drm/radeon/kms: initial radeon displayport porting

This is enough to retrieve EDID and DPCP.
Signed-off-by: Dave Airlie <airlied@redhat.com>

drivers/gpu/drm/radeon/Makefile

@@ -49,7 +49,7 @@ radeon-y += radeon_device.o radeon_kms.o \
 	radeon_cs.o radeon_bios.o radeon_benchmark.o r100.o r300.o r420.o \
 	rs400.o rs600.o rs690.o rv515.o r520.o r600.o rv770.o radeon_test.o \
 	r200.o radeon_legacy_tv.o r600_cs.o r600_blit.o r600_blit_shaders.o \
-	r600_blit_kms.o radeon_pm.o
+	r600_blit_kms.o radeon_pm.o atombios_dp.o
 
 radeon-$(CONFIG_COMPAT) += radeon_ioc32.o
 

drivers/gpu/drm/radeon/atombios_dp.c

+/*
+ * Copyright 2007-8 Advanced Micro Devices, Inc.
+ * Copyright 2008 Red Hat 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: Dave Airlie
+ *          Alex Deucher
+ */
+#include "drmP.h"
+#include "radeon_drm.h"
+#include "radeon.h"
+
+#include "atom.h"
+#include "atom-bits.h"
+#include "drm_dp_helper.h"
+
+#define DP_LINK_STATUS_SIZE	6
+
+bool radeon_process_aux_ch(struct radeon_i2c_chan *chan, u8 *req_bytes,
+			   int num_bytes, u8 *read_byte, 
+			   u8 read_buf_len, u8 delay)
+{
+	struct drm_device *dev = chan->dev;
+	struct radeon_device *rdev = dev->dev_private;
+	PROCESS_AUX_CHANNEL_TRANSACTION_PS_ALLOCATION args;
+	int index = GetIndexIntoMasterTable(COMMAND, ProcessAuxChannelTransaction);
+	unsigned char *base;
+	
+	memset(&args, 0, sizeof(args));
+	
+	base = (unsigned char *)rdev->mode_info.atom_context->scratch;
+
+	memcpy(base, req_bytes, num_bytes);
+
+	args.lpAuxRequest = 0;
+	args.lpDataOut = 16;
+	args.ucDataOutLen = 0;
+	args.ucChannelID = chan->i2c_id;
+	args.ucDelay = delay;
+
+	atom_execute_table(rdev->mode_info.atom_context, index, (uint32_t *)&args);
+
+	if (args.ucReplyStatus) {
+		DRM_ERROR("failed to get auxch %02x%02x %02x %02x 0x%02x %02x\n",
+			  req_bytes[1], req_bytes[0], req_bytes[2], req_bytes[3],
+			  chan->i2c_id, args.ucReplyStatus);
+		return false;
+	}
+
+	if (args.ucDataOutLen && read_byte && read_buf_len) {
+		if (read_buf_len < args.ucDataOutLen) {
+			DRM_ERROR("Buffer to small for return answer %d %d\n",
+				  read_buf_len, args.ucDataOutLen);
+			return false;
+		}
+		{
+			int len = min(read_buf_len, args.ucDataOutLen);
+			memcpy(read_byte, base + 16, len);
+		}
+	}
+	return true;
+}
+
+int radeon_dp_encoder_service(struct radeon_device *rdev, int action, int dp_clock,
+			      uint8_t ucconfig, uint8_t lane_num)
+{
+	DP_ENCODER_SERVICE_PARAMETERS args;
+	int index = GetIndexIntoMasterTable(COMMAND, DPEncoderService);
+
+	memset(&args, 0, sizeof(args));
+	args.ucLinkClock = dp_clock / 10;
+	args.ucConfig = ucconfig;
+	args.ucAction = action;
+	args.ucLaneNum = lane_num;
+	args.ucStatus = 0;
+
+	atom_execute_table(rdev->mode_info.atom_context, index, (uint32_t *)&args);
+	return args.ucStatus;
+}
+
+int radeon_dp_getsinktype(struct radeon_connector *radeon_connector)
+{
+	struct radeon_connector_atom_dig *radeon_dig_connector = radeon_connector->con_priv;
+	struct drm_device *dev = radeon_connector->base.dev;
+	struct radeon_device *rdev = dev->dev_private;
+
+	return radeon_dp_encoder_service(rdev, ATOM_DP_ACTION_GET_SINK_TYPE, 0,
+					 radeon_dig_connector->uc_i2c_id, 0);
+}
+
+union dig_transmitter_control {
+	DIG_TRANSMITTER_CONTROL_PS_ALLOCATION v1;
+	DIG_TRANSMITTER_CONTROL_PARAMETERS_V2 v2;
+};
+
+bool radeon_dp_aux_native_write(struct radeon_connector *radeon_connector, uint16_t address,
+				uint8_t send_bytes, uint8_t *send)
+{
+	struct radeon_connector_atom_dig *radeon_dig_connector = radeon_connector->con_priv;
+	struct drm_device *dev = radeon_connector->base.dev;
+	struct radeon_device *rdev = dev->dev_private;
+	u8 msg[20];
+	u8 msg_len, dp_msg_len;
+	bool ret;
+
+	dp_msg_len = 4;
+	msg[0] = address;
+	msg[1] = address >> 8;
+	msg[2] = AUX_NATIVE_WRITE << 4;
+	dp_msg_len += send_bytes;
+	msg[3] = (dp_msg_len << 4) | (send_bytes - 1);
+
+	if (send_bytes > 16)
+		return false;
+
+	memcpy(&msg[4], send, send_bytes);
+	msg_len = 4 + send_bytes;
+	ret = radeon_process_aux_ch(radeon_dig_connector->dp_i2c_bus, msg, msg_len, NULL, 0, 0);
+	return ret;
+}
+
+bool radeon_dp_aux_native_read(struct radeon_connector *radeon_connector, uint16_t address,
+			       uint8_t delay, uint8_t expected_bytes,
+			       uint8_t *read_p)
+{
+	struct radeon_connector_atom_dig *radeon_dig_connector = radeon_connector->con_priv;
+	struct drm_device *dev = radeon_connector->base.dev;
+	struct radeon_device *rdev = dev->dev_private;
+	u8 msg[20];
+	u8 msg_len, dp_msg_len;
+	bool ret = false;
+	msg_len = 4;
+	dp_msg_len = 4;
+	msg[0] = address;
+	msg[1] = address >> 8;
+	msg[2] = AUX_NATIVE_READ << 4;
+	msg[3] = (dp_msg_len) << 4;
+	msg[3] |= expected_bytes - 1;
+
+	ret = radeon_process_aux_ch(radeon_dig_connector->dp_i2c_bus, msg, msg_len, read_p, expected_bytes, delay);
+	return ret;
+}
+
+void radeon_dp_getdpcp(struct radeon_connector *radeon_connector)
+{
+	struct radeon_connector_atom_dig *radeon_dig_connector = radeon_connector->con_priv;
+	u8 msg[25];
+	int ret;
+
+	ret = radeon_dp_aux_native_read(radeon_connector, DP_DPCP_REV, 0, 8, msg);
+	if (ret) {
+		memcpy(radeon_dig_connector->dpcp, msg, 8);
+		{ 
+			int i;
+			printk("DPCP: ");
+			for (i = 0; i < 8; i++)
+				printk("%02x ", msg[i]);
+			printk("\n");
+		}
+	}
+	radeon_dig_connector->dpcp[0] = 0;
+	return;
+}
+
+static bool atom_dp_get_link_status(struct radeon_connector *radeon_connector,
+				    u8 link_status[DP_LINK_STATUS_SIZE])
+{
+	int ret;
+	ret = radeon_dp_aux_native_read(radeon_connector, DP_LANE0_1_STATUS, 100,
+					DP_LINK_STATUS_SIZE, link_status);
+	if (!ret) {
+		DRM_ERROR("displayport link status failed\n");
+		return false;
+	}
+
+	DRM_INFO("link status %02x %02x %02x %02x %02x %02x\n",
+		 link_status[0], link_status[1], link_status[2],
+		 link_status[3], link_status[4], link_status[5]);
+	return true;
+}
+
+static void dp_set_power(struct radeon_connector *radeon_connector, u8 power_state)
+{
+	struct radeon_connector_atom_dig *radeon_dig_connector = radeon_connector->con_priv;
+	if (radeon_dig_connector->dpcp[0] >= 0x11) {
+		radeon_dp_aux_native_write(radeon_connector, 0x600, 1,
+					   &power_state);
+	}
+}
+
+static void dp_update_dpvs_emph(struct radeon_connector *radeon_connector,
+				u8 train_set[4])
+{
+	struct radeon_connector_atom_dig *radeon_dig_connector = radeon_connector->con_priv;
+
+//	radeon_dp_digtransmitter_setup_vsemph();
+	radeon_dp_aux_native_write(radeon_connector, DP_TRAINING_LANE0_SET,
+				   0/* lc */, train_set);
+}
+
+static void dp_set_training(struct radeon_connector *radeon_connector,
+			    u8 training)
+{
+	radeon_dp_aux_native_write(radeon_connector, DP_TRAINING_PATTERN_SET,
+				   1, &training);
+}
+
+int radeon_dp_i2c_aux_ch(struct i2c_adapter *adapter, int mode,
+			 uint8_t write_byte, uint8_t *read_byte)
+{
+	struct i2c_algo_dp_aux_data *algo_data = adapter->algo_data;
+	struct radeon_i2c_chan *auxch = (struct radeon_i2c_chan *)adapter;
+	int ret = 0;
+	uint16_t address = algo_data->address;
+	uint8_t msg[5];
+	uint8_t reply[2];
+	int msg_len, dp_msg_len;
+	int reply_bytes;
+
+	/* Set up the command byte */
+	if (mode & MODE_I2C_READ)
+		msg[2] = AUX_I2C_READ << 4;
+	else
+		msg[2] = AUX_I2C_WRITE << 4;
+
+	if (!(mode & MODE_I2C_STOP))
+		msg[2] |= AUX_I2C_MOT << 4;
+
+	msg[0] = address;
+	msg[1] = address >> 8;
+
+	reply_bytes = 1;
+
+	msg_len = 4;
+	dp_msg_len = 3;
+	switch (mode) {
+	case MODE_I2C_WRITE:
+		msg[4] = write_byte;
+		msg_len++;
+		dp_msg_len += 2;
+		break;
+	case MODE_I2C_READ:
+		dp_msg_len += 1;
+		break;
+	default:
+		break;
+	}
+
+	msg[3] = (dp_msg_len) << 4;
+	ret = radeon_process_aux_ch(auxch, msg, msg_len, reply, reply_bytes, 0);
+
+	if (ret) {
+		if (read_byte)
+			*read_byte = reply[0];
+		return reply_bytes;
+	}
+	return -EREMOTEIO;
+}

drivers/gpu/drm/radeon/radeon_atombios.c

@@ -47,7 +47,7 @@ radeon_add_atom_connector(struct drm_device *dev,
 			  int connector_type,
 			  struct radeon_i2c_bus_rec *i2c_bus,
 			  bool linkb, uint32_t igp_lane_info,
-			  uint16_t connector_object_id);
+			  uint16_t connector_object_id, uint8_t uc_i2c_id);
 
 /* from radeon_legacy_encoder.c */
 extern void
@@ -60,8 +60,8 @@ union atom_supported_devices {
 	struct _ATOM_SUPPORTED_DEVICES_INFO_2d1 info_2d1;
 };
 
-static inline struct radeon_i2c_bus_rec radeon_lookup_gpio(struct drm_device
-							   *dev, uint8_t id)
+static inline struct radeon_i2c_bus_rec radeon_lookup_gpio(struct drm_device *dev,
+							   uint8_t id)
 {
 	struct radeon_device *rdev = dev->dev_private;
 	struct atom_context *ctx = rdev->mode_info.atom_context;
@@ -276,7 +276,7 @@ bool radeon_get_atom_connector_info_from_object_table(struct drm_device *dev)
 	uint16_t igp_lane_info, conn_id, connector_object_id;
 	bool linkb;
 	struct radeon_i2c_bus_rec ddc_bus;
-
+	ATOM_I2C_ID_CONFIG_ACCESS i2c_id;
 	atom_parse_data_header(ctx, index, &size, &frev, &crev, &data_offset);
 
 	if (data_offset == 0)
@@ -302,7 +302,7 @@ bool radeon_get_atom_connector_info_from_object_table(struct drm_device *dev)
 		path = (ATOM_DISPLAY_OBJECT_PATH *) addr;
 		path_size += le16_to_cpu(path->usSize);
 		linkb = false;
-
+		i2c_id.ucAccess = 0;
 		if (device_support & le16_to_cpu(path->usDeviceTag)) {
 			uint8_t con_obj_id, con_obj_num, con_obj_type;
 
@@ -420,7 +420,7 @@ bool radeon_get_atom_connector_info_from_object_table(struct drm_device *dev)
 								 asObjects[j].
 								 usRecordOffset));
 						ATOM_I2C_RECORD *i2c_record;
-
+						
 						while (record->ucRecordType > 0
 						       && record->
 						       ucRecordType <=
@@ -431,6 +431,7 @@ bool radeon_get_atom_connector_info_from_object_table(struct drm_device *dev)
 								i2c_record =
 								    (ATOM_I2C_RECORD
 								     *) record;
+								i2c_id.sbfAccess = i2c_record->sucI2cId;
 								line_mux =
 								    i2c_record->
 								    sucI2cId.
@@ -473,7 +474,7 @@ bool radeon_get_atom_connector_info_from_object_table(struct drm_device *dev)
 							      usDeviceTag),
 						  connector_type, &ddc_bus,
 						  linkb, igp_lane_info,
-						  connector_object_id);
+						  connector_object_id, i2c_id.ucAccess);
 
 		}
 	}
@@ -692,7 +693,7 @@ bool radeon_get_atom_connector_info_from_supported_devices_table(struct
 						  connector_type,
 						  &bios_connectors[i].ddc_bus,
 						  false, 0,
-						  connector_object_id);
+						  connector_object_id, 0);
 		}
 	}
 

drivers/gpu/drm/radeon/radeon_connectors.c

@@ -896,6 +896,54 @@ struct drm_connector_funcs radeon_dvi_connector_funcs = {
 	.force = radeon_dvi_force,
 };
 
+static int radeon_dp_get_modes(struct drm_connector *connector)
+{
+	struct radeon_connector *radeon_connector = to_radeon_connector(connector);
+	int ret;
+
+	ret = radeon_ddc_get_modes(radeon_connector);
+	return ret;
+}
+
+static enum drm_connector_status radeon_dp_detect(struct drm_connector *connector)
+{
+	struct radeon_connector *radeon_connector = to_radeon_connector(connector);
+	struct drm_encoder *encoder = NULL;
+	struct drm_encoder_helper_funcs *encoder_funcs;
+	struct drm_mode_object *obj;
+	int i;
+	enum drm_connector_status ret = connector_status_disconnected;
+	int sink_type;
+	bool dret;
+
+	if (radeon_connector->edid) {
+		kfree(radeon_connector->edid);
+		radeon_connector->edid = NULL;
+	}
+
+	sink_type = radeon_dp_getsinktype(radeon_connector);
+	if (sink_type == CONNECTOR_OBJECT_ID_DISPLAYPORT) {
+		radeon_dp_getdpcp(radeon_connector);
+		ret = connector_status_connected;
+	}
+	return ret;
+}
+
+struct drm_connector_helper_funcs radeon_dp_connector_helper_funcs = {
+	.get_modes = radeon_dp_get_modes,
+	.mode_valid = radeon_dvi_mode_valid,
+	.best_encoder = radeon_dvi_encoder,
+};
+
+struct drm_connector_funcs radeon_dp_connector_funcs = {
+	.dpms = drm_helper_connector_dpms,
+	.detect = radeon_dp_detect,
+	.fill_modes = drm_helper_probe_single_connector_modes,
+	.set_property = radeon_connector_set_property,
+	.destroy = radeon_connector_destroy,
+	.force = radeon_dvi_force,
+};
+
 void
 radeon_add_atom_connector(struct drm_device *dev,
 			  uint32_t connector_id,
@@ -904,7 +952,7 @@ radeon_add_atom_connector(struct drm_device *dev,
 			  struct radeon_i2c_bus_rec *i2c_bus,
 			  bool linkb,
 			  uint32_t igp_lane_info,
-			  uint16_t connector_object_id)
+			  uint16_t connector_object_id, uint8_t uc_i2c_id)
 {
 	struct radeon_device *rdev = dev->dev_private;
 	struct drm_connector *connector;
@@ -1030,10 +1078,13 @@ radeon_add_atom_connector(struct drm_device *dev,
 		radeon_dig_connector->linkb = linkb;
 		radeon_dig_connector->igp_lane_info = igp_lane_info;
 		radeon_connector->con_priv = radeon_dig_connector;
-		drm_connector_init(dev, &radeon_connector->base, &radeon_dvi_connector_funcs, connector_type);
-		ret = drm_connector_helper_add(&radeon_connector->base, &radeon_dvi_connector_helper_funcs);
+		drm_connector_init(dev, &radeon_connector->base, &radeon_dp_connector_funcs, connector_type);
+		ret = drm_connector_helper_add(&radeon_connector->base, &radeon_dp_connector_helper_funcs);
 		if (ret)
 			goto failed;
+		/* add DP i2c bus */
+		radeon_dig_connector->uc_i2c_id = uc_i2c_id;
+		radeon_dig_connector->dp_i2c_bus = radeon_i2c_create_dp(dev, "DP-auxch", true, uc_i2c_id);
 		if (i2c_bus->valid) {
 			radeon_connector->ddc_bus = radeon_i2c_create(dev, i2c_bus, "DP");
 			if (!radeon_connector->ddc_bus)

drivers/gpu/drm/radeon/radeon_display.c

@@ -337,6 +337,13 @@ int radeon_ddc_get_modes(struct radeon_connector *radeon_connector)
 {
 	int ret = 0;
 
+	if (radeon_connector->base.connector_type == DRM_MODE_CONNECTOR_DisplayPort) {
+		struct radeon_connector_atom_dig *dig = radeon_connector->con_priv;
+		if (dig->dp_i2c_bus) {
+			radeon_connector->edid = drm_get_edid(&radeon_connector->base, &dig->dp_i2c_bus->adapter);	
+			DRM_INFO("got edid %p from DP\n", radeon_connector->edid);
+		}
+	}
 	if (!radeon_connector->ddc_bus)
 		return -1;
 	if (!radeon_connector->edid) {

drivers/gpu/drm/radeon/radeon_encoders.c

@@ -850,6 +850,99 @@ atombios_dig_transmitter_setup(struct drm_encoder *encoder, int action)
 
 }
 
+static void
+atombios_dig_transmitter_setup_vsemph(struct drm_encoder *encoder, u8 lane_num,
+				      u8 lane_set)
+{
+	struct drm_device *dev = encoder->dev;
+	struct radeon_device *rdev = dev->dev_private;
+	struct radeon_encoder *radeon_encoder = to_radeon_encoder(encoder);
+	union dig_transmitter_control args;
+	int index = 0, num = 0;
+	uint8_t frev, crev;
+	struct radeon_encoder_atom_dig *dig;
+	struct drm_connector *connector;
+	struct radeon_connector *radeon_connector;
+	struct radeon_connector_atom_dig *dig_connector;
+
+	connector = radeon_get_connector_for_encoder(encoder);
+	if (!connector)
+		return;
+
+	radeon_connector = to_radeon_connector(connector);
+
+	if (!radeon_encoder->enc_priv)
+		return;
+
+	dig = radeon_encoder->enc_priv;
+
+	if (!radeon_connector->con_priv)
+		return;
+
+	dig_connector = radeon_connector->con_priv;
+
+	memset(&args, 0, sizeof(args));
+
+	if (ASIC_IS_DCE32(rdev))
+		index = GetIndexIntoMasterTable(COMMAND, UNIPHYTransmitterControl);
+	else {
+		switch (radeon_encoder->encoder_id) {
+		case ENCODER_OBJECT_ID_INTERNAL_UNIPHY:
+			index = GetIndexIntoMasterTable(COMMAND, DIG1TransmitterControl);
+			break;
+		case ENCODER_OBJECT_ID_INTERNAL_KLDSCP_LVTMA:
+			index = GetIndexIntoMasterTable(COMMAND, DIG2TransmitterControl);
+			break;
+		}
+	}
+
+	atom_parse_cmd_header(rdev->mode_info.atom_context, index, &frev, &crev);
+
+	args.v1.ucAction = ATOM_TRANSMITTER_ACTION_SETUP_VSEMPH;
+	args.v1.asMode.ucLaneSel = lane_num;
+	args.v1.asMode.ucLaneSet = lane_set;
+
+	if (ASIC_IS_DCE32(rdev)) {
+		args.v2.acConfig.fDPConnector = 1;
+
+		if (dig->dig_block)
+			args.v2.acConfig.ucEncoderSel = 1;
+
+		switch (radeon_encoder->encoder_id) {
+		case ENCODER_OBJECT_ID_INTERNAL_UNIPHY:
+			args.v2.acConfig.ucTransmitterSel = 0;
+			num = 0;
+			break;
+		case ENCODER_OBJECT_ID_INTERNAL_UNIPHY1:
+			args.v2.acConfig.ucTransmitterSel = 1;
+			num = 1;
+			break;
+		case ENCODER_OBJECT_ID_INTERNAL_UNIPHY2:
+			args.v2.acConfig.ucTransmitterSel = 2;
+			num = 2;
+			break;
+		}
+	} else {
+		args.v1.ucConfig = ATOM_TRANSMITTER_CONFIG_CLKSRC_PPLL;
+
+		switch (radeon_encoder->encoder_id) {
+		case ENCODER_OBJECT_ID_INTERNAL_UNIPHY:
+			args.v1.ucConfig |= ATOM_TRANSMITTER_CONFIG_DIG1_ENCODER;
+			if (dig_connector->linkb)
+				args.v1.ucConfig |= ATOM_TRANSMITTER_CONFIG_LINKB | ATOM_TRANSMITTER_CONFIG_LANE_0_3;
+			else
+				args.v1.ucConfig |= ATOM_TRANSMITTER_CONFIG_LINKA | ATOM_TRANSMITTER_CONFIG_LANE_0_3;
+		}
+	}
+
+	atom_execute_table(rdev->mode_info.atom_context, index, (uint32_t *)&args);
+
+	if (ASIC_IS_DCE32(rdev))
+		DRM_INFO("Output UNIPHY%d transmitter VSEMPH setup success\n", num);
+	else
+		DRM_INFO("Output DIG%d transmitter VSEMPH setup success\n", num);
+}
+
 static void
 atombios_yuv_setup(struct drm_encoder *encoder, bool enable)
 {

drivers/gpu/drm/radeon/radeon_i2c.c

@@ -172,20 +172,19 @@ struct radeon_i2c_chan *radeon_i2c_create(struct drm_device *dev,
 		return NULL;
 
 	i2c->adapter.owner = THIS_MODULE;
-	i2c->adapter.algo_data = &i2c->algo;
 	i2c->dev = dev;
-	i2c->algo.setsda = set_data;
-	i2c->algo.setscl = set_clock;
-	i2c->algo.getsda = get_data;
-	i2c->algo.getscl = get_clock;
-	i2c->algo.udelay = 20;
+	i2c_set_adapdata(&i2c->adapter, i2c);
+	i2c->adapter.algo_data = &i2c->algo.bit;
+	i2c->algo.bit.setsda = set_data;
+	i2c->algo.bit.setscl = set_clock;
+	i2c->algo.bit.getsda = get_data;
+	i2c->algo.bit.getscl = get_clock;
+	i2c->algo.bit.udelay = 20;
 	/* vesa says 2.2 ms is enough, 1 jiffy doesn't seem to always
 	 * make this, 2 jiffies is a lot more reliable */
-	i2c->algo.timeout = 2;
-	i2c->algo.data = i2c;
+	i2c->algo.bit.timeout = 2;
+	i2c->algo.bit.data = i2c;
 	i2c->rec = *rec;
-	i2c_set_adapdata(&i2c->adapter, i2c);
-
 	ret = i2c_bit_add_bus(&i2c->adapter);
 	if (ret) {
 		DRM_INFO("Failed to register i2c %s\n", name);
@@ -199,6 +198,37 @@ out_free:
 
 }
 
+struct radeon_i2c_chan *radeon_i2c_create_dp(struct drm_device *dev,
+					     const char *name, bool dp, u8 i2c_id)
+{
+	struct radeon_i2c_chan *i2c;
+	int ret;
+
+	i2c = kzalloc(sizeof(struct radeon_i2c_chan), GFP_KERNEL);
+	if (i2c == NULL)
+		return NULL;
+
+	i2c->i2c_id = i2c_id;
+	i2c->adapter.owner = THIS_MODULE;
+	i2c->dev = dev;
+	i2c_set_adapdata(&i2c->adapter, i2c);
+	i2c->adapter.algo_data = &i2c->algo.dp;
+	i2c->algo.dp.aux_ch = radeon_dp_i2c_aux_ch;
+	i2c->algo.dp.address = 0;
+	ret = i2c_dp_aux_add_bus(&i2c->adapter);
+	if (ret) {
+		DRM_INFO("Failed to register i2c %s\n", name);
+		goto out_free;
+	}
+
+	return i2c;
+out_free:
+	kfree(i2c);
+	return NULL;
+
+}
+
+
 void radeon_i2c_destroy(struct radeon_i2c_chan *i2c)
 {
 	if (!i2c)

drivers/gpu/drm/radeon/radeon_mode.h

@@ -33,6 +33,7 @@
 #include <drm_crtc.h>
 #include <drm_mode.h>
 #include <drm_edid.h>
+#include <drm_dp_helper.h>
 #include <linux/i2c.h>
 #include <linux/i2c-id.h>
 #include <linux/i2c-algo-bit.h>
@@ -164,10 +165,14 @@ struct radeon_pll {
 };
 
 struct radeon_i2c_chan {
-	struct drm_device *dev;
 	struct i2c_adapter adapter;
-	struct i2c_algo_bit_data algo;
+	struct drm_device *dev;
+	union {
+		struct i2c_algo_dp_aux_data dp;
+		struct i2c_algo_bit_data bit;
+	} algo;
 	struct radeon_i2c_bus_rec rec;
+	uint8_t i2c_id;
 };
 
 /* mostly for macs, but really any system without connector tables */
@@ -328,6 +333,9 @@ struct radeon_encoder {
 struct radeon_connector_atom_dig {
 	uint32_t igp_lane_info;
 	bool linkb;
+	uint16_t uc_i2c_id;
+	struct radeon_i2c_chan *dp_i2c_bus;
+	u8 dpcp[8];
 };
 
 struct radeon_connector {
@@ -344,6 +352,8 @@ struct radeon_connector {
 	void *con_priv;
 	bool dac_load_detect;
 	uint16_t connector_object_id;
+	/* need to keep this for display port */
+//	
 };
 
 struct radeon_framebuffer {
@@ -351,6 +361,13 @@ struct radeon_framebuffer {
 	struct drm_gem_object *obj;
 };
 
+extern int radeon_dp_getsinktype(struct radeon_connector *radeon_connector);
+extern void radeon_dp_getdpcp(struct radeon_connector *connector);
+extern int radeon_dp_i2c_aux_ch(struct i2c_adapter *adapter, int mode,
+				uint8_t write_byte, uint8_t *read_byte);
+
+extern struct radeon_i2c_chan *radeon_i2c_create_dp(struct drm_device *dev,
+						    const char *name, bool dp, u8 i2c_id);
 extern struct radeon_i2c_chan *radeon_i2c_create(struct drm_device *dev,
 						 struct radeon_i2c_bus_rec *rec,
 						 const char *name);

include/drm/drm_dp_helper.h

@@ -43,6 +43,8 @@
 #define AUX_I2C_REPLY_MASK	(0x3 << 6)
 
 /* AUX CH addresses */
+#define DP_DPCP_REV 0x0
+
 #define	DP_LINK_BW_SET		0x100
 # define DP_LINK_BW_1_62		    0x06
 # define DP_LINK_BW_2_7			    0x0a