drm/amd/display: add aux transition event log.

[Why]
Enhance aux transition debugging information.

[How]
Added Aux request and reply event log.
Signed-off-by: Chiawen Huang <chiawen.huang@amd.com>
Reviewed-by: Tony Cheng <Tony.Cheng@amd.com>
Acked-by: Bhawanpreet Lakha <Bhawanpreet.Lakha@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/display/dc/dm_event_log.h

+/*
+ * 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
+ *
+ */
+
+/**
+ * This file defines external dependencies of Display Core.
+ */
+
+#ifndef __DM_EVENT_LOG_H__
+
+#define __DM_EVENT_LOG_H__
+
+#define EVENT_LOG_I2CAUX_READ(transType, dcc, address, status, len, data)
+#define EVENT_LOG_I2CAUX_WRITE(transType, dcc, address, status, len, data)
+#define EVENT_LOG_AUX_REQ(dcc, type, action, address, len, data)
+#define EVENT_LOG_AUX_Reply(dcc, type, swStatus, replyStatus, len, data)
+
+#endif

drivers/gpu/drm/amd/display/dc/i2caux/aux_engine.c

@@ -24,6 +24,7 @@
  */
 
 #include "dm_services.h"
+#include "dm_event_log.h"
 
 /*
  * Pre-requisites: headers required by header of this unit
@@ -296,6 +297,12 @@ static bool read_command(
 
 	if (request->payload.address_space ==
 		I2CAUX_TRANSACTION_ADDRESS_SPACE_DPCD) {
+		EVENT_LOG_I2CAUX_READ(request->payload.address_space,
+				engine->base.ddc->pin_data->en,
+				request->payload.address,
+				request->status,
+				request->payload.length,
+				request->payload.data);
 		DC_LOG_I2C_AUX("READ: addr:0x%x  value:0x%x Result:%d",
 				request->payload.address,
 				request->payload.data[0],
@@ -512,6 +519,12 @@ static bool write_command(
 
 	if (request->payload.address_space ==
 		I2CAUX_TRANSACTION_ADDRESS_SPACE_DPCD) {
+		EVENT_LOG_I2CAUX_WRITE(request->payload.address_space,
+				engine->base.ddc->pin_data->en,
+				request->payload.address,
+				request->status,
+				request->payload.length,
+				request->payload.data);
 		DC_LOG_I2C_AUX("WRITE: addr:0x%x  value:0x%x Result:%d",
 				request->payload.address,
 				request->payload.data[0],

drivers/gpu/drm/amd/display/dc/i2caux/dce110/aux_engine_dce110.c

@@ -24,6 +24,7 @@
  */
 
 #include "dm_services.h"
+#include "dm_event_log.h"
 
 /*
  * Pre-requisites: headers required by header of this unit
@@ -273,6 +274,8 @@ static void submit_channel_request(
 	REG_WAIT(AUX_SW_STATUS, AUX_SW_DONE, 0,
 				10, aux110->timeout_period/10);
 	REG_UPDATE(AUX_SW_CONTROL, AUX_SW_GO, 1);
+	EVENT_LOG_AUX_REQ(engine->base.ddc->pin_data->en, Native, request->action,
+					request->address, request->length, request->data);
 }
 
 static int read_channel_reply(struct aux_engine *engine, uint32_t size,
@@ -336,7 +339,9 @@ static void process_channel_reply(
 	uint32_t sw_status;
 
 	bytes_replied = read_channel_reply(engine, reply->length, reply->data,
-					   &reply_result, &sw_status);
+						&reply_result, &sw_status);
+	EVENT_LOG_AUX_Reply(engine->base.ddc->pin_data->en, Native,
+					sw_status, reply_result, bytes_replied, reply->data);
 
 	/* in case HPD is LOW, exit AUX transaction */
 	if ((sw_status & AUX_SW_STATUS__AUX_SW_HPD_DISCON_MASK)) {

drivers/gpu/drm/amd/display/dc/i2caux/i2c_hw_engine.c

@@ -24,6 +24,7 @@
  */
 
 #include "dm_services.h"
+#include "dm_event_log.h"
 
 /*
  * Pre-requisites: headers required by header of this unit
@@ -170,6 +171,23 @@ bool dal_i2c_hw_engine_submit_request(
 			process_channel_reply(&hw_engine->base, &reply);
 	}
 
+	if (i2caux_request->operation == I2CAUX_TRANSACTION_READ) {
+		EVENT_LOG_I2CAUX_READ(i2caux_request->payload.address_space,
+							engine->ddc->pin_data->en,
+							i2caux_request->payload.address,
+							i2caux_request->status,
+							i2caux_request->payload.length,
+							i2caux_request->payload.data);
+	} else if (i2caux_request->operation == I2CAUX_TRANSACTION_WRITE) {
+		EVENT_LOG_I2CAUX_WRITE(i2caux_request->payload.address_space,
+							engine->ddc->pin_data->en,
+							i2caux_request->payload.address,
+							i2caux_request->status,
+							i2caux_request->payload.length,
+							i2caux_request->payload.data);
+	}
+
+
 	return result;
 }