,7 @@ enum mod_hdcp_status {
 	MOD_HDCP_STATUS_HDCP2_H_PRIME_PENDING,
 	MOD_HDCP_STATUS_HDCP2_PAIRING_INFO_PENDING,
 	MOD_HDCP_STATUS_HDCP2_VALIDATE_AKE_CERT_FAILURE,
+	MOD_HDCP_STATUS_HDCP2_AKE_CERT_REVOKED,
 	MOD_HDCP_STATUS_HDCP2_VALIDATE_H_PRIME_FAILURE,
 	MOD_HDCP_STATUS_HDCP2_VALIDATE_PAIRING_INFO_FAILURE,
 	MOD_HDCP_STATUS_HDCP2_PREP_LC_INIT_FAILURE,
@@ -86,6 +87,7 @@ enum mod_hdcp_status {
 	MOD_HDCP_STATUS_HDCP2_ENABLE_ENCRYPTION_FAILURE,
 	MOD_HDCP_STATUS_HDCP2_RX_ID_LIST_NOT_READY,
 	MOD_HDCP_STATUS_HDCP2_VALIDATE_RX_ID_LIST_FAILURE,
+	MOD_HDCP_STATUS_HDCP2_RX_ID_LIST_REVOKED,
 	MOD_HDCP_STATUS_HDCP2_ENABLE_STREAM_ENCRYPTION,
 	MOD_HDCP_STATUS_HDCP2_STREAM_READY_PENDING,
 	MOD_HDCP_STATUS_HDCP2_VALIDATE_STREAM_READY_FAILURE,