[PATCH 06/10] drm/amd/display: dc/i2caux: add support for DCE6

[Mauro Rossi <issor.oruam-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>]

DCE6 targets are added replicating existing DCE8 implementation.
---
 .../gpu/drm/amd/display/dc/i2caux/Makefile    |  12 +
 .../dc/i2caux/dce60/i2c_hw_engine_dce60.c     | 875 ++++++++++++++++++
 .../dc/i2caux/dce60/i2c_hw_engine_dce60.h     |  54 ++
 .../dc/i2caux/dce60/i2c_sw_engine_dce60.c     | 173 ++++
 .../dc/i2caux/dce60/i2c_sw_engine_dce60.h     |  43 +
 .../display/dc/i2caux/dce60/i2caux_dce60.c    | 284 ++++++
 .../display/dc/i2caux/dce60/i2caux_dce60.h    |  38 +
 .../gpu/drm/amd/display/dc/i2caux/i2caux.c    |  10 +
 8 files changed, 1489 insertions(+)
 create mode 100644 drivers/gpu/drm/amd/display/dc/i2caux/dce60/i2c_hw_engine_dce60.c
 create mode 100644 drivers/gpu/drm/amd/display/dc/i2caux/dce60/i2c_hw_engine_dce60.h
 create mode 100644 drivers/gpu/drm/amd/display/dc/i2caux/dce60/i2c_sw_engine_dce60.c
 create mode 100644 drivers/gpu/drm/amd/display/dc/i2caux/dce60/i2c_sw_engine_dce60.h
 create mode 100644 drivers/gpu/drm/amd/display/dc/i2caux/dce60/i2caux_dce60.c
 create mode 100644 drivers/gpu/drm/amd/display/dc/i2caux/dce60/i2caux_dce60.h

diff --git a/drivers/gpu/drm/amd/display/dc/i2caux/Makefile b/drivers/gpu/drm/amd/display/dc/i2caux/Makefile
index 352885cb4d07..80f58a357879 100644
--- a/drivers/gpu/drm/amd/display/dc/i2caux/Makefile
+++ b/drivers/gpu/drm/amd/display/dc/i2caux/Makefile
@@ -30,6 +30,18 @@ AMD_DAL_I2CAUX = $(addprefix $(AMDDALPATH)/dc/i2caux/,$(I2CAUX))
 
 AMD_DISPLAY_FILES += $(AMD_DAL_I2CAUX)
 
+###############################################################################
+# DCE 6x family
+###############################################################################
+ifdef CONFIG_DRM_AMD_DC_SI
+I2CAUX_DCE60 = i2caux_dce60.o i2c_hw_engine_dce60.o \
+	i2c_sw_engine_dce60.o
+
+AMD_DAL_I2CAUX_DCE60 = $(addprefix $(AMDDALPATH)/dc/i2caux/dce60/,$(I2CAUX_DCE60))
+
+AMD_DISPLAY_FILES += $(AMD_DAL_I2CAUX_DCE60)
+endif
+
 ###############################################################################
 # DCE 8x family
 ###############################################################################
diff --git a/drivers/gpu/drm/amd/display/dc/i2caux/dce60/i2c_hw_engine_dce60.c b/drivers/gpu/drm/amd/display/dc/i2caux/dce60/i2c_hw_engine_dce60.c
new file mode 100644
index 000000000000..a945e00ce913
--- /dev/null
+++ b/drivers/gpu/drm/amd/display/dc/i2caux/dce60/i2c_hw_engine_dce60.c
@@ -0,0 +1,875 @@
+/*
+ * 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 "dm_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"
+#include "../i2c_generic_hw_engine.h"
+/*
+ * Header of this unit
+ */
+
+#include "i2c_hw_engine_dce60.h"
+
+/*
+ * Post-requisites: headers required by this unit
+ */
+
+#include "dce/dce_6_0_d.h"
+#include "dce/dce_6_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 'struct i2c_hw_engine *'
+ * to 'struct i2c_hw_engine_dce60 *'
+ */
+#define FROM_I2C_HW_ENGINE(ptr) \
+	container_of((ptr), struct i2c_hw_engine_dce60, base)
+
+/*
+ * @brief
+ * Cast pointer to 'struct i2c_engine *'
+ * to pointer to 'struct i2c_hw_engine_dce60 *'
+ */
+#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_dce60 *'
+ */
+#define FROM_ENGINE(ptr) \
+	FROM_I2C_ENGINE(container_of((ptr), struct i2c_engine, base))
+
+static void disable_i2c_hw_engine(
+	struct i2c_hw_engine_dce60 *engine)
+{
+	const uint32_t addr = engine->addr.DC_I2C_DDCX_SETUP;
+	uint32_t value = 0;
+
+	struct dc_context *ctx = NULL;
+
+	ctx = engine->base.base.base.ctx;
+
+	value = dm_read_reg(ctx, addr);
+
+	set_reg_field_value(
+		value,
+		0,
+		DC_I2C_DDC1_SETUP,
+		DC_I2C_DDC1_ENABLE);
+
+	dm_write_reg(ctx, addr, value);
+}
+
+static void release_engine(
+	struct engine *engine)
+{
+	struct i2c_hw_engine_dce60 *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 = dm_read_reg(engine->ctx, mmDC_I2C_ARBITRATION);
+
+		set_reg_field_value(
+				value,
+				1,
+				DC_I2C_ARBITRATION,
+				DC_I2C_SW_DONE_USING_I2C_REG);
+
+		dm_write_reg(engine->ctx, mmDC_I2C_ARBITRATION, value);
+	}
+
+	/* Reset HW engine */
+	{
+		uint32_t i2c_sw_status = 0;
+
+		value = dm_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 = dm_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);
+
+		dm_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 destruct(
+	struct i2c_hw_engine_dce60 *engine)
+{
+	dal_i2c_hw_engine_destruct(&engine->base);
+}
+
+static void destroy(
+	struct i2c_engine **i2c_engine)
+{
+	struct i2c_hw_engine_dce60 *engine = FROM_I2C_ENGINE(*i2c_engine);
+
+	destruct(engine);
+
+	kfree(engine);
+
+	*i2c_engine = NULL;
+}
+
+static bool setup_engine(
+	struct i2c_engine *i2c_engine)
+{
+	uint32_t value = 0;
+	struct i2c_hw_engine_dce60 *engine = FROM_I2C_ENGINE(i2c_engine);
+
+	/* Program pin select */
+	{
+		const uint32_t addr = mmDC_I2C_CONTROL;
+
+		value = dm_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);
+
+		dm_write_reg(i2c_engine->base.ctx, addr, value);
+	}
+
+	/* Program time limit */
+	{
+		const uint32_t addr = engine->addr.DC_I2C_DDCX_SETUP;
+
+		value = dm_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);
+
+		dm_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 = dm_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);
+
+		dm_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_dce60 *engine = FROM_I2C_ENGINE(i2c_engine);
+
+	const uint32_t addr = engine->addr.DC_I2C_DDCX_SPEED;
+
+	uint32_t pre_scale = 0;
+
+	uint32_t value = dm_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_dce60 *engine = FROM_I2C_ENGINE(i2c_engine);
+
+	if (speed) {
+		const uint32_t addr = engine->addr.DC_I2C_DDCX_SPEED;
+
+		uint32_t value = dm_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);
+
+		dm_write_reg(i2c_engine->base.ctx, addr, value);
+	}
+}
+
+static inline void reset_hw_engine(struct engine *engine)
+{
+	uint32_t value = dm_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);
+
+	dm_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 = dm_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 = dm_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_dce60 *engine,
+	struct i2c_request_transaction_data *request)
+{
+	uint32_t length = request->length;
+	uint8_t *buffer = request->data;
+
+	bool last_transaction = false;
+	uint32_t value = 0;
+
+	struct dc_context *ctx = NULL;
+
+	ctx = engine->base.base.base.ctx;
+
+	{
+		const uint32_t addr =
+			transaction_addr[engine->transaction_count];
+
+		value = dm_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);
+
+		dm_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);
+		}
+
+		dm_write_reg(ctx, mmDC_I2C_DATA, value);
+
+		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);
+
+				dm_write_reg(ctx, mmDC_I2C_DATA, value);
+				--length;
+			}
+		}
+	}
+
+	++engine->transaction_count;
+	engine->buffer_used_bytes += length + 1;
+
+	return last_transaction;
+}
+
+static void execute_transaction(
+	struct i2c_hw_engine_dce60 *engine)
+{
+	uint32_t value = 0;
+	struct dc_context *ctx = NULL;
+
+	ctx = engine->base.base.base.ctx;
+
+	{
+		const uint32_t addr = engine->addr.DC_I2C_DDCX_SETUP;
+
+		value = dm_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);
+
+		dm_write_reg(ctx, addr, value);
+	}
+
+	{
+		const uint32_t addr = mmDC_I2C_CONTROL;
+
+		value = dm_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);
+
+		dm_write_reg(ctx, addr, value);
+	}
+
+	/* start I2C transfer */
+	{
+		const uint32_t addr = mmDC_I2C_CONTROL;
+
+		value	= dm_read_reg(ctx, addr);
+
+		set_reg_field_value(
+			value,
+			1,
+			DC_I2C_CONTROL,
+			DC_I2C_GO);
+
+		dm_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)
+{
+	uint32_t length = reply->length;
+	uint8_t *buffer = reply->data;
+
+	uint32_t value = 0;
+
+	/*set index*/
+	set_reg_field_value(
+		value,
+		length - 1,
+		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);
+
+	dm_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 = dm_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 = dm_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;
+
+	/*
+	 * this is the case when HW used for communication, I2C_SW_STATUS
+	 * could be zero
+	 */
+	return I2C_CHANNEL_OPERATION_SUCCEEDED;
+}
+
+static uint32_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;
+}
+
+/*
+ * @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,
+	.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 void construct(
+	struct i2c_hw_engine_dce60 *engine,
+	const struct i2c_hw_engine_dce60_create_arg *arg)
+{
+	dal_i2c_hw_engine_construct(&engine->base, arg->ctx);
+
+	engine->base.base.base.funcs = &engine_funcs;
+	engine->base.base.funcs = &i2c_engine_funcs;
+	engine->base.funcs = &i2c_hw_engine_funcs;
+	engine->base.default_speed = arg->default_speed;
+	engine->addr.DC_I2C_DDCX_SETUP =
+		mmDC_I2C_DDC1_SETUP + ddc_setup_offset[arg->engine_id];
+	engine->addr.DC_I2C_DDCX_SPEED =
+		mmDC_I2C_DDC1_SPEED + ddc_speed_offset[arg->engine_id];
+
+	engine->engine_id = arg->engine_id;
+	engine->reference_frequency = arg->reference_frequency;
+	engine->buffer_used_bytes = 0;
+	engine->transaction_count = 0;
+	engine->engine_keep_power_up_count = 1;
+}
+
+struct i2c_engine *dal_i2c_hw_engine_dce60_create(
+	const struct i2c_hw_engine_dce60_create_arg *arg)
+{
+	struct i2c_hw_engine_dce60 *engine;
+
+	if (!arg) {
+		BREAK_TO_DEBUGGER();
+		return NULL;
+	}
+
+	if ((arg->engine_id >= sizeof(ddc_setup_offset) / sizeof(int32_t)) ||
+	    (arg->engine_id >= sizeof(ddc_speed_offset) / sizeof(int32_t)) ||
+	    !arg->reference_frequency) {
+		BREAK_TO_DEBUGGER();
+		return NULL;
+	}
+
+	engine = kzalloc(sizeof(struct i2c_hw_engine_dce60), GFP_KERNEL);
+
+	if (!engine) {
+		BREAK_TO_DEBUGGER();
+		return NULL;
+	}
+
+	construct(engine, arg);
+	return &engine->base.base;
+}
diff --git a/drivers/gpu/drm/amd/display/dc/i2caux/dce60/i2c_hw_engine_dce60.h b/drivers/gpu/drm/amd/display/dc/i2caux/dce60/i2c_hw_engine_dce60.h
new file mode 100644
index 000000000000..48954265133d
--- /dev/null
+++ b/drivers/gpu/drm/amd/display/dc/i2caux/dce60/i2c_hw_engine_dce60.h
@@ -0,0 +1,54 @@
+/*
+ * 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_DCE60_H__
+#define __DAL_I2C_HW_ENGINE_DCE60_H__
+
+struct i2c_hw_engine_dce60 {
+	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 pending transactions (before GO) */
+	uint32_t transaction_count;
+	uint32_t engine_keep_power_up_count;
+};
+
+struct i2c_hw_engine_dce60_create_arg {
+	uint32_t engine_id;
+	uint32_t reference_frequency;
+	uint32_t default_speed;
+	struct dc_context *ctx;
+};
+
+struct i2c_engine *dal_i2c_hw_engine_dce60_create(
+	const struct i2c_hw_engine_dce60_create_arg *arg);
+#endif
diff --git a/drivers/gpu/drm/amd/display/dc/i2caux/dce60/i2c_sw_engine_dce60.c b/drivers/gpu/drm/amd/display/dc/i2caux/dce60/i2c_sw_engine_dce60.c
new file mode 100644
index 000000000000..9830dc6698e0
--- /dev/null
+++ b/drivers/gpu/drm/amd/display/dc/i2caux/dce60/i2c_sw_engine_dce60.c
@@ -0,0 +1,173 @@
+/*
+ * 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 "dm_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_dce60.h"
+
+/*
+ * Post-requisites: headers required by this unit
+ */
+
+#include "dce/dce_6_0_d.h"
+#include "dce/dce_6_0_sh_mask.h"
+
+/*
+ * This unit
+ */
+
+static const uint32_t ddc_hw_status_addr[] = {
+	mmDC_I2C_DDC1_HW_STATUS,
+	mmDC_I2C_DDC2_HW_STATUS,
+	mmDC_I2C_DDC3_HW_STATUS,
+	mmDC_I2C_DDC4_HW_STATUS,
+	mmDC_I2C_DDC5_HW_STATUS,
+	mmDC_I2C_DDC6_HW_STATUS,
+	mmDC_I2C_DDCVGA_HW_STATUS
+};
+
+/*
+ * @brief
+ * Cast 'struct i2c_sw_engine *'
+ * to 'struct i2c_sw_engine_dce60 *'
+ */
+#define FROM_I2C_SW_ENGINE(ptr) \
+	container_of((ptr), struct i2c_sw_engine_dce60, base)
+
+/*
+ * @brief
+ * Cast 'struct i2c_engine *'
+ * to 'struct i2c_sw_engine_dce60 *'
+ */
+#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_dce60 *'
+ */
+#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_dce60 *engine)
+{
+	dal_i2c_sw_engine_destruct(&engine->base);
+}
+
+static void destroy(
+	struct i2c_engine **engine)
+{
+	struct i2c_sw_engine_dce60 *sw_engine = FROM_I2C_ENGINE(*engine);
+
+	destruct(sw_engine);
+
+	kfree(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,
+};
+
+static void construct(
+	struct i2c_sw_engine_dce60 *engine,
+	const struct i2c_sw_engine_dce60_create_arg *arg)
+{
+	struct i2c_sw_engine_create_arg arg_base;
+
+	arg_base.ctx = arg->ctx;
+	arg_base.default_speed = arg->default_speed;
+
+	dal_i2c_sw_engine_construct(&engine->base, &arg_base);
+
+	engine->base.base.base.funcs = &engine_funcs;
+	engine->base.base.funcs = &i2c_engine_funcs;
+	engine->base.default_speed = arg->default_speed;
+	engine->engine_id = arg->engine_id;
+}
+
+struct i2c_engine *dal_i2c_sw_engine_dce60_create(
+	const struct i2c_sw_engine_dce60_create_arg *arg)
+{
+	struct i2c_sw_engine_dce60 *engine;
+
+	if (!arg) {
+		BREAK_TO_DEBUGGER();
+		return NULL;
+	}
+
+	engine = kzalloc(sizeof(struct i2c_sw_engine_dce60), GFP_KERNEL);
+
+	if (!engine) {
+		BREAK_TO_DEBUGGER();
+		return NULL;
+	}
+
+	construct(engine, arg);
+	return &engine->base.base;
+}
+
diff --git a/drivers/gpu/drm/amd/display/dc/i2caux/dce60/i2c_sw_engine_dce60.h b/drivers/gpu/drm/amd/display/dc/i2caux/dce60/i2c_sw_engine_dce60.h
new file mode 100644
index 000000000000..5a65a5139e76
--- /dev/null
+++ b/drivers/gpu/drm/amd/display/dc/i2caux/dce60/i2c_sw_engine_dce60.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_DCE60_H__
+#define __DAL_I2C_SW_ENGINE_DCE60_H__
+
+struct i2c_sw_engine_dce60 {
+	struct i2c_sw_engine base;
+	uint32_t engine_id;
+};
+
+struct i2c_sw_engine_dce60_create_arg {
+	uint32_t engine_id;
+	uint32_t default_speed;
+	struct dc_context *ctx;
+};
+
+struct i2c_engine *dal_i2c_sw_engine_dce60_create(
+	const struct i2c_sw_engine_dce60_create_arg *arg);
+
+#endif
diff --git a/drivers/gpu/drm/amd/display/dc/i2caux/dce60/i2caux_dce60.c b/drivers/gpu/drm/amd/display/dc/i2caux/dce60/i2caux_dce60.c
new file mode 100644
index 000000000000..5aaa7cf83807
--- /dev/null
+++ b/drivers/gpu/drm/amd/display/dc/i2caux/dce60/i2caux_dce60.c
@@ -0,0 +1,284 @@
+/*
+ * 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 "dm_services.h"
+
+/*
+ * Pre-requisites: headers required by header of this unit
+ */
+#include "include/i2caux_interface.h"
+#include "../i2caux.h"
+
+/*
+ * Header of this unit
+ */
+
+#include "i2caux_dce60.h"
+
+/*
+ * Post-requisites: headers required by this unit
+ */
+
+#include "../engine.h"
+#include "../i2c_engine.h"
+#include "../i2c_sw_engine.h"
+#include "i2c_sw_engine_dce60.h"
+#include "../i2c_hw_engine.h"
+#include "i2c_hw_engine_dce60.h"
+#include "../i2c_generic_hw_engine.h"
+#include "../aux_engine.h"
+
+
+#include "../dce110/aux_engine_dce110.h"
+#include "../dce110/i2caux_dce110.h"
+
+#include "dce/dce_6_0_d.h"
+#include "dce/dce_6_0_sh_mask.h"
+
+
+/* set register offset */
+#define SR(reg_name)\
+	.reg_name = mm ## reg_name
+
+/* set register offset with instance */
+#define SRI(reg_name, block, id)\
+	.reg_name = mm ## block ## id ## _ ## reg_name
+
+#define aux_regs(id)\
+[id] = {\
+	AUX_COMMON_REG_LIST(id), \
+	.AUX_RESET_MASK = 0 \
+}
+
+static const struct dce110_aux_registers dce60_aux_regs[] = {
+		aux_regs(0),
+		aux_regs(1),
+		aux_regs(2),
+		aux_regs(3),
+		aux_regs(4),
+		aux_regs(5)
+};
+
+/*
+ * This unit
+ */
+
+#define FROM_I2C_AUX(ptr) \
+	container_of((ptr), struct i2caux_dce60, base)
+
+static void destruct(
+	struct i2caux_dce60 *i2caux_dce60)
+{
+	dal_i2caux_destruct(&i2caux_dce60->base);
+}
+
+static void destroy(
+	struct i2caux **i2c_engine)
+{
+	struct i2caux_dce60 *i2caux_dce60 = FROM_I2C_AUX(*i2c_engine);
+
+	destruct(i2caux_dce60);
+
+	kfree(i2caux_dce60);
+
+	*i2c_engine = NULL;
+}
+
+static struct i2c_engine *acquire_i2c_hw_engine(
+	struct i2caux *i2caux,
+	struct ddc *ddc)
+{
+	struct i2caux_dce60 *i2caux_dce60 = FROM_I2C_AUX(i2caux);
+
+	struct i2c_engine *engine = NULL;
+	bool non_generic;
+
+	if (!ddc)
+		return NULL;
+
+	if (ddc->hw_info.hw_supported) {
+		enum gpio_ddc_line line = dal_ddc_get_line(ddc);
+
+		if (line < GPIO_DDC_LINE_COUNT) {
+			non_generic = true;
+			engine = i2caux->i2c_hw_engines[line];
+		}
+	}
+
+	if (!engine) {
+		non_generic = false;
+		engine = i2caux->i2c_generic_hw_engine;
+	}
+
+	if (!engine)
+		return NULL;
+
+	if (non_generic) {
+		if (!i2caux_dce60->i2c_hw_buffer_in_use &&
+			engine->base.funcs->acquire(&engine->base, ddc)) {
+			i2caux_dce60->i2c_hw_buffer_in_use = true;
+			return engine;
+		}
+	} else {
+		if (engine->base.funcs->acquire(&engine->base, ddc))
+			return engine;
+	}
+
+	return NULL;
+}
+
+static void release_engine(
+	struct i2caux *i2caux,
+	struct engine *engine)
+{
+	if (engine->funcs->get_engine_type(engine) ==
+		I2CAUX_ENGINE_TYPE_I2C_DDC_HW)
+		FROM_I2C_AUX(i2caux)->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,
+	GPIO_DDC_LINE_DDC4,
+	GPIO_DDC_LINE_DDC5,
+	GPIO_DDC_LINE_DDC6,
+	GPIO_DDC_LINE_DDC_VGA
+};
+
+static const enum gpio_ddc_line hw_aux_lines[] = {
+	GPIO_DDC_LINE_DDC1,
+	GPIO_DDC_LINE_DDC2,
+	GPIO_DDC_LINE_DDC3,
+	GPIO_DDC_LINE_DDC4,
+	GPIO_DDC_LINE_DDC5,
+	GPIO_DDC_LINE_DDC6
+};
+
+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 void construct(
+	struct i2caux_dce60 *i2caux_dce60,
+	struct dc_context *ctx)
+{
+	/* Entire family have I2C engine reference clock frequency
+	 * changed from XTALIN (27) to XTALIN/2 (13.5) */
+
+	struct i2caux *base = &i2caux_dce60->base;
+
+	uint32_t reference_frequency =
+		dal_i2caux_get_reference_clock(ctx->dc_bios) >> 1;
+
+	/*bool use_i2c_sw_engine = dal_adapter_service_is_feature_supported(as,
+		FEATURE_RESTORE_USAGE_I2C_SW_ENGINE);*/
+
+	/* Use SWI2C for dce8 currently, sicne we have bug with hwi2c */
+	bool use_i2c_sw_engine = true;
+
+	uint32_t i;
+
+	dal_i2caux_construct(base, ctx);
+
+	i2caux_dce60->base.funcs = &i2caux_funcs;
+	i2caux_dce60->i2c_hw_buffer_in_use = false;
+
+	/* Create I2C HW engines (HW + SW pairs)
+	 * for all lines which has assisted HW DDC
+	 * 'i' (loop counter) used as DDC/AUX engine_id */
+
+	i = 0;
+
+	do {
+		enum gpio_ddc_line line_id = hw_ddc_lines[i];
+
+		struct i2c_hw_engine_dce60_create_arg hw_arg;
+
+		if (use_i2c_sw_engine) {
+			struct i2c_sw_engine_dce60_create_arg sw_arg;
+
+			sw_arg.engine_id = i;
+			sw_arg.default_speed = base->default_i2c_sw_speed;
+			sw_arg.ctx = ctx;
+			base->i2c_sw_engines[line_id] =
+				dal_i2c_sw_engine_dce60_create(&sw_arg);
+		}
+
+		hw_arg.engine_id = i;
+		hw_arg.reference_frequency = reference_frequency;
+		hw_arg.default_speed = base->default_i2c_hw_speed;
+		hw_arg.ctx = ctx;
+
+		base->i2c_hw_engines[line_id] =
+			dal_i2c_hw_engine_dce60_create(&hw_arg);
+
+		++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 arg;
+
+		arg.engine_id = i;
+		arg.timeout_period = base->aux_timeout_period;
+		arg.ctx = ctx;
+		arg.regs = &dce60_aux_regs[i];
+
+		base->aux_engines[line_id] =
+			dal_aux_engine_dce110_create(&arg);
+
+		++i;
+	} while (i < ARRAY_SIZE(hw_aux_lines));
+
+	/* TODO Generic I2C SW and HW */
+}
+
+struct i2caux *dal_i2caux_dce60_create(
+	struct dc_context *ctx)
+{
+	struct i2caux_dce60 *i2caux_dce60 =
+		kzalloc(sizeof(struct i2caux_dce60), GFP_KERNEL);
+
+	if (!i2caux_dce60) {
+		BREAK_TO_DEBUGGER();
+		return NULL;
+	}
+
+	construct(i2caux_dce60, ctx);
+	return &i2caux_dce60->base;
+}
diff --git a/drivers/gpu/drm/amd/display/dc/i2caux/dce60/i2caux_dce60.h b/drivers/gpu/drm/amd/display/dc/i2caux/dce60/i2caux_dce60.h
new file mode 100644
index 000000000000..819b5ccbf977
--- /dev/null
+++ b/drivers/gpu/drm/amd/display/dc/i2caux/dce60/i2caux_dce60.h
@@ -0,0 +1,38 @@
+/*
+ * 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_DCE60_H__
+#define __DAL_I2C_AUX_DCE60_H__
+
+struct i2caux_dce60 {
+	struct i2caux base;
+	/* indicate the I2C HW circular buffer is in use */
+	bool i2c_hw_buffer_in_use;
+};
+
+struct i2caux *dal_i2caux_dce60_create(
+	struct dc_context *ctx);
+
+#endif
diff --git a/drivers/gpu/drm/amd/display/dc/i2caux/i2caux.c b/drivers/gpu/drm/amd/display/dc/i2caux/i2caux.c
index 9b0bcc6b769b..e431624cc755 100644
--- a/drivers/gpu/drm/amd/display/dc/i2caux/i2caux.c
+++ b/drivers/gpu/drm/amd/display/dc/i2caux/i2caux.c
@@ -49,6 +49,10 @@
  * This unit
  */
 
+#if defined(CONFIG_DRM_AMD_DC_SI)
+#include "dce60/i2caux_dce60.h"
+#endif
+
 #include "dce80/i2caux_dce80.h"
 
 #include "dce100/i2caux_dce100.h"
@@ -78,6 +82,12 @@ struct i2caux *dal_i2caux_create(
 	}
 
 	switch (ctx->dce_version) {
+#if defined(CONFIG_DRM_AMD_DC_SI)
+	case DCE_VERSION_6_0:
+	case DCE_VERSION_6_1:
+	case DCE_VERSION_6_4:
+		return dal_i2caux_dce60_create(ctx);
+#endif
 	case DCE_VERSION_8_0:
 	case DCE_VERSION_8_1:
 	case DCE_VERSION_8_3:
-- 
2.17.1

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