exynos: video: Drop static variables in exynos_dp_lowlevel.c

Drop these and use parameters instead.

Signed-off-by: Simon Glass <sjg@chromium.org>
Acked-by: Anatolij Gustschin <agust@denx.de>
Signed-off-by: Minkyu Kang <mk7.kang@samsung.com>

3 files changed, 351 insertions, 285 deletions

diff --git a/drivers/video/exynos/exynos_dp.c b/drivers/video/exynos/exynos_dp.c
index 0d5d090d0e..9945c4bcf9 100644
--- a/drivers/video/exynos/exynos_dp.c
+++ b/drivers/video/exynos/exynos_dp.c
@@ -38,20 +38,20 @@ static void exynos_dp_disp_info(struct edp_disp_info *disp_info)
 	return;
 }
 
-static int exynos_dp_init_dp(void)
+static int exynos_dp_init_dp(struct exynos_dp *dp_regs)
 {
 	int ret;
-	exynos_dp_reset();
+	exynos_dp_reset(dp_regs);
 
 	/* SW defined function Normal operation */
-	exynos_dp_enable_sw_func(DP_ENABLE);
+	exynos_dp_enable_sw_func(dp_regs, DP_ENABLE);
 
-	ret = exynos_dp_init_analog_func();
+	ret = exynos_dp_init_analog_func(dp_regs);
 	if (ret != EXYNOS_DP_SUCCESS)
 		return ret;
 
-	exynos_dp_init_hpd();
-	exynos_dp_init_aux();
+	exynos_dp_init_hpd(dp_regs);
+	exynos_dp_init_aux(dp_regs);
 
 	return ret;
 }
@@ -67,7 +67,7 @@ static unsigned char exynos_dp_calc_edid_check_sum(unsigned char *edid_data)
 	return sum;
 }
 
-static unsigned int exynos_dp_read_edid(void)
+static unsigned int exynos_dp_read_edid(struct exynos_dp *dp_regs)
 {
 	unsigned char edid[EDID_BLOCK_LENGTH * 2];
 	unsigned int extend_block = 0;
@@ -82,14 +82,15 @@ static unsigned int exynos_dp_read_edid(void)
 	 */
 
 	/* Read Extension Flag, Number of 128-byte EDID extension blocks */
-	exynos_dp_read_byte_from_i2c(I2C_EDID_DEVICE_ADDR, EDID_EXTENSION_FLAG,
-			&extend_block);
+	exynos_dp_read_byte_from_i2c(dp_regs, I2C_EDID_DEVICE_ADDR,
+				     EDID_EXTENSION_FLAG, &extend_block);
 
 	if (extend_block > 0) {
 		printf("DP EDID data includes a single extension!\n");
 
 		/* Read EDID data */
-		retval = exynos_dp_read_bytes_from_i2c(I2C_EDID_DEVICE_ADDR,
+		retval = exynos_dp_read_bytes_from_i2c(dp_regs,
+						I2C_EDID_DEVICE_ADDR,
 						EDID_HEADER_PATTERN,
 						EDID_BLOCK_LENGTH,
 						&edid[EDID_HEADER_PATTERN]);
@@ -104,7 +105,8 @@ static unsigned int exynos_dp_read_edid(void)
 		}
 
 		/* Read additional EDID data */
-		retval = exynos_dp_read_bytes_from_i2c(I2C_EDID_DEVICE_ADDR,
+		retval = exynos_dp_read_bytes_from_i2c(dp_regs,
+				I2C_EDID_DEVICE_ADDR,
 				EDID_BLOCK_LENGTH,
 				EDID_BLOCK_LENGTH,
 				&edid[EDID_BLOCK_LENGTH]);
@@ -118,19 +120,22 @@ static unsigned int exynos_dp_read_edid(void)
 			return -1;
 		}
 
-		exynos_dp_read_byte_from_dpcd(DPCD_TEST_REQUEST,
-					&test_vector);
+		exynos_dp_read_byte_from_dpcd(dp_regs, DPCD_TEST_REQUEST,
+					      &test_vector);
 		if (test_vector & DPCD_TEST_EDID_READ) {
-			exynos_dp_write_byte_to_dpcd(DPCD_TEST_EDID_CHECKSUM,
+			exynos_dp_write_byte_to_dpcd(dp_regs,
+				DPCD_TEST_EDID_CHECKSUM,
 				edid[EDID_BLOCK_LENGTH + EDID_CHECKSUM]);
-			exynos_dp_write_byte_to_dpcd(DPCD_TEST_RESPONSE,
+			exynos_dp_write_byte_to_dpcd(dp_regs,
+				DPCD_TEST_RESPONSE,
 				DPCD_TEST_EDID_CHECKSUM_WRITE);
 		}
 	} else {
 		debug("DP EDID data does not include any extensions.\n");
 
 		/* Read EDID data */
-		retval = exynos_dp_read_bytes_from_i2c(I2C_EDID_DEVICE_ADDR,
+		retval = exynos_dp_read_bytes_from_i2c(dp_regs,
+				I2C_EDID_DEVICE_ADDR,
 				EDID_HEADER_PATTERN,
 				EDID_BLOCK_LENGTH,
 				&edid[EDID_HEADER_PATTERN]);
@@ -145,12 +150,13 @@ static unsigned int exynos_dp_read_edid(void)
 			return -1;
 		}
 
-		exynos_dp_read_byte_from_dpcd(DPCD_TEST_REQUEST,
+		exynos_dp_read_byte_from_dpcd(dp_regs, DPCD_TEST_REQUEST,
 			&test_vector);
 		if (test_vector & DPCD_TEST_EDID_READ) {
-			exynos_dp_write_byte_to_dpcd(DPCD_TEST_EDID_CHECKSUM,
-				edid[EDID_CHECKSUM]);
-			exynos_dp_write_byte_to_dpcd(DPCD_TEST_RESPONSE,
+			exynos_dp_write_byte_to_dpcd(dp_regs,
+				DPCD_TEST_EDID_CHECKSUM, edid[EDID_CHECKSUM]);
+			exynos_dp_write_byte_to_dpcd(dp_regs,
+				DPCD_TEST_RESPONSE,
 				DPCD_TEST_EDID_CHECKSUM_WRITE);
 		}
 	}
@@ -160,7 +166,8 @@ static unsigned int exynos_dp_read_edid(void)
 	return 0;
 }
 
-static unsigned int exynos_dp_handle_edid(struct edp_device_info *edp_info)
+static unsigned int exynos_dp_handle_edid(struct exynos_dp *dp_regs,
+					  struct edp_device_info *edp_info)
 {
 	unsigned char buf[12];
 	unsigned int ret;
@@ -178,8 +185,8 @@ static unsigned int exynos_dp_handle_edid(struct edp_device_info *edp_info)
 	retry_cnt = 5;
 	while (retry_cnt) {
 		/* Read DPCD 0x0000-0x000b */
-		ret = exynos_dp_read_bytes_from_dpcd(DPCD_DPCD_REV, 12,
-				buf);
+		ret = exynos_dp_read_bytes_from_dpcd(dp_regs, DPCD_DPCD_REV, 12,
+						     buf);
 		if (ret != EXYNOS_DP_SUCCESS) {
 			if (retry_cnt == 0) {
 				printf("DP read_byte_from_dpcd() failed\n");
@@ -227,7 +234,7 @@ static unsigned int exynos_dp_handle_edid(struct edp_device_info *edp_info)
 		return -EINVAL;
 	}
 
-	ret = exynos_dp_read_edid();
+	ret = exynos_dp_read_edid(dp_regs);
 	if (ret != EXYNOS_DP_SUCCESS) {
 		printf("DP exynos_dp_read_edid() failed\n");
 		return -EINVAL;
@@ -236,19 +243,20 @@ static unsigned int exynos_dp_handle_edid(struct edp_device_info *edp_info)
 	return ret;
 }
 
-static void exynos_dp_init_training(void)
+static void exynos_dp_init_training(struct exynos_dp *dp_regs)
 {
 	/*
 	 * MACRO_RST must be applied after the PLL_LOCK to avoid
 	 * the DP inter pair skew issue for at least 10 us
 	 */
-	exynos_dp_reset_macro();
+	exynos_dp_reset_macro(dp_regs);
 
 	/* All DP analog module power up */
-	exynos_dp_set_analog_power_down(POWER_ALL, 0);
+	exynos_dp_set_analog_power_down(dp_regs, POWER_ALL, 0);
 }
 
-static unsigned int exynos_dp_link_start(struct edp_device_info *edp_info)
+static unsigned int exynos_dp_link_start(struct exynos_dp *dp_regs,
+					 struct edp_device_info *edp_info)
 {
 	unsigned char buf[5];
 	unsigned int ret = 0;
@@ -263,33 +271,32 @@ static unsigned int exynos_dp_link_start(struct edp_device_info *edp_info)
 	edp_info->lt_info.cr_loop[3] = 0;
 
 		/* Set sink to D0 (Sink Not Ready) mode. */
-		ret = exynos_dp_write_byte_to_dpcd(DPCD_SINK_POWER_STATE,
-				DPCD_SET_POWER_STATE_D0);
+	ret = exynos_dp_write_byte_to_dpcd(dp_regs, DPCD_SINK_POWER_STATE,
+					   DPCD_SET_POWER_STATE_D0);
 	if (ret != EXYNOS_DP_SUCCESS) {
 		printf("DP write_dpcd_byte failed\n");
 		return ret;
 	}
 
 	/* Set link rate and count as you want to establish */
-	exynos_dp_set_link_bandwidth(edp_info->lane_bw);
-	exynos_dp_set_lane_count(edp_info->lane_cnt);
+	exynos_dp_set_link_bandwidth(dp_regs, edp_info->lane_bw);
+	exynos_dp_set_lane_count(dp_regs, edp_info->lane_cnt);
 
 	/* Setup RX configuration */
 	buf[0] = edp_info->lane_bw;
 	buf[1] = edp_info->lane_cnt;
 
-	ret = exynos_dp_write_bytes_to_dpcd(DPCD_LINK_BW_SET, 2,
-			buf);
+	ret = exynos_dp_write_bytes_to_dpcd(dp_regs, DPCD_LINK_BW_SET, 2, buf);
 	if (ret != EXYNOS_DP_SUCCESS) {
 		printf("DP write_dpcd_byte failed\n");
 		return ret;
 	}
 
-	exynos_dp_set_lane_pre_emphasis(PRE_EMPHASIS_LEVEL_0,
+	exynos_dp_set_lane_pre_emphasis(dp_regs, PRE_EMPHASIS_LEVEL_0,
 			edp_info->lane_cnt);
 
 	/* Set training pattern 1 */
-	exynos_dp_set_training_pattern(TRAINING_PTN1);
+	exynos_dp_set_training_pattern(dp_regs, TRAINING_PTN1);
 
 	/* Set RX training pattern */
 	buf[0] = DPCD_SCRAMBLING_DISABLED | DPCD_TRAINING_PATTERN_1;
@@ -303,8 +310,8 @@ static unsigned int exynos_dp_link_start(struct edp_device_info *edp_info)
 	buf[4] = DPCD_PRE_EMPHASIS_SET_PATTERN_2_LEVEL_0 |
 		DPCD_VOLTAGE_SWING_SET_PATTERN_1_LEVEL_0;
 
-	ret = exynos_dp_write_bytes_to_dpcd(DPCD_TRAINING_PATTERN_SET,
-			5, buf);
+	ret = exynos_dp_write_bytes_to_dpcd(dp_regs, DPCD_TRAINING_PATTERN_SET,
+					    5, buf);
 	if (ret != EXYNOS_DP_SUCCESS) {
 		printf("DP write_dpcd_byte failed\n");
 		return ret;
@@ -313,14 +320,14 @@ static unsigned int exynos_dp_link_start(struct edp_device_info *edp_info)
 	return ret;
 }
 
-static unsigned int exynos_dp_training_pattern_dis(void)
+static unsigned int exynos_dp_training_pattern_dis(struct exynos_dp *dp_regs)
 {
 	unsigned int ret = EXYNOS_DP_SUCCESS;
 
-	exynos_dp_set_training_pattern(DP_NONE);
+	exynos_dp_set_training_pattern(dp_regs, DP_NONE);
 
-	ret = exynos_dp_write_byte_to_dpcd(DPCD_TRAINING_PATTERN_SET,
-			DPCD_TRAINING_PATTERN_DISABLED);
+	ret = exynos_dp_write_byte_to_dpcd(dp_regs, DPCD_TRAINING_PATTERN_SET,
+					   DPCD_TRAINING_PATTERN_DISABLED);
 	if (ret != EXYNOS_DP_SUCCESS) {
 		printf("DP request_link_training_req failed\n");
 		return -EAGAIN;
@@ -329,13 +336,14 @@ static unsigned int exynos_dp_training_pattern_dis(void)
 	return ret;
 }
 
-static unsigned int exynos_dp_enable_rx_to_enhanced_mode(unsigned char enable)
+static unsigned int exynos_dp_enable_rx_to_enhanced_mode(
+		struct exynos_dp *dp_regs, unsigned char enable)
 {
 	unsigned char data;
 	unsigned int ret = EXYNOS_DP_SUCCESS;
 
-	ret = exynos_dp_read_byte_from_dpcd(DPCD_LANE_COUNT_SET,
-			&data);
+	ret = exynos_dp_read_byte_from_dpcd(dp_regs, DPCD_LANE_COUNT_SET,
+					    &data);
 	if (ret != EXYNOS_DP_SUCCESS) {
 		printf("DP read_from_dpcd failed\n");
 		return -EAGAIN;
@@ -346,8 +354,7 @@ static unsigned int exynos_dp_enable_rx_to_enhanced_mode(unsigned char enable)
 	else
 		data = DPCD_LN_COUNT_SET(data);
 
-	ret = exynos_dp_write_byte_to_dpcd(DPCD_LANE_COUNT_SET,
-			data);
+	ret = exynos_dp_write_byte_to_dpcd(dp_regs, DPCD_LANE_COUNT_SET, data);
 	if (ret != EXYNOS_DP_SUCCESS) {
 			printf("DP write_to_dpcd failed\n");
 			return -EAGAIN;
@@ -357,23 +364,25 @@ static unsigned int exynos_dp_enable_rx_to_enhanced_mode(unsigned char enable)
 	return ret;
 }
 
-static unsigned int exynos_dp_set_enhanced_mode(unsigned char enhance_mode)
+static unsigned int exynos_dp_set_enhanced_mode(struct exynos_dp *dp_regs,
+						unsigned char enhance_mode)
 {
 	unsigned int ret = EXYNOS_DP_SUCCESS;
 
-	ret = exynos_dp_enable_rx_to_enhanced_mode(enhance_mode);
+	ret = exynos_dp_enable_rx_to_enhanced_mode(dp_regs, enhance_mode);
 	if (ret != EXYNOS_DP_SUCCESS) {
 		printf("DP rx_enhance_mode failed\n");
 		return -EAGAIN;
 	}
 
-	exynos_dp_enable_enhanced_mode(enhance_mode);
+	exynos_dp_enable_enhanced_mode(dp_regs, enhance_mode);
 
 	return ret;
 }
 
-static int exynos_dp_read_dpcd_lane_stat(struct edp_device_info *edp_info,
-		unsigned char *status)
+static int exynos_dp_read_dpcd_lane_stat(struct exynos_dp *dp_regs,
+					 struct edp_device_info *edp_info,
+					 unsigned char *status)
 {
 	unsigned int ret, i;
 	unsigned char buf[2];
@@ -385,7 +394,8 @@ static int exynos_dp_read_dpcd_lane_stat(struct edp_device_info *edp_info,
 	shift_val[2] = 0;
 	shift_val[3] = 4;
 
-	ret = exynos_dp_read_bytes_from_dpcd(DPCD_LANE0_1_STATUS, 2, buf);
+	ret = exynos_dp_read_bytes_from_dpcd(dp_regs, DPCD_LANE0_1_STATUS, 2,
+					     buf);
 	if (ret != EXYNOS_DP_SUCCESS) {
 		printf("DP read lane status failed\n");
 		return ret;
@@ -404,8 +414,8 @@ static int exynos_dp_read_dpcd_lane_stat(struct edp_device_info *edp_info,
 	return ret;
 }
 
-static unsigned int exynos_dp_read_dpcd_adj_req(unsigned char lane_num,
-		unsigned char *sw, unsigned char *em)
+static unsigned int exynos_dp_read_dpcd_adj_req(struct exynos_dp *dp_regs,
+		unsigned char lane_num, unsigned char *sw, unsigned char *em)
 {
 	unsigned int ret = EXYNOS_DP_SUCCESS;
 	unsigned char buf;
@@ -415,7 +425,7 @@ static unsigned int exynos_dp_read_dpcd_adj_req(unsigned char lane_num,
 	/* lane_num value is used as array index, so this range 0 ~ 3 */
 	dpcd_addr = DPCD_ADJUST_REQUEST_LANE0_1 + (lane_num / 2);
 
-	ret = exynos_dp_read_byte_from_dpcd(dpcd_addr, &buf);
+	ret = exynos_dp_read_byte_from_dpcd(dp_regs, dpcd_addr, &buf);
 	if (ret != EXYNOS_DP_SUCCESS) {
 		printf("DP read adjust request failed\n");
 		return -EAGAIN;
@@ -427,17 +437,18 @@ static unsigned int exynos_dp_read_dpcd_adj_req(unsigned char lane_num,
 	return ret;
 }
 
-static int exynos_dp_equalizer_err_link(struct edp_device_info *edp_info)
+static int exynos_dp_equalizer_err_link(struct exynos_dp *dp_regs,
+					struct edp_device_info *edp_info)
 {
 	int ret;
 
-	ret = exynos_dp_training_pattern_dis();
+	ret = exynos_dp_training_pattern_dis(dp_regs);
 	if (ret != EXYNOS_DP_SUCCESS) {
 		printf("DP training_pattern_disable() failed\n");
 		edp_info->lt_info.lt_status = DP_LT_FAIL;
 	}
 
-	ret = exynos_dp_set_enhanced_mode(edp_info->dpcd_efc);
+	ret = exynos_dp_set_enhanced_mode(dp_regs, edp_info->dpcd_efc);
 	if (ret != EXYNOS_DP_SUCCESS) {
 		printf("DP set_enhanced_mode() failed\n");
 		edp_info->lt_info.lt_status = DP_LT_FAIL;
@@ -446,7 +457,8 @@ static int exynos_dp_equalizer_err_link(struct edp_device_info *edp_info)
 	return ret;
 }
 
-static int exynos_dp_reduce_link_rate(struct edp_device_info *edp_info)
+static int exynos_dp_reduce_link_rate(struct exynos_dp *dp_regs,
+				      struct edp_device_info *edp_info)
 {
 	int ret;
 
@@ -456,11 +468,11 @@ static int exynos_dp_reduce_link_rate(struct edp_device_info *edp_info)
 		edp_info->lt_info.lt_status = DP_LT_START;
 		ret = EXYNOS_DP_SUCCESS;
 	} else {
-		ret = exynos_dp_training_pattern_dis();
+		ret = exynos_dp_training_pattern_dis(dp_regs);
 		if (ret != EXYNOS_DP_SUCCESS)
 			printf("DP training_patter_disable() failed\n");
 
-		ret = exynos_dp_set_enhanced_mode(edp_info->dpcd_efc);
+		ret = exynos_dp_set_enhanced_mode(dp_regs, edp_info->dpcd_efc);
 		if (ret != EXYNOS_DP_SUCCESS)
 			printf("DP set_enhanced_mode() failed\n");
 
@@ -470,8 +482,8 @@ static int exynos_dp_reduce_link_rate(struct edp_device_info *edp_info)
 	return ret;
 }
 
-static unsigned int exynos_dp_process_clock_recovery(struct edp_device_info
-							*edp_info)
+static unsigned int exynos_dp_process_clock_recovery(struct exynos_dp *dp_regs,
+					struct edp_device_info *edp_info)
 {
 	unsigned int ret = EXYNOS_DP_SUCCESS;
 	unsigned char lane_stat;
@@ -484,7 +496,7 @@ static unsigned int exynos_dp_process_clock_recovery(struct edp_device_info
 	debug("DP: %s was called\n", __func__);
 	mdelay(1);
 
-	ret = exynos_dp_read_dpcd_lane_stat(edp_info, &lane_stat);
+	ret = exynos_dp_read_dpcd_lane_stat(dp_regs, edp_info, &lane_stat);
 	if (ret != EXYNOS_DP_SUCCESS) {
 			printf("DP read lane status failed\n");
 			edp_info->lt_info.lt_status = DP_LT_FAIL;
@@ -493,11 +505,11 @@ static unsigned int exynos_dp_process_clock_recovery(struct edp_device_info
 
 	if (lane_stat & DP_LANE_STAT_CR_DONE) {
 		debug("DP clock Recovery training succeed\n");
-		exynos_dp_set_training_pattern(TRAINING_PTN2);
+		exynos_dp_set_training_pattern(dp_regs, TRAINING_PTN2);
 
 		for (i = 0; i < edp_info->lane_cnt; i++) {
-			ret = exynos_dp_read_dpcd_adj_req(i, &adj_req_sw,
-					&adj_req_em);
+			ret = exynos_dp_read_dpcd_adj_req(dp_regs, i,
+						&adj_req_sw, &adj_req_em);
 			if (ret != EXYNOS_DP_SUCCESS) {
 				edp_info->lt_info.lt_status = DP_LT_FAIL;
 				return ret;
@@ -511,7 +523,8 @@ static unsigned int exynos_dp_process_clock_recovery(struct edp_device_info
 				lt_ctl_val[i] |= MAX_DRIVE_CURRENT_REACH_3 |
 					MAX_PRE_EMPHASIS_REACH_3;
 			}
-			exynos_dp_set_lanex_pre_emphasis(lt_ctl_val[i], i);
+			exynos_dp_set_lanex_pre_emphasis(dp_regs,
+							 lt_ctl_val[i], i);
 		}
 
 		buf[0] =  DPCD_SCRAMBLING_DISABLED | DPCD_TRAINING_PATTERN_2;
@@ -520,7 +533,7 @@ static unsigned int exynos_dp_process_clock_recovery(struct edp_device_info
 		buf[3] = lt_ctl_val[2];
 		buf[4] = lt_ctl_val[3];
 
-		ret = exynos_dp_write_bytes_to_dpcd(
+		ret = exynos_dp_write_bytes_to_dpcd(dp_regs,
 				DPCD_TRAINING_PATTERN_SET, 5, buf);
 		if (ret != EXYNOS_DP_SUCCESS) {
 			printf("DP write training pattern1 failed\n");
@@ -530,8 +543,9 @@ static unsigned int exynos_dp_process_clock_recovery(struct edp_device_info
 			edp_info->lt_info.lt_status = DP_LT_ET;
 	} else {
 		for (i = 0; i < edp_info->lane_cnt; i++) {
-			lt_ctl_val[i] = exynos_dp_get_lanex_pre_emphasis(i);
-				ret = exynos_dp_read_dpcd_adj_req(i,
+			lt_ctl_val[i] = exynos_dp_get_lanex_pre_emphasis(
+						dp_regs, i);
+				ret = exynos_dp_read_dpcd_adj_req(dp_regs, i,
 						&adj_req_sw, &adj_req_em);
 			if (ret != EXYNOS_DP_SUCCESS) {
 				printf("DP read adj req failed\n");
@@ -541,7 +555,8 @@ static unsigned int exynos_dp_process_clock_recovery(struct edp_device_info
 
 			if ((adj_req_sw == VOLTAGE_LEVEL_3) ||
 					(adj_req_em == PRE_EMPHASIS_LEVEL_3))
-				ret = exynos_dp_reduce_link_rate(edp_info);
+				ret = exynos_dp_reduce_link_rate(dp_regs,
+								 edp_info);
 
 			if ((DRIVE_CURRENT_SET_0_GET(lt_ctl_val[i]) ==
 						adj_req_sw) &&
@@ -550,7 +565,7 @@ static unsigned int exynos_dp_process_clock_recovery(struct edp_device_info
 				edp_info->lt_info.cr_loop[i]++;
 				if (edp_info->lt_info.cr_loop[i] == MAX_CR_LOOP)
 					ret = exynos_dp_reduce_link_rate(
-							edp_info);
+							dp_regs, edp_info);
 			}
 
 			lt_ctl_val[i] = 0;
@@ -561,10 +576,11 @@ static unsigned int exynos_dp_process_clock_recovery(struct edp_device_info
 				lt_ctl_val[i] |= MAX_DRIVE_CURRENT_REACH_3 |
 					MAX_PRE_EMPHASIS_REACH_3;
 			}
-			exynos_dp_set_lanex_pre_emphasis(lt_ctl_val[i], i);
+			exynos_dp_set_lanex_pre_emphasis(dp_regs,
+							 lt_ctl_val[i], i);
 		}
 
-		ret = exynos_dp_write_bytes_to_dpcd(
+		ret = exynos_dp_write_bytes_to_dpcd(dp_regs,
 				DPCD_TRAINING_LANE0_SET, 4, lt_ctl_val);
 		if (ret != EXYNOS_DP_SUCCESS) {
 			printf("DP write training pattern2 failed\n");
@@ -576,8 +592,8 @@ static unsigned int exynos_dp_process_clock_recovery(struct edp_device_info
 	return ret;
 }
 
-static unsigned int exynos_dp_process_equalizer_training(struct edp_device_info
-		*edp_info)
+static unsigned int exynos_dp_process_equalizer_training(
+		struct exynos_dp *dp_regs, struct edp_device_info *edp_info)
 {
 	unsigned int ret = EXYNOS_DP_SUCCESS;
 	unsigned char lane_stat, adj_req_sw, adj_req_em, i;
@@ -589,7 +605,7 @@ static unsigned int exynos_dp_process_equalizer_training(struct edp_device_info
 
 	mdelay(1);
 
-	ret = exynos_dp_read_dpcd_lane_stat(edp_info, &lane_stat);
+	ret = exynos_dp_read_dpcd_lane_stat(dp_regs, edp_info, &lane_stat);
 	if (ret != EXYNOS_DP_SUCCESS) {
 		printf("DP read lane status failed\n");
 		edp_info->lt_info.lt_status = DP_LT_FAIL;
@@ -599,8 +615,9 @@ static unsigned int exynos_dp_process_equalizer_training(struct edp_device_info
 	debug("DP lane stat : %x\n", lane_stat);
 
 	if (lane_stat & DP_LANE_STAT_CR_DONE) {
-		ret = exynos_dp_read_byte_from_dpcd(DPCD_LN_ALIGN_UPDATED,
-				&sink_stat);
+		ret = exynos_dp_read_byte_from_dpcd(dp_regs,
+						    DPCD_LN_ALIGN_UPDATED,
+						    &sink_stat);
 		if (ret != EXYNOS_DP_SUCCESS) {
 			edp_info->lt_info.lt_status = DP_LT_FAIL;
 
@@ -610,7 +627,7 @@ static unsigned int exynos_dp_process_equalizer_training(struct edp_device_info
 		interlane_aligned = (sink_stat & DPCD_INTERLANE_ALIGN_DONE);
 
 		for (i = 0; i < edp_info->lane_cnt; i++) {
-			ret = exynos_dp_read_dpcd_adj_req(i,
+			ret = exynos_dp_read_dpcd_adj_req(dp_regs, i,
 					&adj_req_sw, &adj_req_em);
 			if (ret != EXYNOS_DP_SUCCESS) {
 				printf("DP read adj req 1 failed\n");
@@ -634,15 +651,15 @@ static unsigned int exynos_dp_process_equalizer_training(struct edp_device_info
 			&& (interlane_aligned == DPCD_INTERLANE_ALIGN_DONE)) {
 			debug("DP Equalizer training succeed\n");
 
-			f_bw = exynos_dp_get_link_bandwidth();
-			f_lane_cnt = exynos_dp_get_lane_count();
+			f_bw = exynos_dp_get_link_bandwidth(dp_regs);
+			f_lane_cnt = exynos_dp_get_lane_count(dp_regs);
 
 			debug("DP final BandWidth : %x\n", f_bw);
 			debug("DP final Lane Count : %x\n", f_lane_cnt);
 
 			edp_info->lt_info.lt_status = DP_LT_FINISHED;
 
-			exynos_dp_equalizer_err_link(edp_info);
+			exynos_dp_equalizer_err_link(dp_regs, edp_info);
 
 		} else {
 			edp_info->lt_info.ep_loop++;
@@ -650,46 +667,49 @@ static unsigned int exynos_dp_process_equalizer_training(struct edp_device_info
 			if (edp_info->lt_info.ep_loop > MAX_EQ_LOOP) {
 				if (edp_info->lane_bw == DP_LANE_BW_2_70) {
 					ret = exynos_dp_reduce_link_rate(
-							edp_info);
+							dp_regs, edp_info);
 				} else {
 					edp_info->lt_info.lt_status =
 								DP_LT_FAIL;
-					exynos_dp_equalizer_err_link(edp_info);
+					exynos_dp_equalizer_err_link(dp_regs,
+								     edp_info);
 				}
 			} else {
 				for (i = 0; i < edp_info->lane_cnt; i++)
 					exynos_dp_set_lanex_pre_emphasis(
-							lt_ctl_val[i], i);
+						dp_regs, lt_ctl_val[i], i);
 
-				ret = exynos_dp_write_bytes_to_dpcd(
-					DPCD_TRAINING_LANE0_SET,
-					4, lt_ctl_val);
+				ret = exynos_dp_write_bytes_to_dpcd(dp_regs,
+						DPCD_TRAINING_LANE0_SET,
+						4, lt_ctl_val);
 				if (ret != EXYNOS_DP_SUCCESS) {
 					printf("DP set lt pattern failed\n");
 					edp_info->lt_info.lt_status =
 								DP_LT_FAIL;
-					exynos_dp_equalizer_err_link(edp_info);
+					exynos_dp_equalizer_err_link(dp_regs,
+								     edp_info);
 				}
 			}
 		}
 	} else if (edp_info->lane_bw == DP_LANE_BW_2_70) {
-		ret = exynos_dp_reduce_link_rate(edp_info);
+		ret = exynos_dp_reduce_link_rate(dp_regs, edp_info);
 	} else {
 		edp_info->lt_info.lt_status = DP_LT_FAIL;
-		exynos_dp_equalizer_err_link(edp_info);
+		exynos_dp_equalizer_err_link(dp_regs, edp_info);
 	}
 
 	return ret;
 }
 
-static unsigned int exynos_dp_sw_link_training(struct edp_device_info *edp_info)
+static unsigned int exynos_dp_sw_link_training(struct exynos_dp *dp_regs,
+					       struct edp_device_info *edp_info)
 {
 	unsigned int ret = 0;
 	int training_finished;
 
 	/* Turn off unnecessary lane */
 	if (edp_info->lane_cnt == 1)
-		exynos_dp_set_analog_power_down(CH1_BLOCK, 1);
+		exynos_dp_set_analog_power_down(dp_regs, CH1_BLOCK, 1);
 
 	training_finished = 0;
 
@@ -699,21 +719,23 @@ static unsigned int exynos_dp_sw_link_training(struct edp_device_info *edp_info)
 	while (!training_finished) {
 		switch (edp_info->lt_info.lt_status) {
 		case DP_LT_START:
-			ret = exynos_dp_link_start(edp_info);
+			ret = exynos_dp_link_start(dp_regs, edp_info);
 			if (ret != EXYNOS_DP_SUCCESS) {
 				printf("DP LT:link start failed\n");
 				return ret;
 			}
 			break;
 		case DP_LT_CR:
-			ret = exynos_dp_process_clock_recovery(edp_info);
+			ret = exynos_dp_process_clock_recovery(dp_regs,
+							       edp_info);
 			if (ret != EXYNOS_DP_SUCCESS) {
 				printf("DP LT:clock recovery failed\n");
 				return ret;
 			}
 			break;
 		case DP_LT_ET:
-			ret = exynos_dp_process_equalizer_training(edp_info);
+			ret = exynos_dp_process_equalizer_training(dp_regs,
+								   edp_info);
 			if (ret != EXYNOS_DP_SUCCESS) {
 				printf("DP LT:equalizer training failed\n");
 				return ret;
@@ -730,40 +752,43 @@ static unsigned int exynos_dp_sw_link_training(struct edp_device_info *edp_info)
 	return ret;
 }
 
-static unsigned int exynos_dp_set_link_train(struct edp_device_info *edp_info)
+static unsigned int exynos_dp_set_link_train(struct exynos_dp *dp_regs,
+					     struct edp_device_info *edp_info)
 {
 	unsigned int ret;
 
-	exynos_dp_init_training();
+	exynos_dp_init_training(dp_regs);
 
-	ret = exynos_dp_sw_link_training(edp_info);
+	ret = exynos_dp_sw_link_training(dp_regs, edp_info);
 	if (ret != EXYNOS_DP_SUCCESS)
 		printf("DP dp_sw_link_training() failed\n");
 
 	return ret;
 }
 
-static void exynos_dp_enable_scramble(unsigned int enable)
+static void exynos_dp_enable_scramble(struct exynos_dp *dp_regs,
+				      unsigned int enable)
 {
 	unsigned char data;
 
 	if (enable) {
-		exynos_dp_enable_scrambling(DP_ENABLE);
+		exynos_dp_enable_scrambling(dp_regs, DP_ENABLE);
 
-		exynos_dp_read_byte_from_dpcd(DPCD_TRAINING_PATTERN_SET,
-				&data);
-		exynos_dp_write_byte_to_dpcd(DPCD_TRAINING_PATTERN_SET,
+		exynos_dp_read_byte_from_dpcd(dp_regs,
+					      DPCD_TRAINING_PATTERN_SET, &data);
+		exynos_dp_write_byte_to_dpcd(dp_regs, DPCD_TRAINING_PATTERN_SET,
 			(u8)(data & ~DPCD_SCRAMBLING_DISABLED));
 	} else {
-		exynos_dp_enable_scrambling(DP_DISABLE);
-		exynos_dp_read_byte_from_dpcd(DPCD_TRAINING_PATTERN_SET,
-				&data);
-		exynos_dp_write_byte_to_dpcd(DPCD_TRAINING_PATTERN_SET,
+		exynos_dp_enable_scrambling(dp_regs, DP_DISABLE);
+		exynos_dp_read_byte_from_dpcd(dp_regs,
+					      DPCD_TRAINING_PATTERN_SET, &data);
+		exynos_dp_write_byte_to_dpcd(dp_regs, DPCD_TRAINING_PATTERN_SET,
 			(u8)(data | DPCD_SCRAMBLING_DISABLED));
 	}
 }
 
-static unsigned int exynos_dp_config_video(struct edp_device_info *edp_info)
+static unsigned int exynos_dp_config_video(struct exynos_dp *dp_regs,
+					   struct edp_device_info *edp_info)
 {
 	unsigned int ret = 0;
 	unsigned int retry_cnt;
@@ -775,17 +800,18 @@ static unsigned int exynos_dp_config_video(struct edp_device_info *edp_info)
 		return -ENODEV;
 	} else {
 		/* debug slave */
-		exynos_dp_config_video_slave_mode(&edp_info->video_info);
+		exynos_dp_config_video_slave_mode(dp_regs,
+						  &edp_info->video_info);
 	}
 
-	exynos_dp_set_video_color_format(&edp_info->video_info);
+	exynos_dp_set_video_color_format(dp_regs, &edp_info->video_info);
 
 	if (edp_info->video_info.bist_mode) {
-		if (exynos_dp_config_video_bist(edp_info) != 0)
+		if (exynos_dp_config_video_bist(dp_regs, edp_info) != 0)
 			return -1;
 	}
 
-	ret = exynos_dp_get_pll_lock_status();
+	ret = exynos_dp_get_pll_lock_status(dp_regs);
 	if (ret != PLL_LOCKED) {
 		printf("DP PLL is not locked yet\n");
 		return -EIO;
@@ -794,7 +820,7 @@ static unsigned int exynos_dp_config_video(struct edp_device_info *edp_info)
 	if (edp_info->video_info.master_mode == 0) {
 		retry_cnt = 10;
 		while (retry_cnt) {
-			ret = exynos_dp_is_slave_video_stream_clock_on();
+			ret = exynos_dp_is_slave_video_stream_clock_on(dp_regs);
 			if (ret != EXYNOS_DP_SUCCESS) {
 				if (retry_cnt == 0) {
 					printf("DP stream_clock_on failed\n");
@@ -808,32 +834,34 @@ static unsigned int exynos_dp_config_video(struct edp_device_info *edp_info)
 	}
 
 	/* Set to use the register calculated M/N video */
-	exynos_dp_set_video_cr_mn(CALCULATED_M, 0, 0);
+	exynos_dp_set_video_cr_mn(dp_regs, CALCULATED_M, 0, 0);
 
 	/* For video bist, Video timing must be generated by register */
-	exynos_dp_set_video_timing_mode(VIDEO_TIMING_FROM_CAPTURE);
+	exynos_dp_set_video_timing_mode(dp_regs, VIDEO_TIMING_FROM_CAPTURE);
 
 	/* Enable video bist */
 	if (edp_info->video_info.bist_pattern != COLOR_RAMP &&
 		edp_info->video_info.bist_pattern != BALCK_WHITE_V_LINES &&
 		edp_info->video_info.bist_pattern != COLOR_SQUARE)
-		exynos_dp_enable_video_bist(edp_info->video_info.bist_mode);
+		exynos_dp_enable_video_bist(dp_regs,
+					    edp_info->video_info.bist_mode);
 	else
-		exynos_dp_enable_video_bist(DP_DISABLE);
+		exynos_dp_enable_video_bist(dp_regs, DP_DISABLE);
 
 	/* Disable video mute */
-	exynos_dp_enable_video_mute(DP_DISABLE);
+	exynos_dp_enable_video_mute(dp_regs, DP_DISABLE);
 
 	/* Configure video Master or Slave mode */
-	exynos_dp_enable_video_master(edp_info->video_info.master_mode);
+	exynos_dp_enable_video_master(dp_regs,
+				      edp_info->video_info.master_mode);
 
 	/* Enable video */
-	exynos_dp_start_video();
+	exynos_dp_start_video(dp_regs);
 
 	if (edp_info->video_info.master_mode == 0) {
 		retry_cnt = 100;
 		while (retry_cnt) {
-			ret = exynos_dp_is_video_stream_on();
+			ret = exynos_dp_is_video_stream_on(dp_regs);
 			if (ret != EXYNOS_DP_SUCCESS) {
 				if (retry_cnt == 0) {
 					printf("DP Timeout of video stream\n");
@@ -907,6 +935,8 @@ unsigned int exynos_init_dp(void)
 {
 	unsigned int ret;
 	struct edp_device_info *edp_info;
+	struct exynos_dp *dp_regs;
+	int node;
 
 	edp_info = kzalloc(sizeof(struct edp_device_info), GFP_KERNEL);
 	if (!edp_info) {
@@ -917,39 +947,47 @@ unsigned int exynos_init_dp(void)
 	if (exynos_dp_parse_dt(gd->fdt_blob, edp_info))
 		debug("unable to parse DP DT node\n");
 
-	exynos_dp_set_base_addr();
+	node = fdtdec_next_compatible(gd->fdt_blob, 0,
+				      COMPAT_SAMSUNG_EXYNOS5_DP);
+	if (node <= 0)
+		debug("exynos_dp: Can't get device node for dp\n");
+
+	dp_regs = (struct exynos_dp *)fdtdec_get_addr(gd->fdt_blob, node,
+						      "reg");
+	if (dp_regs == NULL)
+		debug("Can't get the DP base address\n");
 
 	exynos_dp_disp_info(&edp_info->disp_info);
 
 	exynos_set_dp_phy(1);
 
-	ret = exynos_dp_init_dp();
+	ret = exynos_dp_init_dp(dp_regs);
 	if (ret != EXYNOS_DP_SUCCESS) {
 		printf("DP exynos_dp_init_dp() failed\n");
 		return ret;
 	}
 
-	ret = exynos_dp_handle_edid(edp_info);
+	ret = exynos_dp_handle_edid(dp_regs, edp_info);
 	if (ret != EXYNOS_DP_SUCCESS) {
 		printf("EDP handle_edid fail\n");
 		return ret;
 	}
 
-	ret = exynos_dp_set_link_train(edp_info);
+	ret = exynos_dp_set_link_train(dp_regs, edp_info);
 	if (ret != EXYNOS_DP_SUCCESS) {
 		printf("DP link training fail\n");
 		return ret;
 	}
 
-	exynos_dp_enable_scramble(DP_ENABLE);
-	exynos_dp_enable_rx_to_enhanced_mode(DP_ENABLE);
-	exynos_dp_enable_enhanced_mode(DP_ENABLE);
+	exynos_dp_enable_scramble(dp_regs, DP_ENABLE);
+	exynos_dp_enable_rx_to_enhanced_mode(dp_regs, DP_ENABLE);
+	exynos_dp_enable_enhanced_mode(dp_regs, DP_ENABLE);
 
-	exynos_dp_set_link_bandwidth(edp_info->lane_bw);
-	exynos_dp_set_lane_count(edp_info->lane_cnt);
+	exynos_dp_set_link_bandwidth(dp_regs, edp_info->lane_bw);
+	exynos_dp_set_lane_count(dp_regs, edp_info->lane_cnt);
 
-	exynos_dp_init_video();
-	ret = exynos_dp_config_video(edp_info);
+	exynos_dp_init_video(dp_regs);
+	ret = exynos_dp_config_video(dp_regs, edp_info);
 	if (ret != EXYNOS_DP_SUCCESS) {
 		printf("Exynos DP init failed\n");
 		return ret;
diff --git a/drivers/video/exynos/exynos_dp_lowlevel.c b/drivers/video/exynos/exynos_dp_lowlevel.c
index e417cf86c6..153c1c6d42 100644
--- a/drivers/video/exynos/exynos_dp_lowlevel.c
+++ b/drivers/video/exynos/exynos_dp_lowlevel.c
@@ -14,26 +14,13 @@
 #include <asm/arch/dp.h>
 #include <fdtdec.h>
 #include <libfdt.h>
+#include "exynos_dp_lowlevel.h"
 
 /* Declare global data pointer */
 DECLARE_GLOBAL_DATA_PTR;
 
-struct exynos_dp *dp_regs;
-
-void exynos_dp_set_base_addr(void)
-{
-	unsigned int node = fdtdec_next_compatible(gd->fdt_blob,
-					0, COMPAT_SAMSUNG_EXYNOS5_DP);
-	if (node <= 0)
-		debug("exynos_dp: Can't get device node for dp\n");
-
-	dp_regs = (struct exynos_dp *)fdtdec_get_addr(gd->fdt_blob,
-								node, "reg");
-	if (dp_regs == NULL)
-		debug("Can't get the DP base address\n");
-}
-
-static void exynos_dp_enable_video_input(unsigned int enable)
+static void exynos_dp_enable_video_input(struct exynos_dp *dp_regs,
+					 unsigned int enable)
 {
 	unsigned int reg;
 
@@ -49,7 +36,7 @@ static void exynos_dp_enable_video_input(unsigned int enable)
 	return;
 }
 
-void exynos_dp_enable_video_bist(unsigned int enable)
+void exynos_dp_enable_video_bist(struct exynos_dp *dp_regs, unsigned int enable)
 {
 	/* enable video bist */
 	unsigned int reg;
@@ -66,7 +53,7 @@ void exynos_dp_enable_video_bist(unsigned int enable)
 	return;
 }
 
-void exynos_dp_enable_video_mute(unsigned int enable)
+void exynos_dp_enable_video_mute(struct exynos_dp *dp_regs, unsigned int enable)
 {
 	unsigned int reg;
 
@@ -81,7 +68,7 @@ void exynos_dp_enable_video_mute(unsigned int enable)
 }
 
 
-static void exynos_dp_init_analog_param(void)
+static void exynos_dp_init_analog_param(struct exynos_dp *dp_regs)
 {
 	unsigned int reg;
 
@@ -130,7 +117,7 @@ static void exynos_dp_init_analog_param(void)
 	writel(reg, &dp_regs->pll_ctl);
 }
 
-static void exynos_dp_init_interrupt(void)
+static void exynos_dp_init_interrupt(struct exynos_dp *dp_regs)
 {
 	/* Set interrupt registers to initial states */
 
@@ -157,16 +144,16 @@ static void exynos_dp_init_interrupt(void)
 	writel(0x00, &dp_regs->int_sta_mask);
 }
 
-void exynos_dp_reset(void)
+void exynos_dp_reset(struct exynos_dp *dp_regs)
 {
 	unsigned int reg_func_1;
 
 	/* dp tx sw reset */
 	writel(RESET_DP_TX, &dp_regs->tx_sw_reset);
 
-	exynos_dp_enable_video_input(DP_DISABLE);
-	exynos_dp_enable_video_bist(DP_DISABLE);
-	exynos_dp_enable_video_mute(DP_DISABLE);
+	exynos_dp_enable_video_input(dp_regs, DP_DISABLE);
+	exynos_dp_enable_video_bist(dp_regs, DP_DISABLE);
+	exynos_dp_enable_video_mute(dp_regs, DP_DISABLE);
 
 	/* software reset */
 	reg_func_1 = MASTER_VID_FUNC_EN_N | SLAVE_VID_FUNC_EN_N |
@@ -178,13 +165,13 @@ void exynos_dp_reset(void)
 
 	mdelay(1);
 
-	exynos_dp_init_analog_param();
-	exynos_dp_init_interrupt();
+	exynos_dp_init_analog_param(dp_regs);
+	exynos_dp_init_interrupt(dp_regs);
 
 	return;
 }
 
-void exynos_dp_enable_sw_func(unsigned int enable)
+void exynos_dp_enable_sw_func(struct exynos_dp *dp_regs, unsigned int enable)
 {
 	unsigned int reg;
 
@@ -199,7 +186,8 @@ void exynos_dp_enable_sw_func(unsigned int enable)
 	return;
 }
 
-unsigned int exynos_dp_set_analog_power_down(unsigned int block, u32 enable)
+unsigned int exynos_dp_set_analog_power_down(struct exynos_dp *dp_regs,
+					     unsigned int block, u32 enable)
 {
 	unsigned int reg;
 
@@ -252,7 +240,7 @@ unsigned int exynos_dp_set_analog_power_down(unsigned int block, u32 enable)
 	return 0;
 }
 
-unsigned int exynos_dp_get_pll_lock_status(void)
+unsigned int exynos_dp_get_pll_lock_status(struct exynos_dp *dp_regs)
 {
 	unsigned int reg;
 
@@ -264,7 +252,8 @@ unsigned int exynos_dp_get_pll_lock_status(void)
 		return PLL_UNLOCKED;
 }
 
-static void exynos_dp_set_pll_power(unsigned int enable)
+static void exynos_dp_set_pll_power(struct exynos_dp *dp_regs,
+				    unsigned int enable)
 {
 	unsigned int reg;
 
@@ -277,14 +266,14 @@ static void exynos_dp_set_pll_power(unsigned int enable)
 	writel(reg, &dp_regs->pll_ctl);
 }
 
-int exynos_dp_init_analog_func(void)
+int exynos_dp_init_analog_func(struct exynos_dp *dp_regs)
 {
 	int ret = EXYNOS_DP_SUCCESS;
 	unsigned int retry_cnt = 10;
 	unsigned int reg;
 
 	/* Power On All Analog block */
-	exynos_dp_set_analog_power_down(POWER_ALL, DP_DISABLE);
+	exynos_dp_set_analog_power_down(dp_regs, POWER_ALL, DP_DISABLE);
 
 	reg = PLL_LOCK_CHG;
 	writel(reg, &dp_regs->common_int_sta1);
@@ -305,9 +294,9 @@ int exynos_dp_init_analog_func(void)
 	reg &= ~(DP_PLL_RESET);
 	writel(reg, &dp_regs->pll_ctl);
 
-	exynos_dp_set_pll_power(DP_ENABLE);
+	exynos_dp_set_pll_power(dp_regs, DP_ENABLE);
 
-	while (exynos_dp_get_pll_lock_status() == PLL_UNLOCKED) {
+	while (exynos_dp_get_pll_lock_status(dp_regs) == PLL_UNLOCKED) {
 		mdelay(1);
 		retry_cnt--;
 		if (retry_cnt == 0) {
@@ -328,7 +317,7 @@ int exynos_dp_init_analog_func(void)
 	return ret;
 }
 
-void exynos_dp_init_hpd(void)
+void exynos_dp_init_hpd(struct exynos_dp *dp_regs)
 {
 	unsigned int reg;
 
@@ -346,7 +335,7 @@ void exynos_dp_init_hpd(void)
 	return;
 }
 
-static inline void exynos_dp_reset_aux(void)
+static inline void exynos_dp_reset_aux(struct exynos_dp *dp_regs)
 {
 	unsigned int reg;
 
@@ -358,7 +347,7 @@ static inline void exynos_dp_reset_aux(void)
 	return;
 }
 
-void exynos_dp_init_aux(void)
+void exynos_dp_init_aux(struct exynos_dp *dp_regs)
 {
 	unsigned int reg;
 
@@ -366,7 +355,7 @@ void exynos_dp_init_aux(void)
 	reg = RPLY_RECEIV | AUX_ERR;
 	writel(reg, &dp_regs->int_sta);
 
-	exynos_dp_reset_aux();
+	exynos_dp_reset_aux(dp_regs);
 
 	/* Disable AUX transaction H/W retry */
 	reg = AUX_BIT_PERIOD_EXPECTED_DELAY(3) | AUX_HW_RETRY_COUNT_SEL(3)|
@@ -385,7 +374,7 @@ void exynos_dp_init_aux(void)
 	return;
 }
 
-void exynos_dp_config_interrupt(void)
+void exynos_dp_config_interrupt(struct exynos_dp *dp_regs)
 {
 	unsigned int reg;
 
@@ -408,7 +397,7 @@ void exynos_dp_config_interrupt(void)
 	return;
 }
 
-unsigned int exynos_dp_get_plug_in_status(void)
+unsigned int exynos_dp_get_plug_in_status(struct exynos_dp *dp_regs)
 {
 	unsigned int reg;
 
@@ -419,13 +408,13 @@ unsigned int exynos_dp_get_plug_in_status(void)
 	return -1;
 }
 
-unsigned int exynos_dp_detect_hpd(void)
+unsigned int exynos_dp_detect_hpd(struct exynos_dp *dp_regs)
 {
 	int timeout_loop = DP_TIMEOUT_LOOP_COUNT;
 
 	mdelay(2);
 
-	while (exynos_dp_get_plug_in_status() != 0) {
+	while (exynos_dp_get_plug_in_status(dp_regs) != 0) {
 		if (timeout_loop == 0)
 			return -EINVAL;
 		mdelay(10);
@@ -435,7 +424,7 @@ unsigned int exynos_dp_detect_hpd(void)
 	return EXYNOS_DP_SUCCESS;
 }
 
-unsigned int exynos_dp_start_aux_transaction(void)
+unsigned int exynos_dp_start_aux_transaction(struct exynos_dp *dp_regs)
 {
 	unsigned int reg;
 	unsigned int ret = 0;
@@ -484,8 +473,9 @@ unsigned int exynos_dp_start_aux_transaction(void)
 	return EXYNOS_DP_SUCCESS;
 }
 
-unsigned int exynos_dp_write_byte_to_dpcd(unsigned int reg_addr,
-				unsigned char data)
+unsigned int exynos_dp_write_byte_to_dpcd(struct exynos_dp *dp_regs,
+					  unsigned int reg_addr,
+					  unsigned char data)
 {
 	unsigned int reg, ret;
 
@@ -514,7 +504,7 @@ unsigned int exynos_dp_write_byte_to_dpcd(unsigned int reg_addr,
 	writel(reg, &dp_regs->aux_ch_ctl1);
 
 	/* Start AUX transaction */
-	ret = exynos_dp_start_aux_transaction();
+	ret = exynos_dp_start_aux_transaction(dp_regs);
 	if (ret != EXYNOS_DP_SUCCESS) {
 		printf("DP Aux transaction failed\n");
 		return ret;
@@ -523,8 +513,9 @@ unsigned int exynos_dp_write_byte_to_dpcd(unsigned int reg_addr,
 	return ret;
 }
 
-unsigned int exynos_dp_read_byte_from_dpcd(unsigned int reg_addr,
-		unsigned char *data)
+unsigned int exynos_dp_read_byte_from_dpcd(struct exynos_dp *dp_regs,
+					   unsigned int reg_addr,
+					   unsigned char *data)
 {
 	unsigned int reg;
 	int retval;
@@ -550,7 +541,7 @@ unsigned int exynos_dp_read_byte_from_dpcd(unsigned int reg_addr,
 	writel(reg, &dp_regs->aux_ch_ctl1);
 
 	/* Start AUX transaction */
-	retval = exynos_dp_start_aux_transaction();
+	retval = exynos_dp_start_aux_transaction(dp_regs);
 	if (!retval)
 		debug("DP Aux Transaction fail!\n");
 
@@ -561,9 +552,10 @@ unsigned int exynos_dp_read_byte_from_dpcd(unsigned int reg_addr,
 	return retval;
 }
 
-unsigned int exynos_dp_write_bytes_to_dpcd(unsigned int reg_addr,
-				unsigned int count,
-				unsigned char data[])
+unsigned int exynos_dp_write_bytes_to_dpcd(struct exynos_dp *dp_regs,
+					   unsigned int reg_addr,
+					   unsigned int count,
+					   unsigned char data[])
 {
 	unsigned int reg;
 	unsigned int start_offset;
@@ -610,7 +602,7 @@ unsigned int exynos_dp_write_bytes_to_dpcd(unsigned int reg_addr,
 			writel(reg, &dp_regs->aux_ch_ctl1);
 
 			/* Start AUX transaction */
-			ret = exynos_dp_start_aux_transaction();
+			ret = exynos_dp_start_aux_transaction(dp_regs);
 			if (ret != EXYNOS_DP_SUCCESS) {
 				if (retry_cnt == 0) {
 					printf("DP Aux Transaction failed\n");
@@ -626,9 +618,10 @@ unsigned int exynos_dp_write_bytes_to_dpcd(unsigned int reg_addr,
 	return ret;
 }
 
-unsigned int exynos_dp_read_bytes_from_dpcd(unsigned int reg_addr,
-				unsigned int count,
-				unsigned char data[])
+unsigned int exynos_dp_read_bytes_from_dpcd(struct exynos_dp *dp_regs,
+					    unsigned int reg_addr,
+					    unsigned int count,
+					    unsigned char data[])
 {
 	unsigned int reg;
 	unsigned int start_offset;
@@ -668,7 +661,7 @@ unsigned int exynos_dp_read_bytes_from_dpcd(unsigned int reg_addr,
 			writel(reg, &dp_regs->aux_ch_ctl1);
 
 			/* Start AUX transaction */
-			ret = exynos_dp_start_aux_transaction();
+			ret = exynos_dp_start_aux_transaction(dp_regs);
 			if (ret != EXYNOS_DP_SUCCESS) {
 				if (retry_cnt == 0) {
 					printf("DP Aux Transaction failed\n");
@@ -692,8 +685,8 @@ unsigned int exynos_dp_read_bytes_from_dpcd(unsigned int reg_addr,
 	return ret;
 }
 
-int exynos_dp_select_i2c_device(unsigned int device_addr,
-				unsigned int reg_addr)
+int exynos_dp_select_i2c_device(struct exynos_dp *dp_regs,
+				unsigned int device_addr, unsigned int reg_addr)
 {
 	unsigned int reg;
 	int retval;
@@ -717,16 +710,16 @@ int exynos_dp_select_i2c_device(unsigned int device_addr,
 	writel(reg, &dp_regs->aux_ch_ctl1);
 
 	/* Start AUX transaction */
-	retval = exynos_dp_start_aux_transaction();
+	retval = exynos_dp_start_aux_transaction(dp_regs);
 	if (retval != 0)
 		printf("%s: DP Aux Transaction fail!\n", __func__);
 
 	return retval;
 }
 
-int exynos_dp_read_byte_from_i2c(unsigned int device_addr,
-				unsigned int reg_addr,
-				unsigned int *data)
+int exynos_dp_read_byte_from_i2c(struct exynos_dp *dp_regs,
+				 unsigned int device_addr,
+				 unsigned int reg_addr, unsigned int *data)
 {
 	unsigned int reg;
 	int i;
@@ -738,7 +731,8 @@ int exynos_dp_read_byte_from_i2c(unsigned int device_addr,
 		writel(reg, &dp_regs->buffer_data_ctl);
 
 		/* Select EDID device */
-		retval = exynos_dp_select_i2c_device(device_addr, reg_addr);
+		retval = exynos_dp_select_i2c_device(dp_regs, device_addr,
+						     reg_addr);
 		if (retval != 0) {
 			printf("DP Select EDID device fail. retry !\n");
 			continue;
@@ -754,7 +748,7 @@ int exynos_dp_read_byte_from_i2c(unsigned int device_addr,
 		writel(reg, &dp_regs->aux_ch_ctl1);
 
 		/* Start AUX transaction */
-		retval = exynos_dp_start_aux_transaction();
+		retval = exynos_dp_start_aux_transaction(dp_regs);
 		if (retval != EXYNOS_DP_SUCCESS)
 			printf("%s: DP Aux Transaction fail!\n", __func__);
 	}
@@ -766,8 +760,10 @@ int exynos_dp_read_byte_from_i2c(unsigned int device_addr,
 	return retval;
 }
 
-int exynos_dp_read_bytes_from_i2c(unsigned int device_addr,
-		unsigned int reg_addr, unsigned int count, unsigned char edid[])
+int exynos_dp_read_bytes_from_i2c(struct exynos_dp *dp_regs,
+				  unsigned int device_addr,
+				  unsigned int reg_addr, unsigned int count,
+				  unsigned char edid[])
 {
 	unsigned int reg;
 	unsigned int i, j;
@@ -791,9 +787,8 @@ int exynos_dp_read_bytes_from_i2c(unsigned int device_addr,
 			 * request without sending addres
 			 */
 			if (!defer)
-				retval =
-					exynos_dp_select_i2c_device(device_addr,
-							reg_addr + i);
+				retval = exynos_dp_select_i2c_device(
+					dp_regs, device_addr, reg_addr + i);
 			else
 				defer = 0;
 
@@ -809,7 +804,8 @@ int exynos_dp_read_bytes_from_i2c(unsigned int device_addr,
 				writel(reg, &dp_regs->aux_ch_ctl1);
 
 				/* Start AUX transaction */
-				retval = exynos_dp_start_aux_transaction();
+				retval = exynos_dp_start_aux_transaction(
+							dp_regs);
 				if (retval == 0)
 					break;
 				else
@@ -834,7 +830,7 @@ int exynos_dp_read_bytes_from_i2c(unsigned int device_addr,
 	return retval;
 }
 
-void exynos_dp_reset_macro(void)
+void exynos_dp_reset_macro(struct exynos_dp *dp_regs)
 {
 	unsigned int reg;
 
@@ -849,7 +845,8 @@ void exynos_dp_reset_macro(void)
 	writel(reg, &dp_regs->phy_test);
 }
 
-void exynos_dp_set_link_bandwidth(unsigned char bwtype)
+void exynos_dp_set_link_bandwidth(struct exynos_dp *dp_regs,
+				  unsigned char bwtype)
 {
 	unsigned int reg;
 
@@ -860,7 +857,7 @@ void exynos_dp_set_link_bandwidth(unsigned char bwtype)
 		writel(reg, &dp_regs->link_bw_set);
 }
 
-unsigned char exynos_dp_get_link_bandwidth(void)
+unsigned char exynos_dp_get_link_bandwidth(struct exynos_dp *dp_regs)
 {
 	unsigned char ret;
 	unsigned int reg;
@@ -871,7 +868,7 @@ unsigned char exynos_dp_get_link_bandwidth(void)
 	return ret;
 }
 
-void exynos_dp_set_lane_count(unsigned char count)
+void exynos_dp_set_lane_count(struct exynos_dp *dp_regs, unsigned char count)
 {
 	unsigned int reg;
 
@@ -882,7 +879,7 @@ void exynos_dp_set_lane_count(unsigned char count)
 		writel(reg, &dp_regs->lane_count_set);
 }
 
-unsigned int exynos_dp_get_lane_count(void)
+unsigned int exynos_dp_get_lane_count(struct exynos_dp *dp_regs)
 {
 	unsigned int reg;
 
@@ -891,7 +888,8 @@ unsigned int exynos_dp_get_lane_count(void)
 	return reg;
 }
 
-unsigned char exynos_dp_get_lanex_pre_emphasis(unsigned char lanecnt)
+unsigned char exynos_dp_get_lanex_pre_emphasis(struct exynos_dp *dp_regs,
+					       unsigned char lanecnt)
 {
 	unsigned int reg_list[DP_LANE_CNT_4] = {
 		(unsigned int)&dp_regs->ln0_link_training_ctl,
@@ -903,8 +901,9 @@ unsigned char exynos_dp_get_lanex_pre_emphasis(unsigned char lanecnt)
 	return readl(reg_list[lanecnt]);
 }
 
-void exynos_dp_set_lanex_pre_emphasis(unsigned char request_val,
-		unsigned char lanecnt)
+void exynos_dp_set_lanex_pre_emphasis(struct exynos_dp *dp_regs,
+				      unsigned char request_val,
+				      unsigned char lanecnt)
 {
 	unsigned int reg_list[DP_LANE_CNT_4] = {
 		(unsigned int)&dp_regs->ln0_link_training_ctl,
@@ -916,7 +915,8 @@ void exynos_dp_set_lanex_pre_emphasis(unsigned char request_val,
 	writel(request_val, reg_list[lanecnt]);
 }
 
-void exynos_dp_set_lane_pre_emphasis(unsigned int level, unsigned char lanecnt)
+void exynos_dp_set_lane_pre_emphasis(struct exynos_dp *dp_regs,
+				     unsigned int level, unsigned char lanecnt)
 {
 	unsigned char i;
 	unsigned int reg;
@@ -939,7 +939,8 @@ void exynos_dp_set_lane_pre_emphasis(unsigned int level, unsigned char lanecnt)
 	}
 }
 
-void exynos_dp_set_training_pattern(unsigned int pattern)
+void exynos_dp_set_training_pattern(struct exynos_dp *dp_regs,
+				    unsigned int pattern)
 {
 	unsigned int reg = 0;
 
@@ -967,7 +968,8 @@ void exynos_dp_set_training_pattern(unsigned int pattern)
 	writel(reg, &dp_regs->training_ptn_set);
 }
 
-void exynos_dp_enable_enhanced_mode(unsigned char enable)
+void exynos_dp_enable_enhanced_mode(struct exynos_dp *dp_regs,
+				    unsigned char enable)
 {
 	unsigned int reg;
 
@@ -980,7 +982,7 @@ void exynos_dp_enable_enhanced_mode(unsigned char enable)
 	writel(reg, &dp_regs->sys_ctl4);
 }
 
-void exynos_dp_enable_scrambling(unsigned int enable)
+void exynos_dp_enable_scrambling(struct exynos_dp *dp_regs, unsigned int enable)
 {
 	unsigned int reg;
 
@@ -993,7 +995,7 @@ void exynos_dp_enable_scrambling(unsigned int enable)
 	writel(reg, &dp_regs->training_ptn_set);
 }
 
-int exynos_dp_init_video(void)
+int exynos_dp_init_video(struct exynos_dp *dp_regs)
 {
 	unsigned int reg;
 
@@ -1008,7 +1010,8 @@ int exynos_dp_init_video(void)
 	return 0;
 }
 
-void exynos_dp_config_video_slave_mode(struct edp_video_info *video_info)
+void exynos_dp_config_video_slave_mode(struct exynos_dp *dp_regs,
+				       struct edp_video_info *video_info)
 {
 	unsigned int reg;
 
@@ -1041,7 +1044,8 @@ void exynos_dp_config_video_slave_mode(struct edp_video_info *video_info)
 	writel(reg, &dp_regs->soc_general_ctl);
 }
 
-void exynos_dp_set_video_color_format(struct edp_video_info *video_info)
+void exynos_dp_set_video_color_format(struct exynos_dp *dp_regs,
+				      struct edp_video_info *video_info)
 {
 	unsigned int reg;
 
@@ -1061,7 +1065,8 @@ void exynos_dp_set_video_color_format(struct edp_video_info *video_info)
 	writel(reg, &dp_regs->video_ctl3);
 }
 
-int exynos_dp_config_video_bist(struct edp_device_info *edp_info)
+int exynos_dp_config_video_bist(struct exynos_dp *dp_regs,
+				struct edp_device_info *edp_info)
 {
 	unsigned int reg;
 	unsigned int bist_type = 0;
@@ -1151,7 +1156,7 @@ int exynos_dp_config_video_bist(struct edp_device_info *edp_info)
 	return 0;
 }
 
-unsigned int exynos_dp_is_slave_video_stream_clock_on(void)
+unsigned int exynos_dp_is_slave_video_stream_clock_on(struct exynos_dp *dp_regs)
 {
 	unsigned int reg;
 
@@ -1169,8 +1174,8 @@ unsigned int exynos_dp_is_slave_video_stream_clock_on(void)
 	return EXYNOS_DP_SUCCESS;
 }
 
-void exynos_dp_set_video_cr_mn(unsigned int type, unsigned int m_value,
-		unsigned int n_value)
+void exynos_dp_set_video_cr_mn(struct exynos_dp *dp_regs, unsigned int type,
+			       unsigned int m_value, unsigned int n_value)
 {
 	unsigned int reg;
 
@@ -1198,7 +1203,8 @@ void exynos_dp_set_video_cr_mn(unsigned int type, unsigned int m_value,
 	}
 }
 
-void exynos_dp_set_video_timing_mode(unsigned int type)
+void exynos_dp_set_video_timing_mode(struct exynos_dp *dp_regs,
+				     unsigned int type)
 {
 	unsigned int reg;
 
@@ -1211,7 +1217,8 @@ void exynos_dp_set_video_timing_mode(unsigned int type)
 	writel(reg, &dp_regs->video_ctl10);
 }
 
-void exynos_dp_enable_video_master(unsigned int enable)
+void exynos_dp_enable_video_master(struct exynos_dp *dp_regs,
+				   unsigned int enable)
 {
 	unsigned int reg;
 
@@ -1227,7 +1234,7 @@ void exynos_dp_enable_video_master(unsigned int enable)
 	writel(reg, &dp_regs->soc_general_ctl);
 }
 
-void exynos_dp_start_video(void)
+void exynos_dp_start_video(struct exynos_dp *dp_regs)
 {
 	unsigned int reg;
 
@@ -1237,7 +1244,7 @@ void exynos_dp_start_video(void)
 	writel(reg, &dp_regs->video_ctl1);
 }
 
-unsigned int exynos_dp_is_video_stream_on(void)
+unsigned int exynos_dp_is_video_stream_on(struct exynos_dp *dp_regs)
 {
 	unsigned int reg;
 
diff --git a/drivers/video/exynos/exynos_dp_lowlevel.h b/drivers/video/exynos/exynos_dp_lowlevel.h
index 8651681520..85459b5386 100644
--- a/drivers/video/exynos/exynos_dp_lowlevel.h
+++ b/drivers/video/exynos/exynos_dp_lowlevel.h
@@ -9,60 +9,81 @@
 #ifndef _EXYNOS_EDP_LOWLEVEL_H
 #define _EXYNOS_EDP_LOWLEVEL_H
 
-void exynos_dp_enable_video_bist(unsigned int enable);
-void exynos_dp_enable_video_mute(unsigned int enable);
-void exynos_dp_reset(void);
-void exynos_dp_enable_sw_func(unsigned int enable);
-unsigned int exynos_dp_set_analog_power_down(unsigned int block, u32 enable);
-unsigned int exynos_dp_get_pll_lock_status(void);
-int exynos_dp_init_analog_func(void);
-void exynos_dp_init_hpd(void);
-void exynos_dp_init_aux(void);
-void exynos_dp_config_interrupt(void);
-unsigned int exynos_dp_get_plug_in_status(void);
-unsigned int exynos_dp_detect_hpd(void);
-unsigned int exynos_dp_start_aux_transaction(void);
-unsigned int exynos_dp_write_byte_to_dpcd(unsigned int reg_addr,
-				unsigned char data);
-unsigned int exynos_dp_read_byte_from_dpcd(unsigned int reg_addr,
-		unsigned char *data);
-unsigned int exynos_dp_write_bytes_to_dpcd(unsigned int reg_addr,
-		unsigned int count,
-		unsigned char data[]);
-unsigned int exynos_dp_read_bytes_from_dpcd( unsigned int reg_addr,
-		unsigned int count,
-		unsigned char data[]);
-int exynos_dp_select_i2c_device( unsigned int device_addr,
-		unsigned int reg_addr);
-int exynos_dp_read_byte_from_i2c(unsigned int device_addr,
-		unsigned int reg_addr, unsigned int *data);
-int exynos_dp_read_bytes_from_i2c(unsigned int device_addr,
-		unsigned int reg_addr, unsigned int count,
-		unsigned char edid[]);
-void exynos_dp_reset_macro(void);
-void exynos_dp_set_link_bandwidth(unsigned char bwtype);
-unsigned char exynos_dp_get_link_bandwidth(void);
-void exynos_dp_set_lane_count(unsigned char count);
-unsigned int exynos_dp_get_lane_count(void);
-unsigned char exynos_dp_get_lanex_pre_emphasis(unsigned char lanecnt);
-void exynos_dp_set_lane_pre_emphasis(unsigned int level,
-		unsigned char lanecnt);
-void exynos_dp_set_lanex_pre_emphasis(unsigned char request_val,
-		unsigned char lanecnt);
-void exynos_dp_set_training_pattern(unsigned int pattern);
-void exynos_dp_enable_enhanced_mode(unsigned char enable);
-void exynos_dp_enable_scrambling(unsigned int enable);
-int exynos_dp_init_video(void);
-void exynos_dp_config_video_slave_mode(struct edp_video_info *video_info);
-void exynos_dp_set_video_color_format(struct edp_video_info *video_info);
-int exynos_dp_config_video_bist(struct edp_device_info *edp_info);
-unsigned int exynos_dp_is_slave_video_stream_clock_on(void);
-void exynos_dp_set_video_cr_mn(unsigned int type, unsigned int m_value,
-		unsigned int n_value);
-void exynos_dp_set_video_timing_mode(unsigned int type);
-void exynos_dp_enable_video_master(unsigned int enable);
-void exynos_dp_start_video(void);
-unsigned int exynos_dp_is_video_stream_on(void);
-void exynos_dp_set_base_addr(void);
+void exynos_dp_enable_video_bist(struct exynos_dp *dp_regs,
+				 unsigned int enable);
+void exynos_dp_enable_video_mute(struct exynos_dp *dp_regs,
+				 unsigned int enable);
+void exynos_dp_reset(struct exynos_dp *dp_regs);
+void exynos_dp_enable_sw_func(struct exynos_dp *dp_regs, unsigned int enable);
+unsigned int exynos_dp_set_analog_power_down(struct exynos_dp *dp_regs,
+					     unsigned int block, u32 enable);
+unsigned int exynos_dp_get_pll_lock_status(struct exynos_dp *dp_regs);
+int exynos_dp_init_analog_func(struct exynos_dp *dp_regs);
+void exynos_dp_init_hpd(struct exynos_dp *dp_regs);
+void exynos_dp_init_aux(struct exynos_dp *dp_regs);
+void exynos_dp_config_interrupt(struct exynos_dp *dp_regs);
+unsigned int exynos_dp_get_plug_in_status(struct exynos_dp *dp_regs);
+unsigned int exynos_dp_detect_hpd(struct exynos_dp *dp_regs);
+unsigned int exynos_dp_start_aux_transaction(struct exynos_dp *dp_regs);
+unsigned int exynos_dp_write_byte_to_dpcd(struct exynos_dp *dp_regs,
+					  unsigned int reg_addr,
+					  unsigned char data);
+unsigned int exynos_dp_read_byte_from_dpcd(struct exynos_dp *dp_regs,
+					   unsigned int reg_addr,
+					   unsigned char *data);
+unsigned int exynos_dp_write_bytes_to_dpcd(struct exynos_dp *dp_regs,
+					   unsigned int reg_addr,
+					   unsigned int count,
+					   unsigned char data[]);
+unsigned int exynos_dp_read_bytes_from_dpcd(struct exynos_dp *dp_regs,
+					    unsigned int reg_addr,
+					    unsigned int count,
+					    unsigned char data[]);
+int exynos_dp_select_i2c_device(struct exynos_dp *dp_regs,
+				unsigned int device_addr,
+				unsigned int reg_addr);
+int exynos_dp_read_byte_from_i2c(struct exynos_dp *dp_regs,
+				 unsigned int device_addr,
+				 unsigned int reg_addr, unsigned int *data);
+int exynos_dp_read_bytes_from_i2c(struct exynos_dp *dp_regs,
+				  unsigned int device_addr,
+				  unsigned int reg_addr, unsigned int count,
+				  unsigned char edid[]);
+void exynos_dp_reset_macro(struct exynos_dp *dp_regs);
+void exynos_dp_set_link_bandwidth(struct exynos_dp *dp_regs,
+				  unsigned char bwtype);
+unsigned char exynos_dp_get_link_bandwidth(struct exynos_dp *dp_regs);
+void exynos_dp_set_lane_count(struct exynos_dp *dp_regs, unsigned char count);
+unsigned int exynos_dp_get_lane_count(struct exynos_dp *dp_regs);
+unsigned char exynos_dp_get_lanex_pre_emphasis(struct exynos_dp *dp_regs,
+					       unsigned char lanecnt);
+void exynos_dp_set_lane_pre_emphasis(struct exynos_dp *dp_regs,
+				     unsigned int level, unsigned char lanecnt);
+void exynos_dp_set_lanex_pre_emphasis(struct exynos_dp *dp_regs,
+				      unsigned char request_val,
+				      unsigned char lanecnt);
+void exynos_dp_set_training_pattern(struct exynos_dp *dp_regs,
+				    unsigned int pattern);
+void exynos_dp_enable_enhanced_mode(struct exynos_dp *dp_regs,
+				    unsigned char enable);
+void exynos_dp_enable_scrambling(struct exynos_dp *dp_regs,
+				 unsigned int enable);
+int exynos_dp_init_video(struct exynos_dp *dp_regs);
+void exynos_dp_config_video_slave_mode(struct exynos_dp *dp_regs,
+				       struct edp_video_info *video_info);
+void exynos_dp_set_video_color_format(struct exynos_dp *dp_regs,
+				      struct edp_video_info *video_info);
+int exynos_dp_config_video_bist(struct exynos_dp *dp_regs,
+				struct edp_device_info *edp_info);
+unsigned int exynos_dp_is_slave_video_stream_clock_on(
+					struct exynos_dp *dp_regs);
+void exynos_dp_set_video_cr_mn(struct exynos_dp *dp_regs, unsigned int type,
+			       unsigned int m_value, unsigned int n_value);
+void exynos_dp_set_video_timing_mode(struct exynos_dp *dp_regs,
+				     unsigned int type);
+void exynos_dp_enable_video_master(struct exynos_dp *dp_regs,
+				   unsigned int enable);
+void exynos_dp_start_video(struct exynos_dp *dp_regs);
+unsigned int exynos_dp_is_video_stream_on(struct exynos_dp *dp_regs);
 
 #endif /* _EXYNOS_DP_LOWLEVEL_H */