amd/dal: I2C Aux Manager

Implements low-level communication layer over I2C and Aux lines using
GPIO handles.

    SW Layer
/===============================================================\
|                                                   Asic        |
|                                                   Capability  |
|                                                               |
|                                                   Adapter     |
|                                                   Service     |
|                                                               |
|---------------------------------------------------------------|
| GPIO                  I2cAux                      BIOS        |
|                       Manager                     Parser      |
|                                                               |
|                                                               |
\===============================================================/
    HW Layer

Signed-off-by: Harry Wentland <harry.wentland@amd.com>

25 files changed, 5553 insertions, 1 deletions

diff --git a/drivers/gpu/drm/amd/dal/Makefile b/drivers/gpu/drm/amd/dal/Makefile
index 4d1ad7e26e7b..97aff90c5b09 100644
--- a/drivers/gpu/drm/amd/dal/Makefile
+++ b/drivers/gpu/drm/amd/dal/Makefile
@@ -7,7 +7,7 @@ AMDDALPATH = $(RELATIVE_AMD_DAL_PATH)
 
 subdir-ccflags-y += -I$(AMDDALPATH)/ -I$(AMDDALPATH)/include -DDAL_CZ_BRINGUP
 
-DAL_LIBS = adapter amdgpu_dm asic_capability basics bios gpio
+DAL_LIBS = adapter amdgpu_dm asic_capability basics bios gpio i2caux
 
 AMD_DAL = $(addsuffix /Makefile, $(addprefix $(FULL_AMD_DAL_PATH)/,$(DAL_LIBS)))
 
diff --git a/drivers/gpu/drm/amd/dal/i2caux/Makefile b/drivers/gpu/drm/amd/dal/i2caux/Makefile
new file mode 100644
index 000000000000..69ed228636d4
--- /dev/null
+++ b/drivers/gpu/drm/amd/dal/i2caux/Makefile
@@ -0,0 +1,22 @@
+#
+# Makefile for the 'i2c' sub-component of DAL.
+# It provides the control and status of HW i2c engine of the adapter.
+
+I2CAUX = i2caux.o engine.o i2c_engine.o i2c_hw_engine.o \
+	i2c_generic_hw_engine.o i2c_sw_engine.o aux_engine.o
+
+AMD_DAL_I2CAUX = $(addprefix $(AMDDALPATH)/i2caux/,$(I2CAUX))
+
+AMD_DAL_FILES += $(AMD_DAL_I2CAUX)
+
+###############################################################################
+# DCE 11x family
+###############################################################################
+ifdef CONFIG_DRM_AMD_DAL_DCE11_0
+I2CAUX_DCE110 = i2caux_dce110.o i2c_sw_engine_dce110.o i2c_hw_engine_dce110.o \
+	aux_engine_dce110.o
+
+AMD_DAL_I2CAUX_DCE110 = $(addprefix $(AMDDALPATH)/i2caux/dce110/,$(I2CAUX_DCE110))
+
+AMD_DAL_FILES += $(AMD_DAL_I2CAUX_DCE110)
+endif
diff --git a/drivers/gpu/drm/amd/dal/i2caux/aux_engine.c b/drivers/gpu/drm/amd/dal/i2caux/aux_engine.c
new file mode 100644
index 000000000000..892bb7791643
--- /dev/null
+++ b/drivers/gpu/drm/amd/dal/i2caux/aux_engine.c
@@ -0,0 +1,567 @@
+/*
+ * Copyright 2012-15 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 "dal_services.h"
+
+/*
+ * Pre-requisites: headers required by header of this unit
+ */
+
+#include "include/i2caux_interface.h"
+#include "engine.h"
+
+/*
+ * Header of this unit
+ */
+
+#include "aux_engine.h"
+
+/*
+ * Post-requisites: headers required by this unit
+ */
+
+#include "include/link_service_types.h"
+
+/*
+ * This unit
+ */
+
+enum {
+	AUX_INVALID_REPLY_RETRY_COUNTER = 1,
+	AUX_TIMED_OUT_RETRY_COUNTER = 2,
+	AUX_DEFER_RETRY_COUNTER = 6
+};
+
+#define FROM_ENGINE(ptr) \
+	container_of((ptr), struct aux_engine, base)
+
+enum i2caux_engine_type dal_aux_engine_get_engine_type(
+	const struct engine *engine)
+{
+	return I2CAUX_ENGINE_TYPE_AUX;
+}
+
+bool dal_aux_engine_acquire(
+	struct engine *engine,
+	struct ddc *ddc)
+{
+	struct aux_engine *aux_engine = FROM_ENGINE(engine);
+
+	enum gpio_result result;
+
+	result = dal_ddc_open(ddc, GPIO_MODE_HARDWARE,
+		GPIO_DDC_CONFIG_TYPE_MODE_AUX);
+
+	if (result != GPIO_RESULT_OK)
+		return false;
+
+	if (!aux_engine->funcs->acquire_engine(aux_engine)) {
+		dal_ddc_close(ddc);
+		return false;
+	}
+
+	engine->ddc = ddc;
+
+	return true;
+}
+
+struct read_command_context {
+	uint8_t *buffer;
+	uint8_t current_read_length;
+	uint32_t offset;
+	enum i2caux_transaction_status status;
+
+	struct aux_request_transaction_data request;
+	struct aux_reply_transaction_data reply;
+
+	uint8_t returned_byte;
+
+	uint32_t timed_out_retry_aux;
+	uint32_t invalid_reply_retry_aux;
+	uint32_t defer_retry_aux;
+	uint32_t defer_retry_i2c;
+	uint32_t invalid_reply_retry_aux_on_ack;
+
+	bool transaction_complete;
+	bool operation_succeeded;
+};
+
+static void process_read_reply(
+	struct aux_engine *engine,
+	struct read_command_context *ctx)
+{
+	engine->funcs->process_channel_reply(engine, &ctx->reply);
+
+	switch (ctx->reply.status) {
+	case AUX_TRANSACTION_REPLY_AUX_ACK:
+		ctx->defer_retry_aux = 0;
+		if (ctx->returned_byte > ctx->current_read_length) {
+			ctx->status =
+				I2CAUX_TRANSACTION_STATUS_FAILED_PROTOCOL_ERROR;
+			ctx->operation_succeeded = false;
+		} else if (ctx->returned_byte < ctx->current_read_length) {
+			ctx->current_read_length -= ctx->returned_byte;
+
+			ctx->offset += ctx->returned_byte;
+
+			++ctx->invalid_reply_retry_aux_on_ack;
+
+			if (ctx->invalid_reply_retry_aux_on_ack >
+				AUX_INVALID_REPLY_RETRY_COUNTER) {
+				ctx->status =
+				I2CAUX_TRANSACTION_STATUS_FAILED_PROTOCOL_ERROR;
+				ctx->operation_succeeded = false;
+			}
+		} else {
+			ctx->status = I2CAUX_TRANSACTION_STATUS_SUCCEEDED;
+			ctx->transaction_complete = true;
+			ctx->operation_succeeded = true;
+		}
+	break;
+	case AUX_TRANSACTION_REPLY_AUX_NACK:
+		ctx->status = I2CAUX_TRANSACTION_STATUS_FAILED_NACK;
+		ctx->operation_succeeded = false;
+	break;
+	case AUX_TRANSACTION_REPLY_AUX_DEFER:
+		++ctx->defer_retry_aux;
+
+		if (ctx->defer_retry_aux > AUX_DEFER_RETRY_COUNTER) {
+			ctx->status = I2CAUX_TRANSACTION_STATUS_FAILED_TIMEOUT;
+			ctx->operation_succeeded = false;
+		}
+	break;
+	case AUX_TRANSACTION_REPLY_I2C_DEFER:
+		ctx->defer_retry_aux = 0;
+
+		++ctx->defer_retry_i2c;
+
+		if (ctx->defer_retry_i2c > AUX_DEFER_RETRY_COUNTER) {
+			ctx->status = I2CAUX_TRANSACTION_STATUS_FAILED_TIMEOUT;
+			ctx->operation_succeeded = false;
+		}
+	break;
+	default:
+		ctx->status = I2CAUX_TRANSACTION_STATUS_UNKNOWN;
+		ctx->operation_succeeded = false;
+	}
+}
+
+static void process_read_request(
+	struct aux_engine *engine,
+	struct read_command_context *ctx)
+{
+	enum aux_channel_operation_result operation_result;
+
+	engine->funcs->submit_channel_request(engine, &ctx->request);
+
+	operation_result = engine->funcs->get_channel_status(
+		engine, &ctx->returned_byte);
+
+	switch (operation_result) {
+	case AUX_CHANNEL_OPERATION_SUCCEEDED:
+		if (ctx->returned_byte > ctx->current_read_length) {
+			ctx->status =
+				I2CAUX_TRANSACTION_STATUS_FAILED_PROTOCOL_ERROR;
+			ctx->operation_succeeded = false;
+		} else {
+			ctx->timed_out_retry_aux = 0;
+			ctx->invalid_reply_retry_aux = 0;
+
+			ctx->reply.length = ctx->returned_byte;
+			ctx->reply.data = ctx->buffer;
+
+			process_read_reply(engine, ctx);
+		}
+	break;
+	case AUX_CHANNEL_OPERATION_FAILED_INVALID_REPLY:
+		++ctx->invalid_reply_retry_aux;
+
+		if (ctx->invalid_reply_retry_aux >
+			AUX_INVALID_REPLY_RETRY_COUNTER) {
+			ctx->status =
+				I2CAUX_TRANSACTION_STATUS_FAILED_PROTOCOL_ERROR;
+			ctx->operation_succeeded = false;
+		} else
+			dal_delay_in_microseconds(400);
+	break;
+	case AUX_CHANNEL_OPERATION_FAILED_TIMEOUT:
+		++ctx->timed_out_retry_aux;
+
+		if (ctx->timed_out_retry_aux > AUX_TIMED_OUT_RETRY_COUNTER) {
+			ctx->status = I2CAUX_TRANSACTION_STATUS_FAILED_TIMEOUT;
+			ctx->operation_succeeded = false;
+		} else {
+			/* DP 1.2a, table 2-58:
+			 * "S3: AUX Request CMD PENDING:
+			 * retry 3 times, with 400usec wait on each"
+			 * The HW timeout is set to 550usec,
+			 * so we should not wait here */
+		}
+	break;
+	default:
+		ctx->status = I2CAUX_TRANSACTION_STATUS_UNKNOWN;
+		ctx->operation_succeeded = false;
+	}
+}
+
+static bool read_command(
+	struct aux_engine *engine,
+	struct i2caux_transaction_request *request,
+	bool middle_of_transaction)
+{
+	struct read_command_context ctx;
+
+	ctx.buffer = request->payload.data;
+	ctx.current_read_length = request->payload.length;
+	ctx.offset = 0;
+	ctx.timed_out_retry_aux = 0;
+	ctx.invalid_reply_retry_aux = 0;
+	ctx.defer_retry_aux = 0;
+	ctx.defer_retry_i2c = 0;
+	ctx.invalid_reply_retry_aux_on_ack = 0;
+	ctx.transaction_complete = false;
+	ctx.operation_succeeded = true;
+
+	if (request->payload.address_space ==
+		I2CAUX_TRANSACTION_ADDRESS_SPACE_DPCD) {
+		ctx.request.type = AUX_TRANSACTION_TYPE_DP;
+		ctx.request.action = I2CAUX_TRANSACTION_ACTION_DP_READ;
+		ctx.request.address = request->payload.address;
+	} else if (request->payload.address_space ==
+		I2CAUX_TRANSACTION_ADDRESS_SPACE_I2C) {
+		ctx.request.type = AUX_TRANSACTION_TYPE_I2C;
+		ctx.request.action = middle_of_transaction ?
+			I2CAUX_TRANSACTION_ACTION_I2C_READ_MOT :
+			I2CAUX_TRANSACTION_ACTION_I2C_READ;
+		ctx.request.address = request->payload.address >> 1;
+	} else {
+		/* in DAL2, there was no return in such case */
+		BREAK_TO_DEBUGGER();
+		return false;
+	}
+
+	ctx.request.delay = 0;
+
+	do {
+		dal_memset(ctx.buffer + ctx.offset, 0, ctx.current_read_length);
+
+		ctx.request.data = ctx.buffer + ctx.offset;
+		ctx.request.length = ctx.current_read_length;
+
+		process_read_request(engine, &ctx);
+
+		request->status = ctx.status;
+
+		if (ctx.operation_succeeded && !ctx.transaction_complete)
+			if (ctx.request.type == AUX_TRANSACTION_TYPE_I2C)
+				dal_sleep_in_milliseconds(engine->delay);
+	} while (ctx.operation_succeeded && !ctx.transaction_complete);
+
+	return ctx.operation_succeeded;
+}
+
+struct write_command_context {
+	bool mot;
+
+	uint8_t *buffer;
+	uint8_t current_write_length;
+	enum i2caux_transaction_status status;
+
+	struct aux_request_transaction_data request;
+	struct aux_reply_transaction_data reply;
+
+	uint8_t returned_byte;
+
+	uint32_t timed_out_retry_aux;
+	uint32_t invalid_reply_retry_aux;
+	uint32_t defer_retry_aux;
+	uint32_t defer_retry_i2c;
+	uint32_t max_defer_retry;
+	uint32_t ack_m_retry;
+
+	uint8_t reply_data[DEFAULT_AUX_MAX_DATA_SIZE];
+
+	bool transaction_complete;
+	bool operation_succeeded;
+};
+
+static void process_write_reply(
+	struct aux_engine *engine,
+	struct write_command_context *ctx)
+{
+	engine->funcs->process_channel_reply(engine, &ctx->reply);
+
+	switch (ctx->reply.status) {
+	case AUX_TRANSACTION_REPLY_AUX_ACK:
+		ctx->operation_succeeded = true;
+
+		if (ctx->returned_byte) {
+			ctx->request.action = ctx->mot ?
+			I2CAUX_TRANSACTION_ACTION_I2C_STATUS_REQUEST_MOT :
+			I2CAUX_TRANSACTION_ACTION_I2C_STATUS_REQUEST;
+
+			ctx->current_write_length = 0;
+
+			++ctx->ack_m_retry;
+
+			if (ctx->ack_m_retry > AUX_DEFER_RETRY_COUNTER) {
+				ctx->status =
+				I2CAUX_TRANSACTION_STATUS_FAILED_TIMEOUT;
+				ctx->operation_succeeded = false;
+			} else
+				dal_delay_in_microseconds(300);
+		} else {
+			ctx->status = I2CAUX_TRANSACTION_STATUS_SUCCEEDED;
+			ctx->defer_retry_aux = 0;
+			ctx->ack_m_retry = 0;
+			ctx->transaction_complete = true;
+		}
+	break;
+	case AUX_TRANSACTION_REPLY_AUX_NACK:
+		ctx->status = I2CAUX_TRANSACTION_STATUS_FAILED_NACK;
+		ctx->operation_succeeded = false;
+	break;
+	case AUX_TRANSACTION_REPLY_AUX_DEFER:
+		++ctx->defer_retry_aux;
+
+		if (ctx->defer_retry_aux > ctx->max_defer_retry) {
+			ctx->status = I2CAUX_TRANSACTION_STATUS_FAILED_TIMEOUT;
+			ctx->operation_succeeded = false;
+		}
+	break;
+	case AUX_TRANSACTION_REPLY_I2C_DEFER:
+		ctx->defer_retry_aux = 0;
+		ctx->current_write_length = 0;
+
+		ctx->request.action = ctx->mot ?
+			I2CAUX_TRANSACTION_ACTION_I2C_STATUS_REQUEST_MOT :
+			I2CAUX_TRANSACTION_ACTION_I2C_STATUS_REQUEST;
+
+		++ctx->defer_retry_i2c;
+
+		if (ctx->defer_retry_i2c > ctx->max_defer_retry) {
+			ctx->status = I2CAUX_TRANSACTION_STATUS_FAILED_TIMEOUT;
+			ctx->operation_succeeded = false;
+		}
+	break;
+	default:
+		ctx->status = I2CAUX_TRANSACTION_STATUS_UNKNOWN;
+		ctx->operation_succeeded = false;
+	}
+}
+
+static void process_write_request(
+	struct aux_engine *engine,
+	struct write_command_context *ctx)
+{
+	enum aux_channel_operation_result operation_result;
+
+	engine->funcs->submit_channel_request(engine, &ctx->request);
+
+	operation_result = engine->funcs->get_channel_status(
+		engine, &ctx->returned_byte);
+
+	switch (operation_result) {
+	case AUX_CHANNEL_OPERATION_SUCCEEDED:
+		ctx->timed_out_retry_aux = 0;
+		ctx->invalid_reply_retry_aux = 0;
+
+		ctx->reply.length = ctx->returned_byte;
+		ctx->reply.data = ctx->reply_data;
+
+		process_write_reply(engine, ctx);
+	break;
+	case AUX_CHANNEL_OPERATION_FAILED_INVALID_REPLY:
+		++ctx->invalid_reply_retry_aux;
+
+		if (ctx->invalid_reply_retry_aux >
+			AUX_INVALID_REPLY_RETRY_COUNTER) {
+			ctx->status =
+				I2CAUX_TRANSACTION_STATUS_FAILED_PROTOCOL_ERROR;
+			ctx->operation_succeeded = false;
+		} else
+			dal_delay_in_microseconds(400);
+	break;
+	case AUX_CHANNEL_OPERATION_FAILED_TIMEOUT:
+		++ctx->timed_out_retry_aux;
+
+		if (ctx->timed_out_retry_aux > AUX_TIMED_OUT_RETRY_COUNTER) {
+			ctx->status = I2CAUX_TRANSACTION_STATUS_FAILED_TIMEOUT;
+			ctx->operation_succeeded = false;
+		} else {
+			/* DP 1.2a, table 2-58:
+			 * "S3: AUX Request CMD PENDING:
+			 * retry 3 times, with 400usec wait on each"
+			 * The HW timeout is set to 550usec,
+			 * so we should not wait here */
+		}
+	break;
+	default:
+		ctx->status = I2CAUX_TRANSACTION_STATUS_UNKNOWN;
+		ctx->operation_succeeded = false;
+	}
+}
+
+static bool write_command(
+	struct aux_engine *engine,
+	struct i2caux_transaction_request *request,
+	bool middle_of_transaction)
+{
+	struct write_command_context ctx;
+
+	ctx.mot = middle_of_transaction;
+	ctx.buffer = request->payload.data;
+	ctx.current_write_length = request->payload.length;
+	ctx.timed_out_retry_aux = 0;
+	ctx.invalid_reply_retry_aux = 0;
+	ctx.defer_retry_aux = 0;
+	ctx.defer_retry_i2c = 0;
+	ctx.ack_m_retry = 0;
+	ctx.transaction_complete = false;
+	ctx.operation_succeeded = true;
+
+	if (request->payload.address_space ==
+		I2CAUX_TRANSACTION_ADDRESS_SPACE_DPCD) {
+		ctx.request.type = AUX_TRANSACTION_TYPE_DP;
+		ctx.request.action = I2CAUX_TRANSACTION_ACTION_DP_WRITE;
+		ctx.request.address = request->payload.address;
+	} else if (request->payload.address_space ==
+		I2CAUX_TRANSACTION_ADDRESS_SPACE_I2C) {
+		ctx.request.type = AUX_TRANSACTION_TYPE_I2C;
+		ctx.request.action = middle_of_transaction ?
+			I2CAUX_TRANSACTION_ACTION_I2C_WRITE_MOT :
+			I2CAUX_TRANSACTION_ACTION_I2C_WRITE;
+		ctx.request.address = request->payload.address >> 1;
+	} else {
+		/* in DAL2, there was no return in such case */
+		BREAK_TO_DEBUGGER();
+		return false;
+	}
+
+	ctx.request.delay = 0;
+
+	ctx.max_defer_retry =
+		(engine->max_defer_write_retry > AUX_DEFER_RETRY_COUNTER) ?
+			engine->max_defer_write_retry : AUX_DEFER_RETRY_COUNTER;
+
+	do {
+		ctx.request.data = ctx.buffer;
+		ctx.request.length = ctx.current_write_length;
+
+		process_write_request(engine, &ctx);
+
+		request->status = ctx.status;
+
+		if (ctx.operation_succeeded && !ctx.transaction_complete)
+			if (ctx.request.type == AUX_TRANSACTION_TYPE_I2C)
+				dal_sleep_in_milliseconds(engine->delay);
+	} while (ctx.operation_succeeded && !ctx.transaction_complete);
+
+	return ctx.operation_succeeded;
+}
+
+static bool end_of_transaction_command(
+	struct aux_engine *engine,
+	struct i2caux_transaction_request *request)
+{
+	struct i2caux_transaction_request dummy_request;
+	uint8_t dummy_data;
+
+	/* [tcheng] We only need to send the stop (read with MOT = 0)
+	 * for I2C-over-Aux, not native AUX */
+
+	if (request->payload.address_space !=
+		I2CAUX_TRANSACTION_ADDRESS_SPACE_I2C)
+		return false;
+
+	dummy_request.operation = request->operation;
+	dummy_request.payload.address_space = request->payload.address_space;
+	dummy_request.payload.address = request->payload.address;
+
+	/* according Syed, it does not need now
+	 * Add a dummy byte due to Analogix/Genesis bug
+	 * where they send one byte along with MOT = 0.
+	 * Ideally this should be 0. */
+
+	dummy_request.payload.length = 0;
+	dummy_request.payload.data = &dummy_data;
+
+	if (request->operation == I2CAUX_TRANSACTION_READ)
+		return read_command(engine, &dummy_request, false);
+	else
+		return write_command(engine, &dummy_request, false);
+
+	/* according Syed, it does not need now DoDummyMOT */
+}
+
+bool dal_aux_engine_submit_request(
+	struct engine *engine,
+	struct i2caux_transaction_request *request,
+	bool middle_of_transaction)
+{
+	struct aux_engine *aux_engine = FROM_ENGINE(engine);
+
+	bool result;
+	bool mot_used = true;
+
+	switch (request->operation) {
+	case I2CAUX_TRANSACTION_READ:
+		result = read_command(aux_engine, request, mot_used);
+	break;
+	case I2CAUX_TRANSACTION_WRITE:
+		result = write_command(aux_engine, request, mot_used);
+	break;
+	default:
+		result = false;
+	}
+
+	/* [tcheng]
+	 * need to send stop for the last transaction to free up the AUX
+	 * if the above command fails, this would be the last transaction */
+
+	if (!middle_of_transaction || !result)
+		end_of_transaction_command(aux_engine, request);
+
+	/* mask AUX interrupt */
+
+	return result;
+}
+
+bool dal_aux_engine_construct(
+	struct aux_engine *engine,
+	struct dal_context *ctx)
+{
+	if (!dal_i2caux_construct_engine(&engine->base, ctx))
+		return false;
+	engine->delay = 0;
+	engine->max_defer_write_retry = 0;
+	return true;
+}
+
+void dal_aux_engine_destruct(
+	struct aux_engine *engine)
+{
+	dal_i2caux_destruct_engine(&engine->base);
+}
diff --git a/drivers/gpu/drm/amd/dal/i2caux/aux_engine.h b/drivers/gpu/drm/amd/dal/i2caux/aux_engine.h
new file mode 100644
index 000000000000..af0abdd27389
--- /dev/null
+++ b/drivers/gpu/drm/amd/dal/i2caux/aux_engine.h
@@ -0,0 +1,119 @@
+/*
+ * Copyright 2012-15 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
+ *
+ */
+
+#ifndef __DAL_AUX_ENGINE_H__
+#define __DAL_AUX_ENGINE_H__
+
+enum aux_transaction_type {
+	AUX_TRANSACTION_TYPE_DP,
+	AUX_TRANSACTION_TYPE_I2C
+};
+
+struct aux_request_transaction_data {
+	enum aux_transaction_type type;
+	enum i2caux_transaction_action action;
+	/* 20-bit AUX channel transaction address */
+	uint32_t address;
+	/* delay, in 100-microsecond units */
+	uint8_t delay;
+	uint8_t length;
+	uint8_t *data;
+};
+
+enum aux_transaction_reply {
+	AUX_TRANSACTION_REPLY_AUX_ACK = 0x00,
+	AUX_TRANSACTION_REPLY_AUX_NACK = 0x01,
+	AUX_TRANSACTION_REPLY_AUX_DEFER = 0x02,
+
+	AUX_TRANSACTION_REPLY_I2C_ACK = 0x00,
+	AUX_TRANSACTION_REPLY_I2C_NACK = 0x10,
+	AUX_TRANSACTION_REPLY_I2C_DEFER = 0x20,
+
+	AUX_TRANSACTION_REPLY_INVALID = 0xFF
+};
+
+struct aux_reply_transaction_data {
+	enum aux_transaction_reply status;
+	uint8_t length;
+	uint8_t *data;
+};
+
+enum aux_channel_operation_result {
+	AUX_CHANNEL_OPERATION_SUCCEEDED,
+	AUX_CHANNEL_OPERATION_FAILED_REASON_UNKNOWN,
+	AUX_CHANNEL_OPERATION_FAILED_INVALID_REPLY,
+	AUX_CHANNEL_OPERATION_FAILED_TIMEOUT
+};
+
+struct aux_engine;
+
+struct aux_engine_funcs {
+	void (*destroy)(
+		struct aux_engine **ptr);
+	bool (*acquire_engine)(
+		struct aux_engine *engine);
+	void (*configure)(
+		struct aux_engine *engine,
+		union aux_config cfg);
+	bool (*start_gtc_sync)(
+		struct aux_engine *engine);
+	void (*stop_gtc_sync)(
+		struct aux_engine *engine);
+	void (*submit_channel_request)(
+		struct aux_engine *engine,
+		struct aux_request_transaction_data *request);
+	void (*process_channel_reply)(
+		struct aux_engine *engine,
+		struct aux_reply_transaction_data *reply);
+	enum aux_channel_operation_result (*get_channel_status)(
+		struct aux_engine *engine,
+		uint8_t *returned_bytes);
+};
+
+struct aux_engine {
+	struct engine base;
+	const struct aux_engine_funcs *funcs;
+	/* following values are expressed in milliseconds */
+	uint32_t delay;
+	uint32_t max_defer_write_retry;
+};
+
+bool dal_aux_engine_construct(
+	struct aux_engine *engine,
+	struct dal_context *ctx);
+
+void dal_aux_engine_destruct(
+	struct aux_engine *engine);
+bool dal_aux_engine_submit_request(
+	struct engine *ptr,
+	struct i2caux_transaction_request *request,
+	bool middle_of_transaction);
+bool dal_aux_engine_acquire(
+	struct engine *ptr,
+	struct ddc *ddc);
+enum i2caux_engine_type dal_aux_engine_get_engine_type(
+	const struct engine *engine);
+
+#endif
diff --git a/drivers/gpu/drm/amd/dal/i2caux/dce110/aux_engine_dce110.c b/drivers/gpu/drm/amd/dal/i2caux/dce110/aux_engine_dce110.c
new file mode 100644
index 000000000000..8b7329d4d576
--- /dev/null
+++ b/drivers/gpu/drm/amd/dal/i2caux/dce110/aux_engine_dce110.c
@@ -0,0 +1,788 @@
+/*
+ * Copyright 2012-15 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 "dal_services.h"
+
+/*
+ * Pre-requisites: headers required by header of this unit
+ */
+
+#include "include/i2caux_interface.h"
+#include "../engine.h"
+#include "../aux_engine.h"
+
+/*
+ * Header of this unit
+ */
+
+#include "aux_engine_dce110.h"
+
+/*
+ * Post-requisites: headers required by this unit
+ */
+#include "dce/dce_11_0_d.h"
+#include "dce/dce_11_0_sh_mask.h"
+
+/*
+ * This unit
+ */
+
+/*
+ * @brief
+ * Cast 'struct aux_engine *'
+ * to 'struct aux_engine_dce110 *'
+ */
+#define FROM_AUX_ENGINE(ptr) \
+	container_of((ptr), struct aux_engine_dce110, base)
+
+/*
+ * @brief
+ * Cast 'struct engine *'
+ * to 'struct aux_engine_dce110 *'
+ */
+#define FROM_ENGINE(ptr) \
+	FROM_AUX_ENGINE(container_of((ptr), struct aux_engine, base))
+
+static void release_engine(
+	struct engine *engine)
+{
+	struct aux_engine_dce110 *aux_engine = FROM_ENGINE(engine);
+
+	const uint32_t addr = aux_engine->addr.aux_arb_control;
+
+	uint32_t value = dal_read_reg(engine->ctx, addr);
+
+	set_reg_field_value(
+		value,
+		1,
+		AUX_ARB_CONTROL,
+		AUX_SW_DONE_USING_AUX_REG);
+
+	dal_write_reg(engine->ctx, addr, value);
+}
+
+static void destruct(
+	struct aux_engine_dce110 *engine);
+
+static void destroy(
+	struct aux_engine **aux_engine)
+{
+	struct aux_engine_dce110 *engine = FROM_AUX_ENGINE(*aux_engine);
+
+	destruct(engine);
+
+	dal_free(engine);
+
+	*aux_engine = NULL;
+}
+
+#define SW_CAN_ACCESS_AUX 1
+
+static bool acquire_engine(
+	struct aux_engine *engine)
+{
+	struct aux_engine_dce110 *aux_engine = FROM_AUX_ENGINE(engine);
+	uint32_t value;
+	uint32_t field;
+
+	/* enable AUX before request SW to access AUX */
+	{
+		const uint32_t addr = aux_engine->addr.aux_control;
+
+		value = dal_read_reg(engine->base.ctx, addr);
+
+		field = get_reg_field_value(
+				value,
+				AUX_CONTROL,
+				AUX_EN);
+
+		if (field == 0) {
+			uint8_t counter = 0;
+
+			set_reg_field_value(
+				value,
+				1,
+				AUX_CONTROL,
+				AUX_EN);
+
+			/*DP_AUX block as part of the enable sequence*/
+			set_reg_field_value(
+				value,
+				1,
+				AUX_CONTROL,
+				AUX_RESET);
+
+			dal_write_reg(engine->base.ctx, addr, value);
+
+			/*poll HW to make sure reset it done*/
+			do {
+				dal_delay_in_microseconds(1);
+
+				value = dal_read_reg(engine->base.ctx, addr);
+
+				field = get_reg_field_value(
+						value,
+						AUX_CONTROL,
+						AUX_RESET_DONE);
+
+				counter++;
+
+			} while ((field == 0) && (counter < 11));
+
+			set_reg_field_value(
+				value,
+				0,
+				AUX_CONTROL,
+				AUX_RESET);
+
+			dal_write_reg(engine->base.ctx, addr, value);
+
+			counter = 0;
+
+			do {
+				dal_delay_in_microseconds(1);
+
+				value = dal_read_reg(engine->base.ctx, addr);
+
+				field = get_reg_field_value(
+						value,
+						AUX_CONTROL,
+						AUX_RESET_DONE);
+
+				counter++;
+
+			} while ((field == 1) && (counter < 11));
+		} /*if (field)*/
+	}
+
+	/* request SW to access AUX */
+	{
+		const uint32_t addr = aux_engine->addr.aux_arb_control;
+
+		value = dal_read_reg(engine->base.ctx, addr);
+
+		set_reg_field_value(
+			value,
+			1,
+			AUX_ARB_CONTROL,
+			AUX_SW_USE_AUX_REG_REQ);
+
+		dal_write_reg(engine->base.ctx, addr, value);
+
+		value = dal_read_reg(engine->base.ctx, addr);
+
+		field = get_reg_field_value(
+				value,
+				AUX_ARB_CONTROL,
+				AUX_REG_RW_CNTL_STATUS);
+
+		return field == SW_CAN_ACCESS_AUX;
+	}
+}
+
+static void configure(
+	struct aux_engine *engine,
+	union aux_config cfg)
+{
+	struct aux_engine_dce110 *aux_engine = FROM_AUX_ENGINE(engine);
+
+	const uint32_t addr = aux_engine->addr.aux_control;
+
+	uint32_t value = dal_read_reg(engine->base.ctx, addr);
+
+	set_reg_field_value(
+		value,
+		(0 != cfg.bits.ALLOW_AUX_WHEN_HPD_LOW),
+		AUX_CONTROL,
+		AUX_IGNORE_HPD_DISCON);
+
+	dal_write_reg(engine->base.ctx, addr, value);
+}
+
+static bool start_gtc_sync(
+	struct aux_engine *engine)
+{
+	/*TODO*/
+	return false;
+}
+
+static void stop_gtc_sync(
+	struct aux_engine *engine)
+{
+	/*TODO*/
+}
+
+#define COMPOSE_AUX_SW_DATA_16_20(command, address) \
+	((command) | ((0xF0000 & (address)) >> 16))
+
+#define COMPOSE_AUX_SW_DATA_8_15(address) \
+	((0xFF00 & (address)) >> 8)
+
+#define COMPOSE_AUX_SW_DATA_0_7(address) \
+	(0xFF & (address))
+
+static void submit_channel_request(
+	struct aux_engine *engine,
+	struct aux_request_transaction_data *request)
+{
+	struct aux_engine_dce110 *aux_engine = FROM_AUX_ENGINE(engine);
+	uint32_t value;
+	uint32_t length;
+
+	bool is_write =
+		((request->type == AUX_TRANSACTION_TYPE_DP) &&
+		 (request->action == I2CAUX_TRANSACTION_ACTION_DP_WRITE)) ||
+		((request->type == AUX_TRANSACTION_TYPE_I2C) &&
+		((request->action == I2CAUX_TRANSACTION_ACTION_I2C_WRITE) ||
+		 (request->action == I2CAUX_TRANSACTION_ACTION_I2C_WRITE_MOT)));
+
+	/* clear_aux_error */
+	{
+		const uint32_t addr = mmAUXN_IMPCAL;
+
+		value = dal_read_reg(engine->base.ctx, addr);
+
+		set_reg_field_value(
+			value,
+			1,
+			AUXN_IMPCAL,
+			AUXN_CALOUT_ERROR_AK);
+
+		dal_write_reg(engine->base.ctx, addr, value);
+
+		set_reg_field_value(
+			value,
+			0,
+			AUXN_IMPCAL,
+			AUXN_CALOUT_ERROR_AK);
+
+		dal_write_reg(engine->base.ctx, addr, value);
+	}
+	{
+		const uint32_t addr = mmAUXP_IMPCAL;
+
+		value = dal_read_reg(engine->base.ctx, addr);
+
+		set_reg_field_value(
+			value,
+			1,
+			AUXP_IMPCAL,
+			AUXP_CALOUT_ERROR_AK);
+
+		dal_write_reg(engine->base.ctx, addr, value);
+
+		set_reg_field_value(
+			value,
+			0,
+			AUXP_IMPCAL,
+			AUXP_CALOUT_ERROR_AK);
+
+		dal_write_reg(engine->base.ctx, addr, value);
+	}
+
+	/* force_default_calibrate */
+	{
+		const uint32_t addr = mmAUXN_IMPCAL;
+
+		value = dal_read_reg(engine->base.ctx, addr);
+
+		set_reg_field_value(
+			value,
+			1,
+			AUXN_IMPCAL,
+			AUXN_IMPCAL_ENABLE);
+
+		dal_write_reg(engine->base.ctx, addr, value);
+
+		set_reg_field_value(
+			value,
+			0,
+			AUXN_IMPCAL,
+			AUXN_IMPCAL_OVERRIDE_ENABLE);
+
+		dal_write_reg(engine->base.ctx, addr, value);
+	}
+	{
+		const uint32_t addr = mmAUXP_IMPCAL;
+
+		value = dal_read_reg(engine->base.ctx, addr);
+
+		set_reg_field_value(
+			value,
+			1,
+			AUXP_IMPCAL,
+			AUXP_IMPCAL_OVERRIDE_ENABLE);
+
+		dal_write_reg(engine->base.ctx, addr, value);
+
+		set_reg_field_value(
+			value,
+			0,
+			AUXP_IMPCAL,
+			AUXP_IMPCAL_OVERRIDE_ENABLE);
+
+		dal_write_reg(engine->base.ctx, addr, value);
+	}
+
+	/* set the delay and the number of bytes to write */
+	{
+		const uint32_t addr = aux_engine->addr.aux_sw_control;
+
+		value = dal_read_reg(engine->base.ctx, addr);
+
+		set_reg_field_value(
+			value,
+			request->delay,
+			AUX_SW_CONTROL,
+			AUX_SW_START_DELAY);
+
+		/* The length include
+		 * the 4 bit header and the 20 bit address
+		 * (that is 3 byte).
+		 * If the requested length is non zero this means
+		 * an addition byte specifying the length is required. */
+
+		length = request->length ? 4 : 3;
+		if (is_write)
+			length += request->length;
+
+		set_reg_field_value(
+			value,
+			length,
+			AUX_SW_CONTROL,
+			AUX_SW_WR_BYTES);
+
+		dal_write_reg(engine->base.ctx, addr, value);
+	}
+
+	/* program action and address and payload data (if 'is_write') */
+	{
+		const uint32_t addr = aux_engine->addr.aux_sw_data;
+
+		value = dal_read_reg(engine->base.ctx, addr);
+
+		set_reg_field_value(
+			value,
+			0,
+			AUX_SW_DATA,
+			AUX_SW_INDEX);
+
+		set_reg_field_value(
+			value,
+			0,
+			AUX_SW_DATA,
+			AUX_SW_DATA_RW);
+
+		set_reg_field_value(
+			value,
+			1,
+			AUX_SW_DATA,
+			AUX_SW_AUTOINCREMENT_DISABLE);
+
+		set_reg_field_value(
+			value,
+			COMPOSE_AUX_SW_DATA_16_20(
+				request->action, request->address),
+			AUX_SW_DATA,
+			AUX_SW_DATA);
+
+		dal_write_reg(engine->base.ctx, addr, value);
+
+		set_reg_field_value(
+			value,
+			0,
+			AUX_SW_DATA,
+			AUX_SW_AUTOINCREMENT_DISABLE);
+
+		set_reg_field_value(
+			value,
+			COMPOSE_AUX_SW_DATA_8_15(request->address),
+			AUX_SW_DATA,
+			AUX_SW_DATA);
+
+		dal_write_reg(engine->base.ctx, addr, value);
+
+		set_reg_field_value(
+			value,
+			COMPOSE_AUX_SW_DATA_0_7(request->address),
+			AUX_SW_DATA,
+			AUX_SW_DATA);
+
+		dal_write_reg(engine->base.ctx, addr, value);
+
+		if (request->length) {
+			set_reg_field_value(
+				value,
+				request->length - 1,
+				AUX_SW_DATA,
+				AUX_SW_DATA);
+
+			dal_write_reg(engine->base.ctx, addr, value);
+		}
+
+		if (is_write) {
+			/* Load the HW buffer with the Data to be sent.
+			 * This is relevant for write operation.
+			 * For read, the data recived data will be
+			 * processed in process_channel_reply(). */
+			uint32_t i = 0;
+
+			while (i < request->length) {
+
+				set_reg_field_value(
+					value,
+					request->data[i],
+					AUX_SW_DATA,
+					AUX_SW_DATA);
+
+				dal_write_reg(
+					engine->base.ctx, addr, value);
+
+				++i;
+			}
+		}
+	}
+
+	{
+		const uint32_t addr = aux_engine->addr.aux_interrupt_control;
+
+		value = dal_read_reg(engine->base.ctx, addr);
+
+		set_reg_field_value(
+			value,
+			1,
+			AUX_INTERRUPT_CONTROL,
+			AUX_SW_DONE_ACK);
+
+		dal_write_reg(engine->base.ctx, addr, value);
+	}
+
+	{
+		const uint32_t addr = aux_engine->addr.aux_sw_control;
+
+		value = dal_read_reg(engine->base.ctx, addr);
+
+		set_reg_field_value(
+			value,
+			1,
+			AUX_SW_CONTROL,
+			AUX_SW_GO);
+
+		dal_write_reg(engine->base.ctx, addr, value);
+	}
+}
+
+static void process_channel_reply(
+	struct aux_engine *engine,
+	struct aux_reply_transaction_data *reply)
+{
+	struct aux_engine_dce110 *aux_engine = FROM_AUX_ENGINE(engine);
+
+	/* Need to do a read to get the number of bytes to process
+	 * Alternatively, this information can be passed -
+	 * but that causes coupling which isn't good either. */
+
+	uint32_t bytes_replied;
+	uint32_t value;
+
+	{
+		const uint32_t addr = aux_engine->addr.aux_sw_status;
+
+		value = dal_read_reg(engine->base.ctx, addr);
+
+		bytes_replied = get_reg_field_value(
+				value,
+				AUX_SW_STATUS,
+				AUX_SW_REPLY_BYTE_COUNT);
+	}
+
+	if (bytes_replied) {
+		uint32_t reply_result;
+
+		const uint32_t addr = aux_engine->addr.aux_sw_data;
+
+		value = dal_read_reg(engine->base.ctx, addr);
+
+		set_reg_field_value(
+			value,
+			0,
+			AUX_SW_DATA,
+			AUX_SW_INDEX);
+
+		dal_write_reg(engine->base.ctx, addr, value);
+
+		set_reg_field_value(
+			value,
+			1,
+			AUX_SW_DATA,
+			AUX_SW_AUTOINCREMENT_DISABLE);
+
+		dal_write_reg(engine->base.ctx, addr, value);
+
+		set_reg_field_value(
+			value,
+			1,
+			AUX_SW_DATA,
+			AUX_SW_DATA_RW);
+
+		dal_write_reg(engine->base.ctx, addr, value);
+
+		value = dal_read_reg(engine->base.ctx, addr);
+
+		reply_result = get_reg_field_value(
+				value,
+				AUX_SW_DATA,
+				AUX_SW_DATA);
+
+		reply_result = reply_result >> 4;
+
+		switch (reply_result) {
+		case 0: /* ACK */ {
+			uint32_t i = 0;
+
+			/* first byte was already used
+			 * to get the command status */
+			--bytes_replied;
+
+			while (i < bytes_replied) {
+				value = dal_read_reg(
+					engine->base.ctx, addr);
+
+				reply->data[i] = get_reg_field_value(
+						value,
+						AUX_SW_DATA,
+						AUX_SW_DATA);
+
+				++i;
+			}
+
+			reply->status = AUX_TRANSACTION_REPLY_AUX_ACK;
+		}
+		break;
+		case 1: /* NACK */
+			reply->status = AUX_TRANSACTION_REPLY_AUX_NACK;
+		break;
+		case 2: /* DEFER */
+			reply->status = AUX_TRANSACTION_REPLY_AUX_DEFER;
+		break;
+		case 4: /* AUX ACK / I2C NACK */
+			reply->status = AUX_TRANSACTION_REPLY_I2C_NACK;
+		break;
+		case 8: /* AUX ACK / I2C DEFER */
+			reply->status = AUX_TRANSACTION_REPLY_I2C_DEFER;
+		break;
+		default:
+			reply->status = AUX_TRANSACTION_REPLY_INVALID;
+		}
+	} else {
+		/* Need to handle an error case...
+		 * hopefully, upper layer function won't call this function
+		 * if the number of bytes in the reply was 0
+		 * because there was surely an error that was asserted
+		 * that should have been handled
+		 * for hot plug case, this could happens*/
+		if (!(value & AUX_SW_STATUS__AUX_SW_HPD_DISCON_MASK))
+			ASSERT_CRITICAL(false);
+	}
+}
+
+static enum aux_channel_operation_result get_channel_status(
+	struct aux_engine *engine,
+	uint8_t *returned_bytes)
+{
+	struct aux_engine_dce110 *aux_engine = FROM_AUX_ENGINE(engine);
+
+	const uint32_t addr = aux_engine->addr.aux_sw_status;
+
+	uint32_t value;
+	uint32_t aux_sw_done;
+
+	if (returned_bytes == NULL) {
+		/*caller pass NULL pointer*/
+		ASSERT_CRITICAL(false);
+		return AUX_CHANNEL_OPERATION_FAILED_REASON_UNKNOWN;
+	}
+	*returned_bytes = 0;
+
+	/* poll to make sure that SW_DONE is asserted */
+	{
+		uint32_t time_elapsed = 0;
+
+		do {
+			value = dal_read_reg(engine->base.ctx, addr);
+
+			aux_sw_done = get_reg_field_value(
+					value,
+					AUX_SW_STATUS,
+					AUX_SW_DONE);
+
+			if (aux_sw_done)
+				break;
+
+			dal_delay_in_microseconds(10);
+
+			time_elapsed += 10;
+		} while (time_elapsed < aux_engine->timeout_period);
+
+
+	}
+
+	/* Note that the following bits are set in 'status.bits'
+	 * during CTS 4.2.1.2 by CTS reference sink:
+	 * AUX_SW_RX_MIN_COUNT_VIOL, AUX_SW_RX_INVALID_STOP,
+	 * AUX_SW_RX_RECV_NO_DET, AUX_SW_RX_RECV_INVALID_H.
+	 * AUX_SW_RX_MIN_COUNT_VIOL is an internal,
+	 * HW debugging bit and should be ignored. */
+	if (aux_sw_done) {
+		if (get_reg_field_value(
+			value,
+			AUX_SW_STATUS,
+			AUX_SW_RX_TIMEOUT_STATE) ||
+			get_reg_field_value(
+				value,
+				AUX_SW_STATUS,
+				AUX_SW_RX_TIMEOUT))
+			return AUX_CHANNEL_OPERATION_FAILED_TIMEOUT;
+		else if (get_reg_field_value(
+			value,
+			AUX_SW_STATUS,
+			AUX_SW_RX_INVALID_STOP))
+			return AUX_CHANNEL_OPERATION_FAILED_INVALID_REPLY;
+
+		*returned_bytes = get_reg_field_value(
+				value,
+				AUX_SW_STATUS,
+				AUX_SW_REPLY_BYTE_COUNT);
+		if (*returned_bytes == 0)
+			return
+			AUX_CHANNEL_OPERATION_FAILED_INVALID_REPLY;
+		else {
+			*returned_bytes -= 1;
+			return AUX_CHANNEL_OPERATION_SUCCEEDED;
+		}
+	} else {
+		/*time_elapsed >= aux_engine->timeout_period */
+		if (!(value & AUX_SW_STATUS__AUX_SW_HPD_DISCON_MASK))
+			ASSERT_CRITICAL(false);
+		return AUX_CHANNEL_OPERATION_FAILED_TIMEOUT;
+	}
+}
+
+static const int32_t aux_channel_offset[] = {
+	mmDP_AUX0_AUX_CONTROL - mmDP_AUX0_AUX_CONTROL,
+	mmDP_AUX1_AUX_CONTROL - mmDP_AUX0_AUX_CONTROL,
+	mmDP_AUX2_AUX_CONTROL - mmDP_AUX0_AUX_CONTROL,
+	mmDP_AUX3_AUX_CONTROL - mmDP_AUX0_AUX_CONTROL,
+	mmDP_AUX4_AUX_CONTROL - mmDP_AUX0_AUX_CONTROL,
+	mmDP_AUX5_AUX_CONTROL - mmDP_AUX0_AUX_CONTROL
+};
+
+static const struct aux_engine_funcs aux_engine_funcs = {
+	.destroy = destroy,
+	.acquire_engine = acquire_engine,
+	.configure = configure,
+	.start_gtc_sync = start_gtc_sync,
+	.stop_gtc_sync = stop_gtc_sync,
+	.submit_channel_request = submit_channel_request,
+	.process_channel_reply = process_channel_reply,
+	.get_channel_status = get_channel_status,
+};
+
+static const struct engine_funcs engine_funcs = {
+	.release_engine = release_engine,
+	.submit_request = dal_aux_engine_submit_request,
+	.keep_power_up_count = dal_i2caux_keep_power_up_count,
+	.get_engine_type = dal_aux_engine_get_engine_type,
+	.acquire = dal_aux_engine_acquire,
+};
+
+static bool construct(
+	struct aux_engine_dce110 *engine,
+	const struct aux_engine_dce110_init_data *aux_init_data)
+{
+	int32_t offset;
+
+	if (aux_init_data->engine_id >=
+		sizeof(aux_channel_offset) / sizeof(int32_t)) {
+		ASSERT_CRITICAL(false);
+		return false;
+	}
+
+	if (!dal_aux_engine_construct(
+		&engine->base, aux_init_data->ctx)) {
+		ASSERT_CRITICAL(false);
+		return false;
+	}
+	engine->base.base.funcs = &engine_funcs;
+	engine->base.funcs = &aux_engine_funcs;
+	offset = aux_channel_offset[aux_init_data->engine_id];
+	engine->addr.aux_control = mmAUX_CONTROL + offset;
+	engine->addr.aux_arb_control = mmAUX_ARB_CONTROL + offset;
+	engine->addr.aux_sw_data = mmAUX_SW_DATA + offset;
+	engine->addr.aux_sw_control = mmAUX_SW_CONTROL + offset;
+	engine->addr.aux_interrupt_control = mmAUX_INTERRUPT_CONTROL + offset;
+	engine->addr.aux_sw_status = mmAUX_SW_STATUS + offset;
+	engine->addr.aux_gtc_sync_control = mmAUX_GTC_SYNC_CONTROL + offset;
+	engine->addr.aux_gtc_sync_status = mmAUX_GTC_SYNC_STATUS + offset;
+	engine->addr.aux_gtc_sync_controller_status =
+		mmAUX_GTC_SYNC_CONTROLLER_STATUS + offset;
+
+	engine->timeout_period = aux_init_data->timeout_period;
+
+	return true;
+}
+
+static void destruct(
+	struct aux_engine_dce110 *engine)
+{
+	dal_aux_engine_destruct(&engine->base);
+}
+
+struct aux_engine *dal_aux_engine_dce110_create(
+	const struct aux_engine_dce110_init_data *aux_init_data)
+{
+	struct aux_engine_dce110 *engine;
+
+	if (!aux_init_data) {
+		ASSERT_CRITICAL(false);
+		return NULL;
+	}
+
+	engine = dal_alloc(sizeof(*engine));
+
+	if (!engine) {
+		ASSERT_CRITICAL(false);
+		return NULL;
+	}
+
+	if (construct(engine, aux_init_data))
+		return &engine->base;
+
+	ASSERT_CRITICAL(false);
+
+	dal_free(engine);
+
+	return NULL;
+}
diff --git a/drivers/gpu/drm/amd/dal/i2caux/dce110/aux_engine_dce110.h b/drivers/gpu/drm/amd/dal/i2caux/dce110/aux_engine_dce110.h
new file mode 100644
index 000000000000..06f24d541d06
--- /dev/null
+++ b/drivers/gpu/drm/amd/dal/i2caux/dce110/aux_engine_dce110.h
@@ -0,0 +1,56 @@
+/*
+ * Copyright 2012-15 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
+ *
+ */
+
+#ifndef __DAL_AUX_ENGINE_DCE110_H__
+#define __DAL_AUX_ENGINE_DCE110_H__
+
+#include "../aux_engine.h"
+
+struct aux_engine_dce110 {
+	struct aux_engine base;
+	struct {
+		uint32_t aux_control;
+		uint32_t aux_arb_control;
+		uint32_t aux_sw_data;
+		uint32_t aux_sw_control;
+		uint32_t aux_interrupt_control;
+		uint32_t aux_sw_status;
+		uint32_t aux_gtc_sync_control;
+		uint32_t aux_gtc_sync_status;
+		uint32_t aux_gtc_sync_controller_status;
+	} addr;
+	uint32_t timeout_period;
+};
+
+struct aux_engine_dce110_init_data {
+	uint32_t engine_id;
+	uint32_t timeout_period;
+	struct dal_context *ctx;
+};
+
+struct aux_engine *dal_aux_engine_dce110_create(
+	const struct aux_engine_dce110_init_data *aux_init_data);
+
+#endif
diff --git a/drivers/gpu/drm/amd/dal/i2caux/dce110/i2c_generic_hw_engine_dce110.h b/drivers/gpu/drm/amd/dal/i2caux/dce110/i2c_generic_hw_engine_dce110.h
new file mode 100644
index 000000000000..c7c23167da42
--- /dev/null
+++ b/drivers/gpu/drm/amd/dal/i2caux/dce110/i2c_generic_hw_engine_dce110.h
@@ -0,0 +1,24 @@
+/*
+ * Copyright 2012-15 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
+ *
+ */
diff --git a/drivers/gpu/drm/amd/dal/i2caux/dce110/i2c_hw_engine_dce110.c b/drivers/gpu/drm/amd/dal/i2caux/dce110/i2c_hw_engine_dce110.c
new file mode 100644
index 000000000000..ecbba59308b8
--- /dev/null
+++ b/drivers/gpu/drm/amd/dal/i2caux/dce110/i2c_hw_engine_dce110.c
@@ -0,0 +1,953 @@
+/*
+ * Copyright 2012-15 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 "dal_services.h"
+#include "include/logger_interface.h"
+/*
+ * Pre-requisites: headers required by header of this unit
+ */
+
+#include "include/i2caux_interface.h"
+#include "../engine.h"
+#include "../i2c_engine.h"
+#include "../i2c_hw_engine.h"
+#include "../i2c_generic_hw_engine.h"
+/*
+ * Header of this unit
+ */
+
+#include "i2c_hw_engine_dce110.h"
+
+/*
+ * Post-requisites: headers required by this unit
+ */
+#include "dce/dce_11_0_d.h"
+#include "dce/dce_11_0_sh_mask.h"
+
+/*
+ * This unit
+ */
+
+enum dc_i2c_status {
+	DC_I2C_STATUS__DC_I2C_STATUS_IDLE,
+	DC_I2C_STATUS__DC_I2C_STATUS_USED_BY_SW,
+	DC_I2C_STATUS__DC_I2C_STATUS_USED_BY_HW
+};
+
+enum dc_i2c_arbitration {
+	DC_I2C_ARBITRATION__DC_I2C_SW_PRIORITY_NORMAL,
+	DC_I2C_ARBITRATION__DC_I2C_SW_PRIORITY_HIGH
+};
+
+enum {
+	/* No timeout in HW
+	 * (timeout implemented in SW by querying status) */
+	I2C_SETUP_TIME_LIMIT = 255,
+	I2C_HW_BUFFER_SIZE = 144
+};
+
+/*
+ * @brief
+ * Cast pointer to 'struct i2c_hw_engine *'
+ * to pointer 'struct i2c_hw_engine_dce110 *'
+ */
+#define FROM_I2C_HW_ENGINE(ptr) \
+	container_of((ptr), struct i2c_hw_engine_dce110, base)
+/*
+ * @brief
+ * Cast pointer to 'struct i2c_engine *'
+ * to pointer to 'struct i2c_hw_engine_dce110 *'
+ */
+#define FROM_I2C_ENGINE(ptr) \
+	FROM_I2C_HW_ENGINE(container_of((ptr), struct i2c_hw_engine, base))
+
+/*
+ * @brief
+ * Cast pointer to 'struct engine *'
+ * to 'pointer to struct i2c_hw_engine_dce110 *'
+ */
+#define FROM_ENGINE(ptr) \
+	FROM_I2C_ENGINE(container_of((ptr), struct i2c_engine, base))
+
+
+static void disable_i2c_hw_engine(
+	struct i2c_hw_engine_dce110 *engine)
+{
+	const uint32_t addr = engine->addr.DC_I2C_DDCX_SETUP;
+	uint32_t value = 0;
+
+	struct dal_context *ctx = NULL;
+
+	ctx = engine->base.base.base.ctx;
+
+	value = dal_read_reg(ctx, addr);
+
+	set_reg_field_value(
+		value,
+		0,
+		DC_I2C_DDC1_SETUP,
+		DC_I2C_DDC1_ENABLE);
+
+	dal_write_reg(ctx, addr, value);
+}
+
+static void release_engine(
+	struct engine *engine)
+{
+	struct i2c_hw_engine_dce110 *hw_engine = FROM_ENGINE(engine);
+
+	struct i2c_engine *base = NULL;
+	bool safe_to_reset;
+	uint32_t value = 0;
+
+	base = &hw_engine->base.base;
+
+	/* Restore original HW engine speed */
+
+	base->funcs->set_speed(base, hw_engine->base.original_speed);
+
+	/* Release I2C */
+	{
+		value = dal_read_reg(engine->ctx, mmDC_I2C_ARBITRATION);
+
+		set_reg_field_value(
+				value,
+				1,
+				DC_I2C_ARBITRATION,
+				DC_I2C_SW_DONE_USING_I2C_REG);
+
+		dal_write_reg(engine->ctx, mmDC_I2C_ARBITRATION, value);
+	}
+
+	/* Reset HW engine */
+	{
+		uint32_t i2c_sw_status = 0;
+
+		value = dal_read_reg(engine->ctx, mmDC_I2C_SW_STATUS);
+
+		i2c_sw_status = get_reg_field_value(
+				value,
+				DC_I2C_SW_STATUS,
+				DC_I2C_SW_STATUS);
+		/* if used by SW, safe to reset */
+		safe_to_reset = (i2c_sw_status == 1);
+	}
+	{
+		value = dal_read_reg(engine->ctx, mmDC_I2C_CONTROL);
+
+		if (safe_to_reset)
+			set_reg_field_value(
+				value,
+				1,
+				DC_I2C_CONTROL,
+				DC_I2C_SOFT_RESET);
+
+		set_reg_field_value(
+			value,
+			1,
+			DC_I2C_CONTROL,
+			DC_I2C_SW_STATUS_RESET);
+
+		dal_write_reg(engine->ctx, mmDC_I2C_CONTROL, value);
+	}
+
+	/* HW I2c engine - clock gating feature */
+	if (!hw_engine->engine_keep_power_up_count)
+		disable_i2c_hw_engine(hw_engine);
+}
+
+static void keep_power_up_count(
+	struct engine *engine,
+	bool keep_power_up)
+{
+	struct i2c_hw_engine_dce110 *hw_engine = FROM_ENGINE(engine);
+
+	if (keep_power_up)
+		++hw_engine->engine_keep_power_up_count;
+	else {
+		--hw_engine->engine_keep_power_up_count;
+
+		if (!hw_engine->engine_keep_power_up_count)
+			disable_i2c_hw_engine(hw_engine);
+	}
+}
+
+static bool setup_engine(
+	struct i2c_engine *i2c_engine)
+{
+	uint32_t value = 0;
+	struct i2c_hw_engine_dce110 *engine = FROM_I2C_ENGINE(i2c_engine);
+
+	/* Program pin select */
+	{
+		const uint32_t addr = mmDC_I2C_CONTROL;
+
+		value = dal_read_reg(i2c_engine->base.ctx, addr);
+
+		set_reg_field_value(
+			value,
+			0,
+			DC_I2C_CONTROL,
+			DC_I2C_GO);
+
+		set_reg_field_value(
+			value,
+			0,
+			DC_I2C_CONTROL,
+			DC_I2C_SOFT_RESET);
+
+		set_reg_field_value(
+			value,
+			0,
+			DC_I2C_CONTROL,
+			DC_I2C_SEND_RESET);
+
+		set_reg_field_value(
+			value,
+			0,
+			DC_I2C_CONTROL,
+			DC_I2C_SW_STATUS_RESET);
+
+		set_reg_field_value(
+			value,
+			0,
+			DC_I2C_CONTROL,
+			DC_I2C_TRANSACTION_COUNT);
+
+		set_reg_field_value(
+			value,
+			engine->engine_id,
+			DC_I2C_CONTROL,
+			DC_I2C_DDC_SELECT);
+
+
+		dal_write_reg(i2c_engine->base.ctx, addr, value);
+	}
+
+	/* Program time limit */
+	{
+		const uint32_t addr = engine->addr.DC_I2C_DDCX_SETUP;
+
+		value = dal_read_reg(i2c_engine->base.ctx, addr);
+
+		set_reg_field_value(
+			value,
+			I2C_SETUP_TIME_LIMIT,
+			DC_I2C_DDC1_SETUP,
+			DC_I2C_DDC1_TIME_LIMIT);
+
+		set_reg_field_value(
+			value,
+			1,
+			DC_I2C_DDC1_SETUP,
+			DC_I2C_DDC1_ENABLE);
+
+		dal_write_reg(i2c_engine->base.ctx, addr, value);
+	}
+
+	/* Program HW priority
+	 * set to High - interrupt software I2C at any time
+	 * Enable restart of SW I2C that was interrupted by HW
+	 * disable queuing of software while I2C is in use by HW */
+	{
+		value = dal_read_reg(i2c_engine->base.ctx,
+				mmDC_I2C_ARBITRATION);
+
+		set_reg_field_value(
+			value,
+			0,
+			DC_I2C_ARBITRATION,
+			DC_I2C_NO_QUEUED_SW_GO);
+
+		set_reg_field_value(
+			value,
+			DC_I2C_ARBITRATION__DC_I2C_SW_PRIORITY_NORMAL,
+			DC_I2C_ARBITRATION,
+			DC_I2C_SW_PRIORITY);
+
+		dal_write_reg(i2c_engine->base.ctx,
+				mmDC_I2C_ARBITRATION, value);
+	}
+
+	return true;
+}
+
+static uint32_t get_speed(
+	const struct i2c_engine *i2c_engine)
+{
+	const struct i2c_hw_engine_dce110 *engine = FROM_I2C_ENGINE(i2c_engine);
+
+	const uint32_t addr = engine->addr.DC_I2C_DDCX_SPEED;
+
+	uint32_t pre_scale = 0;
+
+	uint32_t value = dal_read_reg(i2c_engine->base.ctx, addr);
+
+	pre_scale = get_reg_field_value(
+			value,
+			DC_I2C_DDC1_SPEED,
+			DC_I2C_DDC1_PRESCALE);
+
+	/* [anaumov] it seems following is unnecessary */
+	/*ASSERT(value.bits.DC_I2C_DDC1_PRESCALE);*/
+
+	return pre_scale ?
+		engine->reference_frequency / pre_scale :
+		engine->base.default_speed;
+}
+
+static void set_speed(
+	struct i2c_engine *i2c_engine,
+	uint32_t speed)
+{
+	struct i2c_hw_engine_dce110 *engine = FROM_I2C_ENGINE(i2c_engine);
+
+	if (speed) {
+		const uint32_t addr = engine->addr.DC_I2C_DDCX_SPEED;
+
+		uint32_t value = dal_read_reg(i2c_engine->base.ctx, addr);
+
+		set_reg_field_value(
+			value,
+			engine->reference_frequency / speed,
+			DC_I2C_DDC1_SPEED,
+			DC_I2C_DDC1_PRESCALE);
+
+		set_reg_field_value(
+			value,
+			2,
+			DC_I2C_DDC1_SPEED,
+			DC_I2C_DDC1_THRESHOLD);
+
+		/*DCE11, HW add 100Khz support for I2c*/
+		if (speed > 50) {
+			set_reg_field_value(
+				value,
+				2,
+				DC_I2C_DDC1_SPEED,
+				DC_I2C_DDC1_START_STOP_TIMING_CNTL);
+		} else {
+			set_reg_field_value(
+				value,
+				1,
+				DC_I2C_DDC1_SPEED,
+				DC_I2C_DDC1_START_STOP_TIMING_CNTL);
+		}
+
+		dal_write_reg(i2c_engine->base.ctx, addr, value);
+	}
+}
+
+static inline void reset_hw_engine(struct engine *engine)
+{
+	uint32_t value = dal_read_reg(engine->ctx, mmDC_I2C_CONTROL);
+
+	set_reg_field_value(
+		value,
+		1,
+		DC_I2C_CONTROL,
+		DC_I2C_SOFT_RESET);
+
+	set_reg_field_value(
+		value,
+		1,
+		DC_I2C_CONTROL,
+		DC_I2C_SW_STATUS_RESET);
+
+	dal_write_reg(engine->ctx, mmDC_I2C_CONTROL, value);
+}
+
+static bool is_hw_busy(struct engine *engine)
+{
+	uint32_t i2c_sw_status = 0;
+
+	uint32_t value = dal_read_reg(engine->ctx, mmDC_I2C_SW_STATUS);
+
+	i2c_sw_status = get_reg_field_value(
+			value,
+			DC_I2C_SW_STATUS,
+			DC_I2C_SW_STATUS);
+
+	if (i2c_sw_status == DC_I2C_STATUS__DC_I2C_STATUS_IDLE)
+		return false;
+
+	reset_hw_engine(engine);
+
+	value = dal_read_reg(engine->ctx, mmDC_I2C_SW_STATUS);
+
+	i2c_sw_status = get_reg_field_value(
+			value,
+			DC_I2C_SW_STATUS,
+			DC_I2C_SW_STATUS);
+
+	return i2c_sw_status != DC_I2C_STATUS__DC_I2C_STATUS_IDLE;
+}
+
+/*
+ * @brief
+ * DC_GPIO_DDC MM register offsets
+ */
+static const uint32_t transaction_addr[] = {
+	mmDC_I2C_TRANSACTION0,
+	mmDC_I2C_TRANSACTION1,
+	mmDC_I2C_TRANSACTION2,
+	mmDC_I2C_TRANSACTION3
+};
+
+static bool process_transaction(
+	struct i2c_hw_engine_dce110 *engine,
+	struct i2c_request_transaction_data *request)
+{
+	uint8_t length = request->length;
+	uint8_t *buffer = request->data;
+
+	bool last_transaction = false;
+	uint32_t value = 0;
+
+	struct dal_context *ctx = NULL;
+
+	ctx = engine->base.base.base.ctx;
+
+	{
+		const uint32_t addr =
+			transaction_addr[engine->transaction_count];
+
+		value = dal_read_reg(ctx, addr);
+
+		set_reg_field_value(
+			value,
+			1,
+			DC_I2C_TRANSACTION0,
+			DC_I2C_STOP_ON_NACK0);
+
+		set_reg_field_value(
+			value,
+			1,
+			DC_I2C_TRANSACTION0,
+			DC_I2C_START0);
+
+
+		if ((engine->transaction_count == 3) ||
+		(request->action == I2CAUX_TRANSACTION_ACTION_I2C_WRITE) ||
+		(request->action & I2CAUX_TRANSACTION_ACTION_I2C_READ)) {
+
+			set_reg_field_value(
+				value,
+				1,
+				DC_I2C_TRANSACTION0,
+				DC_I2C_STOP0);
+
+			last_transaction = true;
+		} else
+			set_reg_field_value(
+				value,
+				0,
+				DC_I2C_TRANSACTION0,
+				DC_I2C_STOP0);
+
+		set_reg_field_value(
+			value,
+			(0 != (request->action &
+					I2CAUX_TRANSACTION_ACTION_I2C_READ)),
+			DC_I2C_TRANSACTION0,
+			DC_I2C_RW0);
+
+		set_reg_field_value(
+			value,
+			length,
+			DC_I2C_TRANSACTION0,
+			DC_I2C_COUNT0);
+
+		dal_write_reg(ctx, addr, value);
+	}
+
+	/* Write the I2C address and I2C data
+	 * into the hardware circular buffer, one byte per entry.
+	 * As an example, the 7-bit I2C slave address for CRT monitor
+	 * for reading DDC/EDID information is 0b1010001.
+	 * For an I2C send operation, the LSB must be programmed to 0;
+	 * for I2C receive operation, the LSB must be programmed to 1. */
+
+	{
+		value = 0;
+
+		set_reg_field_value(
+			value,
+			false,
+			DC_I2C_DATA,
+			DC_I2C_DATA_RW);
+
+		set_reg_field_value(
+			value,
+			request->address,
+			DC_I2C_DATA,
+			DC_I2C_DATA);
+
+		if (engine->transaction_count == 0) {
+			set_reg_field_value(
+				value,
+				0,
+				DC_I2C_DATA,
+				DC_I2C_INDEX);
+
+			/*enable index write*/
+			set_reg_field_value(
+				value,
+				1,
+				DC_I2C_DATA,
+				DC_I2C_INDEX_WRITE);
+
+			engine->buffer_used_write = 0;
+		}
+
+		dal_write_reg(ctx, mmDC_I2C_DATA, value);
+
+		engine->buffer_used_write++;
+
+		if (!(request->action & I2CAUX_TRANSACTION_ACTION_I2C_READ)) {
+
+			set_reg_field_value(
+				value,
+				0,
+				DC_I2C_DATA,
+				DC_I2C_INDEX_WRITE);
+
+			while (length) {
+
+				set_reg_field_value(
+					value,
+					*buffer++,
+					DC_I2C_DATA,
+					DC_I2C_DATA);
+
+				dal_write_reg(ctx, mmDC_I2C_DATA, value);
+
+				engine->buffer_used_write++;
+				--length;
+			}
+		}
+	}
+
+	++engine->transaction_count;
+	engine->buffer_used_bytes += length + 1;
+
+	return last_transaction;
+}
+
+static void execute_transaction(
+	struct i2c_hw_engine_dce110 *engine)
+{
+	uint32_t value = 0;
+	struct dal_context *ctx = NULL;
+
+	ctx = engine->base.base.base.ctx;
+
+	{
+		const uint32_t addr = engine->addr.DC_I2C_DDCX_SETUP;
+
+		value = dal_read_reg(ctx, addr);
+
+		set_reg_field_value(
+			value,
+			0,
+			DC_I2C_DDC1_SETUP,
+			DC_I2C_DDC1_DATA_DRIVE_EN);
+
+		set_reg_field_value(
+			value,
+			0,
+			DC_I2C_DDC1_SETUP,
+			DC_I2C_DDC1_CLK_DRIVE_EN);
+
+		set_reg_field_value(
+			value,
+			0,
+			DC_I2C_DDC1_SETUP,
+			DC_I2C_DDC1_DATA_DRIVE_SEL);
+
+		set_reg_field_value(
+			value,
+			0,
+			DC_I2C_DDC1_SETUP,
+			DC_I2C_DDC1_INTRA_TRANSACTION_DELAY);
+
+		set_reg_field_value(
+			value,
+			0,
+			DC_I2C_DDC1_SETUP,
+			DC_I2C_DDC1_INTRA_BYTE_DELAY);
+
+		dal_write_reg(ctx, addr, value);
+	}
+
+	{
+		const uint32_t addr = mmDC_I2C_CONTROL;
+
+		value = dal_read_reg(ctx, addr);
+
+		set_reg_field_value(
+			value,
+			0,
+			DC_I2C_CONTROL,
+			DC_I2C_SOFT_RESET);
+
+		set_reg_field_value(
+			value,
+			0,
+			DC_I2C_CONTROL,
+			DC_I2C_SW_STATUS_RESET);
+
+		set_reg_field_value(
+			value,
+			0,
+			DC_I2C_CONTROL,
+			DC_I2C_SEND_RESET);
+
+		set_reg_field_value(
+			value,
+			0,
+			DC_I2C_CONTROL,
+			DC_I2C_GO);
+
+		set_reg_field_value(
+			value,
+			engine->transaction_count - 1,
+			DC_I2C_CONTROL,
+			DC_I2C_TRANSACTION_COUNT);
+
+		dal_write_reg(ctx, addr, value);
+	}
+
+	/* start I2C transfer */
+	{
+		const uint32_t addr = mmDC_I2C_CONTROL;
+
+		value	= dal_read_reg(ctx, addr);
+
+		set_reg_field_value(
+			value,
+			1,
+			DC_I2C_CONTROL,
+			DC_I2C_GO);
+
+		dal_write_reg(ctx, addr, value);
+	}
+
+	/* all transactions were executed and HW buffer became empty
+	 * (even though it actually happens when status becomes DONE) */
+	engine->transaction_count = 0;
+	engine->buffer_used_bytes = 0;
+}
+
+static void submit_channel_request(
+	struct i2c_engine *engine,
+	struct i2c_request_transaction_data *request)
+{
+	request->status = I2C_CHANNEL_OPERATION_SUCCEEDED;
+
+	if (!process_transaction(FROM_I2C_ENGINE(engine), request))
+		return;
+
+	if (is_hw_busy(&engine->base)) {
+		request->status = I2C_CHANNEL_OPERATION_ENGINE_BUSY;
+		return;
+	}
+
+	execute_transaction(FROM_I2C_ENGINE(engine));
+}
+
+static void process_channel_reply(
+	struct i2c_engine *engine,
+	struct i2c_reply_transaction_data *reply)
+{
+	uint8_t length = reply->length;
+	uint8_t *buffer = reply->data;
+
+	struct i2c_hw_engine_dce110 *i2c_hw_engine_dce110 =
+		FROM_I2C_ENGINE(engine);
+	uint32_t value = dal_read_reg(engine->base.ctx, mmDC_I2C_DATA);
+
+	/*set index*/
+	set_reg_field_value(
+		value,
+		i2c_hw_engine_dce110->buffer_used_write,
+		DC_I2C_DATA,
+		DC_I2C_INDEX);
+
+	set_reg_field_value(
+		value,
+		1,
+		DC_I2C_DATA,
+		DC_I2C_DATA_RW);
+
+	set_reg_field_value(
+		value,
+		1,
+		DC_I2C_DATA,
+		DC_I2C_INDEX_WRITE);
+
+	dal_write_reg(engine->base.ctx, mmDC_I2C_DATA, value);
+
+	while (length) {
+		/* after reading the status,
+		 * if the I2C operation executed successfully
+		 * (i.e. DC_I2C_STATUS_DONE = 1) then the I2C controller
+		 * should read data bytes from I2C circular data buffer */
+
+		value = dal_read_reg(engine->base.ctx, mmDC_I2C_DATA);
+
+		*buffer++ = get_reg_field_value(
+				value,
+				DC_I2C_DATA,
+				DC_I2C_DATA);
+
+		--length;
+	}
+}
+
+static enum i2c_channel_operation_result get_channel_status(
+	struct i2c_engine *engine,
+	uint8_t *returned_bytes)
+{
+	uint32_t i2c_sw_status = 0;
+	uint32_t value = dal_read_reg(engine->base.ctx, mmDC_I2C_SW_STATUS);
+
+	i2c_sw_status = get_reg_field_value(
+			value,
+			DC_I2C_SW_STATUS,
+			DC_I2C_SW_STATUS);
+
+	if (i2c_sw_status == DC_I2C_STATUS__DC_I2C_STATUS_USED_BY_SW)
+		return I2C_CHANNEL_OPERATION_ENGINE_BUSY;
+	else if (value & DC_I2C_SW_STATUS__DC_I2C_SW_STOPPED_ON_NACK_MASK)
+		return I2C_CHANNEL_OPERATION_NO_RESPONSE;
+	else if (value & DC_I2C_SW_STATUS__DC_I2C_SW_TIMEOUT_MASK)
+		return I2C_CHANNEL_OPERATION_TIMEOUT;
+	else if (value & DC_I2C_SW_STATUS__DC_I2C_SW_ABORTED_MASK)
+		return I2C_CHANNEL_OPERATION_FAILED;
+	else if (value & DC_I2C_SW_STATUS__DC_I2C_SW_DONE_MASK)
+		return I2C_CHANNEL_OPERATION_SUCCEEDED;
+
+	/* in DAL2, I2C_RESULT_OK was returned */
+	return I2C_CHANNEL_OPERATION_NOT_STARTED;
+}
+
+static uint8_t get_hw_buffer_available_size(
+	const struct i2c_hw_engine *engine)
+{
+	return I2C_HW_BUFFER_SIZE -
+		FROM_I2C_HW_ENGINE(engine)->buffer_used_bytes;
+}
+
+static uint32_t get_transaction_timeout(
+	const struct i2c_hw_engine *engine,
+	uint32_t length)
+{
+	uint32_t speed = engine->base.funcs->get_speed(&engine->base);
+
+	uint32_t period_timeout;
+	uint32_t num_of_clock_stretches;
+
+	if (!speed)
+		return 0;
+
+	period_timeout = (1000 * TRANSACTION_TIMEOUT_IN_I2C_CLOCKS) / speed;
+
+	num_of_clock_stretches = 1 + (length << 3) + 1;
+	num_of_clock_stretches +=
+		(FROM_I2C_HW_ENGINE(engine)->buffer_used_bytes << 3) +
+		(FROM_I2C_HW_ENGINE(engine)->transaction_count << 1);
+
+	return period_timeout * num_of_clock_stretches;
+}
+
+static void destroy(
+	struct i2c_engine **i2c_engine)
+{
+	struct i2c_hw_engine_dce110 *engine_dce110 =
+			FROM_I2C_ENGINE(*i2c_engine);
+
+	dal_i2c_hw_engine_destruct(&engine_dce110->base);
+
+	dal_free(engine_dce110);
+
+	*i2c_engine = NULL;
+}
+/*
+ * @brief
+ * DC_I2C_DDC1_SETUP MM register offsets
+ *
+ * @note
+ * The indices of this offset array are DDC engine IDs
+ */
+static const int32_t ddc_setup_offset[] = {
+
+	mmDC_I2C_DDC1_SETUP - mmDC_I2C_DDC1_SETUP, /* DDC Engine 1 */
+	mmDC_I2C_DDC2_SETUP - mmDC_I2C_DDC1_SETUP, /* DDC Engine 2 */
+	mmDC_I2C_DDC3_SETUP - mmDC_I2C_DDC1_SETUP, /* DDC Engine 3 */
+	mmDC_I2C_DDC4_SETUP - mmDC_I2C_DDC1_SETUP, /* DDC Engine 4 */
+	mmDC_I2C_DDC5_SETUP - mmDC_I2C_DDC1_SETUP, /* DDC Engine 5 */
+	mmDC_I2C_DDC6_SETUP - mmDC_I2C_DDC1_SETUP, /* DDC Engine 6 */
+	mmDC_I2C_DDCVGA_SETUP - mmDC_I2C_DDC1_SETUP /* DDC Engine 7 */
+};
+
+/*
+ * @brief
+ * DC_I2C_DDC1_SPEED MM register offsets
+ *
+ * @note
+ * The indices of this offset array are DDC engine IDs
+ */
+static const int32_t ddc_speed_offset[] = {
+	mmDC_I2C_DDC1_SPEED - mmDC_I2C_DDC1_SPEED, /* DDC Engine 1 */
+	mmDC_I2C_DDC2_SPEED - mmDC_I2C_DDC1_SPEED, /* DDC Engine 2 */
+	mmDC_I2C_DDC3_SPEED - mmDC_I2C_DDC1_SPEED, /* DDC Engine 3 */
+	mmDC_I2C_DDC4_SPEED - mmDC_I2C_DDC1_SPEED, /* DDC Engine 4 */
+	mmDC_I2C_DDC5_SPEED - mmDC_I2C_DDC1_SPEED, /* DDC Engine 5 */
+	mmDC_I2C_DDC6_SPEED - mmDC_I2C_DDC1_SPEED, /* DDC Engine 6 */
+	mmDC_I2C_DDCVGA_SPEED - mmDC_I2C_DDC1_SPEED /* DDC Engine 7 */
+};
+
+static const struct i2c_engine_funcs i2c_engine_funcs = {
+	.destroy = destroy,
+	.get_speed = get_speed,
+	.set_speed = set_speed,
+	.setup_engine = setup_engine,
+	.submit_channel_request = submit_channel_request,
+	.process_channel_reply = process_channel_reply,
+	.get_channel_status = get_channel_status,
+	.acquire_engine = dal_i2c_hw_engine_acquire_engine,
+};
+
+static const struct engine_funcs engine_funcs = {
+	.release_engine = release_engine,
+	.keep_power_up_count = keep_power_up_count,
+	.get_engine_type = dal_i2c_hw_engine_get_engine_type,
+	.acquire = dal_i2c_engine_acquire,
+	.submit_request = dal_i2c_hw_engine_submit_request,
+};
+
+static const struct i2c_hw_engine_funcs i2c_hw_engine_funcs = {
+	.get_hw_buffer_available_size = get_hw_buffer_available_size,
+	.get_transaction_timeout = get_transaction_timeout,
+	.wait_on_operation_result = dal_i2c_hw_engine_wait_on_operation_result,
+};
+
+static bool construct(
+	struct i2c_hw_engine_dce110 *engine_dce110,
+	const struct i2c_hw_engine_dce110_create_arg *arg)
+{
+	uint32_t xtal_ref_div = 0;
+	uint32_t value = 0;
+
+	/*ddc_setup_offset of dce80 and dce110 have the same register name
+	 * but different offset. Do not need different array*/
+	if (arg->engine_id >= sizeof(ddc_setup_offset) / sizeof(int32_t))
+		return false;
+	if (arg->engine_id >= sizeof(ddc_speed_offset) / sizeof(int32_t))
+		return false;
+	if (!arg->reference_frequency)
+		return false;
+
+	if (!dal_i2c_hw_engine_construct(&engine_dce110->base, arg->ctx))
+		return false;
+
+	engine_dce110->base.base.base.funcs = &engine_funcs;
+	engine_dce110->base.base.funcs = &i2c_engine_funcs;
+	engine_dce110->base.funcs = &i2c_hw_engine_funcs;
+	engine_dce110->base.default_speed = arg->default_speed;
+
+	engine_dce110->engine_id = arg->engine_id;
+
+	engine_dce110->buffer_used_bytes = 0;
+	engine_dce110->transaction_count = 0;
+	engine_dce110->engine_keep_power_up_count = 1;
+
+	/*values which are not included by arg*/
+	engine_dce110->addr.DC_I2C_DDCX_SETUP =
+		mmDC_I2C_DDC1_SETUP + ddc_setup_offset[arg->engine_id];
+	engine_dce110->addr.DC_I2C_DDCX_SPEED =
+		mmDC_I2C_DDC1_SPEED + ddc_speed_offset[arg->engine_id];
+
+
+	value = dal_read_reg(
+		engine_dce110->base.base.base.ctx,
+		mmMICROSECOND_TIME_BASE_DIV);
+
+	xtal_ref_div = get_reg_field_value(
+			value,
+			MICROSECOND_TIME_BASE_DIV,
+			XTAL_REF_DIV);
+
+	if (xtal_ref_div == 0) {
+		dal_logger_write(
+				engine_dce110->base.base.base.ctx->logger,
+				LOG_MAJOR_WARNING,
+				LOG_MINOR_COMPONENT_I2C_AUX,
+				"Invalid base timer divider\n",
+				__func__);
+		xtal_ref_div = 2;
+	}
+
+	/*Calculating Reference Clock by divding original frequency by
+	 * XTAL_REF_DIV.
+	 * At upper level, uint32_t reference_frequency =
+	 *  dal_i2caux_get_reference_clock(as) >> 1
+	 *  which already divided by 2. So we need x2 to get original
+	 *  reference clock from ppll_info
+	 */
+	engine_dce110->reference_frequency =
+		(arg->reference_frequency * 2) / xtal_ref_div;
+
+
+	return true;
+}
+
+struct i2c_engine *dal_i2c_hw_engine_dce110_create(
+	const struct i2c_hw_engine_dce110_create_arg *arg)
+{
+	struct i2c_hw_engine_dce110 *engine_dce10;
+
+	if (!arg) {
+		ASSERT_CRITICAL(false);
+		return NULL;
+	}
+
+	engine_dce10 = dal_alloc(sizeof(struct i2c_hw_engine_dce110));
+
+	if (!engine_dce10) {
+		ASSERT_CRITICAL(false);
+		return NULL;
+	}
+
+	if (construct(engine_dce10, arg))
+		return &engine_dce10->base.base;
+
+	ASSERT_CRITICAL(false);
+
+	dal_free(engine_dce10);
+
+	return NULL;
+}
diff --git a/drivers/gpu/drm/amd/dal/i2caux/dce110/i2c_hw_engine_dce110.h b/drivers/gpu/drm/amd/dal/i2caux/dce110/i2c_hw_engine_dce110.h
new file mode 100644
index 000000000000..c9aaf976f5b3
--- /dev/null
+++ b/drivers/gpu/drm/amd/dal/i2caux/dce110/i2c_hw_engine_dce110.h
@@ -0,0 +1,58 @@
+/*
+ * Copyright 2012-15 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
+ *
+ */
+
+#ifndef __DAL_I2C_HW_ENGINE_DCE110_H__
+#define __DAL_I2C_HW_ENGINE_DCE110_H__
+
+struct i2c_hw_engine_dce110 {
+	struct i2c_hw_engine base;
+	struct {
+		uint32_t DC_I2C_DDCX_SETUP;
+		uint32_t DC_I2C_DDCX_SPEED;
+	} addr;
+	uint32_t engine_id;
+	/* expressed in kilohertz */
+	uint32_t reference_frequency;
+	/* number of bytes currently used in HW buffer */
+	uint32_t buffer_used_bytes;
+	/* number of bytes used for write transaction in HW buffer
+	 * - this will be used as the index to read from*/
+	uint32_t buffer_used_write;
+	/* number of pending transactions (before GO) */
+	uint32_t transaction_count;
+	uint32_t engine_keep_power_up_count;
+};
+
+struct i2c_hw_engine_dce110_create_arg {
+	uint32_t engine_id;
+	uint32_t reference_frequency;
+	uint32_t default_speed;
+	struct dal_context *ctx;
+};
+
+struct i2c_engine *dal_i2c_hw_engine_dce110_create(
+	const struct i2c_hw_engine_dce110_create_arg *arg);
+
+#endif
diff --git a/drivers/gpu/drm/amd/dal/i2caux/dce110/i2c_sw_engine_dce110.c b/drivers/gpu/drm/amd/dal/i2caux/dce110/i2c_sw_engine_dce110.c
new file mode 100644
index 000000000000..12e74ee96722
--- /dev/null
+++ b/drivers/gpu/drm/amd/dal/i2caux/dce110/i2c_sw_engine_dce110.c
@@ -0,0 +1,172 @@
+/*
+ * Copyright 2012-15 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 "dal_services.h"
+
+/*
+ * Pre-requisites: headers required by header of this unit
+ */
+
+#include "include/i2caux_interface.h"
+#include "../engine.h"
+#include "../i2c_engine.h"
+#include "../i2c_sw_engine.h"
+
+/*
+ * Header of this unit
+ */
+
+#include "i2c_sw_engine_dce110.h"
+/*
+ * Post-requisites: headers required by this unit
+ */
+
+/*
+ * This unit
+ */
+
+/*
+ * @brief
+ * Cast 'struct i2c_sw_engine *'
+ * to 'struct i2c_sw_engine_dce110 *'
+ */
+#define FROM_I2C_SW_ENGINE(ptr) \
+	container_of((ptr), struct i2c_sw_engine_dce110, base)
+/*
+ * @brief
+ * Cast 'struct i2c_engine *'
+ * to 'struct i2c_sw_engine_dce80 *'
+ */
+#define FROM_I2C_ENGINE(ptr) \
+	FROM_I2C_SW_ENGINE(container_of((ptr), struct i2c_sw_engine, base))
+
+/*
+ * @brief
+ * Cast 'struct engine *'
+ * to 'struct i2c_sw_engine_dce80 *'
+ */
+#define FROM_ENGINE(ptr) \
+	FROM_I2C_ENGINE(container_of((ptr), struct i2c_engine, base))
+
+static void release_engine(
+	struct engine *engine)
+{
+}
+
+static void destruct(
+	struct i2c_sw_engine_dce110 *engine)
+{
+	dal_i2c_sw_engine_destruct(&engine->base);
+}
+
+static void destroy(
+	struct i2c_engine **engine)
+{
+	struct i2c_sw_engine_dce110 *sw_engine = FROM_I2C_ENGINE(*engine);
+
+	destruct(sw_engine);
+
+	dal_free(sw_engine);
+
+	*engine = NULL;
+}
+
+static bool acquire_engine(
+	struct i2c_engine *engine,
+	struct ddc *ddc_handle)
+{
+	return dal_i2caux_i2c_sw_engine_acquire_engine(engine, ddc_handle);
+}
+
+static const struct i2c_engine_funcs i2c_engine_funcs = {
+	.acquire_engine = acquire_engine,
+	.destroy = destroy,
+	.get_speed = dal_i2c_sw_engine_get_speed,
+	.set_speed = dal_i2c_sw_engine_set_speed,
+	.setup_engine = dal_i2c_engine_setup_i2c_engine,
+	.submit_channel_request = dal_i2c_sw_engine_submit_channel_request,
+	.process_channel_reply = dal_i2c_engine_process_channel_reply,
+	.get_channel_status = dal_i2c_sw_engine_get_channel_status,
+};
+
+static const struct engine_funcs engine_funcs = {
+	.release_engine = release_engine,
+	.get_engine_type = dal_i2c_sw_engine_get_engine_type,
+	.acquire = dal_i2c_engine_acquire,
+	.submit_request = dal_i2c_sw_engine_submit_request,
+	.keep_power_up_count = dal_i2caux_keep_power_up_count,
+};
+
+static bool construct(
+	struct i2c_sw_engine_dce110 *engine_dce110,
+	const struct i2c_sw_engine_dce110_create_arg *arg_dce110)
+{
+	struct i2c_sw_engine_create_arg arg_base;
+
+	arg_base.ctx = arg_dce110->ctx;
+	arg_base.default_speed = arg_dce110->default_speed;
+
+	if (!dal_i2c_sw_engine_construct(
+			&engine_dce110->base, &arg_base)) {
+		ASSERT_CRITICAL(false);
+		return false;
+	}
+
+	/*struct engine   struct engine_funcs*/
+	engine_dce110->base.base.base.funcs = &engine_funcs;
+	/*struct i2c_engine  struct i2c_engine_funcs*/
+	engine_dce110->base.base.funcs = &i2c_engine_funcs;
+	engine_dce110->base.default_speed = arg_dce110->default_speed;
+	engine_dce110->engine_id = arg_dce110->engine_id;
+
+	return true;
+}
+
+struct i2c_engine *dal_i2c_sw_engine_dce110_create(
+	const struct i2c_sw_engine_dce110_create_arg *arg)
+{
+	struct i2c_sw_engine_dce110 *engine_dce110;
+
+	if (!arg) {
+		ASSERT_CRITICAL(false);
+		return NULL;
+	}
+
+	engine_dce110 = dal_alloc(sizeof(struct i2c_sw_engine_dce110));
+
+	if (!engine_dce110) {
+		ASSERT_CRITICAL(false);
+		return NULL;
+	}
+
+	if (construct(engine_dce110, arg))
+		return &engine_dce110->base.base;
+
+	ASSERT_CRITICAL(false);
+
+	dal_free(engine_dce110);
+
+	return NULL;
+}
diff --git a/drivers/gpu/drm/amd/dal/i2caux/dce110/i2c_sw_engine_dce110.h b/drivers/gpu/drm/amd/dal/i2caux/dce110/i2c_sw_engine_dce110.h
new file mode 100644
index 000000000000..fd5fc521871a
--- /dev/null
+++ b/drivers/gpu/drm/amd/dal/i2caux/dce110/i2c_sw_engine_dce110.h
@@ -0,0 +1,43 @@
+/*
+ * Copyright 2012-15 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
+ *
+ */
+
+#ifndef __DAL_I2C_SW_ENGINE_DCE110_H__
+#define __DAL_I2C_SW_ENGINE_DCE110_H__
+
+struct i2c_sw_engine_dce110 {
+	struct i2c_sw_engine base;
+	uint32_t engine_id;
+};
+
+struct i2c_sw_engine_dce110_create_arg {
+	uint32_t engine_id;
+	uint32_t default_speed;
+	struct dal_context *ctx;
+};
+
+struct i2c_engine *dal_i2c_sw_engine_dce110_create(
+	const struct i2c_sw_engine_dce110_create_arg *arg);
+
+#endif
diff --git a/drivers/gpu/drm/amd/dal/i2caux/dce110/i2caux_dce110.c b/drivers/gpu/drm/amd/dal/i2caux/dce110/i2caux_dce110.c
new file mode 100644
index 000000000000..7e92a51a8ca3
--- /dev/null
+++ b/drivers/gpu/drm/amd/dal/i2caux/dce110/i2caux_dce110.c
@@ -0,0 +1,260 @@
+/*
+ * Copyright 2012-15 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 "dal_services.h"
+
+/*
+ * Pre-requisites: headers required by header of this unit
+ */
+
+#include "include/i2caux_interface.h"
+#include "../i2caux.h"
+#include "../engine.h"
+#include "../i2c_engine.h"
+#include "../i2c_sw_engine.h"
+#include "../i2c_hw_engine.h"
+
+/*
+ * Header of this unit
+ */
+#include "i2caux_dce110.h"
+#include "i2c_sw_engine_dce110.h"
+#include "i2c_hw_engine_dce110.h"
+#include "aux_engine_dce110.h"
+
+/*
+ * Post-requisites: headers required by this unit
+ */
+
+/*
+ * This unit
+ */
+/*cast pointer to struct i2caux TO pointer to struct i2caux_dce110*/
+#define FROM_I2C_AUX(ptr) \
+	container_of((ptr), struct i2caux_dce110, base)
+
+static void destruct(
+	struct i2caux_dce110 *i2caux_dce110)
+{
+	dal_i2caux_destruct(&i2caux_dce110->base);
+}
+
+static void destroy(
+	struct i2caux **i2c_engine)
+{
+	struct i2caux_dce110 *i2caux_dce110 = FROM_I2C_AUX(*i2c_engine);
+
+	destruct(i2caux_dce110);
+
+	dal_free(i2caux_dce110);
+
+	*i2c_engine = NULL;
+}
+
+static struct i2c_engine *acquire_i2c_hw_engine(
+	struct i2caux *i2caux,
+	struct ddc *ddc)
+{
+	struct i2caux_dce110 *i2caux_dce110 = FROM_I2C_AUX(i2caux);
+
+	struct i2c_engine *engine = NULL;
+	/* generic hw engine is not used for EDID read
+	 * It may be needed for external i2c device, like thermal chip,
+	 * TODO will be implemented when needed.
+	 * check dce80 bool non_generic for generic hw engine;
+	 */
+
+	if (!ddc)
+		return NULL;
+
+	if (dal_ddc_is_hw_supported(ddc)) {
+		enum gpio_ddc_line line = dal_ddc_get_line(ddc);
+
+		if (line < GPIO_DDC_LINE_COUNT)
+			engine = i2caux->i2c_hw_engines[line];
+	}
+
+	if (!engine)
+		return NULL;
+
+	if (!i2caux_dce110->i2c_hw_buffer_in_use &&
+		engine->base.funcs->acquire(&engine->base, ddc)) {
+		i2caux_dce110->i2c_hw_buffer_in_use = true;
+		return engine;
+	}
+
+	return NULL;
+}
+
+static void release_engine(
+	struct i2caux *i2caux,
+	struct engine *engine)
+{
+	struct i2caux_dce110 *i2caux_dce110 = FROM_I2C_AUX(i2caux);
+
+	if (engine->funcs->get_engine_type(engine) ==
+		I2CAUX_ENGINE_TYPE_I2C_DDC_HW)
+		i2caux_dce110->i2c_hw_buffer_in_use = false;
+
+	dal_i2caux_release_engine(i2caux, engine);
+}
+
+static const enum gpio_ddc_line hw_ddc_lines[] = {
+	GPIO_DDC_LINE_DDC1,
+	GPIO_DDC_LINE_DDC2,
+	GPIO_DDC_LINE_DDC3,
+};
+
+static const enum gpio_ddc_line hw_aux_lines[] = {
+	GPIO_DDC_LINE_DDC1,
+	GPIO_DDC_LINE_DDC2,
+	GPIO_DDC_LINE_DDC3,
+};
+
+/* function table */
+static const struct i2caux_funcs i2caux_funcs = {
+	.destroy = destroy,
+	.acquire_i2c_hw_engine = acquire_i2c_hw_engine,
+	.release_engine = release_engine,
+	.acquire_i2c_sw_engine = dal_i2caux_acquire_i2c_sw_engine,
+	.acquire_aux_engine = dal_i2caux_acquire_aux_engine,
+};
+
+static bool construct(
+	struct i2caux_dce110 *i2caux_dce110,
+	struct adapter_service *as,
+	struct dal_context *dal_context)
+{
+	uint32_t i = 0;
+	uint32_t reference_frequency = 0;
+	bool use_i2c_sw_engine = false;
+	struct i2caux *base = NULL;
+	/*TODO: For CZ bring up, if dal_i2caux_get_reference_clock
+	 * does not return 48KHz, we need hard coded for 48Khz.
+	 * Some BIOS setting incorrect cause this
+	 * For production, we always get value from BIOS*/
+	reference_frequency =
+		dal_i2caux_get_reference_clock(as) >> 1;
+
+	use_i2c_sw_engine = dal_adapter_service_is_feature_supported(
+		FEATURE_RESTORE_USAGE_I2C_SW_ENGINE);
+
+	base = &i2caux_dce110->base;
+
+	if (!dal_i2caux_construct(base, as, dal_context)) {
+		ASSERT_CRITICAL(false);
+		return false;
+	}
+
+	i2caux_dce110->base.funcs = &i2caux_funcs;
+	i2caux_dce110->i2c_hw_buffer_in_use = false;
+	/* Create I2C engines (DDC lines per connector)
+	 * different I2C/AUX usage cases, DDC, Generic GPIO, AUX.
+	 */
+	do {
+		enum gpio_ddc_line line_id = hw_ddc_lines[i];
+
+		struct i2c_hw_engine_dce110_create_arg hw_arg_dce110;
+
+		if (use_i2c_sw_engine) {
+			struct i2c_sw_engine_dce110_create_arg sw_arg;
+
+			sw_arg.engine_id = i;
+			sw_arg.default_speed = base->default_i2c_sw_speed;
+			sw_arg.ctx = dal_context;
+			base->i2c_sw_engines[line_id] =
+				dal_i2c_sw_engine_dce110_create(&sw_arg);
+		}
+
+		hw_arg_dce110.engine_id = i;
+		hw_arg_dce110.reference_frequency = reference_frequency;
+		hw_arg_dce110.default_speed = base->default_i2c_hw_speed;
+		hw_arg_dce110.ctx = dal_context;
+
+		base->i2c_hw_engines[line_id] =
+			dal_i2c_hw_engine_dce110_create(&hw_arg_dce110);
+
+		++i;
+	} while (i < ARRAY_SIZE(hw_ddc_lines));
+
+	/* Create AUX engines for all lines which has assisted HW AUX
+	 * 'i' (loop counter) used as DDC/AUX engine_id */
+
+	i = 0;
+
+	do {
+		enum gpio_ddc_line line_id = hw_aux_lines[i];
+
+		struct aux_engine_dce110_init_data aux_init_data;
+
+		aux_init_data.engine_id = i;
+		aux_init_data.timeout_period = base->aux_timeout_period;
+		aux_init_data.ctx = dal_context;
+
+		base->aux_engines[line_id] =
+			dal_aux_engine_dce110_create(&aux_init_data);
+
+		++i;
+	} while (i < ARRAY_SIZE(hw_aux_lines));
+
+	/*TODO Generic I2C SW and HW*/
+
+	return true;
+}
+
+/*
+ * dal_i2caux_dce110_create
+ *
+ * @brief
+ * public interface to allocate memory for DCE11 I2CAUX
+ *
+ * @param
+ * struct adapter_service *as - [in]
+ * struct dal_context *dal_context - [in]
+ *
+ * @return
+ * pointer to the base struct of DCE11 I2CAUX
+ */
+struct i2caux *dal_i2caux_dce110_create(
+	struct adapter_service *as,
+	struct dal_context *dal_context)
+{
+	struct i2caux_dce110 *i2caux_dce110 =
+		dal_alloc(sizeof(struct i2caux_dce110));
+
+	if (!i2caux_dce110) {
+		ASSERT_CRITICAL(false);
+		return NULL;
+	}
+
+	if (construct(i2caux_dce110, as, dal_context))
+		return &i2caux_dce110->base;
+
+	ASSERT_CRITICAL(false);
+
+	dal_free(i2caux_dce110);
+
+	return NULL;
+}
diff --git a/drivers/gpu/drm/amd/dal/i2caux/dce110/i2caux_dce110.h b/drivers/gpu/drm/amd/dal/i2caux/dce110/i2caux_dce110.h
new file mode 100644
index 000000000000..3c70336f3cd5
--- /dev/null
+++ b/drivers/gpu/drm/amd/dal/i2caux/dce110/i2caux_dce110.h
@@ -0,0 +1,39 @@
+/*
+ * Copyright 2012-15 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
+ *
+ */
+
+#ifndef __DAL_I2C_AUX_DCE110_H__
+#define __DAL_I2C_AUX_DCE110_H__
+
+struct i2caux_dce110 {
+	struct i2caux base;
+	/* indicate the I2C HW circular buffer is in use */
+	bool i2c_hw_buffer_in_use;
+};
+
+struct i2caux *dal_i2caux_dce110_create(
+	struct adapter_service *as,
+	struct dal_context *dal_context);
+
+#endif /* __DAL_I2C_AUX_DCE110_H__ */
diff --git a/drivers/gpu/drm/amd/dal/i2caux/engine.c b/drivers/gpu/drm/amd/dal/i2caux/engine.c
new file mode 100644
index 000000000000..390f830e71a3
--- /dev/null
+++ b/drivers/gpu/drm/amd/dal/i2caux/engine.c
@@ -0,0 +1,67 @@
+/*
+ * Copyright 2012-15 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 "dal_services.h"
+
+/*
+ * Pre-requisites: headers required by header of this unit
+ */
+
+#include "include/i2caux_interface.h"
+
+/*
+ * Header of this unit
+ */
+
+#include "engine.h"
+
+/*
+ * Post-requisites: headers required by this unit
+ */
+
+/*
+ * This unit
+ */
+void dal_i2caux_keep_power_up_count(
+	struct engine *engine,
+	bool keep_power_up)
+{
+
+}
+
+bool dal_i2caux_construct_engine(
+	struct engine *engine,
+	struct dal_context *ctx)
+{
+	engine->ddc = NULL;
+	engine->ctx = ctx;
+	return true;
+}
+
+void dal_i2caux_destruct_engine(
+	struct engine *engine)
+{
+	/* nothing to do */
+}
diff --git a/drivers/gpu/drm/amd/dal/i2caux/engine.h b/drivers/gpu/drm/amd/dal/i2caux/engine.h
new file mode 100644
index 000000000000..7fc73f569d21
--- /dev/null
+++ b/drivers/gpu/drm/amd/dal/i2caux/engine.h
@@ -0,0 +1,129 @@
+/*
+ * Copyright 2012-15 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
+ *
+ */
+
+#ifndef __DAL_ENGINE_H__
+#define __DAL_ENGINE_H__
+
+enum i2caux_transaction_operation {
+	I2CAUX_TRANSACTION_READ,
+	I2CAUX_TRANSACTION_WRITE
+};
+
+enum i2caux_transaction_address_space {
+	I2CAUX_TRANSACTION_ADDRESS_SPACE_I2C = 1,
+	I2CAUX_TRANSACTION_ADDRESS_SPACE_DPCD
+};
+
+struct i2caux_transaction_payload {
+	enum i2caux_transaction_address_space address_space;
+	uint32_t address;
+	uint8_t length;
+	uint8_t *data;
+};
+
+enum i2caux_transaction_status {
+	I2CAUX_TRANSACTION_STATUS_UNKNOWN = (-1L),
+	I2CAUX_TRANSACTION_STATUS_SUCCEEDED,
+	I2CAUX_TRANSACTION_STATUS_FAILED_CHANNEL_BUSY,
+	I2CAUX_TRANSACTION_STATUS_FAILED_TIMEOUT,
+	I2CAUX_TRANSACTION_STATUS_FAILED_PROTOCOL_ERROR,
+	I2CAUX_TRANSACTION_STATUS_FAILED_NACK,
+	I2CAUX_TRANSACTION_STATUS_FAILED_INCOMPLETE,
+	I2CAUX_TRANSACTION_STATUS_FAILED_OPERATION,
+	I2CAUX_TRANSACTION_STATUS_FAILED_INVALID_OPERATION,
+	I2CAUX_TRANSACTION_STATUS_FAILED_BUFFER_OVERFLOW
+};
+
+struct i2caux_transaction_request {
+	enum i2caux_transaction_operation operation;
+	struct i2caux_transaction_payload payload;
+	enum i2caux_transaction_status status;
+};
+
+enum i2caux_engine_type {
+	I2CAUX_ENGINE_TYPE_UNKNOWN = (-1L),
+	I2CAUX_ENGINE_TYPE_AUX,
+	I2CAUX_ENGINE_TYPE_I2C_DDC_HW,
+	I2CAUX_ENGINE_TYPE_I2C_GENERIC_HW,
+	I2CAUX_ENGINE_TYPE_I2C_SW
+};
+
+enum i2c_default_speed {
+	I2CAUX_DEFAULT_I2C_HW_SPEED = 50,
+	I2CAUX_DEFAULT_I2C_SW_SPEED = 50
+};
+
+enum i2caux_transaction_action {
+	I2CAUX_TRANSACTION_ACTION_I2C_WRITE = 0x00,
+	I2CAUX_TRANSACTION_ACTION_I2C_READ = 0x10,
+	I2CAUX_TRANSACTION_ACTION_I2C_STATUS_REQUEST = 0x20,
+
+	I2CAUX_TRANSACTION_ACTION_I2C_WRITE_MOT = 0x40,
+	I2CAUX_TRANSACTION_ACTION_I2C_READ_MOT = 0x50,
+	I2CAUX_TRANSACTION_ACTION_I2C_STATUS_REQUEST_MOT = 0x60,
+
+	I2CAUX_TRANSACTION_ACTION_DP_WRITE = 0x80,
+	I2CAUX_TRANSACTION_ACTION_DP_READ = 0x90
+};
+
+struct engine;
+
+struct engine_funcs {
+	enum i2caux_engine_type (*get_engine_type)(
+		const struct engine *engine);
+	bool (*acquire)(
+		struct engine *engine,
+		struct ddc *ddc);
+	bool (*submit_request)(
+		struct engine *engine,
+		struct i2caux_transaction_request *request,
+		bool middle_of_transaction);
+	/* [anaumov] Actually, following method is meaningful
+	 * only in I2C HW engines */
+	void (*keep_power_up_count)(
+		struct engine *engine,
+		bool keep_power_up);
+	void (*release_engine)(
+		struct engine *engine);
+};
+
+struct engine {
+	const struct engine_funcs *funcs;
+	struct ddc *ddc;
+	struct dal_context *ctx;
+};
+
+bool dal_i2caux_construct_engine(
+	struct engine *engine,
+	struct dal_context *ctx);
+
+void dal_i2caux_destruct_engine(
+	struct engine *engine);
+
+void dal_i2caux_keep_power_up_count(
+	struct engine *engine,
+	bool keep_power_up);
+
+#endif
diff --git a/drivers/gpu/drm/amd/dal/i2caux/i2c_engine.c b/drivers/gpu/drm/amd/dal/i2caux/i2c_engine.c
new file mode 100644
index 000000000000..6d40e47dfaf7
--- /dev/null
+++ b/drivers/gpu/drm/amd/dal/i2caux/i2c_engine.c
@@ -0,0 +1,122 @@
+/*
+ * Copyright 2012-15 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 "dal_services.h"
+
+/*
+ * Pre-requisites: headers required by header of this unit
+ */
+
+#include "include/i2caux_interface.h"
+#include "engine.h"
+
+/*
+ * Header of this unit
+ */
+
+#include "i2c_engine.h"
+
+/*
+ * Post-requisites: headers required by this unit
+ */
+
+/*
+ * This unit
+ */
+
+#define FROM_ENGINE(ptr) \
+	container_of((ptr), struct i2c_engine, base)
+
+bool dal_i2c_engine_acquire(
+	struct engine *engine,
+	struct ddc *ddc_handle)
+{
+	struct i2c_engine *i2c_engine = FROM_ENGINE(engine);
+
+	uint32_t counter = 0;
+	bool result;
+
+	do {
+		result = i2c_engine->funcs->acquire_engine(
+			i2c_engine, ddc_handle);
+
+		if (result)
+			break;
+
+		/* i2c_engine is busy by VBios, lets wait and retry */
+
+		dal_delay_in_microseconds(10);
+
+		++counter;
+	} while (counter < 2);
+
+	if (result) {
+		if (!i2c_engine->funcs->setup_engine(i2c_engine)) {
+			engine->funcs->release_engine(engine);
+			result = false;
+		}
+	}
+
+	return result;
+}
+
+bool dal_i2c_engine_setup_i2c_engine(
+	struct i2c_engine *engine)
+{
+	/* Derivative classes do not have to override this */
+
+	return true;
+}
+
+void dal_i2c_engine_submit_channel_request(
+	struct i2c_engine *engine,
+	struct i2c_request_transaction_data *request)
+{
+
+}
+
+void dal_i2c_engine_process_channel_reply(
+	struct i2c_engine *engine,
+	struct i2c_reply_transaction_data *reply)
+{
+
+}
+
+bool dal_i2c_engine_construct(
+	struct i2c_engine *engine,
+	struct dal_context *ctx)
+{
+	if (!dal_i2caux_construct_engine(&engine->base, ctx))
+		return false;
+
+	engine->timeout_delay = 0;
+	return true;
+}
+
+void dal_i2c_engine_destruct(
+	struct i2c_engine *engine)
+{
+	dal_i2caux_destruct_engine(&engine->base);
+}
diff --git a/drivers/gpu/drm/amd/dal/i2caux/i2c_engine.h b/drivers/gpu/drm/amd/dal/i2caux/i2c_engine.h
new file mode 100644
index 000000000000..8744cc1d50f2
--- /dev/null
+++ b/drivers/gpu/drm/amd/dal/i2caux/i2c_engine.h
@@ -0,0 +1,113 @@
+/*
+ * Copyright 2012-15 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
+ *
+ */
+
+#ifndef __DAL_I2C_ENGINE_H__
+#define __DAL_I2C_ENGINE_H__
+
+enum i2c_channel_operation_result {
+	I2C_CHANNEL_OPERATION_SUCCEEDED,
+	I2C_CHANNEL_OPERATION_FAILED,
+	I2C_CHANNEL_OPERATION_NOT_GRANTED,
+	I2C_CHANNEL_OPERATION_IS_BUSY,
+	I2C_CHANNEL_OPERATION_NO_HANDLE_PROVIDED,
+	I2C_CHANNEL_OPERATION_CHANNEL_IN_USE,
+	I2C_CHANNEL_OPERATION_CHANNEL_CLIENT_MAX_ALLOWED,
+	I2C_CHANNEL_OPERATION_ENGINE_BUSY,
+	I2C_CHANNEL_OPERATION_TIMEOUT,
+	I2C_CHANNEL_OPERATION_NO_RESPONSE,
+	I2C_CHANNEL_OPERATION_HW_REQUEST_I2C_BUS,
+	I2C_CHANNEL_OPERATION_WRONG_PARAMETER,
+	I2C_CHANNEL_OPERATION_OUT_NB_OF_RETRIES,
+	I2C_CHANNEL_OPERATION_NOT_STARTED
+};
+
+struct i2c_request_transaction_data {
+	enum i2caux_transaction_action action;
+	enum i2c_channel_operation_result status;
+	uint8_t address;
+	uint8_t length;
+	uint8_t *data;
+};
+
+struct i2c_reply_transaction_data {
+	uint8_t length;
+	uint8_t *data;
+};
+
+struct i2c_engine;
+
+struct i2c_engine_funcs {
+	void (*destroy)(
+		struct i2c_engine **ptr);
+	uint32_t (*get_speed)(
+		const struct i2c_engine *engine);
+	void (*set_speed)(
+		struct i2c_engine *engine,
+		uint32_t speed);
+	bool (*acquire_engine)(
+		struct i2c_engine *engine,
+		struct ddc *ddc);
+	bool (*setup_engine)(
+		struct i2c_engine *engine);
+	void (*submit_channel_request)(
+		struct i2c_engine *engine,
+		struct i2c_request_transaction_data *request);
+	void (*process_channel_reply)(
+		struct i2c_engine *engine,
+		struct i2c_reply_transaction_data *reply);
+	enum i2c_channel_operation_result (*get_channel_status)(
+		struct i2c_engine *engine,
+		uint8_t *returned_bytes);
+};
+
+struct i2c_engine {
+	struct engine base;
+	const struct i2c_engine_funcs *funcs;
+	uint32_t timeout_delay;
+};
+
+bool dal_i2c_engine_construct(
+	struct i2c_engine *engine,
+	struct dal_context *ctx);
+
+void dal_i2c_engine_destruct(
+	struct i2c_engine *engine);
+
+bool dal_i2c_engine_setup_i2c_engine(
+	struct i2c_engine *engine);
+
+void dal_i2c_engine_submit_channel_request(
+	struct i2c_engine *engine,
+	struct i2c_request_transaction_data *request);
+
+void dal_i2c_engine_process_channel_reply(
+	struct i2c_engine *engine,
+	struct i2c_reply_transaction_data *reply);
+
+bool dal_i2c_engine_acquire(
+	struct engine *ptr,
+	struct ddc *ddc_handle);
+
+#endif
diff --git a/drivers/gpu/drm/amd/dal/i2caux/i2c_generic_hw_engine.c b/drivers/gpu/drm/amd/dal/i2caux/i2c_generic_hw_engine.c
new file mode 100644
index 000000000000..cb808bd1c2a1
--- /dev/null
+++ b/drivers/gpu/drm/amd/dal/i2caux/i2c_generic_hw_engine.c
@@ -0,0 +1,287 @@
+/*
+ * Copyright 2012-15 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 "dal_services.h"
+
+/*
+ * Pre-requisites: headers required by header of this unit
+ */
+
+#include "include/i2caux_interface.h"
+#include "engine.h"
+#include "i2c_engine.h"
+#include "i2c_hw_engine.h"
+
+/*
+ * Header of this unit
+ */
+
+#include "i2c_generic_hw_engine.h"
+
+/*
+ * Post-requisites: headers required by this unit
+ */
+
+/*
+ * This unit
+ */
+
+/*
+ * @brief
+ * Cast 'struct i2c_hw_engine *'
+ * to 'struct i2c_generic_hw_engine *'
+ */
+#define FROM_I2C_HW_ENGINE(ptr) \
+	container_of((ptr), struct i2c_generic_hw_engine, base)
+
+/*
+ * @brief
+ * Cast 'struct i2c_engine *'
+ * to 'struct i2c_generic_hw_engine *'
+ */
+#define FROM_I2C_ENGINE(ptr) \
+	FROM_I2C_HW_ENGINE(container_of((ptr), struct i2c_hw_engine, base))
+
+/*
+ * @brief
+ * Cast 'struct engine *'
+ * to 'struct i2c_generic_hw_engine *'
+ */
+#define FROM_ENGINE(ptr) \
+	FROM_I2C_ENGINE(container_of((ptr), struct i2c_engine, base))
+
+enum i2caux_engine_type dal_i2c_generic_hw_engine_get_engine_type(
+	const struct engine *engine)
+{
+	return I2CAUX_ENGINE_TYPE_I2C_GENERIC_HW;
+}
+
+/*
+ * @brief
+ * Single transaction handling.
+ * Since transaction may be bigger than HW buffer size,
+ * it divides transaction to sub-transactions
+ * and uses batch transaction feature of the engine.
+ */
+bool dal_i2c_generic_hw_engine_submit_request(
+	struct engine *engine,
+	struct i2caux_transaction_request *i2caux_request,
+	bool middle_of_transaction)
+{
+	struct i2c_generic_hw_engine *hw_engine = FROM_ENGINE(engine);
+
+	struct i2c_hw_engine *base = &hw_engine->base;
+
+	uint8_t max_payload_size =
+		base->funcs->get_hw_buffer_available_size(base);
+
+	bool initial_stop_bit = !middle_of_transaction;
+
+	struct i2c_generic_transaction_attributes attributes;
+
+	enum i2c_channel_operation_result operation_result =
+		I2C_CHANNEL_OPERATION_FAILED;
+
+	bool result = false;
+
+	/* setup transaction initial properties */
+
+	uint8_t address = i2caux_request->payload.address;
+	uint8_t *current_payload = i2caux_request->payload.data;
+	uint8_t remaining_payload_size = i2caux_request->payload.length;
+
+	bool first_iteration = true;
+
+	if (i2caux_request->operation == I2CAUX_TRANSACTION_READ)
+		attributes.action = I2CAUX_TRANSACTION_ACTION_I2C_READ;
+	else if (i2caux_request->operation == I2CAUX_TRANSACTION_WRITE)
+		attributes.action = I2CAUX_TRANSACTION_ACTION_I2C_WRITE;
+	else {
+		i2caux_request->status =
+			I2CAUX_TRANSACTION_STATUS_FAILED_INVALID_OPERATION;
+		return false;
+	}
+
+	/* Do batch transaction.
+	 * Divide read/write data into payloads which fit HW buffer size.
+	 * 1. Single transaction:
+	 *    start_bit = 1, stop_bit depends on session state, ack_on_read = 0;
+	 * 2. Start of batch transaction:
+	 *    start_bit = 1, stop_bit = 0, ack_on_read = 1;
+	 * 3. Middle of batch transaction:
+	 *    start_bit = 0, stop_bit = 0, ack_on_read = 1;
+	 * 4. End of batch transaction:
+	 *    start_bit = 0, stop_bit depends on session state, ack_on_read = 0.
+	 * Session stop bit is set if 'middle_of_transaction' = 0. */
+
+	while (remaining_payload_size) {
+		uint8_t current_transaction_size;
+		uint8_t current_payload_size;
+
+		bool last_iteration;
+		bool stop_bit;
+
+		/* Calculate current transaction size and payload size.
+		 * Transaction size = total number of bytes in transaction,
+		 * including slave's address;
+		 * Payload size = number of data bytes in transaction. */
+
+		if (first_iteration) {
+			/* In the first sub-transaction we send slave's address
+			 * thus we need to reserve one byte for it */
+			current_transaction_size =
+			(remaining_payload_size > max_payload_size - 1) ?
+				max_payload_size :
+				remaining_payload_size + 1;
+
+			current_payload_size = current_transaction_size - 1;
+		} else {
+			/* Second and further sub-transactions will have
+			 * entire buffer reserved for data */
+			current_transaction_size =
+				(remaining_payload_size > max_payload_size) ?
+				max_payload_size :
+				remaining_payload_size;
+
+			current_payload_size = current_transaction_size;
+		}
+
+		last_iteration =
+			(remaining_payload_size == current_payload_size);
+
+		stop_bit = last_iteration ? initial_stop_bit : false;
+
+		/* write slave device address */
+
+		if (first_iteration)
+			hw_engine->funcs->write_address(hw_engine, address);
+
+		/* write current portion of data, if requested */
+
+		if (i2caux_request->operation == I2CAUX_TRANSACTION_WRITE)
+			hw_engine->funcs->write_data(
+				hw_engine,
+				current_payload,
+				current_payload_size);
+
+		/* execute transaction */
+
+		attributes.start_bit = first_iteration;
+		attributes.stop_bit = stop_bit;
+		attributes.last_read = last_iteration;
+		attributes.transaction_size = current_transaction_size;
+
+		hw_engine->funcs->execute_transaction(hw_engine, &attributes);
+
+		/* wait until transaction is processed; if it fails - quit */
+
+		operation_result = base->funcs->wait_on_operation_result(
+			base,
+			base->funcs->get_transaction_timeout(
+				base, current_transaction_size),
+			I2C_CHANNEL_OPERATION_ENGINE_BUSY);
+
+		if (operation_result != I2C_CHANNEL_OPERATION_SUCCEEDED)
+			break;
+
+		/* read current portion of data, if requested */
+
+		/* the read offset should be 1 for first sub-transaction,
+		 * and 0 for any next one */
+
+		if (i2caux_request->operation == I2CAUX_TRANSACTION_READ)
+			hw_engine->funcs->read_data(hw_engine, current_payload,
+				current_payload_size, first_iteration ? 1 : 0);
+
+		/* update loop variables */
+
+		first_iteration = false;
+		current_payload += current_payload_size;
+		remaining_payload_size -= current_payload_size;
+	}
+
+	/* update transaction status */
+
+	switch (operation_result) {
+	case I2C_CHANNEL_OPERATION_SUCCEEDED:
+		i2caux_request->status =
+			I2CAUX_TRANSACTION_STATUS_SUCCEEDED;
+		result = true;
+	break;
+	case I2C_CHANNEL_OPERATION_NO_RESPONSE:
+		i2caux_request->status =
+			I2CAUX_TRANSACTION_STATUS_FAILED_NACK;
+	break;
+	case I2C_CHANNEL_OPERATION_TIMEOUT:
+		i2caux_request->status =
+			I2CAUX_TRANSACTION_STATUS_FAILED_TIMEOUT;
+	break;
+	case I2C_CHANNEL_OPERATION_FAILED:
+		i2caux_request->status =
+			I2CAUX_TRANSACTION_STATUS_FAILED_INCOMPLETE;
+	break;
+	default:
+		i2caux_request->status =
+			I2CAUX_TRANSACTION_STATUS_FAILED_OPERATION;
+	}
+
+	return result;
+}
+
+/*
+ * @brief
+ * Returns number of microseconds to wait until timeout to be considered
+ */
+uint32_t dal_i2c_generic_hw_engine_get_transaction_timeout(
+	const struct i2c_hw_engine *engine,
+	uint32_t length)
+{
+	const struct i2c_engine *base = &engine->base;
+
+	uint32_t speed = base->funcs->get_speed(base);
+
+	if (!speed)
+		return 0;
+
+	/* total timeout = period_timeout * (start + data bits count + stop) */
+
+	return ((1000 * TRANSACTION_TIMEOUT_IN_I2C_CLOCKS) / speed) *
+		(1 + (length << 3) + 1);
+}
+
+bool dal_i2c_generic_hw_engine_construct(
+	struct i2c_generic_hw_engine *engine,
+	struct dal_context *ctx)
+{
+	if (!dal_i2c_hw_engine_construct(&engine->base, ctx))
+		return false;
+	return true;
+}
+
+void dal_i2c_generic_hw_engine_destruct(
+	struct i2c_generic_hw_engine *engine)
+{
+	dal_i2c_hw_engine_destruct(&engine->base);
+}
diff --git a/drivers/gpu/drm/amd/dal/i2caux/i2c_generic_hw_engine.h b/drivers/gpu/drm/amd/dal/i2caux/i2c_generic_hw_engine.h
new file mode 100644
index 000000000000..129041cfb2c9
--- /dev/null
+++ b/drivers/gpu/drm/amd/dal/i2caux/i2c_generic_hw_engine.h
@@ -0,0 +1,77 @@
+/*
+ * Copyright 2012-15 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
+ *
+ */
+
+#ifndef __DAL_I2C_GENERIC_HW_ENGINE_H__
+#define __DAL_I2C_GENERIC_HW_ENGINE_H__
+
+struct i2c_generic_transaction_attributes {
+	enum i2caux_transaction_action action;
+	uint8_t transaction_size;
+	bool start_bit;
+	bool stop_bit;
+	bool last_read;
+};
+
+struct i2c_generic_hw_engine;
+
+struct i2c_generic_hw_engine_funcs {
+	void (*write_address)(
+		struct i2c_generic_hw_engine *engine,
+		uint8_t address);
+	void (*write_data)(
+		struct i2c_generic_hw_engine *engine,
+		const uint8_t *buffer,
+		uint8_t length);
+	void (*read_data)(
+		struct i2c_generic_hw_engine *engine,
+		uint8_t *buffer,
+		uint8_t length,
+		uint32_t offset);
+	void (*execute_transaction)(
+		struct i2c_generic_hw_engine *engine,
+		struct i2c_generic_transaction_attributes *attributes);
+};
+
+struct i2c_generic_hw_engine {
+	struct i2c_hw_engine base;
+	const struct i2c_generic_hw_engine_funcs *funcs;
+};
+
+bool dal_i2c_generic_hw_engine_construct(
+	struct i2c_generic_hw_engine *engine,
+	struct dal_context *ctx);
+
+void dal_i2c_generic_hw_engine_destruct(
+	struct i2c_generic_hw_engine *engine);
+enum i2caux_engine_type dal_i2c_generic_hw_engine_get_engine_type(
+	const struct engine *engine);
+bool dal_i2c_generic_hw_engine_submit_request(
+	struct engine *ptr,
+	struct i2caux_transaction_request *i2caux_request,
+	bool middle_of_transaction);
+uint32_t dal_i2c_generic_hw_engine_get_transaction_timeout(
+	const struct i2c_hw_engine *engine,
+	uint32_t length);
+#endif
diff --git a/drivers/gpu/drm/amd/dal/i2caux/i2c_hw_engine.c b/drivers/gpu/drm/amd/dal/i2caux/i2c_hw_engine.c
new file mode 100644
index 000000000000..d8c8e4a2209c
--- /dev/null
+++ b/drivers/gpu/drm/amd/dal/i2caux/i2c_hw_engine.c
@@ -0,0 +1,247 @@
+/*
+ * Copyright 2012-15 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 "dal_services.h"
+
+/*
+ * Pre-requisites: headers required by header of this unit
+ */
+
+#include "include/i2caux_interface.h"
+#include "engine.h"
+#include "i2c_engine.h"
+
+/*
+ * Header of this unit
+ */
+
+#include "i2c_hw_engine.h"
+
+/*
+ * Post-requisites: headers required by this unit
+ */
+
+/*
+ * This unit
+ */
+
+/*
+ * @brief
+ * Cast 'struct i2c_engine *'
+ * to 'struct i2c_hw_engine *'
+ */
+#define FROM_I2C_ENGINE(ptr) \
+	container_of((ptr), struct i2c_hw_engine, base)
+
+/*
+ * @brief
+ * Cast 'struct engine *'
+ * to 'struct i2c_hw_engine *'
+ */
+#define FROM_ENGINE(ptr) \
+	FROM_I2C_ENGINE(container_of((ptr), struct i2c_engine, base))
+
+enum i2caux_engine_type dal_i2c_hw_engine_get_engine_type(
+	const struct engine *engine)
+{
+	return I2CAUX_ENGINE_TYPE_I2C_DDC_HW;
+}
+
+bool dal_i2c_hw_engine_submit_request(
+	struct engine *engine,
+	struct i2caux_transaction_request *i2caux_request,
+	bool middle_of_transaction)
+{
+	struct i2c_hw_engine *hw_engine = FROM_ENGINE(engine);
+
+	struct i2c_request_transaction_data request;
+
+	uint32_t transaction_timeout;
+
+	enum i2c_channel_operation_result operation_result;
+
+	bool result = false;
+
+	/* We need following:
+	 * transaction length will not exceed
+	 * the number of free bytes in HW buffer (minus one for address)*/
+
+	if (i2caux_request->payload.length >=
+		hw_engine->funcs->get_hw_buffer_available_size(hw_engine)) {
+		i2caux_request->status =
+			I2CAUX_TRANSACTION_STATUS_FAILED_BUFFER_OVERFLOW;
+		return false;
+	}
+
+	if (i2caux_request->operation == I2CAUX_TRANSACTION_READ)
+		request.action = middle_of_transaction ?
+			I2CAUX_TRANSACTION_ACTION_I2C_READ_MOT :
+			I2CAUX_TRANSACTION_ACTION_I2C_READ;
+	else if (i2caux_request->operation == I2CAUX_TRANSACTION_WRITE)
+		request.action = middle_of_transaction ?
+			I2CAUX_TRANSACTION_ACTION_I2C_WRITE_MOT :
+			I2CAUX_TRANSACTION_ACTION_I2C_WRITE;
+	else {
+		i2caux_request->status =
+			I2CAUX_TRANSACTION_STATUS_FAILED_INVALID_OPERATION;
+		/* [anaumov] in DAL2, there was no "return false" */
+		return false;
+	}
+
+	request.address = (uint8_t)i2caux_request->payload.address;
+	request.length = i2caux_request->payload.length;
+	request.data = i2caux_request->payload.data;
+
+	/* obtain timeout value before submitting request */
+
+	transaction_timeout = hw_engine->funcs->get_transaction_timeout(
+		hw_engine, i2caux_request->payload.length + 1);
+
+	hw_engine->base.funcs->submit_channel_request(
+		&hw_engine->base, &request);
+
+	if ((request.status == I2C_CHANNEL_OPERATION_FAILED) ||
+		(request.status == I2C_CHANNEL_OPERATION_ENGINE_BUSY)) {
+		i2caux_request->status =
+			I2CAUX_TRANSACTION_STATUS_FAILED_CHANNEL_BUSY;
+		return false;
+	}
+
+	/* wait until transaction proceed */
+
+	operation_result = hw_engine->funcs->wait_on_operation_result(
+		hw_engine,
+		transaction_timeout,
+		I2C_CHANNEL_OPERATION_ENGINE_BUSY);
+
+	/* update transaction status */
+
+	switch (operation_result) {
+	case I2C_CHANNEL_OPERATION_SUCCEEDED:
+		i2caux_request->status =
+			I2CAUX_TRANSACTION_STATUS_SUCCEEDED;
+		result = true;
+	break;
+	case I2C_CHANNEL_OPERATION_NO_RESPONSE:
+		i2caux_request->status =
+			I2CAUX_TRANSACTION_STATUS_FAILED_NACK;
+	break;
+	case I2C_CHANNEL_OPERATION_TIMEOUT:
+		i2caux_request->status =
+			I2CAUX_TRANSACTION_STATUS_FAILED_TIMEOUT;
+	break;
+	case I2C_CHANNEL_OPERATION_FAILED:
+		i2caux_request->status =
+			I2CAUX_TRANSACTION_STATUS_FAILED_INCOMPLETE;
+	break;
+	default:
+		i2caux_request->status =
+			I2CAUX_TRANSACTION_STATUS_FAILED_OPERATION;
+	}
+
+	if (result && (i2caux_request->operation == I2CAUX_TRANSACTION_READ)) {
+		struct i2c_reply_transaction_data reply;
+
+		reply.data = i2caux_request->payload.data;
+		reply.length = i2caux_request->payload.length;
+
+		hw_engine->base.funcs->
+			process_channel_reply(&hw_engine->base, &reply);
+	}
+
+	return result;
+}
+
+bool dal_i2c_hw_engine_acquire_engine(
+	struct i2c_engine *engine,
+	struct ddc *ddc)
+{
+	enum gpio_result result;
+	uint32_t current_speed;
+
+	result = dal_ddc_open(ddc, GPIO_MODE_HARDWARE,
+		GPIO_DDC_CONFIG_TYPE_MODE_I2C);
+
+	if (result != GPIO_RESULT_OK)
+		return false;
+
+	engine->base.ddc = ddc;
+
+	current_speed = engine->funcs->get_speed(engine);
+
+	if (current_speed)
+		FROM_I2C_ENGINE(engine)->original_speed = current_speed;
+
+	return true;
+}
+/*
+ * @brief
+ * Queries in a loop for current engine status
+ * until retrieved status matches 'expected_result', or timeout occurs.
+ * Timeout given in microseconds
+ * and the status query frequency is also one per microsecond.
+ */
+enum i2c_channel_operation_result dal_i2c_hw_engine_wait_on_operation_result(
+	struct i2c_hw_engine *engine,
+	uint32_t timeout,
+	enum i2c_channel_operation_result expected_result)
+{
+	enum i2c_channel_operation_result result;
+	uint32_t i = 0;
+
+	if (!timeout)
+		return I2C_CHANNEL_OPERATION_SUCCEEDED;
+
+	do {
+		result = engine->base.funcs->get_channel_status(
+			&engine->base, NULL);
+
+		if (result != expected_result)
+			break;
+
+		dal_delay_in_microseconds(1);
+
+		++i;
+	} while (i < timeout);
+
+	return result;
+}
+
+bool dal_i2c_hw_engine_construct(
+	struct i2c_hw_engine *engine,
+	struct dal_context *ctx)
+{
+	if (!dal_i2c_engine_construct(&engine->base, ctx))
+		return false;
+	engine->original_speed = I2CAUX_DEFAULT_I2C_HW_SPEED;
+	engine->default_speed = I2CAUX_DEFAULT_I2C_HW_SPEED;
+	return true;
+}
+
+void dal_i2c_hw_engine_destruct(
+	struct i2c_hw_engine *engine)
+{
+	dal_i2c_engine_destruct(&engine->base);
+}
diff --git a/drivers/gpu/drm/amd/dal/i2caux/i2c_hw_engine.h b/drivers/gpu/drm/amd/dal/i2caux/i2c_hw_engine.h
new file mode 100644
index 000000000000..b9c67079ab3b
--- /dev/null
+++ b/drivers/gpu/drm/amd/dal/i2caux/i2c_hw_engine.h
@@ -0,0 +1,80 @@
+/*
+ * Copyright 2012-15 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
+ *
+ */
+
+#ifndef __DAL_I2C_HW_ENGINE_H__
+#define __DAL_I2C_HW_ENGINE_H__
+
+enum {
+	TRANSACTION_TIMEOUT_IN_I2C_CLOCKS = 32
+};
+
+struct i2c_hw_engine;
+
+struct i2c_hw_engine_funcs {
+	uint8_t (*get_hw_buffer_available_size)(
+		const struct i2c_hw_engine *engine);
+	enum i2c_channel_operation_result (*wait_on_operation_result)(
+		struct i2c_hw_engine *engine,
+		uint32_t timeout,
+		enum i2c_channel_operation_result expected_result);
+	uint32_t (*get_transaction_timeout)(
+		const struct i2c_hw_engine *engine,
+		uint32_t length);
+};
+
+struct i2c_hw_engine {
+	struct i2c_engine base;
+	const struct i2c_hw_engine_funcs *funcs;
+
+	/* Values below are in kilohertz */
+	uint32_t original_speed;
+	uint32_t default_speed;
+};
+
+bool dal_i2c_hw_engine_construct(
+	struct i2c_hw_engine *engine,
+	struct dal_context *ctx);
+
+void dal_i2c_hw_engine_destruct(
+	struct i2c_hw_engine *engine);
+
+enum i2c_channel_operation_result dal_i2c_hw_engine_wait_on_operation_result(
+	struct i2c_hw_engine *engine,
+	uint32_t timeout,
+	enum i2c_channel_operation_result expected_result);
+
+bool dal_i2c_hw_engine_acquire_engine(
+	struct i2c_engine *engine,
+	struct ddc *ddc);
+
+bool dal_i2c_hw_engine_submit_request(
+	struct engine *ptr,
+	struct i2caux_transaction_request *i2caux_request,
+	bool middle_of_transaction);
+
+enum i2caux_engine_type dal_i2c_hw_engine_get_engine_type(
+	const struct engine *engine);
+
+#endif
diff --git a/drivers/gpu/drm/amd/dal/i2caux/i2c_sw_engine.c b/drivers/gpu/drm/amd/dal/i2caux/i2c_sw_engine.c
new file mode 100644
index 000000000000..fe433825ff90
--- /dev/null
+++ b/drivers/gpu/drm/amd/dal/i2caux/i2c_sw_engine.c
@@ -0,0 +1,607 @@
+/*
+ * Copyright 2012-15 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 "dal_services.h"
+
+/*
+ * Pre-requisites: headers required by header of this unit
+ */
+
+#include "include/i2caux_interface.h"
+#include "engine.h"
+#include "i2c_engine.h"
+
+/*
+ * Header of this unit
+ */
+
+#include "i2c_sw_engine.h"
+
+/*
+ * Post-requisites: headers required by this unit
+ */
+
+/*
+ * This unit
+ */
+
+#define SCL false
+#define SDA true
+
+static inline bool read_bit_from_ddc(
+	struct ddc *ddc,
+	bool data_nor_clock)
+{
+	uint32_t value = 0;
+
+	if (data_nor_clock)
+		dal_ddc_get_data(ddc, &value);
+	else
+		dal_ddc_get_clock(ddc, &value);
+
+	return (value != 0);
+}
+
+static inline void write_bit_to_ddc(
+	struct ddc *ddc,
+	bool data_nor_clock,
+	bool bit)
+{
+	uint32_t value = bit ? 1 : 0;
+
+	if (data_nor_clock)
+		dal_ddc_set_data(ddc, value);
+	else
+		dal_ddc_set_clock(ddc, value);
+}
+
+static bool wait_for_scl_high(
+	struct ddc *ddc,
+	uint16_t clock_delay_div_4)
+{
+	uint32_t scl_retry = 0;
+	uint32_t scl_retry_max = I2C_SW_TIMEOUT_DELAY / clock_delay_div_4;
+
+	dal_delay_in_microseconds(clock_delay_div_4);
+
+	/* 3 milliseconds delay
+	 * to wake up some display from "low power" state. */
+
+	do {
+		if (read_bit_from_ddc(ddc, SCL))
+			return true;
+
+		dal_delay_in_microseconds(clock_delay_div_4);
+
+		++scl_retry;
+	} while (scl_retry <= scl_retry_max);
+
+	return false;
+}
+
+static bool start_sync(
+	struct ddc *ddc_handle,
+	uint16_t clock_delay_div_4)
+{
+	uint32_t retry = 0;
+
+	/* The I2C communications start signal is:
+	 * the SDA going low from high, while the SCL is high. */
+
+	write_bit_to_ddc(ddc_handle, SCL, true);
+
+	dal_delay_in_microseconds(clock_delay_div_4);
+
+	do {
+		write_bit_to_ddc(ddc_handle, SDA, true);
+
+		if (!read_bit_from_ddc(ddc_handle, SDA)) {
+			++retry;
+			continue;
+		}
+
+		dal_delay_in_microseconds(clock_delay_div_4);
+
+		write_bit_to_ddc(ddc_handle, SCL, true);
+
+		if (!wait_for_scl_high(ddc_handle, clock_delay_div_4))
+			break;
+
+		write_bit_to_ddc(ddc_handle, SDA, false);
+
+		dal_delay_in_microseconds(clock_delay_div_4);
+
+		write_bit_to_ddc(ddc_handle, SCL, false);
+
+		dal_delay_in_microseconds(clock_delay_div_4);
+
+		return true;
+	} while (retry <= I2C_SW_RETRIES);
+
+	return false;
+}
+
+static bool stop_sync(
+	struct ddc *ddc_handle,
+	uint16_t clock_delay_div_4)
+{
+	uint32_t retry = 0;
+
+	/* The I2C communications stop signal is:
+	 * the SDA going high from low, while the SCL is high. */
+
+	write_bit_to_ddc(ddc_handle, SCL, false);
+
+	dal_delay_in_microseconds(clock_delay_div_4);
+
+	write_bit_to_ddc(ddc_handle, SDA, false);
+
+	dal_delay_in_microseconds(clock_delay_div_4);
+
+	write_bit_to_ddc(ddc_handle, SCL, true);
+
+	if (!wait_for_scl_high(ddc_handle, clock_delay_div_4))
+		return false;
+
+	write_bit_to_ddc(ddc_handle, SDA, true);
+
+	do {
+		dal_delay_in_microseconds(clock_delay_div_4);
+
+		if (read_bit_from_ddc(ddc_handle, SDA))
+			return true;
+
+		++retry;
+	} while (retry <= 2);
+
+	return false;
+}
+
+static bool write_byte(
+	struct ddc *ddc_handle,
+	uint16_t clock_delay_div_4,
+	uint8_t byte)
+{
+	int32_t shift = 7;
+	bool ack;
+
+	/* bits are transmitted serially, starting from MSB */
+
+	do {
+		dal_delay_in_microseconds(clock_delay_div_4);
+
+		write_bit_to_ddc(ddc_handle, SDA, (byte >> shift) & 1);
+
+		dal_delay_in_microseconds(clock_delay_div_4);
+
+		write_bit_to_ddc(ddc_handle, SCL, true);
+
+		if (!wait_for_scl_high(ddc_handle, clock_delay_div_4))
+			return false;
+
+		write_bit_to_ddc(ddc_handle, SCL, false);
+
+		--shift;
+	} while (shift >= 0);
+
+	/* The display sends ACK by preventing the SDA from going high
+	 * after the SCL pulse we use to send our last data bit.
+	 * If the SDA goes high after that bit, it's a NACK */
+
+	dal_delay_in_microseconds(clock_delay_div_4);
+
+	write_bit_to_ddc(ddc_handle, SDA, true);
+
+	dal_delay_in_microseconds(clock_delay_div_4);
+
+	write_bit_to_ddc(ddc_handle, SCL, true);
+
+	if (!wait_for_scl_high(ddc_handle, clock_delay_div_4))
+		return false;
+
+	/* read ACK bit */
+
+	ack = !read_bit_from_ddc(ddc_handle, SDA);
+
+	dal_delay_in_microseconds(clock_delay_div_4 << 1);
+
+	write_bit_to_ddc(ddc_handle, SCL, false);
+
+	dal_delay_in_microseconds(clock_delay_div_4 << 1);
+
+	return ack;
+}
+
+static bool read_byte(
+	struct ddc *ddc_handle,
+	uint16_t clock_delay_div_4,
+	uint8_t *byte,
+	bool more)
+{
+	int32_t shift = 7;
+
+	uint8_t data = 0;
+
+	/* The data bits are read from MSB to LSB;
+	 * bit is read while SCL is high */
+
+	do {
+		write_bit_to_ddc(ddc_handle, SCL, true);
+
+		if (!wait_for_scl_high(ddc_handle, clock_delay_div_4))
+			return false;
+
+		if (read_bit_from_ddc(ddc_handle, SDA))
+			data |= (1 << shift);
+
+		write_bit_to_ddc(ddc_handle, SCL, false);
+
+		dal_delay_in_microseconds(clock_delay_div_4 << 1);
+
+		--shift;
+	} while (shift >= 0);
+
+	/* read only whole byte */
+
+	*byte = data;
+
+	dal_delay_in_microseconds(clock_delay_div_4);
+
+	/* send the acknowledge bit:
+	 * SDA low means ACK, SDA high means NACK */
+
+	write_bit_to_ddc(ddc_handle, SDA, !more);
+
+	dal_delay_in_microseconds(clock_delay_div_4);
+
+	write_bit_to_ddc(ddc_handle, SCL, true);
+
+	if (!wait_for_scl_high(ddc_handle, clock_delay_div_4))
+		return false;
+
+	write_bit_to_ddc(ddc_handle, SCL, false);
+
+	dal_delay_in_microseconds(clock_delay_div_4);
+
+	write_bit_to_ddc(ddc_handle, SDA, true);
+
+	dal_delay_in_microseconds(clock_delay_div_4);
+
+	return true;
+}
+
+static bool i2c_write(
+	struct ddc *ddc_handle,
+	uint16_t clock_delay_div_4,
+	uint8_t address,
+	uint8_t length,
+	const uint8_t *data)
+{
+	uint32_t i = 0;
+
+	if (!write_byte(ddc_handle, clock_delay_div_4, address))
+		return false;
+
+	while (i < length) {
+		if (!write_byte(ddc_handle, clock_delay_div_4, data[i]))
+			return false;
+		++i;
+	}
+
+	return true;
+}
+
+static bool i2c_read(
+	struct ddc *ddc_handle,
+	uint16_t clock_delay_div_4,
+	uint8_t address,
+	uint8_t length,
+	uint8_t *data)
+{
+	uint32_t i = 0;
+
+	if (!write_byte(ddc_handle, clock_delay_div_4, address))
+		return false;
+
+	while (i < length) {
+		if (!read_byte(ddc_handle, clock_delay_div_4, data + i,
+			i < length - 1))
+			return false;
+		++i;
+	}
+
+	return true;
+}
+
+/*
+ * @brief
+ * Cast 'struct i2c_engine *'
+ * to 'struct i2c_sw_engine *'
+ */
+#define FROM_I2C_ENGINE(ptr) \
+	container_of((ptr), struct i2c_sw_engine, base)
+
+/*
+ * @brief
+ * Cast 'struct engine *'
+ * to 'struct i2c_sw_engine *'
+ */
+#define FROM_ENGINE(ptr) \
+	FROM_I2C_ENGINE(container_of((ptr), struct i2c_engine, base))
+
+enum i2caux_engine_type dal_i2c_sw_engine_get_engine_type(
+	const struct engine *engine)
+{
+	return I2CAUX_ENGINE_TYPE_I2C_SW;
+}
+
+bool dal_i2c_sw_engine_submit_request(
+	struct engine *engine,
+	struct i2caux_transaction_request *i2caux_request,
+	bool middle_of_transaction)
+{
+	struct i2c_sw_engine *sw_engine = FROM_ENGINE(engine);
+
+	struct i2c_engine *base = &sw_engine->base;
+
+	struct i2c_request_transaction_data request;
+	bool operation_succeeded = false;
+
+	if (i2caux_request->operation == I2CAUX_TRANSACTION_READ)
+		request.action = middle_of_transaction ?
+			I2CAUX_TRANSACTION_ACTION_I2C_READ_MOT :
+			I2CAUX_TRANSACTION_ACTION_I2C_READ;
+	else if (i2caux_request->operation == I2CAUX_TRANSACTION_WRITE)
+		request.action = middle_of_transaction ?
+			I2CAUX_TRANSACTION_ACTION_I2C_WRITE_MOT :
+			I2CAUX_TRANSACTION_ACTION_I2C_WRITE;
+	else {
+		i2caux_request->status =
+			I2CAUX_TRANSACTION_STATUS_FAILED_INVALID_OPERATION;
+		/* in DAL2, there was no "return false" */
+		return false;
+	}
+
+	request.address = (uint8_t)i2caux_request->payload.address;
+	request.length = i2caux_request->payload.length;
+	request.data = i2caux_request->payload.data;
+
+	base->funcs->submit_channel_request(base, &request);
+
+	if ((request.status == I2C_CHANNEL_OPERATION_ENGINE_BUSY) ||
+		(request.status == I2C_CHANNEL_OPERATION_FAILED))
+		i2caux_request->status =
+			I2CAUX_TRANSACTION_STATUS_FAILED_CHANNEL_BUSY;
+	else {
+		enum i2c_channel_operation_result operation_result;
+
+		do {
+			operation_result =
+				base->funcs->get_channel_status(base, NULL);
+
+			switch (operation_result) {
+			case I2C_CHANNEL_OPERATION_SUCCEEDED:
+				i2caux_request->status =
+					I2CAUX_TRANSACTION_STATUS_SUCCEEDED;
+				operation_succeeded = true;
+			break;
+			case I2C_CHANNEL_OPERATION_NO_RESPONSE:
+				i2caux_request->status =
+					I2CAUX_TRANSACTION_STATUS_FAILED_NACK;
+			break;
+			case I2C_CHANNEL_OPERATION_TIMEOUT:
+				i2caux_request->status =
+				I2CAUX_TRANSACTION_STATUS_FAILED_TIMEOUT;
+			break;
+			case I2C_CHANNEL_OPERATION_FAILED:
+				i2caux_request->status =
+				I2CAUX_TRANSACTION_STATUS_FAILED_INCOMPLETE;
+			break;
+			default:
+				i2caux_request->status =
+				I2CAUX_TRANSACTION_STATUS_FAILED_OPERATION;
+			break;
+			}
+		} while (operation_result == I2C_CHANNEL_OPERATION_ENGINE_BUSY);
+	}
+
+	return operation_succeeded;
+}
+
+uint32_t dal_i2c_sw_engine_get_speed(
+	const struct i2c_engine *engine)
+{
+	return FROM_I2C_ENGINE(engine)->speed;
+}
+
+void dal_i2c_sw_engine_set_speed(
+	struct i2c_engine *engine,
+	uint32_t speed)
+{
+	struct i2c_sw_engine *sw_engine = FROM_I2C_ENGINE(engine);
+
+	ASSERT(speed);
+
+	sw_engine->speed = speed ? speed : I2CAUX_DEFAULT_I2C_SW_SPEED;
+
+	sw_engine->clock_delay = 1000 / sw_engine->speed;
+
+	if (sw_engine->clock_delay < 12)
+		sw_engine->clock_delay = 12;
+}
+
+bool dal_i2caux_i2c_sw_engine_acquire_engine(
+	struct i2c_engine *engine,
+	struct ddc *ddc)
+{
+	enum gpio_result result;
+
+	result = dal_ddc_open(ddc, GPIO_MODE_FAST_OUTPUT,
+		GPIO_DDC_CONFIG_TYPE_MODE_I2C);
+
+	if (result != GPIO_RESULT_OK)
+		return false;
+
+	engine->base.ddc = ddc;
+
+	return true;
+}
+
+void dal_i2c_sw_engine_submit_channel_request(
+	struct i2c_engine *engine,
+	struct i2c_request_transaction_data *req)
+{
+	struct i2c_sw_engine *sw_engine = FROM_I2C_ENGINE(engine);
+
+	struct ddc *ddc = engine->base.ddc;
+	uint16_t clock_delay_div_4 = sw_engine->clock_delay >> 2;
+
+	/* send sync (start / repeated start) */
+
+	bool result = start_sync(ddc, clock_delay_div_4);
+
+	/* process payload */
+
+	if (result) {
+		switch (req->action) {
+		case I2CAUX_TRANSACTION_ACTION_I2C_WRITE:
+		case I2CAUX_TRANSACTION_ACTION_I2C_WRITE_MOT:
+			result = i2c_write(ddc, clock_delay_div_4,
+				req->address, req->length, req->data);
+		break;
+		case I2CAUX_TRANSACTION_ACTION_I2C_READ:
+		case I2CAUX_TRANSACTION_ACTION_I2C_READ_MOT:
+			result = i2c_read(ddc, clock_delay_div_4,
+				req->address, req->length, req->data);
+		break;
+		default:
+			result = false;
+		break;
+		}
+	}
+
+	/* send stop if not 'mot' or operation failed */
+
+	if (!result ||
+		(req->action == I2CAUX_TRANSACTION_ACTION_I2C_WRITE) ||
+		(req->action == I2CAUX_TRANSACTION_ACTION_I2C_READ))
+		if (!stop_sync(ddc, clock_delay_div_4))
+			result = false;
+
+	req->status = result ?
+		I2C_CHANNEL_OPERATION_SUCCEEDED :
+		I2C_CHANNEL_OPERATION_FAILED;
+}
+
+enum i2c_channel_operation_result dal_i2c_sw_engine_get_channel_status(
+	struct i2c_engine *engine,
+	uint8_t *returned_bytes)
+{
+	return dal_ddc_check_line_aborted(engine->base.ddc) ?
+		I2C_CHANNEL_OPERATION_FAILED :
+		I2C_CHANNEL_OPERATION_SUCCEEDED;
+}
+
+void dal_i2c_sw_engine_destruct(
+	struct i2c_sw_engine *engine)
+{
+	dal_i2c_engine_destruct(&engine->base);
+}
+
+static void destroy(
+	struct i2c_engine **ptr)
+{
+	dal_i2c_sw_engine_destruct(FROM_I2C_ENGINE(*ptr));
+
+	dal_free(*ptr);
+	*ptr = NULL;
+}
+
+static const struct i2c_engine_funcs i2c_engine_funcs = {
+	.acquire_engine = dal_i2caux_i2c_sw_engine_acquire_engine,
+	.destroy = destroy,
+	.get_speed = dal_i2c_sw_engine_get_speed,
+	.set_speed = dal_i2c_sw_engine_set_speed,
+	.setup_engine = dal_i2c_engine_setup_i2c_engine,
+	.submit_channel_request = dal_i2c_sw_engine_submit_channel_request,
+	.process_channel_reply = dal_i2c_engine_process_channel_reply,
+	.get_channel_status = dal_i2c_sw_engine_get_channel_status,
+};
+
+static void release_engine(
+	struct engine *engine)
+{
+
+}
+
+static const struct engine_funcs engine_funcs = {
+	.release_engine = release_engine,
+	.get_engine_type = dal_i2c_sw_engine_get_engine_type,
+	.acquire = dal_i2c_engine_acquire,
+	.submit_request = dal_i2c_sw_engine_submit_request,
+	.keep_power_up_count = dal_i2caux_keep_power_up_count,
+};
+
+bool dal_i2c_sw_engine_construct(
+	struct i2c_sw_engine *engine,
+	const struct i2c_sw_engine_create_arg *arg)
+{
+	if (!dal_i2c_engine_construct(&engine->base, arg->ctx))
+		return false;
+
+	dal_i2c_sw_engine_set_speed(&engine->base, arg->default_speed);
+	engine->base.funcs = &i2c_engine_funcs;
+	engine->base.base.funcs = &engine_funcs;
+	return true;
+}
+
+
+
+struct i2c_engine *dal_i2c_sw_engine_create(
+	const struct i2c_sw_engine_create_arg *arg)
+{
+	struct i2c_sw_engine *engine;
+
+	if (!arg) {
+		BREAK_TO_DEBUGGER();
+		return NULL;
+	}
+
+	engine = dal_alloc(sizeof(struct i2c_sw_engine));
+
+	if (!engine) {
+		BREAK_TO_DEBUGGER();
+		return NULL;
+	}
+
+	if (dal_i2c_sw_engine_construct(engine, arg))
+		return &engine->base;
+
+	BREAK_TO_DEBUGGER();
+
+	dal_free(engine);
+
+	return NULL;
+}
diff --git a/drivers/gpu/drm/amd/dal/i2caux/i2c_sw_engine.h b/drivers/gpu/drm/amd/dal/i2caux/i2c_sw_engine.h
new file mode 100644
index 000000000000..57777ea22459
--- /dev/null
+++ b/drivers/gpu/drm/amd/dal/i2caux/i2c_sw_engine.h
@@ -0,0 +1,81 @@
+/*
+ * Copyright 2012-15 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
+ *
+ */
+
+#ifndef __DAL_I2C_SW_ENGINE_H__
+#define __DAL_I2C_SW_ENGINE_H__
+
+enum {
+	I2C_SW_RETRIES = 10,
+	I2C_SW_SCL_READ_RETRIES = 128,
+	/* following value is in microseconds */
+	I2C_SW_TIMEOUT_DELAY = 3000
+};
+
+struct i2c_sw_engine;
+
+struct i2c_sw_engine {
+	struct i2c_engine base;
+	uint32_t clock_delay;
+	/* Values below are in KHz */
+	uint32_t speed;
+	uint32_t default_speed;
+};
+
+struct i2c_sw_engine_create_arg {
+	uint32_t default_speed;
+	struct dal_context *ctx;
+};
+
+bool dal_i2c_sw_engine_construct(
+	struct i2c_sw_engine *engine,
+	const struct i2c_sw_engine_create_arg *arg);
+
+bool dal_i2caux_i2c_sw_engine_acquire_engine(
+	struct i2c_engine *engine,
+	struct ddc *ddc_handle);
+
+void dal_i2c_sw_engine_destruct(
+	struct i2c_sw_engine *engine);
+
+struct i2c_engine *dal_i2c_sw_engine_create(
+	const struct i2c_sw_engine_create_arg *arg);
+enum i2caux_engine_type dal_i2c_sw_engine_get_engine_type(
+	const struct engine *engine);
+bool dal_i2c_sw_engine_submit_request(
+	struct engine *ptr,
+	struct i2caux_transaction_request *i2caux_request,
+	bool middle_of_transaction);
+uint32_t dal_i2c_sw_engine_get_speed(
+	const struct i2c_engine *engine);
+void dal_i2c_sw_engine_set_speed(
+	struct i2c_engine *ptr,
+	uint32_t speed);
+void dal_i2c_sw_engine_submit_channel_request(
+	struct i2c_engine *ptr,
+	struct i2c_request_transaction_data *req);
+enum i2c_channel_operation_result dal_i2c_sw_engine_get_channel_status(
+	struct i2c_engine *engine,
+	uint8_t *returned_bytes);
+#endif
diff --git a/drivers/gpu/drm/amd/dal/i2caux/i2caux.c b/drivers/gpu/drm/amd/dal/i2caux/i2caux.c
new file mode 100644
index 000000000000..522b7519a853
--- /dev/null
+++ b/drivers/gpu/drm/amd/dal/i2caux/i2caux.c
@@ -0,0 +1,518 @@
+/*
+ * Copyright 2012-15 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 "dal_services.h"
+
+/*
+ * Pre-requisites: headers required by header of this unit
+ */
+
+#include "include/i2caux_interface.h"
+
+/*
+ * Header of this unit
+ */
+
+#include "i2caux.h"
+
+/*
+ * Post-requisites: headers required by this unit
+ */
+
+#include "engine.h"
+#include "i2c_engine.h"
+#include "aux_engine.h"
+
+/*
+ * This unit
+ */
+
+#if defined(CONFIG_DRM_AMD_DAL_DCE11_0)
+#include "dce110/i2caux_dce110.h"
+#endif
+
+/*
+ * @brief
+ * Plain API, available publicly
+ */
+
+struct i2caux *dal_i2caux_create(
+	struct adapter_service *as,
+	struct dal_context *dal_context)
+{
+	enum dce_version dce_version;
+
+	if (!as) {
+		BREAK_TO_DEBUGGER();
+		return NULL;
+	}
+
+	dce_version = dal_adapter_service_get_dce_version(as);
+
+	switch (dce_version) {
+#if defined(CONFIG_DRM_AMD_DAL_DCE11_0)
+	case DCE_VERSION_11_0:
+		return dal_i2caux_dce110_create(as, dal_context);
+#endif
+	default:
+		BREAK_TO_DEBUGGER();
+		return NULL;
+	}
+}
+
+bool dal_i2caux_submit_i2c_command(
+	struct i2caux *i2caux,
+	struct ddc *ddc,
+	struct i2c_command *cmd)
+{
+	struct i2c_engine *engine;
+	uint8_t index_of_payload = 0;
+	bool result;
+
+	if (!ddc) {
+		BREAK_TO_DEBUGGER();
+		return false;
+	}
+
+	if (!cmd) {
+		BREAK_TO_DEBUGGER();
+		return false;
+	}
+
+	switch (cmd->engine) {
+	case I2C_COMMAND_ENGINE_SW:
+		/* try to acquire SW engine first,
+		 * acquire HW engine if SW engine not available */
+		engine = i2caux->funcs->acquire_i2c_sw_engine(i2caux, ddc);
+
+		if (!engine)
+			engine = i2caux->funcs->acquire_i2c_hw_engine(
+				i2caux, ddc);
+	break;
+	case I2C_COMMAND_ENGINE_HW:
+	case I2C_COMMAND_ENGINE_DEFAULT:
+	default:
+		/* try to acquire HW engine first,
+		 * acquire SW engine if HW engine not available */
+		engine = i2caux->funcs->acquire_i2c_hw_engine(i2caux, ddc);
+
+		if (!engine)
+			engine = i2caux->funcs->acquire_i2c_sw_engine(
+				i2caux, ddc);
+	}
+
+	if (!engine)
+		return false;
+
+	engine->funcs->set_speed(engine, cmd->speed);
+
+	result = true;
+
+	while (index_of_payload < cmd->number_of_payloads) {
+		bool mot = (index_of_payload != cmd->number_of_payloads - 1);
+
+		struct i2c_payload *payload = cmd->payloads + index_of_payload;
+
+		struct i2caux_transaction_request request = { 0 };
+
+		request.operation = payload->write ?
+			I2CAUX_TRANSACTION_WRITE :
+			I2CAUX_TRANSACTION_READ;
+
+		request.payload.address_space =
+			I2CAUX_TRANSACTION_ADDRESS_SPACE_I2C;
+		request.payload.address = (payload->address << 1) |
+			!payload->write;
+		request.payload.length = payload->length;
+		request.payload.data = payload->data;
+
+		if (!engine->base.funcs->submit_request(
+			&engine->base, &request, mot)) {
+			result = false;
+			break;
+		}
+
+		++index_of_payload;
+	}
+
+	i2caux->funcs->release_engine(i2caux, &engine->base);
+
+	return result;
+}
+
+bool dal_i2caux_submit_aux_command(
+	struct i2caux *i2caux,
+	struct ddc *ddc,
+	struct aux_command *cmd)
+{
+	struct aux_engine *engine;
+	uint8_t index_of_payload = 0;
+	bool result;
+
+	if (!ddc) {
+		BREAK_TO_DEBUGGER();
+		return false;
+	}
+
+	if (!cmd) {
+		BREAK_TO_DEBUGGER();
+		return false;
+	}
+
+	engine = i2caux->funcs->acquire_aux_engine(i2caux, ddc);
+
+	if (!engine)
+		return false;
+
+	engine->delay = cmd->defer_delay;
+	engine->max_defer_write_retry = cmd->max_defer_write_retry;
+
+	result = true;
+
+	while (index_of_payload < cmd->number_of_payloads) {
+		bool mot = (index_of_payload != cmd->number_of_payloads - 1);
+
+		struct aux_payload *payload = cmd->payloads + index_of_payload;
+
+		struct i2caux_transaction_request request = { 0 };
+
+		request.operation = payload->write ?
+			I2CAUX_TRANSACTION_WRITE :
+			I2CAUX_TRANSACTION_READ;
+
+		if (payload->i2c_over_aux) {
+			request.payload.address_space =
+				I2CAUX_TRANSACTION_ADDRESS_SPACE_I2C;
+
+			request.payload.address = (payload->address << 1) |
+				!payload->write;
+		} else {
+			request.payload.address_space =
+				I2CAUX_TRANSACTION_ADDRESS_SPACE_DPCD;
+
+			request.payload.address = payload->address;
+		}
+
+		request.payload.length = payload->length;
+		request.payload.data = payload->data;
+
+		if (!engine->base.funcs->submit_request(
+			&engine->base, &request, mot)) {
+			result = false;
+			break;
+		}
+
+		++index_of_payload;
+	}
+
+	i2caux->funcs->release_engine(i2caux, &engine->base);
+
+	return result;
+}
+
+static bool get_hw_supported_ddc_line(
+	struct ddc *ddc,
+	enum gpio_ddc_line *line)
+{
+	enum gpio_ddc_line line_found;
+
+	if (!ddc) {
+		BREAK_TO_DEBUGGER();
+		return false;
+	}
+
+	if (!dal_ddc_is_hw_supported(ddc))
+		return false;
+
+	line_found = dal_ddc_get_line(ddc);
+
+	if (line_found >= GPIO_DDC_LINE_COUNT)
+		return false;
+
+	*line = line_found;
+
+	return true;
+}
+
+void dal_i2caux_keep_engine_power_up(
+	struct i2caux *i2caux,
+	struct ddc *ddc,
+	bool keep_power_up)
+{
+	enum gpio_ddc_line line;
+	struct i2c_engine *engine;
+
+	if (!get_hw_supported_ddc_line(ddc, &line))
+		return;
+
+	engine = i2caux->i2c_hw_engines[line];
+
+	engine->base.funcs->keep_power_up_count(&engine->base, keep_power_up);
+}
+
+bool dal_i2caux_start_gtc_sync(
+	struct i2caux *i2caux,
+	struct ddc *ddc)
+{
+	enum gpio_ddc_line line;
+
+	struct aux_engine *engine;
+
+	bool result;
+
+	if (!get_hw_supported_ddc_line(ddc, &line))
+		return false;
+
+	engine = i2caux->aux_engines[line];
+
+	if (!engine)
+		return false;
+
+	if (!engine->base.funcs->acquire(&engine->base, ddc))
+		return false;
+
+	result = engine->funcs->start_gtc_sync(engine);
+
+	i2caux->funcs->release_engine(i2caux, &engine->base);
+
+	return result;
+}
+
+bool dal_i2caux_stop_gtc_sync(
+	struct i2caux *i2caux,
+	struct ddc *ddc)
+{
+	enum gpio_ddc_line line;
+
+	struct aux_engine *engine;
+
+	if (!get_hw_supported_ddc_line(ddc, &line))
+		return false;
+
+	engine = i2caux->aux_engines[line];
+
+	if (!engine)
+		return false;
+
+	if (!engine->base.funcs->acquire(&engine->base, ddc))
+		return false;
+
+	engine->funcs->stop_gtc_sync(engine);
+
+	i2caux->funcs->release_engine(i2caux, &engine->base);
+
+	return true;
+}
+
+void dal_i2caux_configure_aux(
+	struct i2caux *i2caux,
+	struct ddc *ddc,
+	union aux_config cfg)
+{
+	struct aux_engine *engine =
+		i2caux->funcs->acquire_aux_engine(i2caux, ddc);
+
+	if (!engine)
+		return;
+
+	engine->funcs->configure(engine, cfg);
+
+	i2caux->funcs->release_engine(i2caux, &engine->base);
+}
+
+void dal_i2caux_destroy(
+	struct i2caux **i2caux)
+{
+	if (!i2caux || !*i2caux) {
+		BREAK_TO_DEBUGGER();
+		return;
+	}
+
+	(*i2caux)->funcs->destroy(i2caux);
+
+	*i2caux = NULL;
+}
+
+/*
+ * @brief
+ * An utility function used by 'struct i2caux' and its descendants
+ */
+
+uint32_t dal_i2caux_get_reference_clock(
+	struct adapter_service *as)
+{
+	struct firmware_info info = { { 0 } };
+
+	if (!dal_adapter_service_get_firmware_info(as, &info))
+		return 0;
+
+	return info.pll_info.crystal_frequency;
+}
+
+/*
+ * @brief
+ * i2caux
+ */
+
+enum {
+	/* following are expressed in KHz */
+	DEFAULT_I2C_SW_SPEED = 50,
+	DEFAULT_I2C_HW_SPEED = 50,
+
+	/* This is the timeout as defined in DP 1.2a,
+	 * 2.3.4 "Detailed uPacket TX AUX CH State Description". */
+	AUX_TIMEOUT_PERIOD = 400,
+
+	/* Ideally, the SW timeout should be just above 550usec
+	 * which is programmed in HW.
+	 * But the SW timeout of 600usec is not reliable,
+	 * because on some systems, delay_in_microseconds()
+	 * returns faster than it should.
+	 * EPR #379763: by trial-and-error on different systems,
+	 * 700usec is the minimum reliable SW timeout for polling
+	 * the AUX_SW_STATUS.AUX_SW_DONE bit.
+	 * This timeout expires *only* when there is
+	 * AUX Error or AUX Timeout conditions - not during normal operation.
+	 * During normal operation, AUX_SW_STATUS.AUX_SW_DONE bit is set
+	 * at most within ~240usec. That means,
+	 * increasing this timeout will not affect normal operation,
+	 * and we'll timeout after
+	 * SW_AUX_TIMEOUT_PERIOD_MULTIPLIER * AUX_TIMEOUT_PERIOD = 1600usec.
+	 * This timeout is especially important for
+	 * resume from S3 and CTS. */
+	SW_AUX_TIMEOUT_PERIOD_MULTIPLIER = 4
+};
+
+struct i2c_engine *dal_i2caux_acquire_i2c_sw_engine(
+	struct i2caux *i2caux,
+	struct ddc *ddc)
+{
+	enum gpio_ddc_line line;
+	struct i2c_engine *engine = NULL;
+
+	if (get_hw_supported_ddc_line(ddc, &line))
+		engine = i2caux->i2c_sw_engines[line];
+
+	if (!engine)
+		engine = i2caux->i2c_generic_sw_engine;
+
+	if (!engine)
+		return NULL;
+
+	if (!engine->base.funcs->acquire(&engine->base, ddc))
+		return NULL;
+
+	return engine;
+}
+
+struct aux_engine *dal_i2caux_acquire_aux_engine(
+	struct i2caux *i2caux,
+	struct ddc *ddc)
+{
+	enum gpio_ddc_line line;
+	struct aux_engine *engine;
+
+	if (!get_hw_supported_ddc_line(ddc, &line))
+		return NULL;
+
+	engine = i2caux->aux_engines[line];
+
+	if (!engine)
+		return NULL;
+
+	if (!engine->base.funcs->acquire(&engine->base, ddc))
+		return NULL;
+
+	return engine;
+}
+
+void dal_i2caux_release_engine(
+	struct i2caux *i2caux,
+	struct engine *engine)
+{
+	engine->funcs->release_engine(engine);
+
+	dal_ddc_close(engine->ddc);
+
+	engine->ddc = NULL;
+}
+
+bool dal_i2caux_construct(
+	struct i2caux *i2caux,
+	struct adapter_service *as,
+	struct dal_context *dal_context)
+{
+	uint32_t i = 0;
+
+	i2caux->dal_context = dal_context;
+	do {
+		i2caux->i2c_sw_engines[i] = NULL;
+		i2caux->i2c_hw_engines[i] = NULL;
+		i2caux->aux_engines[i] = NULL;
+
+		++i;
+	} while (i < GPIO_DDC_LINE_COUNT);
+
+	i2caux->i2c_generic_sw_engine = NULL;
+	i2caux->i2c_generic_hw_engine = NULL;
+
+	i2caux->aux_timeout_period =
+		SW_AUX_TIMEOUT_PERIOD_MULTIPLIER * AUX_TIMEOUT_PERIOD;
+
+	i2caux->default_i2c_sw_speed = DEFAULT_I2C_SW_SPEED;
+	i2caux->default_i2c_hw_speed = DEFAULT_I2C_HW_SPEED;
+
+	return true;
+}
+
+void dal_i2caux_destruct(
+	struct i2caux *i2caux)
+{
+	uint32_t i = 0;
+
+	if (i2caux->i2c_generic_hw_engine)
+		i2caux->i2c_generic_hw_engine->funcs->destroy(
+			&i2caux->i2c_generic_hw_engine);
+
+	if (i2caux->i2c_generic_sw_engine)
+		i2caux->i2c_generic_sw_engine->funcs->destroy(
+			&i2caux->i2c_generic_sw_engine);
+
+	do {
+		if (i2caux->aux_engines[i])
+			i2caux->aux_engines[i]->funcs->destroy(
+				&i2caux->aux_engines[i]);
+
+		if (i2caux->i2c_hw_engines[i])
+			i2caux->i2c_hw_engines[i]->funcs->destroy(
+				&i2caux->i2c_hw_engines[i]);
+
+		if (i2caux->i2c_sw_engines[i])
+			i2caux->i2c_sw_engines[i]->funcs->destroy(
+				&i2caux->i2c_sw_engines[i]);
+
+		++i;
+	} while (i < GPIO_DDC_LINE_COUNT);
+}
diff --git a/drivers/gpu/drm/amd/dal/i2caux/i2caux.h b/drivers/gpu/drm/amd/dal/i2caux/i2caux.h
new file mode 100644
index 000000000000..387d4570970a
--- /dev/null
+++ b/drivers/gpu/drm/amd/dal/i2caux/i2caux.h
@@ -0,0 +1,123 @@
+/*
+ * Copyright 2012-15 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
+ *
+ */
+
+#ifndef __DAL_I2C_AUX_H__
+#define __DAL_I2C_AUX_H__
+
+uint32_t dal_i2caux_get_reference_clock(
+	struct adapter_service *as);
+
+struct i2caux;
+
+struct engine;
+
+struct i2caux_funcs {
+	void (*destroy)(struct i2caux **ptr);
+	struct i2c_engine * (*acquire_i2c_sw_engine)(
+		struct i2caux *i2caux,
+		struct ddc *ddc);
+	struct i2c_engine * (*acquire_i2c_hw_engine)(
+		struct i2caux *i2caux,
+		struct ddc *ddc);
+	struct aux_engine * (*acquire_aux_engine)(
+		struct i2caux *i2caux,
+		struct ddc *ddc);
+	void (*release_engine)(
+		struct i2caux *i2caux,
+		struct engine *engine);
+};
+
+struct i2c_engine;
+struct aux_engine;
+
+struct i2caux {
+	struct dal_context *dal_context;
+	const struct i2caux_funcs *funcs;
+	/* On ASIC we have certain amount of lines with HW DDC engine
+	 * (4, 6, or maybe more in the future).
+	 * For every such line, we create separate HW DDC engine
+	 * (since we have these engines in HW) and separate SW DDC engine
+	 * (to allow concurrent use of few lines).
+	 * In similar way we have AUX engines. */
+
+	/* I2C SW engines, per DDC line.
+	 * Only lines with HW DDC support will be initialized */
+	struct i2c_engine *i2c_sw_engines[GPIO_DDC_LINE_COUNT];
+
+	/* I2C HW engines, per DDC line.
+	 * Only lines with HW DDC support will be initialized */
+	struct i2c_engine *i2c_hw_engines[GPIO_DDC_LINE_COUNT];
+
+	/* AUX engines, per DDC line.
+	 * Only lines with HW AUX support will be initialized */
+	struct aux_engine *aux_engines[GPIO_DDC_LINE_COUNT];
+
+	/* For all other lines, we can use
+	 * single instance of generic I2C HW engine
+	 * (since in HW, there is single instance of it)
+	 * or single instance of generic I2C SW engine.
+	 * AUX is not supported for other lines. */
+
+	/* General-purpose I2C SW engine.
+	 * Can be assigned dynamically to any line per transaction */
+	struct i2c_engine *i2c_generic_sw_engine;
+
+	/* General-purpose I2C generic HW engine.
+	 * Can be assigned dynamically to almost any line per transaction */
+	struct i2c_engine *i2c_generic_hw_engine;
+
+	/* [anaumov] in DAL2, there is a Mutex */
+
+	uint32_t aux_timeout_period;
+
+	/* expressed in KHz */
+	uint32_t default_i2c_sw_speed;
+	uint32_t default_i2c_hw_speed;
+};
+
+bool dal_i2caux_construct(
+	struct i2caux *i2caux,
+	struct adapter_service *as,
+	struct dal_context *dal_context);
+
+void dal_i2caux_release_engine(
+	struct i2caux *i2caux,
+	struct engine *engine);
+
+void dal_i2caux_destruct(
+	struct i2caux *i2caux);
+
+void dal_i2caux_destroy(
+	struct i2caux **ptr);
+
+struct i2c_engine *dal_i2caux_acquire_i2c_sw_engine(
+	struct i2caux *i2caux,
+	struct ddc *ddc);
+
+struct aux_engine *dal_i2caux_acquire_aux_engine(
+	struct i2caux *i2caux,
+	struct ddc *ddc);
+
+#endif