Adding upstream version 6.6.15.upstream/6.6.15

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

58 files changed, 19527 insertions, 0 deletions

diff --git a/drivers/gpu/drm/amd/display/dc/link/Makefile b/drivers/gpu/drm/amd/display/dc/link/Makefile
new file mode 100644
index 000000000..6af8a97d4
--- /dev/null
+++ b/drivers/gpu/drm/amd/display/dc/link/Makefile
@@ -0,0 +1,64 @@
+#
+# Copyright 2022 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.
+#
+# Makefile for the link sub-component of DAL.
+# It abstracts the control and status of back end pipe such as DIO, HPO, DPIA,
+# PHY, HPD, DDC and etc).
+
+LINK = link_detection.o link_dpms.o link_factory.o link_resource.o \
+link_validation.o
+
+AMD_DAL_LINK = $(addprefix $(AMDDALPATH)/dc/link/, \
+$(LINK))
+
+AMD_DISPLAY_FILES += $(AMD_DAL_LINK)
+###############################################################################
+# accessories
+###############################################################################
+LINK_ACCESSORIES = link_dp_trace.o link_dp_cts.o link_fpga.o
+
+AMD_DAL_LINK_ACCESSORIES = $(addprefix $(AMDDALPATH)/dc/link/accessories/, \
+$(LINK_ACCESSORIES))
+
+AMD_DISPLAY_FILES += $(AMD_DAL_LINK_ACCESSORIES)
+###############################################################################
+# hwss
+###############################################################################
+LINK_HWSS = link_hwss_dio.o link_hwss_dpia.o link_hwss_hpo_dp.o \
+link_hwss_dio_fixed_vs_pe_retimer.o link_hwss_hpo_fixed_vs_pe_retimer_dp.o
+
+AMD_DAL_LINK_HWSS = $(addprefix $(AMDDALPATH)/dc/link/hwss/, \
+$(LINK_HWSS))
+
+AMD_DISPLAY_FILES += $(AMD_DAL_LINK_HWSS)
+###############################################################################
+# protocols
+###############################################################################
+LINK_PROTOCOLS = link_hpd.o link_ddc.o link_dpcd.o link_dp_dpia.o \
+link_dp_training.o link_dp_training_8b_10b.o link_dp_training_128b_132b.o \
+link_dp_training_dpia.o link_dp_training_auxless.o \
+link_dp_training_fixed_vs_pe_retimer.o link_dp_phy.o link_dp_capability.o \
+link_edp_panel_control.o link_dp_irq_handler.o link_dp_dpia_bw.o
+
+AMD_DAL_LINK_PROTOCOLS = $(addprefix $(AMDDALPATH)/dc/link/protocols/, \
+$(LINK_PROTOCOLS))
+
+AMD_DISPLAY_FILES += $(AMD_DAL_LINK_PROTOCOLS)
\ No newline at end of file
diff --git a/drivers/gpu/drm/amd/display/dc/link/accessories/link_dp_cts.c b/drivers/gpu/drm/amd/display/dc/link/accessories/link_dp_cts.c
new file mode 100644
index 000000000..fe4282771
--- /dev/null
+++ b/drivers/gpu/drm/amd/display/dc/link/accessories/link_dp_cts.c
@@ -0,0 +1,1016 @@
+/*
+ * Copyright 2022 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 "link_dp_cts.h"
+#include "link/link_resource.h"
+#include "link/protocols/link_dpcd.h"
+#include "link/protocols/link_dp_training.h"
+#include "link/protocols/link_dp_phy.h"
+#include "link/protocols/link_dp_training_fixed_vs_pe_retimer.h"
+#include "link/protocols/link_dp_capability.h"
+#include "link/link_dpms.h"
+#include "resource.h"
+#include "dm_helpers.h"
+#include "dc_dmub_srv.h"
+#include "dce/dmub_hw_lock_mgr.h"
+
+#define DC_LOGGER \
+	link->ctx->logger
+
+static enum dc_link_rate get_link_rate_from_test_link_rate(uint8_t test_rate)
+{
+	switch (test_rate) {
+	case DP_TEST_LINK_RATE_RBR:
+		return LINK_RATE_LOW;
+	case DP_TEST_LINK_RATE_HBR:
+		return LINK_RATE_HIGH;
+	case DP_TEST_LINK_RATE_HBR2:
+		return LINK_RATE_HIGH2;
+	case DP_TEST_LINK_RATE_HBR3:
+		return LINK_RATE_HIGH3;
+	case DP_TEST_LINK_RATE_UHBR10:
+		return LINK_RATE_UHBR10;
+	case DP_TEST_LINK_RATE_UHBR20:
+		return LINK_RATE_UHBR20;
+	case DP_TEST_LINK_RATE_UHBR13_5:
+		return LINK_RATE_UHBR13_5;
+	default:
+		return LINK_RATE_UNKNOWN;
+	}
+}
+
+static bool is_dp_phy_sqaure_pattern(enum dp_test_pattern test_pattern)
+{
+	return (DP_TEST_PATTERN_SQUARE_BEGIN <= test_pattern &&
+			test_pattern <= DP_TEST_PATTERN_SQUARE_END);
+}
+
+static bool is_dp_phy_pattern(enum dp_test_pattern test_pattern)
+{
+	if ((DP_TEST_PATTERN_PHY_PATTERN_BEGIN <= test_pattern &&
+			test_pattern <= DP_TEST_PATTERN_PHY_PATTERN_END) ||
+			test_pattern == DP_TEST_PATTERN_VIDEO_MODE)
+		return true;
+	else
+		return false;
+}
+
+static void dp_retrain_link_dp_test(struct dc_link *link,
+			struct dc_link_settings *link_setting,
+			bool skip_video_pattern)
+{
+	struct pipe_ctx *pipes[MAX_PIPES];
+	struct dc_state *state = link->dc->current_state;
+	uint8_t count;
+	int i;
+
+	udelay(100);
+
+	link_get_master_pipes_with_dpms_on(link, state, &count, pipes);
+
+	for (i = 0; i < count; i++) {
+		link_set_dpms_off(pipes[i]);
+		pipes[i]->link_config.dp_link_settings = *link_setting;
+		update_dp_encoder_resources_for_test_harness(
+				link->dc,
+				state,
+				pipes[i]);
+	}
+
+	for (i = count-1; i >= 0; i--)
+		link_set_dpms_on(state, pipes[i]);
+}
+
+static void dp_test_send_link_training(struct dc_link *link)
+{
+	struct dc_link_settings link_settings = {0};
+	uint8_t test_rate = 0;
+
+	core_link_read_dpcd(
+			link,
+			DP_TEST_LANE_COUNT,
+			(unsigned char *)(&link_settings.lane_count),
+			1);
+	core_link_read_dpcd(
+			link,
+			DP_TEST_LINK_RATE,
+			&test_rate,
+			1);
+	link_settings.link_rate = get_link_rate_from_test_link_rate(test_rate);
+
+	/* Set preferred link settings */
+	link->verified_link_cap.lane_count = link_settings.lane_count;
+	link->verified_link_cap.link_rate = link_settings.link_rate;
+
+	dp_retrain_link_dp_test(link, &link_settings, false);
+}
+
+static void dp_test_get_audio_test_data(struct dc_link *link, bool disable_video)
+{
+	union audio_test_mode            dpcd_test_mode = {0};
+	struct audio_test_pattern_type   dpcd_pattern_type = {0};
+	union audio_test_pattern_period  dpcd_pattern_period[AUDIO_CHANNELS_COUNT] = {0};
+	enum dp_test_pattern test_pattern = DP_TEST_PATTERN_AUDIO_OPERATOR_DEFINED;
+
+	struct pipe_ctx *pipes = link->dc->current_state->res_ctx.pipe_ctx;
+	struct pipe_ctx *pipe_ctx = &pipes[0];
+	unsigned int channel_count;
+	unsigned int channel = 0;
+	unsigned int modes = 0;
+	unsigned int sampling_rate_in_hz = 0;
+
+	// get audio test mode and test pattern parameters
+	core_link_read_dpcd(
+		link,
+		DP_TEST_AUDIO_MODE,
+		&dpcd_test_mode.raw,
+		sizeof(dpcd_test_mode));
+
+	core_link_read_dpcd(
+		link,
+		DP_TEST_AUDIO_PATTERN_TYPE,
+		&dpcd_pattern_type.value,
+		sizeof(dpcd_pattern_type));
+
+	channel_count = min(dpcd_test_mode.bits.channel_count + 1, AUDIO_CHANNELS_COUNT);
+
+	// read pattern periods for requested channels when sawTooth pattern is requested
+	if (dpcd_pattern_type.value == AUDIO_TEST_PATTERN_SAWTOOTH ||
+			dpcd_pattern_type.value == AUDIO_TEST_PATTERN_OPERATOR_DEFINED) {
+
+		test_pattern = (dpcd_pattern_type.value == AUDIO_TEST_PATTERN_SAWTOOTH) ?
+				DP_TEST_PATTERN_AUDIO_SAWTOOTH : DP_TEST_PATTERN_AUDIO_OPERATOR_DEFINED;
+		// read period for each channel
+		for (channel = 0; channel < channel_count; channel++) {
+			core_link_read_dpcd(
+							link,
+							DP_TEST_AUDIO_PERIOD_CH1 + channel,
+							&dpcd_pattern_period[channel].raw,
+							sizeof(dpcd_pattern_period[channel]));
+		}
+	}
+
+	// translate sampling rate
+	switch (dpcd_test_mode.bits.sampling_rate) {
+	case AUDIO_SAMPLING_RATE_32KHZ:
+		sampling_rate_in_hz = 32000;
+		break;
+	case AUDIO_SAMPLING_RATE_44_1KHZ:
+		sampling_rate_in_hz = 44100;
+		break;
+	case AUDIO_SAMPLING_RATE_48KHZ:
+		sampling_rate_in_hz = 48000;
+		break;
+	case AUDIO_SAMPLING_RATE_88_2KHZ:
+		sampling_rate_in_hz = 88200;
+		break;
+	case AUDIO_SAMPLING_RATE_96KHZ:
+		sampling_rate_in_hz = 96000;
+		break;
+	case AUDIO_SAMPLING_RATE_176_4KHZ:
+		sampling_rate_in_hz = 176400;
+		break;
+	case AUDIO_SAMPLING_RATE_192KHZ:
+		sampling_rate_in_hz = 192000;
+		break;
+	default:
+		sampling_rate_in_hz = 0;
+		break;
+	}
+
+	link->audio_test_data.flags.test_requested = 1;
+	link->audio_test_data.flags.disable_video = disable_video;
+	link->audio_test_data.sampling_rate = sampling_rate_in_hz;
+	link->audio_test_data.channel_count = channel_count;
+	link->audio_test_data.pattern_type = test_pattern;
+
+	if (test_pattern == DP_TEST_PATTERN_AUDIO_SAWTOOTH) {
+		for (modes = 0; modes < pipe_ctx->stream->audio_info.mode_count; modes++) {
+			link->audio_test_data.pattern_period[modes] = dpcd_pattern_period[modes].bits.pattern_period;
+		}
+	}
+}
+
+/* TODO Raven hbr2 compliance eye output is unstable
+ * (toggling on and off) with debugger break
+ * This caueses intermittent PHY automation failure
+ * Need to look into the root cause */
+static void dp_test_send_phy_test_pattern(struct dc_link *link)
+{
+	union phy_test_pattern dpcd_test_pattern;
+	union lane_adjust dpcd_lane_adjustment[2];
+	unsigned char dpcd_post_cursor_2_adjustment = 0;
+	unsigned char test_pattern_buffer[
+			(DP_TEST_264BIT_CUSTOM_PATTERN_263_256 -
+			DP_TEST_264BIT_CUSTOM_PATTERN_7_0)+1] = {0};
+	unsigned int test_pattern_size = 0;
+	enum dp_test_pattern test_pattern;
+	union lane_adjust dpcd_lane_adjust;
+	unsigned int lane;
+	struct link_training_settings link_training_settings;
+	unsigned char no_preshoot = 0;
+	unsigned char no_deemphasis = 0;
+
+	dpcd_test_pattern.raw = 0;
+	memset(dpcd_lane_adjustment, 0, sizeof(dpcd_lane_adjustment));
+	memset(&link_training_settings, 0, sizeof(link_training_settings));
+
+	/* get phy test pattern and pattern parameters from DP receiver */
+	core_link_read_dpcd(
+			link,
+			DP_PHY_TEST_PATTERN,
+			&dpcd_test_pattern.raw,
+			sizeof(dpcd_test_pattern));
+	core_link_read_dpcd(
+			link,
+			DP_ADJUST_REQUEST_LANE0_1,
+			&dpcd_lane_adjustment[0].raw,
+			sizeof(dpcd_lane_adjustment));
+
+	/* prepare link training settings */
+	link_training_settings.link_settings = link->cur_link_settings;
+
+	link_training_settings.lttpr_mode = dp_decide_lttpr_mode(link, &link->cur_link_settings);
+
+	if ((link->chip_caps & EXT_DISPLAY_PATH_CAPS__DP_FIXED_VS_EN) &&
+			link_training_settings.lttpr_mode == LTTPR_MODE_TRANSPARENT)
+		dp_fixed_vs_pe_read_lane_adjust(
+				link,
+				link_training_settings.dpcd_lane_settings);
+
+	/*get post cursor 2 parameters
+	 * For DP 1.1a or eariler, this DPCD register's value is 0
+	 * For DP 1.2 or later:
+	 * Bits 1:0 = POST_CURSOR2_LANE0; Bits 3:2 = POST_CURSOR2_LANE1
+	 * Bits 5:4 = POST_CURSOR2_LANE2; Bits 7:6 = POST_CURSOR2_LANE3
+	 */
+	core_link_read_dpcd(
+			link,
+			DP_ADJUST_REQUEST_POST_CURSOR2,
+			&dpcd_post_cursor_2_adjustment,
+			sizeof(dpcd_post_cursor_2_adjustment));
+
+	/* translate request */
+	switch (dpcd_test_pattern.bits.PATTERN) {
+	case PHY_TEST_PATTERN_D10_2:
+		test_pattern = DP_TEST_PATTERN_D102;
+		break;
+	case PHY_TEST_PATTERN_SYMBOL_ERROR:
+		test_pattern = DP_TEST_PATTERN_SYMBOL_ERROR;
+		break;
+	case PHY_TEST_PATTERN_PRBS7:
+		test_pattern = DP_TEST_PATTERN_PRBS7;
+		break;
+	case PHY_TEST_PATTERN_80BIT_CUSTOM:
+		test_pattern = DP_TEST_PATTERN_80BIT_CUSTOM;
+		break;
+	case PHY_TEST_PATTERN_CP2520_1:
+		/* CP2520 pattern is unstable, temporarily use TPS4 instead */
+		test_pattern = (link->dc->caps.force_dp_tps4_for_cp2520 == 1) ?
+				DP_TEST_PATTERN_TRAINING_PATTERN4 :
+				DP_TEST_PATTERN_HBR2_COMPLIANCE_EYE;
+		break;
+	case PHY_TEST_PATTERN_CP2520_2:
+		/* CP2520 pattern is unstable, temporarily use TPS4 instead */
+		test_pattern = (link->dc->caps.force_dp_tps4_for_cp2520 == 1) ?
+				DP_TEST_PATTERN_TRAINING_PATTERN4 :
+				DP_TEST_PATTERN_HBR2_COMPLIANCE_EYE;
+		break;
+	case PHY_TEST_PATTERN_CP2520_3:
+		test_pattern = DP_TEST_PATTERN_TRAINING_PATTERN4;
+		break;
+	case PHY_TEST_PATTERN_128b_132b_TPS1:
+		test_pattern = DP_TEST_PATTERN_128b_132b_TPS1;
+		break;
+	case PHY_TEST_PATTERN_128b_132b_TPS2:
+		test_pattern = DP_TEST_PATTERN_128b_132b_TPS2;
+		break;
+	case PHY_TEST_PATTERN_PRBS9:
+		test_pattern = DP_TEST_PATTERN_PRBS9;
+		break;
+	case PHY_TEST_PATTERN_PRBS11:
+		test_pattern = DP_TEST_PATTERN_PRBS11;
+		break;
+	case PHY_TEST_PATTERN_PRBS15:
+		test_pattern = DP_TEST_PATTERN_PRBS15;
+		break;
+	case PHY_TEST_PATTERN_PRBS23:
+		test_pattern = DP_TEST_PATTERN_PRBS23;
+		break;
+	case PHY_TEST_PATTERN_PRBS31:
+		test_pattern = DP_TEST_PATTERN_PRBS31;
+		break;
+	case PHY_TEST_PATTERN_264BIT_CUSTOM:
+		test_pattern = DP_TEST_PATTERN_264BIT_CUSTOM;
+		break;
+	case PHY_TEST_PATTERN_SQUARE:
+		test_pattern = DP_TEST_PATTERN_SQUARE;
+		break;
+	case PHY_TEST_PATTERN_SQUARE_PRESHOOT_DISABLED:
+		test_pattern = DP_TEST_PATTERN_SQUARE_PRESHOOT_DISABLED;
+		no_preshoot = 1;
+		break;
+	case PHY_TEST_PATTERN_SQUARE_DEEMPHASIS_DISABLED:
+		test_pattern = DP_TEST_PATTERN_SQUARE_DEEMPHASIS_DISABLED;
+		no_deemphasis = 1;
+		break;
+	case PHY_TEST_PATTERN_SQUARE_PRESHOOT_DEEMPHASIS_DISABLED:
+		test_pattern = DP_TEST_PATTERN_SQUARE_PRESHOOT_DEEMPHASIS_DISABLED;
+		no_preshoot = 1;
+		no_deemphasis = 1;
+		break;
+	default:
+		test_pattern = DP_TEST_PATTERN_VIDEO_MODE;
+	break;
+	}
+
+	if (test_pattern == DP_TEST_PATTERN_80BIT_CUSTOM) {
+		test_pattern_size = (DP_TEST_80BIT_CUSTOM_PATTERN_79_72 -
+				DP_TEST_80BIT_CUSTOM_PATTERN_7_0) + 1;
+		core_link_read_dpcd(
+				link,
+				DP_TEST_80BIT_CUSTOM_PATTERN_7_0,
+				test_pattern_buffer,
+				test_pattern_size);
+	}
+
+	if (is_dp_phy_sqaure_pattern(test_pattern)) {
+		test_pattern_size = 1; // Square pattern data is 1 byte (DP spec)
+		core_link_read_dpcd(
+				link,
+				DP_PHY_SQUARE_PATTERN,
+				test_pattern_buffer,
+				test_pattern_size);
+	}
+
+	if (test_pattern == DP_TEST_PATTERN_264BIT_CUSTOM) {
+		test_pattern_size = (DP_TEST_264BIT_CUSTOM_PATTERN_263_256-
+				DP_TEST_264BIT_CUSTOM_PATTERN_7_0) + 1;
+		core_link_read_dpcd(
+				link,
+				DP_TEST_264BIT_CUSTOM_PATTERN_7_0,
+				test_pattern_buffer,
+				test_pattern_size);
+	}
+
+	for (lane = 0; lane <
+		(unsigned int)(link->cur_link_settings.lane_count);
+		lane++) {
+		dpcd_lane_adjust.raw =
+			dp_get_nibble_at_index(&dpcd_lane_adjustment[0].raw, lane);
+		if (link_dp_get_encoding_format(&link->cur_link_settings) ==
+				DP_8b_10b_ENCODING) {
+			link_training_settings.hw_lane_settings[lane].VOLTAGE_SWING =
+				(enum dc_voltage_swing)
+				(dpcd_lane_adjust.bits.VOLTAGE_SWING_LANE);
+			link_training_settings.hw_lane_settings[lane].PRE_EMPHASIS =
+				(enum dc_pre_emphasis)
+				(dpcd_lane_adjust.bits.PRE_EMPHASIS_LANE);
+			link_training_settings.hw_lane_settings[lane].POST_CURSOR2 =
+				(enum dc_post_cursor2)
+				((dpcd_post_cursor_2_adjustment >> (lane * 2)) & 0x03);
+		} else if (link_dp_get_encoding_format(&link->cur_link_settings) ==
+				DP_128b_132b_ENCODING) {
+			link_training_settings.hw_lane_settings[lane].FFE_PRESET.settings.level =
+					dpcd_lane_adjust.tx_ffe.PRESET_VALUE;
+			link_training_settings.hw_lane_settings[lane].FFE_PRESET.settings.no_preshoot = no_preshoot;
+			link_training_settings.hw_lane_settings[lane].FFE_PRESET.settings.no_deemphasis = no_deemphasis;
+		}
+	}
+
+	dp_hw_to_dpcd_lane_settings(&link_training_settings,
+			link_training_settings.hw_lane_settings,
+			link_training_settings.dpcd_lane_settings);
+	/*Usage: Measure DP physical lane signal
+	 * by DP SI test equipment automatically.
+	 * PHY test pattern request is generated by equipment via HPD interrupt.
+	 * HPD needs to be active all the time. HPD should be active
+	 * all the time. Do not touch it.
+	 * forward request to DS
+	 */
+	dp_set_test_pattern(
+		link,
+		test_pattern,
+		DP_TEST_PATTERN_COLOR_SPACE_UNDEFINED,
+		&link_training_settings,
+		test_pattern_buffer,
+		test_pattern_size);
+}
+
+static void set_crtc_test_pattern(struct dc_link *link,
+				struct pipe_ctx *pipe_ctx,
+				enum dp_test_pattern test_pattern,
+				enum dp_test_pattern_color_space test_pattern_color_space)
+{
+	enum controller_dp_test_pattern controller_test_pattern;
+	enum dc_color_depth color_depth = pipe_ctx->
+		stream->timing.display_color_depth;
+	struct bit_depth_reduction_params params;
+	struct output_pixel_processor *opp = pipe_ctx->stream_res.opp;
+	struct pipe_ctx *odm_pipe;
+	int odm_cnt = 1;
+	int h_active = pipe_ctx->stream->timing.h_addressable +
+		pipe_ctx->stream->timing.h_border_left +
+		pipe_ctx->stream->timing.h_border_right;
+	int v_active = pipe_ctx->stream->timing.v_addressable +
+		pipe_ctx->stream->timing.v_border_bottom +
+		pipe_ctx->stream->timing.v_border_top;
+	int odm_slice_width, last_odm_slice_width, offset = 0;
+
+	memset(&params, 0, sizeof(params));
+
+	for (odm_pipe = pipe_ctx->next_odm_pipe; odm_pipe; odm_pipe = odm_pipe->next_odm_pipe)
+		odm_cnt++;
+
+	odm_slice_width = h_active / odm_cnt;
+	last_odm_slice_width = h_active - odm_slice_width * (odm_cnt - 1);
+
+	switch (test_pattern) {
+	case DP_TEST_PATTERN_COLOR_SQUARES:
+		controller_test_pattern =
+				CONTROLLER_DP_TEST_PATTERN_COLORSQUARES;
+	break;
+	case DP_TEST_PATTERN_COLOR_SQUARES_CEA:
+		controller_test_pattern =
+				CONTROLLER_DP_TEST_PATTERN_COLORSQUARES_CEA;
+	break;
+	case DP_TEST_PATTERN_VERTICAL_BARS:
+		controller_test_pattern =
+				CONTROLLER_DP_TEST_PATTERN_VERTICALBARS;
+	break;
+	case DP_TEST_PATTERN_HORIZONTAL_BARS:
+		controller_test_pattern =
+				CONTROLLER_DP_TEST_PATTERN_HORIZONTALBARS;
+	break;
+	case DP_TEST_PATTERN_COLOR_RAMP:
+		controller_test_pattern =
+				CONTROLLER_DP_TEST_PATTERN_COLORRAMP;
+	break;
+	default:
+		controller_test_pattern =
+				CONTROLLER_DP_TEST_PATTERN_VIDEOMODE;
+	break;
+	}
+
+	switch (test_pattern) {
+	case DP_TEST_PATTERN_COLOR_SQUARES:
+	case DP_TEST_PATTERN_COLOR_SQUARES_CEA:
+	case DP_TEST_PATTERN_VERTICAL_BARS:
+	case DP_TEST_PATTERN_HORIZONTAL_BARS:
+	case DP_TEST_PATTERN_COLOR_RAMP:
+	{
+		/* disable bit depth reduction */
+		pipe_ctx->stream->bit_depth_params = params;
+		if (pipe_ctx->stream_res.tg->funcs->set_test_pattern) {
+			opp->funcs->opp_program_bit_depth_reduction(opp, &params);
+			pipe_ctx->stream_res.tg->funcs->set_test_pattern(pipe_ctx->stream_res.tg,
+				controller_test_pattern, color_depth);
+		} else if (link->dc->hwss.set_disp_pattern_generator) {
+			enum controller_dp_color_space controller_color_space;
+			struct output_pixel_processor *odm_opp;
+
+			switch (test_pattern_color_space) {
+			case DP_TEST_PATTERN_COLOR_SPACE_RGB:
+				controller_color_space = CONTROLLER_DP_COLOR_SPACE_RGB;
+				break;
+			case DP_TEST_PATTERN_COLOR_SPACE_YCBCR601:
+				controller_color_space = CONTROLLER_DP_COLOR_SPACE_YCBCR601;
+				break;
+			case DP_TEST_PATTERN_COLOR_SPACE_YCBCR709:
+				controller_color_space = CONTROLLER_DP_COLOR_SPACE_YCBCR709;
+				break;
+			case DP_TEST_PATTERN_COLOR_SPACE_UNDEFINED:
+			default:
+				controller_color_space = CONTROLLER_DP_COLOR_SPACE_UDEFINED;
+				DC_LOG_ERROR("%s: Color space must be defined for test pattern", __func__);
+				ASSERT(0);
+				break;
+			}
+
+			odm_pipe = pipe_ctx;
+			while (odm_pipe->next_odm_pipe) {
+				odm_opp = odm_pipe->stream_res.opp;
+				odm_opp->funcs->opp_program_bit_depth_reduction(odm_opp, &params);
+				link->dc->hwss.set_disp_pattern_generator(link->dc,
+						odm_pipe,
+						controller_test_pattern,
+						controller_color_space,
+						color_depth,
+						NULL,
+						odm_slice_width,
+						v_active,
+						offset);
+				offset += odm_slice_width;
+				odm_pipe = odm_pipe->next_odm_pipe;
+			}
+			odm_opp = odm_pipe->stream_res.opp;
+			odm_opp->funcs->opp_program_bit_depth_reduction(odm_opp, &params);
+			link->dc->hwss.set_disp_pattern_generator(link->dc,
+					odm_pipe,
+					controller_test_pattern,
+					controller_color_space,
+					color_depth,
+					NULL,
+					last_odm_slice_width,
+					v_active,
+					offset);
+		}
+	}
+	break;
+	case DP_TEST_PATTERN_VIDEO_MODE:
+	{
+		/* restore bitdepth reduction */
+		resource_build_bit_depth_reduction_params(pipe_ctx->stream, &params);
+		pipe_ctx->stream->bit_depth_params = params;
+		if (pipe_ctx->stream_res.tg->funcs->set_test_pattern) {
+			opp->funcs->opp_program_bit_depth_reduction(opp, &params);
+			pipe_ctx->stream_res.tg->funcs->set_test_pattern(pipe_ctx->stream_res.tg,
+					CONTROLLER_DP_TEST_PATTERN_VIDEOMODE,
+					color_depth);
+		} else if (link->dc->hwss.set_disp_pattern_generator) {
+			struct output_pixel_processor *odm_opp;
+
+			odm_pipe = pipe_ctx;
+			while (odm_pipe->next_odm_pipe) {
+				odm_opp = odm_pipe->stream_res.opp;
+				odm_opp->funcs->opp_program_bit_depth_reduction(odm_opp, &params);
+				link->dc->hwss.set_disp_pattern_generator(link->dc,
+						odm_pipe,
+						CONTROLLER_DP_TEST_PATTERN_VIDEOMODE,
+						CONTROLLER_DP_COLOR_SPACE_UDEFINED,
+						color_depth,
+						NULL,
+						odm_slice_width,
+						v_active,
+						offset);
+				offset += odm_slice_width;
+				odm_pipe = odm_pipe->next_odm_pipe;
+			}
+			odm_opp = odm_pipe->stream_res.opp;
+			odm_opp->funcs->opp_program_bit_depth_reduction(odm_opp, &params);
+			link->dc->hwss.set_disp_pattern_generator(link->dc,
+					odm_pipe,
+					CONTROLLER_DP_TEST_PATTERN_VIDEOMODE,
+					CONTROLLER_DP_COLOR_SPACE_UDEFINED,
+					color_depth,
+					NULL,
+					last_odm_slice_width,
+					v_active,
+					offset);
+		}
+	}
+	break;
+
+	default:
+	break;
+	}
+}
+
+void dp_handle_automated_test(struct dc_link *link)
+{
+	union test_request test_request;
+	union test_response test_response;
+
+	memset(&test_request, 0, sizeof(test_request));
+	memset(&test_response, 0, sizeof(test_response));
+
+	core_link_read_dpcd(
+		link,
+		DP_TEST_REQUEST,
+		&test_request.raw,
+		sizeof(union test_request));
+	if (test_request.bits.LINK_TRAINING) {
+		/* ACK first to let DP RX test box monitor LT sequence */
+		test_response.bits.ACK = 1;
+		core_link_write_dpcd(
+			link,
+			DP_TEST_RESPONSE,
+			&test_response.raw,
+			sizeof(test_response));
+		dp_test_send_link_training(link);
+		/* no acknowledge request is needed again */
+		test_response.bits.ACK = 0;
+	}
+	if (test_request.bits.LINK_TEST_PATTRN) {
+		union test_misc dpcd_test_params;
+		union link_test_pattern dpcd_test_pattern;
+
+		memset(&dpcd_test_pattern, 0, sizeof(dpcd_test_pattern));
+		memset(&dpcd_test_params, 0, sizeof(dpcd_test_params));
+
+		/* get link test pattern and pattern parameters */
+		core_link_read_dpcd(
+				link,
+				DP_TEST_PATTERN,
+				&dpcd_test_pattern.raw,
+				sizeof(dpcd_test_pattern));
+		core_link_read_dpcd(
+				link,
+				DP_TEST_MISC0,
+				&dpcd_test_params.raw,
+				sizeof(dpcd_test_params));
+		test_response.bits.ACK = dm_helpers_dp_handle_test_pattern_request(link->ctx, link,
+				dpcd_test_pattern, dpcd_test_params) ? 1 : 0;
+	}
+
+	if (test_request.bits.AUDIO_TEST_PATTERN) {
+		dp_test_get_audio_test_data(link, test_request.bits.TEST_AUDIO_DISABLED_VIDEO);
+		test_response.bits.ACK = 1;
+	}
+
+	if (test_request.bits.PHY_TEST_PATTERN) {
+		dp_test_send_phy_test_pattern(link);
+		test_response.bits.ACK = 1;
+	}
+
+	/* send request acknowledgment */
+	if (test_response.bits.ACK)
+		core_link_write_dpcd(
+			link,
+			DP_TEST_RESPONSE,
+			&test_response.raw,
+			sizeof(test_response));
+}
+
+bool dp_set_test_pattern(
+	struct dc_link *link,
+	enum dp_test_pattern test_pattern,
+	enum dp_test_pattern_color_space test_pattern_color_space,
+	const struct link_training_settings *p_link_settings,
+	const unsigned char *p_custom_pattern,
+	unsigned int cust_pattern_size)
+{
+	struct pipe_ctx *pipes = link->dc->current_state->res_ctx.pipe_ctx;
+	struct pipe_ctx *pipe_ctx = NULL;
+	unsigned int lane;
+	unsigned int i;
+	unsigned char link_qual_pattern[LANE_COUNT_DP_MAX] = {0};
+	union dpcd_training_pattern training_pattern;
+	enum dpcd_phy_test_patterns pattern;
+
+	memset(&training_pattern, 0, sizeof(training_pattern));
+
+	for (i = 0; i < MAX_PIPES; i++) {
+		if (pipes[i].stream == NULL)
+			continue;
+
+		if (resource_is_pipe_type(&pipes[i], OTG_MASTER) &&
+				pipes[i].stream->link == link) {
+			pipe_ctx = &pipes[i];
+			break;
+		}
+	}
+
+	if (pipe_ctx == NULL)
+		return false;
+
+	/* Reset CRTC Test Pattern if it is currently running and request is VideoMode */
+	if (link->test_pattern_enabled && test_pattern ==
+			DP_TEST_PATTERN_VIDEO_MODE) {
+		/* Set CRTC Test Pattern */
+		set_crtc_test_pattern(link, pipe_ctx, test_pattern, test_pattern_color_space);
+		dp_set_hw_test_pattern(link, &pipe_ctx->link_res, test_pattern,
+				(uint8_t *)p_custom_pattern,
+				(uint32_t)cust_pattern_size);
+
+		/* Unblank Stream */
+		link->dc->hwss.unblank_stream(
+			pipe_ctx,
+			&link->verified_link_cap);
+		/* TODO:m_pHwss->MuteAudioEndpoint
+		 * (pPathMode->pDisplayPath, false);
+		 */
+
+		/* Reset Test Pattern state */
+		link->test_pattern_enabled = false;
+		link->current_test_pattern = test_pattern;
+
+		return true;
+	}
+
+	/* Check for PHY Test Patterns */
+	if (is_dp_phy_pattern(test_pattern)) {
+		/* Set DPCD Lane Settings before running test pattern */
+		if (p_link_settings != NULL) {
+			if ((link->chip_caps & EXT_DISPLAY_PATH_CAPS__DP_FIXED_VS_EN) &&
+					p_link_settings->lttpr_mode == LTTPR_MODE_TRANSPARENT) {
+				dp_fixed_vs_pe_set_retimer_lane_settings(
+						link,
+						p_link_settings->dpcd_lane_settings,
+						p_link_settings->link_settings.lane_count);
+			} else {
+				dp_set_hw_lane_settings(link, &pipe_ctx->link_res, p_link_settings, DPRX);
+			}
+			dpcd_set_lane_settings(link, p_link_settings, DPRX);
+		}
+
+		/* Blank stream if running test pattern */
+		if (test_pattern != DP_TEST_PATTERN_VIDEO_MODE) {
+			/*TODO:
+			 * m_pHwss->
+			 * MuteAudioEndpoint(pPathMode->pDisplayPath, true);
+			 */
+			/* Blank stream */
+			link->dc->hwss.blank_stream(pipe_ctx);
+		}
+
+		dp_set_hw_test_pattern(link, &pipe_ctx->link_res, test_pattern,
+				(uint8_t *)p_custom_pattern,
+				(uint32_t)cust_pattern_size);
+
+		if (test_pattern != DP_TEST_PATTERN_VIDEO_MODE) {
+			/* Set Test Pattern state */
+			link->test_pattern_enabled = true;
+			link->current_test_pattern = test_pattern;
+			if (p_link_settings != NULL)
+				dpcd_set_link_settings(link,
+						p_link_settings);
+		}
+
+		switch (test_pattern) {
+		case DP_TEST_PATTERN_VIDEO_MODE:
+			pattern = PHY_TEST_PATTERN_NONE;
+			break;
+		case DP_TEST_PATTERN_D102:
+			pattern = PHY_TEST_PATTERN_D10_2;
+			break;
+		case DP_TEST_PATTERN_SYMBOL_ERROR:
+			pattern = PHY_TEST_PATTERN_SYMBOL_ERROR;
+			break;
+		case DP_TEST_PATTERN_PRBS7:
+			pattern = PHY_TEST_PATTERN_PRBS7;
+			break;
+		case DP_TEST_PATTERN_80BIT_CUSTOM:
+			pattern = PHY_TEST_PATTERN_80BIT_CUSTOM;
+			break;
+		case DP_TEST_PATTERN_CP2520_1:
+			pattern = PHY_TEST_PATTERN_CP2520_1;
+			break;
+		case DP_TEST_PATTERN_CP2520_2:
+			pattern = PHY_TEST_PATTERN_CP2520_2;
+			break;
+		case DP_TEST_PATTERN_CP2520_3:
+			pattern = PHY_TEST_PATTERN_CP2520_3;
+			break;
+		case DP_TEST_PATTERN_128b_132b_TPS1:
+			pattern = PHY_TEST_PATTERN_128b_132b_TPS1;
+			break;
+		case DP_TEST_PATTERN_128b_132b_TPS2:
+			pattern = PHY_TEST_PATTERN_128b_132b_TPS2;
+			break;
+		case DP_TEST_PATTERN_PRBS9:
+			pattern = PHY_TEST_PATTERN_PRBS9;
+			break;
+		case DP_TEST_PATTERN_PRBS11:
+			pattern = PHY_TEST_PATTERN_PRBS11;
+			break;
+		case DP_TEST_PATTERN_PRBS15:
+			pattern = PHY_TEST_PATTERN_PRBS15;
+			break;
+		case DP_TEST_PATTERN_PRBS23:
+			pattern = PHY_TEST_PATTERN_PRBS23;
+			break;
+		case DP_TEST_PATTERN_PRBS31:
+			pattern = PHY_TEST_PATTERN_PRBS31;
+			break;
+		case DP_TEST_PATTERN_264BIT_CUSTOM:
+			pattern = PHY_TEST_PATTERN_264BIT_CUSTOM;
+			break;
+		case DP_TEST_PATTERN_SQUARE:
+			pattern = PHY_TEST_PATTERN_SQUARE;
+			break;
+		case DP_TEST_PATTERN_SQUARE_PRESHOOT_DISABLED:
+			pattern = PHY_TEST_PATTERN_SQUARE_PRESHOOT_DISABLED;
+			break;
+		case DP_TEST_PATTERN_SQUARE_DEEMPHASIS_DISABLED:
+			pattern = PHY_TEST_PATTERN_SQUARE_DEEMPHASIS_DISABLED;
+			break;
+		case DP_TEST_PATTERN_SQUARE_PRESHOOT_DEEMPHASIS_DISABLED:
+			pattern = PHY_TEST_PATTERN_SQUARE_PRESHOOT_DEEMPHASIS_DISABLED;
+			break;
+		default:
+			return false;
+		}
+
+		if (test_pattern == DP_TEST_PATTERN_VIDEO_MODE
+		/*TODO:&& !pPathMode->pDisplayPath->IsTargetPoweredOn()*/)
+			return false;
+
+		if (link->dpcd_caps.dpcd_rev.raw >= DPCD_REV_12) {
+			if (is_dp_phy_sqaure_pattern(test_pattern))
+				core_link_write_dpcd(link,
+						DP_LINK_SQUARE_PATTERN,
+						p_custom_pattern,
+						1);
+
+			/* tell receiver that we are sending qualification
+			 * pattern DP 1.2 or later - DP receiver's link quality
+			 * pattern is set using DPCD LINK_QUAL_LANEx_SET
+			 * register (0x10B~0x10E)\
+			 */
+			for (lane = 0; lane < LANE_COUNT_DP_MAX; lane++)
+				link_qual_pattern[lane] =
+						(unsigned char)(pattern);
+
+			core_link_write_dpcd(link,
+					DP_LINK_QUAL_LANE0_SET,
+					link_qual_pattern,
+					sizeof(link_qual_pattern));
+		} else if (link->dpcd_caps.dpcd_rev.raw >= DPCD_REV_10 ||
+			   link->dpcd_caps.dpcd_rev.raw == 0) {
+			/* tell receiver that we are sending qualification
+			 * pattern DP 1.1a or earlier - DP receiver's link
+			 * quality pattern is set using
+			 * DPCD TRAINING_PATTERN_SET -> LINK_QUAL_PATTERN_SET
+			 * register (0x102). We will use v_1.3 when we are
+			 * setting test pattern for DP 1.1.
+			 */
+			core_link_read_dpcd(link, DP_TRAINING_PATTERN_SET,
+					    &training_pattern.raw,
+					    sizeof(training_pattern));
+			training_pattern.v1_3.LINK_QUAL_PATTERN_SET = pattern;
+			core_link_write_dpcd(link, DP_TRAINING_PATTERN_SET,
+					     &training_pattern.raw,
+					     sizeof(training_pattern));
+		}
+	} else {
+		enum dc_color_space color_space = COLOR_SPACE_UNKNOWN;
+
+		switch (test_pattern_color_space) {
+		case DP_TEST_PATTERN_COLOR_SPACE_RGB:
+			color_space = COLOR_SPACE_SRGB;
+			if (test_pattern == DP_TEST_PATTERN_COLOR_SQUARES_CEA)
+				color_space = COLOR_SPACE_SRGB_LIMITED;
+			break;
+
+		case DP_TEST_PATTERN_COLOR_SPACE_YCBCR601:
+			color_space = COLOR_SPACE_YCBCR601;
+			if (test_pattern == DP_TEST_PATTERN_COLOR_SQUARES_CEA)
+				color_space = COLOR_SPACE_YCBCR601_LIMITED;
+			break;
+		case DP_TEST_PATTERN_COLOR_SPACE_YCBCR709:
+			color_space = COLOR_SPACE_YCBCR709;
+			if (test_pattern == DP_TEST_PATTERN_COLOR_SQUARES_CEA)
+				color_space = COLOR_SPACE_YCBCR709_LIMITED;
+			break;
+		default:
+			break;
+		}
+
+		if (pipe_ctx->stream_res.tg->funcs->lock_doublebuffer_enable) {
+			if (pipe_ctx->stream && should_use_dmub_lock(pipe_ctx->stream->link)) {
+				union dmub_hw_lock_flags hw_locks = { 0 };
+				struct dmub_hw_lock_inst_flags inst_flags = { 0 };
+
+				hw_locks.bits.lock_dig = 1;
+				inst_flags.dig_inst = pipe_ctx->stream_res.tg->inst;
+
+				dmub_hw_lock_mgr_cmd(link->ctx->dmub_srv,
+							true,
+							&hw_locks,
+							&inst_flags);
+			} else
+				pipe_ctx->stream_res.tg->funcs->lock_doublebuffer_enable(
+						pipe_ctx->stream_res.tg);
+		}
+
+		pipe_ctx->stream_res.tg->funcs->lock(pipe_ctx->stream_res.tg);
+		/* update MSA to requested color space */
+		pipe_ctx->stream_res.stream_enc->funcs->dp_set_stream_attribute(pipe_ctx->stream_res.stream_enc,
+				&pipe_ctx->stream->timing,
+				color_space,
+				pipe_ctx->stream->use_vsc_sdp_for_colorimetry,
+				link->dpcd_caps.dprx_feature.bits.SST_SPLIT_SDP_CAP);
+
+		if (pipe_ctx->stream->use_vsc_sdp_for_colorimetry) {
+			if (test_pattern == DP_TEST_PATTERN_COLOR_SQUARES_CEA)
+				pipe_ctx->stream->vsc_infopacket.sb[17] |= (1 << 7); // sb17 bit 7 Dynamic Range: 0 = VESA range, 1 = CTA range
+			else
+				pipe_ctx->stream->vsc_infopacket.sb[17] &= ~(1 << 7);
+			resource_build_info_frame(pipe_ctx);
+			link->dc->hwss.update_info_frame(pipe_ctx);
+		}
+
+		/* CRTC Patterns */
+		set_crtc_test_pattern(link, pipe_ctx, test_pattern, test_pattern_color_space);
+		pipe_ctx->stream_res.tg->funcs->unlock(pipe_ctx->stream_res.tg);
+		pipe_ctx->stream_res.tg->funcs->wait_for_state(pipe_ctx->stream_res.tg,
+				CRTC_STATE_VACTIVE);
+		pipe_ctx->stream_res.tg->funcs->wait_for_state(pipe_ctx->stream_res.tg,
+				CRTC_STATE_VBLANK);
+		pipe_ctx->stream_res.tg->funcs->wait_for_state(pipe_ctx->stream_res.tg,
+				CRTC_STATE_VACTIVE);
+
+		if (pipe_ctx->stream_res.tg->funcs->lock_doublebuffer_disable) {
+			if (pipe_ctx->stream && should_use_dmub_lock(pipe_ctx->stream->link)) {
+				union dmub_hw_lock_flags hw_locks = { 0 };
+				struct dmub_hw_lock_inst_flags inst_flags = { 0 };
+
+				hw_locks.bits.lock_dig = 1;
+				inst_flags.dig_inst = pipe_ctx->stream_res.tg->inst;
+
+				dmub_hw_lock_mgr_cmd(link->ctx->dmub_srv,
+							false,
+							&hw_locks,
+							&inst_flags);
+			} else
+				pipe_ctx->stream_res.tg->funcs->lock_doublebuffer_disable(
+						pipe_ctx->stream_res.tg);
+		}
+
+		/* Set Test Pattern state */
+		link->test_pattern_enabled = true;
+		link->current_test_pattern = test_pattern;
+	}
+
+	return true;
+}
+
+void dp_set_preferred_link_settings(struct dc *dc,
+		struct dc_link_settings *link_setting,
+		struct dc_link *link)
+{
+	int i;
+	struct pipe_ctx *pipe;
+	struct dc_stream_state *link_stream;
+	struct dc_link_settings store_settings = *link_setting;
+
+	link->preferred_link_setting = store_settings;
+
+	/* Retrain with preferred link settings only relevant for
+	 * DP signal type
+	 * Check for non-DP signal or if passive dongle present
+	 */
+	if (!dc_is_dp_signal(link->connector_signal) ||
+		link->dongle_max_pix_clk > 0)
+		return;
+
+	for (i = 0; i < MAX_PIPES; i++) {
+		pipe = &dc->current_state->res_ctx.pipe_ctx[i];
+		if (pipe->stream && pipe->stream->link) {
+			if (pipe->stream->link == link) {
+				link_stream = pipe->stream;
+				break;
+			}
+		}
+	}
+
+	/* Stream not found */
+	if (i == MAX_PIPES)
+		return;
+
+	/* Cannot retrain link if backend is off */
+	if (link_stream->dpms_off)
+		return;
+
+	if (link_decide_link_settings(link_stream, &store_settings))
+		dp_retrain_link_dp_test(link, &store_settings, false);
+}
+
+void dp_set_preferred_training_settings(struct dc *dc,
+		struct dc_link_settings *link_setting,
+		struct dc_link_training_overrides *lt_overrides,
+		struct dc_link *link,
+		bool skip_immediate_retrain)
+{
+	if (lt_overrides != NULL)
+		link->preferred_training_settings = *lt_overrides;
+	else
+		memset(&link->preferred_training_settings, 0, sizeof(link->preferred_training_settings));
+
+	if (link_setting != NULL) {
+		link->preferred_link_setting = *link_setting;
+	} else {
+		link->preferred_link_setting.lane_count = LANE_COUNT_UNKNOWN;
+		link->preferred_link_setting.link_rate = LINK_RATE_UNKNOWN;
+	}
+
+	if (link->connector_signal == SIGNAL_TYPE_DISPLAY_PORT &&
+			link->type == dc_connection_mst_branch)
+		dm_helpers_dp_mst_update_branch_bandwidth(dc->ctx, link);
+
+	/* Retrain now, or wait until next stream update to apply */
+	if (skip_immediate_retrain == false)
+		dp_set_preferred_link_settings(dc, &link->preferred_link_setting, link);
+}
diff --git a/drivers/gpu/drm/amd/display/dc/link/accessories/link_dp_cts.h b/drivers/gpu/drm/amd/display/dc/link/accessories/link_dp_cts.h
new file mode 100644
index 000000000..eae23ea7f
--- /dev/null
+++ b/drivers/gpu/drm/amd/display/dc/link/accessories/link_dp_cts.h
@@ -0,0 +1,44 @@
+/*
+ * Copyright 2023 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 __LINK_DP_CTS_H__
+#define __LINK_DP_CTS_H__
+#include "link.h"
+void dp_handle_automated_test(struct dc_link *link);
+bool dp_set_test_pattern(
+		struct dc_link *link,
+		enum dp_test_pattern test_pattern,
+		enum dp_test_pattern_color_space test_pattern_color_space,
+		const struct link_training_settings *p_link_settings,
+		const unsigned char *p_custom_pattern,
+		unsigned int cust_pattern_size);
+void dp_set_preferred_link_settings(struct dc *dc,
+		struct dc_link_settings *link_setting,
+		struct dc_link *link);
+void dp_set_preferred_training_settings(struct dc *dc,
+		struct dc_link_settings *link_setting,
+		struct dc_link_training_overrides *lt_overrides,
+		struct dc_link *link,
+		bool skip_immediate_retrain);
+#endif /* __LINK_DP_CTS_H__ */
diff --git a/drivers/gpu/drm/amd/display/dc/link/accessories/link_dp_trace.c b/drivers/gpu/drm/amd/display/dc/link/accessories/link_dp_trace.c
new file mode 100644
index 000000000..fbcd8fb58
--- /dev/null
+++ b/drivers/gpu/drm/amd/display/dc/link/accessories/link_dp_trace.c
@@ -0,0 +1,173 @@
+/*
+ * Copyright 2022 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 "link_dp_trace.h"
+#include "link/protocols/link_dpcd.h"
+#include "link.h"
+
+void dp_trace_init(struct dc_link *link)
+{
+	memset(&link->dp_trace, 0, sizeof(link->dp_trace));
+	link->dp_trace.is_initialized = true;
+}
+
+void dp_trace_reset(struct dc_link *link)
+{
+	memset(&link->dp_trace, 0, sizeof(link->dp_trace));
+}
+
+bool dp_trace_is_initialized(struct dc_link *link)
+{
+	return link->dp_trace.is_initialized;
+}
+
+void dp_trace_detect_lt_init(struct dc_link *link)
+{
+	memset(&link->dp_trace.detect_lt_trace, 0, sizeof(link->dp_trace.detect_lt_trace));
+}
+
+void dp_trace_commit_lt_init(struct dc_link *link)
+{
+	memset(&link->dp_trace.commit_lt_trace, 0, sizeof(link->dp_trace.commit_lt_trace));
+}
+
+void dp_trace_link_loss_increment(struct dc_link *link)
+{
+	link->dp_trace.link_loss_count++;
+}
+
+void dp_trace_lt_fail_count_update(struct dc_link *link,
+		unsigned int fail_count,
+		bool in_detection)
+{
+	if (in_detection)
+		link->dp_trace.detect_lt_trace.counts.fail = fail_count;
+	else
+		link->dp_trace.commit_lt_trace.counts.fail = fail_count;
+}
+
+void dp_trace_lt_total_count_increment(struct dc_link *link,
+		bool in_detection)
+{
+	if (in_detection)
+		link->dp_trace.detect_lt_trace.counts.total++;
+	else
+		link->dp_trace.commit_lt_trace.counts.total++;
+}
+
+void dp_trace_set_is_logged_flag(struct dc_link *link,
+		bool in_detection,
+		bool is_logged)
+{
+	if (in_detection)
+		link->dp_trace.detect_lt_trace.is_logged = is_logged;
+	else
+		link->dp_trace.commit_lt_trace.is_logged = is_logged;
+}
+
+bool dp_trace_is_logged(struct dc_link *link, bool in_detection)
+{
+	if (in_detection)
+		return link->dp_trace.detect_lt_trace.is_logged;
+	else
+		return link->dp_trace.commit_lt_trace.is_logged;
+}
+
+void dp_trace_lt_result_update(struct dc_link *link,
+		enum link_training_result result,
+		bool in_detection)
+{
+	if (in_detection)
+		link->dp_trace.detect_lt_trace.result = result;
+	else
+		link->dp_trace.commit_lt_trace.result = result;
+}
+
+void dp_trace_set_lt_start_timestamp(struct dc_link *link,
+		bool in_detection)
+{
+	if (in_detection)
+		link->dp_trace.detect_lt_trace.timestamps.start = dm_get_timestamp(link->dc->ctx);
+	else
+		link->dp_trace.commit_lt_trace.timestamps.start = dm_get_timestamp(link->dc->ctx);
+}
+
+void dp_trace_set_lt_end_timestamp(struct dc_link *link,
+		bool in_detection)
+{
+	if (in_detection)
+		link->dp_trace.detect_lt_trace.timestamps.end = dm_get_timestamp(link->dc->ctx);
+	else
+		link->dp_trace.commit_lt_trace.timestamps.end = dm_get_timestamp(link->dc->ctx);
+}
+
+unsigned long long dp_trace_get_lt_end_timestamp(struct dc_link *link,
+		bool in_detection)
+{
+	if (in_detection)
+		return link->dp_trace.detect_lt_trace.timestamps.end;
+	else
+		return link->dp_trace.commit_lt_trace.timestamps.end;
+}
+
+const struct dp_trace_lt_counts *dp_trace_get_lt_counts(struct dc_link *link,
+		bool in_detection)
+{
+	if (in_detection)
+		return &link->dp_trace.detect_lt_trace.counts;
+	else
+		return &link->dp_trace.commit_lt_trace.counts;
+}
+
+unsigned int dp_trace_get_link_loss_count(struct dc_link *link)
+{
+	return link->dp_trace.link_loss_count;
+}
+
+void dp_trace_set_edp_power_timestamp(struct dc_link *link,
+		bool power_up)
+{
+	if (!power_up)
+		/*save driver power off time stamp*/
+		link->dp_trace.edp_trace_power_timestamps.poweroff = dm_get_timestamp(link->dc->ctx);
+	else
+		link->dp_trace.edp_trace_power_timestamps.poweron = dm_get_timestamp(link->dc->ctx);
+}
+
+uint64_t dp_trace_get_edp_poweron_timestamp(struct dc_link *link)
+{
+	return link->dp_trace.edp_trace_power_timestamps.poweron;
+}
+
+uint64_t dp_trace_get_edp_poweroff_timestamp(struct dc_link *link)
+{
+	return link->dp_trace.edp_trace_power_timestamps.poweroff;
+}
+
+void dp_trace_source_sequence(struct dc_link *link, uint8_t dp_test_mode)
+{
+	if (link != NULL && link->dc->debug.enable_driver_sequence_debug)
+		core_link_write_dpcd(link, DP_SOURCE_SEQUENCE,
+					&dp_test_mode, sizeof(dp_test_mode));
+}
diff --git a/drivers/gpu/drm/amd/display/dc/link/accessories/link_dp_trace.h b/drivers/gpu/drm/amd/display/dc/link/accessories/link_dp_trace.h
new file mode 100644
index 000000000..ab437a0c9
--- /dev/null
+++ b/drivers/gpu/drm/amd/display/dc/link/accessories/link_dp_trace.h
@@ -0,0 +1,63 @@
+/*
+ * Copyright 2022 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 __LINK_DP_TRACE_H__
+#define __LINK_DP_TRACE_H__
+#include "link.h"
+
+void dp_trace_init(struct dc_link *link);
+void dp_trace_reset(struct dc_link *link);
+bool dp_trace_is_initialized(struct dc_link *link);
+void dp_trace_detect_lt_init(struct dc_link *link);
+void dp_trace_commit_lt_init(struct dc_link *link);
+void dp_trace_link_loss_increment(struct dc_link *link);
+void dp_trace_lt_fail_count_update(struct dc_link *link,
+		unsigned int fail_count,
+		bool in_detection);
+void dp_trace_lt_total_count_increment(struct dc_link *link,
+		bool in_detection);
+void dp_trace_set_is_logged_flag(struct dc_link *link,
+		bool in_detection,
+		bool is_logged);
+bool dp_trace_is_logged(struct dc_link *link,
+		bool in_detection);
+void dp_trace_lt_result_update(struct dc_link *link,
+		enum link_training_result result,
+		bool in_detection);
+void dp_trace_set_lt_start_timestamp(struct dc_link *link,
+		bool in_detection);
+void dp_trace_set_lt_end_timestamp(struct dc_link *link,
+		bool in_detection);
+unsigned long long dp_trace_get_lt_end_timestamp(struct dc_link *link,
+		bool in_detection);
+const struct dp_trace_lt_counts *dp_trace_get_lt_counts(struct dc_link *link,
+		bool in_detection);
+unsigned int dp_trace_get_link_loss_count(struct dc_link *link);
+void dp_trace_set_edp_power_timestamp(struct dc_link *link,
+		bool power_up);
+uint64_t dp_trace_get_edp_poweron_timestamp(struct dc_link *link);
+uint64_t dp_trace_get_edp_poweroff_timestamp(struct dc_link *link);
+void dp_trace_source_sequence(struct dc_link *link, uint8_t dp_test_mode);
+
+#endif /* __LINK_DP_TRACE_H__ */
diff --git a/drivers/gpu/drm/amd/display/dc/link/accessories/link_fpga.c b/drivers/gpu/drm/amd/display/dc/link/accessories/link_fpga.c
new file mode 100644
index 000000000..d3cc604ee
--- /dev/null
+++ b/drivers/gpu/drm/amd/display/dc/link/accessories/link_fpga.c
@@ -0,0 +1,95 @@
+/*
+ * Copyright 2023 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 "link_fpga.h"
+#include "link/link_dpms.h"
+#include "dm_helpers.h"
+#include "link_hwss.h"
+#include "dccg.h"
+#include "resource.h"
+
+#define DC_LOGGER_INIT(logger)
+
+void dp_fpga_hpo_enable_link_and_stream(struct dc_state *state, struct pipe_ctx *pipe_ctx)
+{
+	struct dc *dc = pipe_ctx->stream->ctx->dc;
+	struct dc_stream_state *stream = pipe_ctx->stream;
+	struct link_mst_stream_allocation_table proposed_table = {0};
+	struct fixed31_32 avg_time_slots_per_mtp;
+	uint8_t req_slot_count = 0;
+	uint8_t vc_id = 1; /// VC ID always 1 for SST
+	struct dc_link_settings link_settings = pipe_ctx->link_config.dp_link_settings;
+	const struct link_hwss *link_hwss = get_link_hwss(stream->link, &pipe_ctx->link_res);
+	DC_LOGGER_INIT(pipe_ctx->stream->ctx->logger);
+
+	stream->link->cur_link_settings = link_settings;
+
+	if (link_hwss->ext.enable_dp_link_output)
+		link_hwss->ext.enable_dp_link_output(stream->link, &pipe_ctx->link_res,
+				stream->signal, pipe_ctx->clock_source->id,
+				&link_settings);
+
+	/* Enable DP_STREAM_ENC */
+	dc->hwss.enable_stream(pipe_ctx);
+
+	/* Set DPS PPS SDP (AKA "info frames") */
+	if (pipe_ctx->stream->timing.flags.DSC) {
+		link_set_dsc_pps_packet(pipe_ctx, true, true);
+	}
+
+	/* Allocate Payload */
+	if ((stream->signal == SIGNAL_TYPE_DISPLAY_PORT_MST) && (state->stream_count > 1)) {
+		// MST case
+		uint8_t i;
+
+		proposed_table.stream_count = state->stream_count;
+		for (i = 0; i < state->stream_count; i++) {
+			avg_time_slots_per_mtp = link_calculate_sst_avg_time_slots_per_mtp(state->streams[i], state->streams[i]->link);
+			req_slot_count = dc_fixpt_ceil(avg_time_slots_per_mtp);
+			proposed_table.stream_allocations[i].slot_count = req_slot_count;
+			proposed_table.stream_allocations[i].vcp_id = i+1;
+			/* NOTE: This makes assumption that pipe_ctx index is same as stream index */
+			proposed_table.stream_allocations[i].hpo_dp_stream_enc = state->res_ctx.pipe_ctx[i].stream_res.hpo_dp_stream_enc;
+		}
+	} else {
+		// SST case
+		avg_time_slots_per_mtp = link_calculate_sst_avg_time_slots_per_mtp(stream, stream->link);
+		req_slot_count = dc_fixpt_ceil(avg_time_slots_per_mtp);
+		proposed_table.stream_count = 1; /// Always 1 stream for SST
+		proposed_table.stream_allocations[0].slot_count = req_slot_count;
+		proposed_table.stream_allocations[0].vcp_id = vc_id;
+		proposed_table.stream_allocations[0].hpo_dp_stream_enc = pipe_ctx->stream_res.hpo_dp_stream_enc;
+	}
+
+	link_hwss->ext.update_stream_allocation_table(stream->link,
+			&pipe_ctx->link_res,
+			&proposed_table);
+
+	if (link_hwss->ext.set_throttled_vcp_size)
+		link_hwss->ext.set_throttled_vcp_size(pipe_ctx, avg_time_slots_per_mtp);
+
+	dc->hwss.unblank_stream(pipe_ctx, &stream->link->cur_link_settings);
+	dc->hwss.enable_audio_stream(pipe_ctx);
+}
+
diff --git a/drivers/gpu/drm/amd/display/dc/link/accessories/link_fpga.h b/drivers/gpu/drm/amd/display/dc/link/accessories/link_fpga.h
new file mode 100644
index 000000000..3a80f5595
--- /dev/null
+++ b/drivers/gpu/drm/amd/display/dc/link/accessories/link_fpga.h
@@ -0,0 +1,30 @@
+/*
+ * Copyright 2023 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 __LINK_FPGA_H__
+#define __LINK_FPGA_H__
+#include "link.h"
+void dp_fpga_hpo_enable_link_and_stream(struct dc_state *state,
+		struct pipe_ctx *pipe_ctx);
+#endif /* __LINK_FPGA_H__ */
diff --git a/drivers/gpu/drm/amd/display/dc/link/hwss/link_hwss_dio.c b/drivers/gpu/drm/amd/display/dc/link/hwss/link_hwss_dio.c
new file mode 100644
index 000000000..1328a0ade
--- /dev/null
+++ b/drivers/gpu/drm/amd/display/dc/link/hwss/link_hwss_dio.c
@@ -0,0 +1,256 @@
+/*
+ * Copyright 2022 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 "link_hwss_dio.h"
+#include "core_types.h"
+#include "link_enc_cfg.h"
+
+void set_dio_throttled_vcp_size(struct pipe_ctx *pipe_ctx,
+		struct fixed31_32 throttled_vcp_size)
+{
+	struct stream_encoder *stream_encoder = pipe_ctx->stream_res.stream_enc;
+
+	stream_encoder->funcs->set_throttled_vcp_size(
+				stream_encoder,
+				throttled_vcp_size);
+}
+
+void setup_dio_stream_encoder(struct pipe_ctx *pipe_ctx)
+{
+	struct link_encoder *link_enc = link_enc_cfg_get_link_enc(pipe_ctx->stream->link);
+	struct stream_encoder *stream_enc = pipe_ctx->stream_res.stream_enc;
+
+	link_enc->funcs->connect_dig_be_to_fe(link_enc,
+			pipe_ctx->stream_res.stream_enc->id, true);
+	if (dc_is_dp_signal(pipe_ctx->stream->signal))
+		pipe_ctx->stream->ctx->dc->link_srv->dp_trace_source_sequence(pipe_ctx->stream->link,
+				DPCD_SOURCE_SEQ_AFTER_CONNECT_DIG_FE_BE);
+	if (stream_enc->funcs->map_stream_to_link)
+		stream_enc->funcs->map_stream_to_link(stream_enc,
+				stream_enc->stream_enc_inst, link_enc->transmitter - TRANSMITTER_UNIPHY_A);
+	if (stream_enc->funcs->enable_fifo)
+		stream_enc->funcs->enable_fifo(stream_enc);
+}
+
+void reset_dio_stream_encoder(struct pipe_ctx *pipe_ctx)
+{
+	struct link_encoder *link_enc = link_enc_cfg_get_link_enc(pipe_ctx->stream->link);
+	struct stream_encoder *stream_enc = pipe_ctx->stream_res.stream_enc;
+
+	if (stream_enc && stream_enc->funcs->disable_fifo)
+		stream_enc->funcs->disable_fifo(stream_enc);
+
+	link_enc->funcs->connect_dig_be_to_fe(
+			link_enc,
+			pipe_ctx->stream_res.stream_enc->id,
+			false);
+	if (dc_is_dp_signal(pipe_ctx->stream->signal))
+		pipe_ctx->stream->ctx->dc->link_srv->dp_trace_source_sequence(
+				pipe_ctx->stream->link,
+				DPCD_SOURCE_SEQ_AFTER_DISCONNECT_DIG_FE_BE);
+
+}
+
+void setup_dio_stream_attribute(struct pipe_ctx *pipe_ctx)
+{
+	struct stream_encoder *stream_encoder = pipe_ctx->stream_res.stream_enc;
+	struct dc_stream_state *stream = pipe_ctx->stream;
+	struct dc_link *link = stream->link;
+
+	if (!dc_is_virtual_signal(stream->signal))
+		stream_encoder->funcs->setup_stereo_sync(
+				stream_encoder,
+				pipe_ctx->stream_res.tg->inst,
+				stream->timing.timing_3d_format != TIMING_3D_FORMAT_NONE);
+
+	if (dc_is_dp_signal(stream->signal))
+		stream_encoder->funcs->dp_set_stream_attribute(
+				stream_encoder,
+				&stream->timing,
+				stream->output_color_space,
+				stream->use_vsc_sdp_for_colorimetry,
+				link->dpcd_caps.dprx_feature.bits.SST_SPLIT_SDP_CAP);
+	else if (dc_is_hdmi_tmds_signal(stream->signal))
+		stream_encoder->funcs->hdmi_set_stream_attribute(
+				stream_encoder,
+				&stream->timing,
+				stream->phy_pix_clk,
+				pipe_ctx->stream_res.audio != NULL);
+	else if (dc_is_dvi_signal(stream->signal))
+		stream_encoder->funcs->dvi_set_stream_attribute(
+				stream_encoder,
+				&stream->timing,
+				(stream->signal == SIGNAL_TYPE_DVI_DUAL_LINK) ?
+						true : false);
+	else if (dc_is_lvds_signal(stream->signal))
+		stream_encoder->funcs->lvds_set_stream_attribute(
+				stream_encoder,
+				&stream->timing);
+
+	if (dc_is_dp_signal(stream->signal))
+		link->dc->link_srv->dp_trace_source_sequence(link,
+				DPCD_SOURCE_SEQ_AFTER_DP_STREAM_ATTR);
+}
+
+void enable_dio_dp_link_output(struct dc_link *link,
+		const struct link_resource *link_res,
+		enum signal_type signal,
+		enum clock_source_id clock_source,
+		const struct dc_link_settings *link_settings)
+{
+	struct link_encoder *link_enc = link_enc_cfg_get_link_enc(link);
+
+	if (dc_is_dp_sst_signal(signal))
+		link_enc->funcs->enable_dp_output(
+				link_enc,
+				link_settings,
+				clock_source);
+	else
+		link_enc->funcs->enable_dp_mst_output(
+				link_enc,
+				link_settings,
+				clock_source);
+	link->dc->link_srv->dp_trace_source_sequence(link,
+			DPCD_SOURCE_SEQ_AFTER_ENABLE_LINK_PHY);
+}
+
+void disable_dio_link_output(struct dc_link *link,
+		const struct link_resource *link_res,
+		enum signal_type signal)
+{
+	struct link_encoder *link_enc = link_enc_cfg_get_link_enc(link);
+
+	link_enc->funcs->disable_output(link_enc, signal);
+	link->dc->link_srv->dp_trace_source_sequence(link,
+			DPCD_SOURCE_SEQ_AFTER_DISABLE_LINK_PHY);
+}
+
+void set_dio_dp_link_test_pattern(struct dc_link *link,
+		const struct link_resource *link_res,
+		struct encoder_set_dp_phy_pattern_param *tp_params)
+{
+	struct link_encoder *link_enc = link_enc_cfg_get_link_enc(link);
+
+	link_enc->funcs->dp_set_phy_pattern(link_enc, tp_params);
+	link->dc->link_srv->dp_trace_source_sequence(link, DPCD_SOURCE_SEQ_AFTER_SET_SOURCE_PATTERN);
+}
+
+void set_dio_dp_lane_settings(struct dc_link *link,
+		const struct link_resource *link_res,
+		const struct dc_link_settings *link_settings,
+		const struct dc_lane_settings lane_settings[LANE_COUNT_DP_MAX])
+{
+	struct link_encoder *link_enc = link_enc_cfg_get_link_enc(link);
+
+	link_enc->funcs->dp_set_lane_settings(link_enc, link_settings, lane_settings);
+}
+
+void update_dio_stream_allocation_table(struct dc_link *link,
+		const struct link_resource *link_res,
+		const struct link_mst_stream_allocation_table *table)
+{
+	struct link_encoder *link_enc = link_enc_cfg_get_link_enc(link);
+
+	ASSERT(link_enc);
+	link_enc->funcs->update_mst_stream_allocation_table(link_enc, table);
+}
+
+void setup_dio_audio_output(struct pipe_ctx *pipe_ctx,
+		struct audio_output *audio_output, uint32_t audio_inst)
+{
+	if (dc_is_dp_signal(pipe_ctx->stream->signal))
+		pipe_ctx->stream_res.stream_enc->funcs->dp_audio_setup(
+				pipe_ctx->stream_res.stream_enc,
+				audio_inst,
+				&pipe_ctx->stream->audio_info);
+	else
+		pipe_ctx->stream_res.stream_enc->funcs->hdmi_audio_setup(
+				pipe_ctx->stream_res.stream_enc,
+				audio_inst,
+				&pipe_ctx->stream->audio_info,
+				&audio_output->crtc_info);
+}
+
+void enable_dio_audio_packet(struct pipe_ctx *pipe_ctx)
+{
+	if (dc_is_dp_signal(pipe_ctx->stream->signal))
+		pipe_ctx->stream_res.stream_enc->funcs->dp_audio_enable(
+				pipe_ctx->stream_res.stream_enc);
+
+	pipe_ctx->stream_res.stream_enc->funcs->audio_mute_control(
+			pipe_ctx->stream_res.stream_enc, false);
+
+	if (dc_is_dp_signal(pipe_ctx->stream->signal))
+		pipe_ctx->stream->ctx->dc->link_srv->dp_trace_source_sequence(
+				pipe_ctx->stream->link,
+				DPCD_SOURCE_SEQ_AFTER_ENABLE_AUDIO_STREAM);
+}
+
+void disable_dio_audio_packet(struct pipe_ctx *pipe_ctx)
+{
+	pipe_ctx->stream_res.stream_enc->funcs->audio_mute_control(
+			pipe_ctx->stream_res.stream_enc, true);
+
+	if (pipe_ctx->stream_res.audio) {
+		if (dc_is_dp_signal(pipe_ctx->stream->signal))
+			pipe_ctx->stream_res.stream_enc->funcs->dp_audio_disable(
+					pipe_ctx->stream_res.stream_enc);
+		else
+			pipe_ctx->stream_res.stream_enc->funcs->hdmi_audio_disable(
+					pipe_ctx->stream_res.stream_enc);
+	}
+
+	if (dc_is_dp_signal(pipe_ctx->stream->signal))
+		pipe_ctx->stream->ctx->dc->link_srv->dp_trace_source_sequence(
+				pipe_ctx->stream->link,
+				DPCD_SOURCE_SEQ_AFTER_DISABLE_AUDIO_STREAM);
+}
+
+static const struct link_hwss dio_link_hwss = {
+	.setup_stream_encoder = setup_dio_stream_encoder,
+	.reset_stream_encoder = reset_dio_stream_encoder,
+	.setup_stream_attribute = setup_dio_stream_attribute,
+	.disable_link_output = disable_dio_link_output,
+	.setup_audio_output = setup_dio_audio_output,
+	.enable_audio_packet = enable_dio_audio_packet,
+	.disable_audio_packet = disable_dio_audio_packet,
+	.ext = {
+		.set_throttled_vcp_size = set_dio_throttled_vcp_size,
+		.enable_dp_link_output = enable_dio_dp_link_output,
+		.set_dp_link_test_pattern = set_dio_dp_link_test_pattern,
+		.set_dp_lane_settings = set_dio_dp_lane_settings,
+		.update_stream_allocation_table = update_dio_stream_allocation_table,
+	},
+};
+
+bool can_use_dio_link_hwss(const struct dc_link *link,
+		const struct link_resource *link_res)
+{
+	return link->link_enc != NULL;
+}
+
+const struct link_hwss *get_dio_link_hwss(void)
+{
+	return &dio_link_hwss;
+}
diff --git a/drivers/gpu/drm/amd/display/dc/link/hwss/link_hwss_dio.h b/drivers/gpu/drm/amd/display/dc/link/hwss/link_hwss_dio.h
new file mode 100644
index 000000000..f4633d3cf
--- /dev/null
+++ b/drivers/gpu/drm/amd/display/dc/link/hwss/link_hwss_dio.h
@@ -0,0 +1,62 @@
+/*
+ * Copyright 2022 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 __LINK_HWSS_DIO_H__
+#define __LINK_HWSS_DIO_H__
+
+#include "link_hwss.h"
+#include "link.h"
+
+const struct link_hwss *get_dio_link_hwss(void);
+bool can_use_dio_link_hwss(const struct dc_link *link,
+		const struct link_resource *link_res);
+void set_dio_throttled_vcp_size(struct pipe_ctx *pipe_ctx,
+		struct fixed31_32 throttled_vcp_size);
+void setup_dio_stream_encoder(struct pipe_ctx *pipe_ctx);
+void reset_dio_stream_encoder(struct pipe_ctx *pipe_ctx);
+void setup_dio_stream_attribute(struct pipe_ctx *pipe_ctx);
+void enable_dio_dp_link_output(struct dc_link *link,
+		const struct link_resource *link_res,
+		enum signal_type signal,
+		enum clock_source_id clock_source,
+		const struct dc_link_settings *link_settings);
+void disable_dio_link_output(struct dc_link *link,
+		const struct link_resource *link_res,
+		enum signal_type signal);
+void set_dio_dp_link_test_pattern(struct dc_link *link,
+		const struct link_resource *link_res,
+		struct encoder_set_dp_phy_pattern_param *tp_params);
+void set_dio_dp_lane_settings(struct dc_link *link,
+		const struct link_resource *link_res,
+		const struct dc_link_settings *link_settings,
+		const struct dc_lane_settings lane_settings[LANE_COUNT_DP_MAX]);
+void setup_dio_audio_output(struct pipe_ctx *pipe_ctx,
+		struct audio_output *audio_output, uint32_t audio_inst);
+void enable_dio_audio_packet(struct pipe_ctx *pipe_ctx);
+void disable_dio_audio_packet(struct pipe_ctx *pipe_ctx);
+void update_dio_stream_allocation_table(struct dc_link *link,
+		const struct link_resource *link_res,
+		const struct link_mst_stream_allocation_table *table);
+
+#endif /* __LINK_HWSS_DIO_H__ */
diff --git a/drivers/gpu/drm/amd/display/dc/link/hwss/link_hwss_dio_fixed_vs_pe_retimer.c b/drivers/gpu/drm/amd/display/dc/link/hwss/link_hwss_dio_fixed_vs_pe_retimer.c
new file mode 100644
index 000000000..b659baa23
--- /dev/null
+++ b/drivers/gpu/drm/amd/display/dc/link/hwss/link_hwss_dio_fixed_vs_pe_retimer.c
@@ -0,0 +1,200 @@
+/*
+ * Copyright 2023 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 "link_hwss_dio.h"
+#include "link_hwss_dio_fixed_vs_pe_retimer.h"
+#include "link_enc_cfg.h"
+
+uint8_t dp_dio_fixed_vs_pe_retimer_lane_cfg_to_hw_cfg(struct dc_link *link)
+{
+	// TODO: Get USB-C cable orientation
+	if (link->cur_link_settings.lane_count == LANE_COUNT_FOUR)
+		return 0xF2;
+	else
+		return 0x12;
+}
+
+void dp_dio_fixed_vs_pe_retimer_exit_manual_automation(struct dc_link *link)
+{
+	const uint8_t dp_type = dp_dio_fixed_vs_pe_retimer_lane_cfg_to_hw_cfg(link);
+	const uint8_t vendor_lttpr_exit_manual_automation_0[4] = {0x1, 0x11, 0x0, 0x06};
+	const uint8_t vendor_lttpr_exit_manual_automation_1[4] = {0x1, 0x50, dp_type, 0x0};
+	const uint8_t vendor_lttpr_exit_manual_automation_2[4] = {0x1, 0x50, 0x50, 0x0};
+	const uint8_t vendor_lttpr_exit_manual_automation_3[4] = {0x1, 0x51, 0x50, 0x0};
+	const uint8_t vendor_lttpr_exit_manual_automation_4[4] = {0x1, 0x10, 0x58, 0x0};
+	const uint8_t vendor_lttpr_exit_manual_automation_5[4] = {0x1, 0x10, 0x59, 0x0};
+	const uint8_t vendor_lttpr_exit_manual_automation_6[4] = {0x1, 0x30, 0x51, 0x0};
+	const uint8_t vendor_lttpr_exit_manual_automation_7[4] = {0x1, 0x30, 0x52, 0x0};
+	const uint8_t vendor_lttpr_exit_manual_automation_8[4] = {0x1, 0x30, 0x54, 0x0};
+	const uint8_t vendor_lttpr_exit_manual_automation_9[4] = {0x1, 0x30, 0x55, 0x0};
+
+	link->dc->link_srv->configure_fixed_vs_pe_retimer(link->ddc,
+			&vendor_lttpr_exit_manual_automation_0[0], sizeof(vendor_lttpr_exit_manual_automation_0));
+	link->dc->link_srv->configure_fixed_vs_pe_retimer(link->ddc,
+			&vendor_lttpr_exit_manual_automation_1[0], sizeof(vendor_lttpr_exit_manual_automation_1));
+	link->dc->link_srv->configure_fixed_vs_pe_retimer(link->ddc,
+			&vendor_lttpr_exit_manual_automation_2[0], sizeof(vendor_lttpr_exit_manual_automation_2));
+	link->dc->link_srv->configure_fixed_vs_pe_retimer(link->ddc,
+			&vendor_lttpr_exit_manual_automation_3[0], sizeof(vendor_lttpr_exit_manual_automation_3));
+	link->dc->link_srv->configure_fixed_vs_pe_retimer(link->ddc,
+			&vendor_lttpr_exit_manual_automation_4[0], sizeof(vendor_lttpr_exit_manual_automation_4));
+	link->dc->link_srv->configure_fixed_vs_pe_retimer(link->ddc,
+			&vendor_lttpr_exit_manual_automation_5[0], sizeof(vendor_lttpr_exit_manual_automation_5));
+	link->dc->link_srv->configure_fixed_vs_pe_retimer(link->ddc,
+			&vendor_lttpr_exit_manual_automation_6[0], sizeof(vendor_lttpr_exit_manual_automation_6));
+	link->dc->link_srv->configure_fixed_vs_pe_retimer(link->ddc,
+			&vendor_lttpr_exit_manual_automation_7[0], sizeof(vendor_lttpr_exit_manual_automation_7));
+	link->dc->link_srv->configure_fixed_vs_pe_retimer(link->ddc,
+			&vendor_lttpr_exit_manual_automation_8[0], sizeof(vendor_lttpr_exit_manual_automation_8));
+	link->dc->link_srv->configure_fixed_vs_pe_retimer(link->ddc,
+			&vendor_lttpr_exit_manual_automation_9[0], sizeof(vendor_lttpr_exit_manual_automation_9));
+}
+
+static bool set_dio_fixed_vs_pe_retimer_dp_link_test_pattern_override(struct dc_link *link,
+		const struct link_resource *link_res, struct encoder_set_dp_phy_pattern_param *tp_params,
+		const struct link_hwss *link_hwss)
+{
+	struct encoder_set_dp_phy_pattern_param hw_tp_params = { 0 };
+	const uint8_t pltpat_custom[10] = {0x1F, 0x7C, 0xF0, 0xC1, 0x07, 0x1F, 0x7C, 0xF0, 0xC1, 0x07};
+	const uint8_t vendor_lttpr_write_data_pg0[4] = {0x1, 0x11, 0x0, 0x0};
+	const uint8_t vendor_lttpr_exit_manual_automation_0[4] = {0x1, 0x11, 0x0, 0x06};
+
+
+	if (tp_params == NULL)
+		return false;
+
+	if (link->current_test_pattern >= DP_TEST_PATTERN_SQUARE_BEGIN &&
+			link->current_test_pattern <= DP_TEST_PATTERN_SQUARE_END) {
+		// Deprogram overrides from previous test pattern
+		dp_dio_fixed_vs_pe_retimer_exit_manual_automation(link);
+	}
+
+	switch (tp_params->dp_phy_pattern) {
+	case DP_TEST_PATTERN_80BIT_CUSTOM:
+		if (tp_params->custom_pattern_size == 0 || memcmp(tp_params->custom_pattern,
+				pltpat_custom, tp_params->custom_pattern_size) != 0)
+			return false;
+		break;
+	case DP_TEST_PATTERN_D102:
+		break;
+	default:
+		if (link->current_test_pattern == DP_TEST_PATTERN_80BIT_CUSTOM ||
+				link->current_test_pattern == DP_TEST_PATTERN_D102)
+			// Deprogram overrides from previous test pattern
+			link->dc->link_srv->configure_fixed_vs_pe_retimer(link->ddc,
+					&vendor_lttpr_exit_manual_automation_0[0],
+					sizeof(vendor_lttpr_exit_manual_automation_0));
+
+		return false;
+	}
+
+	hw_tp_params.dp_phy_pattern = tp_params->dp_phy_pattern;
+	hw_tp_params.dp_panel_mode = tp_params->dp_panel_mode;
+
+	if (link_hwss->ext.set_dp_link_test_pattern)
+		link_hwss->ext.set_dp_link_test_pattern(link, link_res, &hw_tp_params);
+
+	link->dc->link_srv->configure_fixed_vs_pe_retimer(link->ddc,
+			&vendor_lttpr_write_data_pg0[0], sizeof(vendor_lttpr_write_data_pg0));
+
+	return true;
+}
+
+static void set_dio_fixed_vs_pe_retimer_dp_link_test_pattern(struct dc_link *link,
+		const struct link_resource *link_res,
+		struct encoder_set_dp_phy_pattern_param *tp_params)
+{
+	struct link_encoder *link_enc = link_enc_cfg_get_link_enc(link);
+
+	if (!set_dio_fixed_vs_pe_retimer_dp_link_test_pattern_override(
+			link, link_res, tp_params, get_dio_link_hwss())) {
+		link_enc->funcs->dp_set_phy_pattern(link_enc, tp_params);
+	}
+	link->dc->link_srv->dp_trace_source_sequence(link, DPCD_SOURCE_SEQ_AFTER_SET_SOURCE_PATTERN);
+}
+
+void enable_dio_fixed_vs_pe_retimer_program_4lane_output(struct dc_link *link)
+{
+	const uint8_t vendor_lttpr_write_data_4lane_1[4] = {0x1, 0x6E, 0xF2, 0x19};
+	const uint8_t vendor_lttpr_write_data_4lane_2[4] = {0x1, 0x6B, 0xF2, 0x01};
+	const uint8_t vendor_lttpr_write_data_4lane_3[4] = {0x1, 0x6D, 0xF2, 0x18};
+	const uint8_t vendor_lttpr_write_data_4lane_4[4] = {0x1, 0x6C, 0xF2, 0x03};
+	const uint8_t vendor_lttpr_write_data_4lane_5[4] = {0x1, 0x03, 0xF3, 0x06};
+
+	link->dc->link_srv->configure_fixed_vs_pe_retimer(link->ddc,
+			&vendor_lttpr_write_data_4lane_1[0], sizeof(vendor_lttpr_write_data_4lane_1));
+	link->dc->link_srv->configure_fixed_vs_pe_retimer(link->ddc,
+			&vendor_lttpr_write_data_4lane_2[0], sizeof(vendor_lttpr_write_data_4lane_2));
+	link->dc->link_srv->configure_fixed_vs_pe_retimer(link->ddc,
+			&vendor_lttpr_write_data_4lane_3[0], sizeof(vendor_lttpr_write_data_4lane_3));
+	link->dc->link_srv->configure_fixed_vs_pe_retimer(link->ddc,
+			&vendor_lttpr_write_data_4lane_4[0], sizeof(vendor_lttpr_write_data_4lane_4));
+	link->dc->link_srv->configure_fixed_vs_pe_retimer(link->ddc,
+			&vendor_lttpr_write_data_4lane_5[0], sizeof(vendor_lttpr_write_data_4lane_5));
+}
+
+static void enable_dio_fixed_vs_pe_retimer_dp_link_output(struct dc_link *link,
+		const struct link_resource *link_res,
+		enum signal_type signal,
+		enum clock_source_id clock_source,
+		const struct dc_link_settings *link_settings)
+{
+	if (link_settings->lane_count == LANE_COUNT_FOUR)
+		enable_dio_fixed_vs_pe_retimer_program_4lane_output(link);
+
+	enable_dio_dp_link_output(link, link_res, signal, clock_source, link_settings);
+}
+
+static const struct link_hwss dio_fixed_vs_pe_retimer_link_hwss = {
+	.setup_stream_encoder = setup_dio_stream_encoder,
+	.reset_stream_encoder = reset_dio_stream_encoder,
+	.setup_stream_attribute = setup_dio_stream_attribute,
+	.disable_link_output = disable_dio_link_output,
+	.setup_audio_output = setup_dio_audio_output,
+	.enable_audio_packet = enable_dio_audio_packet,
+	.disable_audio_packet = disable_dio_audio_packet,
+	.ext = {
+		.set_throttled_vcp_size = set_dio_throttled_vcp_size,
+		.enable_dp_link_output = enable_dio_fixed_vs_pe_retimer_dp_link_output,
+		.set_dp_link_test_pattern = set_dio_fixed_vs_pe_retimer_dp_link_test_pattern,
+		.set_dp_lane_settings = set_dio_dp_lane_settings,
+		.update_stream_allocation_table = update_dio_stream_allocation_table,
+	},
+};
+
+bool requires_fixed_vs_pe_retimer_dio_link_hwss(const struct dc_link *link)
+{
+	if (!(link->chip_caps & EXT_DISPLAY_PATH_CAPS__DP_FIXED_VS_EN))
+		return false;
+
+	if (!link->dpcd_caps.lttpr_caps.main_link_channel_coding.bits.DP_128b_132b_SUPPORTED)
+		return false;
+
+	return true;
+}
+
+const struct link_hwss *get_dio_fixed_vs_pe_retimer_link_hwss(void)
+{
+	return &dio_fixed_vs_pe_retimer_link_hwss;
+}
diff --git a/drivers/gpu/drm/amd/display/dc/link/hwss/link_hwss_dio_fixed_vs_pe_retimer.h b/drivers/gpu/drm/amd/display/dc/link/hwss/link_hwss_dio_fixed_vs_pe_retimer.h
new file mode 100644
index 000000000..9ac08a332
--- /dev/null
+++ b/drivers/gpu/drm/amd/display/dc/link/hwss/link_hwss_dio_fixed_vs_pe_retimer.h
@@ -0,0 +1,37 @@
+/*
+ * Copyright 2023 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 __LINK_HWSS_DIO_FIXED_VS_PE_RETIMER_H__
+#define __LINK_HWSS_DIO_FIXED_VS_PE_RETIMER_H__
+
+#include "link.h"
+
+uint32_t dp_dio_fixed_vs_pe_retimer_get_lttpr_write_address(struct dc_link *link);
+uint8_t dp_dio_fixed_vs_pe_retimer_lane_cfg_to_hw_cfg(struct dc_link *link);
+void dp_dio_fixed_vs_pe_retimer_exit_manual_automation(struct dc_link *link);
+void enable_dio_fixed_vs_pe_retimer_program_4lane_output(struct dc_link *link);
+bool requires_fixed_vs_pe_retimer_dio_link_hwss(const struct dc_link *link);
+const struct link_hwss *get_dio_fixed_vs_pe_retimer_link_hwss(void);
+
+#endif /* __LINK_HWSS_DIO_FIXED_VS_PE_RETIMER_H__ */
diff --git a/drivers/gpu/drm/amd/display/dc/link/hwss/link_hwss_dpia.c b/drivers/gpu/drm/amd/display/dc/link/hwss/link_hwss_dpia.c
new file mode 100644
index 000000000..861f3cd5b
--- /dev/null
+++ b/drivers/gpu/drm/amd/display/dc/link/hwss/link_hwss_dpia.c
@@ -0,0 +1,82 @@
+/*
+ * Copyright 2022 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 "link_hwss_dpia.h"
+#include "core_types.h"
+#include "link_hwss_dio.h"
+#include "link_enc_cfg.h"
+
+#define DC_LOGGER_INIT(logger)
+
+static void update_dpia_stream_allocation_table(struct dc_link *link,
+		const struct link_resource *link_res,
+		const struct link_mst_stream_allocation_table *table)
+{
+	struct link_encoder *link_enc = link_enc_cfg_get_link_enc(link);
+	static enum dc_status status;
+	uint8_t mst_alloc_slots = 0, prev_mst_slots_in_use = 0xFF;
+	int i;
+	DC_LOGGER_INIT(link->ctx->logger);
+
+	for (i = 0; i < table->stream_count; i++)
+		mst_alloc_slots += table->stream_allocations[i].slot_count;
+
+	status = dc_process_dmub_set_mst_slots(link->dc, link->link_index,
+			mst_alloc_slots, &prev_mst_slots_in_use);
+	ASSERT(status == DC_OK);
+	DC_LOG_MST("dpia : status[%d]: alloc_slots[%d]: used_slots[%d]\n",
+			status, mst_alloc_slots, prev_mst_slots_in_use);
+
+	ASSERT(link_enc);
+	link_enc->funcs->update_mst_stream_allocation_table(link_enc, table);
+}
+
+static const struct link_hwss dpia_link_hwss = {
+	.setup_stream_encoder = setup_dio_stream_encoder,
+	.reset_stream_encoder = reset_dio_stream_encoder,
+	.setup_stream_attribute = setup_dio_stream_attribute,
+	.disable_link_output = disable_dio_link_output,
+	.setup_audio_output = setup_dio_audio_output,
+	.enable_audio_packet = enable_dio_audio_packet,
+	.disable_audio_packet = disable_dio_audio_packet,
+	.ext = {
+		.set_throttled_vcp_size = set_dio_throttled_vcp_size,
+		.enable_dp_link_output = enable_dio_dp_link_output,
+		.set_dp_link_test_pattern = set_dio_dp_link_test_pattern,
+		.set_dp_lane_settings = set_dio_dp_lane_settings,
+		.update_stream_allocation_table = update_dpia_stream_allocation_table,
+	},
+};
+
+bool can_use_dpia_link_hwss(const struct dc_link *link,
+		const struct link_resource *link_res)
+{
+	return link->is_dig_mapping_flexible &&
+			link->dc->res_pool->funcs->link_encs_assign;
+}
+
+const struct link_hwss *get_dpia_link_hwss(void)
+{
+	return &dpia_link_hwss;
+}
diff --git a/drivers/gpu/drm/amd/display/dc/link/hwss/link_hwss_dpia.h b/drivers/gpu/drm/amd/display/dc/link/hwss/link_hwss_dpia.h
new file mode 100644
index 000000000..ad16ec5d9
--- /dev/null
+++ b/drivers/gpu/drm/amd/display/dc/link/hwss/link_hwss_dpia.h
@@ -0,0 +1,34 @@
+/*
+ * Copyright 2022 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 __LINK_HWSS_DPIA_H__
+#define __LINK_HWSS_DPIA_H__
+
+#include "link_hwss.h"
+
+const struct link_hwss *get_dpia_link_hwss(void);
+bool can_use_dpia_link_hwss(const struct dc_link *link,
+		const struct link_resource *link_res);
+
+#endif /* __LINK_HWSS_DPIA_H__ */
diff --git a/drivers/gpu/drm/amd/display/dc/link/hwss/link_hwss_hpo_dp.c b/drivers/gpu/drm/amd/display/dc/link/hwss/link_hwss_hpo_dp.c
new file mode 100644
index 000000000..e12574043
--- /dev/null
+++ b/drivers/gpu/drm/amd/display/dc/link/hwss/link_hwss_hpo_dp.c
@@ -0,0 +1,216 @@
+/*
+ * Copyright 2022 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 "link_hwss_hpo_dp.h"
+#include "dm_helpers.h"
+#include "core_types.h"
+#include "dccg.h"
+#include "clk_mgr.h"
+
+void set_hpo_dp_throttled_vcp_size(struct pipe_ctx *pipe_ctx,
+		struct fixed31_32 throttled_vcp_size)
+{
+	struct hpo_dp_stream_encoder *hpo_dp_stream_encoder =
+			pipe_ctx->stream_res.hpo_dp_stream_enc;
+	struct hpo_dp_link_encoder *hpo_dp_link_encoder =
+			pipe_ctx->link_res.hpo_dp_link_enc;
+
+	hpo_dp_link_encoder->funcs->set_throttled_vcp_size(hpo_dp_link_encoder,
+			hpo_dp_stream_encoder->inst,
+			throttled_vcp_size);
+}
+
+void set_hpo_dp_hblank_min_symbol_width(struct pipe_ctx *pipe_ctx,
+		const struct dc_link_settings *link_settings,
+		struct fixed31_32 throttled_vcp_size)
+{
+	struct hpo_dp_stream_encoder *hpo_dp_stream_encoder =
+			pipe_ctx->stream_res.hpo_dp_stream_enc;
+	struct dc_crtc_timing *timing = &pipe_ctx->stream->timing;
+	struct fixed31_32 h_blank_in_ms, time_slot_in_ms, mtp_cnt_per_h_blank;
+	uint32_t link_bw_in_kbps =
+			hpo_dp_stream_encoder->ctx->dc->link_srv->dp_link_bandwidth_kbps(
+					pipe_ctx->stream->link, link_settings);
+	uint16_t hblank_min_symbol_width = 0;
+
+	if (link_bw_in_kbps > 0) {
+		h_blank_in_ms = dc_fixpt_div(dc_fixpt_from_int(
+				timing->h_total - timing->h_addressable),
+				dc_fixpt_from_fraction(timing->pix_clk_100hz, 10));
+		time_slot_in_ms = dc_fixpt_from_fraction(32 * 4, link_bw_in_kbps);
+		mtp_cnt_per_h_blank = dc_fixpt_div(h_blank_in_ms,
+				dc_fixpt_mul_int(time_slot_in_ms, 64));
+		hblank_min_symbol_width = dc_fixpt_floor(
+				dc_fixpt_mul(mtp_cnt_per_h_blank, throttled_vcp_size));
+	}
+
+	hpo_dp_stream_encoder->funcs->set_hblank_min_symbol_width(hpo_dp_stream_encoder,
+			hblank_min_symbol_width);
+}
+
+void setup_hpo_dp_stream_encoder(struct pipe_ctx *pipe_ctx)
+{
+	struct hpo_dp_stream_encoder *stream_enc = pipe_ctx->stream_res.hpo_dp_stream_enc;
+	struct hpo_dp_link_encoder *link_enc = pipe_ctx->link_res.hpo_dp_link_enc;
+
+	stream_enc->funcs->enable_stream(stream_enc);
+	stream_enc->funcs->map_stream_to_link(stream_enc, stream_enc->inst, link_enc->inst);
+}
+
+void reset_hpo_dp_stream_encoder(struct pipe_ctx *pipe_ctx)
+{
+	struct hpo_dp_stream_encoder *stream_enc = pipe_ctx->stream_res.hpo_dp_stream_enc;
+
+	stream_enc->funcs->disable(stream_enc);
+}
+
+void setup_hpo_dp_stream_attribute(struct pipe_ctx *pipe_ctx)
+{
+	struct hpo_dp_stream_encoder *stream_enc = pipe_ctx->stream_res.hpo_dp_stream_enc;
+	struct dc_stream_state *stream = pipe_ctx->stream;
+	struct dc_link *link = stream->link;
+
+	stream_enc->funcs->set_stream_attribute(
+			stream_enc,
+			&stream->timing,
+			stream->output_color_space,
+			stream->use_vsc_sdp_for_colorimetry,
+			stream->timing.flags.DSC,
+			false);
+	link->dc->link_srv->dp_trace_source_sequence(link,
+			DPCD_SOURCE_SEQ_AFTER_DP_STREAM_ATTR);
+}
+
+void enable_hpo_dp_link_output(struct dc_link *link,
+		const struct link_resource *link_res,
+		enum signal_type signal,
+		enum clock_source_id clock_source,
+		const struct dc_link_settings *link_settings)
+{
+	if (link->dc->res_pool->dccg->funcs->set_symclk32_le_root_clock_gating)
+		link->dc->res_pool->dccg->funcs->set_symclk32_le_root_clock_gating(
+				link->dc->res_pool->dccg,
+				link_res->hpo_dp_link_enc->inst,
+				true);
+	link_res->hpo_dp_link_enc->funcs->enable_link_phy(
+			link_res->hpo_dp_link_enc,
+			link_settings,
+			link->link_enc->transmitter,
+			link->link_enc->hpd_source);
+}
+
+void disable_hpo_dp_link_output(struct dc_link *link,
+		const struct link_resource *link_res,
+		enum signal_type signal)
+{
+		link_res->hpo_dp_link_enc->funcs->link_disable(link_res->hpo_dp_link_enc);
+		link_res->hpo_dp_link_enc->funcs->disable_link_phy(
+				link_res->hpo_dp_link_enc, signal);
+		if (link->dc->res_pool->dccg->funcs->set_symclk32_le_root_clock_gating)
+			link->dc->res_pool->dccg->funcs->set_symclk32_le_root_clock_gating(
+					link->dc->res_pool->dccg,
+					link_res->hpo_dp_link_enc->inst,
+					false);
+}
+
+static void set_hpo_dp_link_test_pattern(struct dc_link *link,
+		const struct link_resource *link_res,
+		struct encoder_set_dp_phy_pattern_param *tp_params)
+{
+	link_res->hpo_dp_link_enc->funcs->set_link_test_pattern(
+			link_res->hpo_dp_link_enc, tp_params);
+	link->dc->link_srv->dp_trace_source_sequence(link, DPCD_SOURCE_SEQ_AFTER_SET_SOURCE_PATTERN);
+}
+
+static void set_hpo_dp_lane_settings(struct dc_link *link,
+		const struct link_resource *link_res,
+		const struct dc_link_settings *link_settings,
+		const struct dc_lane_settings lane_settings[LANE_COUNT_DP_MAX])
+{
+	link_res->hpo_dp_link_enc->funcs->set_ffe(
+			link_res->hpo_dp_link_enc,
+			link_settings,
+			lane_settings[0].FFE_PRESET.raw);
+}
+
+void update_hpo_dp_stream_allocation_table(struct dc_link *link,
+		const struct link_resource *link_res,
+		const struct link_mst_stream_allocation_table *table)
+{
+	link_res->hpo_dp_link_enc->funcs->update_stream_allocation_table(
+			link_res->hpo_dp_link_enc,
+			table);
+}
+
+void setup_hpo_dp_audio_output(struct pipe_ctx *pipe_ctx,
+		struct audio_output *audio_output, uint32_t audio_inst)
+{
+	pipe_ctx->stream_res.hpo_dp_stream_enc->funcs->dp_audio_setup(
+			pipe_ctx->stream_res.hpo_dp_stream_enc,
+			audio_inst,
+			&pipe_ctx->stream->audio_info);
+}
+
+void enable_hpo_dp_audio_packet(struct pipe_ctx *pipe_ctx)
+{
+	pipe_ctx->stream_res.hpo_dp_stream_enc->funcs->dp_audio_enable(
+			pipe_ctx->stream_res.hpo_dp_stream_enc);
+}
+
+void disable_hpo_dp_audio_packet(struct pipe_ctx *pipe_ctx)
+{
+	if (pipe_ctx->stream_res.audio)
+		pipe_ctx->stream_res.hpo_dp_stream_enc->funcs->dp_audio_disable(
+				pipe_ctx->stream_res.hpo_dp_stream_enc);
+}
+
+static const struct link_hwss hpo_dp_link_hwss = {
+	.setup_stream_encoder = setup_hpo_dp_stream_encoder,
+	.reset_stream_encoder = reset_hpo_dp_stream_encoder,
+	.setup_stream_attribute = setup_hpo_dp_stream_attribute,
+	.disable_link_output = disable_hpo_dp_link_output,
+	.setup_audio_output = setup_hpo_dp_audio_output,
+	.enable_audio_packet = enable_hpo_dp_audio_packet,
+	.disable_audio_packet = disable_hpo_dp_audio_packet,
+	.ext = {
+		.set_throttled_vcp_size = set_hpo_dp_throttled_vcp_size,
+		.set_hblank_min_symbol_width = set_hpo_dp_hblank_min_symbol_width,
+		.enable_dp_link_output = enable_hpo_dp_link_output,
+		.set_dp_link_test_pattern  = set_hpo_dp_link_test_pattern,
+		.set_dp_lane_settings = set_hpo_dp_lane_settings,
+		.update_stream_allocation_table = update_hpo_dp_stream_allocation_table,
+	},
+};
+
+bool can_use_hpo_dp_link_hwss(const struct dc_link *link,
+		const struct link_resource *link_res)
+{
+	return link_res->hpo_dp_link_enc != NULL;
+}
+
+const struct link_hwss *get_hpo_dp_link_hwss(void)
+{
+	return &hpo_dp_link_hwss;
+}
+
diff --git a/drivers/gpu/drm/amd/display/dc/link/hwss/link_hwss_hpo_dp.h b/drivers/gpu/drm/amd/display/dc/link/hwss/link_hwss_hpo_dp.h
new file mode 100644
index 000000000..1d3ed8ca8
--- /dev/null
+++ b/drivers/gpu/drm/amd/display/dc/link/hwss/link_hwss_hpo_dp.h
@@ -0,0 +1,62 @@
+/*
+ * Copyright 2022 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 __LINK_HWSS_HPO_DP_H__
+#define __LINK_HWSS_HPO_DP_H__
+
+#include "link_hwss.h"
+#include "link.h"
+
+void set_hpo_dp_throttled_vcp_size(struct pipe_ctx *pipe_ctx,
+		struct fixed31_32 throttled_vcp_size);
+void set_hpo_dp_hblank_min_symbol_width(struct pipe_ctx *pipe_ctx,
+		const struct dc_link_settings *link_settings,
+		struct fixed31_32 throttled_vcp_size);
+void set_hpo_dp_hblank_min_symbol_width(struct pipe_ctx *pipe_ctx,
+		const struct dc_link_settings *link_settings,
+		struct fixed31_32 throttled_vcp_size);
+void setup_hpo_dp_stream_encoder(struct pipe_ctx *pipe_ctx);
+void reset_hpo_dp_stream_encoder(struct pipe_ctx *pipe_ctx);
+void setup_hpo_dp_stream_attribute(struct pipe_ctx *pipe_ctx);
+void enable_hpo_dp_link_output(struct dc_link *link,
+		const struct link_resource *link_res,
+		enum signal_type signal,
+		enum clock_source_id clock_source,
+		const struct dc_link_settings *link_settings);
+void disable_hpo_dp_link_output(struct dc_link *link,
+		const struct link_resource *link_res,
+		enum signal_type signal);
+void update_hpo_dp_stream_allocation_table(struct dc_link *link,
+		const struct link_resource *link_res,
+		const struct link_mst_stream_allocation_table *table);
+void setup_hpo_dp_audio_output(struct pipe_ctx *pipe_ctx,
+		struct audio_output *audio_output, uint32_t audio_inst);
+void enable_hpo_dp_audio_packet(struct pipe_ctx *pipe_ctx);
+void disable_hpo_dp_audio_packet(struct pipe_ctx *pipe_ctx);
+const struct link_hwss *get_hpo_dp_link_hwss(void);
+bool can_use_hpo_dp_link_hwss(const struct dc_link *link,
+		const struct link_resource *link_res);
+
+
+#endif /* __LINK_HWSS_HPO_DP_H__ */
diff --git a/drivers/gpu/drm/amd/display/dc/link/hwss/link_hwss_hpo_fixed_vs_pe_retimer_dp.c b/drivers/gpu/drm/amd/display/dc/link/hwss/link_hwss_hpo_fixed_vs_pe_retimer_dp.c
new file mode 100644
index 000000000..b621b9771
--- /dev/null
+++ b/drivers/gpu/drm/amd/display/dc/link/hwss/link_hwss_hpo_fixed_vs_pe_retimer_dp.c
@@ -0,0 +1,229 @@
+/*
+ * Copyright 2023 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 "link_hwss_hpo_dp.h"
+#include "link_hwss_hpo_fixed_vs_pe_retimer_dp.h"
+#include "link_hwss_dio_fixed_vs_pe_retimer.h"
+
+static void dp_hpo_fixed_vs_pe_retimer_set_tx_ffe(struct dc_link *link,
+		const struct dc_lane_settings *hw_lane_settings)
+{
+	const uint8_t vendor_ffe_preset_table[16] = {
+											0x01, 0x41, 0x61, 0x81,
+											0xB1, 0x05, 0x35, 0x65,
+											0x85, 0xA5, 0x09, 0x39,
+											0x59, 0x89, 0x0F, 0x24};
+
+	const uint8_t ffe_mask[4] = {
+			(hw_lane_settings[0].FFE_PRESET.settings.no_deemphasis != 0 ? 0x0F : 0xFF)
+				& (hw_lane_settings[0].FFE_PRESET.settings.no_preshoot != 0 ? 0xF1 : 0xFF),
+			(hw_lane_settings[1].FFE_PRESET.settings.no_deemphasis != 0 ? 0x0F : 0xFF)
+				& (hw_lane_settings[1].FFE_PRESET.settings.no_preshoot != 0 ? 0xF1 : 0xFF),
+			(hw_lane_settings[2].FFE_PRESET.settings.no_deemphasis != 0 ? 0x0F : 0xFF)
+				& (hw_lane_settings[2].FFE_PRESET.settings.no_preshoot != 0 ? 0xF1 : 0xFF),
+			(hw_lane_settings[3].FFE_PRESET.settings.no_deemphasis != 0 ? 0x0F : 0xFF)
+				& (hw_lane_settings[3].FFE_PRESET.settings.no_preshoot != 0 ? 0xF1 : 0xFF)};
+
+	const uint8_t ffe_cfg[4] = {
+			vendor_ffe_preset_table[hw_lane_settings[0].FFE_PRESET.settings.level] & ffe_mask[0],
+			vendor_ffe_preset_table[hw_lane_settings[1].FFE_PRESET.settings.level] & ffe_mask[1],
+			vendor_ffe_preset_table[hw_lane_settings[2].FFE_PRESET.settings.level] & ffe_mask[2],
+			vendor_ffe_preset_table[hw_lane_settings[3].FFE_PRESET.settings.level] & ffe_mask[3]};
+
+	const uint8_t dp_type = dp_dio_fixed_vs_pe_retimer_lane_cfg_to_hw_cfg(link);
+
+	const uint8_t vendor_lttpr_write_data_ffe1[4] = {0x01, 0x50, dp_type, 0x0F};
+	const uint8_t vendor_lttpr_write_data_ffe2[4] = {0x01, 0x55, dp_type, ffe_cfg[0]};
+	const uint8_t vendor_lttpr_write_data_ffe3[4] = {0x01, 0x56, dp_type, ffe_cfg[1]};
+	const uint8_t vendor_lttpr_write_data_ffe4[4] = {0x01, 0x57, dp_type, ffe_cfg[2]};
+	const uint8_t vendor_lttpr_write_data_ffe5[4] = {0x01, 0x58, dp_type, ffe_cfg[3]};
+
+	link->dc->link_srv->configure_fixed_vs_pe_retimer(link->ddc,
+			&vendor_lttpr_write_data_ffe1[0], sizeof(vendor_lttpr_write_data_ffe1));
+	link->dc->link_srv->configure_fixed_vs_pe_retimer(link->ddc,
+			&vendor_lttpr_write_data_ffe2[0], sizeof(vendor_lttpr_write_data_ffe2));
+	link->dc->link_srv->configure_fixed_vs_pe_retimer(link->ddc,
+			&vendor_lttpr_write_data_ffe3[0], sizeof(vendor_lttpr_write_data_ffe3));
+	link->dc->link_srv->configure_fixed_vs_pe_retimer(link->ddc,
+			&vendor_lttpr_write_data_ffe4[0], sizeof(vendor_lttpr_write_data_ffe4));
+	link->dc->link_srv->configure_fixed_vs_pe_retimer(link->ddc,
+			&vendor_lttpr_write_data_ffe5[0], sizeof(vendor_lttpr_write_data_ffe5));
+}
+
+static void dp_hpo_fixed_vs_pe_retimer_program_override_test_pattern(struct dc_link *link,
+		struct encoder_set_dp_phy_pattern_param *tp_params)
+{
+	const uint8_t vendor_lttpr_write_data_pg0[4] = {0x1, 0x11, 0x0, 0x0};
+	const uint8_t vendor_lttpr_write_data_pg1[4] = {0x1, 0x50, 0x50, 0x0};
+	const uint8_t vendor_lttpr_write_data_pg2[4] = {0x1, 0x51, 0x50, 0x0};
+	const uint8_t vendor_lttpr_write_data_pg3[4]  = {0x1, 0x10, 0x58, 0x21};
+	const uint8_t vendor_lttpr_write_data_pg4[4]  = {0x1, 0x10, 0x59, 0x21};
+	const uint8_t vendor_lttpr_write_data_pg5[4] = {0x1, 0x1C, 0x58, 0x4F};
+	const uint8_t vendor_lttpr_write_data_pg6[4] = {0x1, 0x1C, 0x59, 0x4F};
+	const uint8_t vendor_lttpr_write_data_pg7[4]  = {0x1, 0x30, 0x51, 0x20};
+	const uint8_t vendor_lttpr_write_data_pg8[4]  = {0x1, 0x30, 0x52, 0x20};
+	const uint8_t vendor_lttpr_write_data_pg9[4]  = {0x1, 0x30, 0x54, 0x20};
+	const uint8_t vendor_lttpr_write_data_pg10[4] = {0x1, 0x30, 0x55, 0x20};
+
+	link->dc->link_srv->configure_fixed_vs_pe_retimer(link->ddc,
+			&vendor_lttpr_write_data_pg0[0], sizeof(vendor_lttpr_write_data_pg0));
+	link->dc->link_srv->configure_fixed_vs_pe_retimer(link->ddc,
+			&vendor_lttpr_write_data_pg1[0], sizeof(vendor_lttpr_write_data_pg1));
+	link->dc->link_srv->configure_fixed_vs_pe_retimer(link->ddc,
+			&vendor_lttpr_write_data_pg2[0], sizeof(vendor_lttpr_write_data_pg2));
+	link->dc->link_srv->configure_fixed_vs_pe_retimer(link->ddc,
+			&vendor_lttpr_write_data_pg3[0], sizeof(vendor_lttpr_write_data_pg3));
+	link->dc->link_srv->configure_fixed_vs_pe_retimer(link->ddc,
+			&vendor_lttpr_write_data_pg4[0], sizeof(vendor_lttpr_write_data_pg4));
+	link->dc->link_srv->configure_fixed_vs_pe_retimer(link->ddc,
+			&vendor_lttpr_write_data_pg5[0], sizeof(vendor_lttpr_write_data_pg5));
+	link->dc->link_srv->configure_fixed_vs_pe_retimer(link->ddc,
+			&vendor_lttpr_write_data_pg6[0], sizeof(vendor_lttpr_write_data_pg6));
+
+	if (link->cur_link_settings.lane_count == LANE_COUNT_FOUR)
+		link->dc->link_srv->configure_fixed_vs_pe_retimer(link->ddc,
+				&vendor_lttpr_write_data_pg7[0], sizeof(vendor_lttpr_write_data_pg7));
+
+	link->dc->link_srv->configure_fixed_vs_pe_retimer(link->ddc,
+			&vendor_lttpr_write_data_pg8[0], sizeof(vendor_lttpr_write_data_pg8));
+
+	if (link->cur_link_settings.lane_count == LANE_COUNT_FOUR)
+		link->dc->link_srv->configure_fixed_vs_pe_retimer(link->ddc,
+				&vendor_lttpr_write_data_pg9[0], sizeof(vendor_lttpr_write_data_pg9));
+
+	link->dc->link_srv->configure_fixed_vs_pe_retimer(link->ddc,
+			&vendor_lttpr_write_data_pg10[0], sizeof(vendor_lttpr_write_data_pg10));
+}
+
+static bool dp_hpo_fixed_vs_pe_retimer_set_override_test_pattern(struct dc_link *link,
+		const struct link_resource *link_res, struct encoder_set_dp_phy_pattern_param *tp_params,
+		const struct link_hwss *link_hwss)
+{
+	struct encoder_set_dp_phy_pattern_param hw_tp_params = { 0 };
+	const uint8_t vendor_lttpr_exit_manual_automation_0[4] = {0x1, 0x11, 0x0, 0x06};
+
+	if (tp_params == NULL)
+		return false;
+
+	if (tp_params->dp_phy_pattern < DP_TEST_PATTERN_SQUARE_BEGIN ||
+			tp_params->dp_phy_pattern > DP_TEST_PATTERN_SQUARE_END) {
+		// Deprogram overrides from previously set square wave override
+		if (link->current_test_pattern == DP_TEST_PATTERN_80BIT_CUSTOM ||
+				link->current_test_pattern == DP_TEST_PATTERN_D102)
+			link->dc->link_srv->configure_fixed_vs_pe_retimer(link->ddc,
+					&vendor_lttpr_exit_manual_automation_0[0],
+					sizeof(vendor_lttpr_exit_manual_automation_0));
+		else
+			dp_dio_fixed_vs_pe_retimer_exit_manual_automation(link);
+
+		return false;
+	}
+
+	hw_tp_params.dp_phy_pattern = DP_TEST_PATTERN_PRBS31;
+	hw_tp_params.dp_panel_mode = tp_params->dp_panel_mode;
+
+	if (link_hwss->ext.set_dp_link_test_pattern)
+		link_hwss->ext.set_dp_link_test_pattern(link, link_res, &hw_tp_params);
+
+	dp_hpo_fixed_vs_pe_retimer_program_override_test_pattern(link, tp_params);
+
+	dp_hpo_fixed_vs_pe_retimer_set_tx_ffe(link, &link->cur_lane_setting[0]);
+
+	return true;
+}
+
+static void set_hpo_fixed_vs_pe_retimer_dp_link_test_pattern(struct dc_link *link,
+		const struct link_resource *link_res,
+		struct encoder_set_dp_phy_pattern_param *tp_params)
+{
+	if (!dp_hpo_fixed_vs_pe_retimer_set_override_test_pattern(
+			link, link_res, tp_params, get_hpo_dp_link_hwss())) {
+		link_res->hpo_dp_link_enc->funcs->set_link_test_pattern(
+				link_res->hpo_dp_link_enc, tp_params);
+	}
+	link->dc->link_srv->dp_trace_source_sequence(link, DPCD_SOURCE_SEQ_AFTER_SET_SOURCE_PATTERN);
+}
+
+static void set_hpo_fixed_vs_pe_retimer_dp_lane_settings(struct dc_link *link,
+		const struct link_resource *link_res,
+		const struct dc_link_settings *link_settings,
+		const struct dc_lane_settings lane_settings[LANE_COUNT_DP_MAX])
+{
+	link_res->hpo_dp_link_enc->funcs->set_ffe(
+			link_res->hpo_dp_link_enc,
+			link_settings,
+			lane_settings[0].FFE_PRESET.raw);
+
+	// FFE is programmed when retimer is programmed for SQ128, but explicit
+	// programming needed here as well in case FFE-only update is requested
+	if (link->current_test_pattern >= DP_TEST_PATTERN_SQUARE_BEGIN &&
+			link->current_test_pattern <= DP_TEST_PATTERN_SQUARE_END)
+		dp_hpo_fixed_vs_pe_retimer_set_tx_ffe(link, &lane_settings[0]);
+}
+
+static void enable_hpo_fixed_vs_pe_retimer_dp_link_output(struct dc_link *link,
+		const struct link_resource *link_res,
+		enum signal_type signal,
+		enum clock_source_id clock_source,
+		const struct dc_link_settings *link_settings)
+{
+	if (link_settings->lane_count == LANE_COUNT_FOUR)
+		enable_dio_fixed_vs_pe_retimer_program_4lane_output(link);
+
+	enable_hpo_dp_link_output(link, link_res, signal, clock_source, link_settings);
+}
+
+static const struct link_hwss hpo_fixed_vs_pe_retimer_dp_link_hwss = {
+	.setup_stream_encoder = setup_hpo_dp_stream_encoder,
+	.reset_stream_encoder = reset_hpo_dp_stream_encoder,
+	.setup_stream_attribute = setup_hpo_dp_stream_attribute,
+	.disable_link_output = disable_hpo_dp_link_output,
+	.setup_audio_output = setup_hpo_dp_audio_output,
+	.enable_audio_packet = enable_hpo_dp_audio_packet,
+	.disable_audio_packet = disable_hpo_dp_audio_packet,
+	.ext = {
+		.set_throttled_vcp_size = set_hpo_dp_throttled_vcp_size,
+		.set_hblank_min_symbol_width = set_hpo_dp_hblank_min_symbol_width,
+		.enable_dp_link_output = enable_hpo_fixed_vs_pe_retimer_dp_link_output,
+		.set_dp_link_test_pattern  = set_hpo_fixed_vs_pe_retimer_dp_link_test_pattern,
+		.set_dp_lane_settings = set_hpo_fixed_vs_pe_retimer_dp_lane_settings,
+		.update_stream_allocation_table = update_hpo_dp_stream_allocation_table,
+	},
+};
+
+bool requires_fixed_vs_pe_retimer_hpo_link_hwss(const struct dc_link *link)
+{
+	if (!(link->chip_caps & EXT_DISPLAY_PATH_CAPS__DP_FIXED_VS_EN))
+		return false;
+
+	if (!link->dpcd_caps.lttpr_caps.main_link_channel_coding.bits.DP_128b_132b_SUPPORTED)
+		return false;
+
+	return true;
+}
+
+const struct link_hwss *get_hpo_fixed_vs_pe_retimer_dp_link_hwss(void)
+{
+	return &hpo_fixed_vs_pe_retimer_dp_link_hwss;
+}
diff --git a/drivers/gpu/drm/amd/display/dc/link/hwss/link_hwss_hpo_fixed_vs_pe_retimer_dp.h b/drivers/gpu/drm/amd/display/dc/link/hwss/link_hwss_hpo_fixed_vs_pe_retimer_dp.h
new file mode 100644
index 000000000..82301187b
--- /dev/null
+++ b/drivers/gpu/drm/amd/display/dc/link/hwss/link_hwss_hpo_fixed_vs_pe_retimer_dp.h
@@ -0,0 +1,33 @@
+/*
+ * Copyright 2023 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 __LINK_HWSS_HPO_FIXED_VS_PE_RETIMER_DP_H__
+#define __LINK_HWSS_HPO_FIXED_VS_PE_RETIMER_DP_H__
+
+#include "link.h"
+
+bool requires_fixed_vs_pe_retimer_hpo_link_hwss(const struct dc_link *link);
+const struct link_hwss *get_hpo_fixed_vs_pe_retimer_dp_link_hwss(void);
+
+#endif /* __LINK_HWSS_HPO_FIXED_VS_PE_RETIMER_DP_H__ */
diff --git a/drivers/gpu/drm/amd/display/dc/link/link_detection.c b/drivers/gpu/drm/amd/display/dc/link/link_detection.c
new file mode 100644
index 000000000..c7a9e286a
--- /dev/null
+++ b/drivers/gpu/drm/amd/display/dc/link/link_detection.c
@@ -0,0 +1,1444 @@
+/*
+ * Copyright 2022 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
+ *
+ */
+
+/* FILE POLICY AND INTENDED USAGE:
+ * This file manages link detection states and receiver states by using various
+ * link protocols. It also provides helper functions to interpret certain
+ * capabilities or status based on the states it manages or retrieve them
+ * directly from connected receivers.
+ */
+
+#include "link_dpms.h"
+#include "link_detection.h"
+#include "link_hwss.h"
+#include "protocols/link_edp_panel_control.h"
+#include "protocols/link_ddc.h"
+#include "protocols/link_hpd.h"
+#include "protocols/link_dpcd.h"
+#include "protocols/link_dp_capability.h"
+#include "protocols/link_dp_dpia.h"
+#include "protocols/link_dp_phy.h"
+#include "protocols/link_dp_training.h"
+#include "accessories/link_dp_trace.h"
+
+#include "link_enc_cfg.h"
+#include "dm_helpers.h"
+#include "clk_mgr.h"
+
+#define DC_LOGGER_INIT(logger)
+
+#define LINK_INFO(...) \
+	DC_LOG_HW_HOTPLUG(  \
+		__VA_ARGS__)
+/*
+ * Some receivers fail to train on first try and are good
+ * on subsequent tries. 2 retries should be plenty. If we
+ * don't have a successful training then we don't expect to
+ * ever get one.
+ */
+#define LINK_TRAINING_MAX_VERIFY_RETRY 2
+
+static const u8 DP_SINK_BRANCH_DEV_NAME_7580[] = "7580\x80u";
+
+static const uint8_t dp_hdmi_dongle_signature_str[] = "DP-HDMI ADAPTOR";
+
+static enum ddc_transaction_type get_ddc_transaction_type(enum signal_type sink_signal)
+{
+	enum ddc_transaction_type transaction_type = DDC_TRANSACTION_TYPE_NONE;
+
+	switch (sink_signal) {
+	case SIGNAL_TYPE_DVI_SINGLE_LINK:
+	case SIGNAL_TYPE_DVI_DUAL_LINK:
+	case SIGNAL_TYPE_HDMI_TYPE_A:
+	case SIGNAL_TYPE_LVDS:
+	case SIGNAL_TYPE_RGB:
+		transaction_type = DDC_TRANSACTION_TYPE_I2C;
+		break;
+
+	case SIGNAL_TYPE_DISPLAY_PORT:
+	case SIGNAL_TYPE_EDP:
+		transaction_type = DDC_TRANSACTION_TYPE_I2C_OVER_AUX;
+		break;
+
+	case SIGNAL_TYPE_DISPLAY_PORT_MST:
+		/* MST does not use I2COverAux, but there is the
+		 * SPECIAL use case for "immediate dwnstrm device
+		 * access" (EPR#370830).
+		 */
+		transaction_type = DDC_TRANSACTION_TYPE_I2C_OVER_AUX;
+		break;
+
+	default:
+		break;
+	}
+
+	return transaction_type;
+}
+
+static enum signal_type get_basic_signal_type(struct graphics_object_id encoder,
+					      struct graphics_object_id downstream)
+{
+	if (downstream.type == OBJECT_TYPE_CONNECTOR) {
+		switch (downstream.id) {
+		case CONNECTOR_ID_SINGLE_LINK_DVII:
+			switch (encoder.id) {
+			case ENCODER_ID_INTERNAL_DAC1:
+			case ENCODER_ID_INTERNAL_KLDSCP_DAC1:
+			case ENCODER_ID_INTERNAL_DAC2:
+			case ENCODER_ID_INTERNAL_KLDSCP_DAC2:
+				return SIGNAL_TYPE_RGB;
+			default:
+				return SIGNAL_TYPE_DVI_SINGLE_LINK;
+			}
+		break;
+		case CONNECTOR_ID_DUAL_LINK_DVII:
+		{
+			switch (encoder.id) {
+			case ENCODER_ID_INTERNAL_DAC1:
+			case ENCODER_ID_INTERNAL_KLDSCP_DAC1:
+			case ENCODER_ID_INTERNAL_DAC2:
+			case ENCODER_ID_INTERNAL_KLDSCP_DAC2:
+				return SIGNAL_TYPE_RGB;
+			default:
+				return SIGNAL_TYPE_DVI_DUAL_LINK;
+			}
+		}
+		break;
+		case CONNECTOR_ID_SINGLE_LINK_DVID:
+			return SIGNAL_TYPE_DVI_SINGLE_LINK;
+		case CONNECTOR_ID_DUAL_LINK_DVID:
+			return SIGNAL_TYPE_DVI_DUAL_LINK;
+		case CONNECTOR_ID_VGA:
+			return SIGNAL_TYPE_RGB;
+		case CONNECTOR_ID_HDMI_TYPE_A:
+			return SIGNAL_TYPE_HDMI_TYPE_A;
+		case CONNECTOR_ID_LVDS:
+			return SIGNAL_TYPE_LVDS;
+		case CONNECTOR_ID_DISPLAY_PORT:
+		case CONNECTOR_ID_USBC:
+			return SIGNAL_TYPE_DISPLAY_PORT;
+		case CONNECTOR_ID_EDP:
+			return SIGNAL_TYPE_EDP;
+		default:
+			return SIGNAL_TYPE_NONE;
+		}
+	} else if (downstream.type == OBJECT_TYPE_ENCODER) {
+		switch (downstream.id) {
+		case ENCODER_ID_EXTERNAL_NUTMEG:
+		case ENCODER_ID_EXTERNAL_TRAVIS:
+			return SIGNAL_TYPE_DISPLAY_PORT;
+		default:
+			return SIGNAL_TYPE_NONE;
+		}
+	}
+
+	return SIGNAL_TYPE_NONE;
+}
+
+/*
+ * @brief
+ * Detect output sink type
+ */
+static enum signal_type link_detect_sink_signal_type(struct dc_link *link,
+					 enum dc_detect_reason reason)
+{
+	enum signal_type result;
+	struct graphics_object_id enc_id;
+
+	if (link->is_dig_mapping_flexible)
+		enc_id = (struct graphics_object_id){.id = ENCODER_ID_UNKNOWN};
+	else
+		enc_id = link->link_enc->id;
+	result = get_basic_signal_type(enc_id, link->link_id);
+
+	/* Use basic signal type for link without physical connector. */
+	if (link->ep_type != DISPLAY_ENDPOINT_PHY)
+		return result;
+
+	/* Internal digital encoder will detect only dongles
+	 * that require digital signal
+	 */
+
+	/* Detection mechanism is different
+	 * for different native connectors.
+	 * LVDS connector supports only LVDS signal;
+	 * PCIE is a bus slot, the actual connector needs to be detected first;
+	 * eDP connector supports only eDP signal;
+	 * HDMI should check straps for audio
+	 */
+
+	/* PCIE detects the actual connector on add-on board */
+	if (link->link_id.id == CONNECTOR_ID_PCIE) {
+		/* ZAZTODO implement PCIE add-on card detection */
+	}
+
+	switch (link->link_id.id) {
+	case CONNECTOR_ID_HDMI_TYPE_A: {
+		/* check audio support:
+		 * if native HDMI is not supported, switch to DVI
+		 */
+		struct audio_support *aud_support =
+					&link->dc->res_pool->audio_support;
+
+		if (!aud_support->hdmi_audio_native)
+			if (link->link_id.id == CONNECTOR_ID_HDMI_TYPE_A)
+				result = SIGNAL_TYPE_DVI_SINGLE_LINK;
+	}
+	break;
+	case CONNECTOR_ID_DISPLAY_PORT:
+	case CONNECTOR_ID_USBC: {
+		/* DP HPD short pulse. Passive DP dongle will not
+		 * have short pulse
+		 */
+		if (reason != DETECT_REASON_HPDRX) {
+			/* Check whether DP signal detected: if not -
+			 * we assume signal is DVI; it could be corrected
+			 * to HDMI after dongle detection
+			 */
+			if (!dm_helpers_is_dp_sink_present(link))
+				result = SIGNAL_TYPE_DVI_SINGLE_LINK;
+		}
+	}
+	break;
+	default:
+	break;
+	}
+
+	return result;
+}
+
+static enum signal_type decide_signal_from_strap_and_dongle_type(enum display_dongle_type dongle_type,
+								 struct audio_support *audio_support)
+{
+	enum signal_type signal = SIGNAL_TYPE_NONE;
+
+	switch (dongle_type) {
+	case DISPLAY_DONGLE_DP_HDMI_DONGLE:
+		if (audio_support->hdmi_audio_on_dongle)
+			signal = SIGNAL_TYPE_HDMI_TYPE_A;
+		else
+			signal = SIGNAL_TYPE_DVI_SINGLE_LINK;
+		break;
+	case DISPLAY_DONGLE_DP_DVI_DONGLE:
+		signal = SIGNAL_TYPE_DVI_SINGLE_LINK;
+		break;
+	case DISPLAY_DONGLE_DP_HDMI_MISMATCHED_DONGLE:
+		if (audio_support->hdmi_audio_native)
+			signal =  SIGNAL_TYPE_HDMI_TYPE_A;
+		else
+			signal = SIGNAL_TYPE_DVI_SINGLE_LINK;
+		break;
+	default:
+		signal = SIGNAL_TYPE_NONE;
+		break;
+	}
+
+	return signal;
+}
+
+static void read_scdc_caps(struct ddc_service *ddc_service,
+		struct dc_sink *sink)
+{
+	uint8_t slave_address = HDMI_SCDC_ADDRESS;
+	uint8_t offset = HDMI_SCDC_MANUFACTURER_OUI;
+
+	link_query_ddc_data(ddc_service, slave_address, &offset,
+			sizeof(offset), sink->scdc_caps.manufacturer_OUI.byte,
+			sizeof(sink->scdc_caps.manufacturer_OUI.byte));
+
+	offset = HDMI_SCDC_DEVICE_ID;
+
+	link_query_ddc_data(ddc_service, slave_address, &offset,
+			sizeof(offset), &(sink->scdc_caps.device_id.byte),
+			sizeof(sink->scdc_caps.device_id.byte));
+}
+
+static bool i2c_read(
+	struct ddc_service *ddc,
+	uint32_t address,
+	uint8_t *buffer,
+	uint32_t len)
+{
+	uint8_t offs_data = 0;
+	struct i2c_payload payloads[2] = {
+		{
+		.write = true,
+		.address = address,
+		.length = 1,
+		.data = &offs_data },
+		{
+		.write = false,
+		.address = address,
+		.length = len,
+		.data = buffer } };
+
+	struct i2c_command command = {
+		.payloads = payloads,
+		.number_of_payloads = 2,
+		.engine = DDC_I2C_COMMAND_ENGINE,
+		.speed = ddc->ctx->dc->caps.i2c_speed_in_khz };
+
+	return dm_helpers_submit_i2c(
+			ddc->ctx,
+			ddc->link,
+			&command);
+}
+
+enum {
+	DP_SINK_CAP_SIZE =
+		DP_EDP_CONFIGURATION_CAP - DP_DPCD_REV + 1
+};
+
+static void query_dp_dual_mode_adaptor(
+	struct ddc_service *ddc,
+	struct display_sink_capability *sink_cap)
+{
+	uint8_t i;
+	bool is_valid_hdmi_signature;
+	enum display_dongle_type *dongle = &sink_cap->dongle_type;
+	uint8_t type2_dongle_buf[DP_ADAPTOR_TYPE2_SIZE];
+	bool is_type2_dongle = false;
+	int retry_count = 2;
+	struct dp_hdmi_dongle_signature_data *dongle_signature;
+
+	/* Assume we have no valid DP passive dongle connected */
+	*dongle = DISPLAY_DONGLE_NONE;
+	sink_cap->max_hdmi_pixel_clock = DP_ADAPTOR_HDMI_SAFE_MAX_TMDS_CLK;
+
+	/* Read DP-HDMI dongle I2c (no response interpreted as DP-DVI dongle)*/
+	if (!i2c_read(
+		ddc,
+		DP_HDMI_DONGLE_ADDRESS,
+		type2_dongle_buf,
+		sizeof(type2_dongle_buf))) {
+		/* Passive HDMI dongles can sometimes fail here without retrying*/
+		while (retry_count > 0) {
+			if (i2c_read(ddc,
+				DP_HDMI_DONGLE_ADDRESS,
+				type2_dongle_buf,
+				sizeof(type2_dongle_buf)))
+				break;
+			retry_count--;
+		}
+		if (retry_count == 0) {
+			*dongle = DISPLAY_DONGLE_DP_DVI_DONGLE;
+			sink_cap->max_hdmi_pixel_clock = DP_ADAPTOR_DVI_MAX_TMDS_CLK;
+
+			CONN_DATA_DETECT(ddc->link, type2_dongle_buf, sizeof(type2_dongle_buf),
+					"DP-DVI passive dongle %dMhz: ",
+					DP_ADAPTOR_DVI_MAX_TMDS_CLK / 1000);
+			return;
+		}
+	}
+
+	/* Check if Type 2 dongle.*/
+	if (type2_dongle_buf[DP_ADAPTOR_TYPE2_REG_ID] == DP_ADAPTOR_TYPE2_ID)
+		is_type2_dongle = true;
+
+	dongle_signature =
+		(struct dp_hdmi_dongle_signature_data *)type2_dongle_buf;
+
+	is_valid_hdmi_signature = true;
+
+	/* Check EOT */
+	if (dongle_signature->eot != DP_HDMI_DONGLE_SIGNATURE_EOT) {
+		is_valid_hdmi_signature = false;
+	}
+
+	/* Check signature */
+	for (i = 0; i < sizeof(dongle_signature->id); ++i) {
+		/* If its not the right signature,
+		 * skip mismatch in subversion byte.*/
+		if (dongle_signature->id[i] !=
+			dp_hdmi_dongle_signature_str[i] && i != 3) {
+
+			if (is_type2_dongle) {
+				is_valid_hdmi_signature = false;
+				break;
+			}
+
+		}
+	}
+
+	if (is_type2_dongle) {
+		uint32_t max_tmds_clk =
+			type2_dongle_buf[DP_ADAPTOR_TYPE2_REG_MAX_TMDS_CLK];
+
+		max_tmds_clk = max_tmds_clk * 2 + max_tmds_clk / 2;
+
+		if (0 == max_tmds_clk ||
+				max_tmds_clk < DP_ADAPTOR_TYPE2_MIN_TMDS_CLK ||
+				max_tmds_clk > DP_ADAPTOR_TYPE2_MAX_TMDS_CLK) {
+			*dongle = DISPLAY_DONGLE_DP_DVI_DONGLE;
+
+			CONN_DATA_DETECT(ddc->link, type2_dongle_buf,
+					sizeof(type2_dongle_buf),
+					"DP-DVI passive dongle %dMhz: ",
+					DP_ADAPTOR_DVI_MAX_TMDS_CLK / 1000);
+		} else {
+			if (is_valid_hdmi_signature == true) {
+				*dongle = DISPLAY_DONGLE_DP_HDMI_DONGLE;
+
+				CONN_DATA_DETECT(ddc->link, type2_dongle_buf,
+						sizeof(type2_dongle_buf),
+						"Type 2 DP-HDMI passive dongle %dMhz: ",
+						max_tmds_clk);
+			} else {
+				*dongle = DISPLAY_DONGLE_DP_HDMI_MISMATCHED_DONGLE;
+
+				CONN_DATA_DETECT(ddc->link, type2_dongle_buf,
+						sizeof(type2_dongle_buf),
+						"Type 2 DP-HDMI passive dongle (no signature) %dMhz: ",
+						max_tmds_clk);
+
+			}
+
+			/* Multiply by 1000 to convert to kHz. */
+			sink_cap->max_hdmi_pixel_clock =
+				max_tmds_clk * 1000;
+		}
+		sink_cap->is_dongle_type_one = false;
+
+	} else {
+		if (is_valid_hdmi_signature == true) {
+			*dongle = DISPLAY_DONGLE_DP_HDMI_DONGLE;
+
+			CONN_DATA_DETECT(ddc->link, type2_dongle_buf,
+					sizeof(type2_dongle_buf),
+					"Type 1 DP-HDMI passive dongle %dMhz: ",
+					sink_cap->max_hdmi_pixel_clock / 1000);
+		} else {
+			*dongle = DISPLAY_DONGLE_DP_HDMI_MISMATCHED_DONGLE;
+
+			CONN_DATA_DETECT(ddc->link, type2_dongle_buf,
+					sizeof(type2_dongle_buf),
+					"Type 1 DP-HDMI passive dongle (no signature) %dMhz: ",
+					sink_cap->max_hdmi_pixel_clock / 1000);
+		}
+		sink_cap->is_dongle_type_one = true;
+	}
+
+	return;
+}
+
+static enum signal_type dp_passive_dongle_detection(struct ddc_service *ddc,
+						    struct display_sink_capability *sink_cap,
+						    struct audio_support *audio_support)
+{
+	query_dp_dual_mode_adaptor(ddc, sink_cap);
+
+	return decide_signal_from_strap_and_dongle_type(sink_cap->dongle_type,
+							audio_support);
+}
+
+static void link_disconnect_sink(struct dc_link *link)
+{
+	if (link->local_sink) {
+		dc_sink_release(link->local_sink);
+		link->local_sink = NULL;
+	}
+
+	link->dpcd_sink_count = 0;
+	//link->dpcd_caps.dpcd_rev.raw = 0;
+}
+
+static void link_disconnect_remap(struct dc_sink *prev_sink, struct dc_link *link)
+{
+	dc_sink_release(link->local_sink);
+	link->local_sink = prev_sink;
+}
+
+static void query_hdcp_capability(enum signal_type signal, struct dc_link *link)
+{
+	struct hdcp_protection_message msg22;
+	struct hdcp_protection_message msg14;
+
+	memset(&msg22, 0, sizeof(struct hdcp_protection_message));
+	memset(&msg14, 0, sizeof(struct hdcp_protection_message));
+	memset(link->hdcp_caps.rx_caps.raw, 0,
+		sizeof(link->hdcp_caps.rx_caps.raw));
+
+	if ((link->connector_signal == SIGNAL_TYPE_DISPLAY_PORT &&
+			link->ddc->transaction_type ==
+			DDC_TRANSACTION_TYPE_I2C_OVER_AUX) ||
+			link->connector_signal == SIGNAL_TYPE_EDP) {
+		msg22.data = link->hdcp_caps.rx_caps.raw;
+		msg22.length = sizeof(link->hdcp_caps.rx_caps.raw);
+		msg22.msg_id = HDCP_MESSAGE_ID_RX_CAPS;
+	} else {
+		msg22.data = &link->hdcp_caps.rx_caps.fields.version;
+		msg22.length = sizeof(link->hdcp_caps.rx_caps.fields.version);
+		msg22.msg_id = HDCP_MESSAGE_ID_HDCP2VERSION;
+	}
+	msg22.version = HDCP_VERSION_22;
+	msg22.link = HDCP_LINK_PRIMARY;
+	msg22.max_retries = 5;
+	dc_process_hdcp_msg(signal, link, &msg22);
+
+	if (signal == SIGNAL_TYPE_DISPLAY_PORT || signal == SIGNAL_TYPE_DISPLAY_PORT_MST) {
+		msg14.data = &link->hdcp_caps.bcaps.raw;
+		msg14.length = sizeof(link->hdcp_caps.bcaps.raw);
+		msg14.msg_id = HDCP_MESSAGE_ID_READ_BCAPS;
+		msg14.version = HDCP_VERSION_14;
+		msg14.link = HDCP_LINK_PRIMARY;
+		msg14.max_retries = 5;
+
+		dc_process_hdcp_msg(signal, link, &msg14);
+	}
+
+}
+static void read_current_link_settings_on_detect(struct dc_link *link)
+{
+	union lane_count_set lane_count_set = {0};
+	uint8_t link_bw_set;
+	uint8_t link_rate_set;
+	uint32_t read_dpcd_retry_cnt = 10;
+	enum dc_status status = DC_ERROR_UNEXPECTED;
+	int i;
+	union max_down_spread max_down_spread = {0};
+
+	// Read DPCD 00101h to find out the number of lanes currently set
+	for (i = 0; i < read_dpcd_retry_cnt; i++) {
+		status = core_link_read_dpcd(link,
+					     DP_LANE_COUNT_SET,
+					     &lane_count_set.raw,
+					     sizeof(lane_count_set));
+		/* First DPCD read after VDD ON can fail if the particular board
+		 * does not have HPD pin wired correctly. So if DPCD read fails,
+		 * which it should never happen, retry a few times. Target worst
+		 * case scenario of 80 ms.
+		 */
+		if (status == DC_OK) {
+			link->cur_link_settings.lane_count =
+					lane_count_set.bits.LANE_COUNT_SET;
+			break;
+		}
+
+		msleep(8);
+	}
+
+	// Read DPCD 00100h to find if standard link rates are set
+	core_link_read_dpcd(link, DP_LINK_BW_SET,
+			    &link_bw_set, sizeof(link_bw_set));
+
+	if (link_bw_set == 0) {
+		if (link->connector_signal == SIGNAL_TYPE_EDP) {
+			/* If standard link rates are not being used,
+			 * Read DPCD 00115h to find the edp link rate set used
+			 */
+			core_link_read_dpcd(link, DP_LINK_RATE_SET,
+					    &link_rate_set, sizeof(link_rate_set));
+
+			// edp_supported_link_rates_count = 0 for DP
+			if (link_rate_set < link->dpcd_caps.edp_supported_link_rates_count) {
+				link->cur_link_settings.link_rate =
+					link->dpcd_caps.edp_supported_link_rates[link_rate_set];
+				link->cur_link_settings.link_rate_set = link_rate_set;
+				link->cur_link_settings.use_link_rate_set = true;
+			}
+		} else {
+			// Link Rate not found. Seamless boot may not work.
+			ASSERT(false);
+		}
+	} else {
+		link->cur_link_settings.link_rate = link_bw_set;
+		link->cur_link_settings.use_link_rate_set = false;
+	}
+	// Read DPCD 00003h to find the max down spread.
+	core_link_read_dpcd(link, DP_MAX_DOWNSPREAD,
+			    &max_down_spread.raw, sizeof(max_down_spread));
+	link->cur_link_settings.link_spread =
+		max_down_spread.bits.MAX_DOWN_SPREAD ?
+		LINK_SPREAD_05_DOWNSPREAD_30KHZ : LINK_SPREAD_DISABLED;
+}
+
+static bool detect_dp(struct dc_link *link,
+		      struct display_sink_capability *sink_caps,
+		      enum dc_detect_reason reason)
+{
+	struct audio_support *audio_support = &link->dc->res_pool->audio_support;
+
+	sink_caps->signal = link_detect_sink_signal_type(link, reason);
+	sink_caps->transaction_type =
+		get_ddc_transaction_type(sink_caps->signal);
+
+	if (sink_caps->transaction_type == DDC_TRANSACTION_TYPE_I2C_OVER_AUX) {
+		sink_caps->signal = SIGNAL_TYPE_DISPLAY_PORT;
+		if (!detect_dp_sink_caps(link))
+			return false;
+
+		if (is_dp_branch_device(link))
+			/* DP SST branch */
+			link->type = dc_connection_sst_branch;
+	} else {
+		if (link->dc->debug.disable_dp_plus_plus_wa &&
+				link->link_enc->features.flags.bits.IS_UHBR20_CAPABLE)
+			return false;
+
+		/* DP passive dongles */
+		sink_caps->signal = dp_passive_dongle_detection(link->ddc,
+								sink_caps,
+								audio_support);
+		link->dpcd_caps.dongle_type = sink_caps->dongle_type;
+		link->dpcd_caps.is_dongle_type_one = sink_caps->is_dongle_type_one;
+		link->dpcd_caps.dpcd_rev.raw = 0;
+	}
+
+	return true;
+}
+
+static bool is_same_edid(struct dc_edid *old_edid, struct dc_edid *new_edid)
+{
+	if (old_edid->length != new_edid->length)
+		return false;
+
+	if (new_edid->length == 0)
+		return false;
+
+	return (memcmp(old_edid->raw_edid,
+		       new_edid->raw_edid, new_edid->length) == 0);
+}
+
+static bool wait_for_entering_dp_alt_mode(struct dc_link *link)
+{
+
+	/**
+	 * something is terribly wrong if time out is > 200ms. (5Hz)
+	 * 500 microseconds * 400 tries us 200 ms
+	 **/
+	unsigned int sleep_time_in_microseconds = 500;
+	unsigned int tries_allowed = 400;
+	bool is_in_alt_mode;
+	unsigned long long enter_timestamp;
+	unsigned long long finish_timestamp;
+	unsigned long long time_taken_in_ns;
+	int tries_taken;
+
+	DC_LOGGER_INIT(link->ctx->logger);
+
+	/**
+	 * this function will only exist if we are on dcn21 (is_in_alt_mode is a
+	 *  function pointer, so checking to see if it is equal to 0 is the same
+	 *  as checking to see if it is null
+	 **/
+	if (!link->link_enc->funcs->is_in_alt_mode)
+		return true;
+
+	is_in_alt_mode = link->link_enc->funcs->is_in_alt_mode(link->link_enc);
+	DC_LOG_DC("DP Alt mode state on HPD: %d\n", is_in_alt_mode);
+
+	if (is_in_alt_mode)
+		return true;
+
+	enter_timestamp = dm_get_timestamp(link->ctx);
+
+	for (tries_taken = 0; tries_taken < tries_allowed; tries_taken++) {
+		udelay(sleep_time_in_microseconds);
+		/* ask the link if alt mode is enabled, if so return ok */
+		if (link->link_enc->funcs->is_in_alt_mode(link->link_enc)) {
+			finish_timestamp = dm_get_timestamp(link->ctx);
+			time_taken_in_ns =
+				dm_get_elapse_time_in_ns(link->ctx,
+							 finish_timestamp,
+							 enter_timestamp);
+			DC_LOG_WARNING("Alt mode entered finished after %llu ms\n",
+				       div_u64(time_taken_in_ns, 1000000));
+			return true;
+		}
+	}
+	finish_timestamp = dm_get_timestamp(link->ctx);
+	time_taken_in_ns = dm_get_elapse_time_in_ns(link->ctx, finish_timestamp,
+						    enter_timestamp);
+	DC_LOG_WARNING("Alt mode has timed out after %llu ms\n",
+			div_u64(time_taken_in_ns, 1000000));
+	return false;
+}
+
+static void apply_dpia_mst_dsc_always_on_wa(struct dc_link *link)
+{
+	/* Apply work around for tunneled MST on certain USB4 docks. Always use DSC if dock
+	 * reports DSC support.
+	 */
+	if (link->ep_type == DISPLAY_ENDPOINT_USB4_DPIA &&
+			link->type == dc_connection_mst_branch &&
+			link->dpcd_caps.branch_dev_id == DP_BRANCH_DEVICE_ID_90CC24 &&
+			link->dpcd_caps.branch_hw_revision == DP_BRANCH_HW_REV_20 &&
+			link->dpcd_caps.dsc_caps.dsc_basic_caps.fields.dsc_support.DSC_SUPPORT &&
+			!link->dc->debug.dpia_debug.bits.disable_mst_dsc_work_around)
+		link->wa_flags.dpia_mst_dsc_always_on = true;
+}
+
+static void revert_dpia_mst_dsc_always_on_wa(struct dc_link *link)
+{
+	/* Disable work around which keeps DSC on for tunneled MST on certain USB4 docks. */
+	if (link->ep_type == DISPLAY_ENDPOINT_USB4_DPIA)
+		link->wa_flags.dpia_mst_dsc_always_on = false;
+}
+
+static bool discover_dp_mst_topology(struct dc_link *link, enum dc_detect_reason reason)
+{
+	DC_LOGGER_INIT(link->ctx->logger);
+
+	LINK_INFO("link=%d, mst branch is now Connected\n",
+		  link->link_index);
+
+	link->type = dc_connection_mst_branch;
+	apply_dpia_mst_dsc_always_on_wa(link);
+
+	dm_helpers_dp_update_branch_info(link->ctx, link);
+	if (dm_helpers_dp_mst_start_top_mgr(link->ctx,
+			link, (reason == DETECT_REASON_BOOT || reason == DETECT_REASON_RESUMEFROMS3S4))) {
+		link_disconnect_sink(link);
+	} else {
+		link->type = dc_connection_sst_branch;
+	}
+
+	return link->type == dc_connection_mst_branch;
+}
+
+bool link_reset_cur_dp_mst_topology(struct dc_link *link)
+{
+	DC_LOGGER_INIT(link->ctx->logger);
+
+	LINK_INFO("link=%d, mst branch is now Disconnected\n",
+		  link->link_index);
+
+	revert_dpia_mst_dsc_always_on_wa(link);
+	return dm_helpers_dp_mst_stop_top_mgr(link->ctx, link);
+}
+
+static bool should_prepare_phy_clocks_for_link_verification(const struct dc *dc,
+		enum dc_detect_reason reason)
+{
+	int i;
+	bool can_apply_seamless_boot = false;
+
+	for (i = 0; i < dc->current_state->stream_count; i++) {
+		if (dc->current_state->streams[i]->apply_seamless_boot_optimization) {
+			can_apply_seamless_boot = true;
+			break;
+		}
+	}
+
+	return !can_apply_seamless_boot && reason != DETECT_REASON_BOOT;
+}
+
+static void prepare_phy_clocks_for_destructive_link_verification(const struct dc *dc)
+{
+	dc_z10_restore(dc);
+	clk_mgr_exit_optimized_pwr_state(dc, dc->clk_mgr);
+}
+
+static void restore_phy_clocks_for_destructive_link_verification(const struct dc *dc)
+{
+	clk_mgr_optimize_pwr_state(dc, dc->clk_mgr);
+}
+
+static void verify_link_capability_destructive(struct dc_link *link,
+		struct dc_sink *sink,
+		enum dc_detect_reason reason)
+{
+	bool should_prepare_phy_clocks =
+			should_prepare_phy_clocks_for_link_verification(link->dc, reason);
+
+	if (should_prepare_phy_clocks)
+		prepare_phy_clocks_for_destructive_link_verification(link->dc);
+
+	if (dc_is_dp_signal(link->local_sink->sink_signal)) {
+		struct dc_link_settings known_limit_link_setting =
+				dp_get_max_link_cap(link);
+		link_set_all_streams_dpms_off_for_link(link);
+		dp_verify_link_cap_with_retries(
+				link, &known_limit_link_setting,
+				LINK_TRAINING_MAX_VERIFY_RETRY);
+	} else {
+		ASSERT(0);
+	}
+
+	if (should_prepare_phy_clocks)
+		restore_phy_clocks_for_destructive_link_verification(link->dc);
+}
+
+static void verify_link_capability_non_destructive(struct dc_link *link)
+{
+	if (dc_is_dp_signal(link->local_sink->sink_signal)) {
+		if (dc_is_embedded_signal(link->local_sink->sink_signal) ||
+				link->ep_type == DISPLAY_ENDPOINT_USB4_DPIA)
+			/* TODO - should we check link encoder's max link caps here?
+			 * How do we know which link encoder to check from?
+			 */
+			link->verified_link_cap = link->reported_link_cap;
+		else
+			link->verified_link_cap = dp_get_max_link_cap(link);
+	}
+}
+
+static bool should_verify_link_capability_destructively(struct dc_link *link,
+		enum dc_detect_reason reason)
+{
+	bool destrictive = false;
+	struct dc_link_settings max_link_cap;
+	bool is_link_enc_unavailable = link->link_enc &&
+			link->dc->res_pool->funcs->link_encs_assign &&
+			!link_enc_cfg_is_link_enc_avail(
+					link->ctx->dc,
+					link->link_enc->preferred_engine,
+					link);
+
+	if (dc_is_dp_signal(link->local_sink->sink_signal)) {
+		max_link_cap = dp_get_max_link_cap(link);
+		destrictive = true;
+
+		if (link->dc->debug.skip_detection_link_training ||
+				dc_is_embedded_signal(link->local_sink->sink_signal) ||
+				link->ep_type == DISPLAY_ENDPOINT_USB4_DPIA) {
+			destrictive = false;
+		} else if (link_dp_get_encoding_format(&max_link_cap) ==
+				DP_8b_10b_ENCODING) {
+			if (link->dpcd_caps.is_mst_capable ||
+					is_link_enc_unavailable) {
+				destrictive = false;
+			}
+		}
+	}
+
+	return destrictive;
+}
+
+static void verify_link_capability(struct dc_link *link, struct dc_sink *sink,
+		enum dc_detect_reason reason)
+{
+	if (should_verify_link_capability_destructively(link, reason))
+		verify_link_capability_destructive(link, sink, reason);
+	else
+		verify_link_capability_non_destructive(link);
+}
+
+/*
+ * detect_link_and_local_sink() - Detect if a sink is attached to a given link
+ *
+ * link->local_sink is created or destroyed as needed.
+ *
+ * This does not create remote sinks.
+ */
+static bool detect_link_and_local_sink(struct dc_link *link,
+				  enum dc_detect_reason reason)
+{
+	struct dc_sink_init_data sink_init_data = { 0 };
+	struct display_sink_capability sink_caps = { 0 };
+	uint32_t i;
+	bool converter_disable_audio = false;
+	struct audio_support *aud_support = &link->dc->res_pool->audio_support;
+	bool same_edid = false;
+	enum dc_edid_status edid_status;
+	struct dc_context *dc_ctx = link->ctx;
+	struct dc *dc = dc_ctx->dc;
+	struct dc_sink *sink = NULL;
+	struct dc_sink *prev_sink = NULL;
+	struct dpcd_caps prev_dpcd_caps;
+	enum dc_connection_type new_connection_type = dc_connection_none;
+	enum dc_connection_type pre_connection_type = link->type;
+	const uint32_t post_oui_delay = 30; // 30ms
+
+	DC_LOGGER_INIT(link->ctx->logger);
+
+	if (dc_is_virtual_signal(link->connector_signal))
+		return false;
+
+	if (((link->connector_signal == SIGNAL_TYPE_LVDS ||
+		link->connector_signal == SIGNAL_TYPE_EDP) &&
+		(!link->dc->config.allow_edp_hotplug_detection)) &&
+		link->local_sink) {
+		// need to re-write OUI and brightness in resume case
+		if (link->connector_signal == SIGNAL_TYPE_EDP &&
+			(link->dpcd_sink_ext_caps.bits.oled == 1)) {
+			dpcd_set_source_specific_data(link);
+			msleep(post_oui_delay);
+			set_default_brightness_aux(link);
+		}
+
+		return true;
+	}
+
+	if (!link_detect_connection_type(link, &new_connection_type)) {
+		BREAK_TO_DEBUGGER();
+		return false;
+	}
+
+	prev_sink = link->local_sink;
+	if (prev_sink) {
+		dc_sink_retain(prev_sink);
+		memcpy(&prev_dpcd_caps, &link->dpcd_caps, sizeof(struct dpcd_caps));
+	}
+
+	link_disconnect_sink(link);
+	if (new_connection_type != dc_connection_none) {
+		link->type = new_connection_type;
+		link->link_state_valid = false;
+
+		/* From Disconnected-to-Connected. */
+		switch (link->connector_signal) {
+		case SIGNAL_TYPE_HDMI_TYPE_A: {
+			sink_caps.transaction_type = DDC_TRANSACTION_TYPE_I2C;
+			if (aud_support->hdmi_audio_native)
+				sink_caps.signal = SIGNAL_TYPE_HDMI_TYPE_A;
+			else
+				sink_caps.signal = SIGNAL_TYPE_DVI_SINGLE_LINK;
+			break;
+		}
+
+		case SIGNAL_TYPE_DVI_SINGLE_LINK: {
+			sink_caps.transaction_type = DDC_TRANSACTION_TYPE_I2C;
+			sink_caps.signal = SIGNAL_TYPE_DVI_SINGLE_LINK;
+			break;
+		}
+
+		case SIGNAL_TYPE_DVI_DUAL_LINK: {
+			sink_caps.transaction_type = DDC_TRANSACTION_TYPE_I2C;
+			sink_caps.signal = SIGNAL_TYPE_DVI_DUAL_LINK;
+			break;
+		}
+
+		case SIGNAL_TYPE_LVDS: {
+			sink_caps.transaction_type = DDC_TRANSACTION_TYPE_I2C;
+			sink_caps.signal = SIGNAL_TYPE_LVDS;
+			break;
+		}
+
+		case SIGNAL_TYPE_EDP: {
+			detect_edp_sink_caps(link);
+			read_current_link_settings_on_detect(link);
+
+			/* Disable power sequence on MIPI panel + converter
+			 */
+			if (dc->config.enable_mipi_converter_optimization &&
+				dc_ctx->dce_version == DCN_VERSION_3_01 &&
+				link->dpcd_caps.sink_dev_id == DP_BRANCH_DEVICE_ID_0022B9 &&
+				memcmp(&link->dpcd_caps.branch_dev_name, DP_SINK_BRANCH_DEV_NAME_7580,
+					sizeof(link->dpcd_caps.branch_dev_name)) == 0) {
+				dc->config.edp_no_power_sequencing = true;
+
+				if (!link->dpcd_caps.set_power_state_capable_edp)
+					link->wa_flags.dp_keep_receiver_powered = true;
+			}
+
+			sink_caps.transaction_type = DDC_TRANSACTION_TYPE_I2C_OVER_AUX;
+			sink_caps.signal = SIGNAL_TYPE_EDP;
+			break;
+		}
+
+		case SIGNAL_TYPE_DISPLAY_PORT: {
+
+			/* wa HPD high coming too early*/
+			if (link->ep_type == DISPLAY_ENDPOINT_PHY &&
+			    link->link_enc->features.flags.bits.DP_IS_USB_C == 1) {
+
+				/* if alt mode times out, return false */
+				if (!wait_for_entering_dp_alt_mode(link))
+					return false;
+			}
+
+			if (!detect_dp(link, &sink_caps, reason)) {
+				link->type = pre_connection_type;
+
+				if (prev_sink)
+					dc_sink_release(prev_sink);
+				return false;
+			}
+
+			/* Active SST downstream branch device unplug*/
+			if (link->type == dc_connection_sst_branch &&
+			    link->dpcd_caps.sink_count.bits.SINK_COUNT == 0) {
+				if (prev_sink)
+					/* Downstream unplug */
+					dc_sink_release(prev_sink);
+				return true;
+			}
+
+			/* disable audio for non DP to HDMI active sst converter */
+			if (link->type == dc_connection_sst_branch &&
+					is_dp_active_dongle(link) &&
+					(link->dpcd_caps.dongle_type !=
+							DISPLAY_DONGLE_DP_HDMI_CONVERTER))
+				converter_disable_audio = true;
+
+			/* limited link rate to HBR3 for DPIA until we implement USB4 V2 */
+			if (link->ep_type == DISPLAY_ENDPOINT_USB4_DPIA &&
+					link->reported_link_cap.link_rate > LINK_RATE_HIGH3)
+				link->reported_link_cap.link_rate = LINK_RATE_HIGH3;
+			break;
+		}
+
+		default:
+			DC_ERROR("Invalid connector type! signal:%d\n",
+				 link->connector_signal);
+			if (prev_sink)
+				dc_sink_release(prev_sink);
+			return false;
+		} /* switch() */
+
+		if (link->dpcd_caps.sink_count.bits.SINK_COUNT)
+			link->dpcd_sink_count =
+				link->dpcd_caps.sink_count.bits.SINK_COUNT;
+		else
+			link->dpcd_sink_count = 1;
+
+		set_ddc_transaction_type(link->ddc,
+						     sink_caps.transaction_type);
+
+		link->aux_mode =
+			link_is_in_aux_transaction_mode(link->ddc);
+
+		sink_init_data.link = link;
+		sink_init_data.sink_signal = sink_caps.signal;
+
+		sink = dc_sink_create(&sink_init_data);
+		if (!sink) {
+			DC_ERROR("Failed to create sink!\n");
+			if (prev_sink)
+				dc_sink_release(prev_sink);
+			return false;
+		}
+
+		sink->link->dongle_max_pix_clk = sink_caps.max_hdmi_pixel_clock;
+		sink->converter_disable_audio = converter_disable_audio;
+
+		/* dc_sink_create returns a new reference */
+		link->local_sink = sink;
+
+		edid_status = dm_helpers_read_local_edid(link->ctx,
+							 link, sink);
+
+		switch (edid_status) {
+		case EDID_BAD_CHECKSUM:
+			DC_LOG_ERROR("EDID checksum invalid.\n");
+			break;
+		case EDID_PARTIAL_VALID:
+			DC_LOG_ERROR("Partial EDID valid, abandon invalid blocks.\n");
+			break;
+		case EDID_NO_RESPONSE:
+			DC_LOG_ERROR("No EDID read.\n");
+			/*
+			 * Abort detection for non-DP connectors if we have
+			 * no EDID
+			 *
+			 * DP needs to report as connected if HDP is high
+			 * even if we have no EDID in order to go to
+			 * fail-safe mode
+			 */
+			if (dc_is_hdmi_signal(link->connector_signal) ||
+			    dc_is_dvi_signal(link->connector_signal)) {
+				if (prev_sink)
+					dc_sink_release(prev_sink);
+
+				return false;
+			}
+
+			if (link->type == dc_connection_sst_branch &&
+					link->dpcd_caps.dongle_type ==
+						DISPLAY_DONGLE_DP_VGA_CONVERTER &&
+					reason == DETECT_REASON_HPDRX) {
+				/* Abort detection for DP-VGA adapters when EDID
+				 * can't be read and detection reason is VGA-side
+				 * hotplug
+				 */
+				if (prev_sink)
+					dc_sink_release(prev_sink);
+				link_disconnect_sink(link);
+
+				return true;
+			}
+
+			break;
+		default:
+			break;
+		}
+
+		// Check if edid is the same
+		if ((prev_sink) &&
+		    (edid_status == EDID_THE_SAME || edid_status == EDID_OK))
+			same_edid = is_same_edid(&prev_sink->dc_edid,
+						 &sink->dc_edid);
+
+		if (sink->edid_caps.panel_patch.skip_scdc_overwrite)
+			link->ctx->dc->debug.hdmi20_disable = true;
+
+		if (sink->edid_caps.panel_patch.remove_sink_ext_caps)
+			link->dpcd_sink_ext_caps.raw = 0;
+
+		if (dc_is_hdmi_signal(link->connector_signal))
+			read_scdc_caps(link->ddc, link->local_sink);
+
+		if (link->connector_signal == SIGNAL_TYPE_DISPLAY_PORT &&
+		    sink_caps.transaction_type ==
+		    DDC_TRANSACTION_TYPE_I2C_OVER_AUX) {
+			/*
+			 * TODO debug why certain monitors don't like
+			 *  two link trainings
+			 */
+			query_hdcp_capability(sink->sink_signal, link);
+		} else {
+			// If edid is the same, then discard new sink and revert back to original sink
+			if (same_edid) {
+				link_disconnect_remap(prev_sink, link);
+				sink = prev_sink;
+				prev_sink = NULL;
+			}
+			query_hdcp_capability(sink->sink_signal, link);
+		}
+
+		/* HDMI-DVI Dongle */
+		if (sink->sink_signal == SIGNAL_TYPE_HDMI_TYPE_A &&
+		    !sink->edid_caps.edid_hdmi)
+			sink->sink_signal = SIGNAL_TYPE_DVI_SINGLE_LINK;
+
+		if (link->local_sink && dc_is_dp_signal(sink_caps.signal))
+			dp_trace_init(link);
+
+		/* Connectivity log: detection */
+		for (i = 0; i < sink->dc_edid.length / DC_EDID_BLOCK_SIZE; i++) {
+			CONN_DATA_DETECT(link,
+					 &sink->dc_edid.raw_edid[i * DC_EDID_BLOCK_SIZE],
+					 DC_EDID_BLOCK_SIZE,
+					 "%s: [Block %d] ", sink->edid_caps.display_name, i);
+		}
+
+		DC_LOG_DETECTION_EDID_PARSER("%s: "
+			"manufacturer_id = %X, "
+			"product_id = %X, "
+			"serial_number = %X, "
+			"manufacture_week = %d, "
+			"manufacture_year = %d, "
+			"display_name = %s, "
+			"speaker_flag = %d, "
+			"audio_mode_count = %d\n",
+			__func__,
+			sink->edid_caps.manufacturer_id,
+			sink->edid_caps.product_id,
+			sink->edid_caps.serial_number,
+			sink->edid_caps.manufacture_week,
+			sink->edid_caps.manufacture_year,
+			sink->edid_caps.display_name,
+			sink->edid_caps.speaker_flags,
+			sink->edid_caps.audio_mode_count);
+
+		for (i = 0; i < sink->edid_caps.audio_mode_count; i++) {
+			DC_LOG_DETECTION_EDID_PARSER("%s: mode number = %d, "
+				"format_code = %d, "
+				"channel_count = %d, "
+				"sample_rate = %d, "
+				"sample_size = %d\n",
+				__func__,
+				i,
+				sink->edid_caps.audio_modes[i].format_code,
+				sink->edid_caps.audio_modes[i].channel_count,
+				sink->edid_caps.audio_modes[i].sample_rate,
+				sink->edid_caps.audio_modes[i].sample_size);
+		}
+
+		if (link->connector_signal == SIGNAL_TYPE_EDP) {
+			// Init dc_panel_config by HW config
+			if (dc_ctx->dc->res_pool->funcs->get_panel_config_defaults)
+				dc_ctx->dc->res_pool->funcs->get_panel_config_defaults(&link->panel_config);
+			// Pickup base DM settings
+			dm_helpers_init_panel_settings(dc_ctx, &link->panel_config, sink);
+			// Override dc_panel_config if system has specific settings
+			dm_helpers_override_panel_settings(dc_ctx, &link->panel_config);
+
+			//sink only can use supported link rate table, we are foreced to enable it
+			if (link->reported_link_cap.link_rate == LINK_RATE_UNKNOWN)
+				link->panel_config.ilr.optimize_edp_link_rate = true;
+			if (edp_is_ilr_optimization_enabled(link))
+				link->reported_link_cap.link_rate = get_max_link_rate_from_ilr_table(link);
+		}
+
+	} else {
+		/* From Connected-to-Disconnected. */
+		link->type = dc_connection_none;
+		sink_caps.signal = SIGNAL_TYPE_NONE;
+		memset(&link->hdcp_caps, 0, sizeof(struct hdcp_caps));
+		/* When we unplug a passive DP-HDMI dongle connection, dongle_max_pix_clk
+		 *  is not cleared. If we emulate a DP signal on this connection, it thinks
+		 *  the dongle is still there and limits the number of modes we can emulate.
+		 *  Clear dongle_max_pix_clk on disconnect to fix this
+		 */
+		link->dongle_max_pix_clk = 0;
+
+		dc_link_clear_dprx_states(link);
+		dp_trace_reset(link);
+	}
+
+	LINK_INFO("link=%d, dc_sink_in=%p is now %s prev_sink=%p edid same=%d\n",
+		  link->link_index, sink,
+		  (sink_caps.signal ==
+		   SIGNAL_TYPE_NONE ? "Disconnected" : "Connected"),
+		  prev_sink, same_edid);
+
+	if (prev_sink)
+		dc_sink_release(prev_sink);
+
+	return true;
+}
+
+/*
+ * link_detect_connection_type() - Determine if there is a sink connected
+ *
+ * @type: Returned connection type
+ * Does not detect downstream devices, such as MST sinks
+ * or display connected through active dongles
+ */
+bool link_detect_connection_type(struct dc_link *link, enum dc_connection_type *type)
+{
+	uint32_t is_hpd_high = 0;
+
+	if (link->connector_signal == SIGNAL_TYPE_LVDS) {
+		*type = dc_connection_single;
+		return true;
+	}
+
+	if (link->connector_signal == SIGNAL_TYPE_EDP) {
+		/*in case it is not on*/
+		if (!link->dc->config.edp_no_power_sequencing)
+			link->dc->hwss.edp_power_control(link, true);
+		link->dc->hwss.edp_wait_for_hpd_ready(link, true);
+	}
+
+	/* Link may not have physical HPD pin. */
+	if (link->ep_type != DISPLAY_ENDPOINT_PHY) {
+		if (link->is_hpd_pending || !dpia_query_hpd_status(link))
+			*type = dc_connection_none;
+		else
+			*type = dc_connection_single;
+
+		return true;
+	}
+
+
+	if (!query_hpd_status(link, &is_hpd_high))
+		goto hpd_gpio_failure;
+
+	if (is_hpd_high) {
+		*type = dc_connection_single;
+		/* TODO: need to do the actual detection */
+	} else {
+		*type = dc_connection_none;
+		if (link->connector_signal == SIGNAL_TYPE_EDP) {
+			/* eDP is not connected, power down it */
+			if (!link->dc->config.edp_no_power_sequencing)
+				link->dc->hwss.edp_power_control(link, false);
+		}
+	}
+
+	return true;
+
+hpd_gpio_failure:
+	return false;
+}
+
+bool link_detect(struct dc_link *link, enum dc_detect_reason reason)
+{
+	bool is_local_sink_detect_success;
+	bool is_delegated_to_mst_top_mgr = false;
+	enum dc_connection_type pre_link_type = link->type;
+
+	DC_LOGGER_INIT(link->ctx->logger);
+
+	is_local_sink_detect_success = detect_link_and_local_sink(link, reason);
+
+	if (is_local_sink_detect_success && link->local_sink)
+		verify_link_capability(link, link->local_sink, reason);
+
+	DC_LOG_DC("%s: link_index=%d is_local_sink_detect_success=%d pre_link_type=%d link_type=%d\n", __func__,
+				link->link_index, is_local_sink_detect_success, pre_link_type, link->type);
+
+	if (is_local_sink_detect_success && link->local_sink &&
+			dc_is_dp_signal(link->local_sink->sink_signal) &&
+			link->dpcd_caps.is_mst_capable)
+		is_delegated_to_mst_top_mgr = discover_dp_mst_topology(link, reason);
+
+	if (is_local_sink_detect_success &&
+			pre_link_type == dc_connection_mst_branch &&
+			link->type != dc_connection_mst_branch)
+		is_delegated_to_mst_top_mgr = link_reset_cur_dp_mst_topology(link);
+
+	return is_local_sink_detect_success && !is_delegated_to_mst_top_mgr;
+}
+
+void link_clear_dprx_states(struct dc_link *link)
+{
+	memset(&link->dprx_states, 0, sizeof(link->dprx_states));
+}
+
+bool link_is_hdcp14(struct dc_link *link, enum signal_type signal)
+{
+	bool ret = false;
+
+	switch (signal)	{
+	case SIGNAL_TYPE_DISPLAY_PORT:
+	case SIGNAL_TYPE_DISPLAY_PORT_MST:
+		ret = link->hdcp_caps.bcaps.bits.HDCP_CAPABLE;
+		break;
+	case SIGNAL_TYPE_DVI_SINGLE_LINK:
+	case SIGNAL_TYPE_DVI_DUAL_LINK:
+	case SIGNAL_TYPE_HDMI_TYPE_A:
+	/* HDMI doesn't tell us its HDCP(1.4) capability, so assume to always be capable,
+	 * we can poll for bksv but some displays have an issue with this. Since its so rare
+	 * for a display to not be 1.4 capable, this assumtion is ok
+	 */
+		ret = true;
+		break;
+	default:
+		break;
+	}
+	return ret;
+}
+
+bool link_is_hdcp22(struct dc_link *link, enum signal_type signal)
+{
+	bool ret = false;
+
+	switch (signal)	{
+	case SIGNAL_TYPE_DISPLAY_PORT:
+	case SIGNAL_TYPE_DISPLAY_PORT_MST:
+		ret = (link->hdcp_caps.bcaps.bits.HDCP_CAPABLE &&
+				link->hdcp_caps.rx_caps.fields.byte0.hdcp_capable &&
+				(link->hdcp_caps.rx_caps.fields.version == 0x2)) ? 1 : 0;
+		break;
+	case SIGNAL_TYPE_DVI_SINGLE_LINK:
+	case SIGNAL_TYPE_DVI_DUAL_LINK:
+	case SIGNAL_TYPE_HDMI_TYPE_A:
+		ret = (link->hdcp_caps.rx_caps.fields.version == 0x4) ? 1:0;
+		break;
+	default:
+		break;
+	}
+
+	return ret;
+}
+
+const struct dc_link_status *link_get_status(const struct dc_link *link)
+{
+	return &link->link_status;
+}
+
+
+static bool link_add_remote_sink_helper(struct dc_link *dc_link, struct dc_sink *sink)
+{
+	if (dc_link->sink_count >= MAX_SINKS_PER_LINK) {
+		BREAK_TO_DEBUGGER();
+		return false;
+	}
+
+	dc_sink_retain(sink);
+
+	dc_link->remote_sinks[dc_link->sink_count] = sink;
+	dc_link->sink_count++;
+
+	return true;
+}
+
+struct dc_sink *link_add_remote_sink(
+		struct dc_link *link,
+		const uint8_t *edid,
+		int len,
+		struct dc_sink_init_data *init_data)
+{
+	struct dc_sink *dc_sink;
+	enum dc_edid_status edid_status;
+
+	if (len > DC_MAX_EDID_BUFFER_SIZE) {
+		dm_error("Max EDID buffer size breached!\n");
+		return NULL;
+	}
+
+	if (!init_data) {
+		BREAK_TO_DEBUGGER();
+		return NULL;
+	}
+
+	if (!init_data->link) {
+		BREAK_TO_DEBUGGER();
+		return NULL;
+	}
+
+	dc_sink = dc_sink_create(init_data);
+
+	if (!dc_sink)
+		return NULL;
+
+	memmove(dc_sink->dc_edid.raw_edid, edid, len);
+	dc_sink->dc_edid.length = len;
+
+	if (!link_add_remote_sink_helper(
+			link,
+			dc_sink))
+		goto fail_add_sink;
+
+	edid_status = dm_helpers_parse_edid_caps(
+			link,
+			&dc_sink->dc_edid,
+			&dc_sink->edid_caps);
+
+	/*
+	 * Treat device as no EDID device if EDID
+	 * parsing fails
+	 */
+	if (edid_status != EDID_OK && edid_status != EDID_PARTIAL_VALID) {
+		dc_sink->dc_edid.length = 0;
+		dm_error("Bad EDID, status%d!\n", edid_status);
+	}
+
+	return dc_sink;
+
+fail_add_sink:
+	dc_sink_release(dc_sink);
+	return NULL;
+}
+
+void link_remove_remote_sink(struct dc_link *link, struct dc_sink *sink)
+{
+	int i;
+
+	if (!link->sink_count) {
+		BREAK_TO_DEBUGGER();
+		return;
+	}
+
+	for (i = 0; i < link->sink_count; i++) {
+		if (link->remote_sinks[i] == sink) {
+			dc_sink_release(sink);
+			link->remote_sinks[i] = NULL;
+
+			/* shrink array to remove empty place */
+			while (i < link->sink_count - 1) {
+				link->remote_sinks[i] = link->remote_sinks[i+1];
+				i++;
+			}
+			link->remote_sinks[i] = NULL;
+			link->sink_count--;
+			return;
+		}
+	}
+}
diff --git a/drivers/gpu/drm/amd/display/dc/link/link_detection.h b/drivers/gpu/drm/amd/display/dc/link/link_detection.h
new file mode 100644
index 000000000..7da050787
--- /dev/null
+++ b/drivers/gpu/drm/amd/display/dc/link/link_detection.h
@@ -0,0 +1,43 @@
+/*
+ * Copyright 2023 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 __DC_LINK_DETECTION_H__
+#define __DC_LINK_DETECTION_H__
+#include "link.h"
+bool link_detect(struct dc_link *link, enum dc_detect_reason reason);
+bool link_detect_connection_type(struct dc_link *link,
+		enum dc_connection_type *type);
+struct dc_sink *link_add_remote_sink(
+		struct dc_link *link,
+		const uint8_t *edid,
+		int len,
+		struct dc_sink_init_data *init_data);
+void link_remove_remote_sink(struct dc_link *link, struct dc_sink *sink);
+bool link_reset_cur_dp_mst_topology(struct dc_link *link);
+const struct dc_link_status *link_get_status(const struct dc_link *link);
+bool link_is_hdcp14(struct dc_link *link, enum signal_type signal);
+bool link_is_hdcp22(struct dc_link *link, enum signal_type signal);
+void link_clear_dprx_states(struct dc_link *link);
+#endif /* __DC_LINK_DETECTION_H__ */
diff --git a/drivers/gpu/drm/amd/display/dc/link/link_dpms.c b/drivers/gpu/drm/amd/display/dc/link/link_dpms.c
new file mode 100644
index 000000000..a96f07476
--- /dev/null
+++ b/drivers/gpu/drm/amd/display/dc/link/link_dpms.c
@@ -0,0 +1,2541 @@
+/*
+ * Copyright 2023 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
+ *
+ */
+
+/* FILE POLICY AND INTENDED USAGE:
+ * This file owns the programming sequence of stream's dpms state associated
+ * with the link and link's enable/disable sequences as result of the stream's
+ * dpms state change.
+ *
+ * TODO - The reason link owns stream's dpms programming sequence is
+ * because dpms programming sequence is highly dependent on underlying signal
+ * specific link protocols. This unfortunately causes link to own a portion of
+ * stream state programming sequence. This creates a gray area where the
+ * boundary between link and stream is not clearly defined.
+ */
+
+#include "link_dpms.h"
+#include "link_hwss.h"
+#include "link_validation.h"
+#include "accessories/link_fpga.h"
+#include "accessories/link_dp_trace.h"
+#include "protocols/link_dpcd.h"
+#include "protocols/link_ddc.h"
+#include "protocols/link_hpd.h"
+#include "protocols/link_dp_phy.h"
+#include "protocols/link_dp_capability.h"
+#include "protocols/link_dp_training.h"
+#include "protocols/link_edp_panel_control.h"
+#include "protocols/link_dp_dpia_bw.h"
+
+#include "dm_helpers.h"
+#include "link_enc_cfg.h"
+#include "resource.h"
+#include "dsc.h"
+#include "dccg.h"
+#include "clk_mgr.h"
+#include "atomfirmware.h"
+#define DC_LOGGER_INIT(logger)
+
+#define LINK_INFO(...) \
+	DC_LOG_HW_HOTPLUG(  \
+		__VA_ARGS__)
+
+#define RETIMER_REDRIVER_INFO(...) \
+	DC_LOG_RETIMER_REDRIVER(  \
+		__VA_ARGS__)
+#include "dc/dcn30/dcn30_vpg.h"
+
+#define MAX_MTP_SLOT_COUNT 64
+#define LINK_TRAINING_ATTEMPTS 4
+#define PEAK_FACTOR_X1000 1006
+
+void link_blank_all_dp_displays(struct dc *dc)
+{
+	unsigned int i;
+	uint8_t dpcd_power_state = '\0';
+	enum dc_status status = DC_ERROR_UNEXPECTED;
+
+	for (i = 0; i < dc->link_count; i++) {
+		if ((dc->links[i]->connector_signal != SIGNAL_TYPE_DISPLAY_PORT) ||
+			(dc->links[i]->priv == NULL) || (dc->links[i]->local_sink == NULL))
+			continue;
+
+		/* DP 2.0 spec requires that we read LTTPR caps first */
+		dp_retrieve_lttpr_cap(dc->links[i]);
+		/* if any of the displays are lit up turn them off */
+		status = core_link_read_dpcd(dc->links[i], DP_SET_POWER,
+							&dpcd_power_state, sizeof(dpcd_power_state));
+
+		if (status == DC_OK && dpcd_power_state == DP_POWER_STATE_D0)
+			link_blank_dp_stream(dc->links[i], true);
+	}
+
+}
+
+void link_blank_all_edp_displays(struct dc *dc)
+{
+	unsigned int i;
+	uint8_t dpcd_power_state = '\0';
+	enum dc_status status = DC_ERROR_UNEXPECTED;
+
+	for (i = 0; i < dc->link_count; i++) {
+		if ((dc->links[i]->connector_signal != SIGNAL_TYPE_EDP) ||
+			(!dc->links[i]->edp_sink_present))
+			continue;
+
+		/* if any of the displays are lit up turn them off */
+		status = core_link_read_dpcd(dc->links[i], DP_SET_POWER,
+							&dpcd_power_state, sizeof(dpcd_power_state));
+
+		if (status == DC_OK && dpcd_power_state == DP_POWER_STATE_D0)
+			link_blank_dp_stream(dc->links[i], true);
+	}
+}
+
+void link_blank_dp_stream(struct dc_link *link, bool hw_init)
+{
+	unsigned int j;
+	struct dc  *dc = link->ctx->dc;
+	enum signal_type signal = link->connector_signal;
+
+	if ((signal == SIGNAL_TYPE_EDP) ||
+		(signal == SIGNAL_TYPE_DISPLAY_PORT)) {
+		if (link->ep_type == DISPLAY_ENDPOINT_PHY &&
+			link->link_enc->funcs->get_dig_frontend &&
+			link->link_enc->funcs->is_dig_enabled(link->link_enc)) {
+			unsigned int fe = link->link_enc->funcs->get_dig_frontend(link->link_enc);
+
+			if (fe != ENGINE_ID_UNKNOWN)
+				for (j = 0; j < dc->res_pool->stream_enc_count; j++) {
+					if (fe == dc->res_pool->stream_enc[j]->id) {
+						dc->res_pool->stream_enc[j]->funcs->dp_blank(link,
+									dc->res_pool->stream_enc[j]);
+						break;
+					}
+				}
+		}
+
+		if ((!link->wa_flags.dp_keep_receiver_powered) || hw_init)
+			dpcd_write_rx_power_ctrl(link, false);
+	}
+}
+
+void link_set_all_streams_dpms_off_for_link(struct dc_link *link)
+{
+	struct pipe_ctx *pipes[MAX_PIPES];
+	struct dc_state *state = link->dc->current_state;
+	uint8_t count;
+	int i;
+	struct dc_stream_update stream_update;
+	bool dpms_off = true;
+	struct link_resource link_res = {0};
+
+	memset(&stream_update, 0, sizeof(stream_update));
+	stream_update.dpms_off = &dpms_off;
+
+	link_get_master_pipes_with_dpms_on(link, state, &count, pipes);
+
+	for (i = 0; i < count; i++) {
+		stream_update.stream = pipes[i]->stream;
+		dc_commit_updates_for_stream(link->ctx->dc, NULL, 0,
+				pipes[i]->stream, &stream_update,
+				state);
+	}
+
+	/* link can be also enabled by vbios. In this case it is not recorded
+	 * in pipe_ctx. Disable link phy here to make sure it is completely off
+	 */
+	dp_disable_link_phy(link, &link_res, link->connector_signal);
+}
+
+void link_resume(struct dc_link *link)
+{
+	if (link->connector_signal != SIGNAL_TYPE_VIRTUAL)
+		program_hpd_filter(link);
+}
+
+/* This function returns true if the pipe is used to feed video signal directly
+ * to the link.
+ */
+static bool is_master_pipe_for_link(const struct dc_link *link,
+		const struct pipe_ctx *pipe)
+{
+	return resource_is_pipe_type(pipe, OTG_MASTER) &&
+			pipe->stream->link == link;
+}
+
+/*
+ * This function finds all master pipes feeding to a given link with dpms set to
+ * on in given dc state.
+ */
+void link_get_master_pipes_with_dpms_on(const struct dc_link *link,
+		struct dc_state *state,
+		uint8_t *count,
+		struct pipe_ctx *pipes[MAX_PIPES])
+{
+	int i;
+	struct pipe_ctx *pipe = NULL;
+
+	*count = 0;
+	for (i = 0; i < MAX_PIPES; i++) {
+		pipe = &state->res_ctx.pipe_ctx[i];
+
+		if (is_master_pipe_for_link(link, pipe) &&
+				pipe->stream->dpms_off == false) {
+			pipes[(*count)++] = pipe;
+		}
+	}
+}
+
+static bool get_ext_hdmi_settings(struct pipe_ctx *pipe_ctx,
+		enum engine_id eng_id,
+		struct ext_hdmi_settings *settings)
+{
+	bool result = false;
+	int i = 0;
+	struct integrated_info *integrated_info =
+			pipe_ctx->stream->ctx->dc_bios->integrated_info;
+
+	if (integrated_info == NULL)
+		return false;
+
+	/*
+	 * Get retimer settings from sbios for passing SI eye test for DCE11
+	 * The setting values are varied based on board revision and port id
+	 * Therefore the setting values of each ports is passed by sbios.
+	 */
+
+	// Check if current bios contains ext Hdmi settings
+	if (integrated_info->gpu_cap_info & 0x20) {
+		switch (eng_id) {
+		case ENGINE_ID_DIGA:
+			settings->slv_addr = integrated_info->dp0_ext_hdmi_slv_addr;
+			settings->reg_num = integrated_info->dp0_ext_hdmi_6g_reg_num;
+			settings->reg_num_6g = integrated_info->dp0_ext_hdmi_6g_reg_num;
+			memmove(settings->reg_settings,
+					integrated_info->dp0_ext_hdmi_reg_settings,
+					sizeof(integrated_info->dp0_ext_hdmi_reg_settings));
+			memmove(settings->reg_settings_6g,
+					integrated_info->dp0_ext_hdmi_6g_reg_settings,
+					sizeof(integrated_info->dp0_ext_hdmi_6g_reg_settings));
+			result = true;
+			break;
+		case ENGINE_ID_DIGB:
+			settings->slv_addr = integrated_info->dp1_ext_hdmi_slv_addr;
+			settings->reg_num = integrated_info->dp1_ext_hdmi_6g_reg_num;
+			settings->reg_num_6g = integrated_info->dp1_ext_hdmi_6g_reg_num;
+			memmove(settings->reg_settings,
+					integrated_info->dp1_ext_hdmi_reg_settings,
+					sizeof(integrated_info->dp1_ext_hdmi_reg_settings));
+			memmove(settings->reg_settings_6g,
+					integrated_info->dp1_ext_hdmi_6g_reg_settings,
+					sizeof(integrated_info->dp1_ext_hdmi_6g_reg_settings));
+			result = true;
+			break;
+		case ENGINE_ID_DIGC:
+			settings->slv_addr = integrated_info->dp2_ext_hdmi_slv_addr;
+			settings->reg_num = integrated_info->dp2_ext_hdmi_6g_reg_num;
+			settings->reg_num_6g = integrated_info->dp2_ext_hdmi_6g_reg_num;
+			memmove(settings->reg_settings,
+					integrated_info->dp2_ext_hdmi_reg_settings,
+					sizeof(integrated_info->dp2_ext_hdmi_reg_settings));
+			memmove(settings->reg_settings_6g,
+					integrated_info->dp2_ext_hdmi_6g_reg_settings,
+					sizeof(integrated_info->dp2_ext_hdmi_6g_reg_settings));
+			result = true;
+			break;
+		case ENGINE_ID_DIGD:
+			settings->slv_addr = integrated_info->dp3_ext_hdmi_slv_addr;
+			settings->reg_num = integrated_info->dp3_ext_hdmi_6g_reg_num;
+			settings->reg_num_6g = integrated_info->dp3_ext_hdmi_6g_reg_num;
+			memmove(settings->reg_settings,
+					integrated_info->dp3_ext_hdmi_reg_settings,
+					sizeof(integrated_info->dp3_ext_hdmi_reg_settings));
+			memmove(settings->reg_settings_6g,
+					integrated_info->dp3_ext_hdmi_6g_reg_settings,
+					sizeof(integrated_info->dp3_ext_hdmi_6g_reg_settings));
+			result = true;
+			break;
+		default:
+			break;
+		}
+
+		if (result == true) {
+			// Validate settings from bios integrated info table
+			if (settings->slv_addr == 0)
+				return false;
+			if (settings->reg_num > 9)
+				return false;
+			if (settings->reg_num_6g > 3)
+				return false;
+
+			for (i = 0; i < settings->reg_num; i++) {
+				if (settings->reg_settings[i].i2c_reg_index > 0x20)
+					return false;
+			}
+
+			for (i = 0; i < settings->reg_num_6g; i++) {
+				if (settings->reg_settings_6g[i].i2c_reg_index > 0x20)
+					return false;
+			}
+		}
+	}
+
+	return result;
+}
+
+static bool write_i2c(struct pipe_ctx *pipe_ctx,
+		uint8_t address, uint8_t *buffer, uint32_t length)
+{
+	struct i2c_command cmd = {0};
+	struct i2c_payload payload = {0};
+
+	memset(&payload, 0, sizeof(payload));
+	memset(&cmd, 0, sizeof(cmd));
+
+	cmd.number_of_payloads = 1;
+	cmd.engine = I2C_COMMAND_ENGINE_DEFAULT;
+	cmd.speed = pipe_ctx->stream->ctx->dc->caps.i2c_speed_in_khz;
+
+	payload.address = address;
+	payload.data = buffer;
+	payload.length = length;
+	payload.write = true;
+	cmd.payloads = &payload;
+
+	if (dm_helpers_submit_i2c(pipe_ctx->stream->ctx,
+			pipe_ctx->stream->link, &cmd))
+		return true;
+
+	return false;
+}
+
+static void write_i2c_retimer_setting(
+		struct pipe_ctx *pipe_ctx,
+		bool is_vga_mode,
+		bool is_over_340mhz,
+		struct ext_hdmi_settings *settings)
+{
+	uint8_t slave_address = (settings->slv_addr >> 1);
+	uint8_t buffer[2];
+	const uint8_t apply_rx_tx_change = 0x4;
+	uint8_t offset = 0xA;
+	uint8_t value = 0;
+	int i = 0;
+	bool i2c_success = false;
+	DC_LOGGER_INIT(pipe_ctx->stream->ctx->logger);
+
+	memset(&buffer, 0, sizeof(buffer));
+
+	/* Start Ext-Hdmi programming*/
+
+	for (i = 0; i < settings->reg_num; i++) {
+		/* Apply 3G settings */
+		if (settings->reg_settings[i].i2c_reg_index <= 0x20) {
+
+			buffer[0] = settings->reg_settings[i].i2c_reg_index;
+			buffer[1] = settings->reg_settings[i].i2c_reg_val;
+			i2c_success = write_i2c(pipe_ctx, slave_address,
+						buffer, sizeof(buffer));
+			RETIMER_REDRIVER_INFO("retimer write to slave_address = 0x%x,\
+				offset = 0x%x, reg_val= 0x%x, i2c_success = %d\n",
+				slave_address, buffer[0], buffer[1], i2c_success?1:0);
+
+			if (!i2c_success)
+				goto i2c_write_fail;
+
+			/* Based on DP159 specs, APPLY_RX_TX_CHANGE bit in 0x0A
+			 * needs to be set to 1 on every 0xA-0xC write.
+			 */
+			if (settings->reg_settings[i].i2c_reg_index == 0xA ||
+				settings->reg_settings[i].i2c_reg_index == 0xB ||
+				settings->reg_settings[i].i2c_reg_index == 0xC) {
+
+				/* Query current value from offset 0xA */
+				if (settings->reg_settings[i].i2c_reg_index == 0xA)
+					value = settings->reg_settings[i].i2c_reg_val;
+				else {
+					i2c_success =
+						link_query_ddc_data(
+						pipe_ctx->stream->link->ddc,
+						slave_address, &offset, 1, &value, 1);
+					if (!i2c_success)
+						goto i2c_write_fail;
+				}
+
+				buffer[0] = offset;
+				/* Set APPLY_RX_TX_CHANGE bit to 1 */
+				buffer[1] = value | apply_rx_tx_change;
+				i2c_success = write_i2c(pipe_ctx, slave_address,
+						buffer, sizeof(buffer));
+				RETIMER_REDRIVER_INFO("retimer write to slave_address = 0x%x,\
+					offset = 0x%x, reg_val = 0x%x, i2c_success = %d\n",
+					slave_address, buffer[0], buffer[1], i2c_success?1:0);
+				if (!i2c_success)
+					goto i2c_write_fail;
+			}
+		}
+	}
+
+	/* Apply 3G settings */
+	if (is_over_340mhz) {
+		for (i = 0; i < settings->reg_num_6g; i++) {
+			/* Apply 3G settings */
+			if (settings->reg_settings[i].i2c_reg_index <= 0x20) {
+
+				buffer[0] = settings->reg_settings_6g[i].i2c_reg_index;
+				buffer[1] = settings->reg_settings_6g[i].i2c_reg_val;
+				i2c_success = write_i2c(pipe_ctx, slave_address,
+							buffer, sizeof(buffer));
+				RETIMER_REDRIVER_INFO("above 340Mhz: retimer write to slave_address = 0x%x,\
+					offset = 0x%x, reg_val = 0x%x, i2c_success = %d\n",
+					slave_address, buffer[0], buffer[1], i2c_success?1:0);
+
+				if (!i2c_success)
+					goto i2c_write_fail;
+
+				/* Based on DP159 specs, APPLY_RX_TX_CHANGE bit in 0x0A
+				 * needs to be set to 1 on every 0xA-0xC write.
+				 */
+				if (settings->reg_settings_6g[i].i2c_reg_index == 0xA ||
+					settings->reg_settings_6g[i].i2c_reg_index == 0xB ||
+					settings->reg_settings_6g[i].i2c_reg_index == 0xC) {
+
+					/* Query current value from offset 0xA */
+					if (settings->reg_settings_6g[i].i2c_reg_index == 0xA)
+						value = settings->reg_settings_6g[i].i2c_reg_val;
+					else {
+						i2c_success =
+								link_query_ddc_data(
+								pipe_ctx->stream->link->ddc,
+								slave_address, &offset, 1, &value, 1);
+						if (!i2c_success)
+							goto i2c_write_fail;
+					}
+
+					buffer[0] = offset;
+					/* Set APPLY_RX_TX_CHANGE bit to 1 */
+					buffer[1] = value | apply_rx_tx_change;
+					i2c_success = write_i2c(pipe_ctx, slave_address,
+							buffer, sizeof(buffer));
+					RETIMER_REDRIVER_INFO("retimer write to slave_address = 0x%x,\
+						offset = 0x%x, reg_val = 0x%x, i2c_success = %d\n",
+						slave_address, buffer[0], buffer[1], i2c_success?1:0);
+					if (!i2c_success)
+						goto i2c_write_fail;
+				}
+			}
+		}
+	}
+
+	if (is_vga_mode) {
+		/* Program additional settings if using 640x480 resolution */
+
+		/* Write offset 0xFF to 0x01 */
+		buffer[0] = 0xff;
+		buffer[1] = 0x01;
+		i2c_success = write_i2c(pipe_ctx, slave_address,
+				buffer, sizeof(buffer));
+		RETIMER_REDRIVER_INFO("retimer write to slave_address = 0x%x,\
+				offset = 0x%x, reg_val = 0x%x, i2c_success = %d\n",
+				slave_address, buffer[0], buffer[1], i2c_success?1:0);
+		if (!i2c_success)
+			goto i2c_write_fail;
+
+		/* Write offset 0x00 to 0x23 */
+		buffer[0] = 0x00;
+		buffer[1] = 0x23;
+		i2c_success = write_i2c(pipe_ctx, slave_address,
+				buffer, sizeof(buffer));
+		RETIMER_REDRIVER_INFO("retimer write to slave_address = 0x%x,\
+			offset = 0x%x, reg_val = 0x%x, i2c_success = %d\n",
+			slave_address, buffer[0], buffer[1], i2c_success?1:0);
+		if (!i2c_success)
+			goto i2c_write_fail;
+
+		/* Write offset 0xff to 0x00 */
+		buffer[0] = 0xff;
+		buffer[1] = 0x00;
+		i2c_success = write_i2c(pipe_ctx, slave_address,
+				buffer, sizeof(buffer));
+		RETIMER_REDRIVER_INFO("retimer write to slave_address = 0x%x,\
+			offset = 0x%x, reg_val = 0x%x, i2c_success = %d\n",
+			slave_address, buffer[0], buffer[1], i2c_success?1:0);
+		if (!i2c_success)
+			goto i2c_write_fail;
+
+	}
+
+	return;
+
+i2c_write_fail:
+	DC_LOG_DEBUG("Set retimer failed");
+}
+
+static void write_i2c_default_retimer_setting(
+		struct pipe_ctx *pipe_ctx,
+		bool is_vga_mode,
+		bool is_over_340mhz)
+{
+	uint8_t slave_address = (0xBA >> 1);
+	uint8_t buffer[2];
+	bool i2c_success = false;
+	DC_LOGGER_INIT(pipe_ctx->stream->ctx->logger);
+
+	memset(&buffer, 0, sizeof(buffer));
+
+	/* Program Slave Address for tuning single integrity */
+	/* Write offset 0x0A to 0x13 */
+	buffer[0] = 0x0A;
+	buffer[1] = 0x13;
+	i2c_success = write_i2c(pipe_ctx, slave_address,
+			buffer, sizeof(buffer));
+	RETIMER_REDRIVER_INFO("retimer writes default setting to slave_address = 0x%x,\
+		offset = 0x%x, reg_val = 0x%x, i2c_success = %d\n",
+		slave_address, buffer[0], buffer[1], i2c_success?1:0);
+	if (!i2c_success)
+		goto i2c_write_fail;
+
+	/* Write offset 0x0A to 0x17 */
+	buffer[0] = 0x0A;
+	buffer[1] = 0x17;
+	i2c_success = write_i2c(pipe_ctx, slave_address,
+			buffer, sizeof(buffer));
+	RETIMER_REDRIVER_INFO("retimer write to slave_addr = 0x%x,\
+		offset = 0x%x, reg_val = 0x%x, i2c_success = %d\n",
+		slave_address, buffer[0], buffer[1], i2c_success?1:0);
+	if (!i2c_success)
+		goto i2c_write_fail;
+
+	/* Write offset 0x0B to 0xDA or 0xD8 */
+	buffer[0] = 0x0B;
+	buffer[1] = is_over_340mhz ? 0xDA : 0xD8;
+	i2c_success = write_i2c(pipe_ctx, slave_address,
+			buffer, sizeof(buffer));
+	RETIMER_REDRIVER_INFO("retimer write to slave_addr = 0x%x,\
+		offset = 0x%x, reg_val = 0x%x, i2c_success = %d\n",
+		slave_address, buffer[0], buffer[1], i2c_success?1:0);
+	if (!i2c_success)
+		goto i2c_write_fail;
+
+	/* Write offset 0x0A to 0x17 */
+	buffer[0] = 0x0A;
+	buffer[1] = 0x17;
+	i2c_success = write_i2c(pipe_ctx, slave_address,
+			buffer, sizeof(buffer));
+	RETIMER_REDRIVER_INFO("retimer write to slave_addr = 0x%x,\
+		offset = 0x%x, reg_val= 0x%x, i2c_success = %d\n",
+		slave_address, buffer[0], buffer[1], i2c_success?1:0);
+	if (!i2c_success)
+		goto i2c_write_fail;
+
+	/* Write offset 0x0C to 0x1D or 0x91 */
+	buffer[0] = 0x0C;
+	buffer[1] = is_over_340mhz ? 0x1D : 0x91;
+	i2c_success = write_i2c(pipe_ctx, slave_address,
+			buffer, sizeof(buffer));
+	RETIMER_REDRIVER_INFO("retimer write to slave_addr = 0x%x,\
+		offset = 0x%x, reg_val = 0x%x, i2c_success = %d\n",
+		slave_address, buffer[0], buffer[1], i2c_success?1:0);
+	if (!i2c_success)
+		goto i2c_write_fail;
+
+	/* Write offset 0x0A to 0x17 */
+	buffer[0] = 0x0A;
+	buffer[1] = 0x17;
+	i2c_success = write_i2c(pipe_ctx, slave_address,
+			buffer, sizeof(buffer));
+	RETIMER_REDRIVER_INFO("retimer write to slave_addr = 0x%x,\
+		offset = 0x%x, reg_val = 0x%x, i2c_success = %d\n",
+		slave_address, buffer[0], buffer[1], i2c_success?1:0);
+	if (!i2c_success)
+		goto i2c_write_fail;
+
+
+	if (is_vga_mode) {
+		/* Program additional settings if using 640x480 resolution */
+
+		/* Write offset 0xFF to 0x01 */
+		buffer[0] = 0xff;
+		buffer[1] = 0x01;
+		i2c_success = write_i2c(pipe_ctx, slave_address,
+				buffer, sizeof(buffer));
+		RETIMER_REDRIVER_INFO("retimer write to slave_addr = 0x%x,\
+			offset = 0x%x, reg_val = 0x%x, i2c_success = %d\n",
+			slave_address, buffer[0], buffer[1], i2c_success?1:0);
+		if (!i2c_success)
+			goto i2c_write_fail;
+
+		/* Write offset 0x00 to 0x23 */
+		buffer[0] = 0x00;
+		buffer[1] = 0x23;
+		i2c_success = write_i2c(pipe_ctx, slave_address,
+				buffer, sizeof(buffer));
+		RETIMER_REDRIVER_INFO("retimer write to slave_addr = 0x%x,\
+			offset = 0x%x, reg_val= 0x%x, i2c_success = %d\n",
+			slave_address, buffer[0], buffer[1], i2c_success?1:0);
+		if (!i2c_success)
+			goto i2c_write_fail;
+
+		/* Write offset 0xff to 0x00 */
+		buffer[0] = 0xff;
+		buffer[1] = 0x00;
+		i2c_success = write_i2c(pipe_ctx, slave_address,
+				buffer, sizeof(buffer));
+		RETIMER_REDRIVER_INFO("retimer write default setting to slave_addr = 0x%x,\
+			offset = 0x%x, reg_val= 0x%x, i2c_success = %d end here\n",
+			slave_address, buffer[0], buffer[1], i2c_success?1:0);
+		if (!i2c_success)
+			goto i2c_write_fail;
+	}
+
+	return;
+
+i2c_write_fail:
+	DC_LOG_DEBUG("Set default retimer failed");
+}
+
+static void write_i2c_redriver_setting(
+		struct pipe_ctx *pipe_ctx,
+		bool is_over_340mhz)
+{
+	uint8_t slave_address = (0xF0 >> 1);
+	uint8_t buffer[16];
+	bool i2c_success = false;
+	DC_LOGGER_INIT(pipe_ctx->stream->ctx->logger);
+
+	memset(&buffer, 0, sizeof(buffer));
+
+	// Program Slave Address for tuning single integrity
+	buffer[3] = 0x4E;
+	buffer[4] = 0x4E;
+	buffer[5] = 0x4E;
+	buffer[6] = is_over_340mhz ? 0x4E : 0x4A;
+
+	i2c_success = write_i2c(pipe_ctx, slave_address,
+					buffer, sizeof(buffer));
+	RETIMER_REDRIVER_INFO("redriver write 0 to all 16 reg offset expect following:\n\
+		\t slave_addr = 0x%x, offset[3] = 0x%x, offset[4] = 0x%x,\
+		offset[5] = 0x%x,offset[6] is_over_340mhz = 0x%x,\
+		i2c_success = %d\n",
+		slave_address, buffer[3], buffer[4], buffer[5], buffer[6], i2c_success?1:0);
+
+	if (!i2c_success)
+		DC_LOG_DEBUG("Set redriver failed");
+}
+
+static void update_psp_stream_config(struct pipe_ctx *pipe_ctx, bool dpms_off)
+{
+	struct cp_psp *cp_psp = &pipe_ctx->stream->ctx->cp_psp;
+	struct link_encoder *link_enc = NULL;
+	struct cp_psp_stream_config config = {0};
+	enum dp_panel_mode panel_mode =
+			dp_get_panel_mode(pipe_ctx->stream->link);
+
+	if (cp_psp == NULL || cp_psp->funcs.update_stream_config == NULL)
+		return;
+
+	link_enc = link_enc_cfg_get_link_enc(pipe_ctx->stream->link);
+	ASSERT(link_enc);
+	if (link_enc == NULL)
+		return;
+
+	/* otg instance */
+	config.otg_inst = (uint8_t) pipe_ctx->stream_res.tg->inst;
+
+	/* dig front end */
+	config.dig_fe = (uint8_t) pipe_ctx->stream_res.stream_enc->stream_enc_inst;
+
+	/* stream encoder index */
+	config.stream_enc_idx = pipe_ctx->stream_res.stream_enc->id - ENGINE_ID_DIGA;
+	if (dp_is_128b_132b_signal(pipe_ctx))
+		config.stream_enc_idx =
+				pipe_ctx->stream_res.hpo_dp_stream_enc->id - ENGINE_ID_HPO_DP_0;
+
+	/* dig back end */
+	config.dig_be = pipe_ctx->stream->link->link_enc_hw_inst;
+
+	/* link encoder index */
+	config.link_enc_idx = link_enc->transmitter - TRANSMITTER_UNIPHY_A;
+	if (dp_is_128b_132b_signal(pipe_ctx))
+		config.link_enc_idx = pipe_ctx->link_res.hpo_dp_link_enc->inst;
+
+	/* dio output index is dpia index for DPIA endpoint & dcio index by default */
+	if (pipe_ctx->stream->link->ep_type == DISPLAY_ENDPOINT_USB4_DPIA)
+		config.dio_output_idx = pipe_ctx->stream->link->link_id.enum_id - ENUM_ID_1;
+	else
+		config.dio_output_idx = link_enc->transmitter - TRANSMITTER_UNIPHY_A;
+
+
+	/* phy index */
+	config.phy_idx = resource_transmitter_to_phy_idx(
+			pipe_ctx->stream->link->dc, link_enc->transmitter);
+	if (pipe_ctx->stream->link->ep_type == DISPLAY_ENDPOINT_USB4_DPIA)
+		/* USB4 DPIA doesn't use PHY in our soc, initialize it to 0 */
+		config.phy_idx = 0;
+
+	/* stream properties */
+	config.assr_enabled = (panel_mode == DP_PANEL_MODE_EDP) ? 1 : 0;
+	config.mst_enabled = (pipe_ctx->stream->signal ==
+			SIGNAL_TYPE_DISPLAY_PORT_MST) ? 1 : 0;
+	config.dp2_enabled = dp_is_128b_132b_signal(pipe_ctx) ? 1 : 0;
+	config.usb4_enabled = (pipe_ctx->stream->link->ep_type == DISPLAY_ENDPOINT_USB4_DPIA) ?
+			1 : 0;
+	config.dpms_off = dpms_off;
+
+	/* dm stream context */
+	config.dm_stream_ctx = pipe_ctx->stream->dm_stream_context;
+
+	cp_psp->funcs.update_stream_config(cp_psp->handle, &config);
+}
+
+static void set_avmute(struct pipe_ctx *pipe_ctx, bool enable)
+{
+	struct dc  *dc = pipe_ctx->stream->ctx->dc;
+
+	if (!dc_is_hdmi_signal(pipe_ctx->stream->signal))
+		return;
+
+	dc->hwss.set_avmute(pipe_ctx, enable);
+}
+
+static void enable_mst_on_sink(struct dc_link *link, bool enable)
+{
+	unsigned char mstmCntl;
+
+	core_link_read_dpcd(link, DP_MSTM_CTRL, &mstmCntl, 1);
+	if (enable)
+		mstmCntl |= DP_MST_EN;
+	else
+		mstmCntl &= (~DP_MST_EN);
+
+	core_link_write_dpcd(link, DP_MSTM_CTRL, &mstmCntl, 1);
+}
+
+static void dsc_optc_config_log(struct display_stream_compressor *dsc,
+		struct dsc_optc_config *config)
+{
+	uint32_t precision = 1 << 28;
+	uint32_t bytes_per_pixel_int = config->bytes_per_pixel / precision;
+	uint32_t bytes_per_pixel_mod = config->bytes_per_pixel % precision;
+	uint64_t ll_bytes_per_pix_fraq = bytes_per_pixel_mod;
+	DC_LOGGER_INIT(dsc->ctx->logger);
+
+	/* 7 fractional digits decimal precision for bytes per pixel is enough because DSC
+	 * bits per pixel precision is 1/16th of a pixel, which means bytes per pixel precision is
+	 * 1/16/8 = 1/128 of a byte, or 0.0078125 decimal
+	 */
+	ll_bytes_per_pix_fraq *= 10000000;
+	ll_bytes_per_pix_fraq /= precision;
+
+	DC_LOG_DSC("\tbytes_per_pixel 0x%08x (%d.%07d)",
+			config->bytes_per_pixel, bytes_per_pixel_int, (uint32_t)ll_bytes_per_pix_fraq);
+	DC_LOG_DSC("\tis_pixel_format_444 %d", config->is_pixel_format_444);
+	DC_LOG_DSC("\tslice_width %d", config->slice_width);
+}
+
+static bool dp_set_dsc_on_rx(struct pipe_ctx *pipe_ctx, bool enable)
+{
+	struct dc *dc = pipe_ctx->stream->ctx->dc;
+	struct dc_stream_state *stream = pipe_ctx->stream;
+	bool result = false;
+
+	if (dc_is_virtual_signal(stream->signal))
+		result = true;
+	else
+		result = dm_helpers_dp_write_dsc_enable(dc->ctx, stream, enable);
+	return result;
+}
+
+/* The stream with these settings can be sent (unblanked) only after DSC was enabled on RX first,
+ * i.e. after dp_enable_dsc_on_rx() had been called
+ */
+void link_set_dsc_on_stream(struct pipe_ctx *pipe_ctx, bool enable)
+{
+	struct display_stream_compressor *dsc = pipe_ctx->stream_res.dsc;
+	struct dc_stream_state *stream = pipe_ctx->stream;
+	struct pipe_ctx *odm_pipe;
+	int opp_cnt = 1;
+	DC_LOGGER_INIT(dsc->ctx->logger);
+
+	for (odm_pipe = pipe_ctx->next_odm_pipe; odm_pipe; odm_pipe = odm_pipe->next_odm_pipe)
+		opp_cnt++;
+
+	if (enable) {
+		struct dsc_config dsc_cfg;
+		struct dsc_optc_config dsc_optc_cfg;
+		enum optc_dsc_mode optc_dsc_mode;
+
+		/* Enable DSC hw block */
+		dsc_cfg.pic_width = (stream->timing.h_addressable + stream->timing.h_border_left + stream->timing.h_border_right) / opp_cnt;
+		dsc_cfg.pic_height = stream->timing.v_addressable + stream->timing.v_border_top + stream->timing.v_border_bottom;
+		dsc_cfg.pixel_encoding = stream->timing.pixel_encoding;
+		dsc_cfg.color_depth = stream->timing.display_color_depth;
+		dsc_cfg.is_odm = pipe_ctx->next_odm_pipe ? true : false;
+		dsc_cfg.dc_dsc_cfg = stream->timing.dsc_cfg;
+		ASSERT(dsc_cfg.dc_dsc_cfg.num_slices_h % opp_cnt == 0);
+		dsc_cfg.dc_dsc_cfg.num_slices_h /= opp_cnt;
+
+		dsc->funcs->dsc_set_config(dsc, &dsc_cfg, &dsc_optc_cfg);
+		dsc->funcs->dsc_enable(dsc, pipe_ctx->stream_res.opp->inst);
+		for (odm_pipe = pipe_ctx->next_odm_pipe; odm_pipe; odm_pipe = odm_pipe->next_odm_pipe) {
+			struct display_stream_compressor *odm_dsc = odm_pipe->stream_res.dsc;
+
+			odm_dsc->funcs->dsc_set_config(odm_dsc, &dsc_cfg, &dsc_optc_cfg);
+			odm_dsc->funcs->dsc_enable(odm_dsc, odm_pipe->stream_res.opp->inst);
+		}
+		dsc_cfg.dc_dsc_cfg.num_slices_h *= opp_cnt;
+		dsc_cfg.pic_width *= opp_cnt;
+
+		optc_dsc_mode = dsc_optc_cfg.is_pixel_format_444 ? OPTC_DSC_ENABLED_444 : OPTC_DSC_ENABLED_NATIVE_SUBSAMPLED;
+
+		/* Enable DSC in encoder */
+		if (dc_is_dp_signal(stream->signal) && !dp_is_128b_132b_signal(pipe_ctx)) {
+			DC_LOG_DSC("Setting stream encoder DSC config for engine %d:", (int)pipe_ctx->stream_res.stream_enc->id);
+			dsc_optc_config_log(dsc, &dsc_optc_cfg);
+			pipe_ctx->stream_res.stream_enc->funcs->dp_set_dsc_config(pipe_ctx->stream_res.stream_enc,
+									optc_dsc_mode,
+									dsc_optc_cfg.bytes_per_pixel,
+									dsc_optc_cfg.slice_width);
+
+			/* PPS SDP is set elsewhere because it has to be done after DIG FE is connected to DIG BE */
+		}
+
+		/* Enable DSC in OPTC */
+		DC_LOG_DSC("Setting optc DSC config for tg instance %d:", pipe_ctx->stream_res.tg->inst);
+		dsc_optc_config_log(dsc, &dsc_optc_cfg);
+		pipe_ctx->stream_res.tg->funcs->set_dsc_config(pipe_ctx->stream_res.tg,
+							optc_dsc_mode,
+							dsc_optc_cfg.bytes_per_pixel,
+							dsc_optc_cfg.slice_width);
+	} else {
+		/* disable DSC in OPTC */
+		pipe_ctx->stream_res.tg->funcs->set_dsc_config(
+				pipe_ctx->stream_res.tg,
+				OPTC_DSC_DISABLED, 0, 0);
+
+		/* disable DSC in stream encoder */
+		if (dc_is_dp_signal(stream->signal)) {
+			if (dp_is_128b_132b_signal(pipe_ctx))
+				pipe_ctx->stream_res.hpo_dp_stream_enc->funcs->dp_set_dsc_pps_info_packet(
+										pipe_ctx->stream_res.hpo_dp_stream_enc,
+										false,
+										NULL,
+										true);
+			else {
+				pipe_ctx->stream_res.stream_enc->funcs->dp_set_dsc_config(
+						pipe_ctx->stream_res.stream_enc,
+						OPTC_DSC_DISABLED, 0, 0);
+				pipe_ctx->stream_res.stream_enc->funcs->dp_set_dsc_pps_info_packet(
+							pipe_ctx->stream_res.stream_enc, false, NULL, true);
+			}
+		}
+
+		/* disable DSC block */
+		pipe_ctx->stream_res.dsc->funcs->dsc_disable(pipe_ctx->stream_res.dsc);
+		for (odm_pipe = pipe_ctx->next_odm_pipe; odm_pipe; odm_pipe = odm_pipe->next_odm_pipe)
+			odm_pipe->stream_res.dsc->funcs->dsc_disable(odm_pipe->stream_res.dsc);
+	}
+}
+
+/*
+ * For dynamic bpp change case, dsc is programmed with MASTER_UPDATE_LOCK enabled;
+ * hence PPS info packet update need to use frame update instead of immediate update.
+ * Added parameter immediate_update for this purpose.
+ * The decision to use frame update is hard-coded in function dp_update_dsc_config(),
+ * which is the only place where a "false" would be passed in for param immediate_update.
+ *
+ * immediate_update is only applicable when DSC is enabled.
+ */
+bool link_set_dsc_pps_packet(struct pipe_ctx *pipe_ctx, bool enable, bool immediate_update)
+{
+	struct display_stream_compressor *dsc = pipe_ctx->stream_res.dsc;
+	struct dc_stream_state *stream = pipe_ctx->stream;
+
+	if (!pipe_ctx->stream->timing.flags.DSC)
+		return false;
+
+	if (!dsc)
+		return false;
+
+	DC_LOGGER_INIT(dsc->ctx->logger);
+
+	if (enable) {
+		struct dsc_config dsc_cfg;
+		uint8_t dsc_packed_pps[128];
+
+		memset(&dsc_cfg, 0, sizeof(dsc_cfg));
+		memset(dsc_packed_pps, 0, 128);
+
+		/* Enable DSC hw block */
+		dsc_cfg.pic_width = stream->timing.h_addressable + stream->timing.h_border_left + stream->timing.h_border_right;
+		dsc_cfg.pic_height = stream->timing.v_addressable + stream->timing.v_border_top + stream->timing.v_border_bottom;
+		dsc_cfg.pixel_encoding = stream->timing.pixel_encoding;
+		dsc_cfg.color_depth = stream->timing.display_color_depth;
+		dsc_cfg.is_odm = pipe_ctx->next_odm_pipe ? true : false;
+		dsc_cfg.dc_dsc_cfg = stream->timing.dsc_cfg;
+
+		dsc->funcs->dsc_get_packed_pps(dsc, &dsc_cfg, &dsc_packed_pps[0]);
+		memcpy(&stream->dsc_packed_pps[0], &dsc_packed_pps[0], sizeof(stream->dsc_packed_pps));
+		if (dc_is_dp_signal(stream->signal)) {
+			DC_LOG_DSC("Setting stream encoder DSC PPS SDP for engine %d\n", (int)pipe_ctx->stream_res.stream_enc->id);
+			if (dp_is_128b_132b_signal(pipe_ctx))
+				pipe_ctx->stream_res.hpo_dp_stream_enc->funcs->dp_set_dsc_pps_info_packet(
+										pipe_ctx->stream_res.hpo_dp_stream_enc,
+										true,
+										&dsc_packed_pps[0],
+										immediate_update);
+			else
+				pipe_ctx->stream_res.stream_enc->funcs->dp_set_dsc_pps_info_packet(
+						pipe_ctx->stream_res.stream_enc,
+						true,
+						&dsc_packed_pps[0],
+						immediate_update);
+		}
+	} else {
+		/* disable DSC PPS in stream encoder */
+		memset(&stream->dsc_packed_pps[0], 0, sizeof(stream->dsc_packed_pps));
+		if (dc_is_dp_signal(stream->signal)) {
+			if (dp_is_128b_132b_signal(pipe_ctx))
+				pipe_ctx->stream_res.hpo_dp_stream_enc->funcs->dp_set_dsc_pps_info_packet(
+										pipe_ctx->stream_res.hpo_dp_stream_enc,
+										false,
+										NULL,
+										true);
+			else
+				pipe_ctx->stream_res.stream_enc->funcs->dp_set_dsc_pps_info_packet(
+						pipe_ctx->stream_res.stream_enc, false, NULL, true);
+		}
+	}
+
+	return true;
+}
+
+bool link_set_dsc_enable(struct pipe_ctx *pipe_ctx, bool enable)
+{
+	struct display_stream_compressor *dsc = pipe_ctx->stream_res.dsc;
+	bool result = false;
+
+	if (!pipe_ctx->stream->timing.flags.DSC)
+		goto out;
+	if (!dsc)
+		goto out;
+
+	if (enable) {
+		{
+			link_set_dsc_on_stream(pipe_ctx, true);
+			result = true;
+		}
+	} else {
+		dp_set_dsc_on_rx(pipe_ctx, false);
+		link_set_dsc_on_stream(pipe_ctx, false);
+		result = true;
+	}
+out:
+	return result;
+}
+
+bool link_update_dsc_config(struct pipe_ctx *pipe_ctx)
+{
+	struct display_stream_compressor *dsc = pipe_ctx->stream_res.dsc;
+
+	if (!pipe_ctx->stream->timing.flags.DSC)
+		return false;
+	if (!dsc)
+		return false;
+
+	link_set_dsc_on_stream(pipe_ctx, true);
+	link_set_dsc_pps_packet(pipe_ctx, true, false);
+	return true;
+}
+
+static void enable_stream_features(struct pipe_ctx *pipe_ctx)
+{
+	struct dc_stream_state *stream = pipe_ctx->stream;
+
+	if (pipe_ctx->stream->signal != SIGNAL_TYPE_DISPLAY_PORT_MST) {
+		struct dc_link *link = stream->link;
+		union down_spread_ctrl old_downspread;
+		union down_spread_ctrl new_downspread;
+
+		memset(&old_downspread, 0, sizeof(old_downspread));
+
+		core_link_read_dpcd(link, DP_DOWNSPREAD_CTRL,
+				&old_downspread.raw, sizeof(old_downspread));
+
+		new_downspread.raw = old_downspread.raw;
+
+		new_downspread.bits.IGNORE_MSA_TIMING_PARAM =
+				(stream->ignore_msa_timing_param) ? 1 : 0;
+
+		if (new_downspread.raw != old_downspread.raw) {
+			core_link_write_dpcd(link, DP_DOWNSPREAD_CTRL,
+				&new_downspread.raw, sizeof(new_downspread));
+		}
+
+	} else {
+		dm_helpers_mst_enable_stream_features(stream);
+	}
+}
+
+static void log_vcp_x_y(const struct dc_link *link, struct fixed31_32 avg_time_slots_per_mtp)
+{
+	const uint32_t VCP_Y_PRECISION = 1000;
+	uint64_t vcp_x, vcp_y;
+	DC_LOGGER_INIT(link->ctx->logger);
+
+	// Add 0.5*(1/VCP_Y_PRECISION) to round up to decimal precision
+	avg_time_slots_per_mtp = dc_fixpt_add(
+			avg_time_slots_per_mtp,
+			dc_fixpt_from_fraction(
+				1,
+				2*VCP_Y_PRECISION));
+
+	vcp_x = dc_fixpt_floor(
+			avg_time_slots_per_mtp);
+	vcp_y = dc_fixpt_floor(
+			dc_fixpt_mul_int(
+				dc_fixpt_sub_int(
+					avg_time_slots_per_mtp,
+					dc_fixpt_floor(
+							avg_time_slots_per_mtp)),
+				VCP_Y_PRECISION));
+
+
+	if (link->type == dc_connection_mst_branch)
+		DC_LOG_DP2("MST Update Payload: set_throttled_vcp_size slot X.Y for MST stream "
+				"X: %llu "
+				"Y: %llu/%d",
+				vcp_x,
+				vcp_y,
+				VCP_Y_PRECISION);
+	else
+		DC_LOG_DP2("SST Update Payload: set_throttled_vcp_size slot X.Y for SST stream "
+				"X: %llu "
+				"Y: %llu/%d",
+				vcp_x,
+				vcp_y,
+				VCP_Y_PRECISION);
+}
+
+static struct fixed31_32 get_pbn_per_slot(struct dc_stream_state *stream)
+{
+	struct fixed31_32 mbytes_per_sec;
+	uint32_t link_rate_in_mbytes_per_sec = dp_link_bandwidth_kbps(stream->link,
+			&stream->link->cur_link_settings);
+	link_rate_in_mbytes_per_sec /= 8000; /* Kbits to MBytes */
+
+	mbytes_per_sec = dc_fixpt_from_int(link_rate_in_mbytes_per_sec);
+
+	return dc_fixpt_div_int(mbytes_per_sec, 54);
+}
+
+static struct fixed31_32 get_pbn_from_bw_in_kbps(uint64_t kbps)
+{
+	struct fixed31_32 peak_kbps;
+	uint32_t numerator = 0;
+	uint32_t denominator = 1;
+
+	/*
+	 * margin 5300ppm + 300ppm ~ 0.6% as per spec, factor is 1.006
+	 * The unit of 54/64Mbytes/sec is an arbitrary unit chosen based on
+	 * common multiplier to render an integer PBN for all link rate/lane
+	 * counts combinations
+	 * calculate
+	 * peak_kbps *= (1006/1000)
+	 * peak_kbps *= (64/54)
+	 * peak_kbps *= 8    convert to bytes
+	 */
+
+	numerator = 64 * PEAK_FACTOR_X1000;
+	denominator = 54 * 8 * 1000 * 1000;
+	kbps *= numerator;
+	peak_kbps = dc_fixpt_from_fraction(kbps, denominator);
+
+	return peak_kbps;
+}
+
+static struct fixed31_32 get_pbn_from_timing(struct pipe_ctx *pipe_ctx)
+{
+	uint64_t kbps;
+	enum dc_link_encoding_format link_encoding;
+
+	if (dp_is_128b_132b_signal(pipe_ctx))
+		link_encoding = DC_LINK_ENCODING_DP_128b_132b;
+	else
+		link_encoding = DC_LINK_ENCODING_DP_8b_10b;
+
+	kbps = dc_bandwidth_in_kbps_from_timing(&pipe_ctx->stream->timing, link_encoding);
+	return get_pbn_from_bw_in_kbps(kbps);
+}
+
+
+// TODO - DP2.0 Link: Fix get_lane_status to handle LTTPR offset (SST and MST)
+static void get_lane_status(
+	struct dc_link *link,
+	uint32_t lane_count,
+	union lane_status *status,
+	union lane_align_status_updated *status_updated)
+{
+	unsigned int lane;
+	uint8_t dpcd_buf[3] = {0};
+
+	if (status == NULL || status_updated == NULL) {
+		return;
+	}
+
+	core_link_read_dpcd(
+			link,
+			DP_LANE0_1_STATUS,
+			dpcd_buf,
+			sizeof(dpcd_buf));
+
+	for (lane = 0; lane < lane_count; lane++) {
+		status[lane].raw = dp_get_nibble_at_index(&dpcd_buf[0], lane);
+	}
+
+	status_updated->raw = dpcd_buf[2];
+}
+
+static bool poll_for_allocation_change_trigger(struct dc_link *link)
+{
+	/*
+	 * wait for ACT handled
+	 */
+	int i;
+	const int act_retries = 30;
+	enum act_return_status result = ACT_FAILED;
+	union payload_table_update_status update_status = {0};
+	union lane_status dpcd_lane_status[LANE_COUNT_DP_MAX];
+	union lane_align_status_updated lane_status_updated;
+	DC_LOGGER_INIT(link->ctx->logger);
+
+	if (link->aux_access_disabled)
+		return true;
+	for (i = 0; i < act_retries; i++) {
+		get_lane_status(link, link->cur_link_settings.lane_count, dpcd_lane_status, &lane_status_updated);
+
+		if (!dp_is_cr_done(link->cur_link_settings.lane_count, dpcd_lane_status) ||
+				!dp_is_ch_eq_done(link->cur_link_settings.lane_count, dpcd_lane_status) ||
+				!dp_is_symbol_locked(link->cur_link_settings.lane_count, dpcd_lane_status) ||
+				!dp_is_interlane_aligned(lane_status_updated)) {
+			DC_LOG_ERROR("SST Update Payload: Link loss occurred while "
+					"polling for ACT handled.");
+			result = ACT_LINK_LOST;
+			break;
+		}
+		core_link_read_dpcd(
+				link,
+				DP_PAYLOAD_TABLE_UPDATE_STATUS,
+				&update_status.raw,
+				1);
+
+		if (update_status.bits.ACT_HANDLED == 1) {
+			DC_LOG_DP2("SST Update Payload: ACT handled by downstream.");
+			result = ACT_SUCCESS;
+			break;
+		}
+
+		fsleep(5000);
+	}
+
+	if (result == ACT_FAILED) {
+		DC_LOG_ERROR("SST Update Payload: ACT still not handled after retries, "
+				"continue on. Something is wrong with the branch.");
+	}
+
+	return (result == ACT_SUCCESS);
+}
+
+static void update_mst_stream_alloc_table(
+	struct dc_link *link,
+	struct stream_encoder *stream_enc,
+	struct hpo_dp_stream_encoder *hpo_dp_stream_enc, // TODO: Rename stream_enc to dio_stream_enc?
+	const struct dc_dp_mst_stream_allocation_table *proposed_table)
+{
+	struct link_mst_stream_allocation work_table[MAX_CONTROLLER_NUM] = { 0 };
+	struct link_mst_stream_allocation *dc_alloc;
+
+	int i;
+	int j;
+
+	/* if DRM proposed_table has more than one new payload */
+	ASSERT(proposed_table->stream_count -
+			link->mst_stream_alloc_table.stream_count < 2);
+
+	/* copy proposed_table to link, add stream encoder */
+	for (i = 0; i < proposed_table->stream_count; i++) {
+
+		for (j = 0; j < link->mst_stream_alloc_table.stream_count; j++) {
+			dc_alloc =
+			&link->mst_stream_alloc_table.stream_allocations[j];
+
+			if (dc_alloc->vcp_id ==
+				proposed_table->stream_allocations[i].vcp_id) {
+
+				work_table[i] = *dc_alloc;
+				work_table[i].slot_count = proposed_table->stream_allocations[i].slot_count;
+				break; /* exit j loop */
+			}
+		}
+
+		/* new vcp_id */
+		if (j == link->mst_stream_alloc_table.stream_count) {
+			work_table[i].vcp_id =
+				proposed_table->stream_allocations[i].vcp_id;
+			work_table[i].slot_count =
+				proposed_table->stream_allocations[i].slot_count;
+			work_table[i].stream_enc = stream_enc;
+			work_table[i].hpo_dp_stream_enc = hpo_dp_stream_enc;
+		}
+	}
+
+	/* update link->mst_stream_alloc_table with work_table */
+	link->mst_stream_alloc_table.stream_count =
+			proposed_table->stream_count;
+	for (i = 0; i < MAX_CONTROLLER_NUM; i++)
+		link->mst_stream_alloc_table.stream_allocations[i] =
+				work_table[i];
+}
+
+static void remove_stream_from_alloc_table(
+		struct dc_link *link,
+		struct stream_encoder *dio_stream_enc,
+		struct hpo_dp_stream_encoder *hpo_dp_stream_enc)
+{
+	int i = 0;
+	struct link_mst_stream_allocation_table *table =
+			&link->mst_stream_alloc_table;
+
+	if (hpo_dp_stream_enc) {
+		for (; i < table->stream_count; i++)
+			if (hpo_dp_stream_enc == table->stream_allocations[i].hpo_dp_stream_enc)
+				break;
+	} else {
+		for (; i < table->stream_count; i++)
+			if (dio_stream_enc == table->stream_allocations[i].stream_enc)
+				break;
+	}
+
+	if (i < table->stream_count) {
+		i++;
+		for (; i < table->stream_count; i++)
+			table->stream_allocations[i-1] = table->stream_allocations[i];
+		memset(&table->stream_allocations[table->stream_count-1], 0,
+				sizeof(struct link_mst_stream_allocation));
+		table->stream_count--;
+	}
+}
+
+static enum dc_status deallocate_mst_payload_with_temp_drm_wa(
+		struct pipe_ctx *pipe_ctx)
+{
+	struct dc_stream_state *stream = pipe_ctx->stream;
+	struct dc_link *link = stream->link;
+	struct dc_dp_mst_stream_allocation_table proposed_table = {0};
+	struct fixed31_32 avg_time_slots_per_mtp = dc_fixpt_from_int(0);
+	int i;
+	bool mst_mode = (link->type == dc_connection_mst_branch);
+	/* adjust for drm changes*/
+	const struct link_hwss *link_hwss = get_link_hwss(link, &pipe_ctx->link_res);
+	const struct dc_link_settings empty_link_settings = {0};
+	DC_LOGGER_INIT(link->ctx->logger);
+
+	if (link_hwss->ext.set_throttled_vcp_size)
+		link_hwss->ext.set_throttled_vcp_size(pipe_ctx, avg_time_slots_per_mtp);
+	if (link_hwss->ext.set_hblank_min_symbol_width)
+		link_hwss->ext.set_hblank_min_symbol_width(pipe_ctx,
+				&empty_link_settings,
+				avg_time_slots_per_mtp);
+
+	if (dm_helpers_dp_mst_write_payload_allocation_table(
+			stream->ctx,
+			stream,
+			&proposed_table,
+			false))
+		update_mst_stream_alloc_table(
+				link,
+				pipe_ctx->stream_res.stream_enc,
+				pipe_ctx->stream_res.hpo_dp_stream_enc,
+				&proposed_table);
+	else
+		DC_LOG_WARNING("Failed to update"
+				"MST allocation table for"
+				"pipe idx:%d\n",
+				pipe_ctx->pipe_idx);
+
+	DC_LOG_MST("%s"
+			"stream_count: %d: ",
+			__func__,
+			link->mst_stream_alloc_table.stream_count);
+
+	for (i = 0; i < MAX_CONTROLLER_NUM; i++) {
+		DC_LOG_MST("stream_enc[%d]: %p      "
+		"stream[%d].hpo_dp_stream_enc: %p      "
+		"stream[%d].vcp_id: %d      "
+		"stream[%d].slot_count: %d\n",
+		i,
+		(void *) link->mst_stream_alloc_table.stream_allocations[i].stream_enc,
+		i,
+		(void *) link->mst_stream_alloc_table.stream_allocations[i].hpo_dp_stream_enc,
+		i,
+		link->mst_stream_alloc_table.stream_allocations[i].vcp_id,
+		i,
+		link->mst_stream_alloc_table.stream_allocations[i].slot_count);
+	}
+
+	if (link_hwss->ext.update_stream_allocation_table == NULL ||
+			link_dp_get_encoding_format(&link->cur_link_settings) == DP_UNKNOWN_ENCODING) {
+		DC_LOG_DEBUG("Unknown encoding format\n");
+		return DC_ERROR_UNEXPECTED;
+	}
+
+	link_hwss->ext.update_stream_allocation_table(link, &pipe_ctx->link_res,
+			&link->mst_stream_alloc_table);
+
+	if (mst_mode) {
+		dm_helpers_dp_mst_poll_for_allocation_change_trigger(
+			stream->ctx,
+			stream);
+	}
+
+	dm_helpers_dp_mst_send_payload_allocation(
+			stream->ctx,
+			stream,
+			false);
+
+	return DC_OK;
+}
+
+static enum dc_status deallocate_mst_payload(struct pipe_ctx *pipe_ctx)
+{
+	struct dc_stream_state *stream = pipe_ctx->stream;
+	struct dc_link *link = stream->link;
+	struct dc_dp_mst_stream_allocation_table proposed_table = {0};
+	struct fixed31_32 avg_time_slots_per_mtp = dc_fixpt_from_int(0);
+	int i;
+	bool mst_mode = (link->type == dc_connection_mst_branch);
+	const struct link_hwss *link_hwss = get_link_hwss(link, &pipe_ctx->link_res);
+	const struct dc_link_settings empty_link_settings = {0};
+	DC_LOGGER_INIT(link->ctx->logger);
+
+	if (link->dc->debug.temp_mst_deallocation_sequence)
+		return deallocate_mst_payload_with_temp_drm_wa(pipe_ctx);
+
+	/* deallocate_mst_payload is called before disable link. When mode or
+	 * disable/enable monitor, new stream is created which is not in link
+	 * stream[] yet. For this, payload is not allocated yet, so de-alloc
+	 * should not done. For new mode set, map_resources will get engine
+	 * for new stream, so stream_enc->id should be validated until here.
+	 */
+
+	/* slot X.Y */
+	if (link_hwss->ext.set_throttled_vcp_size)
+		link_hwss->ext.set_throttled_vcp_size(pipe_ctx, avg_time_slots_per_mtp);
+	if (link_hwss->ext.set_hblank_min_symbol_width)
+		link_hwss->ext.set_hblank_min_symbol_width(pipe_ctx,
+				&empty_link_settings,
+				avg_time_slots_per_mtp);
+
+	if (mst_mode) {
+		/* when link is in mst mode, reply on mst manager to remove
+		 * payload
+		 */
+		if (dm_helpers_dp_mst_write_payload_allocation_table(
+				stream->ctx,
+				stream,
+				&proposed_table,
+				false))
+			update_mst_stream_alloc_table(
+					link,
+					pipe_ctx->stream_res.stream_enc,
+					pipe_ctx->stream_res.hpo_dp_stream_enc,
+					&proposed_table);
+		else
+			DC_LOG_WARNING("Failed to update"
+					"MST allocation table for"
+					"pipe idx:%d\n",
+					pipe_ctx->pipe_idx);
+	} else {
+		/* when link is no longer in mst mode (mst hub unplugged),
+		 * remove payload with default dc logic
+		 */
+		remove_stream_from_alloc_table(link, pipe_ctx->stream_res.stream_enc,
+				pipe_ctx->stream_res.hpo_dp_stream_enc);
+	}
+
+	DC_LOG_MST("%s"
+			"stream_count: %d: ",
+			__func__,
+			link->mst_stream_alloc_table.stream_count);
+
+	for (i = 0; i < MAX_CONTROLLER_NUM; i++) {
+		DC_LOG_MST("stream_enc[%d]: %p      "
+		"stream[%d].hpo_dp_stream_enc: %p      "
+		"stream[%d].vcp_id: %d      "
+		"stream[%d].slot_count: %d\n",
+		i,
+		(void *) link->mst_stream_alloc_table.stream_allocations[i].stream_enc,
+		i,
+		(void *) link->mst_stream_alloc_table.stream_allocations[i].hpo_dp_stream_enc,
+		i,
+		link->mst_stream_alloc_table.stream_allocations[i].vcp_id,
+		i,
+		link->mst_stream_alloc_table.stream_allocations[i].slot_count);
+	}
+
+	/* update mst stream allocation table hardware state */
+	if (link_hwss->ext.update_stream_allocation_table == NULL ||
+			link_dp_get_encoding_format(&link->cur_link_settings) == DP_UNKNOWN_ENCODING) {
+		DC_LOG_DEBUG("Unknown encoding format\n");
+		return DC_ERROR_UNEXPECTED;
+	}
+
+	link_hwss->ext.update_stream_allocation_table(link, &pipe_ctx->link_res,
+			&link->mst_stream_alloc_table);
+
+	if (mst_mode) {
+		dm_helpers_dp_mst_poll_for_allocation_change_trigger(
+			stream->ctx,
+			stream);
+
+		dm_helpers_dp_mst_send_payload_allocation(
+				stream->ctx,
+				stream,
+				false);
+	}
+
+	return DC_OK;
+}
+
+/* convert link_mst_stream_alloc_table to dm dp_mst_stream_alloc_table
+ * because stream_encoder is not exposed to dm
+ */
+static enum dc_status allocate_mst_payload(struct pipe_ctx *pipe_ctx)
+{
+	struct dc_stream_state *stream = pipe_ctx->stream;
+	struct dc_link *link = stream->link;
+	struct dc_dp_mst_stream_allocation_table proposed_table = {0};
+	struct fixed31_32 avg_time_slots_per_mtp;
+	struct fixed31_32 pbn;
+	struct fixed31_32 pbn_per_slot;
+	int i;
+	enum act_return_status ret;
+	const struct link_hwss *link_hwss = get_link_hwss(link, &pipe_ctx->link_res);
+	DC_LOGGER_INIT(link->ctx->logger);
+
+	/* enable_link_dp_mst already check link->enabled_stream_count
+	 * and stream is in link->stream[]. This is called during set mode,
+	 * stream_enc is available.
+	 */
+
+	/* get calculate VC payload for stream: stream_alloc */
+	if (dm_helpers_dp_mst_write_payload_allocation_table(
+		stream->ctx,
+		stream,
+		&proposed_table,
+		true))
+		update_mst_stream_alloc_table(
+					link,
+					pipe_ctx->stream_res.stream_enc,
+					pipe_ctx->stream_res.hpo_dp_stream_enc,
+					&proposed_table);
+	else
+		DC_LOG_WARNING("Failed to update"
+				"MST allocation table for"
+				"pipe idx:%d\n",
+				pipe_ctx->pipe_idx);
+
+	DC_LOG_MST("%s  "
+			"stream_count: %d: \n ",
+			__func__,
+			link->mst_stream_alloc_table.stream_count);
+
+	for (i = 0; i < MAX_CONTROLLER_NUM; i++) {
+		DC_LOG_MST("stream_enc[%d]: %p      "
+		"stream[%d].hpo_dp_stream_enc: %p      "
+		"stream[%d].vcp_id: %d      "
+		"stream[%d].slot_count: %d\n",
+		i,
+		(void *) link->mst_stream_alloc_table.stream_allocations[i].stream_enc,
+		i,
+		(void *) link->mst_stream_alloc_table.stream_allocations[i].hpo_dp_stream_enc,
+		i,
+		link->mst_stream_alloc_table.stream_allocations[i].vcp_id,
+		i,
+		link->mst_stream_alloc_table.stream_allocations[i].slot_count);
+	}
+
+	ASSERT(proposed_table.stream_count > 0);
+
+	/* program DP source TX for payload */
+	if (link_hwss->ext.update_stream_allocation_table == NULL ||
+			link_dp_get_encoding_format(&link->cur_link_settings) == DP_UNKNOWN_ENCODING) {
+		DC_LOG_ERROR("Failure: unknown encoding format\n");
+		return DC_ERROR_UNEXPECTED;
+	}
+
+	link_hwss->ext.update_stream_allocation_table(link,
+			&pipe_ctx->link_res,
+			&link->mst_stream_alloc_table);
+
+	/* send down message */
+	ret = dm_helpers_dp_mst_poll_for_allocation_change_trigger(
+			stream->ctx,
+			stream);
+
+	if (ret != ACT_LINK_LOST) {
+		dm_helpers_dp_mst_send_payload_allocation(
+				stream->ctx,
+				stream,
+				true);
+	}
+
+	/* slot X.Y for only current stream */
+	pbn_per_slot = get_pbn_per_slot(stream);
+	if (pbn_per_slot.value == 0) {
+		DC_LOG_ERROR("Failure: pbn_per_slot==0 not allowed. Cannot continue, returning DC_UNSUPPORTED_VALUE.\n");
+		return DC_UNSUPPORTED_VALUE;
+	}
+	pbn = get_pbn_from_timing(pipe_ctx);
+	avg_time_slots_per_mtp = dc_fixpt_div(pbn, pbn_per_slot);
+
+	log_vcp_x_y(link, avg_time_slots_per_mtp);
+
+	if (link_hwss->ext.set_throttled_vcp_size)
+		link_hwss->ext.set_throttled_vcp_size(pipe_ctx, avg_time_slots_per_mtp);
+	if (link_hwss->ext.set_hblank_min_symbol_width)
+		link_hwss->ext.set_hblank_min_symbol_width(pipe_ctx,
+				&link->cur_link_settings,
+				avg_time_slots_per_mtp);
+
+	return DC_OK;
+}
+
+struct fixed31_32 link_calculate_sst_avg_time_slots_per_mtp(
+		const struct dc_stream_state *stream,
+		const struct dc_link *link)
+{
+	struct fixed31_32 link_bw_effective =
+			dc_fixpt_from_int(
+					dp_link_bandwidth_kbps(link, &link->cur_link_settings));
+	struct fixed31_32 timeslot_bw_effective =
+			dc_fixpt_div_int(link_bw_effective, MAX_MTP_SLOT_COUNT);
+	struct fixed31_32 timing_bw =
+			dc_fixpt_from_int(
+					dc_bandwidth_in_kbps_from_timing(&stream->timing,
+							dc_link_get_highest_encoding_format(link)));
+	struct fixed31_32 avg_time_slots_per_mtp =
+			dc_fixpt_div(timing_bw, timeslot_bw_effective);
+
+	return avg_time_slots_per_mtp;
+}
+
+
+static bool write_128b_132b_sst_payload_allocation_table(
+		const struct dc_stream_state *stream,
+		struct dc_link *link,
+		struct link_mst_stream_allocation_table *proposed_table,
+		bool allocate)
+{
+	const uint8_t vc_id = 1; /// VC ID always 1 for SST
+	const uint8_t start_time_slot = 0; /// Always start at time slot 0 for SST
+	bool result = false;
+	uint8_t req_slot_count = 0;
+	struct fixed31_32 avg_time_slots_per_mtp = { 0 };
+	union payload_table_update_status update_status = { 0 };
+	const uint32_t max_retries = 30;
+	uint32_t retries = 0;
+	DC_LOGGER_INIT(link->ctx->logger);
+
+	if (allocate)	{
+		avg_time_slots_per_mtp = link_calculate_sst_avg_time_slots_per_mtp(stream, link);
+		req_slot_count = dc_fixpt_ceil(avg_time_slots_per_mtp);
+		/// Validation should filter out modes that exceed link BW
+		ASSERT(req_slot_count <= MAX_MTP_SLOT_COUNT);
+		if (req_slot_count > MAX_MTP_SLOT_COUNT)
+			return false;
+	} else {
+		/// Leave req_slot_count = 0 if allocate is false.
+	}
+
+	proposed_table->stream_count = 1; /// Always 1 stream for SST
+	proposed_table->stream_allocations[0].slot_count = req_slot_count;
+	proposed_table->stream_allocations[0].vcp_id = vc_id;
+
+	if (link->aux_access_disabled)
+		return true;
+
+	/// Write DPCD 2C0 = 1 to start updating
+	update_status.bits.VC_PAYLOAD_TABLE_UPDATED = 1;
+	core_link_write_dpcd(
+			link,
+			DP_PAYLOAD_TABLE_UPDATE_STATUS,
+			&update_status.raw,
+			1);
+
+	/// Program the changes in DPCD 1C0 - 1C2
+	ASSERT(vc_id == 1);
+	core_link_write_dpcd(
+			link,
+			DP_PAYLOAD_ALLOCATE_SET,
+			&vc_id,
+			1);
+
+	ASSERT(start_time_slot == 0);
+	core_link_write_dpcd(
+			link,
+			DP_PAYLOAD_ALLOCATE_START_TIME_SLOT,
+			&start_time_slot,
+			1);
+
+	core_link_write_dpcd(
+			link,
+			DP_PAYLOAD_ALLOCATE_TIME_SLOT_COUNT,
+			&req_slot_count,
+			1);
+
+	/// Poll till DPCD 2C0 read 1
+	/// Try for at least 150ms (30 retries, with 5ms delay after each attempt)
+
+	while (retries < max_retries) {
+		if (core_link_read_dpcd(
+				link,
+				DP_PAYLOAD_TABLE_UPDATE_STATUS,
+				&update_status.raw,
+				1) == DC_OK) {
+			if (update_status.bits.VC_PAYLOAD_TABLE_UPDATED == 1) {
+				DC_LOG_DP2("SST Update Payload: downstream payload table updated.");
+				result = true;
+				break;
+			}
+		} else {
+			union dpcd_rev dpcdRev;
+
+			if (core_link_read_dpcd(
+					link,
+					DP_DPCD_REV,
+					&dpcdRev.raw,
+					1) != DC_OK) {
+				DC_LOG_ERROR("SST Update Payload: Unable to read DPCD revision "
+						"of sink while polling payload table "
+						"updated status bit.");
+				break;
+			}
+		}
+		retries++;
+		fsleep(5000);
+	}
+
+	if (!result && retries == max_retries) {
+		DC_LOG_ERROR("SST Update Payload: Payload table not updated after retries, "
+				"continue on. Something is wrong with the branch.");
+		// TODO - DP2.0 Payload: Read and log the payload table from downstream branch
+	}
+
+	return result;
+}
+
+/*
+ * Payload allocation/deallocation for SST introduced in DP2.0
+ */
+static enum dc_status update_sst_payload(struct pipe_ctx *pipe_ctx,
+						 bool allocate)
+{
+	struct dc_stream_state *stream = pipe_ctx->stream;
+	struct dc_link *link = stream->link;
+	struct link_mst_stream_allocation_table proposed_table = {0};
+	struct fixed31_32 avg_time_slots_per_mtp;
+	const struct dc_link_settings empty_link_settings = {0};
+	const struct link_hwss *link_hwss = get_link_hwss(link, &pipe_ctx->link_res);
+	DC_LOGGER_INIT(link->ctx->logger);
+
+	/* slot X.Y for SST payload deallocate */
+	if (!allocate) {
+		avg_time_slots_per_mtp = dc_fixpt_from_int(0);
+
+		log_vcp_x_y(link, avg_time_slots_per_mtp);
+
+		if (link_hwss->ext.set_throttled_vcp_size)
+			link_hwss->ext.set_throttled_vcp_size(pipe_ctx,
+					avg_time_slots_per_mtp);
+		if (link_hwss->ext.set_hblank_min_symbol_width)
+			link_hwss->ext.set_hblank_min_symbol_width(pipe_ctx,
+					&empty_link_settings,
+					avg_time_slots_per_mtp);
+	}
+
+	/* calculate VC payload and update branch with new payload allocation table*/
+	if (!write_128b_132b_sst_payload_allocation_table(
+			stream,
+			link,
+			&proposed_table,
+			allocate)) {
+		DC_LOG_ERROR("SST Update Payload: Failed to update "
+						"allocation table for "
+						"pipe idx: %d\n",
+						pipe_ctx->pipe_idx);
+		return DC_FAIL_DP_PAYLOAD_ALLOCATION;
+	}
+
+	proposed_table.stream_allocations[0].hpo_dp_stream_enc = pipe_ctx->stream_res.hpo_dp_stream_enc;
+
+	ASSERT(proposed_table.stream_count == 1);
+
+	//TODO - DP2.0 Logging: Instead of hpo_dp_stream_enc pointer, log instance id
+	DC_LOG_DP2("SST Update Payload: hpo_dp_stream_enc: %p      "
+		"vcp_id: %d      "
+		"slot_count: %d\n",
+		(void *) proposed_table.stream_allocations[0].hpo_dp_stream_enc,
+		proposed_table.stream_allocations[0].vcp_id,
+		proposed_table.stream_allocations[0].slot_count);
+
+	/* program DP source TX for payload */
+	link_hwss->ext.update_stream_allocation_table(link, &pipe_ctx->link_res,
+			&proposed_table);
+
+	/* poll for ACT handled */
+	if (!poll_for_allocation_change_trigger(link)) {
+		// Failures will result in blackscreen and errors logged
+		BREAK_TO_DEBUGGER();
+	}
+
+	/* slot X.Y for SST payload allocate */
+	if (allocate && link_dp_get_encoding_format(&link->cur_link_settings) ==
+			DP_128b_132b_ENCODING) {
+		avg_time_slots_per_mtp = link_calculate_sst_avg_time_slots_per_mtp(stream, link);
+
+		log_vcp_x_y(link, avg_time_slots_per_mtp);
+
+		if (link_hwss->ext.set_throttled_vcp_size)
+			link_hwss->ext.set_throttled_vcp_size(pipe_ctx,
+					avg_time_slots_per_mtp);
+		if (link_hwss->ext.set_hblank_min_symbol_width)
+			link_hwss->ext.set_hblank_min_symbol_width(pipe_ctx,
+					&link->cur_link_settings,
+					avg_time_slots_per_mtp);
+	}
+
+	/* Always return DC_OK.
+	 * If part of sequence fails, log failure(s) and show blackscreen
+	 */
+	return DC_OK;
+}
+
+enum dc_status link_reduce_mst_payload(struct pipe_ctx *pipe_ctx, uint32_t bw_in_kbps)
+{
+	struct dc_stream_state *stream = pipe_ctx->stream;
+	struct dc_link *link = stream->link;
+	struct fixed31_32 avg_time_slots_per_mtp;
+	struct fixed31_32 pbn;
+	struct fixed31_32 pbn_per_slot;
+	struct dc_dp_mst_stream_allocation_table proposed_table = {0};
+	uint8_t i;
+	const struct link_hwss *link_hwss = get_link_hwss(link, &pipe_ctx->link_res);
+	DC_LOGGER_INIT(link->ctx->logger);
+
+	/* decrease throttled vcp size */
+	pbn_per_slot = get_pbn_per_slot(stream);
+	pbn = get_pbn_from_bw_in_kbps(bw_in_kbps);
+	avg_time_slots_per_mtp = dc_fixpt_div(pbn, pbn_per_slot);
+
+	if (link_hwss->ext.set_throttled_vcp_size)
+		link_hwss->ext.set_throttled_vcp_size(pipe_ctx, avg_time_slots_per_mtp);
+	if (link_hwss->ext.set_hblank_min_symbol_width)
+		link_hwss->ext.set_hblank_min_symbol_width(pipe_ctx,
+				&link->cur_link_settings,
+				avg_time_slots_per_mtp);
+
+	/* send ALLOCATE_PAYLOAD sideband message with updated pbn */
+	dm_helpers_dp_mst_send_payload_allocation(
+			stream->ctx,
+			stream,
+			true);
+
+	/* notify immediate branch device table update */
+	if (dm_helpers_dp_mst_write_payload_allocation_table(
+			stream->ctx,
+			stream,
+			&proposed_table,
+			true)) {
+		/* update mst stream allocation table software state */
+		update_mst_stream_alloc_table(
+				link,
+				pipe_ctx->stream_res.stream_enc,
+				pipe_ctx->stream_res.hpo_dp_stream_enc,
+				&proposed_table);
+	} else {
+		DC_LOG_WARNING("Failed to update"
+				"MST allocation table for"
+				"pipe idx:%d\n",
+				pipe_ctx->pipe_idx);
+	}
+
+	DC_LOG_MST("%s  "
+			"stream_count: %d: \n ",
+			__func__,
+			link->mst_stream_alloc_table.stream_count);
+
+	for (i = 0; i < MAX_CONTROLLER_NUM; i++) {
+		DC_LOG_MST("stream_enc[%d]: %p      "
+		"stream[%d].hpo_dp_stream_enc: %p      "
+		"stream[%d].vcp_id: %d      "
+		"stream[%d].slot_count: %d\n",
+		i,
+		(void *) link->mst_stream_alloc_table.stream_allocations[i].stream_enc,
+		i,
+		(void *) link->mst_stream_alloc_table.stream_allocations[i].hpo_dp_stream_enc,
+		i,
+		link->mst_stream_alloc_table.stream_allocations[i].vcp_id,
+		i,
+		link->mst_stream_alloc_table.stream_allocations[i].slot_count);
+	}
+
+	ASSERT(proposed_table.stream_count > 0);
+
+	/* update mst stream allocation table hardware state */
+	if (link_hwss->ext.update_stream_allocation_table == NULL ||
+			link_dp_get_encoding_format(&link->cur_link_settings) == DP_UNKNOWN_ENCODING) {
+		DC_LOG_ERROR("Failure: unknown encoding format\n");
+		return DC_ERROR_UNEXPECTED;
+	}
+
+	link_hwss->ext.update_stream_allocation_table(link, &pipe_ctx->link_res,
+			&link->mst_stream_alloc_table);
+
+	/* poll for immediate branch device ACT handled */
+	dm_helpers_dp_mst_poll_for_allocation_change_trigger(
+			stream->ctx,
+			stream);
+
+	return DC_OK;
+}
+
+enum dc_status link_increase_mst_payload(struct pipe_ctx *pipe_ctx, uint32_t bw_in_kbps)
+{
+	struct dc_stream_state *stream = pipe_ctx->stream;
+	struct dc_link *link = stream->link;
+	struct fixed31_32 avg_time_slots_per_mtp;
+	struct fixed31_32 pbn;
+	struct fixed31_32 pbn_per_slot;
+	struct dc_dp_mst_stream_allocation_table proposed_table = {0};
+	uint8_t i;
+	enum act_return_status ret;
+	const struct link_hwss *link_hwss = get_link_hwss(link, &pipe_ctx->link_res);
+	DC_LOGGER_INIT(link->ctx->logger);
+
+	/* notify immediate branch device table update */
+	if (dm_helpers_dp_mst_write_payload_allocation_table(
+				stream->ctx,
+				stream,
+				&proposed_table,
+				true)) {
+		/* update mst stream allocation table software state */
+		update_mst_stream_alloc_table(
+				link,
+				pipe_ctx->stream_res.stream_enc,
+				pipe_ctx->stream_res.hpo_dp_stream_enc,
+				&proposed_table);
+	}
+
+	DC_LOG_MST("%s  "
+			"stream_count: %d: \n ",
+			__func__,
+			link->mst_stream_alloc_table.stream_count);
+
+	for (i = 0; i < MAX_CONTROLLER_NUM; i++) {
+		DC_LOG_MST("stream_enc[%d]: %p      "
+		"stream[%d].hpo_dp_stream_enc: %p      "
+		"stream[%d].vcp_id: %d      "
+		"stream[%d].slot_count: %d\n",
+		i,
+		(void *) link->mst_stream_alloc_table.stream_allocations[i].stream_enc,
+		i,
+		(void *) link->mst_stream_alloc_table.stream_allocations[i].hpo_dp_stream_enc,
+		i,
+		link->mst_stream_alloc_table.stream_allocations[i].vcp_id,
+		i,
+		link->mst_stream_alloc_table.stream_allocations[i].slot_count);
+	}
+
+	ASSERT(proposed_table.stream_count > 0);
+
+	/* update mst stream allocation table hardware state */
+	if (link_hwss->ext.update_stream_allocation_table == NULL ||
+			link_dp_get_encoding_format(&link->cur_link_settings) == DP_UNKNOWN_ENCODING) {
+		DC_LOG_ERROR("Failure: unknown encoding format\n");
+		return DC_ERROR_UNEXPECTED;
+	}
+
+	link_hwss->ext.update_stream_allocation_table(link, &pipe_ctx->link_res,
+			&link->mst_stream_alloc_table);
+
+	/* poll for immediate branch device ACT handled */
+	ret = dm_helpers_dp_mst_poll_for_allocation_change_trigger(
+			stream->ctx,
+			stream);
+
+	if (ret != ACT_LINK_LOST) {
+		/* send ALLOCATE_PAYLOAD sideband message with updated pbn */
+		dm_helpers_dp_mst_send_payload_allocation(
+				stream->ctx,
+				stream,
+				true);
+	}
+
+	/* increase throttled vcp size */
+	pbn = get_pbn_from_bw_in_kbps(bw_in_kbps);
+	pbn_per_slot = get_pbn_per_slot(stream);
+	avg_time_slots_per_mtp = dc_fixpt_div(pbn, pbn_per_slot);
+
+	if (link_hwss->ext.set_throttled_vcp_size)
+		link_hwss->ext.set_throttled_vcp_size(pipe_ctx, avg_time_slots_per_mtp);
+	if (link_hwss->ext.set_hblank_min_symbol_width)
+		link_hwss->ext.set_hblank_min_symbol_width(pipe_ctx,
+				&link->cur_link_settings,
+				avg_time_slots_per_mtp);
+
+	return DC_OK;
+}
+
+static void disable_link_dp(struct dc_link *link,
+		const struct link_resource *link_res,
+		enum signal_type signal)
+{
+	struct dc_link_settings link_settings = link->cur_link_settings;
+
+	if (signal == SIGNAL_TYPE_DISPLAY_PORT_MST &&
+			link->mst_stream_alloc_table.stream_count > 0)
+		/* disable MST link only when last vc payload is deallocated */
+		return;
+
+	dp_disable_link_phy(link, link_res, signal);
+
+	if (link->connector_signal == SIGNAL_TYPE_EDP) {
+		if (!link->skip_implict_edp_power_control)
+			link->dc->hwss.edp_power_control(link, false);
+	}
+
+	if (signal == SIGNAL_TYPE_DISPLAY_PORT_MST)
+		/* set the sink to SST mode after disabling the link */
+		enable_mst_on_sink(link, false);
+
+	if (link_dp_get_encoding_format(&link_settings) ==
+			DP_8b_10b_ENCODING) {
+		dp_set_fec_enable(link, false);
+		dp_set_fec_ready(link, link_res, false);
+	}
+}
+
+static void disable_link(struct dc_link *link,
+		const struct link_resource *link_res,
+		enum signal_type signal)
+{
+	if (dc_is_dp_signal(signal)) {
+		disable_link_dp(link, link_res, signal);
+	} else if (signal != SIGNAL_TYPE_VIRTUAL) {
+		link->dc->hwss.disable_link_output(link, link_res, signal);
+	}
+
+	if (signal == SIGNAL_TYPE_DISPLAY_PORT_MST) {
+		/* MST disable link only when no stream use the link */
+		if (link->mst_stream_alloc_table.stream_count <= 0)
+			link->link_status.link_active = false;
+	} else {
+		link->link_status.link_active = false;
+	}
+}
+
+static void enable_link_hdmi(struct pipe_ctx *pipe_ctx)
+{
+	struct dc_stream_state *stream = pipe_ctx->stream;
+	struct dc_link *link = stream->link;
+	enum dc_color_depth display_color_depth;
+	enum engine_id eng_id;
+	struct ext_hdmi_settings settings = {0};
+	bool is_over_340mhz = false;
+	bool is_vga_mode = (stream->timing.h_addressable == 640)
+			&& (stream->timing.v_addressable == 480);
+	struct dc *dc = pipe_ctx->stream->ctx->dc;
+	const struct link_hwss *link_hwss = get_link_hwss(link, &pipe_ctx->link_res);
+
+	if (stream->phy_pix_clk == 0)
+		stream->phy_pix_clk = stream->timing.pix_clk_100hz / 10;
+	if (stream->phy_pix_clk > 340000)
+		is_over_340mhz = true;
+
+	if (dc_is_hdmi_signal(pipe_ctx->stream->signal)) {
+		unsigned short masked_chip_caps = pipe_ctx->stream->link->chip_caps &
+				EXT_DISPLAY_PATH_CAPS__EXT_CHIP_MASK;
+		if (masked_chip_caps == EXT_DISPLAY_PATH_CAPS__HDMI20_TISN65DP159RSBT) {
+			/* DP159, Retimer settings */
+			eng_id = pipe_ctx->stream_res.stream_enc->id;
+
+			if (get_ext_hdmi_settings(pipe_ctx, eng_id, &settings)) {
+				write_i2c_retimer_setting(pipe_ctx,
+						is_vga_mode, is_over_340mhz, &settings);
+			} else {
+				write_i2c_default_retimer_setting(pipe_ctx,
+						is_vga_mode, is_over_340mhz);
+			}
+		} else if (masked_chip_caps == EXT_DISPLAY_PATH_CAPS__HDMI20_PI3EQX1204) {
+			/* PI3EQX1204, Redriver settings */
+			write_i2c_redriver_setting(pipe_ctx, is_over_340mhz);
+		}
+	}
+
+	if (dc_is_hdmi_signal(pipe_ctx->stream->signal))
+		write_scdc_data(
+			stream->link->ddc,
+			stream->phy_pix_clk,
+			stream->timing.flags.LTE_340MCSC_SCRAMBLE);
+
+	memset(&stream->link->cur_link_settings, 0,
+			sizeof(struct dc_link_settings));
+
+	display_color_depth = stream->timing.display_color_depth;
+	if (stream->timing.pixel_encoding == PIXEL_ENCODING_YCBCR422)
+		display_color_depth = COLOR_DEPTH_888;
+
+	/* We need to enable stream encoder for TMDS first to apply 1/4 TMDS
+	 * character clock in case that beyond 340MHz.
+	 */
+	if (dc_is_hdmi_tmds_signal(pipe_ctx->stream->signal))
+		link_hwss->setup_stream_encoder(pipe_ctx);
+
+	dc->hwss.enable_tmds_link_output(
+			link,
+			&pipe_ctx->link_res,
+			pipe_ctx->stream->signal,
+			pipe_ctx->clock_source->id,
+			display_color_depth,
+			stream->phy_pix_clk);
+
+	if (dc_is_hdmi_signal(pipe_ctx->stream->signal))
+		read_scdc_data(link->ddc);
+}
+
+static enum dc_status enable_link_dp(struct dc_state *state,
+				     struct pipe_ctx *pipe_ctx)
+{
+	struct dc_stream_state *stream = pipe_ctx->stream;
+	enum dc_status status;
+	bool skip_video_pattern;
+	struct dc_link *link = stream->link;
+	const struct dc_link_settings *link_settings =
+			&pipe_ctx->link_config.dp_link_settings;
+	bool fec_enable;
+	int i;
+	bool apply_seamless_boot_optimization = false;
+	uint32_t bl_oled_enable_delay = 50; // in ms
+	uint32_t post_oui_delay = 30; // 30ms
+	/* Reduce link bandwidth between failed link training attempts. */
+	bool do_fallback = false;
+	int lt_attempts = LINK_TRAINING_ATTEMPTS;
+
+	// Increase retry count if attempting DP1.x on FIXED_VS link
+	if ((link->chip_caps & EXT_DISPLAY_PATH_CAPS__DP_FIXED_VS_EN) &&
+			link_dp_get_encoding_format(link_settings) == DP_8b_10b_ENCODING)
+		lt_attempts = 10;
+
+	// check for seamless boot
+	for (i = 0; i < state->stream_count; i++) {
+		if (state->streams[i]->apply_seamless_boot_optimization) {
+			apply_seamless_boot_optimization = true;
+			break;
+		}
+	}
+
+	/*
+	 * If the link is DP-over-USB4 do the following:
+	 * - Train with fallback when enabling DPIA link. Conventional links are
+	 * trained with fallback during sink detection.
+	 * - Allocate only what the stream needs for bw in Gbps. Inform the CM
+	 * in case stream needs more or less bw from what has been allocated
+	 * earlier at plug time.
+	 */
+	if (link->ep_type == DISPLAY_ENDPOINT_USB4_DPIA) {
+		do_fallback = true;
+	}
+
+	/*
+	 * Temporary w/a to get DP2.0 link rates to work with SST.
+	 * TODO DP2.0 - Workaround: Remove w/a if and when the issue is resolved.
+	 */
+	if (link_dp_get_encoding_format(link_settings) == DP_128b_132b_ENCODING &&
+			pipe_ctx->stream->signal == SIGNAL_TYPE_DISPLAY_PORT &&
+			link->dc->debug.set_mst_en_for_sst) {
+		enable_mst_on_sink(link, true);
+	}
+	if (pipe_ctx->stream->signal == SIGNAL_TYPE_EDP) {
+		/*in case it is not on*/
+		if (!link->dc->config.edp_no_power_sequencing)
+			link->dc->hwss.edp_power_control(link, true);
+		link->dc->hwss.edp_wait_for_hpd_ready(link, true);
+	}
+
+	if (link_dp_get_encoding_format(link_settings) == DP_128b_132b_ENCODING) {
+		/* TODO - DP2.0 HW: calculate 32 symbol clock for HPO encoder */
+	} else {
+		pipe_ctx->stream_res.pix_clk_params.requested_sym_clk =
+				link_settings->link_rate * LINK_RATE_REF_FREQ_IN_KHZ;
+		if (state->clk_mgr && !apply_seamless_boot_optimization)
+			state->clk_mgr->funcs->update_clocks(state->clk_mgr,
+					state, false);
+	}
+
+	// during mode switch we do DP_SET_POWER off then on, and OUI is lost
+	dpcd_set_source_specific_data(link);
+	if (link->dpcd_sink_ext_caps.raw != 0) {
+		post_oui_delay += link->panel_config.pps.extra_post_OUI_ms;
+		msleep(post_oui_delay);
+	}
+
+	// similarly, mode switch can cause loss of cable ID
+	dpcd_write_cable_id_to_dprx(link);
+
+	skip_video_pattern = true;
+
+	if (link_settings->link_rate == LINK_RATE_LOW)
+		skip_video_pattern = false;
+
+	if (perform_link_training_with_retries(link_settings,
+					       skip_video_pattern,
+					       lt_attempts,
+					       pipe_ctx,
+					       pipe_ctx->stream->signal,
+					       do_fallback)) {
+		status = DC_OK;
+	} else {
+		status = DC_FAIL_DP_LINK_TRAINING;
+	}
+
+	if (link->preferred_training_settings.fec_enable)
+		fec_enable = *link->preferred_training_settings.fec_enable;
+	else
+		fec_enable = true;
+
+	if (link_dp_get_encoding_format(link_settings) == DP_8b_10b_ENCODING)
+		dp_set_fec_enable(link, fec_enable);
+
+	// during mode set we do DP_SET_POWER off then on, aux writes are lost
+	if (link->dpcd_sink_ext_caps.bits.oled == 1 ||
+		link->dpcd_sink_ext_caps.bits.sdr_aux_backlight_control == 1 ||
+		link->dpcd_sink_ext_caps.bits.hdr_aux_backlight_control == 1) {
+		set_default_brightness_aux(link);
+		if (link->dpcd_sink_ext_caps.bits.oled == 1)
+			msleep(bl_oled_enable_delay);
+		edp_backlight_enable_aux(link, true);
+	}
+
+	return status;
+}
+
+static enum dc_status enable_link_edp(
+		struct dc_state *state,
+		struct pipe_ctx *pipe_ctx)
+{
+	return enable_link_dp(state, pipe_ctx);
+}
+
+static void enable_link_lvds(struct pipe_ctx *pipe_ctx)
+{
+	struct dc_stream_state *stream = pipe_ctx->stream;
+	struct dc_link *link = stream->link;
+	struct dc *dc = stream->ctx->dc;
+
+	if (stream->phy_pix_clk == 0)
+		stream->phy_pix_clk = stream->timing.pix_clk_100hz / 10;
+
+	memset(&stream->link->cur_link_settings, 0,
+			sizeof(struct dc_link_settings));
+	dc->hwss.enable_lvds_link_output(
+			link,
+			&pipe_ctx->link_res,
+			pipe_ctx->clock_source->id,
+			stream->phy_pix_clk);
+
+}
+
+static enum dc_status enable_link_dp_mst(
+		struct dc_state *state,
+		struct pipe_ctx *pipe_ctx)
+{
+	struct dc_link *link = pipe_ctx->stream->link;
+	unsigned char mstm_cntl;
+
+	/* sink signal type after MST branch is MST. Multiple MST sinks
+	 * share one link. Link DP PHY is enable or training only once.
+	 */
+	if (link->link_status.link_active)
+		return DC_OK;
+
+	/* clear payload table */
+	core_link_read_dpcd(link, DP_MSTM_CTRL, &mstm_cntl, 1);
+	if (mstm_cntl & DP_MST_EN)
+		dm_helpers_dp_mst_clear_payload_allocation_table(link->ctx, link);
+
+	/* to make sure the pending down rep can be processed
+	 * before enabling the link
+	 */
+	dm_helpers_dp_mst_poll_pending_down_reply(link->ctx, link);
+
+	/* set the sink to MST mode before enabling the link */
+	enable_mst_on_sink(link, true);
+
+	return enable_link_dp(state, pipe_ctx);
+}
+
+static enum dc_status enable_link(
+		struct dc_state *state,
+		struct pipe_ctx *pipe_ctx)
+{
+	enum dc_status status = DC_ERROR_UNEXPECTED;
+	struct dc_stream_state *stream = pipe_ctx->stream;
+	struct dc_link *link = stream->link;
+
+	/* There's some scenarios where driver is unloaded with display
+	 * still enabled. When driver is reloaded, it may cause a display
+	 * to not light up if there is a mismatch between old and new
+	 * link settings. Need to call disable first before enabling at
+	 * new link settings.
+	 */
+	if (link->link_status.link_active)
+		disable_link(link, &pipe_ctx->link_res, pipe_ctx->stream->signal);
+
+	switch (pipe_ctx->stream->signal) {
+	case SIGNAL_TYPE_DISPLAY_PORT:
+		status = enable_link_dp(state, pipe_ctx);
+		break;
+	case SIGNAL_TYPE_EDP:
+		status = enable_link_edp(state, pipe_ctx);
+		break;
+	case SIGNAL_TYPE_DISPLAY_PORT_MST:
+		status = enable_link_dp_mst(state, pipe_ctx);
+		msleep(200);
+		break;
+	case SIGNAL_TYPE_DVI_SINGLE_LINK:
+	case SIGNAL_TYPE_DVI_DUAL_LINK:
+	case SIGNAL_TYPE_HDMI_TYPE_A:
+		enable_link_hdmi(pipe_ctx);
+		status = DC_OK;
+		break;
+	case SIGNAL_TYPE_LVDS:
+		enable_link_lvds(pipe_ctx);
+		status = DC_OK;
+		break;
+	case SIGNAL_TYPE_VIRTUAL:
+		status = DC_OK;
+		break;
+	default:
+		break;
+	}
+
+	if (status == DC_OK) {
+		pipe_ctx->stream->link->link_status.link_active = true;
+	}
+
+	return status;
+}
+
+void link_set_dpms_off(struct pipe_ctx *pipe_ctx)
+{
+	struct dc  *dc = pipe_ctx->stream->ctx->dc;
+	struct dc_stream_state *stream = pipe_ctx->stream;
+	struct dc_link *link = stream->sink->link;
+	struct vpg *vpg = pipe_ctx->stream_res.stream_enc->vpg;
+
+	ASSERT(is_master_pipe_for_link(link, pipe_ctx));
+
+	if (dp_is_128b_132b_signal(pipe_ctx))
+		vpg = pipe_ctx->stream_res.hpo_dp_stream_enc->vpg;
+
+	DC_LOGGER_INIT(pipe_ctx->stream->ctx->logger);
+
+	if (pipe_ctx->stream->sink) {
+		if (pipe_ctx->stream->sink->sink_signal != SIGNAL_TYPE_VIRTUAL &&
+			pipe_ctx->stream->sink->sink_signal != SIGNAL_TYPE_NONE) {
+			DC_LOG_DC("%s pipe_ctx dispname=%s signal=%x\n", __func__,
+			pipe_ctx->stream->sink->edid_caps.display_name,
+			pipe_ctx->stream->signal);
+		}
+	}
+
+	if (dc_is_virtual_signal(pipe_ctx->stream->signal))
+		return;
+
+	if (!pipe_ctx->stream->sink->edid_caps.panel_patch.skip_avmute) {
+		if (dc_is_hdmi_signal(pipe_ctx->stream->signal))
+			set_avmute(pipe_ctx, true);
+	}
+
+	dc->hwss.disable_audio_stream(pipe_ctx);
+
+	update_psp_stream_config(pipe_ctx, true);
+	dc->hwss.blank_stream(pipe_ctx);
+
+	if (pipe_ctx->stream->signal == SIGNAL_TYPE_DISPLAY_PORT_MST)
+		deallocate_mst_payload(pipe_ctx);
+	else if (pipe_ctx->stream->signal == SIGNAL_TYPE_DISPLAY_PORT &&
+			dp_is_128b_132b_signal(pipe_ctx))
+		update_sst_payload(pipe_ctx, false);
+
+	if (dc_is_hdmi_signal(pipe_ctx->stream->signal)) {
+		struct ext_hdmi_settings settings = {0};
+		enum engine_id eng_id = pipe_ctx->stream_res.stream_enc->id;
+
+		unsigned short masked_chip_caps = link->chip_caps &
+				EXT_DISPLAY_PATH_CAPS__EXT_CHIP_MASK;
+		//Need to inform that sink is going to use legacy HDMI mode.
+		write_scdc_data(
+			link->ddc,
+			165000,//vbios only handles 165Mhz.
+			false);
+		if (masked_chip_caps == EXT_DISPLAY_PATH_CAPS__HDMI20_TISN65DP159RSBT) {
+			/* DP159, Retimer settings */
+			if (get_ext_hdmi_settings(pipe_ctx, eng_id, &settings))
+				write_i2c_retimer_setting(pipe_ctx,
+						false, false, &settings);
+			else
+				write_i2c_default_retimer_setting(pipe_ctx,
+						false, false);
+		} else if (masked_chip_caps == EXT_DISPLAY_PATH_CAPS__HDMI20_PI3EQX1204) {
+			/* PI3EQX1204, Redriver settings */
+			write_i2c_redriver_setting(pipe_ctx, false);
+		}
+	}
+
+	if (pipe_ctx->stream->signal == SIGNAL_TYPE_DISPLAY_PORT &&
+			!dp_is_128b_132b_signal(pipe_ctx)) {
+
+		/* In DP1.x SST mode, our encoder will go to TPS1
+		 * when link is on but stream is off.
+		 * Disabling link before stream will avoid exposing TPS1 pattern
+		 * during the disable sequence as it will confuse some receivers
+		 * state machine.
+		 * In DP2 or MST mode, our encoder will stay video active
+		 */
+		disable_link(pipe_ctx->stream->link, &pipe_ctx->link_res, pipe_ctx->stream->signal);
+		dc->hwss.disable_stream(pipe_ctx);
+	} else {
+		dc->hwss.disable_stream(pipe_ctx);
+		disable_link(pipe_ctx->stream->link, &pipe_ctx->link_res, pipe_ctx->stream->signal);
+	}
+
+	if (pipe_ctx->stream->timing.flags.DSC) {
+		if (dc_is_dp_signal(pipe_ctx->stream->signal))
+			link_set_dsc_enable(pipe_ctx, false);
+	}
+	if (dp_is_128b_132b_signal(pipe_ctx)) {
+		if (pipe_ctx->stream_res.tg->funcs->set_out_mux)
+			pipe_ctx->stream_res.tg->funcs->set_out_mux(pipe_ctx->stream_res.tg, OUT_MUX_DIO);
+	}
+
+	if (vpg && vpg->funcs->vpg_powerdown)
+		vpg->funcs->vpg_powerdown(vpg);
+}
+
+void link_set_dpms_on(
+		struct dc_state *state,
+		struct pipe_ctx *pipe_ctx)
+{
+	struct dc *dc = pipe_ctx->stream->ctx->dc;
+	struct dc_stream_state *stream = pipe_ctx->stream;
+	struct dc_link *link = stream->sink->link;
+	enum dc_status status;
+	struct link_encoder *link_enc;
+	enum otg_out_mux_dest otg_out_dest = OUT_MUX_DIO;
+	struct vpg *vpg = pipe_ctx->stream_res.stream_enc->vpg;
+	const struct link_hwss *link_hwss = get_link_hwss(link, &pipe_ctx->link_res);
+	bool apply_edp_fast_boot_optimization =
+		pipe_ctx->stream->apply_edp_fast_boot_optimization;
+
+	ASSERT(is_master_pipe_for_link(link, pipe_ctx));
+
+	if (dp_is_128b_132b_signal(pipe_ctx))
+		vpg = pipe_ctx->stream_res.hpo_dp_stream_enc->vpg;
+
+	DC_LOGGER_INIT(pipe_ctx->stream->ctx->logger);
+
+	if (pipe_ctx->stream->sink) {
+		if (pipe_ctx->stream->sink->sink_signal != SIGNAL_TYPE_VIRTUAL &&
+			pipe_ctx->stream->sink->sink_signal != SIGNAL_TYPE_NONE) {
+			DC_LOG_DC("%s pipe_ctx dispname=%s signal=%x\n", __func__,
+			pipe_ctx->stream->sink->edid_caps.display_name,
+			pipe_ctx->stream->signal);
+		}
+	}
+
+	if (dc_is_virtual_signal(pipe_ctx->stream->signal))
+		return;
+
+	link_enc = link_enc_cfg_get_link_enc(link);
+	ASSERT(link_enc);
+
+	if (!dc_is_virtual_signal(pipe_ctx->stream->signal)
+			&& !dp_is_128b_132b_signal(pipe_ctx)) {
+		if (link_enc)
+			link_enc->funcs->setup(
+				link_enc,
+				pipe_ctx->stream->signal);
+	}
+
+	pipe_ctx->stream->link->link_state_valid = true;
+
+	if (pipe_ctx->stream_res.tg->funcs->set_out_mux) {
+		if (dp_is_128b_132b_signal(pipe_ctx))
+			otg_out_dest = OUT_MUX_HPO_DP;
+		else
+			otg_out_dest = OUT_MUX_DIO;
+		pipe_ctx->stream_res.tg->funcs->set_out_mux(pipe_ctx->stream_res.tg, otg_out_dest);
+	}
+
+	link_hwss->setup_stream_attribute(pipe_ctx);
+
+	pipe_ctx->stream->apply_edp_fast_boot_optimization = false;
+
+	// Enable VPG before building infoframe
+	if (vpg && vpg->funcs->vpg_poweron)
+		vpg->funcs->vpg_poweron(vpg);
+
+	resource_build_info_frame(pipe_ctx);
+	dc->hwss.update_info_frame(pipe_ctx);
+
+	if (dc_is_dp_signal(pipe_ctx->stream->signal))
+		dp_trace_source_sequence(link, DPCD_SOURCE_SEQ_AFTER_UPDATE_INFO_FRAME);
+
+	/* Do not touch link on seamless boot optimization. */
+	if (pipe_ctx->stream->apply_seamless_boot_optimization) {
+		pipe_ctx->stream->dpms_off = false;
+
+		/* Still enable stream features & audio on seamless boot for DP external displays */
+		if (pipe_ctx->stream->signal == SIGNAL_TYPE_DISPLAY_PORT) {
+			enable_stream_features(pipe_ctx);
+			dc->hwss.enable_audio_stream(pipe_ctx);
+		}
+
+		update_psp_stream_config(pipe_ctx, false);
+		return;
+	}
+
+	/* eDP lit up by bios already, no need to enable again. */
+	if (pipe_ctx->stream->signal == SIGNAL_TYPE_EDP &&
+				apply_edp_fast_boot_optimization &&
+				!pipe_ctx->stream->timing.flags.DSC &&
+				!pipe_ctx->next_odm_pipe) {
+		pipe_ctx->stream->dpms_off = false;
+		update_psp_stream_config(pipe_ctx, false);
+		return;
+	}
+
+	if (pipe_ctx->stream->dpms_off)
+		return;
+
+	/* Have to setup DSC before DIG FE and BE are connected (which happens before the
+	 * link training). This is to make sure the bandwidth sent to DIG BE won't be
+	 * bigger than what the link and/or DIG BE can handle. VBID[6]/CompressedStream_flag
+	 * will be automatically set at a later time when the video is enabled
+	 * (DP_VID_STREAM_EN = 1).
+	 */
+	if (pipe_ctx->stream->timing.flags.DSC) {
+		if (dc_is_dp_signal(pipe_ctx->stream->signal) ||
+			dc_is_virtual_signal(pipe_ctx->stream->signal))
+		link_set_dsc_enable(pipe_ctx, true);
+
+	}
+
+	status = enable_link(state, pipe_ctx);
+
+	if (status != DC_OK) {
+		DC_LOG_WARNING("enabling link %u failed: %d\n",
+		pipe_ctx->stream->link->link_index,
+		status);
+
+		/* Abort stream enable *unless* the failure was due to
+		 * DP link training - some DP monitors will recover and
+		 * show the stream anyway. But MST displays can't proceed
+		 * without link training.
+		 */
+		if (status != DC_FAIL_DP_LINK_TRAINING ||
+				pipe_ctx->stream->signal == SIGNAL_TYPE_DISPLAY_PORT_MST) {
+			if (false == stream->link->link_status.link_active)
+				disable_link(stream->link, &pipe_ctx->link_res,
+						pipe_ctx->stream->signal);
+			BREAK_TO_DEBUGGER();
+			return;
+		}
+	}
+
+	/* turn off otg test pattern if enable */
+	if (pipe_ctx->stream_res.tg->funcs->set_test_pattern)
+		pipe_ctx->stream_res.tg->funcs->set_test_pattern(pipe_ctx->stream_res.tg,
+				CONTROLLER_DP_TEST_PATTERN_VIDEOMODE,
+				COLOR_DEPTH_UNDEFINED);
+
+	/* This second call is needed to reconfigure the DIG
+	 * as a workaround for the incorrect value being applied
+	 * from transmitter control.
+	 */
+	if (!(dc_is_virtual_signal(pipe_ctx->stream->signal) ||
+			dp_is_128b_132b_signal(pipe_ctx))) {
+			if (link_enc)
+				link_enc->funcs->setup(
+					link_enc,
+					pipe_ctx->stream->signal);
+		}
+
+	dc->hwss.enable_stream(pipe_ctx);
+
+	/* Set DPS PPS SDP (AKA "info frames") */
+	if (pipe_ctx->stream->timing.flags.DSC) {
+		if (dc_is_dp_signal(pipe_ctx->stream->signal) ||
+				dc_is_virtual_signal(pipe_ctx->stream->signal)) {
+			dp_set_dsc_on_rx(pipe_ctx, true);
+			link_set_dsc_pps_packet(pipe_ctx, true, true);
+		}
+	}
+
+	if (pipe_ctx->stream->signal == SIGNAL_TYPE_DISPLAY_PORT_MST)
+		allocate_mst_payload(pipe_ctx);
+	else if (pipe_ctx->stream->signal == SIGNAL_TYPE_DISPLAY_PORT &&
+			dp_is_128b_132b_signal(pipe_ctx))
+		update_sst_payload(pipe_ctx, true);
+
+	dc->hwss.unblank_stream(pipe_ctx,
+		&pipe_ctx->stream->link->cur_link_settings);
+
+	if (stream->sink_patches.delay_ignore_msa > 0)
+		msleep(stream->sink_patches.delay_ignore_msa);
+
+	if (dc_is_dp_signal(pipe_ctx->stream->signal))
+		enable_stream_features(pipe_ctx);
+	update_psp_stream_config(pipe_ctx, false);
+
+	dc->hwss.enable_audio_stream(pipe_ctx);
+
+	if (dc_is_hdmi_signal(pipe_ctx->stream->signal)) {
+		set_avmute(pipe_ctx, false);
+	}
+}
diff --git a/drivers/gpu/drm/amd/display/dc/link/link_dpms.h b/drivers/gpu/drm/amd/display/dc/link/link_dpms.h
new file mode 100644
index 000000000..9398f9c16
--- /dev/null
+++ b/drivers/gpu/drm/amd/display/dc/link/link_dpms.h
@@ -0,0 +1,53 @@
+/*
+ * Copyright 2023 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 __DC_LINK_DPMS_H__
+#define __DC_LINK_DPMS_H__
+
+#include "link.h"
+void link_set_dpms_on(
+		struct dc_state *state,
+		struct pipe_ctx *pipe_ctx);
+void link_set_dpms_off(struct pipe_ctx *pipe_ctx);
+void link_resume(struct dc_link *link);
+void link_blank_all_dp_displays(struct dc *dc);
+void link_blank_all_edp_displays(struct dc *dc);
+void link_blank_dp_stream(struct dc_link *link, bool hw_init);
+void link_set_all_streams_dpms_off_for_link(struct dc_link *link);
+void link_get_master_pipes_with_dpms_on(const struct dc_link *link,
+		struct dc_state *state,
+		uint8_t *count,
+		struct pipe_ctx *pipes[MAX_PIPES]);
+enum dc_status link_increase_mst_payload(struct pipe_ctx *pipe_ctx, uint32_t req_pbn);
+enum dc_status link_reduce_mst_payload(struct pipe_ctx *pipe_ctx, uint32_t req_pbn);
+bool link_set_dsc_pps_packet(struct pipe_ctx *pipe_ctx,
+		bool enable, bool immediate_update);
+struct fixed31_32 link_calculate_sst_avg_time_slots_per_mtp(
+		const struct dc_stream_state *stream,
+		const struct dc_link *link);
+void link_set_dsc_on_stream(struct pipe_ctx *pipe_ctx, bool enable);
+bool link_set_dsc_enable(struct pipe_ctx *pipe_ctx, bool enable);
+bool link_update_dsc_config(struct pipe_ctx *pipe_ctx);
+#endif /* __DC_LINK_DPMS_H__ */
diff --git a/drivers/gpu/drm/amd/display/dc/link/link_factory.c b/drivers/gpu/drm/amd/display/dc/link/link_factory.c
new file mode 100644
index 000000000..2c366866f
--- /dev/null
+++ b/drivers/gpu/drm/amd/display/dc/link/link_factory.c
@@ -0,0 +1,867 @@
+/*
+ * Copyright 2023 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
+ *
+ */
+
+/* FILE POLICY AND INTENDED USAGE:
+ * This file owns the creation/destruction of link structure.
+ */
+#include "link_factory.h"
+#include "link_detection.h"
+#include "link_resource.h"
+#include "link_validation.h"
+#include "link_dpms.h"
+#include "accessories/link_dp_cts.h"
+#include "accessories/link_dp_trace.h"
+#include "accessories/link_fpga.h"
+#include "protocols/link_ddc.h"
+#include "protocols/link_dp_capability.h"
+#include "protocols/link_dp_dpia_bw.h"
+#include "protocols/link_dp_dpia.h"
+#include "protocols/link_dp_irq_handler.h"
+#include "protocols/link_dp_phy.h"
+#include "protocols/link_dp_training.h"
+#include "protocols/link_edp_panel_control.h"
+#include "protocols/link_hpd.h"
+#include "gpio_service_interface.h"
+#include "atomfirmware.h"
+
+#define DC_LOGGER_INIT(logger)
+
+#define LINK_INFO(...) \
+	DC_LOG_HW_HOTPLUG(  \
+		__VA_ARGS__)
+
+/* link factory owns the creation/destruction of link structures. */
+static void construct_link_service_factory(struct link_service *link_srv)
+{
+
+	link_srv->create_link = link_create;
+	link_srv->destroy_link = link_destroy;
+}
+
+/* link_detection manages link detection states and receiver states by using
+ * various link protocols. It also provides helper functions to interpret
+ * certain capabilities or status based on the states it manages or retrieve
+ * them directly from connected receivers.
+ */
+static void construct_link_service_detection(struct link_service *link_srv)
+{
+	link_srv->detect_link = link_detect;
+	link_srv->detect_connection_type = link_detect_connection_type;
+	link_srv->add_remote_sink = link_add_remote_sink;
+	link_srv->remove_remote_sink = link_remove_remote_sink;
+	link_srv->get_hpd_state = link_get_hpd_state;
+	link_srv->get_hpd_gpio = link_get_hpd_gpio;
+	link_srv->enable_hpd = link_enable_hpd;
+	link_srv->disable_hpd = link_disable_hpd;
+	link_srv->enable_hpd_filter = link_enable_hpd_filter;
+	link_srv->reset_cur_dp_mst_topology = link_reset_cur_dp_mst_topology;
+	link_srv->get_status = link_get_status;
+	link_srv->is_hdcp1x_supported = link_is_hdcp14;
+	link_srv->is_hdcp2x_supported = link_is_hdcp22;
+	link_srv->clear_dprx_states = link_clear_dprx_states;
+}
+
+/* link resource implements accessors to link resource. */
+static void construct_link_service_resource(struct link_service *link_srv)
+{
+	link_srv->get_cur_res_map = link_get_cur_res_map;
+	link_srv->restore_res_map = link_restore_res_map;
+	link_srv->get_cur_link_res = link_get_cur_link_res;
+}
+
+/* link validation owns timing validation against various link limitations. (ex.
+ * link bandwidth, receiver capability or our hardware capability) It also
+ * provides helper functions exposing bandwidth formulas used in validation.
+ */
+static void construct_link_service_validation(struct link_service *link_srv)
+{
+	link_srv->validate_mode_timing = link_validate_mode_timing;
+	link_srv->dp_link_bandwidth_kbps = dp_link_bandwidth_kbps;
+	link_srv->validate_dpia_bandwidth = link_validate_dpia_bandwidth;
+}
+
+/* link dpms owns the programming sequence of stream's dpms state associated
+ * with the link and link's enable/disable sequences as result of the stream's
+ * dpms state change.
+ */
+static void construct_link_service_dpms(struct link_service *link_srv)
+{
+	link_srv->set_dpms_on = link_set_dpms_on;
+	link_srv->set_dpms_off = link_set_dpms_off;
+	link_srv->resume = link_resume;
+	link_srv->blank_all_dp_displays = link_blank_all_dp_displays;
+	link_srv->blank_all_edp_displays = link_blank_all_edp_displays;
+	link_srv->blank_dp_stream = link_blank_dp_stream;
+	link_srv->increase_mst_payload = link_increase_mst_payload;
+	link_srv->reduce_mst_payload = link_reduce_mst_payload;
+	link_srv->set_dsc_on_stream = link_set_dsc_on_stream;
+	link_srv->set_dsc_enable = link_set_dsc_enable;
+	link_srv->update_dsc_config = link_update_dsc_config;
+}
+
+/* link ddc implements generic display communication protocols such as i2c, aux
+ * and scdc. It should not contain any specific applications of these
+ * protocols such as display capability query, detection, or handshaking such as
+ * link training.
+ */
+static void construct_link_service_ddc(struct link_service *link_srv)
+{
+	link_srv->create_ddc_service = link_create_ddc_service;
+	link_srv->destroy_ddc_service = link_destroy_ddc_service;
+	link_srv->query_ddc_data = link_query_ddc_data;
+	link_srv->aux_transfer_raw = link_aux_transfer_raw;
+	link_srv->configure_fixed_vs_pe_retimer = link_configure_fixed_vs_pe_retimer;
+	link_srv->aux_transfer_with_retries_no_mutex =
+			link_aux_transfer_with_retries_no_mutex;
+	link_srv->is_in_aux_transaction_mode = link_is_in_aux_transaction_mode;
+	link_srv->get_aux_defer_delay = link_get_aux_defer_delay;
+}
+
+/* link dp capability implements dp specific link capability retrieval sequence.
+ * It is responsible for retrieving, parsing, overriding, deciding capability
+ * obtained from dp link. Link capability consists of encoders, DPRXs, cables,
+ * retimers, usb and all other possible backend capabilities.
+ */
+static void construct_link_service_dp_capability(struct link_service *link_srv)
+{
+	link_srv->dp_is_sink_present = dp_is_sink_present;
+	link_srv->dp_is_fec_supported = dp_is_fec_supported;
+	link_srv->dp_is_128b_132b_signal = dp_is_128b_132b_signal;
+	link_srv->dp_get_max_link_enc_cap = dp_get_max_link_enc_cap;
+	link_srv->dp_get_verified_link_cap = dp_get_verified_link_cap;
+	link_srv->dp_get_encoding_format = link_dp_get_encoding_format;
+	link_srv->dp_should_enable_fec = dp_should_enable_fec;
+	link_srv->dp_decide_link_settings = link_decide_link_settings;
+	link_srv->mst_decide_link_encoding_format =
+			mst_decide_link_encoding_format;
+	link_srv->edp_decide_link_settings = edp_decide_link_settings;
+	link_srv->bw_kbps_from_raw_frl_link_rate_data =
+			link_bw_kbps_from_raw_frl_link_rate_data;
+	link_srv->dp_overwrite_extended_receiver_cap =
+			dp_overwrite_extended_receiver_cap;
+	link_srv->dp_decide_lttpr_mode = dp_decide_lttpr_mode;
+}
+
+/* link dp phy/dpia implements basic dp phy/dpia functionality such as
+ * enable/disable output and set lane/drive settings. It is responsible for
+ * maintaining and update software state representing current phy/dpia status
+ * such as current link settings.
+ */
+static void construct_link_service_dp_phy_or_dpia(struct link_service *link_srv)
+{
+	link_srv->dpia_handle_usb4_bandwidth_allocation_for_link =
+			dpia_handle_usb4_bandwidth_allocation_for_link;
+	link_srv->dpia_handle_bw_alloc_response = dpia_handle_bw_alloc_response;
+	link_srv->dp_set_drive_settings = dp_set_drive_settings;
+	link_srv->dpcd_write_rx_power_ctrl = dpcd_write_rx_power_ctrl;
+}
+
+/* link dp irq handler implements DP HPD short pulse handling sequence according
+ * to DP specifications
+ */
+static void construct_link_service_dp_irq_handler(struct link_service *link_srv)
+{
+	link_srv->dp_parse_link_loss_status = dp_parse_link_loss_status;
+	link_srv->dp_should_allow_hpd_rx_irq = dp_should_allow_hpd_rx_irq;
+	link_srv->dp_handle_link_loss = dp_handle_link_loss;
+	link_srv->dp_read_hpd_rx_irq_data = dp_read_hpd_rx_irq_data;
+	link_srv->dp_handle_hpd_rx_irq = dp_handle_hpd_rx_irq;
+}
+
+/* link edp panel control implements retrieval and configuration of eDP panel
+ * features such as PSR and ABM and it also manages specs defined eDP panel
+ * power sequences.
+ */
+static void construct_link_service_edp_panel_control(struct link_service *link_srv)
+{
+	link_srv->edp_panel_backlight_power_on = edp_panel_backlight_power_on;
+	link_srv->edp_get_backlight_level = edp_get_backlight_level;
+	link_srv->edp_get_backlight_level_nits = edp_get_backlight_level_nits;
+	link_srv->edp_set_backlight_level = edp_set_backlight_level;
+	link_srv->edp_set_backlight_level_nits = edp_set_backlight_level_nits;
+	link_srv->edp_get_target_backlight_pwm = edp_get_target_backlight_pwm;
+	link_srv->edp_get_psr_state = edp_get_psr_state;
+	link_srv->edp_set_psr_allow_active = edp_set_psr_allow_active;
+	link_srv->edp_setup_psr = edp_setup_psr;
+	link_srv->edp_set_sink_vtotal_in_psr_active =
+			edp_set_sink_vtotal_in_psr_active;
+	link_srv->edp_get_psr_residency = edp_get_psr_residency;
+
+	link_srv->edp_get_replay_state = edp_get_replay_state;
+	link_srv->edp_set_replay_allow_active = edp_set_replay_allow_active;
+	link_srv->edp_setup_replay = edp_setup_replay;
+	link_srv->edp_set_coasting_vtotal = edp_set_coasting_vtotal;
+	link_srv->edp_replay_residency = edp_replay_residency;
+
+	link_srv->edp_wait_for_t12 = edp_wait_for_t12;
+	link_srv->edp_is_ilr_optimization_required =
+			edp_is_ilr_optimization_required;
+	link_srv->edp_backlight_enable_aux = edp_backlight_enable_aux;
+	link_srv->edp_add_delay_for_T9 = edp_add_delay_for_T9;
+	link_srv->edp_receiver_ready_T9 = edp_receiver_ready_T9;
+	link_srv->edp_receiver_ready_T7 = edp_receiver_ready_T7;
+	link_srv->edp_power_alpm_dpcd_enable = edp_power_alpm_dpcd_enable;
+	link_srv->edp_set_panel_power = edp_set_panel_power;
+}
+
+/* link dp cts implements dp compliance test automation protocols and manual
+ * testing interfaces for debugging and certification purpose.
+ */
+static void construct_link_service_dp_cts(struct link_service *link_srv)
+{
+	link_srv->dp_handle_automated_test = dp_handle_automated_test;
+	link_srv->dp_set_test_pattern = dp_set_test_pattern;
+	link_srv->dp_set_preferred_link_settings =
+			dp_set_preferred_link_settings;
+	link_srv->dp_set_preferred_training_settings =
+			dp_set_preferred_training_settings;
+}
+
+/* link dp trace implements tracing interfaces for tracking major dp sequences
+ * including execution status and timestamps
+ */
+static void construct_link_service_dp_trace(struct link_service *link_srv)
+{
+	link_srv->dp_trace_is_initialized = dp_trace_is_initialized;
+	link_srv->dp_trace_set_is_logged_flag = dp_trace_set_is_logged_flag;
+	link_srv->dp_trace_is_logged = dp_trace_is_logged;
+	link_srv->dp_trace_get_lt_end_timestamp = dp_trace_get_lt_end_timestamp;
+	link_srv->dp_trace_get_lt_counts = dp_trace_get_lt_counts;
+	link_srv->dp_trace_get_link_loss_count = dp_trace_get_link_loss_count;
+	link_srv->dp_trace_set_edp_power_timestamp =
+			dp_trace_set_edp_power_timestamp;
+	link_srv->dp_trace_get_edp_poweron_timestamp =
+			dp_trace_get_edp_poweron_timestamp;
+	link_srv->dp_trace_get_edp_poweroff_timestamp =
+			dp_trace_get_edp_poweroff_timestamp;
+	link_srv->dp_trace_source_sequence = dp_trace_source_sequence;
+}
+
+static void construct_link_service(struct link_service *link_srv)
+{
+	/* All link service functions should fall under some sub categories.
+	 * If a new function doesn't perfectly fall under an existing sub
+	 * category, it must be that you are either adding a whole new aspect of
+	 * responsibility to link service or something doesn't belong to link
+	 * service. In that case please contact the arch owner to arrange a
+	 * design review meeting.
+	 */
+	construct_link_service_factory(link_srv);
+	construct_link_service_detection(link_srv);
+	construct_link_service_resource(link_srv);
+	construct_link_service_validation(link_srv);
+	construct_link_service_dpms(link_srv);
+	construct_link_service_ddc(link_srv);
+	construct_link_service_dp_capability(link_srv);
+	construct_link_service_dp_phy_or_dpia(link_srv);
+	construct_link_service_dp_irq_handler(link_srv);
+	construct_link_service_edp_panel_control(link_srv);
+	construct_link_service_dp_cts(link_srv);
+	construct_link_service_dp_trace(link_srv);
+}
+
+struct link_service *link_create_link_service(void)
+{
+	struct link_service *link_srv = kzalloc(sizeof(*link_srv), GFP_KERNEL);
+
+	if (link_srv == NULL)
+		goto fail;
+
+	construct_link_service(link_srv);
+
+	return link_srv;
+fail:
+	return NULL;
+}
+
+void link_destroy_link_service(struct link_service **link_srv)
+{
+	kfree(*link_srv);
+	*link_srv = NULL;
+}
+
+static enum transmitter translate_encoder_to_transmitter(
+		struct graphics_object_id encoder)
+{
+	switch (encoder.id) {
+	case ENCODER_ID_INTERNAL_UNIPHY:
+		switch (encoder.enum_id) {
+		case ENUM_ID_1:
+			return TRANSMITTER_UNIPHY_A;
+		case ENUM_ID_2:
+			return TRANSMITTER_UNIPHY_B;
+		default:
+			return TRANSMITTER_UNKNOWN;
+		}
+	break;
+	case ENCODER_ID_INTERNAL_UNIPHY1:
+		switch (encoder.enum_id) {
+		case ENUM_ID_1:
+			return TRANSMITTER_UNIPHY_C;
+		case ENUM_ID_2:
+			return TRANSMITTER_UNIPHY_D;
+		default:
+			return TRANSMITTER_UNKNOWN;
+		}
+	break;
+	case ENCODER_ID_INTERNAL_UNIPHY2:
+		switch (encoder.enum_id) {
+		case ENUM_ID_1:
+			return TRANSMITTER_UNIPHY_E;
+		case ENUM_ID_2:
+			return TRANSMITTER_UNIPHY_F;
+		default:
+			return TRANSMITTER_UNKNOWN;
+		}
+	break;
+	case ENCODER_ID_INTERNAL_UNIPHY3:
+		switch (encoder.enum_id) {
+		case ENUM_ID_1:
+			return TRANSMITTER_UNIPHY_G;
+		default:
+			return TRANSMITTER_UNKNOWN;
+		}
+	break;
+	case ENCODER_ID_EXTERNAL_NUTMEG:
+		switch (encoder.enum_id) {
+		case ENUM_ID_1:
+			return TRANSMITTER_NUTMEG_CRT;
+		default:
+			return TRANSMITTER_UNKNOWN;
+		}
+	break;
+	case ENCODER_ID_EXTERNAL_TRAVIS:
+		switch (encoder.enum_id) {
+		case ENUM_ID_1:
+			return TRANSMITTER_TRAVIS_CRT;
+		case ENUM_ID_2:
+			return TRANSMITTER_TRAVIS_LCD;
+		default:
+			return TRANSMITTER_UNKNOWN;
+		}
+	break;
+	default:
+		return TRANSMITTER_UNKNOWN;
+	}
+}
+
+static uint8_t translate_dig_inst_to_pwrseq_inst(struct dc_link *link)
+{
+	uint8_t pwrseq_inst = 0xF;
+
+	switch (link->eng_id) {
+	case ENGINE_ID_DIGA:
+		pwrseq_inst = 0;
+		break;
+	case ENGINE_ID_DIGB:
+		pwrseq_inst = 1;
+		break;
+	default:
+		DC_LOG_WARNING("Unsupported pwrseq engine id: %d!\n", link->eng_id);
+		ASSERT(false);
+		break;
+	}
+
+	return pwrseq_inst;
+}
+
+
+static void link_destruct(struct dc_link *link)
+{
+	int i;
+
+	if (link->hpd_gpio) {
+		dal_gpio_destroy_irq(&link->hpd_gpio);
+		link->hpd_gpio = NULL;
+	}
+
+	if (link->ddc)
+		link_destroy_ddc_service(&link->ddc);
+
+	if (link->panel_cntl)
+		link->panel_cntl->funcs->destroy(&link->panel_cntl);
+
+	if (link->link_enc) {
+		/* Update link encoder resource tracking variables. These are used for
+		 * the dynamic assignment of link encoders to streams. Virtual links
+		 * are not assigned encoder resources on creation.
+		 */
+		if (link->link_id.id != CONNECTOR_ID_VIRTUAL) {
+			link->dc->res_pool->link_encoders[link->eng_id - ENGINE_ID_DIGA] = NULL;
+			link->dc->res_pool->dig_link_enc_count--;
+		}
+		link->link_enc->funcs->destroy(&link->link_enc);
+	}
+
+	if (link->local_sink)
+		dc_sink_release(link->local_sink);
+
+	for (i = 0; i < link->sink_count; ++i)
+		dc_sink_release(link->remote_sinks[i]);
+}
+
+static enum channel_id get_ddc_line(struct dc_link *link)
+{
+	struct ddc *ddc;
+	enum channel_id channel;
+
+	channel = CHANNEL_ID_UNKNOWN;
+
+	ddc = get_ddc_pin(link->ddc);
+
+	if (ddc) {
+		switch (dal_ddc_get_line(ddc)) {
+		case GPIO_DDC_LINE_DDC1:
+			channel = CHANNEL_ID_DDC1;
+			break;
+		case GPIO_DDC_LINE_DDC2:
+			channel = CHANNEL_ID_DDC2;
+			break;
+		case GPIO_DDC_LINE_DDC3:
+			channel = CHANNEL_ID_DDC3;
+			break;
+		case GPIO_DDC_LINE_DDC4:
+			channel = CHANNEL_ID_DDC4;
+			break;
+		case GPIO_DDC_LINE_DDC5:
+			channel = CHANNEL_ID_DDC5;
+			break;
+		case GPIO_DDC_LINE_DDC6:
+			channel = CHANNEL_ID_DDC6;
+			break;
+		case GPIO_DDC_LINE_DDC_VGA:
+			channel = CHANNEL_ID_DDC_VGA;
+			break;
+		case GPIO_DDC_LINE_I2C_PAD:
+			channel = CHANNEL_ID_I2C_PAD;
+			break;
+		default:
+			BREAK_TO_DEBUGGER();
+			break;
+		}
+	}
+
+	return channel;
+}
+
+static bool construct_phy(struct dc_link *link,
+			      const struct link_init_data *init_params)
+{
+	uint8_t i;
+	struct ddc_service_init_data ddc_service_init_data = { 0 };
+	struct dc_context *dc_ctx = init_params->ctx;
+	struct encoder_init_data enc_init_data = { 0 };
+	struct panel_cntl_init_data panel_cntl_init_data = { 0 };
+	struct integrated_info info = { 0 };
+	struct dc_bios *bios = init_params->dc->ctx->dc_bios;
+	const struct dc_vbios_funcs *bp_funcs = bios->funcs;
+	struct bp_disp_connector_caps_info disp_connect_caps_info = { 0 };
+
+	DC_LOGGER_INIT(dc_ctx->logger);
+
+	link->irq_source_hpd = DC_IRQ_SOURCE_INVALID;
+	link->irq_source_hpd_rx = DC_IRQ_SOURCE_INVALID;
+	link->link_status.dpcd_caps = &link->dpcd_caps;
+
+	link->dc = init_params->dc;
+	link->ctx = dc_ctx;
+	link->link_index = init_params->link_index;
+
+	memset(&link->preferred_training_settings, 0,
+	       sizeof(struct dc_link_training_overrides));
+	memset(&link->preferred_link_setting, 0,
+	       sizeof(struct dc_link_settings));
+
+	link->link_id =
+		bios->funcs->get_connector_id(bios, init_params->connector_index);
+
+	link->ep_type = DISPLAY_ENDPOINT_PHY;
+
+	DC_LOG_DC("BIOS object table - link_id: %d", link->link_id.id);
+
+	if (bios->funcs->get_disp_connector_caps_info) {
+		bios->funcs->get_disp_connector_caps_info(bios, link->link_id, &disp_connect_caps_info);
+		link->is_internal_display = disp_connect_caps_info.INTERNAL_DISPLAY;
+		DC_LOG_DC("BIOS object table - is_internal_display: %d", link->is_internal_display);
+	}
+
+	if (link->link_id.type != OBJECT_TYPE_CONNECTOR) {
+		dm_output_to_console("%s: Invalid Connector ObjectID from Adapter Service for connector index:%d! type %d expected %d\n",
+				     __func__, init_params->connector_index,
+				     link->link_id.type, OBJECT_TYPE_CONNECTOR);
+		goto create_fail;
+	}
+
+	if (link->dc->res_pool->funcs->link_init)
+		link->dc->res_pool->funcs->link_init(link);
+
+	link->hpd_gpio = link_get_hpd_gpio(link->ctx->dc_bios, link->link_id,
+				      link->ctx->gpio_service);
+
+	if (link->hpd_gpio) {
+		dal_gpio_open(link->hpd_gpio, GPIO_MODE_INTERRUPT);
+		dal_gpio_unlock_pin(link->hpd_gpio);
+		link->irq_source_hpd = dal_irq_get_source(link->hpd_gpio);
+
+		DC_LOG_DC("BIOS object table - hpd_gpio id: %d", link->hpd_gpio->id);
+		DC_LOG_DC("BIOS object table - hpd_gpio en: %d", link->hpd_gpio->en);
+	}
+
+	switch (link->link_id.id) {
+	case CONNECTOR_ID_HDMI_TYPE_A:
+		link->connector_signal = SIGNAL_TYPE_HDMI_TYPE_A;
+
+		break;
+	case CONNECTOR_ID_SINGLE_LINK_DVID:
+	case CONNECTOR_ID_SINGLE_LINK_DVII:
+		link->connector_signal = SIGNAL_TYPE_DVI_SINGLE_LINK;
+		break;
+	case CONNECTOR_ID_DUAL_LINK_DVID:
+	case CONNECTOR_ID_DUAL_LINK_DVII:
+		link->connector_signal = SIGNAL_TYPE_DVI_DUAL_LINK;
+		break;
+	case CONNECTOR_ID_DISPLAY_PORT:
+	case CONNECTOR_ID_USBC:
+		link->connector_signal = SIGNAL_TYPE_DISPLAY_PORT;
+
+		if (link->hpd_gpio)
+			link->irq_source_hpd_rx =
+					dal_irq_get_rx_source(link->hpd_gpio);
+
+		break;
+	case CONNECTOR_ID_EDP:
+		link->connector_signal = SIGNAL_TYPE_EDP;
+
+		if (link->hpd_gpio) {
+			if (!link->dc->config.allow_edp_hotplug_detection)
+				link->irq_source_hpd = DC_IRQ_SOURCE_INVALID;
+
+			switch (link->dc->config.allow_edp_hotplug_detection) {
+			case HPD_EN_FOR_ALL_EDP:
+				link->irq_source_hpd_rx =
+						dal_irq_get_rx_source(link->hpd_gpio);
+				break;
+			case HPD_EN_FOR_PRIMARY_EDP_ONLY:
+				if (link->link_index == 0)
+					link->irq_source_hpd_rx =
+						dal_irq_get_rx_source(link->hpd_gpio);
+				else
+					link->irq_source_hpd = DC_IRQ_SOURCE_INVALID;
+				break;
+			case HPD_EN_FOR_SECONDARY_EDP_ONLY:
+				if (link->link_index == 1)
+					link->irq_source_hpd_rx =
+						dal_irq_get_rx_source(link->hpd_gpio);
+				else
+					link->irq_source_hpd = DC_IRQ_SOURCE_INVALID;
+				break;
+			default:
+				link->irq_source_hpd = DC_IRQ_SOURCE_INVALID;
+				break;
+			}
+		}
+
+		break;
+	case CONNECTOR_ID_LVDS:
+		link->connector_signal = SIGNAL_TYPE_LVDS;
+		break;
+	default:
+		DC_LOG_WARNING("Unsupported Connector type:%d!\n",
+			       link->link_id.id);
+		goto create_fail;
+	}
+
+	LINK_INFO("Connector[%d] description: signal: %s\n",
+		  init_params->connector_index,
+		  signal_type_to_string(link->connector_signal));
+
+	ddc_service_init_data.ctx = link->ctx;
+	ddc_service_init_data.id = link->link_id;
+	ddc_service_init_data.link = link;
+	link->ddc = link_create_ddc_service(&ddc_service_init_data);
+
+	if (!link->ddc) {
+		DC_ERROR("Failed to create ddc_service!\n");
+		goto ddc_create_fail;
+	}
+
+	if (!link->ddc->ddc_pin) {
+		DC_ERROR("Failed to get I2C info for connector!\n");
+		goto ddc_create_fail;
+	}
+
+	link->ddc_hw_inst =
+		dal_ddc_get_line(get_ddc_pin(link->ddc));
+
+	enc_init_data.ctx = dc_ctx;
+	bp_funcs->get_src_obj(dc_ctx->dc_bios, link->link_id, 0,
+			      &enc_init_data.encoder);
+	enc_init_data.connector = link->link_id;
+	enc_init_data.channel = get_ddc_line(link);
+	enc_init_data.hpd_source = get_hpd_line(link);
+
+	link->hpd_src = enc_init_data.hpd_source;
+
+	enc_init_data.transmitter =
+		translate_encoder_to_transmitter(enc_init_data.encoder);
+	link->link_enc =
+		link->dc->res_pool->funcs->link_enc_create(dc_ctx, &enc_init_data);
+
+	DC_LOG_DC("BIOS object table - DP_IS_USB_C: %d", link->link_enc->features.flags.bits.DP_IS_USB_C);
+	DC_LOG_DC("BIOS object table - IS_DP2_CAPABLE: %d", link->link_enc->features.flags.bits.IS_DP2_CAPABLE);
+
+	if (!link->link_enc) {
+		DC_ERROR("Failed to create link encoder!\n");
+		goto link_enc_create_fail;
+	}
+
+	/* Update link encoder tracking variables. These are used for the dynamic
+	 * assignment of link encoders to streams.
+	 */
+	link->eng_id = link->link_enc->preferred_engine;
+	link->dc->res_pool->link_encoders[link->eng_id - ENGINE_ID_DIGA] = link->link_enc;
+	link->dc->res_pool->dig_link_enc_count++;
+
+	link->link_enc_hw_inst = link->link_enc->transmitter;
+
+	if (link->dc->res_pool->funcs->panel_cntl_create &&
+		(link->link_id.id == CONNECTOR_ID_EDP ||
+			link->link_id.id == CONNECTOR_ID_LVDS)) {
+		panel_cntl_init_data.ctx = dc_ctx;
+		panel_cntl_init_data.inst = panel_cntl_init_data.ctx->dc_edp_id_count;
+		panel_cntl_init_data.pwrseq_inst = translate_dig_inst_to_pwrseq_inst(link);
+		link->panel_cntl =
+			link->dc->res_pool->funcs->panel_cntl_create(
+								&panel_cntl_init_data);
+		panel_cntl_init_data.ctx->dc_edp_id_count++;
+
+		if (link->panel_cntl == NULL) {
+			DC_ERROR("Failed to create link panel_cntl!\n");
+			goto panel_cntl_create_fail;
+		}
+	}
+	for (i = 0; i < 4; i++) {
+		if (bp_funcs->get_device_tag(dc_ctx->dc_bios,
+					     link->link_id, i,
+					     &link->device_tag) != BP_RESULT_OK) {
+			DC_ERROR("Failed to find device tag!\n");
+			goto device_tag_fail;
+		}
+
+		/* Look for device tag that matches connector signal,
+		 * CRT for rgb, LCD for other supported signal tyes
+		 */
+		if (!bp_funcs->is_device_id_supported(dc_ctx->dc_bios,
+						      link->device_tag.dev_id))
+			continue;
+		if (link->device_tag.dev_id.device_type == DEVICE_TYPE_CRT &&
+		    link->connector_signal != SIGNAL_TYPE_RGB)
+			continue;
+		if (link->device_tag.dev_id.device_type == DEVICE_TYPE_LCD &&
+		    link->connector_signal == SIGNAL_TYPE_RGB)
+			continue;
+
+		DC_LOG_DC("BIOS object table - device_tag.acpi_device: %d", link->device_tag.acpi_device);
+		DC_LOG_DC("BIOS object table - device_tag.dev_id.device_type: %d", link->device_tag.dev_id.device_type);
+		DC_LOG_DC("BIOS object table - device_tag.dev_id.enum_id: %d", link->device_tag.dev_id.enum_id);
+		break;
+	}
+
+	if (bios->integrated_info)
+		info = *bios->integrated_info;
+
+	/* Look for channel mapping corresponding to connector and device tag */
+	for (i = 0; i < MAX_NUMBER_OF_EXT_DISPLAY_PATH; i++) {
+		struct external_display_path *path =
+			&info.ext_disp_conn_info.path[i];
+
+		if (path->device_connector_id.enum_id == link->link_id.enum_id &&
+		    path->device_connector_id.id == link->link_id.id &&
+		    path->device_connector_id.type == link->link_id.type) {
+			if (link->device_tag.acpi_device != 0 &&
+			    path->device_acpi_enum == link->device_tag.acpi_device) {
+				link->ddi_channel_mapping = path->channel_mapping;
+				link->chip_caps = path->caps;
+				DC_LOG_DC("BIOS object table - ddi_channel_mapping: 0x%04X", link->ddi_channel_mapping.raw);
+				DC_LOG_DC("BIOS object table - chip_caps: %d", link->chip_caps);
+			} else if (path->device_tag ==
+				   link->device_tag.dev_id.raw_device_tag) {
+				link->ddi_channel_mapping = path->channel_mapping;
+				link->chip_caps = path->caps;
+				DC_LOG_DC("BIOS object table - ddi_channel_mapping: 0x%04X", link->ddi_channel_mapping.raw);
+				DC_LOG_DC("BIOS object table - chip_caps: %d", link->chip_caps);
+			}
+
+			if (link->chip_caps & EXT_DISPLAY_PATH_CAPS__DP_FIXED_VS_EN) {
+				link->bios_forced_drive_settings.VOLTAGE_SWING =
+						(info.ext_disp_conn_info.fixdpvoltageswing & 0x3);
+				link->bios_forced_drive_settings.PRE_EMPHASIS =
+						((info.ext_disp_conn_info.fixdpvoltageswing >> 2) & 0x3);
+			}
+
+			break;
+		}
+	}
+
+	if (bios->funcs->get_atom_dc_golden_table)
+		bios->funcs->get_atom_dc_golden_table(bios);
+
+	/*
+	 * TODO check if GPIO programmed correctly
+	 *
+	 * If GPIO isn't programmed correctly HPD might not rise or drain
+	 * fast enough, leading to bounces.
+	 */
+	program_hpd_filter(link);
+
+	link->psr_settings.psr_vtotal_control_support = false;
+	link->psr_settings.psr_version = DC_PSR_VERSION_UNSUPPORTED;
+
+	DC_LOG_DC("BIOS object table - %s finished successfully.\n", __func__);
+	return true;
+device_tag_fail:
+	link->link_enc->funcs->destroy(&link->link_enc);
+link_enc_create_fail:
+	if (link->panel_cntl != NULL)
+		link->panel_cntl->funcs->destroy(&link->panel_cntl);
+panel_cntl_create_fail:
+	link_destroy_ddc_service(&link->ddc);
+ddc_create_fail:
+create_fail:
+
+	if (link->hpd_gpio) {
+		dal_gpio_destroy_irq(&link->hpd_gpio);
+		link->hpd_gpio = NULL;
+	}
+
+	DC_LOG_DC("BIOS object table - %s failed.\n", __func__);
+	return false;
+}
+
+static bool construct_dpia(struct dc_link *link,
+			      const struct link_init_data *init_params)
+{
+	struct ddc_service_init_data ddc_service_init_data = { 0 };
+	struct dc_context *dc_ctx = init_params->ctx;
+
+	DC_LOGGER_INIT(dc_ctx->logger);
+
+	/* Initialized irq source for hpd and hpd rx */
+	link->irq_source_hpd = DC_IRQ_SOURCE_INVALID;
+	link->irq_source_hpd_rx = DC_IRQ_SOURCE_INVALID;
+	link->link_status.dpcd_caps = &link->dpcd_caps;
+
+	link->dc = init_params->dc;
+	link->ctx = dc_ctx;
+	link->link_index = init_params->link_index;
+
+	memset(&link->preferred_training_settings, 0,
+	       sizeof(struct dc_link_training_overrides));
+	memset(&link->preferred_link_setting, 0,
+	       sizeof(struct dc_link_settings));
+
+	/* Dummy Init for linkid */
+	link->link_id.type = OBJECT_TYPE_CONNECTOR;
+	link->link_id.id = CONNECTOR_ID_DISPLAY_PORT;
+	link->link_id.enum_id = ENUM_ID_1 + init_params->connector_index;
+	link->is_internal_display = false;
+	link->connector_signal = SIGNAL_TYPE_DISPLAY_PORT;
+	LINK_INFO("Connector[%d] description:signal %d\n",
+		  init_params->connector_index,
+		  link->connector_signal);
+
+	link->ep_type = DISPLAY_ENDPOINT_USB4_DPIA;
+	link->is_dig_mapping_flexible = true;
+
+	/* TODO: Initialize link : funcs->link_init */
+
+	ddc_service_init_data.ctx = link->ctx;
+	ddc_service_init_data.id = link->link_id;
+	ddc_service_init_data.link = link;
+	/* Set indicator for dpia link so that ddc wont be created */
+	ddc_service_init_data.is_dpia_link = true;
+
+	link->ddc = link_create_ddc_service(&ddc_service_init_data);
+	if (!link->ddc) {
+		DC_ERROR("Failed to create ddc_service!\n");
+		goto ddc_create_fail;
+	}
+
+	/* Set dpia port index : 0 to number of dpia ports */
+	link->ddc_hw_inst = init_params->connector_index;
+
+	// Assign Dpia preferred eng_id
+	if (link->dc->res_pool->funcs->get_preferred_eng_id_dpia)
+		link->dpia_preferred_eng_id = link->dc->res_pool->funcs->get_preferred_eng_id_dpia(link->ddc_hw_inst);
+
+	/* TODO: Create link encoder */
+
+	link->psr_settings.psr_version = DC_PSR_VERSION_UNSUPPORTED;
+
+	/* Some docks seem to NAK I2C writes to segment pointer with mot=0. */
+	link->wa_flags.dp_mot_reset_segment = true;
+
+	return true;
+
+ddc_create_fail:
+	return false;
+}
+
+static bool link_construct(struct dc_link *link,
+			      const struct link_init_data *init_params)
+{
+	/* Handle dpia case */
+	if (init_params->is_dpia_link == true)
+		return construct_dpia(link, init_params);
+	else
+		return construct_phy(link, init_params);
+}
+
+struct dc_link *link_create(const struct link_init_data *init_params)
+{
+	struct dc_link *link =
+			kzalloc(sizeof(*link), GFP_KERNEL);
+
+	if (NULL == link)
+		goto alloc_fail;
+
+	if (false == link_construct(link, init_params))
+		goto construct_fail;
+
+	return link;
+
+construct_fail:
+	kfree(link);
+
+alloc_fail:
+	return NULL;
+}
+
+void link_destroy(struct dc_link **link)
+{
+	link_destruct(*link);
+	kfree(*link);
+	*link = NULL;
+}
diff --git a/drivers/gpu/drm/amd/display/dc/link/link_factory.h b/drivers/gpu/drm/amd/display/dc/link/link_factory.h
new file mode 100644
index 000000000..e96220d48
--- /dev/null
+++ b/drivers/gpu/drm/amd/display/dc/link/link_factory.h
@@ -0,0 +1,31 @@
+/*
+ * Copyright 2023 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 __LINK_FACTORY_H__
+#define __LINK_FACTORY_H__
+#include "link.h"
+struct dc_link *link_create(const struct link_init_data *init_params);
+void link_destroy(struct dc_link **link);
+
+#endif /* __LINK_FACTORY_H__ */
diff --git a/drivers/gpu/drm/amd/display/dc/link/link_hwss_hpo_frl.c b/drivers/gpu/drm/amd/display/dc/link/link_hwss_hpo_frl.c
new file mode 100644
index 000000000..4b5eccd99
--- /dev/null
+++ b/drivers/gpu/drm/amd/display/dc/link/link_hwss_hpo_frl.c
@@ -0,0 +1,62 @@
+/*
+ * Copyright 2022 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 "link_hwss_hpo_frl.h"
+#include "core_types.h"
+#include "virtual/virtual_link_hwss.h"
+
+static void setup_hpo_frl_stream_attribute(struct pipe_ctx *pipe_ctx)
+{
+	struct hpo_frl_stream_encoder *stream_enc = pipe_ctx->stream_res.hpo_frl_stream_enc;
+	struct dc_stream_state *stream = pipe_ctx->stream;
+	struct pipe_ctx *odm_pipe;
+	int odm_combine_num_segments = 1;
+
+	/* get number of ODM combine input segments */
+	for (odm_pipe = pipe_ctx->next_odm_pipe; odm_pipe; odm_pipe = odm_pipe->next_odm_pipe)
+		odm_combine_num_segments++;
+
+	stream_enc->funcs->hdmi_frl_set_stream_attribute(
+			stream_enc,
+			&stream->timing,
+			&stream->link->frl_link_settings.borrow_params,
+			odm_combine_num_segments);
+}
+
+static const struct link_hwss hpo_frl_link_hwss = {
+	.setup_stream_encoder = virtual_setup_stream_encoder,
+	.reset_stream_encoder = virtual_reset_stream_encoder,
+	.setup_stream_attribute = setup_hpo_frl_stream_attribute,
+};
+
+bool can_use_hpo_frl_link_hwss(const struct dc_link *link,
+		const struct link_resource *link_res)
+{
+	return link_res->hpo_frl_link_enc != NULL;
+}
+
+const struct link_hwss *get_hpo_frl_link_hwss(void)
+{
+	return &hpo_frl_link_hwss;
+}
diff --git a/drivers/gpu/drm/amd/display/dc/link/link_resource.c b/drivers/gpu/drm/amd/display/dc/link/link_resource.c
new file mode 100644
index 000000000..bd42bb273
--- /dev/null
+++ b/drivers/gpu/drm/amd/display/dc/link/link_resource.c
@@ -0,0 +1,114 @@
+/*
+ * Copyright 2023 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
+ *
+ */
+/* FILE POLICY AND INTENDED USAGE:
+ * This file implements accessors to link resource.
+ */
+
+#include "link_resource.h"
+#include "protocols/link_dp_capability.h"
+
+void link_get_cur_link_res(const struct dc_link *link,
+		struct link_resource *link_res)
+{
+	int i;
+	struct pipe_ctx *pipe = NULL;
+
+	memset(link_res, 0, sizeof(*link_res));
+
+	for (i = 0; i < MAX_PIPES; i++) {
+		pipe = &link->dc->current_state->res_ctx.pipe_ctx[i];
+		if (pipe->stream && pipe->stream->link && pipe->top_pipe == NULL) {
+			if (pipe->stream->link == link) {
+				*link_res = pipe->link_res;
+				break;
+			}
+		}
+	}
+
+}
+
+void link_get_cur_res_map(const struct dc *dc, uint32_t *map)
+{
+	struct dc_link *link;
+	uint32_t i;
+	uint32_t hpo_dp_recycle_map = 0;
+
+	*map = 0;
+
+	if (dc->caps.dp_hpo) {
+		for (i = 0; i < dc->caps.max_links; i++) {
+			link = dc->links[i];
+			if (link->link_status.link_active &&
+					link_dp_get_encoding_format(&link->reported_link_cap) == DP_128b_132b_ENCODING &&
+					link_dp_get_encoding_format(&link->cur_link_settings) != DP_128b_132b_ENCODING)
+				/* hpo dp link encoder is considered as recycled, when RX reports 128b/132b encoding capability
+				 * but current link doesn't use it.
+				 */
+				hpo_dp_recycle_map |= (1 << i);
+		}
+		*map |= (hpo_dp_recycle_map << LINK_RES_HPO_DP_REC_MAP__SHIFT);
+	}
+}
+
+void link_restore_res_map(const struct dc *dc, uint32_t *map)
+{
+	struct dc_link *link;
+	uint32_t i;
+	unsigned int available_hpo_dp_count;
+	uint32_t hpo_dp_recycle_map = (*map & LINK_RES_HPO_DP_REC_MAP__MASK)
+			>> LINK_RES_HPO_DP_REC_MAP__SHIFT;
+
+	if (dc->caps.dp_hpo) {
+		available_hpo_dp_count = dc->res_pool->hpo_dp_link_enc_count;
+		/* remove excess 128b/132b encoding support for not recycled links */
+		for (i = 0; i < dc->caps.max_links; i++) {
+			if ((hpo_dp_recycle_map & (1 << i)) == 0) {
+				link = dc->links[i];
+				if (link->type != dc_connection_none &&
+						link_dp_get_encoding_format(&link->verified_link_cap) == DP_128b_132b_ENCODING) {
+					if (available_hpo_dp_count > 0)
+						available_hpo_dp_count--;
+					else
+						/* remove 128b/132b encoding capability by limiting verified link rate to HBR3 */
+						link->verified_link_cap.link_rate = LINK_RATE_HIGH3;
+				}
+			}
+		}
+		/* remove excess 128b/132b encoding support for recycled links */
+		for (i = 0; i < dc->caps.max_links; i++) {
+			if ((hpo_dp_recycle_map & (1 << i)) != 0) {
+				link = dc->links[i];
+				if (link->type != dc_connection_none &&
+						link_dp_get_encoding_format(&link->verified_link_cap) == DP_128b_132b_ENCODING) {
+					if (available_hpo_dp_count > 0)
+						available_hpo_dp_count--;
+					else
+						/* remove 128b/132b encoding capability by limiting verified link rate to HBR3 */
+						link->verified_link_cap.link_rate = LINK_RATE_HIGH3;
+				}
+			}
+		}
+	}
+}
diff --git a/drivers/gpu/drm/amd/display/dc/link/link_resource.h b/drivers/gpu/drm/amd/display/dc/link/link_resource.h
new file mode 100644
index 000000000..1907bda3c
--- /dev/null
+++ b/drivers/gpu/drm/amd/display/dc/link/link_resource.h
@@ -0,0 +1,32 @@
+/*
+ * Copyright 2023 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 __LINK_RESOURCE_H__
+#define __LINK_RESOURCE_H__
+#include "link.h"
+void link_get_cur_res_map(const struct dc *dc, uint32_t *map);
+void link_restore_res_map(const struct dc *dc, uint32_t *map);
+void link_get_cur_link_res(const struct dc_link *link,
+		struct link_resource *link_res);
+#endif /* __LINK_RESOURCE_H__ */
diff --git a/drivers/gpu/drm/amd/display/dc/link/link_validation.c b/drivers/gpu/drm/amd/display/dc/link/link_validation.c
new file mode 100644
index 000000000..b45fda96e
--- /dev/null
+++ b/drivers/gpu/drm/amd/display/dc/link/link_validation.c
@@ -0,0 +1,368 @@
+/*
+ * Copyright 2023 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
+ *
+ */
+
+/* FILE POLICY AND INTENDED USAGE:
+ * This file owns timing validation against various link limitations. (ex.
+ * link bandwidth, receiver capability or our hardware capability) It also
+ * provides helper functions exposing bandwidth formulas used in validation.
+ */
+#include "link_validation.h"
+#include "protocols/link_dp_capability.h"
+#include "protocols/link_dp_dpia_bw.h"
+#include "resource.h"
+
+#define DC_LOGGER_INIT(logger)
+
+static uint32_t get_tmds_output_pixel_clock_100hz(const struct dc_crtc_timing *timing)
+{
+
+	uint32_t pxl_clk = timing->pix_clk_100hz;
+
+	if (timing->pixel_encoding == PIXEL_ENCODING_YCBCR420)
+		pxl_clk /= 2;
+	else if (timing->pixel_encoding == PIXEL_ENCODING_YCBCR422)
+		pxl_clk = pxl_clk * 2 / 3;
+
+	if (timing->display_color_depth == COLOR_DEPTH_101010)
+		pxl_clk = pxl_clk * 10 / 8;
+	else if (timing->display_color_depth == COLOR_DEPTH_121212)
+		pxl_clk = pxl_clk * 12 / 8;
+
+	return pxl_clk;
+}
+
+static bool dp_active_dongle_validate_timing(
+		const struct dc_crtc_timing *timing,
+		const struct dpcd_caps *dpcd_caps)
+{
+	const struct dc_dongle_caps *dongle_caps = &dpcd_caps->dongle_caps;
+
+	switch (dpcd_caps->dongle_type) {
+	case DISPLAY_DONGLE_DP_VGA_CONVERTER:
+	case DISPLAY_DONGLE_DP_DVI_CONVERTER:
+	case DISPLAY_DONGLE_DP_DVI_DONGLE:
+		if (timing->pixel_encoding == PIXEL_ENCODING_RGB)
+			return true;
+		else
+			return false;
+	default:
+		break;
+	}
+
+	if (dpcd_caps->dongle_type == DISPLAY_DONGLE_DP_HDMI_CONVERTER &&
+			dongle_caps->extendedCapValid == true) {
+		/* Check Pixel Encoding */
+		switch (timing->pixel_encoding) {
+		case PIXEL_ENCODING_RGB:
+		case PIXEL_ENCODING_YCBCR444:
+			break;
+		case PIXEL_ENCODING_YCBCR422:
+			if (!dongle_caps->is_dp_hdmi_ycbcr422_pass_through)
+				return false;
+			break;
+		case PIXEL_ENCODING_YCBCR420:
+			if (!dongle_caps->is_dp_hdmi_ycbcr420_pass_through)
+				return false;
+			break;
+		default:
+			/* Invalid Pixel Encoding*/
+			return false;
+		}
+
+		switch (timing->display_color_depth) {
+		case COLOR_DEPTH_666:
+		case COLOR_DEPTH_888:
+			/*888 and 666 should always be supported*/
+			break;
+		case COLOR_DEPTH_101010:
+			if (dongle_caps->dp_hdmi_max_bpc < 10)
+				return false;
+			break;
+		case COLOR_DEPTH_121212:
+			if (dongle_caps->dp_hdmi_max_bpc < 12)
+				return false;
+			break;
+		case COLOR_DEPTH_141414:
+		case COLOR_DEPTH_161616:
+		default:
+			/* These color depths are currently not supported */
+			return false;
+		}
+
+		/* Check 3D format */
+		switch (timing->timing_3d_format) {
+		case TIMING_3D_FORMAT_NONE:
+		case TIMING_3D_FORMAT_FRAME_ALTERNATE:
+			/*Only frame alternate 3D is supported on active dongle*/
+			break;
+		default:
+			/*other 3D formats are not supported due to bad infoframe translation */
+			return false;
+		}
+
+		if (dongle_caps->dp_hdmi_frl_max_link_bw_in_kbps > 0) { // DP to HDMI FRL converter
+			struct dc_crtc_timing outputTiming = *timing;
+
+#if defined(CONFIG_DRM_AMD_DC_FP)
+			if (timing->flags.DSC && !timing->dsc_cfg.is_frl)
+				/* DP input has DSC, HDMI FRL output doesn't have DSC, remove DSC from output timing */
+				outputTiming.flags.DSC = 0;
+#endif
+			if (dc_bandwidth_in_kbps_from_timing(&outputTiming, DC_LINK_ENCODING_HDMI_FRL) >
+					dongle_caps->dp_hdmi_frl_max_link_bw_in_kbps)
+				return false;
+		} else { // DP to HDMI TMDS converter
+			if (get_tmds_output_pixel_clock_100hz(timing) > (dongle_caps->dp_hdmi_max_pixel_clk_in_khz * 10))
+				return false;
+		}
+	}
+
+	if (dpcd_caps->channel_coding_cap.bits.DP_128b_132b_SUPPORTED == 0 &&
+			dpcd_caps->dsc_caps.dsc_basic_caps.fields.dsc_support.DSC_PASSTHROUGH_SUPPORT == 0 &&
+			dongle_caps->dfp_cap_ext.supported) {
+
+		if (dongle_caps->dfp_cap_ext.max_pixel_rate_in_mps < (timing->pix_clk_100hz / 10000))
+			return false;
+
+		if (dongle_caps->dfp_cap_ext.max_video_h_active_width < timing->h_addressable)
+			return false;
+
+		if (dongle_caps->dfp_cap_ext.max_video_v_active_height < timing->v_addressable)
+			return false;
+
+		if (timing->pixel_encoding == PIXEL_ENCODING_RGB) {
+			if (!dongle_caps->dfp_cap_ext.encoding_format_caps.support_rgb)
+				return false;
+			if (timing->display_color_depth == COLOR_DEPTH_666 &&
+					!dongle_caps->dfp_cap_ext.rgb_color_depth_caps.support_6bpc)
+				return false;
+			else if (timing->display_color_depth == COLOR_DEPTH_888 &&
+					!dongle_caps->dfp_cap_ext.rgb_color_depth_caps.support_8bpc)
+				return false;
+			else if (timing->display_color_depth == COLOR_DEPTH_101010 &&
+					!dongle_caps->dfp_cap_ext.rgb_color_depth_caps.support_10bpc)
+				return false;
+			else if (timing->display_color_depth == COLOR_DEPTH_121212 &&
+					!dongle_caps->dfp_cap_ext.rgb_color_depth_caps.support_12bpc)
+				return false;
+			else if (timing->display_color_depth == COLOR_DEPTH_161616 &&
+					!dongle_caps->dfp_cap_ext.rgb_color_depth_caps.support_16bpc)
+				return false;
+		} else if (timing->pixel_encoding == PIXEL_ENCODING_YCBCR444) {
+			if (!dongle_caps->dfp_cap_ext.encoding_format_caps.support_rgb)
+				return false;
+			if (timing->display_color_depth == COLOR_DEPTH_888 &&
+					!dongle_caps->dfp_cap_ext.ycbcr444_color_depth_caps.support_8bpc)
+				return false;
+			else if (timing->display_color_depth == COLOR_DEPTH_101010 &&
+					!dongle_caps->dfp_cap_ext.ycbcr444_color_depth_caps.support_10bpc)
+				return false;
+			else if (timing->display_color_depth == COLOR_DEPTH_121212 &&
+					!dongle_caps->dfp_cap_ext.ycbcr444_color_depth_caps.support_12bpc)
+				return false;
+			else if (timing->display_color_depth == COLOR_DEPTH_161616 &&
+					!dongle_caps->dfp_cap_ext.ycbcr444_color_depth_caps.support_16bpc)
+				return false;
+		} else if (timing->pixel_encoding == PIXEL_ENCODING_YCBCR422) {
+			if (!dongle_caps->dfp_cap_ext.encoding_format_caps.support_rgb)
+				return false;
+			if (timing->display_color_depth == COLOR_DEPTH_888 &&
+					!dongle_caps->dfp_cap_ext.ycbcr422_color_depth_caps.support_8bpc)
+				return false;
+			else if (timing->display_color_depth == COLOR_DEPTH_101010 &&
+					!dongle_caps->dfp_cap_ext.ycbcr422_color_depth_caps.support_10bpc)
+				return false;
+			else if (timing->display_color_depth == COLOR_DEPTH_121212 &&
+					!dongle_caps->dfp_cap_ext.ycbcr422_color_depth_caps.support_12bpc)
+				return false;
+			else if (timing->display_color_depth == COLOR_DEPTH_161616 &&
+					!dongle_caps->dfp_cap_ext.ycbcr422_color_depth_caps.support_16bpc)
+				return false;
+		} else if (timing->pixel_encoding == PIXEL_ENCODING_YCBCR420) {
+			if (!dongle_caps->dfp_cap_ext.encoding_format_caps.support_rgb)
+				return false;
+			if (timing->display_color_depth == COLOR_DEPTH_888 &&
+					!dongle_caps->dfp_cap_ext.ycbcr420_color_depth_caps.support_8bpc)
+				return false;
+			else if (timing->display_color_depth == COLOR_DEPTH_101010 &&
+					!dongle_caps->dfp_cap_ext.ycbcr420_color_depth_caps.support_10bpc)
+				return false;
+			else if (timing->display_color_depth == COLOR_DEPTH_121212 &&
+					!dongle_caps->dfp_cap_ext.ycbcr420_color_depth_caps.support_12bpc)
+				return false;
+			else if (timing->display_color_depth == COLOR_DEPTH_161616 &&
+					!dongle_caps->dfp_cap_ext.ycbcr420_color_depth_caps.support_16bpc)
+				return false;
+		}
+	}
+
+	return true;
+}
+
+uint32_t dp_link_bandwidth_kbps(
+	const struct dc_link *link,
+	const struct dc_link_settings *link_settings)
+{
+	uint32_t total_data_bw_efficiency_x10000 = 0;
+	uint32_t link_rate_per_lane_kbps = 0;
+
+	switch (link_dp_get_encoding_format(link_settings)) {
+	case DP_8b_10b_ENCODING:
+		/* For 8b/10b encoding:
+		 * link rate is defined in the unit of LINK_RATE_REF_FREQ_IN_KHZ per DP byte per lane.
+		 * data bandwidth efficiency is 80% with additional 3% overhead if FEC is supported.
+		 */
+		link_rate_per_lane_kbps = link_settings->link_rate * LINK_RATE_REF_FREQ_IN_KHZ * BITS_PER_DP_BYTE;
+		total_data_bw_efficiency_x10000 = DATA_EFFICIENCY_8b_10b_x10000;
+		if (dp_should_enable_fec(link)) {
+			total_data_bw_efficiency_x10000 /= 100;
+			total_data_bw_efficiency_x10000 *= DATA_EFFICIENCY_8b_10b_FEC_EFFICIENCY_x100;
+		}
+		break;
+	case DP_128b_132b_ENCODING:
+		/* For 128b/132b encoding:
+		 * link rate is defined in the unit of 10mbps per lane.
+		 * total data bandwidth efficiency is always 96.71%.
+		 */
+		link_rate_per_lane_kbps = link_settings->link_rate * 10000;
+		total_data_bw_efficiency_x10000 = DATA_EFFICIENCY_128b_132b_x10000;
+		break;
+	default:
+		break;
+	}
+
+	/* overall effective link bandwidth = link rate per lane * lane count * total data bandwidth efficiency */
+	return link_rate_per_lane_kbps * link_settings->lane_count / 10000 * total_data_bw_efficiency_x10000;
+}
+
+static bool dp_validate_mode_timing(
+	struct dc_link *link,
+	const struct dc_crtc_timing *timing)
+{
+	uint32_t req_bw;
+	uint32_t max_bw;
+
+	const struct dc_link_settings *link_setting;
+
+	/* According to spec, VSC SDP should be used if pixel format is YCbCr420 */
+	if (timing->pixel_encoding == PIXEL_ENCODING_YCBCR420 &&
+			!link->dpcd_caps.dprx_feature.bits.VSC_SDP_COLORIMETRY_SUPPORTED &&
+			dal_graphics_object_id_get_connector_id(link->link_id) != CONNECTOR_ID_VIRTUAL)
+		return false;
+
+	/*always DP fail safe mode*/
+	if ((timing->pix_clk_100hz / 10) == (uint32_t) 25175 &&
+		timing->h_addressable == (uint32_t) 640 &&
+		timing->v_addressable == (uint32_t) 480)
+		return true;
+
+	link_setting = dp_get_verified_link_cap(link);
+
+	/* TODO: DYNAMIC_VALIDATION needs to be implemented */
+	/*if (flags.DYNAMIC_VALIDATION == 1 &&
+		link->verified_link_cap.lane_count != LANE_COUNT_UNKNOWN)
+		link_setting = &link->verified_link_cap;
+	*/
+
+	req_bw = dc_bandwidth_in_kbps_from_timing(timing, dc_link_get_highest_encoding_format(link));
+	max_bw = dp_link_bandwidth_kbps(link, link_setting);
+
+	if (req_bw <= max_bw) {
+		/* remember the biggest mode here, during
+		 * initial link training (to get
+		 * verified_link_cap), LS sends event about
+		 * cannot train at reported cap to upper
+		 * layer and upper layer will re-enumerate modes.
+		 * this is not necessary if the lower
+		 * verified_link_cap is enough to drive
+		 * all the modes */
+
+		/* TODO: DYNAMIC_VALIDATION needs to be implemented */
+		/* if (flags.DYNAMIC_VALIDATION == 1)
+			dpsst->max_req_bw_for_verified_linkcap = dal_max(
+				dpsst->max_req_bw_for_verified_linkcap, req_bw); */
+		return true;
+	} else
+		return false;
+}
+
+enum dc_status link_validate_mode_timing(
+		const struct dc_stream_state *stream,
+		struct dc_link *link,
+		const struct dc_crtc_timing *timing)
+{
+	uint32_t max_pix_clk = stream->link->dongle_max_pix_clk * 10;
+	struct dpcd_caps *dpcd_caps = &link->dpcd_caps;
+
+	/* A hack to avoid failing any modes for EDID override feature on
+	 * topology change such as lower quality cable for DP or different dongle
+	 */
+	if (link->remote_sinks[0] && link->remote_sinks[0]->sink_signal == SIGNAL_TYPE_VIRTUAL)
+		return DC_OK;
+
+	/* Passive Dongle */
+	if (max_pix_clk != 0 && get_tmds_output_pixel_clock_100hz(timing) > max_pix_clk)
+		return DC_EXCEED_DONGLE_CAP;
+
+	/* Active Dongle*/
+	if (!dp_active_dongle_validate_timing(timing, dpcd_caps))
+		return DC_EXCEED_DONGLE_CAP;
+
+	switch (stream->signal) {
+	case SIGNAL_TYPE_EDP:
+	case SIGNAL_TYPE_DISPLAY_PORT:
+		if (!dp_validate_mode_timing(
+				link,
+				timing))
+			return DC_NO_DP_LINK_BANDWIDTH;
+		break;
+
+	default:
+		break;
+	}
+
+	return DC_OK;
+}
+
+bool link_validate_dpia_bandwidth(const struct dc_stream_state *stream, const unsigned int num_streams)
+{
+	bool ret = true;
+	int bw_needed[MAX_DPIA_NUM];
+	struct dc_link *link[MAX_DPIA_NUM];
+
+	if (!num_streams || num_streams > MAX_DPIA_NUM)
+		return ret;
+
+	for (uint8_t i = 0; i < num_streams; ++i) {
+
+		link[i] = stream[i].link;
+		bw_needed[i] = dc_bandwidth_in_kbps_from_timing(&stream[i].timing,
+				dc_link_get_highest_encoding_format(link[i]));
+	}
+
+	ret = dpia_validate_usb4_bw(link, bw_needed, num_streams);
+
+	return ret;
+}
diff --git a/drivers/gpu/drm/amd/display/dc/link/link_validation.h b/drivers/gpu/drm/amd/display/dc/link/link_validation.h
new file mode 100644
index 000000000..4a954317d
--- /dev/null
+++ b/drivers/gpu/drm/amd/display/dc/link/link_validation.h
@@ -0,0 +1,39 @@
+/*
+ * Copyright 2023 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 __LINK_VALIDATION_H__
+#define __LINK_VALIDATION_H__
+#include "link.h"
+enum dc_status link_validate_mode_timing(
+		const struct dc_stream_state *stream,
+		struct dc_link *link,
+		const struct dc_crtc_timing *timing);
+bool link_validate_dpia_bandwidth(
+		const struct dc_stream_state *stream,
+		const unsigned int num_streams);
+uint32_t dp_link_bandwidth_kbps(
+	const struct dc_link *link,
+	const struct dc_link_settings *link_settings);
+
+#endif /* __LINK_VALIDATION_H__ */
diff --git a/drivers/gpu/drm/amd/display/dc/link/protocols/link_ddc.c b/drivers/gpu/drm/amd/display/dc/link/protocols/link_ddc.c
new file mode 100644
index 000000000..ecfd83299
--- /dev/null
+++ b/drivers/gpu/drm/amd/display/dc/link/protocols/link_ddc.c
@@ -0,0 +1,605 @@
+/*
+ * 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
+ *
+ */
+
+/* FILE POLICY AND INTENDED USAGE:
+ *
+ * This file implements generic display communication protocols such as i2c, aux
+ * and scdc. The file should not contain any specific applications of these
+ * protocols such as display capability query, detection, or handshaking such as
+ * link training.
+ */
+#include "link_ddc.h"
+#include "vector.h"
+#include "dce/dce_aux.h"
+#include "dal_asic_id.h"
+#include "link_dpcd.h"
+#include "dm_helpers.h"
+#include "atomfirmware.h"
+
+#define DC_LOGGER_INIT(logger)
+
+static const uint8_t DP_VGA_DONGLE_BRANCH_DEV_NAME[] = "DpVga";
+/* DP to Dual link DVI converter */
+static const uint8_t DP_DVI_CONVERTER_ID_4[] = "m2DVIa";
+static const uint8_t DP_DVI_CONVERTER_ID_5[] = "3393N2";
+
+struct i2c_payloads {
+	struct vector payloads;
+};
+
+struct aux_payloads {
+	struct vector payloads;
+};
+
+static bool i2c_payloads_create(
+		struct dc_context *ctx,
+		struct i2c_payloads *payloads,
+		uint32_t count)
+{
+	if (dal_vector_construct(
+		&payloads->payloads, ctx, count, sizeof(struct i2c_payload)))
+		return true;
+
+	return false;
+}
+
+static struct i2c_payload *i2c_payloads_get(struct i2c_payloads *p)
+{
+	return (struct i2c_payload *)p->payloads.container;
+}
+
+static uint32_t i2c_payloads_get_count(struct i2c_payloads *p)
+{
+	return p->payloads.count;
+}
+
+static void i2c_payloads_destroy(struct i2c_payloads *p)
+{
+	if (!p)
+		return;
+
+	dal_vector_destruct(&p->payloads);
+}
+
+#define DDC_MIN(a, b) (((a) < (b)) ? (a) : (b))
+
+static void i2c_payloads_add(
+	struct i2c_payloads *payloads,
+	uint32_t address,
+	uint32_t len,
+	uint8_t *data,
+	bool write)
+{
+	uint32_t payload_size = EDID_SEGMENT_SIZE;
+	uint32_t pos;
+
+	for (pos = 0; pos < len; pos += payload_size) {
+		struct i2c_payload payload = {
+			.write = write,
+			.address = address,
+			.length = DDC_MIN(payload_size, len - pos),
+			.data = data + pos };
+		dal_vector_append(&payloads->payloads, &payload);
+	}
+
+}
+
+static void ddc_service_construct(
+	struct ddc_service *ddc_service,
+	struct ddc_service_init_data *init_data)
+{
+	enum connector_id connector_id =
+		dal_graphics_object_id_get_connector_id(init_data->id);
+
+	struct gpio_service *gpio_service = init_data->ctx->gpio_service;
+	struct graphics_object_i2c_info i2c_info;
+	struct gpio_ddc_hw_info hw_info;
+	struct dc_bios *dcb = init_data->ctx->dc_bios;
+
+	ddc_service->link = init_data->link;
+	ddc_service->ctx = init_data->ctx;
+
+	if (init_data->is_dpia_link ||
+	    dcb->funcs->get_i2c_info(dcb, init_data->id, &i2c_info) != BP_RESULT_OK) {
+		ddc_service->ddc_pin = NULL;
+	} else {
+		DC_LOGGER_INIT(ddc_service->ctx->logger);
+		DC_LOG_DC("BIOS object table - i2c_line: %d", i2c_info.i2c_line);
+		DC_LOG_DC("BIOS object table - i2c_engine_id: %d", i2c_info.i2c_engine_id);
+
+		hw_info.ddc_channel = i2c_info.i2c_line;
+		if (ddc_service->link != NULL)
+			hw_info.hw_supported = i2c_info.i2c_hw_assist;
+		else
+			hw_info.hw_supported = false;
+
+		ddc_service->ddc_pin = dal_gpio_create_ddc(
+			gpio_service,
+			i2c_info.gpio_info.clk_a_register_index,
+			1 << i2c_info.gpio_info.clk_a_shift,
+			&hw_info);
+	}
+
+	ddc_service->flags.EDID_QUERY_DONE_ONCE = false;
+	ddc_service->flags.FORCE_READ_REPEATED_START = false;
+	ddc_service->flags.EDID_STRESS_READ = false;
+
+	ddc_service->flags.IS_INTERNAL_DISPLAY =
+		connector_id == CONNECTOR_ID_EDP ||
+		connector_id == CONNECTOR_ID_LVDS;
+
+	ddc_service->wa.raw = 0;
+}
+
+struct ddc_service *link_create_ddc_service(
+	struct ddc_service_init_data *init_data)
+{
+	struct ddc_service *ddc_service;
+
+	ddc_service = kzalloc(sizeof(struct ddc_service), GFP_KERNEL);
+
+	if (!ddc_service)
+		return NULL;
+
+	ddc_service_construct(ddc_service, init_data);
+	return ddc_service;
+}
+
+static void ddc_service_destruct(struct ddc_service *ddc)
+{
+	if (ddc->ddc_pin)
+		dal_gpio_destroy_ddc(&ddc->ddc_pin);
+}
+
+void link_destroy_ddc_service(struct ddc_service **ddc)
+{
+	if (!ddc || !*ddc) {
+		BREAK_TO_DEBUGGER();
+		return;
+	}
+	ddc_service_destruct(*ddc);
+	kfree(*ddc);
+	*ddc = NULL;
+}
+
+void set_ddc_transaction_type(
+	struct ddc_service *ddc,
+	enum ddc_transaction_type type)
+{
+	ddc->transaction_type = type;
+}
+
+bool link_is_in_aux_transaction_mode(struct ddc_service *ddc)
+{
+	switch (ddc->transaction_type) {
+	case DDC_TRANSACTION_TYPE_I2C_OVER_AUX:
+	case DDC_TRANSACTION_TYPE_I2C_OVER_AUX_WITH_DEFER:
+	case DDC_TRANSACTION_TYPE_I2C_OVER_AUX_RETRY_DEFER:
+		return true;
+	default:
+		break;
+	}
+	return false;
+}
+
+void set_dongle_type(struct ddc_service *ddc,
+		enum display_dongle_type dongle_type)
+{
+	ddc->dongle_type = dongle_type;
+}
+
+static uint32_t defer_delay_converter_wa(
+	struct ddc_service *ddc,
+	uint32_t defer_delay)
+{
+	struct dc_link *link = ddc->link;
+
+	if (link->dpcd_caps.dongle_type == DISPLAY_DONGLE_DP_VGA_CONVERTER &&
+		link->dpcd_caps.branch_dev_id == DP_BRANCH_DEVICE_ID_0080E1 &&
+		(link->dpcd_caps.branch_fw_revision[0] < 0x01 ||
+				(link->dpcd_caps.branch_fw_revision[0] == 0x01 &&
+				link->dpcd_caps.branch_fw_revision[1] < 0x40)) &&
+		!memcmp(link->dpcd_caps.branch_dev_name,
+		    DP_VGA_DONGLE_BRANCH_DEV_NAME,
+			sizeof(link->dpcd_caps.branch_dev_name)))
+
+		return defer_delay > DPVGA_DONGLE_AUX_DEFER_WA_DELAY ?
+			defer_delay : DPVGA_DONGLE_AUX_DEFER_WA_DELAY;
+
+	if (link->dpcd_caps.branch_dev_id == DP_BRANCH_DEVICE_ID_0080E1 &&
+	    !memcmp(link->dpcd_caps.branch_dev_name,
+		    DP_DVI_CONVERTER_ID_4,
+		    sizeof(link->dpcd_caps.branch_dev_name)))
+		return defer_delay > I2C_OVER_AUX_DEFER_WA_DELAY ?
+			defer_delay : I2C_OVER_AUX_DEFER_WA_DELAY;
+	if (link->dpcd_caps.branch_dev_id == DP_BRANCH_DEVICE_ID_006037 &&
+	    !memcmp(link->dpcd_caps.branch_dev_name,
+		    DP_DVI_CONVERTER_ID_5,
+		    sizeof(link->dpcd_caps.branch_dev_name)))
+		return defer_delay > I2C_OVER_AUX_DEFER_WA_DELAY_1MS ?
+			I2C_OVER_AUX_DEFER_WA_DELAY_1MS : defer_delay;
+
+	return defer_delay;
+}
+
+#define DP_TRANSLATOR_DELAY 5
+
+uint32_t link_get_aux_defer_delay(struct ddc_service *ddc)
+{
+	uint32_t defer_delay = 0;
+
+	switch (ddc->transaction_type) {
+	case DDC_TRANSACTION_TYPE_I2C_OVER_AUX:
+		if ((DISPLAY_DONGLE_DP_VGA_CONVERTER == ddc->dongle_type) ||
+			(DISPLAY_DONGLE_DP_DVI_CONVERTER == ddc->dongle_type) ||
+			(DISPLAY_DONGLE_DP_HDMI_CONVERTER ==
+				ddc->dongle_type)) {
+
+			defer_delay = DP_TRANSLATOR_DELAY;
+
+			defer_delay =
+				defer_delay_converter_wa(ddc, defer_delay);
+
+		} else /*sink has a delay different from an Active Converter*/
+			defer_delay = 0;
+		break;
+	case DDC_TRANSACTION_TYPE_I2C_OVER_AUX_WITH_DEFER:
+		defer_delay = DP_TRANSLATOR_DELAY;
+		break;
+	default:
+		break;
+	}
+	return defer_delay;
+}
+
+static bool submit_aux_command(struct ddc_service *ddc,
+		struct aux_payload *payload)
+{
+	uint32_t retrieved = 0;
+	bool ret = false;
+
+	if (!ddc)
+		return false;
+
+	if (!payload)
+		return false;
+
+	do {
+		struct aux_payload current_payload;
+		bool is_end_of_payload = (retrieved + DEFAULT_AUX_MAX_DATA_SIZE) >=
+				payload->length;
+		uint32_t payload_length = is_end_of_payload ?
+				payload->length - retrieved : DEFAULT_AUX_MAX_DATA_SIZE;
+
+		current_payload.address = payload->address;
+		current_payload.data = &payload->data[retrieved];
+		current_payload.defer_delay = payload->defer_delay;
+		current_payload.i2c_over_aux = payload->i2c_over_aux;
+		current_payload.length = payload_length;
+		/* set mot (middle of transaction) to false if it is the last payload */
+		current_payload.mot = is_end_of_payload ? payload->mot:true;
+		current_payload.write_status_update = false;
+		current_payload.reply = payload->reply;
+		current_payload.write = payload->write;
+
+		ret = link_aux_transfer_with_retries_no_mutex(ddc, &current_payload);
+
+		retrieved += payload_length;
+	} while (retrieved < payload->length && ret == true);
+
+	return ret;
+}
+
+bool link_query_ddc_data(
+	struct ddc_service *ddc,
+	uint32_t address,
+	uint8_t *write_buf,
+	uint32_t write_size,
+	uint8_t *read_buf,
+	uint32_t read_size)
+{
+	bool success = true;
+	uint32_t payload_size =
+		link_is_in_aux_transaction_mode(ddc) ?
+			DEFAULT_AUX_MAX_DATA_SIZE : EDID_SEGMENT_SIZE;
+
+	uint32_t write_payloads =
+		(write_size + payload_size - 1) / payload_size;
+
+	uint32_t read_payloads =
+		(read_size + payload_size - 1) / payload_size;
+
+	uint32_t payloads_num = write_payloads + read_payloads;
+
+	if (!payloads_num)
+		return false;
+
+	if (link_is_in_aux_transaction_mode(ddc)) {
+		struct aux_payload payload;
+
+		payload.i2c_over_aux = true;
+		payload.address = address;
+		payload.reply = NULL;
+		payload.defer_delay = link_get_aux_defer_delay(ddc);
+		payload.write_status_update = false;
+
+		if (write_size != 0) {
+			payload.write = true;
+			/* should not set mot (middle of transaction) to 0
+			 * if there are pending read payloads
+			 */
+			payload.mot = !(read_size == 0);
+			payload.length = write_size;
+			payload.data = write_buf;
+
+			success = submit_aux_command(ddc, &payload);
+		}
+
+		if (read_size != 0 && success) {
+			payload.write = false;
+			/* should set mot (middle of transaction) to 0
+			 * since it is the last payload to send
+			 */
+			payload.mot = false;
+			payload.length = read_size;
+			payload.data = read_buf;
+
+			success = submit_aux_command(ddc, &payload);
+		}
+	} else {
+		struct i2c_command command = {0};
+		struct i2c_payloads payloads;
+
+		if (!i2c_payloads_create(ddc->ctx, &payloads, payloads_num))
+			return false;
+
+		command.payloads = i2c_payloads_get(&payloads);
+		command.number_of_payloads = 0;
+		command.engine = DDC_I2C_COMMAND_ENGINE;
+		command.speed = ddc->ctx->dc->caps.i2c_speed_in_khz;
+
+		i2c_payloads_add(
+			&payloads, address, write_size, write_buf, true);
+
+		i2c_payloads_add(
+			&payloads, address, read_size, read_buf, false);
+
+		command.number_of_payloads =
+			i2c_payloads_get_count(&payloads);
+
+		success = dm_helpers_submit_i2c(
+				ddc->ctx,
+				ddc->link,
+				&command);
+
+		i2c_payloads_destroy(&payloads);
+	}
+
+	return success;
+}
+
+int link_aux_transfer_raw(struct ddc_service *ddc,
+		struct aux_payload *payload,
+		enum aux_return_code_type *operation_result)
+{
+	if (ddc->ctx->dc->debug.enable_dmub_aux_for_legacy_ddc ||
+	    !ddc->ddc_pin) {
+		return dce_aux_transfer_dmub_raw(ddc, payload, operation_result);
+	} else {
+		return dce_aux_transfer_raw(ddc, payload, operation_result);
+	}
+}
+
+uint32_t link_get_fixed_vs_pe_retimer_write_address(struct dc_link *link)
+{
+	uint32_t vendor_lttpr_write_address = 0xF004F;
+	uint8_t offset;
+
+	switch (link->dpcd_caps.lttpr_caps.phy_repeater_cnt) {
+	case 0x80: // 1 lttpr repeater
+		offset =  1;
+		break;
+	case 0x40: // 2 lttpr repeaters
+		offset = 2;
+		break;
+	case 0x20: // 3 lttpr repeaters
+		offset = 3;
+		break;
+	case 0x10: // 4 lttpr repeaters
+		offset = 4;
+		break;
+	case 0x08: // 5 lttpr repeaters
+		offset = 5;
+		break;
+	case 0x04: // 6 lttpr repeaters
+		offset = 6;
+		break;
+	case 0x02: // 7 lttpr repeaters
+		offset = 7;
+		break;
+	case 0x01: // 8 lttpr repeaters
+		offset = 8;
+		break;
+	default:
+		offset = 0xFF;
+	}
+
+	if (offset != 0xFF) {
+		vendor_lttpr_write_address +=
+				((DP_REPEATER_CONFIGURATION_AND_STATUS_SIZE) * (offset - 1));
+	}
+	return vendor_lttpr_write_address;
+}
+
+uint32_t link_get_fixed_vs_pe_retimer_read_address(struct dc_link *link)
+{
+	return link_get_fixed_vs_pe_retimer_write_address(link) + 4;
+}
+
+bool link_configure_fixed_vs_pe_retimer(struct ddc_service *ddc, const uint8_t *data, uint32_t length)
+{
+	struct aux_payload write_payload = {
+		.i2c_over_aux = false,
+		.write = true,
+		.address = link_get_fixed_vs_pe_retimer_write_address(ddc->link),
+		.length = length,
+		.data = (uint8_t *) data,
+		.reply = NULL,
+		.mot = I2C_MOT_UNDEF,
+		.write_status_update = false,
+		.defer_delay = 0,
+	};
+
+	return link_aux_transfer_with_retries_no_mutex(ddc,
+			&write_payload);
+}
+
+bool link_query_fixed_vs_pe_retimer(struct ddc_service *ddc, uint8_t *data, uint32_t length)
+{
+	struct aux_payload read_payload = {
+		.i2c_over_aux = false,
+		.write = false,
+		.address = link_get_fixed_vs_pe_retimer_read_address(ddc->link),
+		.length = length,
+		.data = data,
+		.reply = NULL,
+		.mot = I2C_MOT_UNDEF,
+		.write_status_update = false,
+		.defer_delay = 0,
+	};
+
+	return link_aux_transfer_with_retries_no_mutex(ddc,
+			&read_payload);
+}
+
+bool link_aux_transfer_with_retries_no_mutex(struct ddc_service *ddc,
+		struct aux_payload *payload)
+{
+	return dce_aux_transfer_with_retries(ddc, payload);
+}
+
+
+bool try_to_configure_aux_timeout(struct ddc_service *ddc,
+		uint32_t timeout)
+{
+	bool result = false;
+	struct ddc *ddc_pin = ddc->ddc_pin;
+
+	if ((ddc->link->chip_caps & EXT_DISPLAY_PATH_CAPS__DP_FIXED_VS_EN) &&
+			!ddc->link->dc->debug.disable_fixed_vs_aux_timeout_wa &&
+			ddc->ctx->dce_version == DCN_VERSION_3_1) {
+		/* Fixed VS workaround for AUX timeout */
+		const uint32_t fixed_vs_address = 0xF004F;
+		const uint8_t fixed_vs_data[4] = {0x1, 0x22, 0x63, 0xc};
+
+		core_link_write_dpcd(ddc->link,
+				fixed_vs_address,
+				fixed_vs_data,
+				sizeof(fixed_vs_data));
+
+		timeout = 3072;
+	}
+
+	/* Do not try to access nonexistent DDC pin. */
+	if (ddc->link->ep_type != DISPLAY_ENDPOINT_PHY)
+		return true;
+
+	if (ddc->ctx->dc->res_pool->engines[ddc_pin->pin_data->en]->funcs->configure_timeout) {
+		ddc->ctx->dc->res_pool->engines[ddc_pin->pin_data->en]->funcs->configure_timeout(ddc, timeout);
+		result = true;
+	}
+
+	return result;
+}
+
+struct ddc *get_ddc_pin(struct ddc_service *ddc_service)
+{
+	return ddc_service->ddc_pin;
+}
+
+void write_scdc_data(struct ddc_service *ddc_service,
+		uint32_t pix_clk,
+		bool lte_340_scramble)
+{
+	bool over_340_mhz = pix_clk > 340000 ? 1 : 0;
+	uint8_t slave_address = HDMI_SCDC_ADDRESS;
+	uint8_t offset = HDMI_SCDC_SINK_VERSION;
+	uint8_t sink_version = 0;
+	uint8_t write_buffer[2] = {0};
+	/*Lower than 340 Scramble bit from SCDC caps*/
+
+	if (ddc_service->link->local_sink &&
+		ddc_service->link->local_sink->edid_caps.panel_patch.skip_scdc_overwrite)
+		return;
+
+	link_query_ddc_data(ddc_service, slave_address, &offset,
+			sizeof(offset), &sink_version, sizeof(sink_version));
+	if (sink_version == 1) {
+		/*Source Version = 1*/
+		write_buffer[0] = HDMI_SCDC_SOURCE_VERSION;
+		write_buffer[1] = 1;
+		link_query_ddc_data(ddc_service, slave_address,
+				write_buffer, sizeof(write_buffer), NULL, 0);
+		/*Read Request from SCDC caps*/
+	}
+	write_buffer[0] = HDMI_SCDC_TMDS_CONFIG;
+
+	if (over_340_mhz) {
+		write_buffer[1] = 3;
+	} else if (lte_340_scramble) {
+		write_buffer[1] = 1;
+	} else {
+		write_buffer[1] = 0;
+	}
+	link_query_ddc_data(ddc_service, slave_address, write_buffer,
+			sizeof(write_buffer), NULL, 0);
+}
+
+void read_scdc_data(struct ddc_service *ddc_service)
+{
+	uint8_t slave_address = HDMI_SCDC_ADDRESS;
+	uint8_t offset = HDMI_SCDC_TMDS_CONFIG;
+	uint8_t tmds_config = 0;
+
+	if (ddc_service->link->local_sink &&
+		ddc_service->link->local_sink->edid_caps.panel_patch.skip_scdc_overwrite)
+		return;
+
+	link_query_ddc_data(ddc_service, slave_address, &offset,
+			sizeof(offset), &tmds_config, sizeof(tmds_config));
+	if (tmds_config & 0x1) {
+		union hdmi_scdc_status_flags_data status_data = {0};
+		uint8_t scramble_status = 0;
+
+		offset = HDMI_SCDC_SCRAMBLER_STATUS;
+		link_query_ddc_data(ddc_service, slave_address,
+				&offset, sizeof(offset), &scramble_status,
+				sizeof(scramble_status));
+		offset = HDMI_SCDC_STATUS_FLAGS;
+		link_query_ddc_data(ddc_service, slave_address,
+				&offset, sizeof(offset), &status_data.byte,
+				sizeof(status_data.byte));
+	}
+}
diff --git a/drivers/gpu/drm/amd/display/dc/link/protocols/link_ddc.h b/drivers/gpu/drm/amd/display/dc/link/protocols/link_ddc.h
new file mode 100644
index 000000000..a3e25e55b
--- /dev/null
+++ b/drivers/gpu/drm/amd/display/dc/link/protocols/link_ddc.h
@@ -0,0 +1,106 @@
+/*
+ * 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_DDC_SERVICE_H__
+#define __DAL_DDC_SERVICE_H__
+
+#include "link.h"
+
+#define AUX_POWER_UP_WA_DELAY 500
+#define I2C_OVER_AUX_DEFER_WA_DELAY 70
+#define DPVGA_DONGLE_AUX_DEFER_WA_DELAY 40
+#define I2C_OVER_AUX_DEFER_WA_DELAY_1MS 1
+#define LINK_AUX_DEFAULT_LTTPR_TIMEOUT_PERIOD 3200 /*us*/
+#define LINK_AUX_DEFAULT_TIMEOUT_PERIOD 552 /*us*/
+
+#define EDID_SEGMENT_SIZE 256
+
+struct ddc_service *link_create_ddc_service(
+		struct ddc_service_init_data *ddc_init_data);
+
+void link_destroy_ddc_service(struct ddc_service **ddc);
+
+void set_ddc_transaction_type(
+		struct ddc_service *ddc,
+		enum ddc_transaction_type type);
+
+uint32_t link_get_aux_defer_delay(struct ddc_service *ddc);
+
+bool link_is_in_aux_transaction_mode(struct ddc_service *ddc);
+
+bool try_to_configure_aux_timeout(struct ddc_service *ddc,
+		uint32_t timeout);
+
+bool link_query_ddc_data(
+		struct ddc_service *ddc,
+		uint32_t address,
+		uint8_t *write_buf,
+		uint32_t write_size,
+		uint8_t *read_buf,
+		uint32_t read_size);
+
+/* Attempt to submit an aux payload, retrying on timeouts, defers, and busy
+ * states as outlined in the DP spec.  Returns true if the request was
+ * successful.
+ *
+ * NOTE: The function requires explicit mutex on DM side in order to prevent
+ * potential race condition. DC components should call the dpcd read/write
+ * function in dm_helpers in order to access dpcd safely
+ */
+bool link_aux_transfer_with_retries_no_mutex(struct ddc_service *ddc,
+		struct aux_payload *payload);
+
+bool link_configure_fixed_vs_pe_retimer(
+		struct ddc_service *ddc,
+		const uint8_t *data,
+		uint32_t length);
+
+bool link_query_fixed_vs_pe_retimer(
+		struct ddc_service *ddc,
+		uint8_t *data,
+		uint32_t length);
+
+uint32_t link_get_fixed_vs_pe_retimer_read_address(struct dc_link *link);
+uint32_t link_get_fixed_vs_pe_retimer_write_address(struct dc_link *link);
+
+
+void write_scdc_data(
+		struct ddc_service *ddc_service,
+		uint32_t pix_clk,
+		bool lte_340_scramble);
+
+void read_scdc_data(
+		struct ddc_service *ddc_service);
+
+void set_dongle_type(struct ddc_service *ddc,
+		enum display_dongle_type dongle_type);
+
+struct ddc *get_ddc_pin(struct ddc_service *ddc_service);
+
+int link_aux_transfer_raw(struct ddc_service *ddc,
+		struct aux_payload *payload,
+		enum aux_return_code_type *operation_result);
+#endif /* __DAL_DDC_SERVICE_H__ */
+
diff --git a/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_capability.c b/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_capability.c
new file mode 100644
index 000000000..db87aa7b5
--- /dev/null
+++ b/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_capability.c
@@ -0,0 +1,2293 @@
+/*
+ * Copyright 2022 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
+ *
+ */
+
+/* FILE POLICY AND INTENDED USAGE:
+ * This file implements dp specific link capability retrieval sequence. It is
+ * responsible for retrieving, parsing, overriding, deciding capability obtained
+ * from dp link. Link capability consists of encoders, DPRXs, cables, retimers,
+ * usb and all other possible backend capabilities. Other components should
+ * include this header file in order to access link capability. Accessing link
+ * capability by dereferencing dc_link outside dp_link_capability is not a
+ * recommended method as it makes the component dependent on the underlying data
+ * structure used to represent link capability instead of function interfaces.
+ */
+
+#include "link_dp_capability.h"
+#include "link_ddc.h"
+#include "link_dpcd.h"
+#include "link_dp_dpia.h"
+#include "link_dp_phy.h"
+#include "link_edp_panel_control.h"
+#include "link_dp_irq_handler.h"
+#include "link/accessories/link_dp_trace.h"
+#include "link/link_detection.h"
+#include "link/link_validation.h"
+#include "link_dp_training.h"
+#include "atomfirmware.h"
+#include "resource.h"
+#include "link_enc_cfg.h"
+#include "dc_dmub_srv.h"
+#include "gpio_service_interface.h"
+
+#define DC_LOGGER \
+	link->ctx->logger
+#define DC_TRACE_LEVEL_MESSAGE(...) /* do nothing */
+
+#ifndef MAX
+#define MAX(X, Y) ((X) > (Y) ? (X) : (Y))
+#endif
+#ifndef MIN
+#define MIN(X, Y) ((X) < (Y) ? (X) : (Y))
+#endif
+
+struct dp_lt_fallback_entry {
+	enum dc_lane_count lane_count;
+	enum dc_link_rate link_rate;
+};
+
+static const struct dp_lt_fallback_entry dp_lt_fallbacks[] = {
+		/* This link training fallback array is ordered by
+		 * link bandwidth from highest to lowest.
+		 * DP specs makes it a normative policy to always
+		 * choose the next highest link bandwidth during
+		 * link training fallback.
+		 */
+		{LANE_COUNT_FOUR, LINK_RATE_UHBR20},
+		{LANE_COUNT_FOUR, LINK_RATE_UHBR13_5},
+		{LANE_COUNT_TWO, LINK_RATE_UHBR20},
+		{LANE_COUNT_FOUR, LINK_RATE_UHBR10},
+		{LANE_COUNT_TWO, LINK_RATE_UHBR13_5},
+		{LANE_COUNT_FOUR, LINK_RATE_HIGH3},
+		{LANE_COUNT_ONE, LINK_RATE_UHBR20},
+		{LANE_COUNT_TWO, LINK_RATE_UHBR10},
+		{LANE_COUNT_FOUR, LINK_RATE_HIGH2},
+		{LANE_COUNT_ONE, LINK_RATE_UHBR13_5},
+		{LANE_COUNT_TWO, LINK_RATE_HIGH3},
+		{LANE_COUNT_ONE, LINK_RATE_UHBR10},
+		{LANE_COUNT_TWO, LINK_RATE_HIGH2},
+		{LANE_COUNT_FOUR, LINK_RATE_HIGH},
+		{LANE_COUNT_ONE, LINK_RATE_HIGH3},
+		{LANE_COUNT_FOUR, LINK_RATE_LOW},
+		{LANE_COUNT_ONE, LINK_RATE_HIGH2},
+		{LANE_COUNT_TWO, LINK_RATE_HIGH},
+		{LANE_COUNT_TWO, LINK_RATE_LOW},
+		{LANE_COUNT_ONE, LINK_RATE_HIGH},
+		{LANE_COUNT_ONE, LINK_RATE_LOW},
+};
+
+static const struct dc_link_settings fail_safe_link_settings = {
+		.lane_count = LANE_COUNT_ONE,
+		.link_rate = LINK_RATE_LOW,
+		.link_spread = LINK_SPREAD_DISABLED,
+};
+
+bool is_dp_active_dongle(const struct dc_link *link)
+{
+	return (link->dpcd_caps.dongle_type >= DISPLAY_DONGLE_DP_VGA_CONVERTER) &&
+				(link->dpcd_caps.dongle_type <= DISPLAY_DONGLE_DP_HDMI_CONVERTER);
+}
+
+bool is_dp_branch_device(const struct dc_link *link)
+{
+	return link->dpcd_caps.is_branch_dev;
+}
+
+static int translate_dpcd_max_bpc(enum dpcd_downstream_port_max_bpc bpc)
+{
+	switch (bpc) {
+	case DOWN_STREAM_MAX_8BPC:
+		return 8;
+	case DOWN_STREAM_MAX_10BPC:
+		return 10;
+	case DOWN_STREAM_MAX_12BPC:
+		return 12;
+	case DOWN_STREAM_MAX_16BPC:
+		return 16;
+	default:
+		break;
+	}
+
+	return -1;
+}
+
+uint8_t dp_parse_lttpr_repeater_count(uint8_t lttpr_repeater_count)
+{
+	switch (lttpr_repeater_count) {
+	case 0x80: // 1 lttpr repeater
+		return 1;
+	case 0x40: // 2 lttpr repeaters
+		return 2;
+	case 0x20: // 3 lttpr repeaters
+		return 3;
+	case 0x10: // 4 lttpr repeaters
+		return 4;
+	case 0x08: // 5 lttpr repeaters
+		return 5;
+	case 0x04: // 6 lttpr repeaters
+		return 6;
+	case 0x02: // 7 lttpr repeaters
+		return 7;
+	case 0x01: // 8 lttpr repeaters
+		return 8;
+	default:
+		break;
+	}
+	return 0; // invalid value
+}
+
+uint32_t link_bw_kbps_from_raw_frl_link_rate_data(uint8_t bw)
+{
+	switch (bw) {
+	case 0b001:
+		return 9000000;
+	case 0b010:
+		return 18000000;
+	case 0b011:
+		return 24000000;
+	case 0b100:
+		return 32000000;
+	case 0b101:
+		return 40000000;
+	case 0b110:
+		return 48000000;
+	}
+
+	return 0;
+}
+
+static enum dc_link_rate linkRateInKHzToLinkRateMultiplier(uint32_t link_rate_in_khz)
+{
+	enum dc_link_rate link_rate;
+	// LinkRate is normally stored as a multiplier of 0.27 Gbps per lane. Do the translation.
+	switch (link_rate_in_khz) {
+	case 1620000:
+		link_rate = LINK_RATE_LOW;	// Rate_1 (RBR)	- 1.62 Gbps/Lane
+		break;
+	case 2160000:
+		link_rate = LINK_RATE_RATE_2;	// Rate_2	- 2.16 Gbps/Lane
+		break;
+	case 2430000:
+		link_rate = LINK_RATE_RATE_3;	// Rate_3	- 2.43 Gbps/Lane
+		break;
+	case 2700000:
+		link_rate = LINK_RATE_HIGH;	// Rate_4 (HBR)	- 2.70 Gbps/Lane
+		break;
+	case 3240000:
+		link_rate = LINK_RATE_RBR2;	// Rate_5 (RBR2)- 3.24 Gbps/Lane
+		break;
+	case 4320000:
+		link_rate = LINK_RATE_RATE_6;	// Rate_6	- 4.32 Gbps/Lane
+		break;
+	case 5400000:
+		link_rate = LINK_RATE_HIGH2;	// Rate_7 (HBR2)- 5.40 Gbps/Lane
+		break;
+	case 6750000:
+		link_rate = LINK_RATE_RATE_8;	// Rate_8	- 6.75 Gbps/Lane
+		break;
+	case 8100000:
+		link_rate = LINK_RATE_HIGH3;	// Rate_9 (HBR3)- 8.10 Gbps/Lane
+		break;
+	default:
+		link_rate = LINK_RATE_UNKNOWN;
+		break;
+	}
+	return link_rate;
+}
+
+static union dp_cable_id intersect_cable_id(
+		union dp_cable_id *a, union dp_cable_id *b)
+{
+	union dp_cable_id out;
+
+	out.bits.UHBR10_20_CAPABILITY = MIN(a->bits.UHBR10_20_CAPABILITY,
+			b->bits.UHBR10_20_CAPABILITY);
+	out.bits.UHBR13_5_CAPABILITY = MIN(a->bits.UHBR13_5_CAPABILITY,
+			b->bits.UHBR13_5_CAPABILITY);
+	out.bits.CABLE_TYPE = MAX(a->bits.CABLE_TYPE, b->bits.CABLE_TYPE);
+
+	return out;
+}
+
+/*
+ * Return PCON's post FRL link training supported BW if its non-zero, otherwise return max_supported_frl_bw.
+ */
+static uint32_t intersect_frl_link_bw_support(
+	const uint32_t max_supported_frl_bw_in_kbps,
+	const union hdmi_encoded_link_bw hdmi_encoded_link_bw)
+{
+	uint32_t supported_bw_in_kbps = max_supported_frl_bw_in_kbps;
+
+	// HDMI_ENCODED_LINK_BW bits are only valid if HDMI Link Configuration bit is 1 (FRL mode)
+	if (hdmi_encoded_link_bw.bits.FRL_MODE) {
+		if (hdmi_encoded_link_bw.bits.BW_48Gbps)
+			supported_bw_in_kbps = 48000000;
+		else if (hdmi_encoded_link_bw.bits.BW_40Gbps)
+			supported_bw_in_kbps = 40000000;
+		else if (hdmi_encoded_link_bw.bits.BW_32Gbps)
+			supported_bw_in_kbps = 32000000;
+		else if (hdmi_encoded_link_bw.bits.BW_24Gbps)
+			supported_bw_in_kbps = 24000000;
+		else if (hdmi_encoded_link_bw.bits.BW_18Gbps)
+			supported_bw_in_kbps = 18000000;
+		else if (hdmi_encoded_link_bw.bits.BW_9Gbps)
+			supported_bw_in_kbps = 9000000;
+	}
+
+	return supported_bw_in_kbps;
+}
+
+static enum clock_source_id get_clock_source_id(struct dc_link *link)
+{
+	enum clock_source_id dp_cs_id = CLOCK_SOURCE_ID_UNDEFINED;
+	struct clock_source *dp_cs = link->dc->res_pool->dp_clock_source;
+
+	if (dp_cs != NULL) {
+		dp_cs_id = dp_cs->id;
+	} else {
+		/*
+		 * dp clock source is not initialized for some reason.
+		 * Should not happen, CLOCK_SOURCE_ID_EXTERNAL will be used
+		 */
+		ASSERT(dp_cs);
+	}
+
+	return dp_cs_id;
+}
+
+static void dp_wa_power_up_0010FA(struct dc_link *link, uint8_t *dpcd_data,
+		int length)
+{
+	int retry = 0;
+
+	if (!link->dpcd_caps.dpcd_rev.raw) {
+		do {
+			dpcd_write_rx_power_ctrl(link, true);
+			core_link_read_dpcd(link, DP_DPCD_REV,
+							dpcd_data, length);
+			link->dpcd_caps.dpcd_rev.raw = dpcd_data[
+				DP_DPCD_REV -
+				DP_DPCD_REV];
+		} while (retry++ < 4 && !link->dpcd_caps.dpcd_rev.raw);
+	}
+
+	if (link->dpcd_caps.dongle_type == DISPLAY_DONGLE_DP_VGA_CONVERTER) {
+		switch (link->dpcd_caps.branch_dev_id) {
+		/* 0010FA active dongles (DP-VGA, DP-DLDVI converters) power down
+		 * all internal circuits including AUX communication preventing
+		 * reading DPCD table and EDID (spec violation).
+		 * Encoder will skip DP RX power down on disable_output to
+		 * keep receiver powered all the time.*/
+		case DP_BRANCH_DEVICE_ID_0010FA:
+		case DP_BRANCH_DEVICE_ID_0080E1:
+		case DP_BRANCH_DEVICE_ID_00E04C:
+			link->wa_flags.dp_keep_receiver_powered = true;
+			break;
+
+		/* TODO: May need work around for other dongles. */
+		default:
+			link->wa_flags.dp_keep_receiver_powered = false;
+			break;
+		}
+	} else
+		link->wa_flags.dp_keep_receiver_powered = false;
+}
+
+bool dp_is_fec_supported(const struct dc_link *link)
+{
+	/* TODO - use asic cap instead of link_enc->features
+	 * we no longer know which link enc to use for this link before commit
+	 */
+	struct link_encoder *link_enc = NULL;
+
+	link_enc = link_enc_cfg_get_link_enc(link);
+	ASSERT(link_enc);
+
+	return (dc_is_dp_signal(link->connector_signal) && link_enc &&
+			link_enc->features.fec_supported &&
+			link->dpcd_caps.fec_cap.bits.FEC_CAPABLE);
+}
+
+bool dp_should_enable_fec(const struct dc_link *link)
+{
+	bool force_disable = false;
+
+	if (link->fec_state == dc_link_fec_enabled)
+		force_disable = false;
+	else if (link->connector_signal != SIGNAL_TYPE_DISPLAY_PORT_MST &&
+			link->local_sink &&
+			link->local_sink->edid_caps.panel_patch.disable_fec)
+		force_disable = true;
+	else if (link->connector_signal == SIGNAL_TYPE_EDP
+			&& (link->dpcd_caps.dsc_caps.dsc_basic_caps.fields.
+			 dsc_support.DSC_SUPPORT == false
+				|| link->panel_config.dsc.disable_dsc_edp
+				|| !link->dc->caps.edp_dsc_support))
+		force_disable = true;
+
+	return !force_disable && dp_is_fec_supported(link);
+}
+
+bool dp_is_128b_132b_signal(struct pipe_ctx *pipe_ctx)
+{
+	/* If this assert is hit then we have a link encoder dynamic management issue */
+	ASSERT(pipe_ctx->stream_res.hpo_dp_stream_enc ? pipe_ctx->link_res.hpo_dp_link_enc != NULL : true);
+	return (pipe_ctx->stream_res.hpo_dp_stream_enc &&
+			pipe_ctx->link_res.hpo_dp_link_enc &&
+			dc_is_dp_signal(pipe_ctx->stream->signal));
+}
+
+bool dp_is_lttpr_present(struct dc_link *link)
+{
+	return (dp_parse_lttpr_repeater_count(link->dpcd_caps.lttpr_caps.phy_repeater_cnt) != 0 &&
+			link->dpcd_caps.lttpr_caps.max_lane_count > 0 &&
+			link->dpcd_caps.lttpr_caps.max_lane_count <= 4 &&
+			link->dpcd_caps.lttpr_caps.revision.raw >= 0x14);
+}
+
+/* in DP compliance test, DPR-120 may have
+ * a random value in its MAX_LINK_BW dpcd field.
+ * We map it to the maximum supported link rate that
+ * is smaller than MAX_LINK_BW in this case.
+ */
+static enum dc_link_rate get_link_rate_from_max_link_bw(
+		 uint8_t max_link_bw)
+{
+	enum dc_link_rate link_rate;
+
+	if (max_link_bw >= LINK_RATE_HIGH3) {
+		link_rate = LINK_RATE_HIGH3;
+	} else if (max_link_bw < LINK_RATE_HIGH3
+			&& max_link_bw >= LINK_RATE_HIGH2) {
+		link_rate = LINK_RATE_HIGH2;
+	} else if (max_link_bw < LINK_RATE_HIGH2
+			&& max_link_bw >= LINK_RATE_HIGH) {
+		link_rate = LINK_RATE_HIGH;
+	} else if (max_link_bw < LINK_RATE_HIGH
+			&& max_link_bw >= LINK_RATE_LOW) {
+		link_rate = LINK_RATE_LOW;
+	} else {
+		link_rate = LINK_RATE_UNKNOWN;
+	}
+
+	return link_rate;
+}
+
+static enum dc_link_rate get_lttpr_max_link_rate(struct dc_link *link)
+{
+	enum dc_link_rate lttpr_max_link_rate = link->dpcd_caps.lttpr_caps.max_link_rate;
+
+	if (link->dpcd_caps.lttpr_caps.supported_128b_132b_rates.bits.UHBR20)
+		lttpr_max_link_rate = LINK_RATE_UHBR20;
+	else if (link->dpcd_caps.lttpr_caps.supported_128b_132b_rates.bits.UHBR13_5)
+		lttpr_max_link_rate = LINK_RATE_UHBR13_5;
+	else if (link->dpcd_caps.lttpr_caps.supported_128b_132b_rates.bits.UHBR10)
+		lttpr_max_link_rate = LINK_RATE_UHBR10;
+
+	return lttpr_max_link_rate;
+}
+
+static enum dc_link_rate get_cable_max_link_rate(struct dc_link *link)
+{
+	enum dc_link_rate cable_max_link_rate = LINK_RATE_UNKNOWN;
+
+	if (link->dpcd_caps.cable_id.bits.UHBR10_20_CAPABILITY & DP_UHBR20)
+		cable_max_link_rate = LINK_RATE_UHBR20;
+	else if (link->dpcd_caps.cable_id.bits.UHBR13_5_CAPABILITY)
+		cable_max_link_rate = LINK_RATE_UHBR13_5;
+	else if (link->dpcd_caps.cable_id.bits.UHBR10_20_CAPABILITY & DP_UHBR10)
+		cable_max_link_rate = LINK_RATE_UHBR10;
+
+	return cable_max_link_rate;
+}
+
+static inline bool reached_minimum_lane_count(enum dc_lane_count lane_count)
+{
+	return lane_count <= LANE_COUNT_ONE;
+}
+
+static inline bool reached_minimum_link_rate(enum dc_link_rate link_rate)
+{
+	return link_rate <= LINK_RATE_LOW;
+}
+
+static enum dc_lane_count reduce_lane_count(enum dc_lane_count lane_count)
+{
+	switch (lane_count) {
+	case LANE_COUNT_FOUR:
+		return LANE_COUNT_TWO;
+	case LANE_COUNT_TWO:
+		return LANE_COUNT_ONE;
+	case LANE_COUNT_ONE:
+		return LANE_COUNT_UNKNOWN;
+	default:
+		return LANE_COUNT_UNKNOWN;
+	}
+}
+
+static enum dc_link_rate reduce_link_rate(const struct dc_link *link, enum dc_link_rate link_rate)
+{
+	// NEEDSWORK: provide some details about why this function never returns some of the
+	// obscure link rates such as 4.32 Gbps or 3.24 Gbps and if such behavior is intended.
+	//
+
+	switch (link_rate) {
+	case LINK_RATE_UHBR20:
+		return LINK_RATE_UHBR13_5;
+	case LINK_RATE_UHBR13_5:
+		return LINK_RATE_UHBR10;
+	case LINK_RATE_UHBR10:
+		return LINK_RATE_HIGH3;
+	case LINK_RATE_HIGH3:
+		if (link->connector_signal == SIGNAL_TYPE_EDP && link->dc->debug.support_eDP1_5)
+			return LINK_RATE_RATE_8;
+		return LINK_RATE_HIGH2;
+	case LINK_RATE_RATE_8:
+		return LINK_RATE_HIGH2;
+	case LINK_RATE_HIGH2:
+		return LINK_RATE_HIGH;
+	case LINK_RATE_RATE_6:
+	case LINK_RATE_RBR2:
+		return LINK_RATE_HIGH;
+	case LINK_RATE_HIGH:
+		return LINK_RATE_LOW;
+	case LINK_RATE_RATE_3:
+	case LINK_RATE_RATE_2:
+		return LINK_RATE_LOW;
+	case LINK_RATE_LOW:
+	default:
+		return LINK_RATE_UNKNOWN;
+	}
+}
+
+static enum dc_lane_count increase_lane_count(enum dc_lane_count lane_count)
+{
+	switch (lane_count) {
+	case LANE_COUNT_ONE:
+		return LANE_COUNT_TWO;
+	case LANE_COUNT_TWO:
+		return LANE_COUNT_FOUR;
+	default:
+		return LANE_COUNT_UNKNOWN;
+	}
+}
+
+static enum dc_link_rate increase_link_rate(struct dc_link *link,
+		enum dc_link_rate link_rate)
+{
+	switch (link_rate) {
+	case LINK_RATE_LOW:
+		return LINK_RATE_HIGH;
+	case LINK_RATE_HIGH:
+		return LINK_RATE_HIGH2;
+	case LINK_RATE_HIGH2:
+		return LINK_RATE_HIGH3;
+	case LINK_RATE_HIGH3:
+		return LINK_RATE_UHBR10;
+	case LINK_RATE_UHBR10:
+		/* upto DP2.x specs UHBR13.5 is the only link rate that could be
+		 * not supported by DPRX when higher link rate is supported.
+		 * so we treat it as a special case for code simplicity. When we
+		 * have new specs with more link rates like this, we should
+		 * consider a more generic solution to handle discrete link
+		 * rate capabilities.
+		 */
+		return link->dpcd_caps.dp_128b_132b_supported_link_rates.bits.UHBR13_5 ?
+				LINK_RATE_UHBR13_5 : LINK_RATE_UHBR20;
+	case LINK_RATE_UHBR13_5:
+		return LINK_RATE_UHBR20;
+	default:
+		return LINK_RATE_UNKNOWN;
+	}
+}
+
+static bool decide_fallback_link_setting_max_bw_policy(
+		struct dc_link *link,
+		const struct dc_link_settings *max,
+		struct dc_link_settings *cur,
+		enum link_training_result training_result)
+{
+	uint8_t cur_idx = 0, next_idx;
+	bool found = false;
+
+	if (training_result == LINK_TRAINING_ABORT)
+		return false;
+
+	while (cur_idx < ARRAY_SIZE(dp_lt_fallbacks))
+		/* find current index */
+		if (dp_lt_fallbacks[cur_idx].lane_count == cur->lane_count &&
+				dp_lt_fallbacks[cur_idx].link_rate == cur->link_rate)
+			break;
+		else
+			cur_idx++;
+
+	next_idx = cur_idx + 1;
+
+	while (next_idx < ARRAY_SIZE(dp_lt_fallbacks))
+		/* find next index */
+		if (dp_lt_fallbacks[next_idx].lane_count > max->lane_count ||
+				dp_lt_fallbacks[next_idx].link_rate > max->link_rate)
+			next_idx++;
+		else if (dp_lt_fallbacks[next_idx].link_rate == LINK_RATE_UHBR13_5 &&
+				link->dpcd_caps.dp_128b_132b_supported_link_rates.bits.UHBR13_5 == 0)
+			/* upto DP2.x specs UHBR13.5 is the only link rate that
+			 * could be not supported by DPRX when higher link rate
+			 * is supported. so we treat it as a special case for
+			 * code simplicity. When we have new specs with more
+			 * link rates like this, we should consider a more
+			 * generic solution to handle discrete link rate
+			 * capabilities.
+			 */
+			next_idx++;
+		else
+			break;
+
+	if (next_idx < ARRAY_SIZE(dp_lt_fallbacks)) {
+		cur->lane_count = dp_lt_fallbacks[next_idx].lane_count;
+		cur->link_rate = dp_lt_fallbacks[next_idx].link_rate;
+		found = true;
+	}
+
+	return found;
+}
+
+/*
+ * function: set link rate and lane count fallback based
+ * on current link setting and last link training result
+ * return value:
+ *			true - link setting could be set
+ *			false - has reached minimum setting
+ *					and no further fallback could be done
+ */
+bool decide_fallback_link_setting(
+		struct dc_link *link,
+		struct dc_link_settings *max,
+		struct dc_link_settings *cur,
+		enum link_training_result training_result)
+{
+	if (link_dp_get_encoding_format(max) == DP_128b_132b_ENCODING ||
+			link->dc->debug.force_dp2_lt_fallback_method)
+		return decide_fallback_link_setting_max_bw_policy(link, max,
+				cur, training_result);
+
+	switch (training_result) {
+	case LINK_TRAINING_CR_FAIL_LANE0:
+	case LINK_TRAINING_CR_FAIL_LANE1:
+	case LINK_TRAINING_CR_FAIL_LANE23:
+	case LINK_TRAINING_LQA_FAIL:
+	{
+		if (!reached_minimum_link_rate(cur->link_rate)) {
+			cur->link_rate = reduce_link_rate(link, cur->link_rate);
+		} else if (!reached_minimum_lane_count(cur->lane_count)) {
+			cur->link_rate = max->link_rate;
+			if (training_result == LINK_TRAINING_CR_FAIL_LANE0)
+				return false;
+			else if (training_result == LINK_TRAINING_CR_FAIL_LANE1)
+				cur->lane_count = LANE_COUNT_ONE;
+			else if (training_result == LINK_TRAINING_CR_FAIL_LANE23)
+				cur->lane_count = LANE_COUNT_TWO;
+			else
+				cur->lane_count = reduce_lane_count(cur->lane_count);
+		} else {
+			return false;
+		}
+		break;
+	}
+	case LINK_TRAINING_EQ_FAIL_EQ:
+	case LINK_TRAINING_EQ_FAIL_CR_PARTIAL:
+	{
+		if (!reached_minimum_lane_count(cur->lane_count)) {
+			cur->lane_count = reduce_lane_count(cur->lane_count);
+		} else if (!reached_minimum_link_rate(cur->link_rate)) {
+			cur->link_rate = reduce_link_rate(link, cur->link_rate);
+			/* Reduce max link rate to avoid potential infinite loop.
+			 * Needed so that any subsequent CR_FAIL fallback can't
+			 * re-set the link rate higher than the link rate from
+			 * the latest EQ_FAIL fallback.
+			 */
+			max->link_rate = cur->link_rate;
+			cur->lane_count = max->lane_count;
+		} else {
+			return false;
+		}
+		break;
+	}
+	case LINK_TRAINING_EQ_FAIL_CR:
+	{
+		if (!reached_minimum_link_rate(cur->link_rate)) {
+			cur->link_rate = reduce_link_rate(link, cur->link_rate);
+			/* Reduce max link rate to avoid potential infinite loop.
+			 * Needed so that any subsequent CR_FAIL fallback can't
+			 * re-set the link rate higher than the link rate from
+			 * the latest EQ_FAIL fallback.
+			 */
+			max->link_rate = cur->link_rate;
+			cur->lane_count = max->lane_count;
+		} else {
+			return false;
+		}
+		break;
+	}
+	default:
+		return false;
+	}
+	return true;
+}
+static bool decide_dp_link_settings(struct dc_link *link, struct dc_link_settings *link_setting, uint32_t req_bw)
+{
+	struct dc_link_settings initial_link_setting = {
+		LANE_COUNT_ONE, LINK_RATE_LOW, LINK_SPREAD_DISABLED, false, 0};
+	struct dc_link_settings current_link_setting =
+			initial_link_setting;
+	uint32_t link_bw;
+
+	if (req_bw > dp_link_bandwidth_kbps(link, &link->verified_link_cap))
+		return false;
+
+	/* search for the minimum link setting that:
+	 * 1. is supported according to the link training result
+	 * 2. could support the b/w requested by the timing
+	 */
+	while (current_link_setting.link_rate <=
+			link->verified_link_cap.link_rate) {
+		link_bw = dp_link_bandwidth_kbps(
+				link,
+				&current_link_setting);
+		if (req_bw <= link_bw) {
+			*link_setting = current_link_setting;
+			return true;
+		}
+
+		if (current_link_setting.lane_count <
+				link->verified_link_cap.lane_count) {
+			current_link_setting.lane_count =
+					increase_lane_count(
+							current_link_setting.lane_count);
+		} else {
+			current_link_setting.link_rate =
+					increase_link_rate(link,
+							current_link_setting.link_rate);
+			current_link_setting.lane_count =
+					initial_link_setting.lane_count;
+		}
+	}
+
+	return false;
+}
+
+bool edp_decide_link_settings(struct dc_link *link,
+		struct dc_link_settings *link_setting, uint32_t req_bw)
+{
+	struct dc_link_settings initial_link_setting;
+	struct dc_link_settings current_link_setting;
+	uint32_t link_bw;
+
+	/*
+	 * edp_supported_link_rates_count is only valid for eDP v1.4 or higher.
+	 * Per VESA eDP spec, "The DPCD revision for eDP v1.4 is 13h"
+	 */
+	if (!edp_is_ilr_optimization_enabled(link)) {
+		*link_setting = link->verified_link_cap;
+		return true;
+	}
+
+	memset(&initial_link_setting, 0, sizeof(initial_link_setting));
+	initial_link_setting.lane_count = LANE_COUNT_ONE;
+	initial_link_setting.link_rate = link->dpcd_caps.edp_supported_link_rates[0];
+	initial_link_setting.link_spread = LINK_SPREAD_DISABLED;
+	initial_link_setting.use_link_rate_set = true;
+	initial_link_setting.link_rate_set = 0;
+	current_link_setting = initial_link_setting;
+
+	/* search for the minimum link setting that:
+	 * 1. is supported according to the link training result
+	 * 2. could support the b/w requested by the timing
+	 */
+	while (current_link_setting.link_rate <=
+			link->verified_link_cap.link_rate) {
+		link_bw = dp_link_bandwidth_kbps(
+				link,
+				&current_link_setting);
+		if (req_bw <= link_bw) {
+			*link_setting = current_link_setting;
+			return true;
+		}
+
+		if (current_link_setting.lane_count <
+				link->verified_link_cap.lane_count) {
+			current_link_setting.lane_count =
+					increase_lane_count(
+							current_link_setting.lane_count);
+		} else {
+			if (current_link_setting.link_rate_set < link->dpcd_caps.edp_supported_link_rates_count) {
+				current_link_setting.link_rate_set++;
+				current_link_setting.link_rate =
+					link->dpcd_caps.edp_supported_link_rates[current_link_setting.link_rate_set];
+				current_link_setting.lane_count =
+									initial_link_setting.lane_count;
+			} else
+				break;
+		}
+	}
+	return false;
+}
+
+bool decide_edp_link_settings_with_dsc(struct dc_link *link,
+		struct dc_link_settings *link_setting,
+		uint32_t req_bw,
+		enum dc_link_rate max_link_rate)
+{
+	struct dc_link_settings initial_link_setting;
+	struct dc_link_settings current_link_setting;
+	uint32_t link_bw;
+
+	unsigned int policy = 0;
+
+	policy = link->panel_config.dsc.force_dsc_edp_policy;
+	if (max_link_rate == LINK_RATE_UNKNOWN)
+		max_link_rate = link->verified_link_cap.link_rate;
+	/*
+	 * edp_supported_link_rates_count is only valid for eDP v1.4 or higher.
+	 * Per VESA eDP spec, "The DPCD revision for eDP v1.4 is 13h"
+	 */
+	if (!edp_is_ilr_optimization_enabled(link)) {
+		/* for DSC enabled case, we search for minimum lane count */
+		memset(&initial_link_setting, 0, sizeof(initial_link_setting));
+		initial_link_setting.lane_count = LANE_COUNT_ONE;
+		initial_link_setting.link_rate = LINK_RATE_LOW;
+		initial_link_setting.link_spread = LINK_SPREAD_DISABLED;
+		initial_link_setting.use_link_rate_set = false;
+		initial_link_setting.link_rate_set = 0;
+		current_link_setting = initial_link_setting;
+		if (req_bw > dp_link_bandwidth_kbps(link, &link->verified_link_cap))
+			return false;
+
+		/* search for the minimum link setting that:
+		 * 1. is supported according to the link training result
+		 * 2. could support the b/w requested by the timing
+		 */
+		while (current_link_setting.link_rate <=
+				max_link_rate) {
+			link_bw = dp_link_bandwidth_kbps(
+					link,
+					&current_link_setting);
+			if (req_bw <= link_bw) {
+				*link_setting = current_link_setting;
+				return true;
+			}
+			if (policy) {
+				/* minimize lane */
+				if (current_link_setting.link_rate < max_link_rate) {
+					current_link_setting.link_rate =
+							increase_link_rate(link,
+									current_link_setting.link_rate);
+				} else {
+					if (current_link_setting.lane_count <
+									link->verified_link_cap.lane_count) {
+						current_link_setting.lane_count =
+								increase_lane_count(
+										current_link_setting.lane_count);
+						current_link_setting.link_rate = initial_link_setting.link_rate;
+					} else
+						break;
+				}
+			} else {
+				/* minimize link rate */
+				if (current_link_setting.lane_count <
+						link->verified_link_cap.lane_count) {
+					current_link_setting.lane_count =
+							increase_lane_count(
+									current_link_setting.lane_count);
+				} else {
+					current_link_setting.link_rate =
+							increase_link_rate(link,
+									current_link_setting.link_rate);
+					current_link_setting.lane_count =
+							initial_link_setting.lane_count;
+				}
+			}
+		}
+		return false;
+	}
+
+	/* if optimize edp link is supported */
+	memset(&initial_link_setting, 0, sizeof(initial_link_setting));
+	initial_link_setting.lane_count = LANE_COUNT_ONE;
+	initial_link_setting.link_rate = link->dpcd_caps.edp_supported_link_rates[0];
+	initial_link_setting.link_spread = LINK_SPREAD_DISABLED;
+	initial_link_setting.use_link_rate_set = true;
+	initial_link_setting.link_rate_set = 0;
+	current_link_setting = initial_link_setting;
+
+	/* search for the minimum link setting that:
+	 * 1. is supported according to the link training result
+	 * 2. could support the b/w requested by the timing
+	 */
+	while (current_link_setting.link_rate <=
+			max_link_rate) {
+		link_bw = dp_link_bandwidth_kbps(
+				link,
+				&current_link_setting);
+		if (req_bw <= link_bw) {
+			*link_setting = current_link_setting;
+			return true;
+		}
+		if (policy) {
+			/* minimize lane */
+			if (current_link_setting.link_rate_set <
+					link->dpcd_caps.edp_supported_link_rates_count
+					&& current_link_setting.link_rate < max_link_rate) {
+				current_link_setting.link_rate_set++;
+				current_link_setting.link_rate =
+					link->dpcd_caps.edp_supported_link_rates[current_link_setting.link_rate_set];
+			} else {
+				if (current_link_setting.lane_count < link->verified_link_cap.lane_count) {
+					current_link_setting.lane_count =
+							increase_lane_count(
+									current_link_setting.lane_count);
+					current_link_setting.link_rate_set = initial_link_setting.link_rate_set;
+					current_link_setting.link_rate =
+						link->dpcd_caps.edp_supported_link_rates[current_link_setting.link_rate_set];
+				} else
+					break;
+			}
+		} else {
+			/* minimize link rate */
+			if (current_link_setting.lane_count <
+					link->verified_link_cap.lane_count) {
+				current_link_setting.lane_count =
+						increase_lane_count(
+								current_link_setting.lane_count);
+			} else {
+				if (current_link_setting.link_rate_set < link->dpcd_caps.edp_supported_link_rates_count) {
+					current_link_setting.link_rate_set++;
+					current_link_setting.link_rate =
+						link->dpcd_caps.edp_supported_link_rates[current_link_setting.link_rate_set];
+					current_link_setting.lane_count =
+						initial_link_setting.lane_count;
+				} else
+					break;
+			}
+		}
+	}
+	return false;
+}
+
+static bool decide_mst_link_settings(const struct dc_link *link, struct dc_link_settings *link_setting)
+{
+	*link_setting = link->verified_link_cap;
+	return true;
+}
+
+bool link_decide_link_settings(struct dc_stream_state *stream,
+	struct dc_link_settings *link_setting)
+{
+	struct dc_link *link = stream->link;
+	uint32_t req_bw = dc_bandwidth_in_kbps_from_timing(&stream->timing, dc_link_get_highest_encoding_format(link));
+
+	memset(link_setting, 0, sizeof(*link_setting));
+
+	/* if preferred is specified through AMDDP, use it, if it's enough
+	 * to drive the mode
+	 */
+	if (link->preferred_link_setting.lane_count !=
+			LANE_COUNT_UNKNOWN &&
+			link->preferred_link_setting.link_rate !=
+					LINK_RATE_UNKNOWN) {
+		*link_setting = link->preferred_link_setting;
+		return true;
+	}
+
+	/* MST doesn't perform link training for now
+	 * TODO: add MST specific link training routine
+	 */
+	if (stream->signal == SIGNAL_TYPE_DISPLAY_PORT_MST) {
+		decide_mst_link_settings(link, link_setting);
+	} else if (link->connector_signal == SIGNAL_TYPE_EDP) {
+		/* enable edp link optimization for DSC eDP case */
+		if (stream->timing.flags.DSC) {
+			enum dc_link_rate max_link_rate = LINK_RATE_UNKNOWN;
+
+			if (link->panel_config.dsc.force_dsc_edp_policy) {
+				/* calculate link max link rate cap*/
+				struct dc_link_settings tmp_link_setting;
+				struct dc_crtc_timing tmp_timing = stream->timing;
+				uint32_t orig_req_bw;
+
+				tmp_link_setting.link_rate = LINK_RATE_UNKNOWN;
+				tmp_timing.flags.DSC = 0;
+				orig_req_bw = dc_bandwidth_in_kbps_from_timing(&tmp_timing,
+						dc_link_get_highest_encoding_format(link));
+				edp_decide_link_settings(link, &tmp_link_setting, orig_req_bw);
+				max_link_rate = tmp_link_setting.link_rate;
+			}
+			decide_edp_link_settings_with_dsc(link, link_setting, req_bw, max_link_rate);
+		} else {
+			edp_decide_link_settings(link, link_setting, req_bw);
+		}
+	} else {
+		decide_dp_link_settings(link, link_setting, req_bw);
+	}
+
+	return link_setting->lane_count != LANE_COUNT_UNKNOWN &&
+			link_setting->link_rate != LINK_RATE_UNKNOWN;
+}
+
+enum dp_link_encoding link_dp_get_encoding_format(const struct dc_link_settings *link_settings)
+{
+	if ((link_settings->link_rate >= LINK_RATE_LOW) &&
+			(link_settings->link_rate <= LINK_RATE_HIGH3))
+		return DP_8b_10b_ENCODING;
+	else if ((link_settings->link_rate >= LINK_RATE_UHBR10) &&
+			(link_settings->link_rate <= LINK_RATE_UHBR20))
+		return DP_128b_132b_ENCODING;
+	return DP_UNKNOWN_ENCODING;
+}
+
+enum dp_link_encoding mst_decide_link_encoding_format(const struct dc_link *link)
+{
+	struct dc_link_settings link_settings = {0};
+
+	if (!dc_is_dp_signal(link->connector_signal))
+		return DP_UNKNOWN_ENCODING;
+
+	if (link->preferred_link_setting.lane_count !=
+			LANE_COUNT_UNKNOWN &&
+			link->preferred_link_setting.link_rate !=
+					LINK_RATE_UNKNOWN) {
+		link_settings = link->preferred_link_setting;
+	} else {
+		decide_mst_link_settings(link, &link_settings);
+	}
+
+	return link_dp_get_encoding_format(&link_settings);
+}
+
+static void read_dp_device_vendor_id(struct dc_link *link)
+{
+	struct dp_device_vendor_id dp_id;
+
+	/* read IEEE branch device id */
+	core_link_read_dpcd(
+		link,
+		DP_BRANCH_OUI,
+		(uint8_t *)&dp_id,
+		sizeof(dp_id));
+
+	link->dpcd_caps.branch_dev_id =
+		(dp_id.ieee_oui[0] << 16) +
+		(dp_id.ieee_oui[1] << 8) +
+		dp_id.ieee_oui[2];
+
+	memmove(
+		link->dpcd_caps.branch_dev_name,
+		dp_id.ieee_device_id,
+		sizeof(dp_id.ieee_device_id));
+}
+
+static enum dc_status wake_up_aux_channel(struct dc_link *link)
+{
+	enum dc_status status = DC_ERROR_UNEXPECTED;
+	uint32_t aux_channel_retry_cnt = 0;
+	uint8_t dpcd_power_state = '\0';
+
+	while (status != DC_OK && aux_channel_retry_cnt < 10) {
+		status = core_link_read_dpcd(link, DP_SET_POWER,
+				&dpcd_power_state, sizeof(dpcd_power_state));
+
+		/* Delay 1 ms if AUX CH is in power down state. Based on spec
+		 * section 2.3.1.2, if AUX CH may be powered down due to
+		 * write to DPCD 600h = 2. Sink AUX CH is monitoring differential
+		 * signal and may need up to 1 ms before being able to reply.
+		 */
+		if (status != DC_OK || dpcd_power_state == DP_SET_POWER_D3) {
+			fsleep(1000);
+			aux_channel_retry_cnt++;
+		}
+	}
+
+	if (status != DC_OK) {
+		dpcd_power_state = DP_SET_POWER_D0;
+		status = core_link_write_dpcd(
+				link,
+				DP_SET_POWER,
+				&dpcd_power_state,
+				sizeof(dpcd_power_state));
+
+		dpcd_power_state = DP_SET_POWER_D3;
+		status = core_link_write_dpcd(
+				link,
+				DP_SET_POWER,
+				&dpcd_power_state,
+				sizeof(dpcd_power_state));
+		DC_LOG_DC("%s: Failed to power up sink\n", __func__);
+		return DC_ERROR_UNEXPECTED;
+	}
+
+	return DC_OK;
+}
+
+static void get_active_converter_info(
+	uint8_t data, struct dc_link *link)
+{
+	union dp_downstream_port_present ds_port = { .byte = data };
+	memset(&link->dpcd_caps.dongle_caps, 0, sizeof(link->dpcd_caps.dongle_caps));
+
+	/* decode converter info*/
+	if (!ds_port.fields.PORT_PRESENT) {
+		link->dpcd_caps.dongle_type = DISPLAY_DONGLE_NONE;
+		set_dongle_type(link->ddc,
+				link->dpcd_caps.dongle_type);
+		link->dpcd_caps.is_branch_dev = false;
+		return;
+	}
+
+	/* DPCD 0x5 bit 0 = 1, it indicate it's branch device */
+	link->dpcd_caps.is_branch_dev = ds_port.fields.PORT_PRESENT;
+
+	switch (ds_port.fields.PORT_TYPE) {
+	case DOWNSTREAM_VGA:
+		link->dpcd_caps.dongle_type = DISPLAY_DONGLE_DP_VGA_CONVERTER;
+		break;
+	case DOWNSTREAM_DVI_HDMI_DP_PLUS_PLUS:
+		/* At this point we don't know is it DVI or HDMI or DP++,
+		 * assume DVI.*/
+		link->dpcd_caps.dongle_type = DISPLAY_DONGLE_DP_DVI_CONVERTER;
+		break;
+	default:
+		link->dpcd_caps.dongle_type = DISPLAY_DONGLE_NONE;
+		break;
+	}
+
+	if (link->dpcd_caps.dpcd_rev.raw >= DPCD_REV_11) {
+		uint8_t det_caps[16]; /* CTS 4.2.2.7 expects source to read Detailed Capabilities Info : 00080h-0008F.*/
+		union dwnstream_port_caps_byte0 *port_caps =
+			(union dwnstream_port_caps_byte0 *)det_caps;
+		if (core_link_read_dpcd(link, DP_DOWNSTREAM_PORT_0,
+				det_caps, sizeof(det_caps)) == DC_OK) {
+
+			switch (port_caps->bits.DWN_STRM_PORTX_TYPE) {
+			/*Handle DP case as DONGLE_NONE*/
+			case DOWN_STREAM_DETAILED_DP:
+				link->dpcd_caps.dongle_type = DISPLAY_DONGLE_NONE;
+				break;
+			case DOWN_STREAM_DETAILED_VGA:
+				link->dpcd_caps.dongle_type =
+					DISPLAY_DONGLE_DP_VGA_CONVERTER;
+				break;
+			case DOWN_STREAM_DETAILED_DVI:
+				link->dpcd_caps.dongle_type =
+					DISPLAY_DONGLE_DP_DVI_CONVERTER;
+				break;
+			case DOWN_STREAM_DETAILED_HDMI:
+			case DOWN_STREAM_DETAILED_DP_PLUS_PLUS:
+				/*Handle DP++ active converter case, process DP++ case as HDMI case according DP1.4 spec*/
+				link->dpcd_caps.dongle_type =
+					DISPLAY_DONGLE_DP_HDMI_CONVERTER;
+
+				link->dpcd_caps.dongle_caps.dongle_type = link->dpcd_caps.dongle_type;
+				if (ds_port.fields.DETAILED_CAPS) {
+
+					union dwnstream_port_caps_byte3_hdmi
+						hdmi_caps = {.raw = det_caps[3] };
+					union dwnstream_port_caps_byte2
+						hdmi_color_caps = {.raw = det_caps[2] };
+					link->dpcd_caps.dongle_caps.dp_hdmi_max_pixel_clk_in_khz =
+						det_caps[1] * 2500;
+
+					link->dpcd_caps.dongle_caps.is_dp_hdmi_s3d_converter =
+						hdmi_caps.bits.FRAME_SEQ_TO_FRAME_PACK;
+					/*YCBCR capability only for HDMI case*/
+					if (port_caps->bits.DWN_STRM_PORTX_TYPE
+							== DOWN_STREAM_DETAILED_HDMI) {
+						link->dpcd_caps.dongle_caps.is_dp_hdmi_ycbcr422_pass_through =
+								hdmi_caps.bits.YCrCr422_PASS_THROUGH;
+						link->dpcd_caps.dongle_caps.is_dp_hdmi_ycbcr420_pass_through =
+								hdmi_caps.bits.YCrCr420_PASS_THROUGH;
+						link->dpcd_caps.dongle_caps.is_dp_hdmi_ycbcr422_converter =
+								hdmi_caps.bits.YCrCr422_CONVERSION;
+						link->dpcd_caps.dongle_caps.is_dp_hdmi_ycbcr420_converter =
+								hdmi_caps.bits.YCrCr420_CONVERSION;
+					}
+
+					link->dpcd_caps.dongle_caps.dp_hdmi_max_bpc =
+						translate_dpcd_max_bpc(
+							hdmi_color_caps.bits.MAX_BITS_PER_COLOR_COMPONENT);
+
+					if (link->dc->caps.dp_hdmi21_pcon_support) {
+						union hdmi_encoded_link_bw hdmi_encoded_link_bw;
+
+						link->dpcd_caps.dongle_caps.dp_hdmi_frl_max_link_bw_in_kbps =
+								link_bw_kbps_from_raw_frl_link_rate_data(
+										hdmi_color_caps.bits.MAX_ENCODED_LINK_BW_SUPPORT);
+
+						// Intersect reported max link bw support with the supported link rate post FRL link training
+						if (core_link_read_dpcd(link, DP_PCON_HDMI_POST_FRL_STATUS,
+								&hdmi_encoded_link_bw.raw, sizeof(hdmi_encoded_link_bw)) == DC_OK) {
+							link->dpcd_caps.dongle_caps.dp_hdmi_frl_max_link_bw_in_kbps = intersect_frl_link_bw_support(
+									link->dpcd_caps.dongle_caps.dp_hdmi_frl_max_link_bw_in_kbps,
+									hdmi_encoded_link_bw);
+						}
+
+						if (link->dpcd_caps.dongle_caps.dp_hdmi_frl_max_link_bw_in_kbps > 0)
+							link->dpcd_caps.dongle_caps.extendedCapValid = true;
+					}
+
+					if (link->dpcd_caps.dongle_caps.dp_hdmi_max_pixel_clk_in_khz != 0)
+						link->dpcd_caps.dongle_caps.extendedCapValid = true;
+				}
+
+				break;
+			}
+		}
+	}
+
+	set_dongle_type(link->ddc, link->dpcd_caps.dongle_type);
+
+	{
+		struct dp_sink_hw_fw_revision dp_hw_fw_revision;
+
+		core_link_read_dpcd(
+			link,
+			DP_BRANCH_REVISION_START,
+			(uint8_t *)&dp_hw_fw_revision,
+			sizeof(dp_hw_fw_revision));
+
+		link->dpcd_caps.branch_hw_revision =
+			dp_hw_fw_revision.ieee_hw_rev;
+
+		memmove(
+			link->dpcd_caps.branch_fw_revision,
+			dp_hw_fw_revision.ieee_fw_rev,
+			sizeof(dp_hw_fw_revision.ieee_fw_rev));
+	}
+	if (link->dpcd_caps.dpcd_rev.raw >= DPCD_REV_14 &&
+			link->dpcd_caps.dongle_type != DISPLAY_DONGLE_NONE) {
+		union dp_dfp_cap_ext dfp_cap_ext;
+		memset(&dfp_cap_ext, '\0', sizeof (dfp_cap_ext));
+		core_link_read_dpcd(
+				link,
+				DP_DFP_CAPABILITY_EXTENSION_SUPPORT,
+				dfp_cap_ext.raw,
+				sizeof(dfp_cap_ext.raw));
+		link->dpcd_caps.dongle_caps.dfp_cap_ext.supported = dfp_cap_ext.fields.supported;
+		link->dpcd_caps.dongle_caps.dfp_cap_ext.max_pixel_rate_in_mps =
+				dfp_cap_ext.fields.max_pixel_rate_in_mps[0] +
+				(dfp_cap_ext.fields.max_pixel_rate_in_mps[1] << 8);
+		link->dpcd_caps.dongle_caps.dfp_cap_ext.max_video_h_active_width =
+				dfp_cap_ext.fields.max_video_h_active_width[0] +
+				(dfp_cap_ext.fields.max_video_h_active_width[1] << 8);
+		link->dpcd_caps.dongle_caps.dfp_cap_ext.max_video_v_active_height =
+				dfp_cap_ext.fields.max_video_v_active_height[0] +
+				(dfp_cap_ext.fields.max_video_v_active_height[1] << 8);
+		link->dpcd_caps.dongle_caps.dfp_cap_ext.encoding_format_caps =
+				dfp_cap_ext.fields.encoding_format_caps;
+		link->dpcd_caps.dongle_caps.dfp_cap_ext.rgb_color_depth_caps =
+				dfp_cap_ext.fields.rgb_color_depth_caps;
+		link->dpcd_caps.dongle_caps.dfp_cap_ext.ycbcr444_color_depth_caps =
+				dfp_cap_ext.fields.ycbcr444_color_depth_caps;
+		link->dpcd_caps.dongle_caps.dfp_cap_ext.ycbcr422_color_depth_caps =
+				dfp_cap_ext.fields.ycbcr422_color_depth_caps;
+		link->dpcd_caps.dongle_caps.dfp_cap_ext.ycbcr420_color_depth_caps =
+				dfp_cap_ext.fields.ycbcr420_color_depth_caps;
+		DC_LOG_DP2("DFP capability extension is read at link %d", link->link_index);
+		DC_LOG_DP2("\tdfp_cap_ext.supported = %s", link->dpcd_caps.dongle_caps.dfp_cap_ext.supported ? "true" : "false");
+		DC_LOG_DP2("\tdfp_cap_ext.max_pixel_rate_in_mps = %d", link->dpcd_caps.dongle_caps.dfp_cap_ext.max_pixel_rate_in_mps);
+		DC_LOG_DP2("\tdfp_cap_ext.max_video_h_active_width = %d", link->dpcd_caps.dongle_caps.dfp_cap_ext.max_video_h_active_width);
+		DC_LOG_DP2("\tdfp_cap_ext.max_video_v_active_height = %d", link->dpcd_caps.dongle_caps.dfp_cap_ext.max_video_v_active_height);
+	}
+}
+
+static void apply_usbc_combo_phy_reset_wa(struct dc_link *link,
+		struct dc_link_settings *link_settings)
+{
+	/* Temporary Renoir-specific workaround PHY will sometimes be in bad
+	 * state on hotplugging display from certain USB-C dongle, so add extra
+	 * cycle of enabling and disabling the PHY before first link training.
+	 */
+	struct link_resource link_res = {0};
+	enum clock_source_id dp_cs_id = get_clock_source_id(link);
+
+	dp_enable_link_phy(link, &link_res, link->connector_signal,
+			dp_cs_id, link_settings);
+	dp_disable_link_phy(link, &link_res, link->connector_signal);
+}
+
+bool dp_overwrite_extended_receiver_cap(struct dc_link *link)
+{
+	uint8_t dpcd_data[16];
+	uint32_t read_dpcd_retry_cnt = 3;
+	enum dc_status status = DC_ERROR_UNEXPECTED;
+	union dp_downstream_port_present ds_port = { 0 };
+	union down_stream_port_count down_strm_port_count;
+	union edp_configuration_cap edp_config_cap;
+
+	int i;
+
+	for (i = 0; i < read_dpcd_retry_cnt; i++) {
+		status = core_link_read_dpcd(
+				link,
+				DP_DPCD_REV,
+				dpcd_data,
+				sizeof(dpcd_data));
+		if (status == DC_OK)
+			break;
+	}
+
+	link->dpcd_caps.dpcd_rev.raw =
+		dpcd_data[DP_DPCD_REV - DP_DPCD_REV];
+
+	if (dpcd_data[DP_MAX_LANE_COUNT - DP_DPCD_REV] == 0)
+		return false;
+
+	ds_port.byte = dpcd_data[DP_DOWNSTREAMPORT_PRESENT -
+			DP_DPCD_REV];
+
+	get_active_converter_info(ds_port.byte, link);
+
+	down_strm_port_count.raw = dpcd_data[DP_DOWN_STREAM_PORT_COUNT -
+			DP_DPCD_REV];
+
+	link->dpcd_caps.allow_invalid_MSA_timing_param =
+		down_strm_port_count.bits.IGNORE_MSA_TIMING_PARAM;
+
+	link->dpcd_caps.max_ln_count.raw = dpcd_data[
+		DP_MAX_LANE_COUNT - DP_DPCD_REV];
+
+	link->dpcd_caps.max_down_spread.raw = dpcd_data[
+		DP_MAX_DOWNSPREAD - DP_DPCD_REV];
+
+	link->reported_link_cap.lane_count =
+		link->dpcd_caps.max_ln_count.bits.MAX_LANE_COUNT;
+	link->reported_link_cap.link_rate = dpcd_data[
+		DP_MAX_LINK_RATE - DP_DPCD_REV];
+	link->reported_link_cap.link_spread =
+		link->dpcd_caps.max_down_spread.bits.MAX_DOWN_SPREAD ?
+		LINK_SPREAD_05_DOWNSPREAD_30KHZ : LINK_SPREAD_DISABLED;
+
+	edp_config_cap.raw = dpcd_data[
+		DP_EDP_CONFIGURATION_CAP - DP_DPCD_REV];
+	link->dpcd_caps.panel_mode_edp =
+		edp_config_cap.bits.ALT_SCRAMBLER_RESET;
+	link->dpcd_caps.dpcd_display_control_capable =
+		edp_config_cap.bits.DPCD_DISPLAY_CONTROL_CAPABLE;
+
+	return true;
+}
+
+void dpcd_set_source_specific_data(struct dc_link *link)
+{
+	if (!link->dc->vendor_signature.is_valid) {
+		enum dc_status __maybe_unused result_write_min_hblank = DC_NOT_SUPPORTED;
+		struct dpcd_amd_signature amd_signature = {0};
+		struct dpcd_amd_device_id amd_device_id = {0};
+
+		amd_device_id.device_id_byte1 =
+				(uint8_t)(link->ctx->asic_id.chip_id);
+		amd_device_id.device_id_byte2 =
+				(uint8_t)(link->ctx->asic_id.chip_id >> 8);
+		amd_device_id.dce_version =
+				(uint8_t)(link->ctx->dce_version);
+		amd_device_id.dal_version_byte1 = 0x0; // needed? where to get?
+		amd_device_id.dal_version_byte2 = 0x0; // needed? where to get?
+
+		core_link_read_dpcd(link, DP_SOURCE_OUI,
+				(uint8_t *)(&amd_signature),
+				sizeof(amd_signature));
+
+		if (!((amd_signature.AMD_IEEE_TxSignature_byte1 == 0x0) &&
+			(amd_signature.AMD_IEEE_TxSignature_byte2 == 0x0) &&
+			(amd_signature.AMD_IEEE_TxSignature_byte3 == 0x1A))) {
+
+			amd_signature.AMD_IEEE_TxSignature_byte1 = 0x0;
+			amd_signature.AMD_IEEE_TxSignature_byte2 = 0x0;
+			amd_signature.AMD_IEEE_TxSignature_byte3 = 0x1A;
+
+			core_link_write_dpcd(link, DP_SOURCE_OUI,
+				(uint8_t *)(&amd_signature),
+				sizeof(amd_signature));
+		}
+
+		core_link_write_dpcd(link, DP_SOURCE_OUI+0x03,
+				(uint8_t *)(&amd_device_id),
+				sizeof(amd_device_id));
+
+		if (link->ctx->dce_version >= DCN_VERSION_2_0 &&
+			link->dc->caps.min_horizontal_blanking_period != 0) {
+
+			uint8_t hblank_size = (uint8_t)link->dc->caps.min_horizontal_blanking_period;
+
+			result_write_min_hblank = core_link_write_dpcd(link,
+				DP_SOURCE_MINIMUM_HBLANK_SUPPORTED, (uint8_t *)(&hblank_size),
+				sizeof(hblank_size));
+		}
+		DC_TRACE_LEVEL_MESSAGE(DAL_TRACE_LEVEL_INFORMATION,
+							WPP_BIT_FLAG_DC_DETECTION_DP_CAPS,
+							"result=%u link_index=%u enum dce_version=%d DPCD=0x%04X min_hblank=%u branch_dev_id=0x%x branch_dev_name='%c%c%c%c%c%c'",
+							result_write_min_hblank,
+							link->link_index,
+							link->ctx->dce_version,
+							DP_SOURCE_MINIMUM_HBLANK_SUPPORTED,
+							link->dc->caps.min_horizontal_blanking_period,
+							link->dpcd_caps.branch_dev_id,
+							link->dpcd_caps.branch_dev_name[0],
+							link->dpcd_caps.branch_dev_name[1],
+							link->dpcd_caps.branch_dev_name[2],
+							link->dpcd_caps.branch_dev_name[3],
+							link->dpcd_caps.branch_dev_name[4],
+							link->dpcd_caps.branch_dev_name[5]);
+	} else {
+		core_link_write_dpcd(link, DP_SOURCE_OUI,
+				link->dc->vendor_signature.data.raw,
+				sizeof(link->dc->vendor_signature.data.raw));
+	}
+}
+
+void dpcd_write_cable_id_to_dprx(struct dc_link *link)
+{
+	if (!link->dpcd_caps.channel_coding_cap.bits.DP_128b_132b_SUPPORTED ||
+			link->dpcd_caps.cable_id.raw == 0 ||
+			link->dprx_states.cable_id_written)
+		return;
+
+	core_link_write_dpcd(link, DP_CABLE_ATTRIBUTES_UPDATED_BY_DPTX,
+			&link->dpcd_caps.cable_id.raw,
+			sizeof(link->dpcd_caps.cable_id.raw));
+
+	link->dprx_states.cable_id_written = 1;
+}
+
+static bool get_usbc_cable_id(struct dc_link *link, union dp_cable_id *cable_id)
+{
+	union dmub_rb_cmd cmd;
+
+	if (!link->ctx->dmub_srv ||
+			link->ep_type != DISPLAY_ENDPOINT_PHY ||
+			link->link_enc->features.flags.bits.DP_IS_USB_C == 0)
+		return false;
+
+	memset(&cmd, 0, sizeof(cmd));
+	cmd.cable_id.header.type = DMUB_CMD_GET_USBC_CABLE_ID;
+	cmd.cable_id.header.payload_bytes = sizeof(cmd.cable_id.data);
+	cmd.cable_id.data.input.phy_inst = resource_transmitter_to_phy_idx(
+			link->dc, link->link_enc->transmitter);
+	if (dm_execute_dmub_cmd(link->dc->ctx, &cmd, DM_DMUB_WAIT_TYPE_WAIT_WITH_REPLY) &&
+			cmd.cable_id.header.ret_status == 1) {
+		cable_id->raw = cmd.cable_id.data.output_raw;
+		DC_LOG_DC("usbc_cable_id = %d.\n", cable_id->raw);
+	}
+	return cmd.cable_id.header.ret_status == 1;
+}
+
+static void retrieve_cable_id(struct dc_link *link)
+{
+	union dp_cable_id usbc_cable_id;
+
+	link->dpcd_caps.cable_id.raw = 0;
+	core_link_read_dpcd(link, DP_CABLE_ATTRIBUTES_UPDATED_BY_DPRX,
+			&link->dpcd_caps.cable_id.raw, sizeof(uint8_t));
+
+	if (get_usbc_cable_id(link, &usbc_cable_id))
+		link->dpcd_caps.cable_id = intersect_cable_id(
+				&link->dpcd_caps.cable_id, &usbc_cable_id);
+}
+
+bool read_is_mst_supported(struct dc_link *link)
+{
+	bool mst          = false;
+	enum dc_status st = DC_OK;
+	union dpcd_rev rev;
+	union mstm_cap cap;
+
+	if (link->preferred_training_settings.mst_enable &&
+		*link->preferred_training_settings.mst_enable == false) {
+		return false;
+	}
+
+	rev.raw  = 0;
+	cap.raw  = 0;
+
+	st = core_link_read_dpcd(link, DP_DPCD_REV, &rev.raw,
+			sizeof(rev));
+
+	if (st == DC_OK && rev.raw >= DPCD_REV_12) {
+
+		st = core_link_read_dpcd(link, DP_MSTM_CAP,
+				&cap.raw, sizeof(cap));
+		if (st == DC_OK && cap.bits.MST_CAP == 1)
+			mst = true;
+	}
+	return mst;
+
+}
+
+/* Read additional sink caps defined in source specific DPCD area
+ * This function currently only reads from SinkCapability address (DP_SOURCE_SINK_CAP)
+ * TODO: Add FS caps and read from DP_SOURCE_SINK_FS_CAP as well
+ */
+static bool dpcd_read_sink_ext_caps(struct dc_link *link)
+{
+	uint8_t dpcd_data = 0;
+	uint8_t edp_general_cap2 = 0;
+
+	if (!link)
+		return false;
+
+	if (core_link_read_dpcd(link, DP_SOURCE_SINK_CAP, &dpcd_data, 1) != DC_OK)
+		return false;
+
+	link->dpcd_sink_ext_caps.raw = dpcd_data;
+
+	if (core_link_read_dpcd(link, DP_EDP_GENERAL_CAP_2, &edp_general_cap2, 1) != DC_OK)
+		return false;
+
+	link->dpcd_caps.panel_luminance_control = (edp_general_cap2 & DP_EDP_PANEL_LUMINANCE_CONTROL_CAPABLE) != 0;
+
+	return true;
+}
+
+enum dc_status dp_retrieve_lttpr_cap(struct dc_link *link)
+{
+	uint8_t lttpr_dpcd_data[8];
+	enum dc_status status;
+	bool is_lttpr_present;
+
+	/* Logic to determine LTTPR support*/
+	bool vbios_lttpr_interop = link->dc->caps.vbios_lttpr_aware;
+
+	if (!vbios_lttpr_interop || !link->dc->caps.extended_aux_timeout_support)
+		return DC_NOT_SUPPORTED;
+
+	/* By reading LTTPR capability, RX assumes that we will enable
+	 * LTTPR extended aux timeout if LTTPR is present.
+	 */
+	status = core_link_read_dpcd(
+			link,
+			DP_LT_TUNABLE_PHY_REPEATER_FIELD_DATA_STRUCTURE_REV,
+			lttpr_dpcd_data,
+			sizeof(lttpr_dpcd_data));
+
+	link->dpcd_caps.lttpr_caps.revision.raw =
+			lttpr_dpcd_data[DP_LT_TUNABLE_PHY_REPEATER_FIELD_DATA_STRUCTURE_REV -
+							DP_LT_TUNABLE_PHY_REPEATER_FIELD_DATA_STRUCTURE_REV];
+
+	link->dpcd_caps.lttpr_caps.max_link_rate =
+			lttpr_dpcd_data[DP_MAX_LINK_RATE_PHY_REPEATER -
+							DP_LT_TUNABLE_PHY_REPEATER_FIELD_DATA_STRUCTURE_REV];
+
+	link->dpcd_caps.lttpr_caps.phy_repeater_cnt =
+			lttpr_dpcd_data[DP_PHY_REPEATER_CNT -
+							DP_LT_TUNABLE_PHY_REPEATER_FIELD_DATA_STRUCTURE_REV];
+
+	link->dpcd_caps.lttpr_caps.max_lane_count =
+			lttpr_dpcd_data[DP_MAX_LANE_COUNT_PHY_REPEATER -
+							DP_LT_TUNABLE_PHY_REPEATER_FIELD_DATA_STRUCTURE_REV];
+
+	link->dpcd_caps.lttpr_caps.mode =
+			lttpr_dpcd_data[DP_PHY_REPEATER_MODE -
+							DP_LT_TUNABLE_PHY_REPEATER_FIELD_DATA_STRUCTURE_REV];
+
+	link->dpcd_caps.lttpr_caps.max_ext_timeout =
+			lttpr_dpcd_data[DP_PHY_REPEATER_EXTENDED_WAIT_TIMEOUT -
+							DP_LT_TUNABLE_PHY_REPEATER_FIELD_DATA_STRUCTURE_REV];
+	link->dpcd_caps.lttpr_caps.main_link_channel_coding.raw =
+			lttpr_dpcd_data[DP_MAIN_LINK_CHANNEL_CODING_PHY_REPEATER -
+							DP_LT_TUNABLE_PHY_REPEATER_FIELD_DATA_STRUCTURE_REV];
+
+	link->dpcd_caps.lttpr_caps.supported_128b_132b_rates.raw =
+			lttpr_dpcd_data[DP_PHY_REPEATER_128B132B_RATES -
+							DP_LT_TUNABLE_PHY_REPEATER_FIELD_DATA_STRUCTURE_REV];
+
+	/* If this chip cap is set, at least one retimer must exist in the chain
+	 * Override count to 1 if we receive a known bad count (0 or an invalid value) */
+	if ((link->chip_caps & EXT_DISPLAY_PATH_CAPS__DP_FIXED_VS_EN) &&
+			(dp_parse_lttpr_repeater_count(link->dpcd_caps.lttpr_caps.phy_repeater_cnt) == 0)) {
+		ASSERT(0);
+		link->dpcd_caps.lttpr_caps.phy_repeater_cnt = 0x80;
+		DC_LOG_DC("lttpr_caps forced phy_repeater_cnt = %d\n", link->dpcd_caps.lttpr_caps.phy_repeater_cnt);
+	}
+
+	/* Attempt to train in LTTPR transparent mode if repeater count exceeds 8. */
+	is_lttpr_present = dp_is_lttpr_present(link);
+
+	if (is_lttpr_present)
+		CONN_DATA_DETECT(link, lttpr_dpcd_data, sizeof(lttpr_dpcd_data), "LTTPR Caps: ");
+
+	DC_LOG_DC("is_lttpr_present = %d\n", is_lttpr_present);
+	return status;
+}
+
+static bool retrieve_link_cap(struct dc_link *link)
+{
+	/* DP_ADAPTER_CAP - DP_DPCD_REV + 1 == 16 and also DP_DSC_BITS_PER_PIXEL_INC - DP_DSC_SUPPORT + 1 == 16,
+	 * which means size 16 will be good for both of those DPCD register block reads
+	 */
+	uint8_t dpcd_data[16];
+	/*Only need to read 1 byte starting from DP_DPRX_FEATURE_ENUMERATION_LIST.
+	 */
+	uint8_t dpcd_dprx_data = '\0';
+
+	struct dp_device_vendor_id sink_id;
+	union down_stream_port_count down_strm_port_count;
+	union edp_configuration_cap edp_config_cap;
+	union dp_downstream_port_present ds_port = { 0 };
+	enum dc_status status = DC_ERROR_UNEXPECTED;
+	uint32_t read_dpcd_retry_cnt = 3;
+	int i;
+	struct dp_sink_hw_fw_revision dp_hw_fw_revision;
+	const uint32_t post_oui_delay = 30; // 30ms
+	bool is_fec_supported = false;
+	bool is_dsc_basic_supported = false;
+	bool is_dsc_passthrough_supported = false;
+
+	memset(dpcd_data, '\0', sizeof(dpcd_data));
+	memset(&down_strm_port_count,
+		'\0', sizeof(union down_stream_port_count));
+	memset(&edp_config_cap, '\0',
+		sizeof(union edp_configuration_cap));
+
+	/* if extended timeout is supported in hardware,
+	 * default to LTTPR timeout (3.2ms) first as a W/A for DP link layer
+	 * CTS 4.2.1.1 regression introduced by CTS specs requirement update.
+	 */
+	try_to_configure_aux_timeout(link->ddc,
+			LINK_AUX_DEFAULT_LTTPR_TIMEOUT_PERIOD);
+
+	status = dp_retrieve_lttpr_cap(link);
+
+	if (status != DC_OK) {
+		status = wake_up_aux_channel(link);
+		if (status == DC_OK)
+			dp_retrieve_lttpr_cap(link);
+		else
+			return false;
+	}
+
+	if (dp_is_lttpr_present(link))
+		configure_lttpr_mode_transparent(link);
+
+	/* Read DP tunneling information. */
+	status = dpcd_get_tunneling_device_data(link);
+
+	dpcd_set_source_specific_data(link);
+	/* Sink may need to configure internals based on vendor, so allow some
+	 * time before proceeding with possibly vendor specific transactions
+	 */
+	msleep(post_oui_delay);
+
+	for (i = 0; i < read_dpcd_retry_cnt; i++) {
+		status = core_link_read_dpcd(
+				link,
+				DP_DPCD_REV,
+				dpcd_data,
+				sizeof(dpcd_data));
+		if (status == DC_OK)
+			break;
+	}
+
+
+	if (status != DC_OK) {
+		dm_error("%s: Read receiver caps dpcd data failed.\n", __func__);
+		return false;
+	}
+
+	if (!dp_is_lttpr_present(link))
+		try_to_configure_aux_timeout(link->ddc, LINK_AUX_DEFAULT_TIMEOUT_PERIOD);
+
+
+	{
+		union training_aux_rd_interval aux_rd_interval;
+
+		aux_rd_interval.raw =
+			dpcd_data[DP_TRAINING_AUX_RD_INTERVAL];
+
+		link->dpcd_caps.ext_receiver_cap_field_present =
+				aux_rd_interval.bits.EXT_RECEIVER_CAP_FIELD_PRESENT == 1;
+
+		if (aux_rd_interval.bits.EXT_RECEIVER_CAP_FIELD_PRESENT == 1) {
+			uint8_t ext_cap_data[16];
+
+			memset(ext_cap_data, '\0', sizeof(ext_cap_data));
+			for (i = 0; i < read_dpcd_retry_cnt; i++) {
+				status = core_link_read_dpcd(
+				link,
+				DP_DP13_DPCD_REV,
+				ext_cap_data,
+				sizeof(ext_cap_data));
+				if (status == DC_OK) {
+					memcpy(dpcd_data, ext_cap_data, sizeof(dpcd_data));
+					break;
+				}
+			}
+			if (status != DC_OK)
+				dm_error("%s: Read extend caps data failed, use cap from dpcd 0.\n", __func__);
+		}
+	}
+
+	link->dpcd_caps.dpcd_rev.raw =
+			dpcd_data[DP_DPCD_REV - DP_DPCD_REV];
+
+	if (link->dpcd_caps.ext_receiver_cap_field_present) {
+		for (i = 0; i < read_dpcd_retry_cnt; i++) {
+			status = core_link_read_dpcd(
+					link,
+					DP_DPRX_FEATURE_ENUMERATION_LIST,
+					&dpcd_dprx_data,
+					sizeof(dpcd_dprx_data));
+			if (status == DC_OK)
+				break;
+		}
+
+		link->dpcd_caps.dprx_feature.raw = dpcd_dprx_data;
+
+		if (status != DC_OK)
+			dm_error("%s: Read DPRX caps data failed.\n", __func__);
+
+		/* AdaptiveSyncCapability  */
+		dpcd_dprx_data = 0;
+		for (i = 0; i < read_dpcd_retry_cnt; i++) {
+			status = core_link_read_dpcd(
+					link, DP_DPRX_FEATURE_ENUMERATION_LIST_CONT_1,
+					&dpcd_dprx_data, sizeof(dpcd_dprx_data));
+			if (status == DC_OK)
+				break;
+		}
+
+		link->dpcd_caps.adaptive_sync_caps.dp_adap_sync_caps.raw = dpcd_dprx_data;
+
+		if (status != DC_OK)
+			dm_error("%s: Read DPRX caps data failed. Addr:%#x\n",
+					__func__, DP_DPRX_FEATURE_ENUMERATION_LIST_CONT_1);
+	}
+
+	else {
+		link->dpcd_caps.dprx_feature.raw = 0;
+	}
+
+
+	/* Error condition checking...
+	 * It is impossible for Sink to report Max Lane Count = 0.
+	 * It is possible for Sink to report Max Link Rate = 0, if it is
+	 * an eDP device that is reporting specialized link rates in the
+	 * SUPPORTED_LINK_RATE table.
+	 */
+	if (dpcd_data[DP_MAX_LANE_COUNT - DP_DPCD_REV] == 0)
+		return false;
+
+	ds_port.byte = dpcd_data[DP_DOWNSTREAMPORT_PRESENT -
+				 DP_DPCD_REV];
+
+	read_dp_device_vendor_id(link);
+
+	/* TODO - decouple raw mst capability from policy decision */
+	link->dpcd_caps.is_mst_capable = read_is_mst_supported(link);
+	DC_LOG_DC("%s: MST_Support: %s\n", __func__, str_yes_no(link->dpcd_caps.is_mst_capable));
+
+	get_active_converter_info(ds_port.byte, link);
+
+	dp_wa_power_up_0010FA(link, dpcd_data, sizeof(dpcd_data));
+
+	down_strm_port_count.raw = dpcd_data[DP_DOWN_STREAM_PORT_COUNT -
+				 DP_DPCD_REV];
+
+	link->dpcd_caps.allow_invalid_MSA_timing_param =
+		down_strm_port_count.bits.IGNORE_MSA_TIMING_PARAM;
+
+	link->dpcd_caps.max_ln_count.raw = dpcd_data[
+		DP_MAX_LANE_COUNT - DP_DPCD_REV];
+
+	link->dpcd_caps.max_down_spread.raw = dpcd_data[
+		DP_MAX_DOWNSPREAD - DP_DPCD_REV];
+
+	link->reported_link_cap.lane_count =
+		link->dpcd_caps.max_ln_count.bits.MAX_LANE_COUNT;
+	link->reported_link_cap.link_rate = get_link_rate_from_max_link_bw(
+			dpcd_data[DP_MAX_LINK_RATE - DP_DPCD_REV]);
+	link->reported_link_cap.link_spread =
+		link->dpcd_caps.max_down_spread.bits.MAX_DOWN_SPREAD ?
+		LINK_SPREAD_05_DOWNSPREAD_30KHZ : LINK_SPREAD_DISABLED;
+
+	edp_config_cap.raw = dpcd_data[
+		DP_EDP_CONFIGURATION_CAP - DP_DPCD_REV];
+	link->dpcd_caps.panel_mode_edp =
+		edp_config_cap.bits.ALT_SCRAMBLER_RESET;
+	link->dpcd_caps.dpcd_display_control_capable =
+		edp_config_cap.bits.DPCD_DISPLAY_CONTROL_CAPABLE;
+	link->dpcd_caps.channel_coding_cap.raw =
+			dpcd_data[DP_MAIN_LINK_CHANNEL_CODING - DP_DPCD_REV];
+	link->test_pattern_enabled = false;
+	link->compliance_test_state.raw = 0;
+
+	/* read sink count */
+	core_link_read_dpcd(link,
+			DP_SINK_COUNT,
+			&link->dpcd_caps.sink_count.raw,
+			sizeof(link->dpcd_caps.sink_count.raw));
+
+	/* read sink ieee oui */
+	core_link_read_dpcd(link,
+			DP_SINK_OUI,
+			(uint8_t *)(&sink_id),
+			sizeof(sink_id));
+
+	link->dpcd_caps.sink_dev_id =
+			(sink_id.ieee_oui[0] << 16) +
+			(sink_id.ieee_oui[1] << 8) +
+			(sink_id.ieee_oui[2]);
+
+	memmove(
+		link->dpcd_caps.sink_dev_id_str,
+		sink_id.ieee_device_id,
+		sizeof(sink_id.ieee_device_id));
+
+	core_link_read_dpcd(
+		link,
+		DP_SINK_HW_REVISION_START,
+		(uint8_t *)&dp_hw_fw_revision,
+		sizeof(dp_hw_fw_revision));
+
+	link->dpcd_caps.sink_hw_revision =
+		dp_hw_fw_revision.ieee_hw_rev;
+
+	memmove(
+		link->dpcd_caps.sink_fw_revision,
+		dp_hw_fw_revision.ieee_fw_rev,
+		sizeof(dp_hw_fw_revision.ieee_fw_rev));
+
+	/* Quirk for Retina panels: wrong DP_MAX_LINK_RATE */
+	{
+		uint8_t str_mbp_2018[] = { 101, 68, 21, 103, 98, 97 };
+		uint8_t fwrev_mbp_2018[] = { 7, 4 };
+		uint8_t fwrev_mbp_2018_vega[] = { 8, 4 };
+
+		/* We also check for the firmware revision as 16,1 models have an
+		 * identical device id and are incorrectly quirked otherwise.
+		 */
+		if ((link->dpcd_caps.sink_dev_id == 0x0010fa) &&
+		    !memcmp(link->dpcd_caps.sink_dev_id_str, str_mbp_2018,
+			     sizeof(str_mbp_2018)) &&
+		    (!memcmp(link->dpcd_caps.sink_fw_revision, fwrev_mbp_2018,
+			     sizeof(fwrev_mbp_2018)) ||
+		    !memcmp(link->dpcd_caps.sink_fw_revision, fwrev_mbp_2018_vega,
+			     sizeof(fwrev_mbp_2018_vega)))) {
+			link->reported_link_cap.link_rate = LINK_RATE_RBR2;
+		}
+	}
+
+	memset(&link->dpcd_caps.dsc_caps, '\0',
+			sizeof(link->dpcd_caps.dsc_caps));
+	memset(&link->dpcd_caps.fec_cap, '\0', sizeof(link->dpcd_caps.fec_cap));
+	/* Read DSC and FEC sink capabilities if DP revision is 1.4 and up */
+	if (link->dpcd_caps.dpcd_rev.raw >= DPCD_REV_14) {
+		status = core_link_read_dpcd(
+				link,
+				DP_FEC_CAPABILITY,
+				&link->dpcd_caps.fec_cap.raw,
+				sizeof(link->dpcd_caps.fec_cap.raw));
+		status = core_link_read_dpcd(
+				link,
+				DP_DSC_SUPPORT,
+				link->dpcd_caps.dsc_caps.dsc_basic_caps.raw,
+				sizeof(link->dpcd_caps.dsc_caps.dsc_basic_caps.raw));
+		if (status == DC_OK) {
+			is_fec_supported = link->dpcd_caps.fec_cap.bits.FEC_CAPABLE;
+			is_dsc_basic_supported = link->dpcd_caps.dsc_caps.dsc_basic_caps.fields.dsc_support.DSC_SUPPORT;
+			is_dsc_passthrough_supported = link->dpcd_caps.dsc_caps.dsc_basic_caps.fields.dsc_support.DSC_PASSTHROUGH_SUPPORT;
+			DC_LOG_DC("%s: FEC_Sink_Support: %s\n", __func__,
+				  str_yes_no(is_fec_supported));
+			DC_LOG_DC("%s: DSC_Basic_Sink_Support: %s\n", __func__,
+				  str_yes_no(is_dsc_basic_supported));
+			DC_LOG_DC("%s: DSC_Passthrough_Sink_Support: %s\n", __func__,
+				  str_yes_no(is_dsc_passthrough_supported));
+		}
+		if (link->dpcd_caps.dongle_type != DISPLAY_DONGLE_NONE) {
+			status = core_link_read_dpcd(
+					link,
+					DP_DSC_BRANCH_OVERALL_THROUGHPUT_0,
+					link->dpcd_caps.dsc_caps.dsc_branch_decoder_caps.raw,
+					sizeof(link->dpcd_caps.dsc_caps.dsc_branch_decoder_caps.raw));
+			DC_LOG_DSC("DSC branch decoder capability is read at link %d", link->link_index);
+			DC_LOG_DSC("\tBRANCH_OVERALL_THROUGHPUT_0 = 0x%02x",
+					link->dpcd_caps.dsc_caps.dsc_branch_decoder_caps.fields.BRANCH_OVERALL_THROUGHPUT_0);
+			DC_LOG_DSC("\tBRANCH_OVERALL_THROUGHPUT_1 = 0x%02x",
+					link->dpcd_caps.dsc_caps.dsc_branch_decoder_caps.fields.BRANCH_OVERALL_THROUGHPUT_1);
+			DC_LOG_DSC("\tBRANCH_MAX_LINE_WIDTH 0x%02x",
+					link->dpcd_caps.dsc_caps.dsc_branch_decoder_caps.fields.BRANCH_MAX_LINE_WIDTH);
+		}
+
+		/* Apply work around to disable FEC and DSC for USB4 tunneling in TBT3 compatibility mode
+		 * only if required.
+		 */
+		if (link->ep_type == DISPLAY_ENDPOINT_USB4_DPIA &&
+				link->dc->debug.dpia_debug.bits.enable_force_tbt3_work_around &&
+				link->dpcd_caps.is_branch_dev &&
+				link->dpcd_caps.branch_dev_id == DP_BRANCH_DEVICE_ID_90CC24 &&
+				link->dpcd_caps.branch_hw_revision == DP_BRANCH_HW_REV_10 &&
+				(link->dpcd_caps.fec_cap.bits.FEC_CAPABLE ||
+				link->dpcd_caps.dsc_caps.dsc_basic_caps.fields.dsc_support.DSC_SUPPORT)) {
+			/* A TBT3 device is expected to report no support for FEC or DSC to a USB4 DPIA.
+			 * Clear FEC and DSC capabilities as a work around if that is not the case.
+			 */
+			link->wa_flags.dpia_forced_tbt3_mode = true;
+			memset(&link->dpcd_caps.dsc_caps, '\0', sizeof(link->dpcd_caps.dsc_caps));
+			memset(&link->dpcd_caps.fec_cap, '\0', sizeof(link->dpcd_caps.fec_cap));
+			DC_LOG_DSC("Clear DSC SUPPORT for USB4 link(%d) in TBT3 compatibility mode", link->link_index);
+		} else
+			link->wa_flags.dpia_forced_tbt3_mode = false;
+	}
+
+	if (!dpcd_read_sink_ext_caps(link))
+		link->dpcd_sink_ext_caps.raw = 0;
+
+	if (link->dpcd_caps.channel_coding_cap.bits.DP_128b_132b_SUPPORTED) {
+		DC_LOG_DP2("128b/132b encoding is supported at link %d", link->link_index);
+
+		core_link_read_dpcd(link,
+				DP_128B132B_SUPPORTED_LINK_RATES,
+				&link->dpcd_caps.dp_128b_132b_supported_link_rates.raw,
+				sizeof(link->dpcd_caps.dp_128b_132b_supported_link_rates.raw));
+		if (link->dpcd_caps.dp_128b_132b_supported_link_rates.bits.UHBR20)
+			link->reported_link_cap.link_rate = LINK_RATE_UHBR20;
+		else if (link->dpcd_caps.dp_128b_132b_supported_link_rates.bits.UHBR13_5)
+			link->reported_link_cap.link_rate = LINK_RATE_UHBR13_5;
+		else if (link->dpcd_caps.dp_128b_132b_supported_link_rates.bits.UHBR10)
+			link->reported_link_cap.link_rate = LINK_RATE_UHBR10;
+		else
+			dm_error("%s: Invalid RX 128b_132b_supported_link_rates\n", __func__);
+		DC_LOG_DP2("128b/132b supported link rates is read at link %d", link->link_index);
+		DC_LOG_DP2("\tmax 128b/132b link rate support is %d.%d GHz",
+				link->reported_link_cap.link_rate / 100,
+				link->reported_link_cap.link_rate % 100);
+
+		core_link_read_dpcd(link,
+				DP_SINK_VIDEO_FALLBACK_FORMATS,
+				&link->dpcd_caps.fallback_formats.raw,
+				sizeof(link->dpcd_caps.fallback_formats.raw));
+		DC_LOG_DP2("sink video fallback format is read at link %d", link->link_index);
+		if (link->dpcd_caps.fallback_formats.bits.dp_1920x1080_60Hz_24bpp_support)
+			DC_LOG_DP2("\t1920x1080@60Hz 24bpp fallback format supported");
+		if (link->dpcd_caps.fallback_formats.bits.dp_1280x720_60Hz_24bpp_support)
+			DC_LOG_DP2("\t1280x720@60Hz 24bpp fallback format supported");
+		if (link->dpcd_caps.fallback_formats.bits.dp_1024x768_60Hz_24bpp_support)
+			DC_LOG_DP2("\t1024x768@60Hz 24bpp fallback format supported");
+		if (link->dpcd_caps.fallback_formats.raw == 0) {
+			DC_LOG_DP2("\tno supported fallback formats, assume 1920x1080@60Hz 24bpp is supported");
+			link->dpcd_caps.fallback_formats.bits.dp_1920x1080_60Hz_24bpp_support = 1;
+		}
+
+		core_link_read_dpcd(link,
+				DP_FEC_CAPABILITY_1,
+				&link->dpcd_caps.fec_cap1.raw,
+				sizeof(link->dpcd_caps.fec_cap1.raw));
+		DC_LOG_DP2("FEC CAPABILITY 1 is read at link %d", link->link_index);
+		if (link->dpcd_caps.fec_cap1.bits.AGGREGATED_ERROR_COUNTERS_CAPABLE)
+			DC_LOG_DP2("\tFEC aggregated error counters are supported");
+	}
+
+	retrieve_cable_id(link);
+	dpcd_write_cable_id_to_dprx(link);
+
+	/* Connectivity log: detection */
+	CONN_DATA_DETECT(link, dpcd_data, sizeof(dpcd_data), "Rx Caps: ");
+
+	return true;
+}
+
+bool detect_dp_sink_caps(struct dc_link *link)
+{
+	return retrieve_link_cap(link);
+}
+
+void detect_edp_sink_caps(struct dc_link *link)
+{
+	uint8_t supported_link_rates[16];
+	uint32_t entry;
+	uint32_t link_rate_in_khz;
+	enum dc_link_rate link_rate = LINK_RATE_UNKNOWN;
+	uint8_t backlight_adj_cap;
+	uint8_t general_edp_cap;
+
+	retrieve_link_cap(link);
+	link->dpcd_caps.edp_supported_link_rates_count = 0;
+	memset(supported_link_rates, 0, sizeof(supported_link_rates));
+
+	/*
+	 * edp_supported_link_rates_count is only valid for eDP v1.4 or higher.
+	 * Per VESA eDP spec, "The DPCD revision for eDP v1.4 is 13h"
+	 */
+	if (link->dpcd_caps.dpcd_rev.raw >= DPCD_REV_13) {
+		// Read DPCD 00010h - 0001Fh 16 bytes at one shot
+		core_link_read_dpcd(link, DP_SUPPORTED_LINK_RATES,
+							supported_link_rates, sizeof(supported_link_rates));
+
+		for (entry = 0; entry < 16; entry += 2) {
+			// DPCD register reports per-lane link rate = 16-bit link rate capability
+			// value X 200 kHz. Need multiplier to find link rate in kHz.
+			link_rate_in_khz = (supported_link_rates[entry+1] * 0x100 +
+										supported_link_rates[entry]) * 200;
+
+			DC_LOG_DC("%s: eDP v1.4 supported sink rates: [%d] %d kHz\n", __func__,
+				  entry / 2, link_rate_in_khz);
+
+			if (link_rate_in_khz != 0) {
+				link_rate = linkRateInKHzToLinkRateMultiplier(link_rate_in_khz);
+				link->dpcd_caps.edp_supported_link_rates[link->dpcd_caps.edp_supported_link_rates_count] = link_rate;
+				link->dpcd_caps.edp_supported_link_rates_count++;
+			}
+		}
+	}
+
+	core_link_read_dpcd(link, DP_EDP_BACKLIGHT_ADJUSTMENT_CAP,
+						&backlight_adj_cap, sizeof(backlight_adj_cap));
+
+	link->dpcd_caps.dynamic_backlight_capable_edp =
+				(backlight_adj_cap & DP_EDP_DYNAMIC_BACKLIGHT_CAP) ? true:false;
+
+	core_link_read_dpcd(link, DP_EDP_GENERAL_CAP_1,
+						&general_edp_cap, sizeof(general_edp_cap));
+
+	link->dpcd_caps.set_power_state_capable_edp =
+				(general_edp_cap & DP_EDP_SET_POWER_CAP) ? true:false;
+
+	set_default_brightness_aux(link);
+
+	core_link_read_dpcd(link, DP_EDP_DPCD_REV,
+		&link->dpcd_caps.edp_rev,
+		sizeof(link->dpcd_caps.edp_rev));
+	/*
+	 * PSR is only valid for eDP v1.3 or higher.
+	 */
+	if (link->dpcd_caps.edp_rev >= DP_EDP_13) {
+		core_link_read_dpcd(link, DP_PSR_SUPPORT,
+			&link->dpcd_caps.psr_info.psr_version,
+			sizeof(link->dpcd_caps.psr_info.psr_version));
+		if (link->dpcd_caps.sink_dev_id == DP_BRANCH_DEVICE_ID_001CF8)
+			core_link_read_dpcd(link, DP_FORCE_PSRSU_CAPABILITY,
+						&link->dpcd_caps.psr_info.force_psrsu_cap,
+						sizeof(link->dpcd_caps.psr_info.force_psrsu_cap));
+		core_link_read_dpcd(link, DP_PSR_CAPS,
+			&link->dpcd_caps.psr_info.psr_dpcd_caps.raw,
+			sizeof(link->dpcd_caps.psr_info.psr_dpcd_caps.raw));
+		if (link->dpcd_caps.psr_info.psr_dpcd_caps.bits.Y_COORDINATE_REQUIRED) {
+			core_link_read_dpcd(link, DP_PSR2_SU_Y_GRANULARITY,
+				&link->dpcd_caps.psr_info.psr2_su_y_granularity_cap,
+				sizeof(link->dpcd_caps.psr_info.psr2_su_y_granularity_cap));
+		}
+	}
+
+	/*
+	 * ALPM is only valid for eDP v1.4 or higher.
+	 */
+	if (link->dpcd_caps.dpcd_rev.raw >= DP_EDP_14)
+		core_link_read_dpcd(link, DP_RECEIVER_ALPM_CAP,
+			&link->dpcd_caps.alpm_caps.raw,
+			sizeof(link->dpcd_caps.alpm_caps.raw));
+
+	/*
+	 * Read REPLAY info
+	 */
+	core_link_read_dpcd(link, DP_SINK_PR_PIXEL_DEVIATION_PER_LINE,
+			&link->dpcd_caps.pr_info.pixel_deviation_per_line,
+			sizeof(link->dpcd_caps.pr_info.pixel_deviation_per_line));
+	core_link_read_dpcd(link, DP_SINK_PR_MAX_NUMBER_OF_DEVIATION_LINE,
+			&link->dpcd_caps.pr_info.max_deviation_line,
+			sizeof(link->dpcd_caps.pr_info.max_deviation_line));
+}
+
+bool dp_get_max_link_enc_cap(const struct dc_link *link, struct dc_link_settings *max_link_enc_cap)
+{
+	struct link_encoder *link_enc = NULL;
+
+	if (!max_link_enc_cap) {
+		DC_LOG_ERROR("%s: Could not return max link encoder caps", __func__);
+		return false;
+	}
+
+	link_enc = link_enc_cfg_get_link_enc(link);
+	ASSERT(link_enc);
+
+	if (link_enc && link_enc->funcs->get_max_link_cap) {
+		link_enc->funcs->get_max_link_cap(link_enc, max_link_enc_cap);
+		return true;
+	}
+
+	DC_LOG_ERROR("%s: Max link encoder caps unknown", __func__);
+	max_link_enc_cap->lane_count = 1;
+	max_link_enc_cap->link_rate = 6;
+	return false;
+}
+
+const struct dc_link_settings *dp_get_verified_link_cap(
+		const struct dc_link *link)
+{
+	if (link->preferred_link_setting.lane_count != LANE_COUNT_UNKNOWN &&
+			link->preferred_link_setting.link_rate != LINK_RATE_UNKNOWN)
+		return &link->preferred_link_setting;
+	return &link->verified_link_cap;
+}
+
+struct dc_link_settings dp_get_max_link_cap(struct dc_link *link)
+{
+	struct dc_link_settings max_link_cap = {0};
+	enum dc_link_rate lttpr_max_link_rate;
+	enum dc_link_rate cable_max_link_rate;
+	struct link_encoder *link_enc = NULL;
+
+
+	link_enc = link_enc_cfg_get_link_enc(link);
+	ASSERT(link_enc);
+
+	/* get max link encoder capability */
+	if (link_enc)
+		link_enc->funcs->get_max_link_cap(link_enc, &max_link_cap);
+
+	/* Lower link settings based on sink's link cap */
+	if (link->reported_link_cap.lane_count < max_link_cap.lane_count)
+		max_link_cap.lane_count =
+				link->reported_link_cap.lane_count;
+	if (link->reported_link_cap.link_rate < max_link_cap.link_rate)
+		max_link_cap.link_rate =
+				link->reported_link_cap.link_rate;
+	if (link->reported_link_cap.link_spread <
+			max_link_cap.link_spread)
+		max_link_cap.link_spread =
+				link->reported_link_cap.link_spread;
+
+	/* Lower link settings based on cable attributes
+	 * Cable ID is a DP2 feature to identify max certified link rate that
+	 * a cable can carry. The cable identification method requires both
+	 * cable and display hardware support. Since the specs comes late, it is
+	 * anticipated that the first round of DP2 cables and displays may not
+	 * be fully compatible to reliably return cable ID data. Therefore the
+	 * decision of our cable id policy is that if the cable can return non
+	 * zero cable id data, we will take cable's link rate capability into
+	 * account. However if we get zero data, the cable link rate capability
+	 * is considered inconclusive. In this case, we will not take cable's
+	 * capability into account to avoid of over limiting hardware capability
+	 * from users. The max overall link rate capability is still determined
+	 * after actual dp pre-training. Cable id is considered as an auxiliary
+	 * method of determining max link bandwidth capability.
+	 */
+	cable_max_link_rate = get_cable_max_link_rate(link);
+
+	if (!link->dc->debug.ignore_cable_id &&
+			cable_max_link_rate != LINK_RATE_UNKNOWN &&
+			cable_max_link_rate < max_link_cap.link_rate)
+		max_link_cap.link_rate = cable_max_link_rate;
+
+	/* account for lttpr repeaters cap
+	 * notes: repeaters do not snoop in the DPRX Capabilities addresses (3.6.3).
+	 */
+	if (dp_is_lttpr_present(link)) {
+		if (link->dpcd_caps.lttpr_caps.max_lane_count < max_link_cap.lane_count)
+			max_link_cap.lane_count = link->dpcd_caps.lttpr_caps.max_lane_count;
+		lttpr_max_link_rate = get_lttpr_max_link_rate(link);
+
+		if (lttpr_max_link_rate < max_link_cap.link_rate)
+			max_link_cap.link_rate = lttpr_max_link_rate;
+
+		DC_LOG_HW_LINK_TRAINING("%s\n Training with LTTPR,  max_lane count %d max_link rate %d \n",
+						__func__,
+						max_link_cap.lane_count,
+						max_link_cap.link_rate);
+	}
+
+	if (link_dp_get_encoding_format(&max_link_cap) == DP_128b_132b_ENCODING &&
+			link->dc->debug.disable_uhbr)
+		max_link_cap.link_rate = LINK_RATE_HIGH3;
+
+	return max_link_cap;
+}
+
+static bool dp_verify_link_cap(
+	struct dc_link *link,
+	struct dc_link_settings *known_limit_link_setting,
+	int *fail_count)
+{
+	struct dc_link_settings cur_link_settings = {0};
+	struct dc_link_settings max_link_settings = *known_limit_link_setting;
+	bool success = false;
+	bool skip_video_pattern;
+	enum clock_source_id dp_cs_id = get_clock_source_id(link);
+	enum link_training_result status = LINK_TRAINING_SUCCESS;
+	union hpd_irq_data irq_data;
+	struct link_resource link_res;
+
+	memset(&irq_data, 0, sizeof(irq_data));
+	cur_link_settings = max_link_settings;
+
+	/* Grant extended timeout request */
+	if (dp_is_lttpr_present(link) && link->dpcd_caps.lttpr_caps.max_ext_timeout > 0) {
+		uint8_t grant = link->dpcd_caps.lttpr_caps.max_ext_timeout & 0x80;
+
+		core_link_write_dpcd(link, DP_PHY_REPEATER_EXTENDED_WAIT_TIMEOUT, &grant, sizeof(grant));
+	}
+
+	do {
+		if (!get_temp_dp_link_res(link, &link_res, &cur_link_settings))
+			continue;
+
+		skip_video_pattern = cur_link_settings.link_rate != LINK_RATE_LOW;
+		dp_enable_link_phy(
+				link,
+				&link_res,
+				link->connector_signal,
+				dp_cs_id,
+				&cur_link_settings);
+
+		status = dp_perform_link_training(
+				link,
+				&link_res,
+				&cur_link_settings,
+				skip_video_pattern);
+
+		if (status == LINK_TRAINING_SUCCESS) {
+			success = true;
+			fsleep(1000);
+			if (dp_read_hpd_rx_irq_data(link, &irq_data) == DC_OK &&
+					dp_parse_link_loss_status(
+							link,
+							&irq_data))
+				(*fail_count)++;
+		} else if (status == LINK_TRAINING_LINK_LOSS) {
+			success = true;
+			(*fail_count)++;
+		} else {
+			(*fail_count)++;
+		}
+		dp_trace_lt_total_count_increment(link, true);
+		dp_trace_lt_result_update(link, status, true);
+		dp_disable_link_phy(link, &link_res, link->connector_signal);
+	} while (!success && decide_fallback_link_setting(link,
+			&max_link_settings, &cur_link_settings, status));
+
+	link->verified_link_cap = success ?
+			cur_link_settings : fail_safe_link_settings;
+	return success;
+}
+
+bool dp_verify_link_cap_with_retries(
+	struct dc_link *link,
+	struct dc_link_settings *known_limit_link_setting,
+	int attempts)
+{
+	int i = 0;
+	bool success = false;
+	int fail_count = 0;
+	struct dc_link_settings last_verified_link_cap = fail_safe_link_settings;
+
+	dp_trace_detect_lt_init(link);
+
+	if (link->link_enc && link->link_enc->features.flags.bits.DP_IS_USB_C &&
+			link->dc->debug.usbc_combo_phy_reset_wa)
+		apply_usbc_combo_phy_reset_wa(link, known_limit_link_setting);
+
+	dp_trace_set_lt_start_timestamp(link, false);
+	for (i = 0; i < attempts; i++) {
+		enum dc_connection_type type = dc_connection_none;
+
+		memset(&link->verified_link_cap, 0,
+				sizeof(struct dc_link_settings));
+		if (!link_detect_connection_type(link, &type) || type == dc_connection_none) {
+			link->verified_link_cap = fail_safe_link_settings;
+			break;
+		} else if (dp_verify_link_cap(link, known_limit_link_setting, &fail_count)) {
+			last_verified_link_cap = link->verified_link_cap;
+			if (fail_count == 0) {
+				success = true;
+				break;
+			}
+		} else {
+			link->verified_link_cap = last_verified_link_cap;
+		}
+		fsleep(10 * 1000);
+	}
+
+	dp_trace_lt_fail_count_update(link, fail_count, true);
+	dp_trace_set_lt_end_timestamp(link, true);
+
+	return success;
+}
+
+/*
+ * Check if there is a native DP or passive DP-HDMI dongle connected
+ */
+bool dp_is_sink_present(struct dc_link *link)
+{
+	enum gpio_result gpio_result;
+	uint32_t clock_pin = 0;
+	uint8_t retry = 0;
+	struct ddc *ddc;
+
+	enum connector_id connector_id =
+		dal_graphics_object_id_get_connector_id(link->link_id);
+
+	bool present =
+		((connector_id == CONNECTOR_ID_DISPLAY_PORT) ||
+		(connector_id == CONNECTOR_ID_EDP) ||
+		(connector_id == CONNECTOR_ID_USBC));
+
+	ddc = get_ddc_pin(link->ddc);
+
+	if (!ddc) {
+		BREAK_TO_DEBUGGER();
+		return present;
+	}
+
+	/* Open GPIO and set it to I2C mode */
+	/* Note: this GpioMode_Input will be converted
+	 * to GpioConfigType_I2cAuxDualMode in GPIO component,
+	 * which indicates we need additional delay
+	 */
+
+	if (dal_ddc_open(ddc, GPIO_MODE_INPUT,
+			 GPIO_DDC_CONFIG_TYPE_MODE_I2C) != GPIO_RESULT_OK) {
+		dal_ddc_close(ddc);
+
+		return present;
+	}
+
+	/*
+	 * Read GPIO: DP sink is present if both clock and data pins are zero
+	 *
+	 * [W/A] plug-unplug DP cable, sometimes customer board has
+	 * one short pulse on clk_pin(1V, < 1ms). DP will be config to HDMI/DVI
+	 * then monitor can't br light up. Add retry 3 times
+	 * But in real passive dongle, it need additional 3ms to detect
+	 */
+	do {
+		gpio_result = dal_gpio_get_value(ddc->pin_clock, &clock_pin);
+		ASSERT(gpio_result == GPIO_RESULT_OK);
+		if (clock_pin)
+			fsleep(1000);
+		else
+			break;
+	} while (retry++ < 3);
+
+	present = (gpio_result == GPIO_RESULT_OK) && !clock_pin;
+
+	dal_ddc_close(ddc);
+
+	return present;
+}
diff --git a/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_capability.h b/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_capability.h
new file mode 100644
index 000000000..8f0ce97f2
--- /dev/null
+++ b/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_capability.h
@@ -0,0 +1,107 @@
+/*
+ * Copyright 2022 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 __DC_LINK_DP_CAPABILITY_H__
+#define __DC_LINK_DP_CAPABILITY_H__
+
+#include "link.h"
+
+bool detect_dp_sink_caps(struct dc_link *link);
+
+void detect_edp_sink_caps(struct dc_link *link);
+
+struct dc_link_settings dp_get_max_link_cap(struct dc_link *link);
+
+bool dp_get_max_link_enc_cap(const struct dc_link *link,
+		struct dc_link_settings *max_link_enc_cap);
+
+const struct dc_link_settings *dp_get_verified_link_cap(
+		const struct dc_link *link);
+
+enum dp_link_encoding link_dp_get_encoding_format(
+		const struct dc_link_settings *link_settings);
+
+enum dc_status dp_retrieve_lttpr_cap(struct dc_link *link);
+
+/* Convert PHY repeater count read from DPCD uint8_t. */
+uint8_t dp_parse_lttpr_repeater_count(uint8_t lttpr_repeater_count);
+
+bool dp_is_sink_present(struct dc_link *link);
+
+bool dp_is_lttpr_present(struct dc_link *link);
+
+bool dp_is_fec_supported(const struct dc_link *link);
+
+bool is_dp_active_dongle(const struct dc_link *link);
+
+bool is_dp_branch_device(const struct dc_link *link);
+
+void dpcd_write_cable_id_to_dprx(struct dc_link *link);
+
+bool dp_should_enable_fec(const struct dc_link *link);
+
+bool dp_is_128b_132b_signal(struct pipe_ctx *pipe_ctx);
+
+/* Initialize output parameter lt_settings. */
+void dp_decide_training_settings(
+	struct dc_link *link,
+	const struct dc_link_settings *link_setting,
+	struct link_training_settings *lt_settings);
+
+bool link_decide_link_settings(
+	struct dc_stream_state *stream,
+	struct dc_link_settings *link_setting);
+
+bool edp_decide_link_settings(struct dc_link *link,
+		struct dc_link_settings *link_setting, uint32_t req_bw);
+
+bool decide_edp_link_settings_with_dsc(struct dc_link *link,
+		struct dc_link_settings *link_setting,
+		uint32_t req_bw,
+		enum dc_link_rate max_link_rate);
+
+enum dp_link_encoding mst_decide_link_encoding_format(const struct dc_link *link);
+
+void dpcd_set_source_specific_data(struct dc_link *link);
+
+/*query dpcd for version and mst cap addresses*/
+bool read_is_mst_supported(struct dc_link *link);
+
+bool decide_fallback_link_setting(
+		struct dc_link *link,
+		struct dc_link_settings *max,
+		struct dc_link_settings *cur,
+		enum link_training_result training_result);
+
+bool dp_verify_link_cap_with_retries(
+	struct dc_link *link,
+	struct dc_link_settings *known_limit_link_setting,
+	int attempts);
+
+uint32_t link_bw_kbps_from_raw_frl_link_rate_data(uint8_t bw);
+
+bool dp_overwrite_extended_receiver_cap(struct dc_link *link);
+
+#endif /* __DC_LINK_DP_CAPABILITY_H__ */
diff --git a/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_dpia.c b/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_dpia.c
new file mode 100644
index 000000000..0bb749133
--- /dev/null
+++ b/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_dpia.c
@@ -0,0 +1,105 @@
+// SPDX-License-Identifier: MIT
+/*
+ * Copyright 2021 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 "dc.h"
+#include "inc/core_status.h"
+#include "dpcd_defs.h"
+
+#include "link_dp_dpia.h"
+#include "link_hwss.h"
+#include "dm_helpers.h"
+#include "dmub/inc/dmub_cmd.h"
+#include "link_dpcd.h"
+#include "link_dp_training.h"
+#include "dc_dmub_srv.h"
+
+#define DC_LOGGER \
+	link->ctx->logger
+
+/** @note Can remove once DP tunneling registers in upstream include/drm/drm_dp_helper.h */
+/* DPCD DP Tunneling over USB4 */
+#define DP_TUNNELING_CAPABILITIES_SUPPORT 0xe000d
+#define DP_IN_ADAPTER_INFO                0xe000e
+#define DP_USB4_DRIVER_ID                 0xe000f
+#define DP_USB4_ROUTER_TOPOLOGY_ID        0xe001b
+
+enum dc_status dpcd_get_tunneling_device_data(struct dc_link *link)
+{
+	enum dc_status status = DC_OK;
+	uint8_t dpcd_dp_tun_data[3] = {0};
+	uint8_t dpcd_topology_data[DPCD_USB4_TOPOLOGY_ID_LEN] = {0};
+	uint8_t i = 0;
+
+	status = core_link_read_dpcd(
+			link,
+			DP_TUNNELING_CAPABILITIES_SUPPORT,
+			dpcd_dp_tun_data,
+			sizeof(dpcd_dp_tun_data));
+
+	status = core_link_read_dpcd(
+			link,
+			DP_USB4_ROUTER_TOPOLOGY_ID,
+			dpcd_topology_data,
+			sizeof(dpcd_topology_data));
+
+	link->dpcd_caps.usb4_dp_tun_info.dp_tun_cap.raw =
+			dpcd_dp_tun_data[DP_TUNNELING_CAPABILITIES_SUPPORT - DP_TUNNELING_CAPABILITIES_SUPPORT];
+	link->dpcd_caps.usb4_dp_tun_info.dpia_info.raw =
+			dpcd_dp_tun_data[DP_IN_ADAPTER_INFO - DP_TUNNELING_CAPABILITIES_SUPPORT];
+	link->dpcd_caps.usb4_dp_tun_info.usb4_driver_id =
+			dpcd_dp_tun_data[DP_USB4_DRIVER_ID - DP_TUNNELING_CAPABILITIES_SUPPORT];
+
+	for (i = 0; i < DPCD_USB4_TOPOLOGY_ID_LEN; i++)
+		link->dpcd_caps.usb4_dp_tun_info.usb4_topology_id[i] = dpcd_topology_data[i];
+
+	return status;
+}
+
+bool dpia_query_hpd_status(struct dc_link *link)
+{
+	union dmub_rb_cmd cmd = {0};
+	struct dc_dmub_srv *dmub_srv = link->ctx->dmub_srv;
+	bool is_hpd_high = false;
+
+	/* prepare QUERY_HPD command */
+	cmd.query_hpd.header.type = DMUB_CMD__QUERY_HPD_STATE;
+	cmd.query_hpd.data.instance = link->link_id.enum_id - ENUM_ID_1;
+	cmd.query_hpd.data.ch_type = AUX_CHANNEL_DPIA;
+
+	/* Return HPD status reported by DMUB if query successfully executed. */
+	if (dm_execute_dmub_cmd(dmub_srv->ctx, &cmd, DM_DMUB_WAIT_TYPE_WAIT_WITH_REPLY) && cmd.query_hpd.data.status == AUX_RET_SUCCESS)
+		is_hpd_high = cmd.query_hpd.data.result;
+
+	DC_LOG_DEBUG("%s: link(%d) dpia(%d) cmd_status(%d) result(%d)\n",
+		__func__,
+		link->link_index,
+		link->link_id.enum_id - ENUM_ID_1,
+		cmd.query_hpd.data.status,
+		cmd.query_hpd.data.result);
+
+	return is_hpd_high;
+}
+
diff --git a/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_dpia.h b/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_dpia.h
new file mode 100644
index 000000000..363f45a1a
--- /dev/null
+++ b/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_dpia.h
@@ -0,0 +1,41 @@
+/* SPDX-License-Identifier: MIT */
+/*
+ * Copyright 2021 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 __DC_LINK_DPIA_H__
+#define __DC_LINK_DPIA_H__
+
+#include "link.h"
+
+/* Read tunneling device capability from DPCD and update link capability
+ * accordingly.
+ */
+enum dc_status dpcd_get_tunneling_device_data(struct dc_link *link);
+
+/* Query hot plug status of USB4 DP tunnel.
+ * Returns true if HPD high.
+ */
+bool dpia_query_hpd_status(struct dc_link *link);
+#endif /* __DC_LINK_DPIA_H__ */
diff --git a/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_dpia_bw.c b/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_dpia_bw.c
new file mode 100644
index 000000000..7581023da
--- /dev/null
+++ b/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_dpia_bw.c
@@ -0,0 +1,492 @@
+
+/*
+ * Copyright 2022 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
+ *
+ */
+/*********************************************************************/
+//				USB4 DPIA BANDWIDTH ALLOCATION LOGIC
+/*********************************************************************/
+#include "link_dp_dpia_bw.h"
+#include "link_dpcd.h"
+#include "dc_dmub_srv.h"
+
+#define DC_LOGGER \
+	link->ctx->logger
+
+#define Kbps_TO_Gbps (1000 * 1000)
+
+// ------------------------------------------------------------------
+//					PRIVATE FUNCTIONS
+// ------------------------------------------------------------------
+/*
+ * Always Check the following:
+ *  - Is it USB4 link?
+ *  - Is HPD HIGH?
+ *  - Is BW Allocation Support Mode enabled on DP-Tx?
+ */
+static bool get_bw_alloc_proceed_flag(struct dc_link *tmp)
+{
+	return (tmp && DISPLAY_ENDPOINT_USB4_DPIA == tmp->ep_type
+			&& tmp->hpd_status
+			&& tmp->dpia_bw_alloc_config.bw_alloc_enabled);
+}
+static void reset_bw_alloc_struct(struct dc_link *link)
+{
+	link->dpia_bw_alloc_config.bw_alloc_enabled = false;
+	link->dpia_bw_alloc_config.sink_verified_bw = 0;
+	link->dpia_bw_alloc_config.sink_max_bw = 0;
+	link->dpia_bw_alloc_config.estimated_bw = 0;
+	link->dpia_bw_alloc_config.bw_granularity = 0;
+	link->dpia_bw_alloc_config.response_ready = false;
+}
+static uint8_t get_bw_granularity(struct dc_link *link)
+{
+	uint8_t bw_granularity = 0;
+
+	core_link_read_dpcd(
+			link,
+			DP_BW_GRANULALITY,
+			&bw_granularity,
+			sizeof(uint8_t));
+
+	switch (bw_granularity & 0x3) {
+	case 0:
+		bw_granularity = 4;
+		break;
+	case 1:
+	default:
+		bw_granularity = 2;
+		break;
+	}
+
+	return bw_granularity;
+}
+static int get_estimated_bw(struct dc_link *link)
+{
+	uint8_t bw_estimated_bw = 0;
+
+	core_link_read_dpcd(
+			link,
+			ESTIMATED_BW,
+			&bw_estimated_bw,
+			sizeof(uint8_t));
+
+	return bw_estimated_bw * (Kbps_TO_Gbps / link->dpia_bw_alloc_config.bw_granularity);
+}
+static bool allocate_usb4_bw(int *stream_allocated_bw, int bw_needed, struct dc_link *link)
+{
+	if (bw_needed > 0)
+		*stream_allocated_bw += bw_needed;
+
+	return true;
+}
+static bool deallocate_usb4_bw(int *stream_allocated_bw, int bw_to_dealloc, struct dc_link *link)
+{
+	bool ret = false;
+
+	if (*stream_allocated_bw > 0) {
+		*stream_allocated_bw -= bw_to_dealloc;
+		ret = true;
+	} else {
+		//Do nothing for now
+		ret = true;
+	}
+
+	// Unplug so reset values
+	if (!link->hpd_status)
+		reset_bw_alloc_struct(link);
+
+	return ret;
+}
+/*
+ * Read all New BW alloc configuration ex: estimated_bw, allocated_bw,
+ * granuality, Driver_ID, CM_Group, & populate the BW allocation structs
+ * for host router and dpia
+ */
+static void init_usb4_bw_struct(struct dc_link *link)
+{
+	// Init the known values
+	link->dpia_bw_alloc_config.bw_granularity = get_bw_granularity(link);
+	link->dpia_bw_alloc_config.estimated_bw = get_estimated_bw(link);
+}
+static uint8_t get_lowest_dpia_index(struct dc_link *link)
+{
+	const struct dc *dc_struct = link->dc;
+	uint8_t idx = 0xFF;
+	int i;
+
+	for (i = 0; i < MAX_PIPES * 2; ++i) {
+
+		if (!dc_struct->links[i] ||
+				dc_struct->links[i]->ep_type != DISPLAY_ENDPOINT_USB4_DPIA)
+			continue;
+
+		if (idx > dc_struct->links[i]->link_index)
+			idx = dc_struct->links[i]->link_index;
+	}
+
+	return idx;
+}
+/*
+ * Get the Max Available BW or Max Estimated BW for each Host Router
+ *
+ * @link: pointer to the dc_link struct instance
+ * @type: ESTIMATD BW or MAX AVAILABLE BW
+ *
+ * return: response_ready flag from dc_link struct
+ */
+static int get_host_router_total_bw(struct dc_link *link, uint8_t type)
+{
+	const struct dc *dc_struct = link->dc;
+	uint8_t lowest_dpia_index = get_lowest_dpia_index(link);
+	uint8_t idx = (link->link_index - lowest_dpia_index) / 2, idx_temp = 0;
+	struct dc_link *link_temp;
+	int total_bw = 0;
+	int i;
+
+	for (i = 0; i < MAX_PIPES * 2; ++i) {
+
+		if (!dc_struct->links[i] || dc_struct->links[i]->ep_type != DISPLAY_ENDPOINT_USB4_DPIA)
+			continue;
+
+		link_temp = dc_struct->links[i];
+		if (!link_temp || !link_temp->hpd_status)
+			continue;
+
+		idx_temp = (link_temp->link_index - lowest_dpia_index) / 2;
+
+		if (idx_temp == idx) {
+
+			if (type == HOST_ROUTER_BW_ESTIMATED)
+				total_bw += link_temp->dpia_bw_alloc_config.estimated_bw;
+			else if (type == HOST_ROUTER_BW_ALLOCATED)
+				total_bw += link_temp->dpia_bw_alloc_config.sink_allocated_bw;
+		}
+	}
+
+	return total_bw;
+}
+/*
+ * Cleanup function for when the dpia is unplugged to reset struct
+ * and perform any required clean up
+ *
+ * @link: pointer to the dc_link struct instance
+ *
+ * return: none
+ */
+static bool dpia_bw_alloc_unplug(struct dc_link *link)
+{
+	if (!link)
+		return true;
+
+	return deallocate_usb4_bw(&link->dpia_bw_alloc_config.sink_allocated_bw,
+			link->dpia_bw_alloc_config.sink_allocated_bw, link);
+}
+static void set_usb4_req_bw_req(struct dc_link *link, int req_bw)
+{
+	uint8_t requested_bw;
+	uint32_t temp;
+
+	// 1. Add check for this corner case #1
+	if (req_bw > link->dpia_bw_alloc_config.estimated_bw)
+		req_bw = link->dpia_bw_alloc_config.estimated_bw;
+
+	temp = req_bw * link->dpia_bw_alloc_config.bw_granularity;
+	requested_bw = temp / Kbps_TO_Gbps;
+
+	// Always make sure to add more to account for floating points
+	if (temp % Kbps_TO_Gbps)
+		++requested_bw;
+
+	// 2. Add check for this corner case #2
+	req_bw = requested_bw * (Kbps_TO_Gbps / link->dpia_bw_alloc_config.bw_granularity);
+	if (req_bw == link->dpia_bw_alloc_config.sink_allocated_bw)
+		return;
+
+	if (core_link_write_dpcd(
+		link,
+		REQUESTED_BW,
+		&requested_bw,
+		sizeof(uint8_t)) == DC_OK)
+		link->dpia_bw_alloc_config.response_ready = false; // Reset flag
+}
+/*
+ * Return the response_ready flag from dc_link struct
+ *
+ * @link: pointer to the dc_link struct instance
+ *
+ * return: response_ready flag from dc_link struct
+ */
+static bool get_cm_response_ready_flag(struct dc_link *link)
+{
+	return link->dpia_bw_alloc_config.response_ready;
+}
+// ------------------------------------------------------------------
+//					PUBLIC FUNCTIONS
+// ------------------------------------------------------------------
+bool link_dp_dpia_set_dptx_usb4_bw_alloc_support(struct dc_link *link)
+{
+	bool ret = false;
+	uint8_t response = 0,
+			bw_support_dpia = 0,
+			bw_support_cm = 0;
+
+	if (!(link->ep_type == DISPLAY_ENDPOINT_USB4_DPIA && link->hpd_status))
+		goto out;
+
+	if (core_link_read_dpcd(
+			link,
+			DP_TUNNELING_CAPABILITIES,
+			&response,
+			sizeof(uint8_t)) == DC_OK)
+		bw_support_dpia = (response >> 7) & 1;
+
+	if (core_link_read_dpcd(
+		link,
+		USB4_DRIVER_BW_CAPABILITY,
+		&response,
+		sizeof(uint8_t)) == DC_OK)
+		bw_support_cm = (response >> 7) & 1;
+
+	/* Send request acknowledgment to Turn ON DPTX support */
+	if (bw_support_cm && bw_support_dpia) {
+
+		response = 0x80;
+		if (core_link_write_dpcd(
+				link,
+				DPTX_BW_ALLOCATION_MODE_CONTROL,
+				&response,
+				sizeof(uint8_t)) != DC_OK) {
+			DC_LOG_DEBUG("%s: **** FAILURE Enabling DPtx BW Allocation Mode Support ***\n",
+					__func__);
+		} else {
+			// SUCCESS Enabled DPtx BW Allocation Mode Support
+			link->dpia_bw_alloc_config.bw_alloc_enabled = true;
+			DC_LOG_DEBUG("%s: **** SUCCESS Enabling DPtx BW Allocation Mode Support ***\n",
+					__func__);
+
+			ret = true;
+			init_usb4_bw_struct(link);
+		}
+	}
+
+out:
+	return ret;
+}
+void dpia_handle_bw_alloc_response(struct dc_link *link, uint8_t bw, uint8_t result)
+{
+	int bw_needed = 0;
+	int estimated = 0;
+	int host_router_total_estimated_bw = 0;
+
+	if (!get_bw_alloc_proceed_flag((link)))
+		return;
+
+	switch (result) {
+
+	case DPIA_BW_REQ_FAILED:
+
+		DC_LOG_DEBUG("%s: *** *** BW REQ FAILURE for DP-TX Request *** ***\n", __func__);
+
+		// Update the new Estimated BW value updated by CM
+		link->dpia_bw_alloc_config.estimated_bw =
+				bw * (Kbps_TO_Gbps / link->dpia_bw_alloc_config.bw_granularity);
+
+		set_usb4_req_bw_req(link, link->dpia_bw_alloc_config.estimated_bw);
+		link->dpia_bw_alloc_config.response_ready = false;
+
+		/*
+		 * If FAIL then it is either:
+		 * 1. Due to DP-Tx trying to allocate more than available i.e. it failed locally
+		 *    => get estimated and allocate that
+		 * 2. Due to the fact that DP-Tx tried to allocated ESTIMATED BW and failed then
+		 *    CM will have to update 0xE0023 with new ESTIMATED BW value.
+		 */
+		break;
+
+	case DPIA_BW_REQ_SUCCESS:
+
+		DC_LOG_DEBUG("%s: *** BW REQ SUCCESS for DP-TX Request ***\n", __func__);
+
+		// 1. SUCCESS 1st time before any Pruning is done
+		// 2. SUCCESS after prev. FAIL before any Pruning is done
+		// 3. SUCCESS after Pruning is done but before enabling link
+
+		bw_needed = bw * (Kbps_TO_Gbps / link->dpia_bw_alloc_config.bw_granularity);
+
+		// 1.
+		if (!link->dpia_bw_alloc_config.sink_allocated_bw) {
+
+			allocate_usb4_bw(&link->dpia_bw_alloc_config.sink_allocated_bw, bw_needed, link);
+			link->dpia_bw_alloc_config.sink_verified_bw =
+					link->dpia_bw_alloc_config.sink_allocated_bw;
+
+			// SUCCESS from first attempt
+			if (link->dpia_bw_alloc_config.sink_allocated_bw >
+			link->dpia_bw_alloc_config.sink_max_bw)
+				link->dpia_bw_alloc_config.sink_verified_bw =
+						link->dpia_bw_alloc_config.sink_max_bw;
+		}
+		// 3.
+		else if (link->dpia_bw_alloc_config.sink_allocated_bw) {
+
+			// Find out how much do we need to de-alloc
+			if (link->dpia_bw_alloc_config.sink_allocated_bw > bw_needed)
+				deallocate_usb4_bw(&link->dpia_bw_alloc_config.sink_allocated_bw,
+						link->dpia_bw_alloc_config.sink_allocated_bw - bw_needed, link);
+			else
+				allocate_usb4_bw(&link->dpia_bw_alloc_config.sink_allocated_bw,
+						bw_needed - link->dpia_bw_alloc_config.sink_allocated_bw, link);
+		}
+
+		// 4. If this is the 2nd sink then any unused bw will be reallocated to master DPIA
+		// => check if estimated_bw changed
+
+		link->dpia_bw_alloc_config.response_ready = true;
+		break;
+
+	case DPIA_EST_BW_CHANGED:
+
+		DC_LOG_DEBUG("%s: *** ESTIMATED BW CHANGED for DP-TX Request ***\n", __func__);
+
+		estimated = bw * (Kbps_TO_Gbps / link->dpia_bw_alloc_config.bw_granularity);
+		host_router_total_estimated_bw = get_host_router_total_bw(link, HOST_ROUTER_BW_ESTIMATED);
+
+		// 1. If due to unplug of other sink
+		if (estimated == host_router_total_estimated_bw) {
+			// First update the estimated & max_bw fields
+			if (link->dpia_bw_alloc_config.estimated_bw < estimated)
+				link->dpia_bw_alloc_config.estimated_bw = estimated;
+		}
+		// 2. If due to realloc bw btw 2 dpia due to plug OR realloc unused Bw
+		else {
+			// We lost estimated bw usually due to plug event of other dpia
+			link->dpia_bw_alloc_config.estimated_bw = estimated;
+		}
+		break;
+
+	case DPIA_BW_ALLOC_CAPS_CHANGED:
+
+		DC_LOG_DEBUG("%s: *** BW ALLOC CAPABILITY CHANGED for DP-TX Request ***\n", __func__);
+		link->dpia_bw_alloc_config.bw_alloc_enabled = false;
+		break;
+	}
+}
+int dpia_handle_usb4_bandwidth_allocation_for_link(struct dc_link *link, int peak_bw)
+{
+	int ret = 0;
+	uint8_t timeout = 10;
+
+	if (!(link && DISPLAY_ENDPOINT_USB4_DPIA == link->ep_type
+			&& link->dpia_bw_alloc_config.bw_alloc_enabled))
+		goto out;
+
+	//1. Hot Plug
+	if (link->hpd_status && peak_bw > 0) {
+
+		// If DP over USB4 then we need to check BW allocation
+		link->dpia_bw_alloc_config.sink_max_bw = peak_bw;
+		set_usb4_req_bw_req(link, link->dpia_bw_alloc_config.sink_max_bw);
+
+		do {
+			if (!(timeout > 0))
+				timeout--;
+			else
+				break;
+			fsleep(10 * 1000);
+		} while (!get_cm_response_ready_flag(link));
+
+		if (!timeout)
+			ret = 0;// ERROR TIMEOUT waiting for response for allocating bw
+		else if (link->dpia_bw_alloc_config.sink_allocated_bw > 0)
+			ret = get_host_router_total_bw(link, HOST_ROUTER_BW_ALLOCATED);
+	}
+	//2. Cold Unplug
+	else if (!link->hpd_status)
+		dpia_bw_alloc_unplug(link);
+
+out:
+	return ret;
+}
+int link_dp_dpia_allocate_usb4_bandwidth_for_stream(struct dc_link *link, int req_bw)
+{
+	int ret = 0;
+	uint8_t timeout = 10;
+
+	if (!get_bw_alloc_proceed_flag(link))
+		goto out;
+
+	/*
+	 * Sometimes stream uses same timing parameters as the already
+	 * allocated max sink bw so no need to re-alloc
+	 */
+	if (req_bw != link->dpia_bw_alloc_config.sink_allocated_bw) {
+		set_usb4_req_bw_req(link, req_bw);
+		do {
+			if (!(timeout > 0))
+				timeout--;
+			else
+				break;
+			udelay(10 * 1000);
+		} while (!get_cm_response_ready_flag(link));
+
+		if (!timeout)
+			ret = 0;// ERROR TIMEOUT waiting for response for allocating bw
+		else if (link->dpia_bw_alloc_config.sink_allocated_bw > 0)
+			ret = get_host_router_total_bw(link, HOST_ROUTER_BW_ALLOCATED);
+	}
+
+out:
+	return ret;
+}
+bool dpia_validate_usb4_bw(struct dc_link **link, int *bw_needed_per_dpia, const unsigned int num_dpias)
+{
+	bool ret = true;
+	int bw_needed_per_hr[MAX_HR_NUM] = { 0, 0 };
+	uint8_t lowest_dpia_index = 0, dpia_index = 0;
+	uint8_t i;
+
+	if (!num_dpias || num_dpias > MAX_DPIA_NUM)
+		return ret;
+
+	//Get total Host Router BW & Validate against each Host Router max BW
+	for (i = 0; i < num_dpias; ++i) {
+
+		if (!link[i]->dpia_bw_alloc_config.bw_alloc_enabled)
+			continue;
+
+		lowest_dpia_index = get_lowest_dpia_index(link[i]);
+		if (link[i]->link_index < lowest_dpia_index)
+			continue;
+
+		dpia_index = (link[i]->link_index - lowest_dpia_index) / 2;
+		bw_needed_per_hr[dpia_index] += bw_needed_per_dpia[i];
+		if (bw_needed_per_hr[dpia_index] > get_host_router_total_bw(link[i], HOST_ROUTER_BW_ALLOCATED)) {
+
+			ret = false;
+			break;
+		}
+	}
+
+	return ret;
+}
diff --git a/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_dpia_bw.h b/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_dpia_bw.h
new file mode 100644
index 000000000..729269038
--- /dev/null
+++ b/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_dpia_bw.h
@@ -0,0 +1,102 @@
+/*
+ * Copyright 2021 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 DC_INC_LINK_DP_DPIA_BW_H_
+#define DC_INC_LINK_DP_DPIA_BW_H_
+
+#include "link.h"
+
+/* Number of Host Routers per motherboard is 2 */
+#define MAX_HR_NUM			2
+/* Number of DPIA per host router is 2 */
+#define MAX_DPIA_NUM		(MAX_HR_NUM * 2)
+
+/*
+ * Host Router BW type
+ */
+enum bw_type {
+	HOST_ROUTER_BW_ESTIMATED,
+	HOST_ROUTER_BW_ALLOCATED,
+	HOST_ROUTER_BW_INVALID,
+};
+
+/*
+ * Enable BW Allocation Mode Support from the DP-Tx side
+ *
+ * @link: pointer to the dc_link struct instance
+ *
+ * return: SUCCESS or FAILURE
+ */
+bool link_dp_dpia_set_dptx_usb4_bw_alloc_support(struct dc_link *link);
+
+/*
+ * Allocates only what the stream needs for bw, so if:
+ * If (stream_req_bw < or > already_allocated_bw_at_HPD)
+ * => Deallocate Max Bw & then allocate only what the stream needs
+ *
+ * @link: pointer to the dc_link struct instance
+ * @req_bw: Bw requested by the stream
+ *
+ * return: allocated bw else return 0
+ */
+int link_dp_dpia_allocate_usb4_bandwidth_for_stream(struct dc_link *link, int req_bw);
+
+/*
+ * Handle the USB4 BW Allocation related functionality here:
+ * Plug => Try to allocate max bw from timing parameters supported by the sink
+ * Unplug => de-allocate bw
+ *
+ * @link: pointer to the dc_link struct instance
+ * @peak_bw: Peak bw used by the link/sink
+ *
+ * return: allocated bw else return 0
+ */
+int dpia_handle_usb4_bandwidth_allocation_for_link(struct dc_link *link, int peak_bw);
+
+/*
+ * Handle function for when the status of the Request above is complete.
+ * We will find out the result of allocating on CM and update structs.
+ *
+ * @link: pointer to the dc_link struct instance
+ * @bw: Allocated or Estimated BW depending on the result
+ * @result: Response type
+ *
+ * return: none
+ */
+void dpia_handle_bw_alloc_response(struct dc_link *link, uint8_t bw, uint8_t result);
+
+/*
+ * Handle the validation of total BW here and confirm that the bw used by each
+ * DPIA doesn't exceed available BW for each host router (HR)
+ *
+ * @link[]: array of link pointer to all possible DPIA links
+ * @bw_needed[]: bw needed for each DPIA link based on timing
+ * @num_dpias: Number of DPIAs for the above 2 arrays. Should always be <= MAX_DPIA_NUM
+ *
+ * return: TRUE if bw used by DPIAs doesn't exceed available BW else return FALSE
+ */
+bool dpia_validate_usb4_bw(struct dc_link **link, int *bw_needed, const unsigned int num_dpias);
+
+#endif /* DC_INC_LINK_DP_DPIA_BW_H_ */
diff --git a/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_irq_handler.c b/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_irq_handler.c
new file mode 100644
index 000000000..e047bbeaa
--- /dev/null
+++ b/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_irq_handler.c
@@ -0,0 +1,490 @@
+/*
+ * Copyright 2022 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
+ *
+ */
+
+/* FILE POLICY AND INTENDED USAGE:
+ * This file implements DP HPD short pulse handling sequence according to DP
+ * specifications
+ *
+ */
+
+#include "link_dp_irq_handler.h"
+#include "link_dpcd.h"
+#include "link_dp_training.h"
+#include "link_dp_capability.h"
+#include "link_edp_panel_control.h"
+#include "link/accessories/link_dp_trace.h"
+#include "link/link_dpms.h"
+#include "dm_helpers.h"
+
+#define DC_LOGGER_INIT(logger)
+
+bool dp_parse_link_loss_status(
+	struct dc_link *link,
+	union hpd_irq_data *hpd_irq_dpcd_data)
+{
+	uint8_t irq_reg_rx_power_state = 0;
+	enum dc_status dpcd_result = DC_ERROR_UNEXPECTED;
+	union lane_status lane_status;
+	uint32_t lane;
+	bool sink_status_changed;
+	bool return_code;
+
+	sink_status_changed = false;
+	return_code = false;
+
+	if (link->cur_link_settings.lane_count == 0)
+		return return_code;
+
+	/*1. Check that Link Status changed, before re-training.*/
+
+	/*parse lane status*/
+	for (lane = 0; lane < link->cur_link_settings.lane_count; lane++) {
+		/* check status of lanes 0,1
+		 * changed DpcdAddress_Lane01Status (0x202)
+		 */
+		lane_status.raw = dp_get_nibble_at_index(
+			&hpd_irq_dpcd_data->bytes.lane01_status.raw,
+			lane);
+
+		if (!lane_status.bits.CHANNEL_EQ_DONE_0 ||
+			!lane_status.bits.CR_DONE_0 ||
+			!lane_status.bits.SYMBOL_LOCKED_0) {
+			/* if one of the channel equalization, clock
+			 * recovery or symbol lock is dropped
+			 * consider it as (link has been
+			 * dropped) dp sink status has changed
+			 */
+			sink_status_changed = true;
+			break;
+		}
+	}
+
+	/* Check interlane align.*/
+	if (link_dp_get_encoding_format(&link->cur_link_settings) == DP_128b_132b_ENCODING &&
+			(!hpd_irq_dpcd_data->bytes.lane_status_updated.bits.EQ_INTERLANE_ALIGN_DONE_128b_132b ||
+			 !hpd_irq_dpcd_data->bytes.lane_status_updated.bits.CDS_INTERLANE_ALIGN_DONE_128b_132b)) {
+		sink_status_changed = true;
+	} else if (!hpd_irq_dpcd_data->bytes.lane_status_updated.bits.INTERLANE_ALIGN_DONE) {
+		sink_status_changed = true;
+	}
+
+	if (sink_status_changed) {
+
+		DC_LOG_HW_HPD_IRQ("%s: Link Status changed.\n", __func__);
+
+		return_code = true;
+
+		/*2. Check that we can handle interrupt: Not in FS DOS,
+		 *  Not in "Display Timeout" state, Link is trained.
+		 */
+		dpcd_result = core_link_read_dpcd(link,
+			DP_SET_POWER,
+			&irq_reg_rx_power_state,
+			sizeof(irq_reg_rx_power_state));
+
+		if (dpcd_result != DC_OK) {
+			DC_LOG_HW_HPD_IRQ("%s: DPCD read failed to obtain power state.\n",
+				__func__);
+		} else {
+			if (irq_reg_rx_power_state != DP_SET_POWER_D0)
+				return_code = false;
+		}
+	}
+
+	return return_code;
+}
+
+static bool handle_hpd_irq_psr_sink(struct dc_link *link)
+{
+	union dpcd_psr_configuration psr_configuration;
+
+	if (!link->psr_settings.psr_feature_enabled)
+		return false;
+
+	dm_helpers_dp_read_dpcd(
+		link->ctx,
+		link,
+		368,/*DpcdAddress_PSR_Enable_Cfg*/
+		&psr_configuration.raw,
+		sizeof(psr_configuration.raw));
+
+	if (psr_configuration.bits.ENABLE) {
+		unsigned char dpcdbuf[3] = {0};
+		union psr_error_status psr_error_status;
+		union psr_sink_psr_status psr_sink_psr_status;
+
+		dm_helpers_dp_read_dpcd(
+			link->ctx,
+			link,
+			0x2006, /*DpcdAddress_PSR_Error_Status*/
+			(unsigned char *) dpcdbuf,
+			sizeof(dpcdbuf));
+
+		/*DPCD 2006h   ERROR STATUS*/
+		psr_error_status.raw = dpcdbuf[0];
+		/*DPCD 2008h   SINK PANEL SELF REFRESH STATUS*/
+		psr_sink_psr_status.raw = dpcdbuf[2];
+
+		if (psr_error_status.bits.LINK_CRC_ERROR ||
+				psr_error_status.bits.RFB_STORAGE_ERROR ||
+				psr_error_status.bits.VSC_SDP_ERROR) {
+			bool allow_active;
+
+			/* Acknowledge and clear error bits */
+			dm_helpers_dp_write_dpcd(
+				link->ctx,
+				link,
+				8198,/*DpcdAddress_PSR_Error_Status*/
+				&psr_error_status.raw,
+				sizeof(psr_error_status.raw));
+
+			/* PSR error, disable and re-enable PSR */
+			if (link->psr_settings.psr_allow_active) {
+				allow_active = false;
+				edp_set_psr_allow_active(link, &allow_active, true, false, NULL);
+				allow_active = true;
+				edp_set_psr_allow_active(link, &allow_active, true, false, NULL);
+			}
+
+			return true;
+		} else if (psr_sink_psr_status.bits.SINK_SELF_REFRESH_STATUS ==
+				PSR_SINK_STATE_ACTIVE_DISPLAY_FROM_SINK_RFB){
+			/* No error is detect, PSR is active.
+			 * We should return with IRQ_HPD handled without
+			 * checking for loss of sync since PSR would have
+			 * powered down main link.
+			 */
+			return true;
+		}
+	}
+	return false;
+}
+
+static bool handle_hpd_irq_replay_sink(struct dc_link *link)
+{
+	union dpcd_replay_configuration replay_configuration;
+	/*AMD Replay version reuse DP_PSR_ERROR_STATUS for REPLAY_ERROR status.*/
+	union psr_error_status replay_error_status;
+
+	if (!link->replay_settings.replay_feature_enabled)
+		return false;
+
+	dm_helpers_dp_read_dpcd(
+		link->ctx,
+		link,
+		DP_SINK_PR_REPLAY_STATUS,
+		&replay_configuration.raw,
+		sizeof(replay_configuration.raw));
+
+	dm_helpers_dp_read_dpcd(
+		link->ctx,
+		link,
+		DP_PSR_ERROR_STATUS,
+		&replay_error_status.raw,
+		sizeof(replay_error_status.raw));
+
+	link->replay_settings.config.replay_error_status.bits.LINK_CRC_ERROR =
+		replay_error_status.bits.LINK_CRC_ERROR;
+	link->replay_settings.config.replay_error_status.bits.DESYNC_ERROR =
+		replay_configuration.bits.DESYNC_ERROR_STATUS;
+	link->replay_settings.config.replay_error_status.bits.STATE_TRANSITION_ERROR =
+		replay_configuration.bits.STATE_TRANSITION_ERROR_STATUS;
+
+	if (link->replay_settings.config.replay_error_status.bits.LINK_CRC_ERROR ||
+		link->replay_settings.config.replay_error_status.bits.DESYNC_ERROR ||
+		link->replay_settings.config.replay_error_status.bits.STATE_TRANSITION_ERROR) {
+		bool allow_active;
+
+		/* Acknowledge and clear configuration bits */
+		dm_helpers_dp_write_dpcd(
+			link->ctx,
+			link,
+			DP_SINK_PR_REPLAY_STATUS,
+			&replay_configuration.raw,
+			sizeof(replay_configuration.raw));
+
+		/* Acknowledge and clear error bits */
+		dm_helpers_dp_write_dpcd(
+			link->ctx,
+			link,
+			DP_PSR_ERROR_STATUS,/*DpcdAddress_REPLAY_Error_Status*/
+			&replay_error_status.raw,
+			sizeof(replay_error_status.raw));
+
+		/* Replay error, disable and re-enable Replay */
+		if (link->replay_settings.replay_allow_active) {
+			allow_active = false;
+			edp_set_replay_allow_active(link, &allow_active, true, false, NULL);
+			allow_active = true;
+			edp_set_replay_allow_active(link, &allow_active, true, false, NULL);
+		}
+	}
+	return true;
+}
+
+void dp_handle_link_loss(struct dc_link *link)
+{
+	struct pipe_ctx *pipes[MAX_PIPES];
+	struct dc_state *state = link->dc->current_state;
+	uint8_t count;
+	int i;
+
+	link_get_master_pipes_with_dpms_on(link, state, &count, pipes);
+
+	for (i = 0; i < count; i++)
+		link_set_dpms_off(pipes[i]);
+
+	for (i = count - 1; i >= 0; i--) {
+		// Always use max settings here for DP 1.4a LL Compliance CTS
+		if (link->is_automated) {
+			pipes[i]->link_config.dp_link_settings.lane_count =
+					link->verified_link_cap.lane_count;
+			pipes[i]->link_config.dp_link_settings.link_rate =
+					link->verified_link_cap.link_rate;
+			pipes[i]->link_config.dp_link_settings.link_spread =
+					link->verified_link_cap.link_spread;
+		}
+		link_set_dpms_on(link->dc->current_state, pipes[i]);
+	}
+}
+
+static void read_dpcd204h_on_irq_hpd(struct dc_link *link, union hpd_irq_data *irq_data)
+{
+	enum dc_status retval;
+	union lane_align_status_updated dpcd_lane_status_updated;
+
+	retval = core_link_read_dpcd(
+			link,
+			DP_LANE_ALIGN_STATUS_UPDATED,
+			&dpcd_lane_status_updated.raw,
+			sizeof(union lane_align_status_updated));
+
+	if (retval == DC_OK) {
+		irq_data->bytes.lane_status_updated.bits.EQ_INTERLANE_ALIGN_DONE_128b_132b =
+				dpcd_lane_status_updated.bits.EQ_INTERLANE_ALIGN_DONE_128b_132b;
+		irq_data->bytes.lane_status_updated.bits.CDS_INTERLANE_ALIGN_DONE_128b_132b =
+				dpcd_lane_status_updated.bits.CDS_INTERLANE_ALIGN_DONE_128b_132b;
+	}
+}
+
+enum dc_status dp_read_hpd_rx_irq_data(
+	struct dc_link *link,
+	union hpd_irq_data *irq_data)
+{
+	static enum dc_status retval;
+
+	/* The HW reads 16 bytes from 200h on HPD,
+	 * but if we get an AUX_DEFER, the HW cannot retry
+	 * and this causes the CTS tests 4.3.2.1 - 3.2.4 to
+	 * fail, so we now explicitly read 6 bytes which is
+	 * the req from the above mentioned test cases.
+	 *
+	 * For DP 1.4 we need to read those from 2002h range.
+	 */
+	if (link->dpcd_caps.dpcd_rev.raw < DPCD_REV_14)
+		retval = core_link_read_dpcd(
+			link,
+			DP_SINK_COUNT,
+			irq_data->raw,
+			sizeof(union hpd_irq_data));
+	else {
+		/* Read 14 bytes in a single read and then copy only the required fields.
+		 * This is more efficient than doing it in two separate AUX reads. */
+
+		uint8_t tmp[DP_SINK_STATUS_ESI - DP_SINK_COUNT_ESI + 1];
+
+		retval = core_link_read_dpcd(
+			link,
+			DP_SINK_COUNT_ESI,
+			tmp,
+			sizeof(tmp));
+
+		if (retval != DC_OK)
+			return retval;
+
+		irq_data->bytes.sink_cnt.raw = tmp[DP_SINK_COUNT_ESI - DP_SINK_COUNT_ESI];
+		irq_data->bytes.device_service_irq.raw = tmp[DP_DEVICE_SERVICE_IRQ_VECTOR_ESI0 - DP_SINK_COUNT_ESI];
+		irq_data->bytes.lane01_status.raw = tmp[DP_LANE0_1_STATUS_ESI - DP_SINK_COUNT_ESI];
+		irq_data->bytes.lane23_status.raw = tmp[DP_LANE2_3_STATUS_ESI - DP_SINK_COUNT_ESI];
+		irq_data->bytes.lane_status_updated.raw = tmp[DP_LANE_ALIGN_STATUS_UPDATED_ESI - DP_SINK_COUNT_ESI];
+		irq_data->bytes.sink_status.raw = tmp[DP_SINK_STATUS_ESI - DP_SINK_COUNT_ESI];
+
+		/*
+		 * This display doesn't have correct values in DPCD200Eh.
+		 * Read and check DPCD204h instead.
+		 */
+		if (link->wa_flags.read_dpcd204h_on_irq_hpd)
+			read_dpcd204h_on_irq_hpd(link, irq_data);
+	}
+
+	return retval;
+}
+
+/*************************Short Pulse IRQ***************************/
+bool dp_should_allow_hpd_rx_irq(const struct dc_link *link)
+{
+	/*
+	 * Don't handle RX IRQ unless one of following is met:
+	 * 1) The link is established (cur_link_settings != unknown)
+	 * 2) We know we're dealing with a branch device, SST or MST
+	 */
+
+	if ((link->cur_link_settings.lane_count != LANE_COUNT_UNKNOWN) ||
+		is_dp_branch_device(link))
+		return true;
+
+	return false;
+}
+
+bool dp_handle_hpd_rx_irq(struct dc_link *link,
+		union hpd_irq_data *out_hpd_irq_dpcd_data, bool *out_link_loss,
+		bool defer_handling, bool *has_left_work)
+{
+	union hpd_irq_data hpd_irq_dpcd_data = {0};
+	union device_service_irq device_service_clear = {0};
+	enum dc_status result;
+	bool status = false;
+
+	if (out_link_loss)
+		*out_link_loss = false;
+
+	if (has_left_work)
+		*has_left_work = false;
+	/* For use cases related to down stream connection status change,
+	 * PSR and device auto test, refer to function handle_sst_hpd_irq
+	 * in DAL2.1*/
+
+	DC_LOG_HW_HPD_IRQ("%s: Got short pulse HPD on link %d\n",
+		__func__, link->link_index);
+
+
+	 /* All the "handle_hpd_irq_xxx()" methods
+		 * should be called only after
+		 * dal_dpsst_ls_read_hpd_irq_data
+		 * Order of calls is important too
+		 */
+	result = dp_read_hpd_rx_irq_data(link, &hpd_irq_dpcd_data);
+	if (out_hpd_irq_dpcd_data)
+		*out_hpd_irq_dpcd_data = hpd_irq_dpcd_data;
+
+	if (result != DC_OK) {
+		DC_LOG_HW_HPD_IRQ("%s: DPCD read failed to obtain irq data\n",
+			__func__);
+		return false;
+	}
+
+	if (hpd_irq_dpcd_data.bytes.device_service_irq.bits.AUTOMATED_TEST) {
+		// Workaround for DP 1.4a LL Compliance CTS as USB4 has to share encoders unlike DP and USBC
+		link->is_automated = true;
+		device_service_clear.bits.AUTOMATED_TEST = 1;
+		core_link_write_dpcd(
+			link,
+			DP_DEVICE_SERVICE_IRQ_VECTOR,
+			&device_service_clear.raw,
+			sizeof(device_service_clear.raw));
+		device_service_clear.raw = 0;
+		if (defer_handling && has_left_work)
+			*has_left_work = true;
+		else
+			dc_link_dp_handle_automated_test(link);
+		return false;
+	}
+
+	if (!dp_should_allow_hpd_rx_irq(link)) {
+		DC_LOG_HW_HPD_IRQ("%s: skipping HPD handling on %d\n",
+			__func__, link->link_index);
+		return false;
+	}
+
+	if (handle_hpd_irq_psr_sink(link))
+		/* PSR-related error was detected and handled */
+		return true;
+
+	if (handle_hpd_irq_replay_sink(link))
+		/* Replay-related error was detected and handled */
+		return true;
+
+	/* If PSR-related error handled, Main link may be off,
+	 * so do not handle as a normal sink status change interrupt.
+	 */
+
+	if (hpd_irq_dpcd_data.bytes.device_service_irq.bits.UP_REQ_MSG_RDY) {
+		if (defer_handling && has_left_work)
+			*has_left_work = true;
+		return true;
+	}
+
+	/* check if we have MST msg and return since we poll for it */
+	if (hpd_irq_dpcd_data.bytes.device_service_irq.bits.DOWN_REP_MSG_RDY) {
+		if (defer_handling && has_left_work)
+			*has_left_work = true;
+		return false;
+	}
+
+	/* For now we only handle 'Downstream port status' case.
+	 * If we got sink count changed it means
+	 * Downstream port status changed,
+	 * then DM should call DC to do the detection.
+	 * NOTE: Do not handle link loss on eDP since it is internal link*/
+	if ((link->connector_signal != SIGNAL_TYPE_EDP) &&
+			dp_parse_link_loss_status(
+					link,
+					&hpd_irq_dpcd_data)) {
+		/* Connectivity log: link loss */
+		CONN_DATA_LINK_LOSS(link,
+					hpd_irq_dpcd_data.raw,
+					sizeof(hpd_irq_dpcd_data),
+					"Status: ");
+
+		if (defer_handling && has_left_work)
+			*has_left_work = true;
+		else
+			dp_handle_link_loss(link);
+
+		status = false;
+		if (out_link_loss)
+			*out_link_loss = true;
+
+		dp_trace_link_loss_increment(link);
+	}
+
+	if (link->type == dc_connection_sst_branch &&
+		hpd_irq_dpcd_data.bytes.sink_cnt.bits.SINK_COUNT
+			!= link->dpcd_sink_count)
+		status = true;
+
+	/* reasons for HPD RX:
+	 * 1. Link Loss - ie Re-train the Link
+	 * 2. MST sideband message
+	 * 3. Automated Test - ie. Internal Commit
+	 * 4. CP (copy protection) - (not interesting for DM???)
+	 * 5. DRR
+	 * 6. Downstream Port status changed
+	 * -ie. Detect - this the only one
+	 * which is interesting for DM because
+	 * it must call dc_link_detect.
+	 */
+	return status;
+}
diff --git a/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_irq_handler.h b/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_irq_handler.h
new file mode 100644
index 000000000..ac33730fe
--- /dev/null
+++ b/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_irq_handler.h
@@ -0,0 +1,41 @@
+/*
+ * Copyright 2022 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 __DC_LINK_DP_IRQ_HANDLER_H__
+#define __DC_LINK_DP_IRQ_HANDLER_H__
+
+#include "link.h"
+bool dp_parse_link_loss_status(
+	struct dc_link *link,
+	union hpd_irq_data *hpd_irq_dpcd_data);
+bool dp_should_allow_hpd_rx_irq(const struct dc_link *link);
+void dp_handle_link_loss(struct dc_link *link);
+enum dc_status dp_read_hpd_rx_irq_data(
+	struct dc_link *link,
+	union hpd_irq_data *irq_data);
+bool dp_handle_hpd_rx_irq(struct dc_link *link,
+		union hpd_irq_data *out_hpd_irq_dpcd_data, bool *out_link_loss,
+		bool defer_handling, bool *has_left_work);
+#endif /* __DC_LINK_DP_IRQ_HANDLER_H__ */
diff --git a/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_phy.c b/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_phy.c
new file mode 100644
index 000000000..0050e0a06
--- /dev/null
+++ b/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_phy.c
@@ -0,0 +1,209 @@
+/*
+ * Copyright 2022 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
+ *
+ */
+
+/* FILE POLICY AND INTENDED USAGE:
+ * This file implements basic dp phy functionality such as enable/disable phy
+ * output and set lane/drive settings. This file is responsible for maintaining
+ * and update software state representing current phy status such as current
+ * link settings.
+ */
+
+#include "link_dp_phy.h"
+#include "link_dpcd.h"
+#include "link_dp_training.h"
+#include "link_dp_capability.h"
+#include "clk_mgr.h"
+#include "resource.h"
+#include "link_enc_cfg.h"
+#define DC_LOGGER \
+	link->ctx->logger
+
+void dpcd_write_rx_power_ctrl(struct dc_link *link, bool on)
+{
+	uint8_t state;
+
+	state = on ? DP_POWER_STATE_D0 : DP_POWER_STATE_D3;
+
+	if (link->sync_lt_in_progress)
+		return;
+
+	core_link_write_dpcd(link, DP_SET_POWER, &state,
+						 sizeof(state));
+
+}
+
+void dp_enable_link_phy(
+	struct dc_link *link,
+	const struct link_resource *link_res,
+	enum signal_type signal,
+	enum clock_source_id clock_source,
+	const struct dc_link_settings *link_settings)
+{
+	link->cur_link_settings = *link_settings;
+	link->dc->hwss.enable_dp_link_output(link, link_res, signal,
+			clock_source, link_settings);
+	dpcd_write_rx_power_ctrl(link, true);
+}
+
+void dp_disable_link_phy(struct dc_link *link,
+		const struct link_resource *link_res,
+		enum signal_type signal)
+{
+	struct dc  *dc = link->ctx->dc;
+
+	if (!link->wa_flags.dp_keep_receiver_powered &&
+		!link->skip_implict_edp_power_control)
+		dpcd_write_rx_power_ctrl(link, false);
+
+	dc->hwss.disable_link_output(link, link_res, signal);
+	/* Clear current link setting.*/
+	memset(&link->cur_link_settings, 0,
+			sizeof(link->cur_link_settings));
+
+	if (dc->clk_mgr->funcs->notify_link_rate_change)
+		dc->clk_mgr->funcs->notify_link_rate_change(dc->clk_mgr, link);
+}
+
+static inline bool is_immediate_downstream(struct dc_link *link, uint32_t offset)
+{
+	return (dp_parse_lttpr_repeater_count(link->dpcd_caps.lttpr_caps.phy_repeater_cnt) ==
+			offset);
+}
+
+void dp_set_hw_lane_settings(
+	struct dc_link *link,
+	const struct link_resource *link_res,
+	const struct link_training_settings *link_settings,
+	uint32_t offset)
+{
+	const struct link_hwss *link_hwss = get_link_hwss(link, link_res);
+
+	if ((link_settings->lttpr_mode == LTTPR_MODE_NON_TRANSPARENT) &&
+			!is_immediate_downstream(link, offset))
+		return;
+
+	if (link_hwss->ext.set_dp_lane_settings)
+		link_hwss->ext.set_dp_lane_settings(link, link_res,
+				&link_settings->link_settings,
+				link_settings->hw_lane_settings);
+
+	memmove(link->cur_lane_setting,
+			link_settings->hw_lane_settings,
+			sizeof(link->cur_lane_setting));
+}
+
+void dp_set_drive_settings(
+	struct dc_link *link,
+	const struct link_resource *link_res,
+	struct link_training_settings *lt_settings)
+{
+	/* program ASIC PHY settings*/
+	dp_set_hw_lane_settings(link, link_res, lt_settings, DPRX);
+
+	dp_hw_to_dpcd_lane_settings(lt_settings,
+			lt_settings->hw_lane_settings,
+			lt_settings->dpcd_lane_settings);
+
+	/* Notify DP sink the PHY settings from source */
+	dpcd_set_lane_settings(link, lt_settings, DPRX);
+}
+
+enum dc_status dp_set_fec_ready(struct dc_link *link, const struct link_resource *link_res, bool ready)
+{
+	/* FEC has to be "set ready" before the link training.
+	 * The policy is to always train with FEC
+	 * if the sink supports it and leave it enabled on link.
+	 * If FEC is not supported, disable it.
+	 */
+	struct link_encoder *link_enc = NULL;
+	enum dc_status status = DC_OK;
+	uint8_t fec_config = 0;
+
+	link_enc = link_enc_cfg_get_link_enc(link);
+	ASSERT(link_enc);
+
+	if (!dp_should_enable_fec(link))
+		return status;
+
+	if (link_enc->funcs->fec_set_ready &&
+			link->dpcd_caps.fec_cap.bits.FEC_CAPABLE) {
+		if (ready) {
+			fec_config = 1;
+			status = core_link_write_dpcd(link,
+					DP_FEC_CONFIGURATION,
+					&fec_config,
+					sizeof(fec_config));
+			if (status == DC_OK) {
+				link_enc->funcs->fec_set_ready(link_enc, true);
+				link->fec_state = dc_link_fec_ready;
+			} else {
+				link_enc->funcs->fec_set_ready(link_enc, false);
+				link->fec_state = dc_link_fec_not_ready;
+				dm_error("dpcd write failed to set fec_ready");
+			}
+		} else if (link->fec_state == dc_link_fec_ready) {
+			fec_config = 0;
+			status = core_link_write_dpcd(link,
+					DP_FEC_CONFIGURATION,
+					&fec_config,
+					sizeof(fec_config));
+			link_enc->funcs->fec_set_ready(link_enc, false);
+			link->fec_state = dc_link_fec_not_ready;
+		}
+	}
+
+	return status;
+}
+
+void dp_set_fec_enable(struct dc_link *link, bool enable)
+{
+	struct link_encoder *link_enc = NULL;
+
+	link_enc = link_enc_cfg_get_link_enc(link);
+	ASSERT(link_enc);
+
+	if (!dp_should_enable_fec(link))
+		return;
+
+	if (link_enc->funcs->fec_set_enable &&
+			link->dpcd_caps.fec_cap.bits.FEC_CAPABLE) {
+		if (link->fec_state == dc_link_fec_ready && enable) {
+			/* Accord to DP spec, FEC enable sequence can first
+			 * be transmitted anytime after 1000 LL codes have
+			 * been transmitted on the link after link training
+			 * completion. Using 1 lane RBR should have the maximum
+			 * time for transmitting 1000 LL codes which is 6.173 us.
+			 * So use 7 microseconds delay instead.
+			 */
+			udelay(7);
+			link_enc->funcs->fec_set_enable(link_enc, true);
+			link->fec_state = dc_link_fec_enabled;
+		} else if (link->fec_state == dc_link_fec_enabled && !enable) {
+			link_enc->funcs->fec_set_enable(link_enc, false);
+			link->fec_state = dc_link_fec_ready;
+		}
+	}
+}
+
diff --git a/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_phy.h b/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_phy.h
new file mode 100644
index 000000000..1eb0619d6
--- /dev/null
+++ b/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_phy.h
@@ -0,0 +1,59 @@
+/*
+ * Copyright 2022 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 __DC_LINK_DP_PHY_H__
+#define __DC_LINK_DP_PHY_H__
+
+#include "link.h"
+void dp_enable_link_phy(
+	struct dc_link *link,
+	const struct link_resource *link_res,
+	enum signal_type signal,
+	enum clock_source_id clock_source,
+	const struct dc_link_settings *link_settings);
+
+void dp_disable_link_phy(struct dc_link *link,
+		const struct link_resource *link_res,
+		enum signal_type signal);
+
+void dp_set_hw_lane_settings(
+		struct dc_link *link,
+		const struct link_resource *link_res,
+		const struct link_training_settings *link_settings,
+		uint32_t offset);
+
+void dp_set_drive_settings(
+	struct dc_link *link,
+	const struct link_resource *link_res,
+	struct link_training_settings *lt_settings);
+
+enum dc_status dp_set_fec_ready(struct dc_link *link,
+		const struct link_resource *link_res, bool ready);
+
+void dp_set_fec_enable(struct dc_link *link, bool enable);
+
+void dpcd_write_rx_power_ctrl(struct dc_link *link, bool on);
+
+#endif /* __DC_LINK_DP_PHY_H__ */
diff --git a/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_training.c b/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_training.c
new file mode 100644
index 000000000..5a0b04518
--- /dev/null
+++ b/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_training.c
@@ -0,0 +1,1732 @@
+/*
+ * Copyright 2022 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
+ *
+ */
+
+/* FILE POLICY AND INTENDED USAGE:
+ * This file implements all generic dp link training helper functions and top
+ * level generic training sequence. All variations of dp link training sequence
+ * should be called inside the top level training functions in this file to
+ * ensure the integrity of our overall training procedure across different types
+ * of link encoding and back end hardware.
+ */
+#include "link_dp_training.h"
+#include "link_dp_training_8b_10b.h"
+#include "link_dp_training_128b_132b.h"
+#include "link_dp_training_auxless.h"
+#include "link_dp_training_dpia.h"
+#include "link_dp_training_fixed_vs_pe_retimer.h"
+#include "link_dpcd.h"
+#include "link/accessories/link_dp_trace.h"
+#include "link_dp_phy.h"
+#include "link_dp_capability.h"
+#include "link_edp_panel_control.h"
+#include "link/link_detection.h"
+#include "link/link_validation.h"
+#include "atomfirmware.h"
+#include "link_enc_cfg.h"
+#include "resource.h"
+#include "dm_helpers.h"
+
+#define DC_LOGGER \
+	link->ctx->logger
+
+#define POST_LT_ADJ_REQ_LIMIT 6
+#define POST_LT_ADJ_REQ_TIMEOUT 200
+#define LINK_TRAINING_RETRY_DELAY 50 /* ms */
+
+void dp_log_training_result(
+	struct dc_link *link,
+	const struct link_training_settings *lt_settings,
+	enum link_training_result status)
+{
+	char *link_rate = "Unknown";
+	char *lt_result = "Unknown";
+	char *lt_spread = "Disabled";
+
+	switch (lt_settings->link_settings.link_rate) {
+	case LINK_RATE_LOW:
+		link_rate = "RBR";
+		break;
+	case LINK_RATE_RATE_2:
+		link_rate = "R2";
+		break;
+	case LINK_RATE_RATE_3:
+		link_rate = "R3";
+		break;
+	case LINK_RATE_HIGH:
+		link_rate = "HBR";
+		break;
+	case LINK_RATE_RBR2:
+		link_rate = "RBR2";
+		break;
+	case LINK_RATE_RATE_6:
+		link_rate = "R6";
+		break;
+	case LINK_RATE_HIGH2:
+		link_rate = "HBR2";
+		break;
+	case LINK_RATE_RATE_8:
+		link_rate = "R8";
+		break;
+	case LINK_RATE_HIGH3:
+		link_rate = "HBR3";
+		break;
+	case LINK_RATE_UHBR10:
+		link_rate = "UHBR10";
+		break;
+	case LINK_RATE_UHBR13_5:
+		link_rate = "UHBR13.5";
+		break;
+	case LINK_RATE_UHBR20:
+		link_rate = "UHBR20";
+		break;
+	default:
+		break;
+	}
+
+	switch (status) {
+	case LINK_TRAINING_SUCCESS:
+		lt_result = "pass";
+		break;
+	case LINK_TRAINING_CR_FAIL_LANE0:
+		lt_result = "CR failed lane0";
+		break;
+	case LINK_TRAINING_CR_FAIL_LANE1:
+		lt_result = "CR failed lane1";
+		break;
+	case LINK_TRAINING_CR_FAIL_LANE23:
+		lt_result = "CR failed lane23";
+		break;
+	case LINK_TRAINING_EQ_FAIL_CR:
+		lt_result = "CR failed in EQ";
+		break;
+	case LINK_TRAINING_EQ_FAIL_CR_PARTIAL:
+		lt_result = "CR failed in EQ partially";
+		break;
+	case LINK_TRAINING_EQ_FAIL_EQ:
+		lt_result = "EQ failed";
+		break;
+	case LINK_TRAINING_LQA_FAIL:
+		lt_result = "LQA failed";
+		break;
+	case LINK_TRAINING_LINK_LOSS:
+		lt_result = "Link loss";
+		break;
+	case DP_128b_132b_LT_FAILED:
+		lt_result = "LT_FAILED received";
+		break;
+	case DP_128b_132b_MAX_LOOP_COUNT_REACHED:
+		lt_result = "max loop count reached";
+		break;
+	case DP_128b_132b_CHANNEL_EQ_DONE_TIMEOUT:
+		lt_result = "channel EQ timeout";
+		break;
+	case DP_128b_132b_CDS_DONE_TIMEOUT:
+		lt_result = "CDS timeout";
+		break;
+	default:
+		break;
+	}
+
+	switch (lt_settings->link_settings.link_spread) {
+	case LINK_SPREAD_DISABLED:
+		lt_spread = "Disabled";
+		break;
+	case LINK_SPREAD_05_DOWNSPREAD_30KHZ:
+		lt_spread = "0.5% 30KHz";
+		break;
+	case LINK_SPREAD_05_DOWNSPREAD_33KHZ:
+		lt_spread = "0.5% 33KHz";
+		break;
+	default:
+		break;
+	}
+
+	/* Connectivity log: link training */
+
+	/* TODO - DP2.0 Log: add connectivity log for FFE PRESET */
+
+	CONN_MSG_LT(link, "%sx%d %s VS=%d, PE=%d, DS=%s",
+				link_rate,
+				lt_settings->link_settings.lane_count,
+				lt_result,
+				lt_settings->hw_lane_settings[0].VOLTAGE_SWING,
+				lt_settings->hw_lane_settings[0].PRE_EMPHASIS,
+				lt_spread);
+}
+
+uint8_t dp_initialize_scrambling_data_symbols(
+	struct dc_link *link,
+	enum dc_dp_training_pattern pattern)
+{
+	uint8_t disable_scrabled_data_symbols = 0;
+
+	switch (pattern) {
+	case DP_TRAINING_PATTERN_SEQUENCE_1:
+	case DP_TRAINING_PATTERN_SEQUENCE_2:
+	case DP_TRAINING_PATTERN_SEQUENCE_3:
+		disable_scrabled_data_symbols = 1;
+		break;
+	case DP_TRAINING_PATTERN_SEQUENCE_4:
+	case DP_128b_132b_TPS1:
+	case DP_128b_132b_TPS2:
+		disable_scrabled_data_symbols = 0;
+		break;
+	default:
+		ASSERT(0);
+		DC_LOG_HW_LINK_TRAINING("%s: Invalid HW Training pattern: %d\n",
+			__func__, pattern);
+		break;
+	}
+	return disable_scrabled_data_symbols;
+}
+
+enum dpcd_training_patterns
+	dp_training_pattern_to_dpcd_training_pattern(
+	struct dc_link *link,
+	enum dc_dp_training_pattern pattern)
+{
+	enum dpcd_training_patterns dpcd_tr_pattern =
+	DPCD_TRAINING_PATTERN_VIDEOIDLE;
+
+	switch (pattern) {
+	case DP_TRAINING_PATTERN_SEQUENCE_1:
+		DC_LOG_HW_LINK_TRAINING("%s: Using DP training pattern TPS1\n", __func__);
+		dpcd_tr_pattern = DPCD_TRAINING_PATTERN_1;
+		break;
+	case DP_TRAINING_PATTERN_SEQUENCE_2:
+		DC_LOG_HW_LINK_TRAINING("%s: Using DP training pattern TPS2\n", __func__);
+		dpcd_tr_pattern = DPCD_TRAINING_PATTERN_2;
+		break;
+	case DP_TRAINING_PATTERN_SEQUENCE_3:
+		DC_LOG_HW_LINK_TRAINING("%s: Using DP training pattern TPS3\n", __func__);
+		dpcd_tr_pattern = DPCD_TRAINING_PATTERN_3;
+		break;
+	case DP_TRAINING_PATTERN_SEQUENCE_4:
+		DC_LOG_HW_LINK_TRAINING("%s: Using DP training pattern TPS4\n", __func__);
+		dpcd_tr_pattern = DPCD_TRAINING_PATTERN_4;
+		break;
+	case DP_128b_132b_TPS1:
+		DC_LOG_HW_LINK_TRAINING("%s: Using DP 128b/132b training pattern TPS1\n", __func__);
+		dpcd_tr_pattern = DPCD_128b_132b_TPS1;
+		break;
+	case DP_128b_132b_TPS2:
+		DC_LOG_HW_LINK_TRAINING("%s: Using DP 128b/132b training pattern TPS2\n", __func__);
+		dpcd_tr_pattern = DPCD_128b_132b_TPS2;
+		break;
+	case DP_128b_132b_TPS2_CDS:
+		DC_LOG_HW_LINK_TRAINING("%s: Using DP 128b/132b training pattern TPS2 CDS\n",
+					__func__);
+		dpcd_tr_pattern = DPCD_128b_132b_TPS2_CDS;
+		break;
+	case DP_TRAINING_PATTERN_VIDEOIDLE:
+		DC_LOG_HW_LINK_TRAINING("%s: Using DP training pattern videoidle\n", __func__);
+		dpcd_tr_pattern = DPCD_TRAINING_PATTERN_VIDEOIDLE;
+		break;
+	default:
+		ASSERT(0);
+		DC_LOG_HW_LINK_TRAINING("%s: Invalid HW Training pattern: %d\n",
+			__func__, pattern);
+		break;
+	}
+
+	return dpcd_tr_pattern;
+}
+
+uint8_t dp_get_nibble_at_index(const uint8_t *buf,
+	uint32_t index)
+{
+	uint8_t nibble;
+	nibble = buf[index / 2];
+
+	if (index % 2)
+		nibble >>= 4;
+	else
+		nibble &= 0x0F;
+
+	return nibble;
+}
+
+void dp_wait_for_training_aux_rd_interval(
+	struct dc_link *link,
+	uint32_t wait_in_micro_secs)
+{
+	fsleep(wait_in_micro_secs);
+
+	DC_LOG_HW_LINK_TRAINING("%s:\n wait = %d\n",
+		__func__,
+		wait_in_micro_secs);
+}
+
+/* maximum pre emphasis level allowed for each voltage swing level*/
+static const enum dc_pre_emphasis voltage_swing_to_pre_emphasis[] = {
+		PRE_EMPHASIS_LEVEL3,
+		PRE_EMPHASIS_LEVEL2,
+		PRE_EMPHASIS_LEVEL1,
+		PRE_EMPHASIS_DISABLED };
+
+static enum dc_pre_emphasis get_max_pre_emphasis_for_voltage_swing(
+	enum dc_voltage_swing voltage)
+{
+	enum dc_pre_emphasis pre_emphasis;
+	pre_emphasis = PRE_EMPHASIS_MAX_LEVEL;
+
+	if (voltage <= VOLTAGE_SWING_MAX_LEVEL)
+		pre_emphasis = voltage_swing_to_pre_emphasis[voltage];
+
+	return pre_emphasis;
+
+}
+
+static void maximize_lane_settings(const struct link_training_settings *lt_settings,
+		struct dc_lane_settings lane_settings[LANE_COUNT_DP_MAX])
+{
+	uint32_t lane;
+	struct dc_lane_settings max_requested;
+
+	max_requested.VOLTAGE_SWING = lane_settings[0].VOLTAGE_SWING;
+	max_requested.PRE_EMPHASIS = lane_settings[0].PRE_EMPHASIS;
+	max_requested.FFE_PRESET = lane_settings[0].FFE_PRESET;
+
+	/* Determine what the maximum of the requested settings are*/
+	for (lane = 1; lane < lt_settings->link_settings.lane_count; lane++) {
+		if (lane_settings[lane].VOLTAGE_SWING > max_requested.VOLTAGE_SWING)
+			max_requested.VOLTAGE_SWING = lane_settings[lane].VOLTAGE_SWING;
+
+		if (lane_settings[lane].PRE_EMPHASIS > max_requested.PRE_EMPHASIS)
+			max_requested.PRE_EMPHASIS = lane_settings[lane].PRE_EMPHASIS;
+		if (lane_settings[lane].FFE_PRESET.settings.level >
+				max_requested.FFE_PRESET.settings.level)
+			max_requested.FFE_PRESET.settings.level =
+					lane_settings[lane].FFE_PRESET.settings.level;
+	}
+
+	/* make sure the requested settings are
+	 * not higher than maximum settings*/
+	if (max_requested.VOLTAGE_SWING > VOLTAGE_SWING_MAX_LEVEL)
+		max_requested.VOLTAGE_SWING = VOLTAGE_SWING_MAX_LEVEL;
+
+	if (max_requested.PRE_EMPHASIS > PRE_EMPHASIS_MAX_LEVEL)
+		max_requested.PRE_EMPHASIS = PRE_EMPHASIS_MAX_LEVEL;
+	if (max_requested.FFE_PRESET.settings.level > DP_FFE_PRESET_MAX_LEVEL)
+		max_requested.FFE_PRESET.settings.level = DP_FFE_PRESET_MAX_LEVEL;
+
+	/* make sure the pre-emphasis matches the voltage swing*/
+	if (max_requested.PRE_EMPHASIS >
+		get_max_pre_emphasis_for_voltage_swing(
+			max_requested.VOLTAGE_SWING))
+		max_requested.PRE_EMPHASIS =
+		get_max_pre_emphasis_for_voltage_swing(
+			max_requested.VOLTAGE_SWING);
+
+	for (lane = 0; lane < LANE_COUNT_DP_MAX; lane++) {
+		lane_settings[lane].VOLTAGE_SWING = max_requested.VOLTAGE_SWING;
+		lane_settings[lane].PRE_EMPHASIS = max_requested.PRE_EMPHASIS;
+		lane_settings[lane].FFE_PRESET = max_requested.FFE_PRESET;
+	}
+}
+
+void dp_hw_to_dpcd_lane_settings(
+		const struct link_training_settings *lt_settings,
+		const struct dc_lane_settings hw_lane_settings[LANE_COUNT_DP_MAX],
+		union dpcd_training_lane dpcd_lane_settings[LANE_COUNT_DP_MAX])
+{
+	uint8_t lane = 0;
+
+	for (lane = 0; lane < LANE_COUNT_DP_MAX; lane++) {
+		if (link_dp_get_encoding_format(&lt_settings->link_settings) ==
+				DP_8b_10b_ENCODING) {
+			dpcd_lane_settings[lane].bits.VOLTAGE_SWING_SET =
+					(uint8_t)(hw_lane_settings[lane].VOLTAGE_SWING);
+			dpcd_lane_settings[lane].bits.PRE_EMPHASIS_SET =
+					(uint8_t)(hw_lane_settings[lane].PRE_EMPHASIS);
+			dpcd_lane_settings[lane].bits.MAX_SWING_REACHED =
+					(hw_lane_settings[lane].VOLTAGE_SWING ==
+							VOLTAGE_SWING_MAX_LEVEL ? 1 : 0);
+			dpcd_lane_settings[lane].bits.MAX_PRE_EMPHASIS_REACHED =
+					(hw_lane_settings[lane].PRE_EMPHASIS ==
+							PRE_EMPHASIS_MAX_LEVEL ? 1 : 0);
+		} else if (link_dp_get_encoding_format(&lt_settings->link_settings) ==
+				DP_128b_132b_ENCODING) {
+			dpcd_lane_settings[lane].tx_ffe.PRESET_VALUE =
+					hw_lane_settings[lane].FFE_PRESET.settings.level;
+		}
+	}
+}
+
+uint8_t get_dpcd_link_rate(const struct dc_link_settings *link_settings)
+{
+	uint8_t link_rate = 0;
+	enum dp_link_encoding encoding = link_dp_get_encoding_format(link_settings);
+
+	if (encoding == DP_128b_132b_ENCODING)
+		switch (link_settings->link_rate) {
+		case LINK_RATE_UHBR10:
+			link_rate = 0x1;
+			break;
+		case LINK_RATE_UHBR20:
+			link_rate = 0x2;
+			break;
+		case LINK_RATE_UHBR13_5:
+			link_rate = 0x4;
+			break;
+		default:
+			link_rate = 0;
+			break;
+		}
+	else if (encoding == DP_8b_10b_ENCODING)
+		link_rate = (uint8_t) link_settings->link_rate;
+	else
+		link_rate = 0;
+
+	return link_rate;
+}
+
+/* Only used for channel equalization */
+uint32_t dp_translate_training_aux_read_interval(uint32_t dpcd_aux_read_interval)
+{
+	unsigned int aux_rd_interval_us = 400;
+
+	switch (dpcd_aux_read_interval) {
+	case 0x01:
+		aux_rd_interval_us = 4000;
+		break;
+	case 0x02:
+		aux_rd_interval_us = 8000;
+		break;
+	case 0x03:
+		aux_rd_interval_us = 12000;
+		break;
+	case 0x04:
+		aux_rd_interval_us = 16000;
+		break;
+	case 0x05:
+		aux_rd_interval_us = 32000;
+		break;
+	case 0x06:
+		aux_rd_interval_us = 64000;
+		break;
+	default:
+		break;
+	}
+
+	return aux_rd_interval_us;
+}
+
+enum link_training_result dp_get_cr_failure(enum dc_lane_count ln_count,
+					union lane_status *dpcd_lane_status)
+{
+	enum link_training_result result = LINK_TRAINING_SUCCESS;
+
+	if (ln_count >= LANE_COUNT_ONE && !dpcd_lane_status[0].bits.CR_DONE_0)
+		result = LINK_TRAINING_CR_FAIL_LANE0;
+	else if (ln_count >= LANE_COUNT_TWO && !dpcd_lane_status[1].bits.CR_DONE_0)
+		result = LINK_TRAINING_CR_FAIL_LANE1;
+	else if (ln_count >= LANE_COUNT_FOUR && !dpcd_lane_status[2].bits.CR_DONE_0)
+		result = LINK_TRAINING_CR_FAIL_LANE23;
+	else if (ln_count >= LANE_COUNT_FOUR && !dpcd_lane_status[3].bits.CR_DONE_0)
+		result = LINK_TRAINING_CR_FAIL_LANE23;
+	return result;
+}
+
+bool is_repeater(const struct link_training_settings *lt_settings, uint32_t offset)
+{
+	return (lt_settings->lttpr_mode == LTTPR_MODE_NON_TRANSPARENT) && (offset != 0);
+}
+
+bool dp_is_max_vs_reached(
+	const struct link_training_settings *lt_settings)
+{
+	uint32_t lane;
+	for (lane = 0; lane <
+		(uint32_t)(lt_settings->link_settings.lane_count);
+		lane++) {
+		if (lt_settings->dpcd_lane_settings[lane].bits.VOLTAGE_SWING_SET
+			== VOLTAGE_SWING_MAX_LEVEL)
+			return true;
+	}
+	return false;
+
+}
+
+bool dp_is_cr_done(enum dc_lane_count ln_count,
+	union lane_status *dpcd_lane_status)
+{
+	bool done = true;
+	uint32_t lane;
+	/*LANEx_CR_DONE bits All 1's?*/
+	for (lane = 0; lane < (uint32_t)(ln_count); lane++) {
+		if (!dpcd_lane_status[lane].bits.CR_DONE_0)
+			done = false;
+	}
+	return done;
+
+}
+
+bool dp_is_ch_eq_done(enum dc_lane_count ln_count,
+		union lane_status *dpcd_lane_status)
+{
+	bool done = true;
+	uint32_t lane;
+	for (lane = 0; lane < (uint32_t)(ln_count); lane++)
+		if (!dpcd_lane_status[lane].bits.CHANNEL_EQ_DONE_0)
+			done = false;
+	return done;
+}
+
+bool dp_is_symbol_locked(enum dc_lane_count ln_count,
+		union lane_status *dpcd_lane_status)
+{
+	bool locked = true;
+	uint32_t lane;
+	for (lane = 0; lane < (uint32_t)(ln_count); lane++)
+		if (!dpcd_lane_status[lane].bits.SYMBOL_LOCKED_0)
+			locked = false;
+	return locked;
+}
+
+bool dp_is_interlane_aligned(union lane_align_status_updated align_status)
+{
+	return align_status.bits.INTERLANE_ALIGN_DONE == 1;
+}
+
+enum link_training_result dp_check_link_loss_status(
+	struct dc_link *link,
+	const struct link_training_settings *link_training_setting)
+{
+	enum link_training_result status = LINK_TRAINING_SUCCESS;
+	union lane_status lane_status;
+	uint8_t dpcd_buf[6] = {0};
+	uint32_t lane;
+
+	core_link_read_dpcd(
+			link,
+			DP_SINK_COUNT,
+			(uint8_t *)(dpcd_buf),
+			sizeof(dpcd_buf));
+
+	/*parse lane status*/
+	for (lane = 0; lane < link->cur_link_settings.lane_count; lane++) {
+		/*
+		 * check lanes status
+		 */
+		lane_status.raw = dp_get_nibble_at_index(&dpcd_buf[2], lane);
+
+		if (!lane_status.bits.CHANNEL_EQ_DONE_0 ||
+			!lane_status.bits.CR_DONE_0 ||
+			!lane_status.bits.SYMBOL_LOCKED_0) {
+			/* if one of the channel equalization, clock
+			 * recovery or symbol lock is dropped
+			 * consider it as (link has been
+			 * dropped) dp sink status has changed
+			 */
+			status = LINK_TRAINING_LINK_LOSS;
+			break;
+		}
+	}
+
+	return status;
+}
+
+enum dc_status dp_get_lane_status_and_lane_adjust(
+	struct dc_link *link,
+	const struct link_training_settings *link_training_setting,
+	union lane_status ln_status[LANE_COUNT_DP_MAX],
+	union lane_align_status_updated *ln_align,
+	union lane_adjust ln_adjust[LANE_COUNT_DP_MAX],
+	uint32_t offset)
+{
+	unsigned int lane01_status_address = DP_LANE0_1_STATUS;
+	uint8_t lane_adjust_offset = 4;
+	unsigned int lane01_adjust_address;
+	uint8_t dpcd_buf[6] = {0};
+	uint32_t lane;
+	enum dc_status status;
+
+	if (is_repeater(link_training_setting, offset)) {
+		lane01_status_address =
+				DP_LANE0_1_STATUS_PHY_REPEATER1 +
+				((DP_REPEATER_CONFIGURATION_AND_STATUS_SIZE) * (offset - 1));
+		lane_adjust_offset = 3;
+	}
+
+	status = core_link_read_dpcd(
+		link,
+		lane01_status_address,
+		(uint8_t *)(dpcd_buf),
+		sizeof(dpcd_buf));
+
+	if (status != DC_OK) {
+		DC_LOG_HW_LINK_TRAINING("%s:\n Failed to read from address 0x%X,"
+			" keep current lane status and lane adjust unchanged",
+			__func__,
+			lane01_status_address);
+		return status;
+	}
+
+	for (lane = 0; lane <
+		(uint32_t)(link_training_setting->link_settings.lane_count);
+		lane++) {
+
+		ln_status[lane].raw =
+			dp_get_nibble_at_index(&dpcd_buf[0], lane);
+		ln_adjust[lane].raw =
+			dp_get_nibble_at_index(&dpcd_buf[lane_adjust_offset], lane);
+	}
+
+	ln_align->raw = dpcd_buf[2];
+
+	if (is_repeater(link_training_setting, offset)) {
+		DC_LOG_HW_LINK_TRAINING("%s:\n LTTPR Repeater ID: %d\n"
+				" 0x%X Lane01Status = %x\n 0x%X Lane23Status = %x\n ",
+			__func__,
+			offset,
+			lane01_status_address, dpcd_buf[0],
+			lane01_status_address + 1, dpcd_buf[1]);
+
+		lane01_adjust_address = DP_ADJUST_REQUEST_LANE0_1_PHY_REPEATER1 +
+				((DP_REPEATER_CONFIGURATION_AND_STATUS_SIZE) * (offset - 1));
+
+		DC_LOG_HW_LINK_TRAINING("%s:\n LTTPR Repeater ID: %d\n"
+				" 0x%X Lane01AdjustRequest = %x\n 0x%X Lane23AdjustRequest = %x\n",
+					__func__,
+					offset,
+					lane01_adjust_address,
+					dpcd_buf[lane_adjust_offset],
+					lane01_adjust_address + 1,
+					dpcd_buf[lane_adjust_offset + 1]);
+	} else {
+		DC_LOG_HW_LINK_TRAINING("%s:\n 0x%X Lane01Status = %x\n 0x%X Lane23Status = %x\n ",
+			__func__,
+			lane01_status_address, dpcd_buf[0],
+			lane01_status_address + 1, dpcd_buf[1]);
+
+		lane01_adjust_address = DP_ADJUST_REQUEST_LANE0_1;
+
+		DC_LOG_HW_LINK_TRAINING("%s:\n 0x%X Lane01AdjustRequest = %x\n 0x%X Lane23AdjustRequest = %x\n",
+			__func__,
+			lane01_adjust_address,
+			dpcd_buf[lane_adjust_offset],
+			lane01_adjust_address + 1,
+			dpcd_buf[lane_adjust_offset + 1]);
+	}
+
+	return status;
+}
+
+static void override_lane_settings(const struct link_training_settings *lt_settings,
+		struct dc_lane_settings lane_settings[LANE_COUNT_DP_MAX])
+{
+	uint32_t lane;
+
+	if (lt_settings->voltage_swing == NULL &&
+			lt_settings->pre_emphasis == NULL &&
+			lt_settings->ffe_preset == NULL &&
+			lt_settings->post_cursor2 == NULL)
+
+		return;
+
+	for (lane = 0; lane < LANE_COUNT_DP_MAX; lane++) {
+		if (lt_settings->voltage_swing)
+			lane_settings[lane].VOLTAGE_SWING = *lt_settings->voltage_swing;
+		if (lt_settings->pre_emphasis)
+			lane_settings[lane].PRE_EMPHASIS = *lt_settings->pre_emphasis;
+		if (lt_settings->post_cursor2)
+			lane_settings[lane].POST_CURSOR2 = *lt_settings->post_cursor2;
+		if (lt_settings->ffe_preset)
+			lane_settings[lane].FFE_PRESET = *lt_settings->ffe_preset;
+	}
+}
+
+void dp_get_lttpr_mode_override(struct dc_link *link, enum lttpr_mode *override)
+{
+	if (!dp_is_lttpr_present(link))
+		return;
+
+	if (link->dc->debug.lttpr_mode_override == LTTPR_MODE_TRANSPARENT) {
+		*override = LTTPR_MODE_TRANSPARENT;
+	} else if (link->dc->debug.lttpr_mode_override == LTTPR_MODE_NON_TRANSPARENT) {
+		*override = LTTPR_MODE_NON_TRANSPARENT;
+	} else if (link->dc->debug.lttpr_mode_override == LTTPR_MODE_NON_LTTPR) {
+		*override = LTTPR_MODE_NON_LTTPR;
+	}
+	DC_LOG_DC("lttpr_mode_override chose LTTPR_MODE = %d\n", (uint8_t)(*override));
+}
+
+void override_training_settings(
+		struct dc_link *link,
+		const struct dc_link_training_overrides *overrides,
+		struct link_training_settings *lt_settings)
+{
+	uint32_t lane;
+
+	/* Override link spread */
+	if (!link->dp_ss_off && overrides->downspread != NULL)
+		lt_settings->link_settings.link_spread = *overrides->downspread ?
+				LINK_SPREAD_05_DOWNSPREAD_30KHZ
+				: LINK_SPREAD_DISABLED;
+
+	/* Override lane settings */
+	if (overrides->voltage_swing != NULL)
+		lt_settings->voltage_swing = overrides->voltage_swing;
+	if (overrides->pre_emphasis != NULL)
+		lt_settings->pre_emphasis = overrides->pre_emphasis;
+	if (overrides->post_cursor2 != NULL)
+		lt_settings->post_cursor2 = overrides->post_cursor2;
+	if (overrides->ffe_preset != NULL)
+		lt_settings->ffe_preset = overrides->ffe_preset;
+	/* Override HW lane settings with BIOS forced values if present */
+	if ((link->chip_caps & EXT_DISPLAY_PATH_CAPS__DP_FIXED_VS_EN) &&
+			lt_settings->lttpr_mode == LTTPR_MODE_TRANSPARENT) {
+		lt_settings->voltage_swing = &link->bios_forced_drive_settings.VOLTAGE_SWING;
+		lt_settings->pre_emphasis = &link->bios_forced_drive_settings.PRE_EMPHASIS;
+		lt_settings->always_match_dpcd_with_hw_lane_settings = false;
+	}
+	for (lane = 0; lane < LANE_COUNT_DP_MAX; lane++) {
+		lt_settings->hw_lane_settings[lane].VOLTAGE_SWING =
+			lt_settings->voltage_swing != NULL ?
+			*lt_settings->voltage_swing :
+			VOLTAGE_SWING_LEVEL0;
+		lt_settings->hw_lane_settings[lane].PRE_EMPHASIS =
+			lt_settings->pre_emphasis != NULL ?
+			*lt_settings->pre_emphasis
+			: PRE_EMPHASIS_DISABLED;
+		lt_settings->hw_lane_settings[lane].POST_CURSOR2 =
+			lt_settings->post_cursor2 != NULL ?
+			*lt_settings->post_cursor2
+			: POST_CURSOR2_DISABLED;
+	}
+
+	if (lt_settings->always_match_dpcd_with_hw_lane_settings)
+		dp_hw_to_dpcd_lane_settings(lt_settings,
+				lt_settings->hw_lane_settings, lt_settings->dpcd_lane_settings);
+
+	/* Override training timings */
+	if (overrides->cr_pattern_time != NULL)
+		lt_settings->cr_pattern_time = *overrides->cr_pattern_time;
+	if (overrides->eq_pattern_time != NULL)
+		lt_settings->eq_pattern_time = *overrides->eq_pattern_time;
+	if (overrides->pattern_for_cr != NULL)
+		lt_settings->pattern_for_cr = *overrides->pattern_for_cr;
+	if (overrides->pattern_for_eq != NULL)
+		lt_settings->pattern_for_eq = *overrides->pattern_for_eq;
+	if (overrides->enhanced_framing != NULL)
+		lt_settings->enhanced_framing = *overrides->enhanced_framing;
+	if (link->preferred_training_settings.fec_enable != NULL)
+		lt_settings->should_set_fec_ready = *link->preferred_training_settings.fec_enable;
+
+	/* Check DP tunnel LTTPR mode debug option. */
+	if (link->ep_type == DISPLAY_ENDPOINT_USB4_DPIA && link->dc->debug.dpia_debug.bits.force_non_lttpr)
+		lt_settings->lttpr_mode = LTTPR_MODE_NON_LTTPR;
+
+	dp_get_lttpr_mode_override(link, &lt_settings->lttpr_mode);
+
+}
+
+enum dc_dp_training_pattern decide_cr_training_pattern(
+		const struct dc_link_settings *link_settings)
+{
+	switch (link_dp_get_encoding_format(link_settings)) {
+	case DP_8b_10b_ENCODING:
+	default:
+		return DP_TRAINING_PATTERN_SEQUENCE_1;
+	case DP_128b_132b_ENCODING:
+		return DP_128b_132b_TPS1;
+	}
+}
+
+enum dc_dp_training_pattern decide_eq_training_pattern(struct dc_link *link,
+		const struct dc_link_settings *link_settings)
+{
+	struct link_encoder *link_enc;
+	struct encoder_feature_support *enc_caps;
+	struct dpcd_caps *rx_caps = &link->dpcd_caps;
+	enum dc_dp_training_pattern pattern = DP_TRAINING_PATTERN_SEQUENCE_2;
+
+	link_enc = link_enc_cfg_get_link_enc(link);
+	ASSERT(link_enc);
+	enc_caps = &link_enc->features;
+
+	switch (link_dp_get_encoding_format(link_settings)) {
+	case DP_8b_10b_ENCODING:
+		if (enc_caps->flags.bits.IS_TPS4_CAPABLE &&
+				rx_caps->max_down_spread.bits.TPS4_SUPPORTED)
+			pattern = DP_TRAINING_PATTERN_SEQUENCE_4;
+		else if (enc_caps->flags.bits.IS_TPS3_CAPABLE &&
+				rx_caps->max_ln_count.bits.TPS3_SUPPORTED)
+			pattern = DP_TRAINING_PATTERN_SEQUENCE_3;
+		else
+			pattern = DP_TRAINING_PATTERN_SEQUENCE_2;
+		break;
+	case DP_128b_132b_ENCODING:
+		pattern = DP_128b_132b_TPS2;
+		break;
+	default:
+		pattern = DP_TRAINING_PATTERN_SEQUENCE_2;
+		break;
+	}
+	return pattern;
+}
+
+enum lttpr_mode dp_decide_lttpr_mode(struct dc_link *link,
+		struct dc_link_settings *link_setting)
+{
+	enum dp_link_encoding encoding = link_dp_get_encoding_format(link_setting);
+
+	if (encoding == DP_8b_10b_ENCODING)
+		return dp_decide_8b_10b_lttpr_mode(link);
+	else if (encoding == DP_128b_132b_ENCODING)
+		return dp_decide_128b_132b_lttpr_mode(link);
+
+	ASSERT(0);
+	return LTTPR_MODE_NON_LTTPR;
+}
+
+void dp_decide_lane_settings(
+		const struct link_training_settings *lt_settings,
+		const union lane_adjust ln_adjust[LANE_COUNT_DP_MAX],
+		struct dc_lane_settings hw_lane_settings[LANE_COUNT_DP_MAX],
+		union dpcd_training_lane *dpcd_lane_settings)
+{
+	uint32_t lane;
+
+	for (lane = 0; lane < LANE_COUNT_DP_MAX; lane++) {
+		if (link_dp_get_encoding_format(&lt_settings->link_settings) ==
+				DP_8b_10b_ENCODING) {
+			hw_lane_settings[lane].VOLTAGE_SWING =
+					(enum dc_voltage_swing)(ln_adjust[lane].bits.
+							VOLTAGE_SWING_LANE);
+			hw_lane_settings[lane].PRE_EMPHASIS =
+					(enum dc_pre_emphasis)(ln_adjust[lane].bits.
+							PRE_EMPHASIS_LANE);
+		} else if (link_dp_get_encoding_format(&lt_settings->link_settings) ==
+				DP_128b_132b_ENCODING) {
+			hw_lane_settings[lane].FFE_PRESET.raw =
+					ln_adjust[lane].tx_ffe.PRESET_VALUE;
+		}
+	}
+	dp_hw_to_dpcd_lane_settings(lt_settings, hw_lane_settings, dpcd_lane_settings);
+
+	if (lt_settings->disallow_per_lane_settings) {
+		/* we find the maximum of the requested settings across all lanes*/
+		/* and set this maximum for all lanes*/
+		maximize_lane_settings(lt_settings, hw_lane_settings);
+		override_lane_settings(lt_settings, hw_lane_settings);
+
+		if (lt_settings->always_match_dpcd_with_hw_lane_settings)
+			dp_hw_to_dpcd_lane_settings(lt_settings, hw_lane_settings, dpcd_lane_settings);
+	}
+
+}
+
+void dp_decide_training_settings(
+		struct dc_link *link,
+		const struct dc_link_settings *link_settings,
+		struct link_training_settings *lt_settings)
+{
+	if (link_dp_get_encoding_format(link_settings) == DP_8b_10b_ENCODING)
+		decide_8b_10b_training_settings(link, link_settings, lt_settings);
+	else if (link_dp_get_encoding_format(link_settings) == DP_128b_132b_ENCODING)
+		decide_128b_132b_training_settings(link, link_settings, lt_settings);
+}
+
+
+enum dc_status configure_lttpr_mode_transparent(struct dc_link *link)
+{
+	uint8_t repeater_mode = DP_PHY_REPEATER_MODE_TRANSPARENT;
+
+	DC_LOG_HW_LINK_TRAINING("%s\n Set LTTPR to Transparent Mode\n", __func__);
+	return core_link_write_dpcd(link,
+			DP_PHY_REPEATER_MODE,
+			(uint8_t *)&repeater_mode,
+			sizeof(repeater_mode));
+}
+
+static enum dc_status configure_lttpr_mode_non_transparent(
+		struct dc_link *link,
+		const struct link_training_settings *lt_settings)
+{
+	/* aux timeout is already set to extended */
+	/* RESET/SET lttpr mode to enable non transparent mode */
+	uint8_t repeater_cnt;
+	uint32_t aux_interval_address;
+	uint8_t repeater_id;
+	enum dc_status result = DC_ERROR_UNEXPECTED;
+	uint8_t repeater_mode = DP_PHY_REPEATER_MODE_TRANSPARENT;
+	const struct dc *dc = link->dc;
+
+	enum dp_link_encoding encoding = dc->link_srv->dp_get_encoding_format(&lt_settings->link_settings);
+
+	if (encoding == DP_8b_10b_ENCODING) {
+		DC_LOG_HW_LINK_TRAINING("%s\n Set LTTPR to Transparent Mode\n", __func__);
+		result = core_link_write_dpcd(link,
+				DP_PHY_REPEATER_MODE,
+				(uint8_t *)&repeater_mode,
+				sizeof(repeater_mode));
+
+	}
+
+	if (result == DC_OK) {
+		link->dpcd_caps.lttpr_caps.mode = repeater_mode;
+	}
+
+	if (lt_settings->lttpr_mode == LTTPR_MODE_NON_TRANSPARENT) {
+
+		DC_LOG_HW_LINK_TRAINING("%s\n Set LTTPR to Non Transparent Mode\n", __func__);
+
+		repeater_mode = DP_PHY_REPEATER_MODE_NON_TRANSPARENT;
+		result = core_link_write_dpcd(link,
+				DP_PHY_REPEATER_MODE,
+				(uint8_t *)&repeater_mode,
+				sizeof(repeater_mode));
+
+		if (result == DC_OK) {
+			link->dpcd_caps.lttpr_caps.mode = repeater_mode;
+		}
+
+		if (encoding == DP_8b_10b_ENCODING) {
+			repeater_cnt = dp_parse_lttpr_repeater_count(link->dpcd_caps.lttpr_caps.phy_repeater_cnt);
+
+			/* Driver does not need to train the first hop. Skip DPCD read and clear
+			 * AUX_RD_INTERVAL for DPTX-to-DPIA hop.
+			 */
+			if (link->ep_type == DISPLAY_ENDPOINT_USB4_DPIA)
+				link->dpcd_caps.lttpr_caps.aux_rd_interval[--repeater_cnt] = 0;
+
+			for (repeater_id = repeater_cnt; repeater_id > 0; repeater_id--) {
+				aux_interval_address = DP_TRAINING_AUX_RD_INTERVAL_PHY_REPEATER1 +
+						((DP_REPEATER_CONFIGURATION_AND_STATUS_SIZE) * (repeater_id - 1));
+				core_link_read_dpcd(
+						link,
+						aux_interval_address,
+						(uint8_t *)&link->dpcd_caps.lttpr_caps.aux_rd_interval[repeater_id - 1],
+						sizeof(link->dpcd_caps.lttpr_caps.aux_rd_interval[repeater_id - 1]));
+				link->dpcd_caps.lttpr_caps.aux_rd_interval[repeater_id - 1] &= 0x7F;
+			}
+		}
+	}
+
+	return result;
+}
+
+enum dc_status dpcd_configure_lttpr_mode(struct dc_link *link, struct link_training_settings *lt_settings)
+{
+	enum dc_status status = DC_OK;
+
+	if (lt_settings->lttpr_mode == LTTPR_MODE_TRANSPARENT)
+		status = configure_lttpr_mode_transparent(link);
+
+	else if (lt_settings->lttpr_mode == LTTPR_MODE_NON_TRANSPARENT)
+		status = configure_lttpr_mode_non_transparent(link, lt_settings);
+
+	return status;
+}
+
+void repeater_training_done(struct dc_link *link, uint32_t offset)
+{
+	union dpcd_training_pattern dpcd_pattern = {0};
+
+	const uint32_t dpcd_base_lt_offset =
+			DP_TRAINING_PATTERN_SET_PHY_REPEATER1 +
+				((DP_REPEATER_CONFIGURATION_AND_STATUS_SIZE) * (offset - 1));
+	/* Set training not in progress*/
+	dpcd_pattern.v1_4.TRAINING_PATTERN_SET = DPCD_TRAINING_PATTERN_VIDEOIDLE;
+
+	core_link_write_dpcd(
+		link,
+		dpcd_base_lt_offset,
+		&dpcd_pattern.raw,
+		1);
+
+	DC_LOG_HW_LINK_TRAINING("%s\n LTTPR Id: %d 0x%X pattern = %x\n",
+		__func__,
+		offset,
+		dpcd_base_lt_offset,
+		dpcd_pattern.v1_4.TRAINING_PATTERN_SET);
+}
+
+static void dpcd_exit_training_mode(struct dc_link *link, enum dp_link_encoding encoding)
+{
+	uint8_t sink_status = 0;
+	uint8_t i;
+
+	/* clear training pattern set */
+	dpcd_set_training_pattern(link, DP_TRAINING_PATTERN_VIDEOIDLE);
+
+	if (encoding == DP_128b_132b_ENCODING) {
+		/* poll for intra-hop disable */
+		for (i = 0; i < 10; i++) {
+			if ((core_link_read_dpcd(link, DP_SINK_STATUS, &sink_status, 1) == DC_OK) &&
+					(sink_status & DP_INTRA_HOP_AUX_REPLY_INDICATION) == 0)
+				break;
+			fsleep(1000);
+		}
+	}
+}
+
+enum dc_status dpcd_configure_channel_coding(struct dc_link *link,
+		struct link_training_settings *lt_settings)
+{
+	enum dp_link_encoding encoding =
+			link_dp_get_encoding_format(
+					&lt_settings->link_settings);
+	enum dc_status status;
+
+	status = core_link_write_dpcd(
+			link,
+			DP_MAIN_LINK_CHANNEL_CODING_SET,
+			(uint8_t *) &encoding,
+			1);
+	DC_LOG_HW_LINK_TRAINING("%s:\n 0x%X MAIN_LINK_CHANNEL_CODING_SET = %x\n",
+					__func__,
+					DP_MAIN_LINK_CHANNEL_CODING_SET,
+					encoding);
+
+	return status;
+}
+
+void dpcd_set_training_pattern(
+	struct dc_link *link,
+	enum dc_dp_training_pattern training_pattern)
+{
+	union dpcd_training_pattern dpcd_pattern = {0};
+
+	dpcd_pattern.v1_4.TRAINING_PATTERN_SET =
+			dp_training_pattern_to_dpcd_training_pattern(
+					link, training_pattern);
+
+	core_link_write_dpcd(
+		link,
+		DP_TRAINING_PATTERN_SET,
+		&dpcd_pattern.raw,
+		1);
+
+	DC_LOG_HW_LINK_TRAINING("%s\n %x pattern = %x\n",
+		__func__,
+		DP_TRAINING_PATTERN_SET,
+		dpcd_pattern.v1_4.TRAINING_PATTERN_SET);
+}
+
+enum dc_status dpcd_set_link_settings(
+	struct dc_link *link,
+	const struct link_training_settings *lt_settings)
+{
+	uint8_t rate;
+	enum dc_status status;
+
+	union down_spread_ctrl downspread = {0};
+	union lane_count_set lane_count_set = {0};
+
+	downspread.raw = (uint8_t)
+	(lt_settings->link_settings.link_spread);
+
+	lane_count_set.bits.LANE_COUNT_SET =
+	lt_settings->link_settings.lane_count;
+
+	lane_count_set.bits.ENHANCED_FRAMING = lt_settings->enhanced_framing;
+	lane_count_set.bits.POST_LT_ADJ_REQ_GRANTED = 0;
+
+
+	if (link->ep_type == DISPLAY_ENDPOINT_PHY &&
+			lt_settings->pattern_for_eq < DP_TRAINING_PATTERN_SEQUENCE_4) {
+		lane_count_set.bits.POST_LT_ADJ_REQ_GRANTED =
+				link->dpcd_caps.max_ln_count.bits.POST_LT_ADJ_REQ_SUPPORTED;
+	}
+
+	status = core_link_write_dpcd(link, DP_DOWNSPREAD_CTRL,
+		&downspread.raw, sizeof(downspread));
+
+	status = core_link_write_dpcd(link, DP_LANE_COUNT_SET,
+		&lane_count_set.raw, 1);
+
+	if (link->dpcd_caps.dpcd_rev.raw >= DPCD_REV_13 &&
+			lt_settings->link_settings.use_link_rate_set == true) {
+		rate = 0;
+		/* WA for some MUX chips that will power down with eDP and lose supported
+		 * link rate set for eDP 1.4. Source reads DPCD 0x010 again to ensure
+		 * MUX chip gets link rate set back before link training.
+		 */
+		if (link->connector_signal == SIGNAL_TYPE_EDP) {
+			uint8_t supported_link_rates[16];
+
+			core_link_read_dpcd(link, DP_SUPPORTED_LINK_RATES,
+					supported_link_rates, sizeof(supported_link_rates));
+		}
+		status = core_link_write_dpcd(link, DP_LINK_BW_SET, &rate, 1);
+		status = core_link_write_dpcd(link, DP_LINK_RATE_SET,
+				&lt_settings->link_settings.link_rate_set, 1);
+	} else {
+		rate = get_dpcd_link_rate(&lt_settings->link_settings);
+
+		status = core_link_write_dpcd(link, DP_LINK_BW_SET, &rate, 1);
+	}
+
+	if (rate) {
+		DC_LOG_HW_LINK_TRAINING("%s\n %x rate = %x\n %x lane = %x framing = %x\n %x spread = %x\n",
+			__func__,
+			DP_LINK_BW_SET,
+			lt_settings->link_settings.link_rate,
+			DP_LANE_COUNT_SET,
+			lt_settings->link_settings.lane_count,
+			lt_settings->enhanced_framing,
+			DP_DOWNSPREAD_CTRL,
+			lt_settings->link_settings.link_spread);
+	} else {
+		DC_LOG_HW_LINK_TRAINING("%s\n %x rate set = %x\n %x lane = %x framing = %x\n %x spread = %x\n",
+			__func__,
+			DP_LINK_RATE_SET,
+			lt_settings->link_settings.link_rate_set,
+			DP_LANE_COUNT_SET,
+			lt_settings->link_settings.lane_count,
+			lt_settings->enhanced_framing,
+			DP_DOWNSPREAD_CTRL,
+			lt_settings->link_settings.link_spread);
+	}
+
+	return status;
+}
+
+enum dc_status dpcd_set_lane_settings(
+	struct dc_link *link,
+	const struct link_training_settings *link_training_setting,
+	uint32_t offset)
+{
+	unsigned int lane0_set_address;
+	enum dc_status status;
+	lane0_set_address = DP_TRAINING_LANE0_SET;
+
+	if (is_repeater(link_training_setting, offset))
+		lane0_set_address = DP_TRAINING_LANE0_SET_PHY_REPEATER1 +
+		((DP_REPEATER_CONFIGURATION_AND_STATUS_SIZE) * (offset - 1));
+
+	status = core_link_write_dpcd(link,
+		lane0_set_address,
+		(uint8_t *)(link_training_setting->dpcd_lane_settings),
+		link_training_setting->link_settings.lane_count);
+
+	if (is_repeater(link_training_setting, offset)) {
+		DC_LOG_HW_LINK_TRAINING("%s\n LTTPR Repeater ID: %d\n"
+				" 0x%X VS set = %x  PE set = %x max VS Reached = %x  max PE Reached = %x\n",
+			__func__,
+			offset,
+			lane0_set_address,
+			link_training_setting->dpcd_lane_settings[0].bits.VOLTAGE_SWING_SET,
+			link_training_setting->dpcd_lane_settings[0].bits.PRE_EMPHASIS_SET,
+			link_training_setting->dpcd_lane_settings[0].bits.MAX_SWING_REACHED,
+			link_training_setting->dpcd_lane_settings[0].bits.MAX_PRE_EMPHASIS_REACHED);
+
+	} else {
+		DC_LOG_HW_LINK_TRAINING("%s\n 0x%X VS set = %x  PE set = %x max VS Reached = %x  max PE Reached = %x\n",
+			__func__,
+			lane0_set_address,
+			link_training_setting->dpcd_lane_settings[0].bits.VOLTAGE_SWING_SET,
+			link_training_setting->dpcd_lane_settings[0].bits.PRE_EMPHASIS_SET,
+			link_training_setting->dpcd_lane_settings[0].bits.MAX_SWING_REACHED,
+			link_training_setting->dpcd_lane_settings[0].bits.MAX_PRE_EMPHASIS_REACHED);
+	}
+
+	return status;
+}
+
+void dpcd_set_lt_pattern_and_lane_settings(
+	struct dc_link *link,
+	const struct link_training_settings *lt_settings,
+	enum dc_dp_training_pattern pattern,
+	uint32_t offset)
+{
+	uint32_t dpcd_base_lt_offset;
+	uint8_t dpcd_lt_buffer[5] = {0};
+	union dpcd_training_pattern dpcd_pattern = {0};
+	uint32_t size_in_bytes;
+	bool edp_workaround = false; /* TODO link_prop.INTERNAL */
+	dpcd_base_lt_offset = DP_TRAINING_PATTERN_SET;
+
+	if (is_repeater(lt_settings, offset))
+		dpcd_base_lt_offset = DP_TRAINING_PATTERN_SET_PHY_REPEATER1 +
+			((DP_REPEATER_CONFIGURATION_AND_STATUS_SIZE) * (offset - 1));
+
+	/*****************************************************************
+	* DpcdAddress_TrainingPatternSet
+	*****************************************************************/
+	dpcd_pattern.v1_4.TRAINING_PATTERN_SET =
+		dp_training_pattern_to_dpcd_training_pattern(link, pattern);
+
+	dpcd_pattern.v1_4.SCRAMBLING_DISABLE =
+		dp_initialize_scrambling_data_symbols(link, pattern);
+
+	dpcd_lt_buffer[DP_TRAINING_PATTERN_SET - DP_TRAINING_PATTERN_SET]
+		= dpcd_pattern.raw;
+
+	if (is_repeater(lt_settings, offset)) {
+		DC_LOG_HW_LINK_TRAINING("%s\n LTTPR Repeater ID: %d\n 0x%X pattern = %x\n",
+			__func__,
+			offset,
+			dpcd_base_lt_offset,
+			dpcd_pattern.v1_4.TRAINING_PATTERN_SET);
+	} else {
+		DC_LOG_HW_LINK_TRAINING("%s\n 0x%X pattern = %x\n",
+			__func__,
+			dpcd_base_lt_offset,
+			dpcd_pattern.v1_4.TRAINING_PATTERN_SET);
+	}
+
+	/* concatenate everything into one buffer*/
+	size_in_bytes = lt_settings->link_settings.lane_count *
+			sizeof(lt_settings->dpcd_lane_settings[0]);
+
+	 // 0x00103 - 0x00102
+	memmove(
+		&dpcd_lt_buffer[DP_TRAINING_LANE0_SET - DP_TRAINING_PATTERN_SET],
+		lt_settings->dpcd_lane_settings,
+		size_in_bytes);
+
+	if (is_repeater(lt_settings, offset)) {
+		if (link_dp_get_encoding_format(&lt_settings->link_settings) ==
+				DP_128b_132b_ENCODING)
+			DC_LOG_HW_LINK_TRAINING("%s:\n LTTPR Repeater ID: %d\n"
+					" 0x%X TX_FFE_PRESET_VALUE = %x\n",
+					__func__,
+					offset,
+					dpcd_base_lt_offset,
+					lt_settings->dpcd_lane_settings[0].tx_ffe.PRESET_VALUE);
+		else if (link_dp_get_encoding_format(&lt_settings->link_settings) ==
+				DP_8b_10b_ENCODING)
+		DC_LOG_HW_LINK_TRAINING("%s:\n LTTPR Repeater ID: %d\n"
+				" 0x%X VS set = %x PE set = %x max VS Reached = %x  max PE Reached = %x\n",
+			__func__,
+			offset,
+			dpcd_base_lt_offset,
+			lt_settings->dpcd_lane_settings[0].bits.VOLTAGE_SWING_SET,
+			lt_settings->dpcd_lane_settings[0].bits.PRE_EMPHASIS_SET,
+			lt_settings->dpcd_lane_settings[0].bits.MAX_SWING_REACHED,
+			lt_settings->dpcd_lane_settings[0].bits.MAX_PRE_EMPHASIS_REACHED);
+	} else {
+		if (link_dp_get_encoding_format(&lt_settings->link_settings) ==
+				DP_128b_132b_ENCODING)
+			DC_LOG_HW_LINK_TRAINING("%s:\n 0x%X TX_FFE_PRESET_VALUE = %x\n",
+					__func__,
+					dpcd_base_lt_offset,
+					lt_settings->dpcd_lane_settings[0].tx_ffe.PRESET_VALUE);
+		else if (link_dp_get_encoding_format(&lt_settings->link_settings) ==
+				DP_8b_10b_ENCODING)
+			DC_LOG_HW_LINK_TRAINING("%s:\n 0x%X VS set = %x  PE set = %x max VS Reached = %x  max PE Reached = %x\n",
+					__func__,
+					dpcd_base_lt_offset,
+					lt_settings->dpcd_lane_settings[0].bits.VOLTAGE_SWING_SET,
+					lt_settings->dpcd_lane_settings[0].bits.PRE_EMPHASIS_SET,
+					lt_settings->dpcd_lane_settings[0].bits.MAX_SWING_REACHED,
+					lt_settings->dpcd_lane_settings[0].bits.MAX_PRE_EMPHASIS_REACHED);
+	}
+	if (edp_workaround) {
+		/* for eDP write in 2 parts because the 5-byte burst is
+		* causing issues on some eDP panels (EPR#366724)
+		*/
+		core_link_write_dpcd(
+			link,
+			DP_TRAINING_PATTERN_SET,
+			&dpcd_pattern.raw,
+			sizeof(dpcd_pattern.raw));
+
+		core_link_write_dpcd(
+			link,
+			DP_TRAINING_LANE0_SET,
+			(uint8_t *)(lt_settings->dpcd_lane_settings),
+			size_in_bytes);
+
+	} else if (link_dp_get_encoding_format(&lt_settings->link_settings) ==
+			DP_128b_132b_ENCODING) {
+		core_link_write_dpcd(
+				link,
+				dpcd_base_lt_offset,
+				dpcd_lt_buffer,
+				sizeof(dpcd_lt_buffer));
+	} else
+		/* write it all in (1 + number-of-lanes)-byte burst*/
+		core_link_write_dpcd(
+				link,
+				dpcd_base_lt_offset,
+				dpcd_lt_buffer,
+				size_in_bytes + sizeof(dpcd_pattern.raw));
+}
+
+void start_clock_recovery_pattern_early(struct dc_link *link,
+		const struct link_resource *link_res,
+		struct link_training_settings *lt_settings,
+		uint32_t offset)
+{
+	DC_LOG_HW_LINK_TRAINING("%s\n GPU sends TPS1. Wait 400us.\n",
+			__func__);
+	dp_set_hw_training_pattern(link, link_res, lt_settings->pattern_for_cr, offset);
+	dp_set_hw_lane_settings(link, link_res, lt_settings, offset);
+	udelay(400);
+}
+
+void dp_set_hw_test_pattern(
+	struct dc_link *link,
+	const struct link_resource *link_res,
+	enum dp_test_pattern test_pattern,
+	uint8_t *custom_pattern,
+	uint32_t custom_pattern_size)
+{
+	const struct link_hwss *link_hwss = get_link_hwss(link, link_res);
+	struct encoder_set_dp_phy_pattern_param pattern_param = {0};
+
+	pattern_param.dp_phy_pattern = test_pattern;
+	pattern_param.custom_pattern = custom_pattern;
+	pattern_param.custom_pattern_size = custom_pattern_size;
+	pattern_param.dp_panel_mode = dp_get_panel_mode(link);
+
+	if (link_hwss->ext.set_dp_link_test_pattern)
+		link_hwss->ext.set_dp_link_test_pattern(link, link_res, &pattern_param);
+}
+
+bool dp_set_hw_training_pattern(
+	struct dc_link *link,
+	const struct link_resource *link_res,
+	enum dc_dp_training_pattern pattern,
+	uint32_t offset)
+{
+	enum dp_test_pattern test_pattern = DP_TEST_PATTERN_UNSUPPORTED;
+
+	switch (pattern) {
+	case DP_TRAINING_PATTERN_SEQUENCE_1:
+		test_pattern = DP_TEST_PATTERN_TRAINING_PATTERN1;
+		break;
+	case DP_TRAINING_PATTERN_SEQUENCE_2:
+		test_pattern = DP_TEST_PATTERN_TRAINING_PATTERN2;
+		break;
+	case DP_TRAINING_PATTERN_SEQUENCE_3:
+		test_pattern = DP_TEST_PATTERN_TRAINING_PATTERN3;
+		break;
+	case DP_TRAINING_PATTERN_SEQUENCE_4:
+		test_pattern = DP_TEST_PATTERN_TRAINING_PATTERN4;
+		break;
+	case DP_128b_132b_TPS1:
+		test_pattern = DP_TEST_PATTERN_128b_132b_TPS1_TRAINING_MODE;
+		break;
+	case DP_128b_132b_TPS2:
+		test_pattern = DP_TEST_PATTERN_128b_132b_TPS2_TRAINING_MODE;
+		break;
+	default:
+		break;
+	}
+
+	dp_set_hw_test_pattern(link, link_res, test_pattern, NULL, 0);
+
+	return true;
+}
+
+static bool perform_post_lt_adj_req_sequence(
+		struct dc_link *link,
+		const struct link_resource *link_res,
+		struct link_training_settings *lt_settings)
+{
+	enum dc_lane_count lane_count =
+	lt_settings->link_settings.lane_count;
+
+	uint32_t adj_req_count;
+	uint32_t adj_req_timer;
+	bool req_drv_setting_changed;
+	uint32_t lane;
+	union lane_status dpcd_lane_status[LANE_COUNT_DP_MAX] = {0};
+	union lane_align_status_updated dpcd_lane_status_updated = {0};
+	union lane_adjust dpcd_lane_adjust[LANE_COUNT_DP_MAX] = {0};
+
+	req_drv_setting_changed = false;
+	for (adj_req_count = 0; adj_req_count < POST_LT_ADJ_REQ_LIMIT;
+	adj_req_count++) {
+
+		req_drv_setting_changed = false;
+
+		for (adj_req_timer = 0;
+			adj_req_timer < POST_LT_ADJ_REQ_TIMEOUT;
+			adj_req_timer++) {
+
+			dp_get_lane_status_and_lane_adjust(
+				link,
+				lt_settings,
+				dpcd_lane_status,
+				&dpcd_lane_status_updated,
+				dpcd_lane_adjust,
+				DPRX);
+
+			if (dpcd_lane_status_updated.bits.
+					POST_LT_ADJ_REQ_IN_PROGRESS == 0)
+				return true;
+
+			if (!dp_is_cr_done(lane_count, dpcd_lane_status))
+				return false;
+
+			if (!dp_is_ch_eq_done(lane_count, dpcd_lane_status) ||
+					!dp_is_symbol_locked(lane_count, dpcd_lane_status) ||
+					!dp_is_interlane_aligned(dpcd_lane_status_updated))
+				return false;
+
+			for (lane = 0; lane < (uint32_t)(lane_count); lane++) {
+
+				if (lt_settings->
+				dpcd_lane_settings[lane].bits.VOLTAGE_SWING_SET !=
+				dpcd_lane_adjust[lane].bits.VOLTAGE_SWING_LANE ||
+				lt_settings->dpcd_lane_settings[lane].bits.PRE_EMPHASIS_SET !=
+				dpcd_lane_adjust[lane].bits.PRE_EMPHASIS_LANE) {
+
+					req_drv_setting_changed = true;
+					break;
+				}
+			}
+
+			if (req_drv_setting_changed) {
+				dp_decide_lane_settings(lt_settings, dpcd_lane_adjust,
+						lt_settings->hw_lane_settings, lt_settings->dpcd_lane_settings);
+
+				dp_set_drive_settings(link,
+						link_res,
+						lt_settings);
+				break;
+			}
+
+			msleep(1);
+		}
+
+		if (!req_drv_setting_changed) {
+			DC_LOG_WARNING("%s: Post Link Training Adjust Request Timed out\n",
+				__func__);
+
+			ASSERT(0);
+			return true;
+		}
+	}
+	DC_LOG_WARNING("%s: Post Link Training Adjust Request limit reached\n",
+		__func__);
+
+	ASSERT(0);
+	return true;
+
+}
+
+static enum link_training_result dp_transition_to_video_idle(
+	struct dc_link *link,
+	const struct link_resource *link_res,
+	struct link_training_settings *lt_settings,
+	enum link_training_result status)
+{
+	union lane_count_set lane_count_set = {0};
+
+	/* 4. mainlink output idle pattern*/
+	dp_set_hw_test_pattern(link, link_res, DP_TEST_PATTERN_VIDEO_MODE, NULL, 0);
+
+	/*
+	 * 5. post training adjust if required
+	 * If the upstream DPTX and downstream DPRX both support TPS4,
+	 * TPS4 must be used instead of POST_LT_ADJ_REQ.
+	 */
+	if (link->dpcd_caps.max_ln_count.bits.POST_LT_ADJ_REQ_SUPPORTED != 1 ||
+			lt_settings->pattern_for_eq >= DP_TRAINING_PATTERN_SEQUENCE_4) {
+		/* delay 5ms after Main Link output idle pattern and then check
+		 * DPCD 0202h.
+		 */
+		if (link->connector_signal != SIGNAL_TYPE_EDP && status == LINK_TRAINING_SUCCESS) {
+			msleep(5);
+			status = dp_check_link_loss_status(link, lt_settings);
+		}
+		return status;
+	}
+
+	if (status == LINK_TRAINING_SUCCESS &&
+		perform_post_lt_adj_req_sequence(link, link_res, lt_settings) == false)
+		status = LINK_TRAINING_LQA_FAIL;
+
+	lane_count_set.bits.LANE_COUNT_SET = lt_settings->link_settings.lane_count;
+	lane_count_set.bits.ENHANCED_FRAMING = lt_settings->enhanced_framing;
+	lane_count_set.bits.POST_LT_ADJ_REQ_GRANTED = 0;
+
+	core_link_write_dpcd(
+		link,
+		DP_LANE_COUNT_SET,
+		&lane_count_set.raw,
+		sizeof(lane_count_set));
+
+	return status;
+}
+
+enum link_training_result dp_perform_link_training(
+	struct dc_link *link,
+	const struct link_resource *link_res,
+	const struct dc_link_settings *link_settings,
+	bool skip_video_pattern)
+{
+	enum link_training_result status = LINK_TRAINING_SUCCESS;
+	struct link_training_settings lt_settings = {0};
+	enum dp_link_encoding encoding =
+			link_dp_get_encoding_format(link_settings);
+
+	/* decide training settings */
+	dp_decide_training_settings(
+			link,
+			link_settings,
+			&lt_settings);
+
+	override_training_settings(
+			link,
+			&link->preferred_training_settings,
+			&lt_settings);
+
+	/* reset previous training states */
+	dpcd_exit_training_mode(link, encoding);
+
+	/* configure link prior to entering training mode */
+	dpcd_configure_lttpr_mode(link, &lt_settings);
+	dp_set_fec_ready(link, link_res, lt_settings.should_set_fec_ready);
+	dpcd_configure_channel_coding(link, &lt_settings);
+
+	/* enter training mode:
+	 * Per DP specs starting from here, DPTX device shall not issue
+	 * Non-LT AUX transactions inside training mode.
+	 */
+	if ((link->chip_caps & EXT_DISPLAY_PATH_CAPS__DP_FIXED_VS_EN) && encoding == DP_8b_10b_ENCODING)
+		if (link->dc->config.use_old_fixed_vs_sequence)
+			status = dp_perform_fixed_vs_pe_training_sequence_legacy(link, link_res, &lt_settings);
+		else
+			status = dp_perform_fixed_vs_pe_training_sequence(link, link_res, &lt_settings);
+	else if (encoding == DP_8b_10b_ENCODING)
+		status = dp_perform_8b_10b_link_training(link, link_res, &lt_settings);
+	else if (encoding == DP_128b_132b_ENCODING)
+		status = dp_perform_128b_132b_link_training(link, link_res, &lt_settings);
+	else
+		ASSERT(0);
+
+	/* exit training mode */
+	dpcd_exit_training_mode(link, encoding);
+
+	/* switch to video idle */
+	if ((status == LINK_TRAINING_SUCCESS) || !skip_video_pattern)
+		status = dp_transition_to_video_idle(link,
+				link_res,
+				&lt_settings,
+				status);
+
+	/* dump debug data */
+	dp_log_training_result(link, &lt_settings, status);
+	if (status != LINK_TRAINING_SUCCESS)
+		link->ctx->dc->debug_data.ltFailCount++;
+	return status;
+}
+
+bool perform_link_training_with_retries(
+	const struct dc_link_settings *link_setting,
+	bool skip_video_pattern,
+	int attempts,
+	struct pipe_ctx *pipe_ctx,
+	enum signal_type signal,
+	bool do_fallback)
+{
+	int j;
+	uint8_t delay_between_attempts = LINK_TRAINING_RETRY_DELAY;
+	struct dc_stream_state *stream = pipe_ctx->stream;
+	struct dc_link *link = stream->link;
+	enum dp_panel_mode panel_mode = dp_get_panel_mode(link);
+	enum link_training_result status = LINK_TRAINING_CR_FAIL_LANE0;
+	struct dc_link_settings cur_link_settings = *link_setting;
+	struct dc_link_settings max_link_settings = *link_setting;
+	const struct link_hwss *link_hwss = get_link_hwss(link, &pipe_ctx->link_res);
+	int fail_count = 0;
+	bool is_link_bw_low = false; /* link bandwidth < stream bandwidth */
+	bool is_link_bw_min = /* RBR x 1 */
+		(cur_link_settings.link_rate <= LINK_RATE_LOW) &&
+		(cur_link_settings.lane_count <= LANE_COUNT_ONE);
+
+	dp_trace_commit_lt_init(link);
+
+
+	if (link_dp_get_encoding_format(&cur_link_settings) == DP_8b_10b_ENCODING)
+		/* We need to do this before the link training to ensure the idle
+		 * pattern in SST mode will be sent right after the link training
+		 */
+		link_hwss->setup_stream_encoder(pipe_ctx);
+
+	dp_trace_set_lt_start_timestamp(link, false);
+	j = 0;
+	while (j < attempts && fail_count < (attempts * 10)) {
+
+		DC_LOG_HW_LINK_TRAINING("%s: Beginning link(%d) training attempt %u of %d @ rate(%d) x lane(%d) @ spread = %x\n",
+					__func__, link->link_index, (unsigned int)j + 1, attempts,
+				       cur_link_settings.link_rate, cur_link_settings.lane_count,
+				       cur_link_settings.link_spread);
+
+		dp_enable_link_phy(
+			link,
+			&pipe_ctx->link_res,
+			signal,
+			pipe_ctx->clock_source->id,
+			&cur_link_settings);
+
+		if (stream->sink_patches.dppowerup_delay > 0) {
+			int delay_dp_power_up_in_ms = stream->sink_patches.dppowerup_delay;
+
+			msleep(delay_dp_power_up_in_ms);
+		}
+
+		if (panel_mode == DP_PANEL_MODE_EDP) {
+			struct cp_psp *cp_psp = &stream->ctx->cp_psp;
+
+			if (cp_psp && cp_psp->funcs.enable_assr) {
+				/* ASSR is bound to fail with unsigned PSP
+				 * verstage used during devlopment phase.
+				 * Report and continue with eDP panel mode to
+				 * perform eDP link training with right settings
+				 */
+				bool result;
+				result = cp_psp->funcs.enable_assr(cp_psp->handle, link);
+				if (!result && link->panel_mode != DP_PANEL_MODE_EDP)
+					panel_mode = DP_PANEL_MODE_DEFAULT;
+			}
+		}
+
+		dp_set_panel_mode(link, panel_mode);
+
+		if (link->aux_access_disabled) {
+			dp_perform_link_training_skip_aux(link, &pipe_ctx->link_res, &cur_link_settings);
+			return true;
+		} else {
+			/** @todo Consolidate USB4 DP and DPx.x training. */
+			if (link->ep_type == DISPLAY_ENDPOINT_USB4_DPIA) {
+				status = dpia_perform_link_training(
+						link,
+						&pipe_ctx->link_res,
+						&cur_link_settings,
+						skip_video_pattern);
+
+				/* Transmit idle pattern once training successful. */
+				if (status == LINK_TRAINING_SUCCESS && !is_link_bw_low) {
+					dp_set_hw_test_pattern(link, &pipe_ctx->link_res, DP_TEST_PATTERN_VIDEO_MODE, NULL, 0);
+					// Update verified link settings to current one
+					// Because DPIA LT might fallback to lower link setting.
+					if (stream->signal == SIGNAL_TYPE_DISPLAY_PORT_MST) {
+						link->verified_link_cap.link_rate = link->cur_link_settings.link_rate;
+						link->verified_link_cap.lane_count = link->cur_link_settings.lane_count;
+						dm_helpers_dp_mst_update_branch_bandwidth(link->ctx, link);
+					}
+				}
+			} else {
+				status = dp_perform_link_training(
+						link,
+						&pipe_ctx->link_res,
+						&cur_link_settings,
+						skip_video_pattern);
+			}
+
+			dp_trace_lt_total_count_increment(link, false);
+			dp_trace_lt_result_update(link, status, false);
+			dp_trace_set_lt_end_timestamp(link, false);
+			if (status == LINK_TRAINING_SUCCESS && !is_link_bw_low)
+				return true;
+		}
+
+		fail_count++;
+		dp_trace_lt_fail_count_update(link, fail_count, false);
+		if (link->ep_type == DISPLAY_ENDPOINT_PHY) {
+			/* latest link training still fail or link training is aborted
+			 * skip delay and keep PHY on
+			 */
+			if (j == (attempts - 1) || (status == LINK_TRAINING_ABORT))
+				break;
+		}
+
+		if (j == (attempts - 1)) {
+			DC_LOG_WARNING(
+				"%s: Link(%d) training attempt %u of %d failed @ rate(%d) x lane(%d) @ spread = %x : fail reason:(%d)\n",
+				__func__, link->link_index, (unsigned int)j + 1, attempts,
+				cur_link_settings.link_rate, cur_link_settings.lane_count,
+				cur_link_settings.link_spread, status);
+		} else {
+			DC_LOG_HW_LINK_TRAINING(
+				"%s: Link(%d) training attempt %u of %d failed @ rate(%d) x lane(%d) @ spread = %x : fail reason:(%d)\n",
+				__func__, link->link_index, (unsigned int)j + 1, attempts,
+				cur_link_settings.link_rate, cur_link_settings.lane_count,
+				cur_link_settings.link_spread, status);
+		}
+
+		dp_disable_link_phy(link, &pipe_ctx->link_res, signal);
+
+		/* Abort link training if failure due to sink being unplugged. */
+		if (status == LINK_TRAINING_ABORT) {
+			enum dc_connection_type type = dc_connection_none;
+
+			link_detect_connection_type(link, &type);
+			if (type == dc_connection_none) {
+				DC_LOG_HW_LINK_TRAINING("%s: Aborting training because sink unplugged\n", __func__);
+				break;
+			}
+		}
+
+		/* Try to train again at original settings if:
+		 * - not falling back between training attempts;
+		 * - aborted previous attempt due to reasons other than sink unplug;
+		 * - successfully trained but at a link rate lower than that required by stream;
+		 * - reached minimum link bandwidth.
+		 */
+		if (!do_fallback || (status == LINK_TRAINING_ABORT) ||
+				(status == LINK_TRAINING_SUCCESS && is_link_bw_low) ||
+				is_link_bw_min) {
+			j++;
+			cur_link_settings = *link_setting;
+			delay_between_attempts += LINK_TRAINING_RETRY_DELAY;
+			is_link_bw_low = false;
+			is_link_bw_min = (cur_link_settings.link_rate <= LINK_RATE_LOW) &&
+				(cur_link_settings.lane_count <= LANE_COUNT_ONE);
+
+		} else if (do_fallback) { /* Try training at lower link bandwidth if doing fallback. */
+			uint32_t req_bw;
+			uint32_t link_bw;
+			enum dc_link_encoding_format link_encoding = DC_LINK_ENCODING_UNSPECIFIED;
+
+			decide_fallback_link_setting(link, &max_link_settings,
+					&cur_link_settings, status);
+
+			if (link_dp_get_encoding_format(&cur_link_settings) == DP_8b_10b_ENCODING)
+				link_encoding = DC_LINK_ENCODING_DP_8b_10b;
+			else if (link_dp_get_encoding_format(&cur_link_settings) == DP_128b_132b_ENCODING)
+				link_encoding = DC_LINK_ENCODING_DP_128b_132b;
+
+			/* Flag if reduced link bandwidth no longer meets stream requirements or fallen back to
+			 * minimum link bandwidth.
+			 */
+			req_bw = dc_bandwidth_in_kbps_from_timing(&stream->timing, link_encoding);
+			link_bw = dp_link_bandwidth_kbps(link, &cur_link_settings);
+			is_link_bw_low = (req_bw > link_bw);
+			is_link_bw_min = ((cur_link_settings.link_rate <= LINK_RATE_LOW) &&
+				(cur_link_settings.lane_count <= LANE_COUNT_ONE));
+
+			if (is_link_bw_low)
+				DC_LOG_WARNING(
+					"%s: Link(%d) bandwidth too low after fallback req_bw(%d) > link_bw(%d)\n",
+					__func__, link->link_index, req_bw, link_bw);
+		}
+
+		msleep(delay_between_attempts);
+	}
+
+	return false;
+}
+
diff --git a/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_training.h b/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_training.h
new file mode 100644
index 000000000..851bd1731
--- /dev/null
+++ b/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_training.h
@@ -0,0 +1,185 @@
+/*
+ * Copyright 2022 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 __DC_LINK_DP_TRAINING_H__
+#define __DC_LINK_DP_TRAINING_H__
+#include "link.h"
+
+bool perform_link_training_with_retries(
+	const struct dc_link_settings *link_setting,
+	bool skip_video_pattern,
+	int attempts,
+	struct pipe_ctx *pipe_ctx,
+	enum signal_type signal,
+	bool do_fallback);
+
+enum link_training_result dp_perform_link_training(
+		struct dc_link *link,
+		const struct link_resource *link_res,
+		const struct dc_link_settings *link_settings,
+		bool skip_video_pattern);
+
+bool dp_set_hw_training_pattern(
+		struct dc_link *link,
+		const struct link_resource *link_res,
+		enum dc_dp_training_pattern pattern,
+		uint32_t offset);
+
+void dp_set_hw_test_pattern(
+		struct dc_link *link,
+		const struct link_resource *link_res,
+		enum dp_test_pattern test_pattern,
+		uint8_t *custom_pattern,
+		uint32_t custom_pattern_size);
+
+void dpcd_set_training_pattern(
+	struct dc_link *link,
+	enum dc_dp_training_pattern training_pattern);
+
+/* Write DPCD drive settings. */
+enum dc_status dpcd_set_lane_settings(
+	struct dc_link *link,
+	const struct link_training_settings *link_training_setting,
+	uint32_t offset);
+
+/* Write DPCD link configuration data. */
+enum dc_status dpcd_set_link_settings(
+	struct dc_link *link,
+	const struct link_training_settings *lt_settings);
+
+void dpcd_set_lt_pattern_and_lane_settings(
+	struct dc_link *link,
+	const struct link_training_settings *lt_settings,
+	enum dc_dp_training_pattern pattern,
+	uint32_t offset);
+
+/* Read training status and adjustment requests from DPCD. */
+enum dc_status dp_get_lane_status_and_lane_adjust(
+	struct dc_link *link,
+	const struct link_training_settings *link_training_setting,
+	union lane_status ln_status[LANE_COUNT_DP_MAX],
+	union lane_align_status_updated *ln_align,
+	union lane_adjust ln_adjust[LANE_COUNT_DP_MAX],
+	uint32_t offset);
+
+enum dc_status dpcd_configure_lttpr_mode(
+		struct dc_link *link,
+		struct link_training_settings *lt_settings);
+
+enum dc_status configure_lttpr_mode_transparent(struct dc_link *link);
+
+enum dc_status dpcd_configure_channel_coding(
+		struct dc_link *link,
+		struct link_training_settings *lt_settings);
+
+void repeater_training_done(struct dc_link *link, uint32_t offset);
+
+void start_clock_recovery_pattern_early(struct dc_link *link,
+		const struct link_resource *link_res,
+		struct link_training_settings *lt_settings,
+		uint32_t offset);
+
+void dp_decide_training_settings(
+		struct dc_link *link,
+		const struct dc_link_settings *link_settings,
+		struct link_training_settings *lt_settings);
+
+void dp_decide_lane_settings(
+	const struct link_training_settings *lt_settings,
+	const union lane_adjust ln_adjust[LANE_COUNT_DP_MAX],
+	struct dc_lane_settings hw_lane_settings[LANE_COUNT_DP_MAX],
+	union dpcd_training_lane *dpcd_lane_settings);
+
+enum dc_dp_training_pattern decide_cr_training_pattern(
+		const struct dc_link_settings *link_settings);
+
+enum dc_dp_training_pattern decide_eq_training_pattern(struct dc_link *link,
+		const struct dc_link_settings *link_settings);
+
+enum lttpr_mode dp_decide_lttpr_mode(struct dc_link *link,
+		struct dc_link_settings *link_setting);
+
+void dp_get_lttpr_mode_override(struct dc_link *link,
+		enum lttpr_mode *override);
+
+void override_training_settings(
+		struct dc_link *link,
+		const struct dc_link_training_overrides *overrides,
+		struct link_training_settings *lt_settings);
+
+/* Check DPCD training status registers to detect link loss. */
+enum link_training_result dp_check_link_loss_status(
+		struct dc_link *link,
+		const struct link_training_settings *link_training_setting);
+
+bool dp_is_cr_done(enum dc_lane_count ln_count,
+	union lane_status *dpcd_lane_status);
+
+bool dp_is_ch_eq_done(enum dc_lane_count ln_count,
+	union lane_status *dpcd_lane_status);
+bool dp_is_symbol_locked(enum dc_lane_count ln_count,
+	union lane_status *dpcd_lane_status);
+bool dp_is_interlane_aligned(union lane_align_status_updated align_status);
+
+bool is_repeater(const struct link_training_settings *lt_settings, uint32_t offset);
+
+bool dp_is_max_vs_reached(
+	const struct link_training_settings *lt_settings);
+
+uint8_t get_dpcd_link_rate(const struct dc_link_settings *link_settings);
+
+enum link_training_result dp_get_cr_failure(enum dc_lane_count ln_count,
+	union lane_status *dpcd_lane_status);
+
+void dp_hw_to_dpcd_lane_settings(
+	const struct link_training_settings *lt_settings,
+	const struct dc_lane_settings hw_lane_settings[LANE_COUNT_DP_MAX],
+	union dpcd_training_lane dpcd_lane_settings[LANE_COUNT_DP_MAX]);
+
+void dp_wait_for_training_aux_rd_interval(
+	struct dc_link *link,
+	uint32_t wait_in_micro_secs);
+
+enum dpcd_training_patterns
+	dp_training_pattern_to_dpcd_training_pattern(
+	struct dc_link *link,
+	enum dc_dp_training_pattern pattern);
+
+uint8_t dp_initialize_scrambling_data_symbols(
+	struct dc_link *link,
+	enum dc_dp_training_pattern pattern);
+
+void dp_log_training_result(
+	struct dc_link *link,
+	const struct link_training_settings *lt_settings,
+	enum link_training_result status);
+
+uint32_t dp_translate_training_aux_read_interval(
+		uint32_t dpcd_aux_read_interval);
+
+uint8_t dp_get_nibble_at_index(const uint8_t *buf,
+	uint32_t index);
+#endif /* __DC_LINK_DP_TRAINING_H__ */
diff --git a/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_training_128b_132b.c b/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_training_128b_132b.c
new file mode 100644
index 000000000..db87cfe37
--- /dev/null
+++ b/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_training_128b_132b.c
@@ -0,0 +1,265 @@
+/*
+ * Copyright 2022 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
+ *
+ */
+
+/* FILE POLICY AND INTENDED USAGE:
+ * This file implements dp 128b/132b link training software policies and
+ * sequences.
+ */
+#include "link_dp_training_128b_132b.h"
+#include "link_dp_training_8b_10b.h"
+#include "link_dpcd.h"
+#include "link_dp_phy.h"
+#include "link_dp_capability.h"
+
+#define DC_LOGGER \
+	link->ctx->logger
+
+static enum dc_status dpcd_128b_132b_set_lane_settings(
+		struct dc_link *link,
+		const struct link_training_settings *link_training_setting)
+{
+	enum dc_status status = core_link_write_dpcd(link,
+			DP_TRAINING_LANE0_SET,
+			(uint8_t *)(link_training_setting->dpcd_lane_settings),
+			sizeof(link_training_setting->dpcd_lane_settings));
+
+	DC_LOG_HW_LINK_TRAINING("%s:\n 0x%X TX_FFE_PRESET_VALUE = %x\n",
+			__func__,
+			DP_TRAINING_LANE0_SET,
+			link_training_setting->dpcd_lane_settings[0].tx_ffe.PRESET_VALUE);
+	return status;
+}
+
+static void dpcd_128b_132b_get_aux_rd_interval(struct dc_link *link,
+		uint32_t *interval_in_us)
+{
+	union dp_128b_132b_training_aux_rd_interval dpcd_interval;
+	uint32_t interval_unit = 0;
+
+	dpcd_interval.raw = 0;
+	core_link_read_dpcd(link, DP_128B132B_TRAINING_AUX_RD_INTERVAL,
+			&dpcd_interval.raw, sizeof(dpcd_interval.raw));
+	interval_unit = dpcd_interval.bits.UNIT ? 1 : 2; /* 0b = 2 ms, 1b = 1 ms */
+	/* (128b/132b_TRAINING_AUX_RD_INTERVAL value + 1) *
+	 * INTERVAL_UNIT. The maximum is 256 ms
+	 */
+	*interval_in_us = (dpcd_interval.bits.VALUE + 1) * interval_unit * 1000;
+}
+
+static enum link_training_result dp_perform_128b_132b_channel_eq_done_sequence(
+		struct dc_link *link,
+		const struct link_resource *link_res,
+		struct link_training_settings *lt_settings)
+{
+	uint8_t loop_count;
+	uint32_t aux_rd_interval = 0;
+	uint32_t wait_time = 0;
+	union lane_align_status_updated dpcd_lane_status_updated = {0};
+	union lane_status dpcd_lane_status[LANE_COUNT_DP_MAX] = {0};
+	union lane_adjust dpcd_lane_adjust[LANE_COUNT_DP_MAX] = {0};
+	enum dc_status status = DC_OK;
+	enum link_training_result result = LINK_TRAINING_SUCCESS;
+
+	/* Transmit 128b/132b_TPS1 over Main-Link */
+	dp_set_hw_training_pattern(link, link_res, lt_settings->pattern_for_cr, DPRX);
+
+	/* Set TRAINING_PATTERN_SET to 01h */
+	dpcd_set_training_pattern(link, lt_settings->pattern_for_cr);
+
+	/* Adjust TX_FFE_PRESET_VALUE and Transmit 128b/132b_TPS2 over Main-Link */
+	dpcd_128b_132b_get_aux_rd_interval(link, &aux_rd_interval);
+	dp_get_lane_status_and_lane_adjust(link, lt_settings, dpcd_lane_status,
+			&dpcd_lane_status_updated, dpcd_lane_adjust, DPRX);
+	dp_decide_lane_settings(lt_settings, dpcd_lane_adjust,
+			lt_settings->hw_lane_settings, lt_settings->dpcd_lane_settings);
+	dp_set_hw_lane_settings(link, link_res, lt_settings, DPRX);
+	dp_set_hw_training_pattern(link, link_res, lt_settings->pattern_for_eq, DPRX);
+
+	/* Set loop counter to start from 1 */
+	loop_count = 1;
+
+	/* Set TRAINING_PATTERN_SET to 02h and TX_FFE_PRESET_VALUE in one AUX transaction */
+	dpcd_set_lt_pattern_and_lane_settings(link, lt_settings,
+			lt_settings->pattern_for_eq, DPRX);
+
+	/* poll for channel EQ done */
+	while (result == LINK_TRAINING_SUCCESS) {
+		dp_wait_for_training_aux_rd_interval(link, aux_rd_interval);
+		wait_time += aux_rd_interval;
+		status = dp_get_lane_status_and_lane_adjust(link, lt_settings, dpcd_lane_status,
+				&dpcd_lane_status_updated, dpcd_lane_adjust, DPRX);
+		dp_decide_lane_settings(lt_settings, dpcd_lane_adjust,
+				lt_settings->hw_lane_settings, lt_settings->dpcd_lane_settings);
+		dpcd_128b_132b_get_aux_rd_interval(link, &aux_rd_interval);
+		if (status != DC_OK) {
+			result = LINK_TRAINING_ABORT;
+		} else if (dp_is_ch_eq_done(lt_settings->link_settings.lane_count,
+				dpcd_lane_status)) {
+			/* pass */
+			break;
+		} else if (loop_count >= lt_settings->eq_loop_count_limit) {
+			result = DP_128b_132b_MAX_LOOP_COUNT_REACHED;
+		} else if (dpcd_lane_status_updated.bits.LT_FAILED_128b_132b) {
+			result = DP_128b_132b_LT_FAILED;
+		} else {
+			dp_set_hw_lane_settings(link, link_res, lt_settings, DPRX);
+			dpcd_128b_132b_set_lane_settings(link, lt_settings);
+		}
+		loop_count++;
+	}
+
+	/* poll for EQ interlane align done */
+	while (result == LINK_TRAINING_SUCCESS) {
+		if (status != DC_OK) {
+			result = LINK_TRAINING_ABORT;
+		} else if (dpcd_lane_status_updated.bits.EQ_INTERLANE_ALIGN_DONE_128b_132b) {
+			/* pass */
+			break;
+		} else if (wait_time >= lt_settings->eq_wait_time_limit) {
+			result = DP_128b_132b_CHANNEL_EQ_DONE_TIMEOUT;
+		} else if (dpcd_lane_status_updated.bits.LT_FAILED_128b_132b) {
+			result = DP_128b_132b_LT_FAILED;
+		} else {
+			dp_wait_for_training_aux_rd_interval(link,
+					lt_settings->eq_pattern_time);
+			wait_time += lt_settings->eq_pattern_time;
+			status = dp_get_lane_status_and_lane_adjust(link, lt_settings, dpcd_lane_status,
+					&dpcd_lane_status_updated, dpcd_lane_adjust, DPRX);
+		}
+	}
+
+	return result;
+}
+
+static enum link_training_result dp_perform_128b_132b_cds_done_sequence(
+		struct dc_link *link,
+		const struct link_resource *link_res,
+		struct link_training_settings *lt_settings)
+{
+	/* Assumption: assume hardware has transmitted eq pattern */
+	enum dc_status status = DC_OK;
+	enum link_training_result result = LINK_TRAINING_SUCCESS;
+	union lane_align_status_updated dpcd_lane_status_updated = {0};
+	union lane_status dpcd_lane_status[LANE_COUNT_DP_MAX] = {0};
+	union lane_adjust dpcd_lane_adjust[LANE_COUNT_DP_MAX] = {0};
+	uint32_t wait_time = 0;
+
+	/* initiate CDS done sequence */
+	dpcd_set_training_pattern(link, lt_settings->pattern_for_cds);
+
+	/* poll for CDS interlane align done and symbol lock */
+	while (result == LINK_TRAINING_SUCCESS) {
+		dp_wait_for_training_aux_rd_interval(link,
+				lt_settings->cds_pattern_time);
+		wait_time += lt_settings->cds_pattern_time;
+		status = dp_get_lane_status_and_lane_adjust(link, lt_settings, dpcd_lane_status,
+						&dpcd_lane_status_updated, dpcd_lane_adjust, DPRX);
+		if (status != DC_OK) {
+			result = LINK_TRAINING_ABORT;
+		} else if (dp_is_symbol_locked(lt_settings->link_settings.lane_count, dpcd_lane_status) &&
+				dpcd_lane_status_updated.bits.CDS_INTERLANE_ALIGN_DONE_128b_132b) {
+			/* pass */
+			break;
+		} else if (dpcd_lane_status_updated.bits.LT_FAILED_128b_132b) {
+			result = DP_128b_132b_LT_FAILED;
+		} else if (wait_time >= lt_settings->cds_wait_time_limit) {
+			result = DP_128b_132b_CDS_DONE_TIMEOUT;
+		}
+	}
+
+	return result;
+}
+
+enum link_training_result dp_perform_128b_132b_link_training(
+		struct dc_link *link,
+		const struct link_resource *link_res,
+		struct link_training_settings *lt_settings)
+{
+	enum link_training_result result = LINK_TRAINING_SUCCESS;
+
+	/* TODO - DP2.0 Link: remove legacy_dp2_lt logic */
+	if (link->dc->debug.legacy_dp2_lt) {
+		struct link_training_settings legacy_settings;
+
+		decide_8b_10b_training_settings(link,
+				&lt_settings->link_settings,
+				&legacy_settings);
+		return dp_perform_8b_10b_link_training(link, link_res, &legacy_settings);
+	}
+
+	dpcd_set_link_settings(link, lt_settings);
+
+	if (result == LINK_TRAINING_SUCCESS) {
+		result = dp_perform_128b_132b_channel_eq_done_sequence(link, link_res, lt_settings);
+		if (result == LINK_TRAINING_SUCCESS)
+			DC_LOG_HW_LINK_TRAINING("%s: Channel EQ done.\n", __func__);
+	}
+
+	if (result == LINK_TRAINING_SUCCESS) {
+		result = dp_perform_128b_132b_cds_done_sequence(link, link_res, lt_settings);
+		if (result == LINK_TRAINING_SUCCESS)
+			DC_LOG_HW_LINK_TRAINING("%s: CDS done.\n", __func__);
+	}
+
+	return result;
+}
+
+void decide_128b_132b_training_settings(struct dc_link *link,
+		const struct dc_link_settings *link_settings,
+		struct link_training_settings *lt_settings)
+{
+	memset(lt_settings, 0, sizeof(*lt_settings));
+
+	lt_settings->link_settings = *link_settings;
+	/* TODO: should decide link spread when populating link_settings */
+	lt_settings->link_settings.link_spread = link->dp_ss_off ? LINK_SPREAD_DISABLED :
+			LINK_SPREAD_05_DOWNSPREAD_30KHZ;
+
+	lt_settings->pattern_for_cr = decide_cr_training_pattern(link_settings);
+	lt_settings->pattern_for_eq = decide_eq_training_pattern(link, link_settings);
+	lt_settings->eq_pattern_time = 2500;
+	lt_settings->eq_wait_time_limit = 400000;
+	lt_settings->eq_loop_count_limit = 20;
+	lt_settings->pattern_for_cds = DP_128b_132b_TPS2_CDS;
+	lt_settings->cds_pattern_time = 2500;
+	lt_settings->cds_wait_time_limit = (dp_parse_lttpr_repeater_count(
+			link->dpcd_caps.lttpr_caps.phy_repeater_cnt) + 1) * 20000;
+	lt_settings->disallow_per_lane_settings = true;
+	lt_settings->lttpr_mode = dp_decide_128b_132b_lttpr_mode(link);
+	dp_hw_to_dpcd_lane_settings(lt_settings,
+			lt_settings->hw_lane_settings, lt_settings->dpcd_lane_settings);
+}
+
+enum lttpr_mode dp_decide_128b_132b_lttpr_mode(struct dc_link *link)
+{
+	enum lttpr_mode mode = LTTPR_MODE_NON_LTTPR;
+
+	if (dp_is_lttpr_present(link))
+		mode = LTTPR_MODE_NON_TRANSPARENT;
+
+	DC_LOG_DC("128b_132b chose LTTPR_MODE %d.\n", mode);
+	return mode;
+}
+
diff --git a/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_training_128b_132b.h b/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_training_128b_132b.h
new file mode 100644
index 000000000..2147f24ef
--- /dev/null
+++ b/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_training_128b_132b.h
@@ -0,0 +1,42 @@
+/*
+ * Copyright 2022 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 __DC_LINK_DP_TRAINING_128B_132B_H__
+#define __DC_LINK_DP_TRAINING_128B_132B_H__
+#include "link_dp_training.h"
+
+enum link_training_result dp_perform_128b_132b_link_training(
+		struct dc_link *link,
+		const struct link_resource *link_res,
+		struct link_training_settings *lt_settings);
+
+void decide_128b_132b_training_settings(struct dc_link *link,
+		const struct dc_link_settings *link_settings,
+		struct link_training_settings *lt_settings);
+
+enum lttpr_mode dp_decide_128b_132b_lttpr_mode(struct dc_link *link);
+
+#endif /* __DC_LINK_DP_TRAINING_128B_132B_H__ */
diff --git a/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_training_8b_10b.c b/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_training_8b_10b.c
new file mode 100644
index 000000000..2b4c15b0b
--- /dev/null
+++ b/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_training_8b_10b.c
@@ -0,0 +1,420 @@
+/*
+ * Copyright 2022 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
+ *
+ */
+
+/* FILE POLICY AND INTENDED USAGE:
+ * This file implements dp 8b/10b link training software policies and
+ * sequences.
+ */
+#include "link_dp_training_8b_10b.h"
+#include "link_dpcd.h"
+#include "link_dp_phy.h"
+#include "link_dp_capability.h"
+
+#define DC_LOGGER \
+	link->ctx->logger
+
+static int32_t get_cr_training_aux_rd_interval(struct dc_link *link,
+		const struct dc_link_settings *link_settings)
+{
+	union training_aux_rd_interval training_rd_interval;
+	uint32_t wait_in_micro_secs = 100;
+
+	memset(&training_rd_interval, 0, sizeof(training_rd_interval));
+	if (link_dp_get_encoding_format(link_settings) == DP_8b_10b_ENCODING &&
+			link->dpcd_caps.dpcd_rev.raw >= DPCD_REV_12) {
+		core_link_read_dpcd(
+				link,
+				DP_TRAINING_AUX_RD_INTERVAL,
+				(uint8_t *)&training_rd_interval,
+				sizeof(training_rd_interval));
+		if (training_rd_interval.bits.TRAINIG_AUX_RD_INTERVAL)
+			wait_in_micro_secs = training_rd_interval.bits.TRAINIG_AUX_RD_INTERVAL * 4000;
+	}
+	return wait_in_micro_secs;
+}
+
+static uint32_t get_eq_training_aux_rd_interval(
+	struct dc_link *link,
+	const struct dc_link_settings *link_settings)
+{
+	union training_aux_rd_interval training_rd_interval;
+
+	memset(&training_rd_interval, 0, sizeof(training_rd_interval));
+	if (link_dp_get_encoding_format(link_settings) == DP_128b_132b_ENCODING) {
+		core_link_read_dpcd(
+				link,
+				DP_128B132B_TRAINING_AUX_RD_INTERVAL,
+				(uint8_t *)&training_rd_interval,
+				sizeof(training_rd_interval));
+	} else if (link_dp_get_encoding_format(link_settings) == DP_8b_10b_ENCODING &&
+			link->dpcd_caps.dpcd_rev.raw >= DPCD_REV_12) {
+		core_link_read_dpcd(
+				link,
+				DP_TRAINING_AUX_RD_INTERVAL,
+				(uint8_t *)&training_rd_interval,
+				sizeof(training_rd_interval));
+	}
+
+	switch (training_rd_interval.bits.TRAINIG_AUX_RD_INTERVAL) {
+	case 0: return 400;
+	case 1: return 4000;
+	case 2: return 8000;
+	case 3: return 12000;
+	case 4: return 16000;
+	case 5: return 32000;
+	case 6: return 64000;
+	default: return 400;
+	}
+}
+
+void decide_8b_10b_training_settings(
+	 struct dc_link *link,
+	const struct dc_link_settings *link_setting,
+	struct link_training_settings *lt_settings)
+{
+	memset(lt_settings, '\0', sizeof(struct link_training_settings));
+
+	/* Initialize link settings */
+	lt_settings->link_settings.use_link_rate_set = link_setting->use_link_rate_set;
+	lt_settings->link_settings.link_rate_set = link_setting->link_rate_set;
+	lt_settings->link_settings.link_rate = link_setting->link_rate;
+	lt_settings->link_settings.lane_count = link_setting->lane_count;
+	/* TODO hard coded to SS for now
+	 * lt_settings.link_settings.link_spread =
+	 * dal_display_path_is_ss_supported(
+	 * path_mode->display_path) ?
+	 * LINK_SPREAD_05_DOWNSPREAD_30KHZ :
+	 * LINK_SPREAD_DISABLED;
+	 */
+	lt_settings->link_settings.link_spread = link->dp_ss_off ?
+			LINK_SPREAD_DISABLED : LINK_SPREAD_05_DOWNSPREAD_30KHZ;
+	lt_settings->cr_pattern_time = get_cr_training_aux_rd_interval(link, link_setting);
+	lt_settings->eq_pattern_time = get_eq_training_aux_rd_interval(link, link_setting);
+	lt_settings->pattern_for_cr = decide_cr_training_pattern(link_setting);
+	lt_settings->pattern_for_eq = decide_eq_training_pattern(link, link_setting);
+	lt_settings->enhanced_framing = 1;
+	lt_settings->should_set_fec_ready = true;
+	lt_settings->disallow_per_lane_settings = true;
+	lt_settings->always_match_dpcd_with_hw_lane_settings = true;
+	lt_settings->lttpr_mode = dp_decide_8b_10b_lttpr_mode(link);
+	dp_hw_to_dpcd_lane_settings(lt_settings, lt_settings->hw_lane_settings, lt_settings->dpcd_lane_settings);
+}
+
+enum lttpr_mode dp_decide_8b_10b_lttpr_mode(struct dc_link *link)
+{
+	bool is_lttpr_present = dp_is_lttpr_present(link);
+	bool vbios_lttpr_force_non_transparent = link->dc->caps.vbios_lttpr_enable;
+	bool vbios_lttpr_aware = link->dc->caps.vbios_lttpr_aware;
+
+	if (!is_lttpr_present)
+		return LTTPR_MODE_NON_LTTPR;
+
+	if (vbios_lttpr_aware) {
+		if (vbios_lttpr_force_non_transparent) {
+			DC_LOG_DC("chose LTTPR_MODE_NON_TRANSPARENT due to VBIOS DCE_INFO_CAPS_LTTPR_SUPPORT_ENABLE set to 1.\n");
+			return LTTPR_MODE_NON_TRANSPARENT;
+		} else {
+			DC_LOG_DC("chose LTTPR_MODE_NON_TRANSPARENT by default due to VBIOS not set DCE_INFO_CAPS_LTTPR_SUPPORT_ENABLE set to 1.\n");
+			return LTTPR_MODE_TRANSPARENT;
+		}
+	}
+
+	if (link->dc->config.allow_lttpr_non_transparent_mode.bits.DP1_4A &&
+			link->dc->caps.extended_aux_timeout_support) {
+		DC_LOG_DC("chose LTTPR_MODE_NON_TRANSPARENT by default and dc->config.allow_lttpr_non_transparent_mode.bits.DP1_4A set to 1.\n");
+		return LTTPR_MODE_NON_TRANSPARENT;
+	}
+
+	DC_LOG_DC("chose LTTPR_MODE_NON_LTTPR.\n");
+	return LTTPR_MODE_NON_LTTPR;
+}
+
+enum link_training_result perform_8b_10b_clock_recovery_sequence(
+	struct dc_link *link,
+	const struct link_resource *link_res,
+	struct link_training_settings *lt_settings,
+	uint32_t offset)
+{
+	uint32_t retries_cr;
+	uint32_t retry_count;
+	uint32_t wait_time_microsec;
+	enum dc_lane_count lane_count = lt_settings->link_settings.lane_count;
+	union lane_status dpcd_lane_status[LANE_COUNT_DP_MAX];
+	union lane_align_status_updated dpcd_lane_status_updated;
+	union lane_adjust dpcd_lane_adjust[LANE_COUNT_DP_MAX] = {0};
+
+	retries_cr = 0;
+	retry_count = 0;
+
+	memset(&dpcd_lane_status, '\0', sizeof(dpcd_lane_status));
+	memset(&dpcd_lane_status_updated, '\0',
+	sizeof(dpcd_lane_status_updated));
+
+	if (!link->ctx->dc->work_arounds.lt_early_cr_pattern)
+		dp_set_hw_training_pattern(link, link_res, lt_settings->pattern_for_cr, offset);
+
+	/* najeeb - The synaptics MST hub can put the LT in
+	* infinite loop by switching the VS
+	*/
+	/* between level 0 and level 1 continuously, here
+	* we try for CR lock for LinkTrainingMaxCRRetry count*/
+	while ((retries_cr < LINK_TRAINING_MAX_RETRY_COUNT) &&
+		(retry_count < LINK_TRAINING_MAX_CR_RETRY)) {
+
+
+		/* 1. call HWSS to set lane settings*/
+		dp_set_hw_lane_settings(
+				link,
+				link_res,
+				lt_settings,
+				offset);
+
+		/* 2. update DPCD of the receiver*/
+		if (!retry_count)
+			/* EPR #361076 - write as a 5-byte burst,
+			 * but only for the 1-st iteration.*/
+			dpcd_set_lt_pattern_and_lane_settings(
+					link,
+					lt_settings,
+					lt_settings->pattern_for_cr,
+					offset);
+		else
+			dpcd_set_lane_settings(
+					link,
+					lt_settings,
+					offset);
+
+		/* 3. wait receiver to lock-on*/
+		wait_time_microsec = lt_settings->cr_pattern_time;
+
+		dp_wait_for_training_aux_rd_interval(
+				link,
+				wait_time_microsec);
+
+		/* 4. Read lane status and requested drive
+		* settings as set by the sink
+		*/
+		dp_get_lane_status_and_lane_adjust(
+				link,
+				lt_settings,
+				dpcd_lane_status,
+				&dpcd_lane_status_updated,
+				dpcd_lane_adjust,
+				offset);
+
+		/* 5. check CR done*/
+		if (dp_is_cr_done(lane_count, dpcd_lane_status)) {
+			DC_LOG_HW_LINK_TRAINING("%s: Clock recovery OK\n", __func__);
+			return LINK_TRAINING_SUCCESS;
+		}
+
+		/* 6. max VS reached*/
+		if ((link_dp_get_encoding_format(&lt_settings->link_settings) ==
+				DP_8b_10b_ENCODING) &&
+				dp_is_max_vs_reached(lt_settings))
+			break;
+
+		/* 7. same lane settings*/
+		/* Note: settings are the same for all lanes,
+		 * so comparing first lane is sufficient*/
+		if ((link_dp_get_encoding_format(&lt_settings->link_settings) == DP_8b_10b_ENCODING) &&
+				lt_settings->dpcd_lane_settings[0].bits.VOLTAGE_SWING_SET ==
+						dpcd_lane_adjust[0].bits.VOLTAGE_SWING_LANE)
+			retries_cr++;
+		else if ((link_dp_get_encoding_format(&lt_settings->link_settings) == DP_128b_132b_ENCODING) &&
+				lt_settings->dpcd_lane_settings[0].tx_ffe.PRESET_VALUE ==
+						dpcd_lane_adjust[0].tx_ffe.PRESET_VALUE)
+			retries_cr++;
+		else
+			retries_cr = 0;
+
+		/* 8. update VS/PE/PC2 in lt_settings*/
+		dp_decide_lane_settings(lt_settings, dpcd_lane_adjust,
+				lt_settings->hw_lane_settings, lt_settings->dpcd_lane_settings);
+		retry_count++;
+	}
+
+	if (retry_count >= LINK_TRAINING_MAX_CR_RETRY) {
+		ASSERT(0);
+		DC_LOG_ERROR("%s: Link Training Error, could not get CR after %d tries. Possibly voltage swing issue",
+			__func__,
+			LINK_TRAINING_MAX_CR_RETRY);
+
+	}
+
+	return dp_get_cr_failure(lane_count, dpcd_lane_status);
+}
+
+enum link_training_result perform_8b_10b_channel_equalization_sequence(
+	struct dc_link *link,
+	const struct link_resource *link_res,
+	struct link_training_settings *lt_settings,
+	uint32_t offset)
+{
+	enum dc_dp_training_pattern tr_pattern;
+	uint32_t retries_ch_eq;
+	uint32_t wait_time_microsec;
+	enum dc_lane_count lane_count = lt_settings->link_settings.lane_count;
+	union lane_align_status_updated dpcd_lane_status_updated = {0};
+	union lane_status dpcd_lane_status[LANE_COUNT_DP_MAX] = {0};
+	union lane_adjust dpcd_lane_adjust[LANE_COUNT_DP_MAX] = {0};
+
+	/* Note: also check that TPS4 is a supported feature*/
+	tr_pattern = lt_settings->pattern_for_eq;
+
+	if (is_repeater(lt_settings, offset) && link_dp_get_encoding_format(&lt_settings->link_settings) == DP_8b_10b_ENCODING)
+		tr_pattern = DP_TRAINING_PATTERN_SEQUENCE_4;
+
+	dp_set_hw_training_pattern(link, link_res, tr_pattern, offset);
+
+	for (retries_ch_eq = 0; retries_ch_eq <= LINK_TRAINING_MAX_RETRY_COUNT;
+		retries_ch_eq++) {
+
+		dp_set_hw_lane_settings(link, link_res, lt_settings, offset);
+
+		/* 2. update DPCD*/
+		if (!retries_ch_eq)
+			/* EPR #361076 - write as a 5-byte burst,
+			 * but only for the 1-st iteration
+			 */
+
+			dpcd_set_lt_pattern_and_lane_settings(
+				link,
+				lt_settings,
+				tr_pattern, offset);
+		else
+			dpcd_set_lane_settings(link, lt_settings, offset);
+
+		/* 3. wait for receiver to lock-on*/
+		wait_time_microsec = lt_settings->eq_pattern_time;
+
+		if (is_repeater(lt_settings, offset))
+			wait_time_microsec =
+					dp_translate_training_aux_read_interval(
+						link->dpcd_caps.lttpr_caps.aux_rd_interval[offset - 1]);
+
+		dp_wait_for_training_aux_rd_interval(
+				link,
+				wait_time_microsec);
+
+		/* 4. Read lane status and requested
+		 * drive settings as set by the sink*/
+
+		dp_get_lane_status_and_lane_adjust(
+			link,
+			lt_settings,
+			dpcd_lane_status,
+			&dpcd_lane_status_updated,
+			dpcd_lane_adjust,
+			offset);
+
+		/* 5. check CR done*/
+		if (!dp_is_cr_done(lane_count, dpcd_lane_status))
+			return dpcd_lane_status[0].bits.CR_DONE_0 ?
+					LINK_TRAINING_EQ_FAIL_CR_PARTIAL :
+					LINK_TRAINING_EQ_FAIL_CR;
+
+		/* 6. check CHEQ done*/
+		if (dp_is_ch_eq_done(lane_count, dpcd_lane_status) &&
+				dp_is_symbol_locked(lane_count, dpcd_lane_status) &&
+				dp_is_interlane_aligned(dpcd_lane_status_updated))
+			return LINK_TRAINING_SUCCESS;
+
+		/* 7. update VS/PE/PC2 in lt_settings*/
+		dp_decide_lane_settings(lt_settings, dpcd_lane_adjust,
+				lt_settings->hw_lane_settings, lt_settings->dpcd_lane_settings);
+	}
+
+	return LINK_TRAINING_EQ_FAIL_EQ;
+
+}
+
+enum link_training_result dp_perform_8b_10b_link_training(
+		struct dc_link *link,
+		const struct link_resource *link_res,
+		struct link_training_settings *lt_settings)
+{
+	enum link_training_result status = LINK_TRAINING_SUCCESS;
+
+	uint8_t repeater_cnt;
+	uint8_t repeater_id;
+	uint8_t lane = 0;
+
+	if (link->ctx->dc->work_arounds.lt_early_cr_pattern)
+		start_clock_recovery_pattern_early(link, link_res, lt_settings, DPRX);
+
+	/* 1. set link rate, lane count and spread. */
+	dpcd_set_link_settings(link, lt_settings);
+
+	if (lt_settings->lttpr_mode == LTTPR_MODE_NON_TRANSPARENT) {
+
+		/* 2. perform link training (set link training done
+		 *  to false is done as well)
+		 */
+		repeater_cnt = dp_parse_lttpr_repeater_count(link->dpcd_caps.lttpr_caps.phy_repeater_cnt);
+
+		for (repeater_id = repeater_cnt; (repeater_id > 0 && status == LINK_TRAINING_SUCCESS);
+				repeater_id--) {
+			status = perform_8b_10b_clock_recovery_sequence(link, link_res, lt_settings, repeater_id);
+
+			if (status != LINK_TRAINING_SUCCESS) {
+				repeater_training_done(link, repeater_id);
+				break;
+			}
+
+			status = perform_8b_10b_channel_equalization_sequence(link,
+					link_res,
+					lt_settings,
+					repeater_id);
+			if (status == LINK_TRAINING_SUCCESS)
+				DC_LOG_HW_LINK_TRAINING("%s: Channel EQ done.\n", __func__);
+
+			repeater_training_done(link, repeater_id);
+
+			if (status != LINK_TRAINING_SUCCESS)
+				break;
+
+			for (lane = 0; lane < LANE_COUNT_DP_MAX; lane++) {
+				lt_settings->dpcd_lane_settings[lane].raw = 0;
+				lt_settings->hw_lane_settings[lane].VOLTAGE_SWING = 0;
+				lt_settings->hw_lane_settings[lane].PRE_EMPHASIS = 0;
+			}
+		}
+	}
+
+	if (status == LINK_TRAINING_SUCCESS) {
+		status = perform_8b_10b_clock_recovery_sequence(link, link_res, lt_settings, DPRX);
+		if (status == LINK_TRAINING_SUCCESS) {
+			status = perform_8b_10b_channel_equalization_sequence(link,
+					link_res,
+					lt_settings,
+					DPRX);
+			if (status == LINK_TRAINING_SUCCESS)
+				DC_LOG_HW_LINK_TRAINING("%s: Channel EQ done.\n", __func__);
+		}
+	}
+
+	return status;
+}
diff --git a/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_training_8b_10b.h b/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_training_8b_10b.h
new file mode 100644
index 000000000..d26de15ce
--- /dev/null
+++ b/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_training_8b_10b.h
@@ -0,0 +1,61 @@
+/*
+ * Copyright 2022 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 __DC_LINK_DP_TRAINING_8B_10B_H__
+#define __DC_LINK_DP_TRAINING_8B_10B_H__
+#include "link_dp_training.h"
+
+/* to avoid infinite loop where-in the receiver
+ * switches between different VS
+ */
+#define LINK_TRAINING_MAX_CR_RETRY 100
+#define LINK_TRAINING_MAX_RETRY_COUNT 5
+
+enum link_training_result dp_perform_8b_10b_link_training(
+		struct dc_link *link,
+		const struct link_resource *link_res,
+		struct link_training_settings *lt_settings);
+
+enum link_training_result perform_8b_10b_clock_recovery_sequence(
+	struct dc_link *link,
+	const struct link_resource *link_res,
+	struct link_training_settings *lt_settings,
+	uint32_t offset);
+
+enum link_training_result perform_8b_10b_channel_equalization_sequence(
+	struct dc_link *link,
+	const struct link_resource *link_res,
+	struct link_training_settings *lt_settings,
+	uint32_t offset);
+
+enum lttpr_mode dp_decide_8b_10b_lttpr_mode(struct dc_link *link);
+
+void decide_8b_10b_training_settings(
+	 struct dc_link *link,
+	const struct dc_link_settings *link_setting,
+	struct link_training_settings *lt_settings);
+
+#endif /* __DC_LINK_DP_TRAINING_8B_10B_H__ */
diff --git a/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_training_auxless.c b/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_training_auxless.c
new file mode 100644
index 000000000..4c6b886a9
--- /dev/null
+++ b/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_training_auxless.c
@@ -0,0 +1,79 @@
+/*
+ * Copyright 2022 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
+ *
+ */
+
+/* FILE POLICY AND INTENDED USAGE:
+ *
+ */
+#include "link_dp_training_auxless.h"
+#include "link_dp_phy.h"
+#define DC_LOGGER \
+	link->ctx->logger
+bool dp_perform_link_training_skip_aux(
+	struct dc_link *link,
+	const struct link_resource *link_res,
+	const struct dc_link_settings *link_setting)
+{
+	struct link_training_settings lt_settings = {0};
+
+	dp_decide_training_settings(
+			link,
+			link_setting,
+			&lt_settings);
+	override_training_settings(
+			link,
+			&link->preferred_training_settings,
+			&lt_settings);
+
+	/* 1. Perform_clock_recovery_sequence. */
+
+	/* transmit training pattern for clock recovery */
+	dp_set_hw_training_pattern(link, link_res, lt_settings.pattern_for_cr, DPRX);
+
+	/* call HWSS to set lane settings*/
+	dp_set_hw_lane_settings(link, link_res, &lt_settings, DPRX);
+
+	/* wait receiver to lock-on*/
+	dp_wait_for_training_aux_rd_interval(link, lt_settings.cr_pattern_time);
+
+	/* 2. Perform_channel_equalization_sequence. */
+
+	/* transmit training pattern for channel equalization. */
+	dp_set_hw_training_pattern(link, link_res, lt_settings.pattern_for_eq, DPRX);
+
+	/* call HWSS to set lane settings*/
+	dp_set_hw_lane_settings(link, link_res, &lt_settings, DPRX);
+
+	/* wait receiver to lock-on. */
+	dp_wait_for_training_aux_rd_interval(link, lt_settings.eq_pattern_time);
+
+	/* 3. Perform_link_training_int. */
+
+	/* Mainlink output idle pattern. */
+	dp_set_hw_test_pattern(link, link_res, DP_TEST_PATTERN_VIDEO_MODE, NULL, 0);
+
+	dp_log_training_result(link, &lt_settings, LINK_TRAINING_SUCCESS);
+
+	return true;
+}
diff --git a/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_training_auxless.h b/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_training_auxless.h
new file mode 100644
index 000000000..546387a5f
--- /dev/null
+++ b/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_training_auxless.h
@@ -0,0 +1,35 @@
+/*
+ * Copyright 2022 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 __DC_LINK_DP_TRAINING_AUXLESS_H__
+#define __DC_LINK_DP_TRAINING_AUXLESS_H__
+#include "link_dp_training.h"
+
+bool dp_perform_link_training_skip_aux(
+	struct dc_link *link,
+	const struct link_resource *link_res,
+	const struct dc_link_settings *link_setting);
+#endif /* __DC_LINK_DP_TRAINING_AUXLESS_H__ */
diff --git a/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_training_dpia.c b/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_training_dpia.c
new file mode 100644
index 000000000..4f4e899e5
--- /dev/null
+++ b/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_training_dpia.c
@@ -0,0 +1,1048 @@
+/*
+ * Copyright 2022 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
+ *
+ */
+
+/* FILE POLICY AND INTENDED USAGE:
+ * This module implements functionality for training DPIA links.
+ */
+#include "link_dp_training_dpia.h"
+#include "dc.h"
+#include "inc/core_status.h"
+#include "dpcd_defs.h"
+
+#include "link_dp_dpia.h"
+#include "link_hwss.h"
+#include "dm_helpers.h"
+#include "dmub/inc/dmub_cmd.h"
+#include "link_dpcd.h"
+#include "link_dp_phy.h"
+#include "link_dp_training_8b_10b.h"
+#include "link_dp_capability.h"
+#include "dc_dmub_srv.h"
+#define DC_LOGGER \
+	link->ctx->logger
+
+/* The approximate time (us) it takes to transmit 9 USB4 DP clock sync packets. */
+#define DPIA_CLK_SYNC_DELAY 16000
+
+/* Extend interval between training status checks for manual testing. */
+#define DPIA_DEBUG_EXTENDED_AUX_RD_INTERVAL_US 60000000
+
+#define TRAINING_AUX_RD_INTERVAL 100 //us
+
+/* SET_CONFIG message types sent by driver. */
+enum dpia_set_config_type {
+	DPIA_SET_CFG_SET_LINK = 0x01,
+	DPIA_SET_CFG_SET_PHY_TEST_MODE = 0x05,
+	DPIA_SET_CFG_SET_TRAINING = 0x18,
+	DPIA_SET_CFG_SET_VSPE = 0x19
+};
+
+/* Training stages (TS) in SET_CONFIG(SET_TRAINING) message. */
+enum dpia_set_config_ts {
+	DPIA_TS_DPRX_DONE = 0x00, /* Done training DPRX. */
+	DPIA_TS_TPS1 = 0x01,
+	DPIA_TS_TPS2 = 0x02,
+	DPIA_TS_TPS3 = 0x03,
+	DPIA_TS_TPS4 = 0x07,
+	DPIA_TS_UFP_DONE = 0xff /* Done training DPTX-to-DPIA hop. */
+};
+
+/* SET_CONFIG message data associated with messages sent by driver. */
+union dpia_set_config_data {
+	struct {
+		uint8_t mode : 1;
+		uint8_t reserved : 7;
+	} set_link;
+	struct {
+		uint8_t stage;
+	} set_training;
+	struct {
+		uint8_t swing : 2;
+		uint8_t max_swing_reached : 1;
+		uint8_t pre_emph : 2;
+		uint8_t max_pre_emph_reached : 1;
+		uint8_t reserved : 2;
+	} set_vspe;
+	uint8_t raw;
+};
+
+
+/* Configure link as prescribed in link_setting; set LTTPR mode; and
+ * Initialize link training settings.
+ * Abort link training if sink unplug detected.
+ *
+ * @param link DPIA link being trained.
+ * @param[in] link_setting Lane count, link rate and downspread control.
+ * @param[out] lt_settings Link settings and drive settings (voltage swing and pre-emphasis).
+ */
+static enum link_training_result dpia_configure_link(
+		struct dc_link *link,
+		const struct link_resource *link_res,
+		const struct dc_link_settings *link_setting,
+		struct link_training_settings *lt_settings)
+{
+	enum dc_status status;
+	bool fec_enable;
+
+	DC_LOG_HW_LINK_TRAINING("%s\n DPIA(%d) configuring\n - LTTPR mode(%d)\n",
+		__func__,
+		link->link_id.enum_id - ENUM_ID_1,
+		lt_settings->lttpr_mode);
+
+	dp_decide_training_settings(
+		link,
+		link_setting,
+		lt_settings);
+
+	dp_get_lttpr_mode_override(link, &lt_settings->lttpr_mode);
+
+	status = dpcd_configure_channel_coding(link, lt_settings);
+	if (status != DC_OK && link->is_hpd_pending)
+		return LINK_TRAINING_ABORT;
+
+	/* Configure lttpr mode */
+	status = dpcd_configure_lttpr_mode(link, lt_settings);
+	if (status != DC_OK && link->is_hpd_pending)
+		return LINK_TRAINING_ABORT;
+
+	/* Set link rate, lane count and spread. */
+	status = dpcd_set_link_settings(link, lt_settings);
+	if (status != DC_OK && link->is_hpd_pending)
+		return LINK_TRAINING_ABORT;
+
+	if (link->preferred_training_settings.fec_enable != NULL)
+		fec_enable = *link->preferred_training_settings.fec_enable;
+	else
+		fec_enable = true;
+	status = dp_set_fec_ready(link, link_res, fec_enable);
+	if (status != DC_OK && link->is_hpd_pending)
+		return LINK_TRAINING_ABORT;
+
+	return LINK_TRAINING_SUCCESS;
+}
+
+static enum dc_status core_link_send_set_config(
+	struct dc_link *link,
+	uint8_t msg_type,
+	uint8_t msg_data)
+{
+	struct set_config_cmd_payload payload;
+	enum set_config_status set_config_result = SET_CONFIG_PENDING;
+
+	/* prepare set_config payload */
+	payload.msg_type = msg_type;
+	payload.msg_data = msg_data;
+
+	if (!link->ddc->ddc_pin && !link->aux_access_disabled &&
+			(dm_helpers_dmub_set_config_sync(link->ctx,
+			link, &payload, &set_config_result) == -1)) {
+		return DC_ERROR_UNEXPECTED;
+	}
+
+	/* set_config should return ACK if successful */
+	return (set_config_result == SET_CONFIG_ACK_RECEIVED) ? DC_OK : DC_ERROR_UNEXPECTED;
+}
+
+/* Build SET_CONFIG message data payload for specified message type. */
+static uint8_t dpia_build_set_config_data(
+		enum dpia_set_config_type type,
+		struct dc_link *link,
+		struct link_training_settings *lt_settings)
+{
+	union dpia_set_config_data data;
+
+	data.raw = 0;
+
+	switch (type) {
+	case DPIA_SET_CFG_SET_LINK:
+		data.set_link.mode = lt_settings->lttpr_mode == LTTPR_MODE_NON_TRANSPARENT ? 1 : 0;
+		break;
+	case DPIA_SET_CFG_SET_PHY_TEST_MODE:
+		break;
+	case DPIA_SET_CFG_SET_VSPE:
+		/* Assume all lanes have same drive settings. */
+		data.set_vspe.swing = lt_settings->hw_lane_settings[0].VOLTAGE_SWING;
+		data.set_vspe.pre_emph = lt_settings->hw_lane_settings[0].PRE_EMPHASIS;
+		data.set_vspe.max_swing_reached =
+				lt_settings->hw_lane_settings[0].VOLTAGE_SWING == VOLTAGE_SWING_MAX_LEVEL ? 1 : 0;
+		data.set_vspe.max_pre_emph_reached =
+				lt_settings->hw_lane_settings[0].PRE_EMPHASIS == PRE_EMPHASIS_MAX_LEVEL ? 1 : 0;
+		break;
+	default:
+		ASSERT(false); /* Message type not supported by helper function. */
+		break;
+	}
+
+	return data.raw;
+}
+
+/* Convert DC training pattern to DPIA training stage. */
+static enum dc_status convert_trng_ptn_to_trng_stg(enum dc_dp_training_pattern tps, enum dpia_set_config_ts *ts)
+{
+	enum dc_status status = DC_OK;
+
+	switch (tps) {
+	case DP_TRAINING_PATTERN_SEQUENCE_1:
+		*ts = DPIA_TS_TPS1;
+		break;
+	case DP_TRAINING_PATTERN_SEQUENCE_2:
+		*ts = DPIA_TS_TPS2;
+		break;
+	case DP_TRAINING_PATTERN_SEQUENCE_3:
+		*ts = DPIA_TS_TPS3;
+		break;
+	case DP_TRAINING_PATTERN_SEQUENCE_4:
+		*ts = DPIA_TS_TPS4;
+		break;
+	case DP_TRAINING_PATTERN_VIDEOIDLE:
+		*ts = DPIA_TS_DPRX_DONE;
+		break;
+	default: /* TPS not supported by helper function. */
+		ASSERT(false);
+		*ts = DPIA_TS_DPRX_DONE;
+		status = DC_UNSUPPORTED_VALUE;
+		break;
+	}
+
+	return status;
+}
+
+/* Write training pattern to DPCD. */
+static enum dc_status dpcd_set_lt_pattern(
+	struct dc_link *link,
+	enum dc_dp_training_pattern pattern,
+	uint32_t hop)
+{
+	union dpcd_training_pattern dpcd_pattern = {0};
+	uint32_t dpcd_tps_offset = DP_TRAINING_PATTERN_SET;
+	enum dc_status status;
+
+	if (hop != DPRX)
+		dpcd_tps_offset = DP_TRAINING_PATTERN_SET_PHY_REPEATER1 +
+			((DP_REPEATER_CONFIGURATION_AND_STATUS_SIZE) * (hop - 1));
+
+	/* DpcdAddress_TrainingPatternSet */
+	dpcd_pattern.v1_4.TRAINING_PATTERN_SET =
+		dp_training_pattern_to_dpcd_training_pattern(link, pattern);
+
+	dpcd_pattern.v1_4.SCRAMBLING_DISABLE =
+		dp_initialize_scrambling_data_symbols(link, pattern);
+
+	if (hop != DPRX) {
+		DC_LOG_HW_LINK_TRAINING("%s\n LTTPR Repeater ID: %d\n 0x%X pattern = %x\n",
+			__func__,
+			hop,
+			dpcd_tps_offset,
+			dpcd_pattern.v1_4.TRAINING_PATTERN_SET);
+	} else {
+		DC_LOG_HW_LINK_TRAINING("%s\n 0x%X pattern = %x\n",
+			__func__,
+			dpcd_tps_offset,
+			dpcd_pattern.v1_4.TRAINING_PATTERN_SET);
+	}
+
+	status = core_link_write_dpcd(
+			link,
+			dpcd_tps_offset,
+			&dpcd_pattern.raw,
+			sizeof(dpcd_pattern.raw));
+
+	return status;
+}
+
+/* Execute clock recovery phase of link training for specified hop in display
+ * path.in non-transparent mode:
+ * - Driver issues both DPCD and SET_CONFIG transactions.
+ * - TPS1 is transmitted for any hops downstream of DPOA.
+ * - Drive (VS/PE) only transmitted for the hop immediately downstream of DPOA.
+ * - CR for the first hop (DPTX-to-DPIA) is assumed to be successful.
+ *
+ * @param link DPIA link being trained.
+ * @param lt_settings link_setting and drive settings (voltage swing and pre-emphasis).
+ * @param hop Hop in display path. DPRX = 0.
+ */
+static enum link_training_result dpia_training_cr_non_transparent(
+		struct dc_link *link,
+		const struct link_resource *link_res,
+		struct link_training_settings *lt_settings,
+		uint32_t hop)
+{
+	enum link_training_result result = LINK_TRAINING_CR_FAIL_LANE0;
+	uint8_t repeater_cnt = 0; /* Number of hops/repeaters in display path. */
+	enum dc_status status;
+	uint32_t retries_cr = 0; /* Number of consecutive attempts with same VS or PE. */
+	uint32_t retry_count = 0;
+	uint32_t wait_time_microsec = TRAINING_AUX_RD_INTERVAL; /* From DP spec, CR read interval is always 100us. */
+	enum dc_lane_count lane_count = lt_settings->link_settings.lane_count;
+	union lane_status dpcd_lane_status[LANE_COUNT_DP_MAX] = {0};
+	union lane_align_status_updated dpcd_lane_status_updated = {0};
+	union lane_adjust dpcd_lane_adjust[LANE_COUNT_DP_MAX] = {0};
+	uint8_t set_cfg_data;
+	enum dpia_set_config_ts ts;
+
+	repeater_cnt = dp_parse_lttpr_repeater_count(link->dpcd_caps.lttpr_caps.phy_repeater_cnt);
+
+	/* Cap of LINK_TRAINING_MAX_CR_RETRY attempts at clock recovery.
+	 * Fix inherited from perform_clock_recovery_sequence() -
+	 * the DP equivalent of this function:
+	 * Required for Synaptics MST hub which can put the LT in
+	 * infinite loop by switching the VS between level 0 and level 1
+	 * continuously.
+	 */
+	while ((retries_cr < LINK_TRAINING_MAX_RETRY_COUNT) &&
+			(retry_count < LINK_TRAINING_MAX_CR_RETRY)) {
+
+		/* DPTX-to-DPIA */
+		if (hop == repeater_cnt) {
+			/* Send SET_CONFIG(SET_LINK:LC,LR,LTTPR) to notify DPOA that
+			 * non-transparent link training has started.
+			 * This also enables the transmission of clk_sync packets.
+			 */
+			set_cfg_data = dpia_build_set_config_data(
+					DPIA_SET_CFG_SET_LINK,
+					link,
+					lt_settings);
+			status = core_link_send_set_config(
+					link,
+					DPIA_SET_CFG_SET_LINK,
+					set_cfg_data);
+			/* CR for this hop is considered successful as long as
+			 * SET_CONFIG message is acknowledged by DPOA.
+			 */
+			if (status == DC_OK)
+				result = LINK_TRAINING_SUCCESS;
+			else
+				result = LINK_TRAINING_ABORT;
+			break;
+		}
+
+		/* DPOA-to-x */
+		/* Instruct DPOA to transmit TPS1 then update DPCD. */
+		if (retry_count == 0) {
+			status = convert_trng_ptn_to_trng_stg(lt_settings->pattern_for_cr, &ts);
+			if (status != DC_OK) {
+				result = LINK_TRAINING_ABORT;
+				break;
+			}
+			status = core_link_send_set_config(
+					link,
+					DPIA_SET_CFG_SET_TRAINING,
+					ts);
+			if (status != DC_OK) {
+				result = LINK_TRAINING_ABORT;
+				break;
+			}
+			status = dpcd_set_lt_pattern(link, lt_settings->pattern_for_cr, hop);
+			if (status != DC_OK) {
+				result = LINK_TRAINING_ABORT;
+				break;
+			}
+		}
+
+		/* Update DPOA drive settings then DPCD. DPOA does only adjusts
+		 * drive settings for hops immediately downstream.
+		 */
+		if (hop == repeater_cnt - 1) {
+			set_cfg_data = dpia_build_set_config_data(
+					DPIA_SET_CFG_SET_VSPE,
+					link,
+					lt_settings);
+			status = core_link_send_set_config(
+					link,
+					DPIA_SET_CFG_SET_VSPE,
+					set_cfg_data);
+			if (status != DC_OK) {
+				result = LINK_TRAINING_ABORT;
+				break;
+			}
+		}
+		status = dpcd_set_lane_settings(link, lt_settings, hop);
+		if (status != DC_OK) {
+			result = LINK_TRAINING_ABORT;
+			break;
+		}
+
+		dp_wait_for_training_aux_rd_interval(link, wait_time_microsec);
+
+		/* Read status and adjustment requests from DPCD. */
+		status = dp_get_lane_status_and_lane_adjust(
+				link,
+				lt_settings,
+				dpcd_lane_status,
+				&dpcd_lane_status_updated,
+				dpcd_lane_adjust,
+				hop);
+		if (status != DC_OK) {
+			result = LINK_TRAINING_ABORT;
+			break;
+		}
+
+		/* Check if clock recovery successful. */
+		if (dp_is_cr_done(lane_count, dpcd_lane_status)) {
+			DC_LOG_HW_LINK_TRAINING("%s: Clock recovery OK\n", __func__);
+			result = LINK_TRAINING_SUCCESS;
+			break;
+		}
+
+		result = dp_get_cr_failure(lane_count, dpcd_lane_status);
+
+		if (dp_is_max_vs_reached(lt_settings))
+			break;
+
+		/* Count number of attempts with same drive settings.
+		 * Note: settings are the same for all lanes,
+		 * so comparing first lane is sufficient.
+		 */
+		if ((lt_settings->dpcd_lane_settings[0].bits.VOLTAGE_SWING_SET ==
+				dpcd_lane_adjust[0].bits.VOLTAGE_SWING_LANE)
+				&& (lt_settings->dpcd_lane_settings[0].bits.PRE_EMPHASIS_SET ==
+						dpcd_lane_adjust[0].bits.PRE_EMPHASIS_LANE))
+			retries_cr++;
+		else
+			retries_cr = 0;
+
+		/* Update VS/PE. */
+		dp_decide_lane_settings(lt_settings, dpcd_lane_adjust,
+				lt_settings->hw_lane_settings,
+				lt_settings->dpcd_lane_settings);
+		retry_count++;
+	}
+
+	/* Abort link training if clock recovery failed due to HPD unplug. */
+	if (link->is_hpd_pending)
+		result = LINK_TRAINING_ABORT;
+
+	DC_LOG_HW_LINK_TRAINING(
+		"%s\n DPIA(%d) clock recovery\n -hop(%d)\n - result(%d)\n - retries(%d)\n - status(%d)\n",
+		__func__,
+		link->link_id.enum_id - ENUM_ID_1,
+		hop,
+		result,
+		retry_count,
+		status);
+
+	return result;
+}
+
+/* Execute clock recovery phase of link training in transparent LTTPR mode:
+ * - Driver only issues DPCD transactions and leaves USB4 tunneling (SET_CONFIG) messages to DPIA.
+ * - Driver writes TPS1 to DPCD to kick off training.
+ * - Clock recovery (CR) for link is handled by DPOA, which reports result to DPIA on completion.
+ * - DPIA communicates result to driver by updating CR status when driver reads DPCD.
+ *
+ * @param link DPIA link being trained.
+ * @param lt_settings link_setting and drive settings (voltage swing and pre-emphasis).
+ */
+static enum link_training_result dpia_training_cr_transparent(
+		struct dc_link *link,
+		const struct link_resource *link_res,
+		struct link_training_settings *lt_settings)
+{
+	enum link_training_result result = LINK_TRAINING_CR_FAIL_LANE0;
+	enum dc_status status;
+	uint32_t retries_cr = 0; /* Number of consecutive attempts with same VS or PE. */
+	uint32_t retry_count = 0;
+	uint32_t wait_time_microsec = lt_settings->cr_pattern_time;
+	enum dc_lane_count lane_count = lt_settings->link_settings.lane_count;
+	union lane_status dpcd_lane_status[LANE_COUNT_DP_MAX] = {0};
+	union lane_align_status_updated dpcd_lane_status_updated = {0};
+	union lane_adjust dpcd_lane_adjust[LANE_COUNT_DP_MAX] = {0};
+
+	/* Cap of LINK_TRAINING_MAX_CR_RETRY attempts at clock recovery.
+	 * Fix inherited from perform_clock_recovery_sequence() -
+	 * the DP equivalent of this function:
+	 * Required for Synaptics MST hub which can put the LT in
+	 * infinite loop by switching the VS between level 0 and level 1
+	 * continuously.
+	 */
+	while ((retries_cr < LINK_TRAINING_MAX_RETRY_COUNT) &&
+			(retry_count < LINK_TRAINING_MAX_CR_RETRY)) {
+
+		/* Write TPS1 (not VS or PE) to DPCD to start CR phase.
+		 * DPIA sends SET_CONFIG(SET_LINK) to notify DPOA to
+		 * start link training.
+		 */
+		if (retry_count == 0) {
+			status = dpcd_set_lt_pattern(link, lt_settings->pattern_for_cr, DPRX);
+			if (status != DC_OK) {
+				result = LINK_TRAINING_ABORT;
+				break;
+			}
+		}
+
+		dp_wait_for_training_aux_rd_interval(link, wait_time_microsec);
+
+		/* Read status and adjustment requests from DPCD. */
+		status = dp_get_lane_status_and_lane_adjust(
+				link,
+				lt_settings,
+				dpcd_lane_status,
+				&dpcd_lane_status_updated,
+				dpcd_lane_adjust,
+				DPRX);
+		if (status != DC_OK) {
+			result = LINK_TRAINING_ABORT;
+			break;
+		}
+
+		/* Check if clock recovery successful. */
+		if (dp_is_cr_done(lane_count, dpcd_lane_status)) {
+			DC_LOG_HW_LINK_TRAINING("%s: Clock recovery OK\n", __func__);
+			result = LINK_TRAINING_SUCCESS;
+			break;
+		}
+
+		result = dp_get_cr_failure(lane_count, dpcd_lane_status);
+
+		if (dp_is_max_vs_reached(lt_settings))
+			break;
+
+		/* Count number of attempts with same drive settings.
+		 * Note: settings are the same for all lanes,
+		 * so comparing first lane is sufficient.
+		 */
+		if ((lt_settings->dpcd_lane_settings[0].bits.VOLTAGE_SWING_SET ==
+				dpcd_lane_adjust[0].bits.VOLTAGE_SWING_LANE)
+				&& (lt_settings->dpcd_lane_settings[0].bits.PRE_EMPHASIS_SET ==
+						dpcd_lane_adjust[0].bits.PRE_EMPHASIS_LANE))
+			retries_cr++;
+		else
+			retries_cr = 0;
+
+		/* Update VS/PE. */
+		dp_decide_lane_settings(lt_settings, dpcd_lane_adjust,
+				lt_settings->hw_lane_settings, lt_settings->dpcd_lane_settings);
+		retry_count++;
+	}
+
+	/* Abort link training if clock recovery failed due to HPD unplug. */
+	if (link->is_hpd_pending)
+		result = LINK_TRAINING_ABORT;
+
+	DC_LOG_HW_LINK_TRAINING("%s\n DPIA(%d) clock recovery\n -hop(%d)\n - result(%d)\n - retries(%d)\n",
+		__func__,
+		link->link_id.enum_id - ENUM_ID_1,
+		DPRX,
+		result,
+		retry_count);
+
+	return result;
+}
+
+/* Execute clock recovery phase of link training for specified hop in display
+ * path.
+ *
+ * @param link DPIA link being trained.
+ * @param lt_settings link_setting and drive settings (voltage swing and pre-emphasis).
+ * @param hop Hop in display path. DPRX = 0.
+ */
+static enum link_training_result dpia_training_cr_phase(
+		struct dc_link *link,
+		const struct link_resource *link_res,
+		struct link_training_settings *lt_settings,
+		uint32_t hop)
+{
+	enum link_training_result result = LINK_TRAINING_CR_FAIL_LANE0;
+
+	if (lt_settings->lttpr_mode == LTTPR_MODE_NON_TRANSPARENT)
+		result = dpia_training_cr_non_transparent(link, link_res, lt_settings, hop);
+	else
+		result = dpia_training_cr_transparent(link, link_res, lt_settings);
+
+	return result;
+}
+
+/* Return status read interval during equalization phase. */
+static uint32_t dpia_get_eq_aux_rd_interval(
+		const struct dc_link *link,
+		const struct link_training_settings *lt_settings,
+		uint32_t hop)
+{
+	uint32_t wait_time_microsec;
+
+	if (hop == DPRX)
+		wait_time_microsec = lt_settings->eq_pattern_time;
+	else
+		wait_time_microsec =
+				dp_translate_training_aux_read_interval(
+					link->dpcd_caps.lttpr_caps.aux_rd_interval[hop - 1]);
+
+	/* Check debug option for extending aux read interval. */
+	if (link->dc->debug.dpia_debug.bits.extend_aux_rd_interval)
+		wait_time_microsec = DPIA_DEBUG_EXTENDED_AUX_RD_INTERVAL_US;
+
+	return wait_time_microsec;
+}
+
+/* Execute equalization phase of link training for specified hop in display
+ * path in non-transparent mode:
+ * - driver issues both DPCD and SET_CONFIG transactions.
+ * - TPSx is transmitted for any hops downstream of DPOA.
+ * - Drive (VS/PE) only transmitted for the hop immediately downstream of DPOA.
+ * - EQ for the first hop (DPTX-to-DPIA) is assumed to be successful.
+ * - DPRX EQ only reported successful when both DPRX and DPIA requirements (clk sync packets sent) fulfilled.
+ *
+ * @param link DPIA link being trained.
+ * @param lt_settings link_setting and drive settings (voltage swing and pre-emphasis).
+ * @param hop Hop in display path. DPRX = 0.
+ */
+static enum link_training_result dpia_training_eq_non_transparent(
+		struct dc_link *link,
+		const struct link_resource *link_res,
+		struct link_training_settings *lt_settings,
+		uint32_t hop)
+{
+	enum link_training_result result = LINK_TRAINING_EQ_FAIL_EQ;
+	uint8_t repeater_cnt = 0; /* Number of hops/repeaters in display path. */
+	uint32_t retries_eq = 0;
+	enum dc_status status;
+	enum dc_dp_training_pattern tr_pattern;
+	uint32_t wait_time_microsec;
+	enum dc_lane_count lane_count = lt_settings->link_settings.lane_count;
+	union lane_align_status_updated dpcd_lane_status_updated = {0};
+	union lane_status dpcd_lane_status[LANE_COUNT_DP_MAX] = {0};
+	union lane_adjust dpcd_lane_adjust[LANE_COUNT_DP_MAX] = {0};
+	uint8_t set_cfg_data;
+	enum dpia_set_config_ts ts;
+
+	/* Training pattern is TPS4 for repeater;
+	 * TPS2/3/4 for DPRX depending on what it supports.
+	 */
+	if (hop == DPRX)
+		tr_pattern = lt_settings->pattern_for_eq;
+	else
+		tr_pattern = DP_TRAINING_PATTERN_SEQUENCE_4;
+
+	repeater_cnt = dp_parse_lttpr_repeater_count(link->dpcd_caps.lttpr_caps.phy_repeater_cnt);
+
+	for (retries_eq = 0; retries_eq < LINK_TRAINING_MAX_RETRY_COUNT; retries_eq++) {
+
+		/* DPTX-to-DPIA equalization always successful. */
+		if (hop == repeater_cnt) {
+			result = LINK_TRAINING_SUCCESS;
+			break;
+		}
+
+		/* Instruct DPOA to transmit TPSn then update DPCD. */
+		if (retries_eq == 0) {
+			status = convert_trng_ptn_to_trng_stg(tr_pattern, &ts);
+			if (status != DC_OK) {
+				result = LINK_TRAINING_ABORT;
+				break;
+			}
+			status = core_link_send_set_config(
+					link,
+					DPIA_SET_CFG_SET_TRAINING,
+					ts);
+			if (status != DC_OK) {
+				result = LINK_TRAINING_ABORT;
+				break;
+			}
+			status = dpcd_set_lt_pattern(link, tr_pattern, hop);
+			if (status != DC_OK) {
+				result = LINK_TRAINING_ABORT;
+				break;
+			}
+		}
+
+		/* Update DPOA drive settings then DPCD. DPOA only adjusts
+		 * drive settings for hop immediately downstream.
+		 */
+		if (hop == repeater_cnt - 1) {
+			set_cfg_data = dpia_build_set_config_data(
+					DPIA_SET_CFG_SET_VSPE,
+					link,
+					lt_settings);
+			status = core_link_send_set_config(
+					link,
+					DPIA_SET_CFG_SET_VSPE,
+					set_cfg_data);
+			if (status != DC_OK) {
+				result = LINK_TRAINING_ABORT;
+				break;
+			}
+		}
+		status = dpcd_set_lane_settings(link, lt_settings, hop);
+		if (status != DC_OK) {
+			result = LINK_TRAINING_ABORT;
+			break;
+		}
+
+		/* Extend wait time on second equalisation attempt on final hop to
+		 * ensure clock sync packets have been sent.
+		 */
+		if (hop == DPRX && retries_eq == 1)
+			wait_time_microsec = max(wait_time_microsec, (uint32_t) DPIA_CLK_SYNC_DELAY);
+		else
+			wait_time_microsec = dpia_get_eq_aux_rd_interval(link, lt_settings, hop);
+
+		dp_wait_for_training_aux_rd_interval(link, wait_time_microsec);
+
+		/* Read status and adjustment requests from DPCD. */
+		status = dp_get_lane_status_and_lane_adjust(
+				link,
+				lt_settings,
+				dpcd_lane_status,
+				&dpcd_lane_status_updated,
+				dpcd_lane_adjust,
+				hop);
+		if (status != DC_OK) {
+			result = LINK_TRAINING_ABORT;
+			break;
+		}
+
+		/* CR can still fail during EQ phase. Fail training if CR fails. */
+		if (!dp_is_cr_done(lane_count, dpcd_lane_status)) {
+			result = LINK_TRAINING_EQ_FAIL_CR;
+			break;
+		}
+
+		if (dp_is_ch_eq_done(lane_count, dpcd_lane_status) &&
+				dp_is_symbol_locked(link->cur_link_settings.lane_count, dpcd_lane_status) &&
+				dp_is_interlane_aligned(dpcd_lane_status_updated)) {
+			result =  LINK_TRAINING_SUCCESS;
+			break;
+		}
+
+		/* Update VS/PE. */
+		dp_decide_lane_settings(lt_settings, dpcd_lane_adjust,
+				lt_settings->hw_lane_settings, lt_settings->dpcd_lane_settings);
+	}
+
+	/* Abort link training if equalization failed due to HPD unplug. */
+	if (link->is_hpd_pending)
+		result = LINK_TRAINING_ABORT;
+
+	DC_LOG_HW_LINK_TRAINING(
+		"%s\n DPIA(%d) equalization\n - hop(%d)\n - result(%d)\n - retries(%d)\n - status(%d)\n",
+		__func__,
+		link->link_id.enum_id - ENUM_ID_1,
+		hop,
+		result,
+		retries_eq,
+		status);
+
+	return result;
+}
+
+/* Execute equalization phase of link training for specified hop in display
+ * path in transparent LTTPR mode:
+ * - driver only issues DPCD transactions leaves USB4 tunneling (SET_CONFIG) messages to DPIA.
+ * - driver writes TPSx to DPCD to notify DPIA that is in equalization phase.
+ * - equalization (EQ) for link is handled by DPOA, which reports result to DPIA on completion.
+ * - DPIA communicates result to driver by updating EQ status when driver reads DPCD.
+ *
+ * @param link DPIA link being trained.
+ * @param lt_settings link_setting and drive settings (voltage swing and pre-emphasis).
+ * @param hop Hop in display path. DPRX = 0.
+ */
+static enum link_training_result dpia_training_eq_transparent(
+		struct dc_link *link,
+		const struct link_resource *link_res,
+		struct link_training_settings *lt_settings)
+{
+	enum link_training_result result = LINK_TRAINING_EQ_FAIL_EQ;
+	uint32_t retries_eq = 0;
+	enum dc_status status;
+	enum dc_dp_training_pattern tr_pattern = lt_settings->pattern_for_eq;
+	uint32_t wait_time_microsec;
+	enum dc_lane_count lane_count = lt_settings->link_settings.lane_count;
+	union lane_align_status_updated dpcd_lane_status_updated = {0};
+	union lane_status dpcd_lane_status[LANE_COUNT_DP_MAX] = {0};
+	union lane_adjust dpcd_lane_adjust[LANE_COUNT_DP_MAX] = {0};
+
+	wait_time_microsec = dpia_get_eq_aux_rd_interval(link, lt_settings, DPRX);
+
+	for (retries_eq = 0; retries_eq < LINK_TRAINING_MAX_RETRY_COUNT; retries_eq++) {
+
+		if (retries_eq == 0) {
+			status = dpcd_set_lt_pattern(link, tr_pattern, DPRX);
+			if (status != DC_OK) {
+				result = LINK_TRAINING_ABORT;
+				break;
+			}
+		}
+
+		dp_wait_for_training_aux_rd_interval(link, wait_time_microsec);
+
+		/* Read status and adjustment requests from DPCD. */
+		status = dp_get_lane_status_and_lane_adjust(
+				link,
+				lt_settings,
+				dpcd_lane_status,
+				&dpcd_lane_status_updated,
+				dpcd_lane_adjust,
+				DPRX);
+		if (status != DC_OK) {
+			result = LINK_TRAINING_ABORT;
+			break;
+		}
+
+		/* CR can still fail during EQ phase. Fail training if CR fails. */
+		if (!dp_is_cr_done(lane_count, dpcd_lane_status)) {
+			result = LINK_TRAINING_EQ_FAIL_CR;
+			break;
+		}
+
+		if (dp_is_ch_eq_done(lane_count, dpcd_lane_status) &&
+				dp_is_symbol_locked(link->cur_link_settings.lane_count, dpcd_lane_status)) {
+			/* Take into consideration corner case for DP 1.4a LL Compliance CTS as USB4
+			 * has to share encoders unlike DP and USBC
+			 */
+			if (dp_is_interlane_aligned(dpcd_lane_status_updated) || (link->is_automated && retries_eq)) {
+				result =  LINK_TRAINING_SUCCESS;
+				break;
+			}
+		}
+
+		/* Update VS/PE. */
+		dp_decide_lane_settings(lt_settings, dpcd_lane_adjust,
+				lt_settings->hw_lane_settings, lt_settings->dpcd_lane_settings);
+	}
+
+	/* Abort link training if equalization failed due to HPD unplug. */
+	if (link->is_hpd_pending)
+		result = LINK_TRAINING_ABORT;
+
+	DC_LOG_HW_LINK_TRAINING("%s\n DPIA(%d) equalization\n - hop(%d)\n - result(%d)\n - retries(%d)\n",
+		__func__,
+		link->link_id.enum_id - ENUM_ID_1,
+		DPRX,
+		result,
+		retries_eq);
+
+	return result;
+}
+
+/* Execute equalization phase of link training for specified hop in display
+ * path.
+ *
+ * @param link DPIA link being trained.
+ * @param lt_settings link_setting and drive settings (voltage swing and pre-emphasis).
+ * @param hop Hop in display path. DPRX = 0.
+ */
+static enum link_training_result dpia_training_eq_phase(
+		struct dc_link *link,
+		const struct link_resource *link_res,
+		struct link_training_settings *lt_settings,
+		uint32_t hop)
+{
+	enum link_training_result result;
+
+	if (lt_settings->lttpr_mode == LTTPR_MODE_NON_TRANSPARENT)
+		result = dpia_training_eq_non_transparent(link, link_res, lt_settings, hop);
+	else
+		result = dpia_training_eq_transparent(link, link_res, lt_settings);
+
+	return result;
+}
+
+/* End training of specified hop in display path. */
+static enum dc_status dpcd_clear_lt_pattern(
+	struct dc_link *link,
+	uint32_t hop)
+{
+	union dpcd_training_pattern dpcd_pattern = {0};
+	uint32_t dpcd_tps_offset = DP_TRAINING_PATTERN_SET;
+	enum dc_status status;
+
+	if (hop != DPRX)
+		dpcd_tps_offset = DP_TRAINING_PATTERN_SET_PHY_REPEATER1 +
+			((DP_REPEATER_CONFIGURATION_AND_STATUS_SIZE) * (hop - 1));
+
+	status = core_link_write_dpcd(
+			link,
+			dpcd_tps_offset,
+			&dpcd_pattern.raw,
+			sizeof(dpcd_pattern.raw));
+
+	return status;
+}
+
+/* End training of specified hop in display path.
+ *
+ * In transparent LTTPR mode:
+ * - driver clears training pattern for the specified hop in DPCD.
+ * In non-transparent LTTPR mode:
+ * - in addition to clearing training pattern, driver issues USB4 tunneling
+ * (SET_CONFIG) messages to notify DPOA when training is done for first hop
+ * (DPTX-to-DPIA) and last hop (DPRX).
+ *
+ * @param link DPIA link being trained.
+ * @param hop Hop in display path. DPRX = 0.
+ */
+static enum link_training_result dpia_training_end(
+		struct dc_link *link,
+		struct link_training_settings *lt_settings,
+		uint32_t hop)
+{
+	enum link_training_result result = LINK_TRAINING_SUCCESS;
+	uint8_t repeater_cnt = 0; /* Number of hops/repeaters in display path. */
+	enum dc_status status;
+
+	if (lt_settings->lttpr_mode == LTTPR_MODE_NON_TRANSPARENT) {
+
+		repeater_cnt = dp_parse_lttpr_repeater_count(link->dpcd_caps.lttpr_caps.phy_repeater_cnt);
+
+		if (hop == repeater_cnt) { /* DPTX-to-DPIA */
+			/* Send SET_CONFIG(SET_TRAINING:0xff) to notify DPOA that
+			 * DPTX-to-DPIA hop trained. No DPCD write needed for first hop.
+			 */
+			status = core_link_send_set_config(
+					link,
+					DPIA_SET_CFG_SET_TRAINING,
+					DPIA_TS_UFP_DONE);
+			if (status != DC_OK)
+				result = LINK_TRAINING_ABORT;
+		} else { /* DPOA-to-x */
+			/* Write 0x0 to TRAINING_PATTERN_SET */
+			status = dpcd_clear_lt_pattern(link, hop);
+			if (status != DC_OK)
+				result = LINK_TRAINING_ABORT;
+		}
+
+		/* Notify DPOA that non-transparent link training of DPRX done. */
+		if (hop == DPRX && result != LINK_TRAINING_ABORT) {
+			status = core_link_send_set_config(
+					link,
+					DPIA_SET_CFG_SET_TRAINING,
+					DPIA_TS_DPRX_DONE);
+			if (status != DC_OK)
+				result = LINK_TRAINING_ABORT;
+		}
+
+	} else { /* non-LTTPR or transparent LTTPR. */
+
+		/* Write 0x0 to TRAINING_PATTERN_SET */
+		status = dpcd_clear_lt_pattern(link, hop);
+		if (status != DC_OK)
+			result = LINK_TRAINING_ABORT;
+
+	}
+
+	DC_LOG_HW_LINK_TRAINING("%s\n DPIA(%d) end\n - hop(%d)\n - result(%d)\n - LTTPR mode(%d)\n",
+		__func__,
+		link->link_id.enum_id - ENUM_ID_1,
+		hop,
+		result,
+		lt_settings->lttpr_mode);
+
+	return result;
+}
+
+/* When aborting training of specified hop in display path, clean up by:
+ * - Attempting to clear DPCD TRAINING_PATTERN_SET, LINK_BW_SET and LANE_COUNT_SET.
+ * - Sending SET_CONFIG(SET_LINK) with lane count and link rate set to 0.
+ *
+ * @param link DPIA link being trained.
+ * @param hop Hop in display path. DPRX = 0.
+ */
+static void dpia_training_abort(
+		struct dc_link *link,
+		struct link_training_settings *lt_settings,
+		uint32_t hop)
+{
+	uint8_t data = 0;
+	uint32_t dpcd_tps_offset = DP_TRAINING_PATTERN_SET;
+
+	DC_LOG_HW_LINK_TRAINING("%s\n DPIA(%d) aborting\n - LTTPR mode(%d)\n - HPD(%d)\n",
+		__func__,
+		link->link_id.enum_id - ENUM_ID_1,
+		lt_settings->lttpr_mode,
+		link->is_hpd_pending);
+
+	/* Abandon clean-up if sink unplugged. */
+	if (link->is_hpd_pending)
+		return;
+
+	if (hop != DPRX)
+		dpcd_tps_offset = DP_TRAINING_PATTERN_SET_PHY_REPEATER1 +
+			((DP_REPEATER_CONFIGURATION_AND_STATUS_SIZE) * (hop - 1));
+
+	core_link_write_dpcd(link, dpcd_tps_offset, &data, 1);
+	core_link_write_dpcd(link, DP_LINK_BW_SET, &data, 1);
+	core_link_write_dpcd(link, DP_LANE_COUNT_SET, &data, 1);
+	core_link_send_set_config(link, DPIA_SET_CFG_SET_LINK, data);
+}
+
+enum link_training_result dpia_perform_link_training(
+	struct dc_link *link,
+	const struct link_resource *link_res,
+	const struct dc_link_settings *link_setting,
+	bool skip_video_pattern)
+{
+	enum link_training_result result;
+	struct link_training_settings lt_settings = {0};
+	uint8_t repeater_cnt = 0; /* Number of hops/repeaters in display path. */
+	int8_t repeater_id; /* Current hop. */
+
+	struct dc_link_settings link_settings = *link_setting; // non-const copy to pass in
+
+	lt_settings.lttpr_mode = dp_decide_lttpr_mode(link, &link_settings);
+
+	/* Configure link as prescribed in link_setting and set LTTPR mode. */
+	result = dpia_configure_link(link, link_res, link_setting, &lt_settings);
+	if (result != LINK_TRAINING_SUCCESS)
+		return result;
+
+	if (lt_settings.lttpr_mode == LTTPR_MODE_NON_TRANSPARENT)
+		repeater_cnt = dp_parse_lttpr_repeater_count(link->dpcd_caps.lttpr_caps.phy_repeater_cnt);
+
+	/* Train each hop in turn starting with the one closest to DPTX.
+	 * In transparent or non-LTTPR mode, train only the final hop (DPRX).
+	 */
+	for (repeater_id = repeater_cnt; repeater_id >= 0; repeater_id--) {
+		/* Clock recovery. */
+		result = dpia_training_cr_phase(link, link_res, &lt_settings, repeater_id);
+		if (result != LINK_TRAINING_SUCCESS)
+			break;
+
+		/* Equalization. */
+		result = dpia_training_eq_phase(link, link_res, &lt_settings, repeater_id);
+		if (result != LINK_TRAINING_SUCCESS)
+			break;
+
+		/* Stop training hop. */
+		result = dpia_training_end(link, &lt_settings, repeater_id);
+		if (result != LINK_TRAINING_SUCCESS)
+			break;
+	}
+
+	/* Double-check link status if training successful; gracefully abort
+	 * training of current hop if training failed due to message tunneling
+	 * failure; end training of hop if training ended conventionally and
+	 * falling back to lower bandwidth settings possible.
+	 */
+	if (result == LINK_TRAINING_SUCCESS) {
+		fsleep(5000);
+		if (!link->is_automated)
+			result = dp_check_link_loss_status(link, &lt_settings);
+	} else if (result == LINK_TRAINING_ABORT)
+		dpia_training_abort(link, &lt_settings, repeater_id);
+	else
+		dpia_training_end(link, &lt_settings, repeater_id);
+
+	return result;
+}
diff --git a/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_training_dpia.h b/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_training_dpia.h
new file mode 100644
index 000000000..b39fb9faf
--- /dev/null
+++ b/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_training_dpia.h
@@ -0,0 +1,41 @@
+/*
+ * Copyright 2022 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 __DC_LINK_DP_TRAINING_DPIA_H__
+#define __DC_LINK_DP_TRAINING_DPIA_H__
+#include "link_dp_training.h"
+
+/* Train DP tunneling link for USB4 DPIA display endpoint.
+ * DPIA equivalent of dc_link_dp_perfrorm_link_training.
+ * Aborts link training upon detection of sink unplug.
+ */
+enum link_training_result dpia_perform_link_training(
+	struct dc_link *link,
+	const struct link_resource *link_res,
+	const struct dc_link_settings *link_setting,
+	bool skip_video_pattern);
+
+#endif /* __DC_LINK_DP_TRAINING_DPIA_H__ */
diff --git a/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_training_fixed_vs_pe_retimer.c b/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_training_fixed_vs_pe_retimer.c
new file mode 100644
index 000000000..68096d12f
--- /dev/null
+++ b/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_training_fixed_vs_pe_retimer.c
@@ -0,0 +1,891 @@
+/*
+ * Copyright 2022 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
+ *
+ */
+
+/* FILE POLICY AND INTENDED USAGE:
+ * This file implements 8b/10b link training specially modified to support an
+ * embedded retimer chip. This retimer chip is referred as fixed vs pe retimer.
+ * Unlike native dp connection this chip requires a modified link training
+ * protocol based on 8b/10b link training. Since this is a non standard sequence
+ * and we must support this hardware, we decided to isolate it in its own
+ * training sequence inside its own file.
+ */
+#include "link_dp_training_fixed_vs_pe_retimer.h"
+#include "link_dp_training_8b_10b.h"
+#include "link_dpcd.h"
+#include "link_dp_phy.h"
+#include "link_dp_capability.h"
+#include "link_ddc.h"
+
+#define DC_LOGGER \
+	link->ctx->logger
+
+void dp_fixed_vs_pe_read_lane_adjust(
+	struct dc_link *link,
+	union dpcd_training_lane dpcd_lane_adjust[LANE_COUNT_DP_MAX])
+{
+	const uint8_t vendor_lttpr_write_data_vs[3] = {0x0, 0x53, 0x63};
+	const uint8_t vendor_lttpr_write_data_pe[3] = {0x0, 0x54, 0x63};
+	uint8_t dprx_vs = 0;
+	uint8_t dprx_pe = 0;
+	uint8_t lane;
+
+	/* W/A to read lane settings requested by DPRX */
+	link_configure_fixed_vs_pe_retimer(link->ddc,
+			&vendor_lttpr_write_data_vs[0], sizeof(vendor_lttpr_write_data_vs));
+
+	link_query_fixed_vs_pe_retimer(link->ddc, &dprx_vs, 1);
+
+	link_configure_fixed_vs_pe_retimer(link->ddc,
+			&vendor_lttpr_write_data_pe[0], sizeof(vendor_lttpr_write_data_pe));
+
+	link_query_fixed_vs_pe_retimer(link->ddc, &dprx_pe, 1);
+
+	for (lane = 0; lane < LANE_COUNT_DP_MAX; lane++) {
+		dpcd_lane_adjust[lane].bits.VOLTAGE_SWING_SET  = (dprx_vs >> (2 * lane)) & 0x3;
+		dpcd_lane_adjust[lane].bits.PRE_EMPHASIS_SET = (dprx_pe >> (2 * lane)) & 0x3;
+	}
+}
+
+
+void dp_fixed_vs_pe_set_retimer_lane_settings(
+	struct dc_link *link,
+	const union dpcd_training_lane dpcd_lane_adjust[LANE_COUNT_DP_MAX],
+	uint8_t lane_count)
+{
+	const uint8_t vendor_lttpr_write_data_reset[4] = {0x1, 0x50, 0x63, 0xFF};
+	uint8_t vendor_lttpr_write_data_vs[4] = {0x1, 0x51, 0x63, 0x0};
+	uint8_t vendor_lttpr_write_data_pe[4] = {0x1, 0x52, 0x63, 0x0};
+	uint8_t lane = 0;
+
+	for (lane = 0; lane < lane_count; lane++) {
+		vendor_lttpr_write_data_vs[3] |=
+				dpcd_lane_adjust[lane].bits.VOLTAGE_SWING_SET << (2 * lane);
+		vendor_lttpr_write_data_pe[3] |=
+				dpcd_lane_adjust[lane].bits.PRE_EMPHASIS_SET << (2 * lane);
+	}
+
+	/* Force LTTPR to output desired VS and PE */
+	link_configure_fixed_vs_pe_retimer(link->ddc,
+			&vendor_lttpr_write_data_reset[0], sizeof(vendor_lttpr_write_data_reset));
+
+	link_configure_fixed_vs_pe_retimer(link->ddc,
+			&vendor_lttpr_write_data_vs[0], sizeof(vendor_lttpr_write_data_vs));
+
+	link_configure_fixed_vs_pe_retimer(link->ddc,
+			&vendor_lttpr_write_data_pe[0], sizeof(vendor_lttpr_write_data_pe));
+}
+
+static enum link_training_result perform_fixed_vs_pe_nontransparent_training_sequence(
+		struct dc_link *link,
+		const struct link_resource *link_res,
+		struct link_training_settings *lt_settings)
+{
+	enum link_training_result status = LINK_TRAINING_SUCCESS;
+	uint8_t lane = 0;
+	uint8_t toggle_rate = 0x6;
+	uint8_t target_rate = 0x6;
+	bool apply_toggle_rate_wa = false;
+	uint8_t repeater_cnt;
+	uint8_t repeater_id;
+
+	/* Fixed VS/PE specific: Force CR AUX RD Interval to at least 16ms */
+	if (lt_settings->cr_pattern_time < 16000)
+		lt_settings->cr_pattern_time = 16000;
+
+	/* Fixed VS/PE specific: Toggle link rate */
+	apply_toggle_rate_wa = ((link->vendor_specific_lttpr_link_rate_wa == target_rate) || (link->vendor_specific_lttpr_link_rate_wa == 0));
+	target_rate = get_dpcd_link_rate(&lt_settings->link_settings);
+	toggle_rate = (target_rate == 0x6) ? 0xA : 0x6;
+
+	if (apply_toggle_rate_wa)
+		lt_settings->link_settings.link_rate = toggle_rate;
+
+	if (link->ctx->dc->work_arounds.lt_early_cr_pattern)
+		start_clock_recovery_pattern_early(link, link_res, lt_settings, DPRX);
+
+	/* 1. set link rate, lane count and spread. */
+	dpcd_set_link_settings(link, lt_settings);
+
+	/* Fixed VS/PE specific: Toggle link rate back*/
+	if (apply_toggle_rate_wa) {
+		core_link_write_dpcd(
+				link,
+				DP_LINK_BW_SET,
+				&target_rate,
+				1);
+	}
+
+	link->vendor_specific_lttpr_link_rate_wa = target_rate;
+
+	if (lt_settings->lttpr_mode == LTTPR_MODE_NON_TRANSPARENT) {
+
+		/* 2. perform link training (set link training done
+		 *  to false is done as well)
+		 */
+		repeater_cnt = dp_parse_lttpr_repeater_count(link->dpcd_caps.lttpr_caps.phy_repeater_cnt);
+
+		for (repeater_id = repeater_cnt; (repeater_id > 0 && status == LINK_TRAINING_SUCCESS);
+				repeater_id--) {
+			status = perform_8b_10b_clock_recovery_sequence(link, link_res, lt_settings, repeater_id);
+
+			if (status != LINK_TRAINING_SUCCESS) {
+				repeater_training_done(link, repeater_id);
+				break;
+			}
+
+			status = perform_8b_10b_channel_equalization_sequence(link,
+					link_res,
+					lt_settings,
+					repeater_id);
+
+			repeater_training_done(link, repeater_id);
+
+			if (status != LINK_TRAINING_SUCCESS)
+				break;
+
+			for (lane = 0; lane < LANE_COUNT_DP_MAX; lane++) {
+				lt_settings->dpcd_lane_settings[lane].raw = 0;
+				lt_settings->hw_lane_settings[lane].VOLTAGE_SWING = 0;
+				lt_settings->hw_lane_settings[lane].PRE_EMPHASIS = 0;
+			}
+		}
+	}
+
+	if (status == LINK_TRAINING_SUCCESS) {
+		status = perform_8b_10b_clock_recovery_sequence(link, link_res, lt_settings, DPRX);
+		if (status == LINK_TRAINING_SUCCESS) {
+			status = perform_8b_10b_channel_equalization_sequence(link,
+								       link_res,
+								       lt_settings,
+								       DPRX);
+		}
+	}
+
+	return status;
+}
+
+
+enum link_training_result dp_perform_fixed_vs_pe_training_sequence_legacy(
+	struct dc_link *link,
+	const struct link_resource *link_res,
+	struct link_training_settings *lt_settings)
+{
+	const uint8_t vendor_lttpr_write_data_reset[4] = {0x1, 0x50, 0x63, 0xFF};
+	const uint8_t offset = dp_parse_lttpr_repeater_count(
+			link->dpcd_caps.lttpr_caps.phy_repeater_cnt);
+	const uint8_t vendor_lttpr_write_data_intercept_en[4] = {0x1, 0x55, 0x63, 0x0};
+	const uint8_t vendor_lttpr_write_data_intercept_dis[4] = {0x1, 0x55, 0x63, 0x68};
+	uint32_t pre_disable_intercept_delay_ms = 0;
+	uint8_t vendor_lttpr_write_data_vs[4] = {0x1, 0x51, 0x63, 0x0};
+	uint8_t vendor_lttpr_write_data_pe[4] = {0x1, 0x52, 0x63, 0x0};
+	const uint8_t vendor_lttpr_write_data_4lane_1[4] = {0x1, 0x6E, 0xF2, 0x19};
+	const uint8_t vendor_lttpr_write_data_4lane_2[4] = {0x1, 0x6B, 0xF2, 0x01};
+	const uint8_t vendor_lttpr_write_data_4lane_3[4] = {0x1, 0x6D, 0xF2, 0x18};
+	const uint8_t vendor_lttpr_write_data_4lane_4[4] = {0x1, 0x6C, 0xF2, 0x03};
+	const uint8_t vendor_lttpr_write_data_4lane_5[4] = {0x1, 0x03, 0xF3, 0x06};
+	enum link_training_result status = LINK_TRAINING_SUCCESS;
+	uint8_t lane = 0;
+	union down_spread_ctrl downspread = {0};
+	union lane_count_set lane_count_set = {0};
+	uint8_t toggle_rate;
+	uint8_t rate;
+
+	/* Only 8b/10b is supported */
+	ASSERT(link_dp_get_encoding_format(&lt_settings->link_settings) ==
+			DP_8b_10b_ENCODING);
+
+	if (lt_settings->lttpr_mode == LTTPR_MODE_NON_TRANSPARENT) {
+		status = perform_fixed_vs_pe_nontransparent_training_sequence(link, link_res, lt_settings);
+		return status;
+	}
+
+	if (offset != 0xFF) {
+		if (offset == 2) {
+			pre_disable_intercept_delay_ms = link->dc->debug.fixed_vs_aux_delay_config_wa;
+
+		/* Certain display and cable configuration require extra delay */
+		} else if (offset > 2) {
+			pre_disable_intercept_delay_ms = link->dc->debug.fixed_vs_aux_delay_config_wa * 2;
+		}
+	}
+
+	/* Vendor specific: Reset lane settings */
+	link_configure_fixed_vs_pe_retimer(link->ddc,
+			&vendor_lttpr_write_data_reset[0], sizeof(vendor_lttpr_write_data_reset));
+	link_configure_fixed_vs_pe_retimer(link->ddc,
+			&vendor_lttpr_write_data_vs[0], sizeof(vendor_lttpr_write_data_vs));
+	link_configure_fixed_vs_pe_retimer(link->ddc,
+			&vendor_lttpr_write_data_pe[0], sizeof(vendor_lttpr_write_data_pe));
+
+	/* Vendor specific: Enable intercept */
+	link_configure_fixed_vs_pe_retimer(link->ddc,
+			&vendor_lttpr_write_data_intercept_en[0], sizeof(vendor_lttpr_write_data_intercept_en));
+
+
+	/* 1. set link rate, lane count and spread. */
+
+	downspread.raw = (uint8_t)(lt_settings->link_settings.link_spread);
+
+	lane_count_set.bits.LANE_COUNT_SET =
+	lt_settings->link_settings.lane_count;
+
+	lane_count_set.bits.ENHANCED_FRAMING = lt_settings->enhanced_framing;
+	lane_count_set.bits.POST_LT_ADJ_REQ_GRANTED = 0;
+
+
+	if (lt_settings->pattern_for_eq < DP_TRAINING_PATTERN_SEQUENCE_4) {
+		lane_count_set.bits.POST_LT_ADJ_REQ_GRANTED =
+				link->dpcd_caps.max_ln_count.bits.POST_LT_ADJ_REQ_SUPPORTED;
+	}
+
+	core_link_write_dpcd(link, DP_DOWNSPREAD_CTRL,
+		&downspread.raw, sizeof(downspread));
+
+	core_link_write_dpcd(link, DP_LANE_COUNT_SET,
+		&lane_count_set.raw, 1);
+
+	rate = get_dpcd_link_rate(&lt_settings->link_settings);
+
+	/* Vendor specific: Toggle link rate */
+	toggle_rate = (rate == 0x6) ? 0xA : 0x6;
+
+	if (link->vendor_specific_lttpr_link_rate_wa == rate || link->vendor_specific_lttpr_link_rate_wa == 0) {
+		core_link_write_dpcd(
+				link,
+				DP_LINK_BW_SET,
+				&toggle_rate,
+				1);
+	}
+
+	link->vendor_specific_lttpr_link_rate_wa = rate;
+
+	core_link_write_dpcd(link, DP_LINK_BW_SET, &rate, 1);
+
+	DC_LOG_HW_LINK_TRAINING("%s\n %x rate = %x\n %x lane = %x framing = %x\n %x spread = %x\n",
+		__func__,
+		DP_LINK_BW_SET,
+		lt_settings->link_settings.link_rate,
+		DP_LANE_COUNT_SET,
+		lt_settings->link_settings.lane_count,
+		lt_settings->enhanced_framing,
+		DP_DOWNSPREAD_CTRL,
+		lt_settings->link_settings.link_spread);
+
+	if (lt_settings->link_settings.lane_count == LANE_COUNT_FOUR) {
+		link_configure_fixed_vs_pe_retimer(link->ddc,
+				&vendor_lttpr_write_data_4lane_1[0], sizeof(vendor_lttpr_write_data_4lane_1));
+		link_configure_fixed_vs_pe_retimer(link->ddc,
+				&vendor_lttpr_write_data_4lane_2[0], sizeof(vendor_lttpr_write_data_4lane_2));
+		link_configure_fixed_vs_pe_retimer(link->ddc,
+				&vendor_lttpr_write_data_4lane_3[0], sizeof(vendor_lttpr_write_data_4lane_3));
+		link_configure_fixed_vs_pe_retimer(link->ddc,
+				&vendor_lttpr_write_data_4lane_4[0], sizeof(vendor_lttpr_write_data_4lane_4));
+		link_configure_fixed_vs_pe_retimer(link->ddc,
+				&vendor_lttpr_write_data_4lane_5[0], sizeof(vendor_lttpr_write_data_4lane_5));
+	}
+
+	/* 2. Perform link training */
+
+	/* Perform Clock Recovery Sequence */
+	if (status == LINK_TRAINING_SUCCESS) {
+		const uint8_t max_vendor_dpcd_retries = 10;
+		uint32_t retries_cr;
+		uint32_t retry_count;
+		uint32_t wait_time_microsec;
+		enum dc_lane_count lane_count = lt_settings->link_settings.lane_count;
+		union lane_status dpcd_lane_status[LANE_COUNT_DP_MAX];
+		union lane_align_status_updated dpcd_lane_status_updated;
+		union lane_adjust dpcd_lane_adjust[LANE_COUNT_DP_MAX] = {0};
+		uint8_t i = 0;
+
+		retries_cr = 0;
+		retry_count = 0;
+
+		memset(&dpcd_lane_status, '\0', sizeof(dpcd_lane_status));
+		memset(&dpcd_lane_status_updated, '\0',
+		sizeof(dpcd_lane_status_updated));
+
+		while ((retries_cr < LINK_TRAINING_MAX_RETRY_COUNT) &&
+			(retry_count < LINK_TRAINING_MAX_CR_RETRY)) {
+
+
+			/* 1. call HWSS to set lane settings */
+			dp_set_hw_lane_settings(
+					link,
+					link_res,
+					lt_settings,
+					0);
+
+			/* 2. update DPCD of the receiver */
+			if (!retry_count) {
+				/* EPR #361076 - write as a 5-byte burst,
+				 * but only for the 1-st iteration.
+				 */
+				dpcd_set_lt_pattern_and_lane_settings(
+						link,
+						lt_settings,
+						lt_settings->pattern_for_cr,
+						0);
+				/* Vendor specific: Disable intercept */
+				for (i = 0; i < max_vendor_dpcd_retries; i++) {
+					if (pre_disable_intercept_delay_ms != 0)
+						msleep(pre_disable_intercept_delay_ms);
+					if (link_configure_fixed_vs_pe_retimer(link->ddc,
+							&vendor_lttpr_write_data_intercept_dis[0],
+							sizeof(vendor_lttpr_write_data_intercept_dis)))
+						break;
+
+					link_configure_fixed_vs_pe_retimer(link->ddc,
+							&vendor_lttpr_write_data_intercept_en[0],
+							sizeof(vendor_lttpr_write_data_intercept_en));
+				}
+			} else {
+				vendor_lttpr_write_data_vs[3] = 0;
+				vendor_lttpr_write_data_pe[3] = 0;
+
+				for (lane = 0; lane < lane_count; lane++) {
+					vendor_lttpr_write_data_vs[3] |=
+							lt_settings->dpcd_lane_settings[lane].bits.VOLTAGE_SWING_SET << (2 * lane);
+					vendor_lttpr_write_data_pe[3] |=
+							lt_settings->dpcd_lane_settings[lane].bits.PRE_EMPHASIS_SET << (2 * lane);
+				}
+
+				/* Vendor specific: Update VS and PE to DPRX requested value */
+				link_configure_fixed_vs_pe_retimer(link->ddc,
+						&vendor_lttpr_write_data_vs[0], sizeof(vendor_lttpr_write_data_vs));
+				link_configure_fixed_vs_pe_retimer(link->ddc,
+						&vendor_lttpr_write_data_pe[0], sizeof(vendor_lttpr_write_data_pe));
+
+				dpcd_set_lane_settings(
+						link,
+						lt_settings,
+						0);
+			}
+
+			/* 3. wait receiver to lock-on*/
+			wait_time_microsec = lt_settings->cr_pattern_time;
+
+			dp_wait_for_training_aux_rd_interval(
+					link,
+					wait_time_microsec);
+
+			/* 4. Read lane status and requested drive
+			 * settings as set by the sink
+			 */
+			dp_get_lane_status_and_lane_adjust(
+					link,
+					lt_settings,
+					dpcd_lane_status,
+					&dpcd_lane_status_updated,
+					dpcd_lane_adjust,
+					0);
+
+			/* 5. check CR done*/
+			if (dp_is_cr_done(lane_count, dpcd_lane_status)) {
+				status = LINK_TRAINING_SUCCESS;
+				break;
+			}
+
+			/* 6. max VS reached*/
+			if (dp_is_max_vs_reached(lt_settings))
+				break;
+
+			/* 7. same lane settings */
+			/* Note: settings are the same for all lanes,
+			 * so comparing first lane is sufficient
+			 */
+			if (lt_settings->dpcd_lane_settings[0].bits.VOLTAGE_SWING_SET ==
+					dpcd_lane_adjust[0].bits.VOLTAGE_SWING_LANE)
+				retries_cr++;
+			else
+				retries_cr = 0;
+
+			/* 8. update VS/PE/PC2 in lt_settings*/
+			dp_decide_lane_settings(lt_settings, dpcd_lane_adjust,
+					lt_settings->hw_lane_settings, lt_settings->dpcd_lane_settings);
+			retry_count++;
+		}
+
+		if (retry_count >= LINK_TRAINING_MAX_CR_RETRY) {
+			ASSERT(0);
+			DC_LOG_ERROR("%s: Link Training Error, could not get CR after %d tries. Possibly voltage swing issue",
+				__func__,
+				LINK_TRAINING_MAX_CR_RETRY);
+
+		}
+
+		status = dp_get_cr_failure(lane_count, dpcd_lane_status);
+	}
+
+	/* Perform Channel EQ Sequence */
+	if (status == LINK_TRAINING_SUCCESS) {
+		enum dc_dp_training_pattern tr_pattern;
+		uint32_t retries_ch_eq;
+		uint32_t wait_time_microsec;
+		enum dc_lane_count lane_count = lt_settings->link_settings.lane_count;
+		union lane_align_status_updated dpcd_lane_status_updated = {0};
+		union lane_status dpcd_lane_status[LANE_COUNT_DP_MAX] = {0};
+		union lane_adjust dpcd_lane_adjust[LANE_COUNT_DP_MAX] = {0};
+
+		/* Note: also check that TPS4 is a supported feature*/
+		tr_pattern = lt_settings->pattern_for_eq;
+
+		dp_set_hw_training_pattern(link, link_res, tr_pattern, 0);
+
+		status = LINK_TRAINING_EQ_FAIL_EQ;
+
+		for (retries_ch_eq = 0; retries_ch_eq <= LINK_TRAINING_MAX_RETRY_COUNT;
+			retries_ch_eq++) {
+
+			dp_set_hw_lane_settings(link, link_res, lt_settings, 0);
+
+			vendor_lttpr_write_data_vs[3] = 0;
+			vendor_lttpr_write_data_pe[3] = 0;
+
+			for (lane = 0; lane < lane_count; lane++) {
+				vendor_lttpr_write_data_vs[3] |=
+						lt_settings->dpcd_lane_settings[lane].bits.VOLTAGE_SWING_SET << (2 * lane);
+				vendor_lttpr_write_data_pe[3] |=
+						lt_settings->dpcd_lane_settings[lane].bits.PRE_EMPHASIS_SET << (2 * lane);
+			}
+
+			/* Vendor specific: Update VS and PE to DPRX requested value */
+			link_configure_fixed_vs_pe_retimer(link->ddc,
+					&vendor_lttpr_write_data_vs[0], sizeof(vendor_lttpr_write_data_vs));
+			link_configure_fixed_vs_pe_retimer(link->ddc,
+					&vendor_lttpr_write_data_pe[0], sizeof(vendor_lttpr_write_data_pe));
+
+			/* 2. update DPCD*/
+			if (!retries_ch_eq)
+				/* EPR #361076 - write as a 5-byte burst,
+				 * but only for the 1-st iteration
+				 */
+
+				dpcd_set_lt_pattern_and_lane_settings(
+					link,
+					lt_settings,
+					tr_pattern, 0);
+			else
+				dpcd_set_lane_settings(link, lt_settings, 0);
+
+			/* 3. wait for receiver to lock-on*/
+			wait_time_microsec = lt_settings->eq_pattern_time;
+
+			dp_wait_for_training_aux_rd_interval(
+					link,
+					wait_time_microsec);
+
+			/* 4. Read lane status and requested
+			 * drive settings as set by the sink
+			 */
+			dp_get_lane_status_and_lane_adjust(
+				link,
+				lt_settings,
+				dpcd_lane_status,
+				&dpcd_lane_status_updated,
+				dpcd_lane_adjust,
+				0);
+
+			/* 5. check CR done*/
+			if (!dp_is_cr_done(lane_count, dpcd_lane_status)) {
+				status = LINK_TRAINING_EQ_FAIL_CR;
+				break;
+			}
+
+			/* 6. check CHEQ done*/
+			if (dp_is_ch_eq_done(lane_count, dpcd_lane_status) &&
+					dp_is_symbol_locked(lane_count, dpcd_lane_status) &&
+					dp_is_interlane_aligned(dpcd_lane_status_updated)) {
+				status = LINK_TRAINING_SUCCESS;
+				break;
+			}
+
+			/* 7. update VS/PE/PC2 in lt_settings*/
+			dp_decide_lane_settings(lt_settings, dpcd_lane_adjust,
+					lt_settings->hw_lane_settings, lt_settings->dpcd_lane_settings);
+		}
+	}
+
+	return status;
+}
+
+enum link_training_result dp_perform_fixed_vs_pe_training_sequence(
+	struct dc_link *link,
+	const struct link_resource *link_res,
+	struct link_training_settings *lt_settings)
+{
+	const uint8_t vendor_lttpr_write_data_reset[4] = {0x1, 0x50, 0x63, 0xFF};
+	const uint8_t offset = dp_parse_lttpr_repeater_count(
+			link->dpcd_caps.lttpr_caps.phy_repeater_cnt);
+	const uint8_t vendor_lttpr_write_data_intercept_en[4] = {0x1, 0x55, 0x63, 0x0};
+	const uint8_t vendor_lttpr_write_data_intercept_dis[4] = {0x1, 0x55, 0x63, 0x6E};
+	const uint8_t vendor_lttpr_write_data_adicora_eq1[4] = {0x1, 0x55, 0x63, 0x2E};
+	const uint8_t vendor_lttpr_write_data_adicora_eq2[4] = {0x1, 0x55, 0x63, 0x01};
+	const uint8_t vendor_lttpr_write_data_adicora_eq3[4] = {0x1, 0x55, 0x63, 0x68};
+	uint32_t pre_disable_intercept_delay_ms = 0;
+	uint8_t vendor_lttpr_write_data_vs[4] = {0x1, 0x51, 0x63, 0x0};
+	uint8_t vendor_lttpr_write_data_pe[4] = {0x1, 0x52, 0x63, 0x0};
+	const uint8_t vendor_lttpr_write_data_4lane_1[4] = {0x1, 0x6E, 0xF2, 0x19};
+	const uint8_t vendor_lttpr_write_data_4lane_2[4] = {0x1, 0x6B, 0xF2, 0x01};
+	const uint8_t vendor_lttpr_write_data_4lane_3[4] = {0x1, 0x6D, 0xF2, 0x18};
+	const uint8_t vendor_lttpr_write_data_4lane_4[4] = {0x1, 0x6C, 0xF2, 0x03};
+	const uint8_t vendor_lttpr_write_data_4lane_5[4] = {0x1, 0x03, 0xF3, 0x06};
+	enum link_training_result status = LINK_TRAINING_SUCCESS;
+	uint8_t lane = 0;
+	union down_spread_ctrl downspread = {0};
+	union lane_count_set lane_count_set = {0};
+	uint8_t toggle_rate;
+	uint8_t rate;
+
+	/* Only 8b/10b is supported */
+	ASSERT(link_dp_get_encoding_format(&lt_settings->link_settings) ==
+			DP_8b_10b_ENCODING);
+
+	if (lt_settings->lttpr_mode == LTTPR_MODE_NON_TRANSPARENT) {
+		status = perform_fixed_vs_pe_nontransparent_training_sequence(link, link_res, lt_settings);
+		return status;
+	}
+
+	if (offset != 0xFF) {
+		if (offset == 2) {
+			pre_disable_intercept_delay_ms = link->dc->debug.fixed_vs_aux_delay_config_wa;
+
+		/* Certain display and cable configuration require extra delay */
+		} else if (offset > 2) {
+			pre_disable_intercept_delay_ms = link->dc->debug.fixed_vs_aux_delay_config_wa * 2;
+		}
+	}
+
+	/* Vendor specific: Reset lane settings */
+	link_configure_fixed_vs_pe_retimer(link->ddc,
+			&vendor_lttpr_write_data_reset[0], sizeof(vendor_lttpr_write_data_reset));
+	link_configure_fixed_vs_pe_retimer(link->ddc,
+			&vendor_lttpr_write_data_vs[0], sizeof(vendor_lttpr_write_data_vs));
+	link_configure_fixed_vs_pe_retimer(link->ddc,
+			&vendor_lttpr_write_data_pe[0], sizeof(vendor_lttpr_write_data_pe));
+
+	/* Vendor specific: Enable intercept */
+	link_configure_fixed_vs_pe_retimer(link->ddc,
+			&vendor_lttpr_write_data_intercept_en[0], sizeof(vendor_lttpr_write_data_intercept_en));
+
+	/* 1. set link rate, lane count and spread. */
+
+	downspread.raw = (uint8_t)(lt_settings->link_settings.link_spread);
+
+	lane_count_set.bits.LANE_COUNT_SET =
+	lt_settings->link_settings.lane_count;
+
+	lane_count_set.bits.ENHANCED_FRAMING = lt_settings->enhanced_framing;
+	lane_count_set.bits.POST_LT_ADJ_REQ_GRANTED = 0;
+
+
+	if (lt_settings->pattern_for_eq < DP_TRAINING_PATTERN_SEQUENCE_4) {
+		lane_count_set.bits.POST_LT_ADJ_REQ_GRANTED =
+				link->dpcd_caps.max_ln_count.bits.POST_LT_ADJ_REQ_SUPPORTED;
+	}
+
+	core_link_write_dpcd(link, DP_DOWNSPREAD_CTRL,
+		&downspread.raw, sizeof(downspread));
+
+	core_link_write_dpcd(link, DP_LANE_COUNT_SET,
+		&lane_count_set.raw, 1);
+
+	rate = get_dpcd_link_rate(&lt_settings->link_settings);
+
+	/* Vendor specific: Toggle link rate */
+	toggle_rate = (rate == 0x6) ? 0xA : 0x6;
+
+	if (link->vendor_specific_lttpr_link_rate_wa == rate || link->vendor_specific_lttpr_link_rate_wa == 0) {
+		core_link_write_dpcd(
+				link,
+				DP_LINK_BW_SET,
+				&toggle_rate,
+				1);
+	}
+
+	link->vendor_specific_lttpr_link_rate_wa = rate;
+
+	core_link_write_dpcd(link, DP_LINK_BW_SET, &rate, 1);
+
+	DC_LOG_HW_LINK_TRAINING("%s\n %x rate = %x\n %x lane = %x framing = %x\n %x spread = %x\n",
+		__func__,
+		DP_LINK_BW_SET,
+		lt_settings->link_settings.link_rate,
+		DP_LANE_COUNT_SET,
+		lt_settings->link_settings.lane_count,
+		lt_settings->enhanced_framing,
+		DP_DOWNSPREAD_CTRL,
+		lt_settings->link_settings.link_spread);
+
+	if (lt_settings->link_settings.lane_count == LANE_COUNT_FOUR) {
+		link_configure_fixed_vs_pe_retimer(link->ddc,
+				&vendor_lttpr_write_data_4lane_1[0], sizeof(vendor_lttpr_write_data_4lane_1));
+		link_configure_fixed_vs_pe_retimer(link->ddc,
+				&vendor_lttpr_write_data_4lane_2[0], sizeof(vendor_lttpr_write_data_4lane_2));
+		link_configure_fixed_vs_pe_retimer(link->ddc,
+				&vendor_lttpr_write_data_4lane_3[0], sizeof(vendor_lttpr_write_data_4lane_3));
+		link_configure_fixed_vs_pe_retimer(link->ddc,
+				&vendor_lttpr_write_data_4lane_4[0], sizeof(vendor_lttpr_write_data_4lane_4));
+		link_configure_fixed_vs_pe_retimer(link->ddc,
+				&vendor_lttpr_write_data_4lane_5[0], sizeof(vendor_lttpr_write_data_4lane_5));
+	}
+
+	/* 2. Perform link training */
+
+	/* Perform Clock Recovery Sequence */
+	if (status == LINK_TRAINING_SUCCESS) {
+		const uint8_t max_vendor_dpcd_retries = 10;
+		uint32_t retries_cr;
+		uint32_t retry_count;
+		uint32_t wait_time_microsec;
+		enum dc_lane_count lane_count = lt_settings->link_settings.lane_count;
+		union lane_status dpcd_lane_status[LANE_COUNT_DP_MAX];
+		union lane_align_status_updated dpcd_lane_status_updated;
+		union lane_adjust dpcd_lane_adjust[LANE_COUNT_DP_MAX] = {0};
+		uint8_t i = 0;
+
+		retries_cr = 0;
+		retry_count = 0;
+
+		memset(&dpcd_lane_status, '\0', sizeof(dpcd_lane_status));
+		memset(&dpcd_lane_status_updated, '\0',
+		sizeof(dpcd_lane_status_updated));
+
+		while ((retries_cr < LINK_TRAINING_MAX_RETRY_COUNT) &&
+			(retry_count < LINK_TRAINING_MAX_CR_RETRY)) {
+
+
+			/* 1. call HWSS to set lane settings */
+			dp_set_hw_lane_settings(
+					link,
+					link_res,
+					lt_settings,
+					0);
+
+			/* 2. update DPCD of the receiver */
+			if (!retry_count) {
+				/* EPR #361076 - write as a 5-byte burst,
+				 * but only for the 1-st iteration.
+				 */
+				dpcd_set_lt_pattern_and_lane_settings(
+						link,
+						lt_settings,
+						lt_settings->pattern_for_cr,
+						0);
+				/* Vendor specific: Disable intercept */
+				for (i = 0; i < max_vendor_dpcd_retries; i++) {
+					if (pre_disable_intercept_delay_ms != 0)
+						msleep(pre_disable_intercept_delay_ms);
+					if (link_configure_fixed_vs_pe_retimer(link->ddc,
+							&vendor_lttpr_write_data_intercept_dis[0],
+							sizeof(vendor_lttpr_write_data_intercept_dis)))
+						break;
+
+					link_configure_fixed_vs_pe_retimer(link->ddc,
+							&vendor_lttpr_write_data_intercept_en[0],
+							sizeof(vendor_lttpr_write_data_intercept_en));
+				}
+			} else {
+				vendor_lttpr_write_data_vs[3] = 0;
+				vendor_lttpr_write_data_pe[3] = 0;
+
+				for (lane = 0; lane < lane_count; lane++) {
+					vendor_lttpr_write_data_vs[3] |=
+							lt_settings->dpcd_lane_settings[lane].bits.VOLTAGE_SWING_SET << (2 * lane);
+					vendor_lttpr_write_data_pe[3] |=
+							lt_settings->dpcd_lane_settings[lane].bits.PRE_EMPHASIS_SET << (2 * lane);
+				}
+
+				/* Vendor specific: Update VS and PE to DPRX requested value */
+				link_configure_fixed_vs_pe_retimer(link->ddc,
+						&vendor_lttpr_write_data_vs[0], sizeof(vendor_lttpr_write_data_vs));
+				link_configure_fixed_vs_pe_retimer(link->ddc,
+						&vendor_lttpr_write_data_pe[0], sizeof(vendor_lttpr_write_data_pe));
+
+				dpcd_set_lane_settings(
+						link,
+						lt_settings,
+						0);
+			}
+
+			/* 3. wait receiver to lock-on*/
+			wait_time_microsec = lt_settings->cr_pattern_time;
+
+			dp_wait_for_training_aux_rd_interval(
+					link,
+					wait_time_microsec);
+
+			/* 4. Read lane status and requested drive
+			 * settings as set by the sink
+			 */
+			dp_get_lane_status_and_lane_adjust(
+					link,
+					lt_settings,
+					dpcd_lane_status,
+					&dpcd_lane_status_updated,
+					dpcd_lane_adjust,
+					0);
+
+			/* 5. check CR done*/
+			if (dp_is_cr_done(lane_count, dpcd_lane_status)) {
+				status = LINK_TRAINING_SUCCESS;
+				break;
+			}
+
+			/* 6. max VS reached*/
+			if (dp_is_max_vs_reached(lt_settings))
+				break;
+
+			/* 7. same lane settings */
+			/* Note: settings are the same for all lanes,
+			 * so comparing first lane is sufficient
+			 */
+			if (lt_settings->dpcd_lane_settings[0].bits.VOLTAGE_SWING_SET ==
+					dpcd_lane_adjust[0].bits.VOLTAGE_SWING_LANE)
+				retries_cr++;
+			else
+				retries_cr = 0;
+
+			/* 8. update VS/PE/PC2 in lt_settings*/
+			dp_decide_lane_settings(lt_settings, dpcd_lane_adjust,
+					lt_settings->hw_lane_settings, lt_settings->dpcd_lane_settings);
+			retry_count++;
+		}
+
+		if (retry_count >= LINK_TRAINING_MAX_CR_RETRY) {
+			ASSERT(0);
+			DC_LOG_ERROR("%s: Link Training Error, could not get CR after %d tries. Possibly voltage swing issue",
+				__func__,
+				LINK_TRAINING_MAX_CR_RETRY);
+
+		}
+
+		status = dp_get_cr_failure(lane_count, dpcd_lane_status);
+	}
+
+	/* Perform Channel EQ Sequence */
+	if (status == LINK_TRAINING_SUCCESS) {
+		enum dc_dp_training_pattern tr_pattern;
+		uint32_t retries_ch_eq;
+		uint32_t wait_time_microsec;
+		enum dc_lane_count lane_count = lt_settings->link_settings.lane_count;
+		union lane_align_status_updated dpcd_lane_status_updated = {0};
+		union lane_status dpcd_lane_status[LANE_COUNT_DP_MAX] = {0};
+		union lane_adjust dpcd_lane_adjust[LANE_COUNT_DP_MAX] = {0};
+
+		link_configure_fixed_vs_pe_retimer(link->ddc,
+				&vendor_lttpr_write_data_adicora_eq1[0],
+				sizeof(vendor_lttpr_write_data_adicora_eq1));
+		link_configure_fixed_vs_pe_retimer(link->ddc,
+				&vendor_lttpr_write_data_adicora_eq2[0],
+				sizeof(vendor_lttpr_write_data_adicora_eq2));
+
+
+		/* Note: also check that TPS4 is a supported feature*/
+		tr_pattern = lt_settings->pattern_for_eq;
+
+		dp_set_hw_training_pattern(link, link_res, tr_pattern, 0);
+
+		status = LINK_TRAINING_EQ_FAIL_EQ;
+
+		for (retries_ch_eq = 0; retries_ch_eq <= LINK_TRAINING_MAX_RETRY_COUNT;
+			retries_ch_eq++) {
+
+			dp_set_hw_lane_settings(link, link_res, lt_settings, 0);
+
+			vendor_lttpr_write_data_vs[3] = 0;
+			vendor_lttpr_write_data_pe[3] = 0;
+
+			for (lane = 0; lane < lane_count; lane++) {
+				vendor_lttpr_write_data_vs[3] |=
+						lt_settings->dpcd_lane_settings[lane].bits.VOLTAGE_SWING_SET << (2 * lane);
+				vendor_lttpr_write_data_pe[3] |=
+						lt_settings->dpcd_lane_settings[lane].bits.PRE_EMPHASIS_SET << (2 * lane);
+			}
+
+			/* Vendor specific: Update VS and PE to DPRX requested value */
+			link_configure_fixed_vs_pe_retimer(link->ddc,
+					&vendor_lttpr_write_data_vs[0], sizeof(vendor_lttpr_write_data_vs));
+			link_configure_fixed_vs_pe_retimer(link->ddc,
+					&vendor_lttpr_write_data_pe[0], sizeof(vendor_lttpr_write_data_pe));
+
+			/* 2. update DPCD*/
+			if (!retries_ch_eq) {
+				/* EPR #361076 - write as a 5-byte burst,
+				 * but only for the 1-st iteration
+				 */
+
+				dpcd_set_lt_pattern_and_lane_settings(
+					link,
+					lt_settings,
+					tr_pattern, 0);
+
+				link_configure_fixed_vs_pe_retimer(link->ddc,
+						&vendor_lttpr_write_data_adicora_eq3[0],
+						sizeof(vendor_lttpr_write_data_adicora_eq3));
+
+			} else
+				dpcd_set_lane_settings(link, lt_settings, 0);
+
+			/* 3. wait for receiver to lock-on*/
+			wait_time_microsec = lt_settings->eq_pattern_time;
+
+			dp_wait_for_training_aux_rd_interval(
+					link,
+					wait_time_microsec);
+
+			/* 4. Read lane status and requested
+			 * drive settings as set by the sink
+			 */
+			dp_get_lane_status_and_lane_adjust(
+				link,
+				lt_settings,
+				dpcd_lane_status,
+				&dpcd_lane_status_updated,
+				dpcd_lane_adjust,
+				0);
+
+			/* 5. check CR done*/
+			if (!dp_is_cr_done(lane_count, dpcd_lane_status)) {
+				status = LINK_TRAINING_EQ_FAIL_CR;
+				break;
+			}
+
+			/* 6. check CHEQ done*/
+			if (dp_is_ch_eq_done(lane_count, dpcd_lane_status) &&
+					dp_is_symbol_locked(lane_count, dpcd_lane_status) &&
+					dp_is_interlane_aligned(dpcd_lane_status_updated)) {
+				status = LINK_TRAINING_SUCCESS;
+				break;
+			}
+
+			/* 7. update VS/PE/PC2 in lt_settings*/
+			dp_decide_lane_settings(lt_settings, dpcd_lane_adjust,
+					lt_settings->hw_lane_settings, lt_settings->dpcd_lane_settings);
+		}
+	}
+
+	return status;
+}
diff --git a/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_training_fixed_vs_pe_retimer.h b/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_training_fixed_vs_pe_retimer.h
new file mode 100644
index 000000000..c0d6ea329
--- /dev/null
+++ b/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_training_fixed_vs_pe_retimer.h
@@ -0,0 +1,50 @@
+/*
+ * Copyright 2022 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 __DC_LINK_DP_FIXED_VS_PE_RETIMER_H__
+#define __DC_LINK_DP_FIXED_VS_PE_RETIMER_H__
+#include "link_dp_training.h"
+
+enum link_training_result dp_perform_fixed_vs_pe_training_sequence_legacy(
+	struct dc_link *link,
+	const struct link_resource *link_res,
+	struct link_training_settings *lt_settings);
+
+enum link_training_result dp_perform_fixed_vs_pe_training_sequence(
+	struct dc_link *link,
+	const struct link_resource *link_res,
+	struct link_training_settings *lt_settings);
+
+void dp_fixed_vs_pe_set_retimer_lane_settings(
+	struct dc_link *link,
+	const union dpcd_training_lane dpcd_lane_adjust[LANE_COUNT_DP_MAX],
+	uint8_t lane_count);
+
+void dp_fixed_vs_pe_read_lane_adjust(
+	struct dc_link *link,
+	union dpcd_training_lane dpcd_lane_adjust[LANE_COUNT_DP_MAX]);
+
+#endif /* __DC_LINK_DP_FIXED_VS_PE_RETIMER_H__ */
diff --git a/drivers/gpu/drm/amd/display/dc/link/protocols/link_dpcd.c b/drivers/gpu/drm/amd/display/dc/link/protocols/link_dpcd.c
new file mode 100644
index 000000000..fc50931c2
--- /dev/null
+++ b/drivers/gpu/drm/amd/display/dc/link/protocols/link_dpcd.c
@@ -0,0 +1,249 @@
+/*
+ * Copyright 2021 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
+ *
+ */
+
+/* FILE POLICY AND INTENDED USAGE:
+ *
+ * This file implements basic dpcd read/write functionality. It also does basic
+ * dpcd range check to ensure that every dpcd request is compliant with specs
+ * range requirements.
+ */
+
+#include "link_dpcd.h"
+#include <drm/display/drm_dp_helper.h>
+#include "dm_helpers.h"
+
+#define END_ADDRESS(start, size) (start + size - 1)
+#define ADDRESS_RANGE_SIZE(start, end) (end - start + 1)
+struct dpcd_address_range {
+	uint32_t start;
+	uint32_t end;
+};
+
+static enum dc_status internal_link_read_dpcd(
+	struct dc_link *link,
+	uint32_t address,
+	uint8_t *data,
+	uint32_t size)
+{
+	if (!link->aux_access_disabled &&
+			!dm_helpers_dp_read_dpcd(link->ctx,
+			link, address, data, size)) {
+		return DC_ERROR_UNEXPECTED;
+	}
+
+	return DC_OK;
+}
+
+static enum dc_status internal_link_write_dpcd(
+	struct dc_link *link,
+	uint32_t address,
+	const uint8_t *data,
+	uint32_t size)
+{
+	if (!link->aux_access_disabled &&
+			!dm_helpers_dp_write_dpcd(link->ctx,
+			link, address, data, size)) {
+		return DC_ERROR_UNEXPECTED;
+	}
+
+	return DC_OK;
+}
+
+/*
+ * Partition the entire DPCD address space
+ * XXX: This partitioning must cover the entire DPCD address space,
+ * and must contain no gaps or overlapping address ranges.
+ */
+static const struct dpcd_address_range mandatory_dpcd_partitions[] = {
+	{ 0, DP_TRAINING_PATTERN_SET_PHY_REPEATER(DP_PHY_LTTPR1) - 1},
+	{ DP_TRAINING_PATTERN_SET_PHY_REPEATER(DP_PHY_LTTPR1), DP_TRAINING_PATTERN_SET_PHY_REPEATER(DP_PHY_LTTPR2) - 1 },
+	{ DP_TRAINING_PATTERN_SET_PHY_REPEATER(DP_PHY_LTTPR2), DP_TRAINING_PATTERN_SET_PHY_REPEATER(DP_PHY_LTTPR3) - 1 },
+	{ DP_TRAINING_PATTERN_SET_PHY_REPEATER(DP_PHY_LTTPR3), DP_TRAINING_PATTERN_SET_PHY_REPEATER(DP_PHY_LTTPR4) - 1 },
+	{ DP_TRAINING_PATTERN_SET_PHY_REPEATER(DP_PHY_LTTPR4), DP_TRAINING_PATTERN_SET_PHY_REPEATER(DP_PHY_LTTPR5) - 1 },
+	{ DP_TRAINING_PATTERN_SET_PHY_REPEATER(DP_PHY_LTTPR5), DP_TRAINING_PATTERN_SET_PHY_REPEATER(DP_PHY_LTTPR6) - 1 },
+	{ DP_TRAINING_PATTERN_SET_PHY_REPEATER(DP_PHY_LTTPR6), DP_TRAINING_PATTERN_SET_PHY_REPEATER(DP_PHY_LTTPR7) - 1 },
+	{ DP_TRAINING_PATTERN_SET_PHY_REPEATER(DP_PHY_LTTPR7), DP_TRAINING_PATTERN_SET_PHY_REPEATER(DP_PHY_LTTPR8) - 1 },
+	{ DP_TRAINING_PATTERN_SET_PHY_REPEATER(DP_PHY_LTTPR8), DP_FEC_STATUS_PHY_REPEATER(DP_PHY_LTTPR1) - 1 },
+	/*
+	 * The FEC registers are contiguous
+	 */
+	{ DP_FEC_STATUS_PHY_REPEATER(DP_PHY_LTTPR1), DP_FEC_STATUS_PHY_REPEATER(DP_PHY_LTTPR1) - 1 },
+	{ DP_FEC_STATUS_PHY_REPEATER(DP_PHY_LTTPR2), DP_FEC_STATUS_PHY_REPEATER(DP_PHY_LTTPR2) - 1 },
+	{ DP_FEC_STATUS_PHY_REPEATER(DP_PHY_LTTPR3), DP_FEC_STATUS_PHY_REPEATER(DP_PHY_LTTPR3) - 1 },
+	{ DP_FEC_STATUS_PHY_REPEATER(DP_PHY_LTTPR4), DP_FEC_STATUS_PHY_REPEATER(DP_PHY_LTTPR4) - 1 },
+	{ DP_FEC_STATUS_PHY_REPEATER(DP_PHY_LTTPR5), DP_FEC_STATUS_PHY_REPEATER(DP_PHY_LTTPR5) - 1 },
+	{ DP_FEC_STATUS_PHY_REPEATER(DP_PHY_LTTPR6), DP_FEC_STATUS_PHY_REPEATER(DP_PHY_LTTPR6) - 1 },
+	{ DP_FEC_STATUS_PHY_REPEATER(DP_PHY_LTTPR7), DP_FEC_STATUS_PHY_REPEATER(DP_PHY_LTTPR7) - 1 },
+	{ DP_FEC_STATUS_PHY_REPEATER(DP_PHY_LTTPR8), DP_LTTPR_MAX_ADD },
+	/* all remaining DPCD addresses */
+	{ DP_LTTPR_MAX_ADD + 1, DP_DPCD_MAX_ADD } };
+
+static inline bool do_addresses_intersect_with_range(
+		const struct dpcd_address_range *range,
+		const uint32_t start_address,
+		const uint32_t end_address)
+{
+	return start_address <= range->end && end_address >= range->start;
+}
+
+static uint32_t dpcd_get_next_partition_size(const uint32_t address, const uint32_t size)
+{
+	const uint32_t end_address = END_ADDRESS(address, size);
+	uint32_t partition_iterator = 0;
+
+	/*
+	 * find current partition
+	 * this loop spins forever if partition map above is not surjective
+	 */
+	while (!do_addresses_intersect_with_range(&mandatory_dpcd_partitions[partition_iterator],
+				address, end_address))
+		partition_iterator++;
+	if (end_address < mandatory_dpcd_partitions[partition_iterator].end)
+		return size;
+	return ADDRESS_RANGE_SIZE(address, mandatory_dpcd_partitions[partition_iterator].end);
+}
+
+/*
+ * Ranges of DPCD addresses that must be read in a single transaction
+ * XXX: Do not allow any two address ranges in this array to overlap
+ */
+static const struct dpcd_address_range mandatory_dpcd_blocks[] = {
+	{ DP_LT_TUNABLE_PHY_REPEATER_FIELD_DATA_STRUCTURE_REV, DP_PHY_REPEATER_EXTENDED_WAIT_TIMEOUT }};
+
+/*
+ * extend addresses to read all mandatory blocks together
+ */
+static void dpcd_extend_address_range(
+		const uint32_t in_address,
+		uint8_t * const in_data,
+		const uint32_t in_size,
+		uint32_t *out_address,
+		uint8_t **out_data,
+		uint32_t *out_size)
+{
+	const uint32_t end_address = END_ADDRESS(in_address, in_size);
+	const struct dpcd_address_range *addr_range;
+	struct dpcd_address_range new_addr_range;
+	uint32_t i;
+
+	new_addr_range.start = in_address;
+	new_addr_range.end = end_address;
+	for (i = 0; i < ARRAY_SIZE(mandatory_dpcd_blocks); i++) {
+		addr_range = &mandatory_dpcd_blocks[i];
+		if (addr_range->start <= in_address && addr_range->end >= in_address)
+			new_addr_range.start = addr_range->start;
+
+		if (addr_range->start <= end_address && addr_range->end >= end_address)
+			new_addr_range.end = addr_range->end;
+	}
+	*out_address = in_address;
+	*out_size = in_size;
+	*out_data = in_data;
+	if (new_addr_range.start != in_address || new_addr_range.end != end_address) {
+		*out_address = new_addr_range.start;
+		*out_size = ADDRESS_RANGE_SIZE(new_addr_range.start, new_addr_range.end);
+		*out_data = kzalloc(*out_size * sizeof(**out_data), GFP_KERNEL);
+	}
+}
+
+/*
+ * Reduce the AUX reply down to the values the caller requested
+ */
+static void dpcd_reduce_address_range(
+		const uint32_t extended_address,
+		uint8_t * const extended_data,
+		const uint32_t extended_size,
+		const uint32_t reduced_address,
+		uint8_t * const reduced_data,
+		const uint32_t reduced_size)
+{
+	const uint32_t offset = reduced_address - extended_address;
+
+	/*
+	 * If the address is same, address was not extended.
+	 * So we do not need to free any memory.
+	 * The data is in original buffer(reduced_data).
+	 */
+	if (extended_data == reduced_data)
+		return;
+
+	memcpy(&extended_data[offset], reduced_data, reduced_size);
+	kfree(extended_data);
+}
+
+enum dc_status core_link_read_dpcd(
+	struct dc_link *link,
+	uint32_t address,
+	uint8_t *data,
+	uint32_t size)
+{
+	uint32_t extended_address;
+	uint32_t partitioned_address;
+	uint8_t *extended_data;
+	uint32_t extended_size;
+	/* size of the remaining partitioned address space */
+	uint32_t size_left_to_read;
+	enum dc_status status = DC_ERROR_UNEXPECTED;
+	/* size of the next partition to be read from */
+	uint32_t partition_size;
+	uint32_t data_index = 0;
+
+	dpcd_extend_address_range(address, data, size, &extended_address, &extended_data, &extended_size);
+	partitioned_address = extended_address;
+	size_left_to_read = extended_size;
+	while (size_left_to_read) {
+		partition_size = dpcd_get_next_partition_size(partitioned_address, size_left_to_read);
+		status = internal_link_read_dpcd(link, partitioned_address, &extended_data[data_index], partition_size);
+		if (status != DC_OK)
+			break;
+		partitioned_address += partition_size;
+		data_index += partition_size;
+		size_left_to_read -= partition_size;
+	}
+	dpcd_reduce_address_range(extended_address, extended_data, extended_size, address, data, size);
+	return status;
+}
+
+enum dc_status core_link_write_dpcd(
+	struct dc_link *link,
+	uint32_t address,
+	const uint8_t *data,
+	uint32_t size)
+{
+	uint32_t partition_size;
+	uint32_t data_index = 0;
+	enum dc_status status = DC_ERROR_UNEXPECTED;
+
+	while (size) {
+		partition_size = dpcd_get_next_partition_size(address, size);
+		status = internal_link_write_dpcd(link, address, &data[data_index], partition_size);
+		if (status != DC_OK)
+			break;
+		address += partition_size;
+		data_index += partition_size;
+		size -= partition_size;
+	}
+	return status;
+}
diff --git a/drivers/gpu/drm/amd/display/dc/link/protocols/link_dpcd.h b/drivers/gpu/drm/amd/display/dc/link/protocols/link_dpcd.h
new file mode 100644
index 000000000..08d787a1e
--- /dev/null
+++ b/drivers/gpu/drm/amd/display/dc/link/protocols/link_dpcd.h
@@ -0,0 +1,42 @@
+/*
+ * Copyright 2021 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 __LINK_DPCD_H__
+#define __LINK_DPCD_H__
+#include "link.h"
+#include "dpcd_defs.h"
+
+enum dc_status core_link_read_dpcd(
+		struct dc_link *link,
+		uint32_t address,
+		uint8_t *data,
+		uint32_t size);
+
+enum dc_status core_link_write_dpcd(
+		struct dc_link *link,
+		uint32_t address,
+		const uint8_t *data,
+		uint32_t size);
+#endif
diff --git a/drivers/gpu/drm/amd/display/dc/link/protocols/link_edp_panel_control.c b/drivers/gpu/drm/amd/display/dc/link/protocols/link_edp_panel_control.c
new file mode 100644
index 000000000..6f64aab18
--- /dev/null
+++ b/drivers/gpu/drm/amd/display/dc/link/protocols/link_edp_panel_control.c
@@ -0,0 +1,1079 @@
+/*
+ * Copyright 2022 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
+ *
+ */
+
+/* FILE POLICY AND INTENDED USAGE:
+ * This file implements retrieval and configuration of eDP panel features such
+ * as PSR and ABM and it also manages specs defined eDP panel power sequences.
+ */
+
+#include "link_edp_panel_control.h"
+#include "link_dpcd.h"
+#include "link_dp_capability.h"
+#include "dm_helpers.h"
+#include "dal_asic_id.h"
+#include "link_dp_phy.h"
+#include "dce/dmub_psr.h"
+#include "dc/dc_dmub_srv.h"
+#include "dce/dmub_replay.h"
+#include "abm.h"
+#define DC_LOGGER_INIT(logger)
+
+#define DP_SINK_PR_ENABLE_AND_CONFIGURATION		0x37B
+
+/* Travis */
+static const uint8_t DP_VGA_LVDS_CONVERTER_ID_2[] = "sivarT";
+/* Nutmeg */
+static const uint8_t DP_VGA_LVDS_CONVERTER_ID_3[] = "dnomlA";
+
+void dp_set_panel_mode(struct dc_link *link, enum dp_panel_mode panel_mode)
+{
+	union dpcd_edp_config edp_config_set;
+	bool panel_mode_edp = false;
+	enum dc_status result;
+
+	memset(&edp_config_set, '\0', sizeof(union dpcd_edp_config));
+
+	switch (panel_mode) {
+	case DP_PANEL_MODE_EDP:
+	case DP_PANEL_MODE_SPECIAL:
+		panel_mode_edp = true;
+		break;
+
+	default:
+		break;
+	}
+
+	/*set edp panel mode in receiver*/
+	result = core_link_read_dpcd(
+		link,
+		DP_EDP_CONFIGURATION_SET,
+		&edp_config_set.raw,
+		sizeof(edp_config_set.raw));
+
+	if (result == DC_OK &&
+		edp_config_set.bits.PANEL_MODE_EDP
+		!= panel_mode_edp) {
+
+		edp_config_set.bits.PANEL_MODE_EDP =
+		panel_mode_edp;
+		result = core_link_write_dpcd(
+			link,
+			DP_EDP_CONFIGURATION_SET,
+			&edp_config_set.raw,
+			sizeof(edp_config_set.raw));
+
+		ASSERT(result == DC_OK);
+	}
+
+	link->panel_mode = panel_mode;
+	DC_LOG_DETECTION_DP_CAPS("Link: %d eDP panel mode supported: %d "
+		 "eDP panel mode enabled: %d \n",
+		 link->link_index,
+		 link->dpcd_caps.panel_mode_edp,
+		 panel_mode_edp);
+}
+
+enum dp_panel_mode dp_get_panel_mode(struct dc_link *link)
+{
+	/* We need to explicitly check that connector
+	 * is not DP. Some Travis_VGA get reported
+	 * by video bios as DP.
+	 */
+	if (link->connector_signal != SIGNAL_TYPE_DISPLAY_PORT) {
+
+		switch (link->dpcd_caps.branch_dev_id) {
+		case DP_BRANCH_DEVICE_ID_0022B9:
+			/* alternate scrambler reset is required for Travis
+			 * for the case when external chip does not
+			 * provide sink device id, alternate scrambler
+			 * scheme will  be overriden later by querying
+			 * Encoder features
+			 */
+			if (strncmp(
+				link->dpcd_caps.branch_dev_name,
+				DP_VGA_LVDS_CONVERTER_ID_2,
+				sizeof(
+				link->dpcd_caps.
+				branch_dev_name)) == 0) {
+					return DP_PANEL_MODE_SPECIAL;
+			}
+			break;
+		case DP_BRANCH_DEVICE_ID_00001A:
+			/* alternate scrambler reset is required for Travis
+			 * for the case when external chip does not provide
+			 * sink device id, alternate scrambler scheme will
+			 * be overriden later by querying Encoder feature
+			 */
+			if (strncmp(link->dpcd_caps.branch_dev_name,
+				DP_VGA_LVDS_CONVERTER_ID_3,
+				sizeof(
+				link->dpcd_caps.
+				branch_dev_name)) == 0) {
+					return DP_PANEL_MODE_SPECIAL;
+			}
+			break;
+		default:
+			break;
+		}
+	}
+
+	if (link->dpcd_caps.panel_mode_edp &&
+		(link->connector_signal == SIGNAL_TYPE_EDP ||
+		 (link->connector_signal == SIGNAL_TYPE_DISPLAY_PORT &&
+		  link->is_internal_display))) {
+		return DP_PANEL_MODE_EDP;
+	}
+
+	return DP_PANEL_MODE_DEFAULT;
+}
+
+bool edp_set_backlight_level_nits(struct dc_link *link,
+		bool isHDR,
+		uint32_t backlight_millinits,
+		uint32_t transition_time_in_ms)
+{
+	struct dpcd_source_backlight_set dpcd_backlight_set;
+	uint8_t backlight_control = isHDR ? 1 : 0;
+
+	if (!link || (link->connector_signal != SIGNAL_TYPE_EDP &&
+			link->connector_signal != SIGNAL_TYPE_DISPLAY_PORT))
+		return false;
+
+	// OLEDs have no PWM, they can only use AUX
+	if (link->dpcd_sink_ext_caps.bits.oled == 1)
+		backlight_control = 1;
+
+	*(uint32_t *)&dpcd_backlight_set.backlight_level_millinits = backlight_millinits;
+	*(uint16_t *)&dpcd_backlight_set.backlight_transition_time_ms = (uint16_t)transition_time_in_ms;
+
+
+	if (!link->dpcd_caps.panel_luminance_control) {
+		if (core_link_write_dpcd(link, DP_SOURCE_BACKLIGHT_LEVEL,
+			(uint8_t *)(&dpcd_backlight_set),
+			sizeof(dpcd_backlight_set)) != DC_OK)
+			return false;
+
+		if (core_link_write_dpcd(link, DP_SOURCE_BACKLIGHT_CONTROL,
+			&backlight_control, 1) != DC_OK)
+			return false;
+	} else {
+		const uint8_t backlight_enable = DP_EDP_PANEL_LUMINANCE_CONTROL_ENABLE;
+		struct target_luminance_value *target_luminance = NULL;
+
+		//if target luminance value is greater than 24 bits, clip the value to 24 bits
+		if (backlight_millinits > 0xFFFFFF)
+			backlight_millinits = 0xFFFFFF;
+
+		target_luminance = (struct target_luminance_value *)&backlight_millinits;
+
+		if (core_link_write_dpcd(link, DP_EDP_BACKLIGHT_MODE_SET_REGISTER,
+			&backlight_enable,
+			sizeof(backlight_enable)) != DC_OK)
+			return false;
+
+		if (core_link_write_dpcd(link, DP_EDP_PANEL_TARGET_LUMINANCE_VALUE,
+			(uint8_t *)(target_luminance),
+			sizeof(struct target_luminance_value)) != DC_OK)
+			return false;
+	}
+
+	return true;
+}
+
+bool edp_get_backlight_level_nits(struct dc_link *link,
+		uint32_t *backlight_millinits_avg,
+		uint32_t *backlight_millinits_peak)
+{
+	union dpcd_source_backlight_get dpcd_backlight_get;
+
+	memset(&dpcd_backlight_get, 0, sizeof(union dpcd_source_backlight_get));
+
+	if (!link || (link->connector_signal != SIGNAL_TYPE_EDP &&
+			link->connector_signal != SIGNAL_TYPE_DISPLAY_PORT))
+		return false;
+
+	if (!core_link_read_dpcd(link, DP_SOURCE_BACKLIGHT_CURRENT_PEAK,
+			dpcd_backlight_get.raw,
+			sizeof(union dpcd_source_backlight_get)))
+		return false;
+
+	*backlight_millinits_avg =
+		dpcd_backlight_get.bytes.backlight_millinits_avg;
+	*backlight_millinits_peak =
+		dpcd_backlight_get.bytes.backlight_millinits_peak;
+
+	/* On non-supported panels dpcd_read usually succeeds with 0 returned */
+	if (*backlight_millinits_avg == 0 ||
+			*backlight_millinits_avg > *backlight_millinits_peak)
+		return false;
+
+	return true;
+}
+
+bool edp_backlight_enable_aux(struct dc_link *link, bool enable)
+{
+	uint8_t backlight_enable = enable ? 1 : 0;
+
+	if (!link || (link->connector_signal != SIGNAL_TYPE_EDP &&
+		link->connector_signal != SIGNAL_TYPE_DISPLAY_PORT))
+		return false;
+
+	if (core_link_write_dpcd(link, DP_SOURCE_BACKLIGHT_ENABLE,
+		&backlight_enable, 1) != DC_OK)
+		return false;
+
+	return true;
+}
+
+// we read default from 0x320 because we expect BIOS wrote it there
+// regular get_backlight_nit reads from panel set at 0x326
+static bool read_default_bl_aux(struct dc_link *link, uint32_t *backlight_millinits)
+{
+	if (!link || (link->connector_signal != SIGNAL_TYPE_EDP &&
+		link->connector_signal != SIGNAL_TYPE_DISPLAY_PORT))
+		return false;
+
+	if (!link->dpcd_caps.panel_luminance_control) {
+		if (!core_link_read_dpcd(link, DP_SOURCE_BACKLIGHT_LEVEL,
+			(uint8_t *)backlight_millinits,
+			sizeof(uint32_t)))
+			return false;
+	} else {
+		//setting to 0 as a precaution, since target_luminance_value is 3 bytes
+		memset(backlight_millinits, 0, sizeof(uint32_t));
+
+		if (!core_link_read_dpcd(link, DP_EDP_PANEL_TARGET_LUMINANCE_VALUE,
+			(uint8_t *)backlight_millinits,
+			sizeof(struct target_luminance_value)))
+			return false;
+	}
+
+	return true;
+}
+
+bool set_default_brightness_aux(struct dc_link *link)
+{
+	uint32_t default_backlight;
+
+	if (link && link->dpcd_sink_ext_caps.bits.oled == 1) {
+		if (!read_default_bl_aux(link, &default_backlight))
+			default_backlight = 150000;
+		// if < 1 nits or > 5000, it might be wrong readback
+		if (default_backlight < 1000 || default_backlight > 5000000)
+			default_backlight = 150000;
+
+		return edp_set_backlight_level_nits(link, true,
+				default_backlight, 0);
+	}
+	return false;
+}
+
+bool edp_is_ilr_optimization_enabled(struct dc_link *link)
+{
+	if (link->dpcd_caps.edp_supported_link_rates_count == 0 || !link->panel_config.ilr.optimize_edp_link_rate)
+		return false;
+	return true;
+}
+
+enum dc_link_rate get_max_link_rate_from_ilr_table(struct dc_link *link)
+{
+	enum dc_link_rate link_rate = link->reported_link_cap.link_rate;
+
+	for (int i = 0; i < link->dpcd_caps.edp_supported_link_rates_count; i++) {
+		if (link_rate < link->dpcd_caps.edp_supported_link_rates[i])
+			link_rate = link->dpcd_caps.edp_supported_link_rates[i];
+	}
+
+	return link_rate;
+}
+
+bool edp_is_ilr_optimization_required(struct dc_link *link,
+		struct dc_crtc_timing *crtc_timing)
+{
+	struct dc_link_settings link_setting;
+	uint8_t link_bw_set;
+	uint8_t link_rate_set;
+	uint32_t req_bw;
+	union lane_count_set lane_count_set = {0};
+
+	ASSERT(link || crtc_timing); // invalid input
+
+	if (!edp_is_ilr_optimization_enabled(link))
+		return false;
+
+
+	// Read DPCD 00100h to find if standard link rates are set
+	core_link_read_dpcd(link, DP_LINK_BW_SET,
+				&link_bw_set, sizeof(link_bw_set));
+
+	if (link_bw_set) {
+		DC_LOG_EVENT_LINK_TRAINING("eDP ILR: Optimization required, VBIOS used link_bw_set\n");
+		return true;
+	}
+
+	// Read DPCD 00115h to find the edp link rate set used
+	core_link_read_dpcd(link, DP_LINK_RATE_SET,
+			    &link_rate_set, sizeof(link_rate_set));
+
+	// Read DPCD 00101h to find out the number of lanes currently set
+	core_link_read_dpcd(link, DP_LANE_COUNT_SET,
+				&lane_count_set.raw, sizeof(lane_count_set));
+
+	req_bw = dc_bandwidth_in_kbps_from_timing(crtc_timing, dc_link_get_highest_encoding_format(link));
+
+	if (!crtc_timing->flags.DSC)
+		edp_decide_link_settings(link, &link_setting, req_bw);
+	else
+		decide_edp_link_settings_with_dsc(link, &link_setting, req_bw, LINK_RATE_UNKNOWN);
+
+	if (link->dpcd_caps.edp_supported_link_rates[link_rate_set] != link_setting.link_rate ||
+			lane_count_set.bits.LANE_COUNT_SET != link_setting.lane_count) {
+		DC_LOG_EVENT_LINK_TRAINING("eDP ILR: Optimization required, VBIOS link_rate_set not optimal\n");
+		return true;
+	}
+
+	DC_LOG_EVENT_LINK_TRAINING("eDP ILR: No optimization required, VBIOS set optimal link_rate_set\n");
+	return false;
+}
+
+void edp_panel_backlight_power_on(struct dc_link *link, bool wait_for_hpd)
+{
+	if (link->connector_signal != SIGNAL_TYPE_EDP)
+		return;
+
+	link->dc->hwss.edp_power_control(link, true);
+	if (wait_for_hpd)
+		link->dc->hwss.edp_wait_for_hpd_ready(link, true);
+	if (link->dc->hwss.edp_backlight_control)
+		link->dc->hwss.edp_backlight_control(link, true);
+}
+
+void edp_set_panel_power(struct dc_link *link, bool powerOn)
+{
+	if (powerOn) {
+		// 1. panel VDD on
+		if (!link->dc->config.edp_no_power_sequencing)
+			link->dc->hwss.edp_power_control(link, true);
+		link->dc->hwss.edp_wait_for_hpd_ready(link, true);
+
+		// 2. panel BL on
+		if (link->dc->hwss.edp_backlight_control)
+			link->dc->hwss.edp_backlight_control(link, true);
+
+		// 3. Rx power on
+		dpcd_write_rx_power_ctrl(link, true);
+	} else {
+		// 3. Rx power off
+		dpcd_write_rx_power_ctrl(link, false);
+
+		// 2. panel BL off
+		if (link->dc->hwss.edp_backlight_control)
+			link->dc->hwss.edp_backlight_control(link, false);
+
+		// 1. panel VDD off
+		if (!link->dc->config.edp_no_power_sequencing)
+			link->dc->hwss.edp_power_control(link, false);
+	}
+}
+
+bool edp_wait_for_t12(struct dc_link *link)
+{
+	if (link->connector_signal == SIGNAL_TYPE_EDP && link->dc->hwss.edp_wait_for_T12) {
+		link->dc->hwss.edp_wait_for_T12(link);
+
+		return true;
+	}
+
+	return false;
+}
+
+void edp_add_delay_for_T9(struct dc_link *link)
+{
+	if (link && link->panel_config.pps.extra_delay_backlight_off > 0)
+		fsleep(link->panel_config.pps.extra_delay_backlight_off * 1000);
+}
+
+bool edp_receiver_ready_T9(struct dc_link *link)
+{
+	unsigned int tries = 0;
+	unsigned char sinkstatus = 0;
+	unsigned char edpRev = 0;
+	enum dc_status result = DC_OK;
+
+	result = core_link_read_dpcd(link, DP_EDP_DPCD_REV, &edpRev, sizeof(edpRev));
+
+	/* start from eDP version 1.2, SINK_STAUS indicate the sink is ready.*/
+	if (result == DC_OK && edpRev >= DP_EDP_12) {
+		do {
+			sinkstatus = 1;
+			result = core_link_read_dpcd(link, DP_SINK_STATUS, &sinkstatus, sizeof(sinkstatus));
+			if (sinkstatus == 0)
+				break;
+			if (result != DC_OK)
+				break;
+			udelay(100); //MAx T9
+		} while (++tries < 50);
+	}
+
+	return result;
+}
+
+bool edp_receiver_ready_T7(struct dc_link *link)
+{
+	unsigned char sinkstatus = 0;
+	unsigned char edpRev = 0;
+	enum dc_status result = DC_OK;
+
+	/* use absolute time stamp to constrain max T7*/
+	unsigned long long enter_timestamp = 0;
+	unsigned long long finish_timestamp = 0;
+	unsigned long long time_taken_in_ns = 0;
+
+	result = core_link_read_dpcd(link, DP_EDP_DPCD_REV, &edpRev, sizeof(edpRev));
+
+	if (result == DC_OK && edpRev >= DP_EDP_12) {
+		/* start from eDP version 1.2, SINK_STAUS indicate the sink is ready.*/
+		enter_timestamp = dm_get_timestamp(link->ctx);
+		do {
+			sinkstatus = 0;
+			result = core_link_read_dpcd(link, DP_SINK_STATUS, &sinkstatus, sizeof(sinkstatus));
+			if (sinkstatus == 1)
+				break;
+			if (result != DC_OK)
+				break;
+			udelay(25);
+			finish_timestamp = dm_get_timestamp(link->ctx);
+			time_taken_in_ns = dm_get_elapse_time_in_ns(link->ctx, finish_timestamp, enter_timestamp);
+		} while (time_taken_in_ns < 50 * 1000000); //MAx T7 is 50ms
+	}
+
+	if (link && link->panel_config.pps.extra_t7_ms > 0)
+		fsleep(link->panel_config.pps.extra_t7_ms * 1000);
+
+	return result;
+}
+
+bool edp_power_alpm_dpcd_enable(struct dc_link *link, bool enable)
+{
+	bool ret = false;
+	union dpcd_alpm_configuration alpm_config;
+
+	if (link->psr_settings.psr_version == DC_PSR_VERSION_SU_1) {
+		memset(&alpm_config, 0, sizeof(alpm_config));
+
+		alpm_config.bits.ENABLE = (enable ? true : false);
+		ret = dm_helpers_dp_write_dpcd(link->ctx, link,
+				DP_RECEIVER_ALPM_CONFIG, &alpm_config.raw,
+				sizeof(alpm_config.raw));
+	}
+	return ret;
+}
+
+static struct pipe_ctx *get_pipe_from_link(const struct dc_link *link)
+{
+	int i;
+	struct dc *dc = link->ctx->dc;
+	struct pipe_ctx *pipe_ctx = NULL;
+
+	for (i = 0; i < MAX_PIPES; i++) {
+		if (dc->current_state->res_ctx.pipe_ctx[i].stream) {
+			if (dc->current_state->res_ctx.pipe_ctx[i].stream->link == link) {
+				pipe_ctx = &dc->current_state->res_ctx.pipe_ctx[i];
+				break;
+			}
+		}
+	}
+
+	return pipe_ctx;
+}
+
+bool edp_set_backlight_level(const struct dc_link *link,
+		uint32_t backlight_pwm_u16_16,
+		uint32_t frame_ramp)
+{
+	struct dc  *dc = link->ctx->dc;
+
+	DC_LOGGER_INIT(link->ctx->logger);
+	DC_LOG_BACKLIGHT("New Backlight level: %d (0x%X)\n",
+			backlight_pwm_u16_16, backlight_pwm_u16_16);
+
+	if (dc_is_embedded_signal(link->connector_signal)) {
+		struct pipe_ctx *pipe_ctx = get_pipe_from_link(link);
+
+		if (pipe_ctx) {
+			/* Disable brightness ramping when the display is blanked
+			 * as it can hang the DMCU
+			 */
+			if (pipe_ctx->plane_state == NULL)
+				frame_ramp = 0;
+		} else {
+			return false;
+		}
+
+		dc->hwss.set_backlight_level(
+				pipe_ctx,
+				backlight_pwm_u16_16,
+				frame_ramp);
+	}
+	return true;
+}
+
+bool edp_set_psr_allow_active(struct dc_link *link, const bool *allow_active,
+		bool wait, bool force_static, const unsigned int *power_opts)
+{
+	struct dc  *dc = link->ctx->dc;
+	struct dmcu *dmcu = dc->res_pool->dmcu;
+	struct dmub_psr *psr = dc->res_pool->psr;
+	unsigned int panel_inst;
+
+	if (psr == NULL && force_static)
+		return false;
+
+	if (!dc_get_edp_link_panel_inst(dc, link, &panel_inst))
+		return false;
+
+	if ((allow_active != NULL) && (*allow_active == true) && (link->type == dc_connection_none)) {
+		// Don't enter PSR if panel is not connected
+		return false;
+	}
+
+	/* Set power optimization flag */
+	if (power_opts && link->psr_settings.psr_power_opt != *power_opts) {
+		link->psr_settings.psr_power_opt = *power_opts;
+
+		if (psr != NULL && link->psr_settings.psr_feature_enabled && psr->funcs->psr_set_power_opt)
+			psr->funcs->psr_set_power_opt(psr, link->psr_settings.psr_power_opt, panel_inst);
+	}
+
+	if (psr != NULL && link->psr_settings.psr_feature_enabled &&
+			force_static && psr->funcs->psr_force_static)
+		psr->funcs->psr_force_static(psr, panel_inst);
+
+	/* Enable or Disable PSR */
+	if (allow_active && link->psr_settings.psr_allow_active != *allow_active) {
+		link->psr_settings.psr_allow_active = *allow_active;
+
+		if (!link->psr_settings.psr_allow_active)
+			dc_z10_restore(dc);
+
+		if (psr != NULL && link->psr_settings.psr_feature_enabled) {
+			psr->funcs->psr_enable(psr, link->psr_settings.psr_allow_active, wait, panel_inst);
+		} else if ((dmcu != NULL && dmcu->funcs->is_dmcu_initialized(dmcu)) &&
+			link->psr_settings.psr_feature_enabled)
+			dmcu->funcs->set_psr_enable(dmcu, link->psr_settings.psr_allow_active, wait);
+		else
+			return false;
+	}
+	return true;
+}
+
+bool edp_get_psr_state(const struct dc_link *link, enum dc_psr_state *state)
+{
+	struct dc  *dc = link->ctx->dc;
+	struct dmcu *dmcu = dc->res_pool->dmcu;
+	struct dmub_psr *psr = dc->res_pool->psr;
+	unsigned int panel_inst;
+
+	if (!dc_get_edp_link_panel_inst(dc, link, &panel_inst))
+		return false;
+
+	if (psr != NULL && link->psr_settings.psr_feature_enabled)
+		psr->funcs->psr_get_state(psr, state, panel_inst);
+	else if (dmcu != NULL && link->psr_settings.psr_feature_enabled)
+		dmcu->funcs->get_psr_state(dmcu, state);
+
+	return true;
+}
+
+static inline enum physical_phy_id
+transmitter_to_phy_id(struct dc_link *link)
+{
+	struct dc_context *dc_ctx = link->ctx;
+	enum transmitter transmitter_value = link->link_enc->transmitter;
+
+	switch (transmitter_value) {
+	case TRANSMITTER_UNIPHY_A:
+		return PHYLD_0;
+	case TRANSMITTER_UNIPHY_B:
+		return PHYLD_1;
+	case TRANSMITTER_UNIPHY_C:
+		return PHYLD_2;
+	case TRANSMITTER_UNIPHY_D:
+		return PHYLD_3;
+	case TRANSMITTER_UNIPHY_E:
+		return PHYLD_4;
+	case TRANSMITTER_UNIPHY_F:
+		return PHYLD_5;
+	case TRANSMITTER_NUTMEG_CRT:
+		return PHYLD_6;
+	case TRANSMITTER_TRAVIS_CRT:
+		return PHYLD_7;
+	case TRANSMITTER_TRAVIS_LCD:
+		return PHYLD_8;
+	case TRANSMITTER_UNIPHY_G:
+		return PHYLD_9;
+	case TRANSMITTER_COUNT:
+		return PHYLD_COUNT;
+	case TRANSMITTER_UNKNOWN:
+		return PHYLD_UNKNOWN;
+	default:
+		DC_ERROR("Unknown transmitter value %d\n", transmitter_value);
+		return PHYLD_UNKNOWN;
+	}
+}
+
+bool edp_setup_psr(struct dc_link *link,
+		const struct dc_stream_state *stream, struct psr_config *psr_config,
+		struct psr_context *psr_context)
+{
+	struct dc *dc;
+	struct dmcu *dmcu;
+	struct dmub_psr *psr;
+	int i;
+	unsigned int panel_inst;
+	/* updateSinkPsrDpcdConfig*/
+	union dpcd_psr_configuration psr_configuration;
+	union dpcd_sink_active_vtotal_control_mode vtotal_control = {0};
+
+	psr_context->controllerId = CONTROLLER_ID_UNDEFINED;
+
+	if (!link)
+		return false;
+
+	dc = link->ctx->dc;
+	dmcu = dc->res_pool->dmcu;
+	psr = dc->res_pool->psr;
+
+	if (!dmcu && !psr)
+		return false;
+
+	if (!dc_get_edp_link_panel_inst(dc, link, &panel_inst))
+		return false;
+
+
+	memset(&psr_configuration, 0, sizeof(psr_configuration));
+
+	psr_configuration.bits.ENABLE                    = 1;
+	psr_configuration.bits.CRC_VERIFICATION          = 1;
+	psr_configuration.bits.FRAME_CAPTURE_INDICATION  =
+			psr_config->psr_frame_capture_indication_req;
+
+	/* Check for PSR v2*/
+	if (link->psr_settings.psr_version == DC_PSR_VERSION_SU_1) {
+		/* For PSR v2 selective update.
+		 * Indicates whether sink should start capturing
+		 * immediately following active scan line,
+		 * or starting with the 2nd active scan line.
+		 */
+		psr_configuration.bits.LINE_CAPTURE_INDICATION = 0;
+		/*For PSR v2, determines whether Sink should generate
+		 * IRQ_HPD when CRC mismatch is detected.
+		 */
+		psr_configuration.bits.IRQ_HPD_WITH_CRC_ERROR    = 1;
+		/* For PSR v2, set the bit when the Source device will
+		 * be enabling PSR2 operation.
+		 */
+		psr_configuration.bits.ENABLE_PSR2    = 1;
+		/* For PSR v2, the Sink device must be able to receive
+		 * SU region updates early in the frame time.
+		 */
+		psr_configuration.bits.EARLY_TRANSPORT_ENABLE    = 1;
+	}
+
+	dm_helpers_dp_write_dpcd(
+		link->ctx,
+		link,
+		368,
+		&psr_configuration.raw,
+		sizeof(psr_configuration.raw));
+
+	if (link->psr_settings.psr_version == DC_PSR_VERSION_SU_1) {
+		edp_power_alpm_dpcd_enable(link, true);
+		psr_context->su_granularity_required =
+			psr_config->su_granularity_required;
+		psr_context->su_y_granularity =
+			psr_config->su_y_granularity;
+		psr_context->line_time_in_us = psr_config->line_time_in_us;
+
+		/* linux must be able to expose AMD Source DPCD definition
+		 * in order to support FreeSync PSR
+		 */
+		if (link->psr_settings.psr_vtotal_control_support) {
+			psr_context->rate_control_caps = psr_config->rate_control_caps;
+			vtotal_control.bits.ENABLE = true;
+			core_link_write_dpcd(link, DP_SINK_PSR_ACTIVE_VTOTAL_CONTROL_MODE,
+							&vtotal_control.raw, sizeof(vtotal_control.raw));
+		}
+	}
+
+	psr_context->channel = link->ddc->ddc_pin->hw_info.ddc_channel;
+	psr_context->transmitterId = link->link_enc->transmitter;
+	psr_context->engineId = link->link_enc->preferred_engine;
+
+	for (i = 0; i < MAX_PIPES; i++) {
+		if (dc->current_state->res_ctx.pipe_ctx[i].stream
+				== stream) {
+			/* dmcu -1 for all controller id values,
+			 * therefore +1 here
+			 */
+			psr_context->controllerId =
+				dc->current_state->res_ctx.
+				pipe_ctx[i].stream_res.tg->inst + 1;
+			break;
+		}
+	}
+
+	/* Hardcoded for now.  Can be Pcie or Uniphy (or Unknown)*/
+	psr_context->phyType = PHY_TYPE_UNIPHY;
+	/*PhyId is associated with the transmitter id*/
+	psr_context->smuPhyId = transmitter_to_phy_id(link);
+
+	psr_context->crtcTimingVerticalTotal = stream->timing.v_total;
+	psr_context->vsync_rate_hz = div64_u64(div64_u64((stream->
+					timing.pix_clk_100hz * 100),
+					stream->timing.v_total),
+					stream->timing.h_total);
+
+	psr_context->psrSupportedDisplayConfig = true;
+	psr_context->psrExitLinkTrainingRequired =
+		psr_config->psr_exit_link_training_required;
+	psr_context->sdpTransmitLineNumDeadline =
+		psr_config->psr_sdp_transmit_line_num_deadline;
+	psr_context->psrFrameCaptureIndicationReq =
+		psr_config->psr_frame_capture_indication_req;
+
+	psr_context->skipPsrWaitForPllLock = 0; /* only = 1 in KV */
+
+	psr_context->numberOfControllers =
+			link->dc->res_pool->timing_generator_count;
+
+	psr_context->rfb_update_auto_en = true;
+
+	/* 2 frames before enter PSR. */
+	psr_context->timehyst_frames = 2;
+	/* half a frame
+	 * (units in 100 lines, i.e. a value of 1 represents 100 lines)
+	 */
+	psr_context->hyst_lines = stream->timing.v_total / 2 / 100;
+	psr_context->aux_repeats = 10;
+
+	psr_context->psr_level.u32all = 0;
+
+	/*skip power down the single pipe since it blocks the cstate*/
+	if (link->ctx->asic_id.chip_family >= FAMILY_RV) {
+		switch (link->ctx->asic_id.chip_family) {
+		case FAMILY_YELLOW_CARP:
+		case AMDGPU_FAMILY_GC_10_3_6:
+		case AMDGPU_FAMILY_GC_11_0_1:
+			if (dc->debug.disable_z10 || dc->debug.psr_skip_crtc_disable)
+				psr_context->psr_level.bits.SKIP_CRTC_DISABLE = true;
+			break;
+		default:
+			psr_context->psr_level.bits.SKIP_CRTC_DISABLE = true;
+			break;
+		}
+	}
+
+	/* SMU will perform additional powerdown sequence.
+	 * For unsupported ASICs, set psr_level flag to skip PSR
+	 *  static screen notification to SMU.
+	 *  (Always set for DAL2, did not check ASIC)
+	 */
+	psr_context->allow_smu_optimizations = psr_config->allow_smu_optimizations;
+	psr_context->allow_multi_disp_optimizations = psr_config->allow_multi_disp_optimizations;
+
+	/* Complete PSR entry before aborting to prevent intermittent
+	 * freezes on certain eDPs
+	 */
+	psr_context->psr_level.bits.DISABLE_PSR_ENTRY_ABORT = 1;
+
+	/* Disable ALPM first for compatible non-ALPM panel now */
+	psr_context->psr_level.bits.DISABLE_ALPM = 0;
+	psr_context->psr_level.bits.ALPM_DEFAULT_PD_MODE = 1;
+
+	/* Controls additional delay after remote frame capture before
+	 * continuing power down, default = 0
+	 */
+	psr_context->frame_delay = 0;
+
+	psr_context->dsc_slice_height = psr_config->dsc_slice_height;
+
+	if (psr) {
+		link->psr_settings.psr_feature_enabled = psr->funcs->psr_copy_settings(psr,
+			link, psr_context, panel_inst);
+		link->psr_settings.psr_power_opt = 0;
+		link->psr_settings.psr_allow_active = 0;
+	} else {
+		link->psr_settings.psr_feature_enabled = dmcu->funcs->setup_psr(dmcu, link, psr_context);
+	}
+
+	/* psr_enabled == 0 indicates setup_psr did not succeed, but this
+	 * should not happen since firmware should be running at this point
+	 */
+	if (link->psr_settings.psr_feature_enabled == 0)
+		ASSERT(0);
+
+	return true;
+
+}
+
+void edp_get_psr_residency(const struct dc_link *link, uint32_t *residency)
+{
+	struct dc  *dc = link->ctx->dc;
+	struct dmub_psr *psr = dc->res_pool->psr;
+	unsigned int panel_inst;
+
+	if (!dc_get_edp_link_panel_inst(dc, link, &panel_inst))
+		return;
+
+	// PSR residency measurements only supported on DMCUB
+	if (psr != NULL && link->psr_settings.psr_feature_enabled)
+		psr->funcs->psr_get_residency(psr, residency, panel_inst);
+	else
+		*residency = 0;
+}
+bool edp_set_sink_vtotal_in_psr_active(const struct dc_link *link, uint16_t psr_vtotal_idle, uint16_t psr_vtotal_su)
+{
+	struct dc *dc = link->ctx->dc;
+	struct dmub_psr *psr = dc->res_pool->psr;
+
+	if (psr == NULL || !link->psr_settings.psr_feature_enabled || !link->psr_settings.psr_vtotal_control_support)
+		return false;
+
+	psr->funcs->psr_set_sink_vtotal_in_psr_active(psr, psr_vtotal_idle, psr_vtotal_su);
+
+	return true;
+}
+
+bool edp_set_replay_allow_active(struct dc_link *link, const bool *allow_active,
+	bool wait, bool force_static, const unsigned int *power_opts)
+{
+	struct dc  *dc = link->ctx->dc;
+	struct dmub_replay *replay = dc->res_pool->replay;
+	unsigned int panel_inst;
+
+	if (replay == NULL && force_static)
+		return false;
+
+	if (!dc_get_edp_link_panel_inst(dc, link, &panel_inst))
+		return false;
+
+	/* Set power optimization flag */
+	if (power_opts && link->replay_settings.replay_power_opt_active != *power_opts) {
+		if (link->replay_settings.replay_feature_enabled && replay->funcs->replay_set_power_opt) {
+			replay->funcs->replay_set_power_opt(replay, *power_opts, panel_inst);
+			link->replay_settings.replay_power_opt_active = *power_opts;
+		}
+	}
+
+	/* Activate or deactivate Replay */
+	if (allow_active && link->replay_settings.replay_allow_active != *allow_active) {
+		// TODO: Handle mux change case if force_static is set
+		// If force_static is set, just change the replay_allow_active state directly
+		if (replay != NULL && link->replay_settings.replay_feature_enabled)
+			replay->funcs->replay_enable(replay, *allow_active, wait, panel_inst);
+		link->replay_settings.replay_allow_active = *allow_active;
+	}
+
+	return true;
+}
+
+bool edp_get_replay_state(const struct dc_link *link, uint64_t *state)
+{
+	struct dc  *dc = link->ctx->dc;
+	struct dmub_replay *replay = dc->res_pool->replay;
+	unsigned int panel_inst;
+	enum replay_state pr_state = REPLAY_STATE_0;
+
+	if (!dc_get_edp_link_panel_inst(dc, link, &panel_inst))
+		return false;
+
+	if (replay != NULL && link->replay_settings.replay_feature_enabled)
+		replay->funcs->replay_get_state(replay, &pr_state, panel_inst);
+	*state = pr_state;
+
+	return true;
+}
+
+bool edp_setup_replay(struct dc_link *link, const struct dc_stream_state *stream)
+{
+	/* To-do: Setup Replay */
+	struct dc *dc;
+	struct dmub_replay *replay;
+	int i;
+	unsigned int panel_inst;
+	struct replay_context replay_context = { 0 };
+	unsigned int lineTimeInNs = 0;
+
+
+	union replay_enable_and_configuration replay_config;
+
+	union dpcd_alpm_configuration alpm_config;
+
+	replay_context.controllerId = CONTROLLER_ID_UNDEFINED;
+
+	if (!link)
+		return false;
+
+	dc = link->ctx->dc;
+
+	replay = dc->res_pool->replay;
+
+	if (!replay)
+		return false;
+
+	if (!dc_get_edp_link_panel_inst(dc, link, &panel_inst))
+		return false;
+
+	replay_context.aux_inst = link->ddc->ddc_pin->hw_info.ddc_channel;
+	replay_context.digbe_inst = link->link_enc->transmitter;
+	replay_context.digfe_inst = link->link_enc->preferred_engine;
+
+	for (i = 0; i < MAX_PIPES; i++) {
+		if (dc->current_state->res_ctx.pipe_ctx[i].stream
+				== stream) {
+			/* dmcu -1 for all controller id values,
+			 * therefore +1 here
+			 */
+			replay_context.controllerId =
+				dc->current_state->res_ctx.pipe_ctx[i].stream_res.tg->inst + 1;
+			break;
+		}
+	}
+
+	lineTimeInNs =
+		((stream->timing.h_total * 1000000) /
+			(stream->timing.pix_clk_100hz / 10)) + 1;
+
+	replay_context.line_time_in_ns = lineTimeInNs;
+
+	link->replay_settings.replay_feature_enabled =
+			replay->funcs->replay_copy_settings(replay, link, &replay_context, panel_inst);
+	if (link->replay_settings.replay_feature_enabled) {
+
+		replay_config.bits.FREESYNC_PANEL_REPLAY_MODE = 1;
+		replay_config.bits.TIMING_DESYNC_ERROR_VERIFICATION =
+			link->replay_settings.config.replay_timing_sync_supported;
+		replay_config.bits.STATE_TRANSITION_ERROR_DETECTION = 1;
+		dm_helpers_dp_write_dpcd(link->ctx, link,
+			DP_SINK_PR_ENABLE_AND_CONFIGURATION,
+			(uint8_t *)&(replay_config.raw), sizeof(uint8_t));
+
+		memset(&alpm_config, 0, sizeof(alpm_config));
+		alpm_config.bits.ENABLE = 1;
+		dm_helpers_dp_write_dpcd(
+			link->ctx,
+			link,
+			DP_RECEIVER_ALPM_CONFIG,
+			&alpm_config.raw,
+			sizeof(alpm_config.raw));
+	}
+	return true;
+}
+
+bool edp_set_coasting_vtotal(struct dc_link *link, uint16_t coasting_vtotal)
+{
+	struct dc *dc = link->ctx->dc;
+	struct dmub_replay *replay = dc->res_pool->replay;
+	unsigned int panel_inst;
+
+	if (!replay)
+		return false;
+
+	if (!dc_get_edp_link_panel_inst(dc, link, &panel_inst))
+		return false;
+
+	if (coasting_vtotal && link->replay_settings.coasting_vtotal != coasting_vtotal) {
+		replay->funcs->replay_set_coasting_vtotal(replay, coasting_vtotal, panel_inst);
+		link->replay_settings.coasting_vtotal = coasting_vtotal;
+	}
+
+	return true;
+}
+
+bool edp_replay_residency(const struct dc_link *link,
+	unsigned int *residency, const bool is_start, const bool is_alpm)
+{
+	struct dc  *dc = link->ctx->dc;
+	struct dmub_replay *replay = dc->res_pool->replay;
+	unsigned int panel_inst;
+
+	if (!dc_get_edp_link_panel_inst(dc, link, &panel_inst))
+		return false;
+
+	if (replay != NULL && link->replay_settings.replay_feature_enabled)
+		replay->funcs->replay_residency(replay, panel_inst, residency, is_start, is_alpm);
+	else
+		*residency = 0;
+
+	return true;
+}
+
+static struct abm *get_abm_from_stream_res(const struct dc_link *link)
+{
+	int i;
+	struct dc *dc = link->ctx->dc;
+	struct abm *abm = NULL;
+
+	for (i = 0; i < MAX_PIPES; i++) {
+		struct pipe_ctx pipe_ctx = dc->current_state->res_ctx.pipe_ctx[i];
+		struct dc_stream_state *stream = pipe_ctx.stream;
+
+		if (stream && stream->link == link) {
+			abm = pipe_ctx.stream_res.abm;
+			break;
+		}
+	}
+	return abm;
+}
+
+int edp_get_backlight_level(const struct dc_link *link)
+{
+	struct abm *abm = get_abm_from_stream_res(link);
+	struct panel_cntl *panel_cntl = link->panel_cntl;
+	struct dc  *dc = link->ctx->dc;
+	struct dmcu *dmcu = dc->res_pool->dmcu;
+	bool fw_set_brightness = true;
+
+	if (dmcu)
+		fw_set_brightness = dmcu->funcs->is_dmcu_initialized(dmcu);
+
+	if (!fw_set_brightness && panel_cntl->funcs->get_current_backlight)
+		return panel_cntl->funcs->get_current_backlight(panel_cntl);
+	else if (abm != NULL && abm->funcs->get_current_backlight != NULL)
+		return (int) abm->funcs->get_current_backlight(abm);
+	else
+		return DC_ERROR_UNEXPECTED;
+}
+
+int edp_get_target_backlight_pwm(const struct dc_link *link)
+{
+	struct abm *abm = get_abm_from_stream_res(link);
+
+	if (abm == NULL || abm->funcs->get_target_backlight == NULL)
+		return DC_ERROR_UNEXPECTED;
+
+	return (int) abm->funcs->get_target_backlight(abm);
+}
diff --git a/drivers/gpu/drm/amd/display/dc/link/protocols/link_edp_panel_control.h b/drivers/gpu/drm/amd/display/dc/link/protocols/link_edp_panel_control.h
new file mode 100644
index 000000000..a034288ad
--- /dev/null
+++ b/drivers/gpu/drm/amd/display/dc/link/protocols/link_edp_panel_control.h
@@ -0,0 +1,74 @@
+/*
+ * Copyright 2022 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 __DC_LINK_EDP_PANEL_CONTROL_H__
+#define __DC_LINK_EDP_PANEL_CONTROL_H__
+#include "link.h"
+
+enum dp_panel_mode dp_get_panel_mode(struct dc_link *link);
+void dp_set_panel_mode(struct dc_link *link, enum dp_panel_mode panel_mode);
+bool set_default_brightness_aux(struct dc_link *link);
+void edp_panel_backlight_power_on(struct dc_link *link, bool wait_for_hpd);
+int edp_get_backlight_level(const struct dc_link *link);
+bool edp_get_backlight_level_nits(struct dc_link *link,
+		uint32_t *backlight_millinits_avg,
+		uint32_t *backlight_millinits_peak);
+bool edp_set_backlight_level(const struct dc_link *link,
+		uint32_t backlight_pwm_u16_16,
+		uint32_t frame_ramp);
+bool edp_set_backlight_level_nits(struct dc_link *link,
+		bool isHDR,
+		uint32_t backlight_millinits,
+		uint32_t transition_time_in_ms);
+int edp_get_target_backlight_pwm(const struct dc_link *link);
+bool edp_get_psr_state(const struct dc_link *link, enum dc_psr_state *state);
+bool edp_set_psr_allow_active(struct dc_link *link, const bool *allow_active,
+		bool wait, bool force_static, const unsigned int *power_opts);
+bool edp_setup_psr(struct dc_link *link,
+		const struct dc_stream_state *stream, struct psr_config *psr_config,
+		struct psr_context *psr_context);
+bool edp_set_sink_vtotal_in_psr_active(const struct dc_link *link,
+       uint16_t psr_vtotal_idle, uint16_t psr_vtotal_su);
+void edp_get_psr_residency(const struct dc_link *link, uint32_t *residency);
+bool edp_set_replay_allow_active(struct dc_link *dc_link, const bool *enable,
+	bool wait, bool force_static, const unsigned int *power_opts);
+bool edp_setup_replay(struct dc_link *link,
+		const struct dc_stream_state *stream);
+bool edp_set_coasting_vtotal(struct dc_link *link, uint16_t coasting_vtotal);
+bool edp_replay_residency(const struct dc_link *link,
+	unsigned int *residency, const bool is_start, const bool is_alpm);
+bool edp_get_replay_state(const struct dc_link *link, uint64_t *state);
+bool edp_wait_for_t12(struct dc_link *link);
+bool edp_is_ilr_optimization_required(struct dc_link *link,
+       struct dc_crtc_timing *crtc_timing);
+bool edp_is_ilr_optimization_enabled(struct dc_link *link);
+enum dc_link_rate get_max_link_rate_from_ilr_table(struct dc_link *link);
+bool edp_backlight_enable_aux(struct dc_link *link, bool enable);
+void edp_add_delay_for_T9(struct dc_link *link);
+bool edp_receiver_ready_T9(struct dc_link *link);
+bool edp_receiver_ready_T7(struct dc_link *link);
+bool edp_power_alpm_dpcd_enable(struct dc_link *link, bool enable);
+void edp_set_panel_power(struct dc_link *link, bool powerOn);
+#endif /* __DC_LINK_EDP_POWER_CONTROL_H__ */
diff --git a/drivers/gpu/drm/amd/display/dc/link/protocols/link_hpd.c b/drivers/gpu/drm/amd/display/dc/link/protocols/link_hpd.c
new file mode 100644
index 000000000..e3d729ab5
--- /dev/null
+++ b/drivers/gpu/drm/amd/display/dc/link/protocols/link_hpd.c
@@ -0,0 +1,240 @@
+/*
+ * Copyright 2022 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
+ *
+ */
+
+/* FILE POLICY AND INTENDED USAGE:
+ *
+ * This file implements functions that manage basic HPD components such as gpio.
+ * It also provides wrapper functions to execute HPD related programming. This
+ * file only manages basic HPD functionality. It doesn't manage detection or
+ * feature or signal specific HPD behaviors.
+ */
+#include "link_hpd.h"
+#include "gpio_service_interface.h"
+
+bool link_get_hpd_state(struct dc_link *link)
+{
+	uint32_t state;
+
+	dal_gpio_lock_pin(link->hpd_gpio);
+	dal_gpio_get_value(link->hpd_gpio, &state);
+	dal_gpio_unlock_pin(link->hpd_gpio);
+
+	return state;
+}
+
+void link_enable_hpd(const struct dc_link *link)
+{
+	struct link_encoder *encoder = link->link_enc;
+
+	if (encoder != NULL && encoder->funcs->enable_hpd != NULL)
+		encoder->funcs->enable_hpd(encoder);
+}
+
+void link_disable_hpd(const struct dc_link *link)
+{
+	struct link_encoder *encoder = link->link_enc;
+
+	if (encoder != NULL && encoder->funcs->enable_hpd != NULL)
+		encoder->funcs->disable_hpd(encoder);
+}
+
+void link_enable_hpd_filter(struct dc_link *link, bool enable)
+{
+	struct gpio *hpd;
+
+	if (enable) {
+		link->is_hpd_filter_disabled = false;
+		program_hpd_filter(link);
+	} else {
+		link->is_hpd_filter_disabled = true;
+		/* Obtain HPD handle */
+		hpd = link_get_hpd_gpio(link->ctx->dc_bios, link->link_id, link->ctx->gpio_service);
+
+		if (!hpd)
+			return;
+
+		/* Setup HPD filtering */
+		if (dal_gpio_open(hpd, GPIO_MODE_INTERRUPT) == GPIO_RESULT_OK) {
+			struct gpio_hpd_config config;
+
+			config.delay_on_connect = 0;
+			config.delay_on_disconnect = 0;
+
+			dal_irq_setup_hpd_filter(hpd, &config);
+
+			dal_gpio_close(hpd);
+		} else {
+			ASSERT_CRITICAL(false);
+		}
+		/* Release HPD handle */
+		dal_gpio_destroy_irq(&hpd);
+	}
+}
+
+struct gpio *link_get_hpd_gpio(struct dc_bios *dcb,
+			  struct graphics_object_id link_id,
+			  struct gpio_service *gpio_service)
+{
+	enum bp_result bp_result;
+	struct graphics_object_hpd_info hpd_info;
+	struct gpio_pin_info pin_info;
+
+	if (dcb->funcs->get_hpd_info(dcb, link_id, &hpd_info) != BP_RESULT_OK)
+		return NULL;
+
+	bp_result = dcb->funcs->get_gpio_pin_info(dcb,
+		hpd_info.hpd_int_gpio_uid, &pin_info);
+
+	if (bp_result != BP_RESULT_OK) {
+		ASSERT(bp_result == BP_RESULT_NORECORD);
+		return NULL;
+	}
+
+	return dal_gpio_service_create_irq(gpio_service,
+					   pin_info.offset,
+					   pin_info.mask);
+}
+
+bool query_hpd_status(struct dc_link *link, uint32_t *is_hpd_high)
+{
+	struct gpio *hpd_pin = link_get_hpd_gpio(
+			link->ctx->dc_bios, link->link_id,
+			link->ctx->gpio_service);
+	if (!hpd_pin)
+		return false;
+
+	dal_gpio_open(hpd_pin, GPIO_MODE_INTERRUPT);
+	dal_gpio_get_value(hpd_pin, is_hpd_high);
+	dal_gpio_close(hpd_pin);
+	dal_gpio_destroy_irq(&hpd_pin);
+	return true;
+}
+
+enum hpd_source_id get_hpd_line(struct dc_link *link)
+{
+	struct gpio *hpd;
+	enum hpd_source_id hpd_id;
+
+		hpd_id = HPD_SOURCEID_UNKNOWN;
+
+	hpd = link_get_hpd_gpio(link->ctx->dc_bios, link->link_id,
+			   link->ctx->gpio_service);
+
+	if (hpd) {
+		switch (dal_irq_get_source(hpd)) {
+		case DC_IRQ_SOURCE_HPD1:
+			hpd_id = HPD_SOURCEID1;
+		break;
+		case DC_IRQ_SOURCE_HPD2:
+			hpd_id = HPD_SOURCEID2;
+		break;
+		case DC_IRQ_SOURCE_HPD3:
+			hpd_id = HPD_SOURCEID3;
+		break;
+		case DC_IRQ_SOURCE_HPD4:
+			hpd_id = HPD_SOURCEID4;
+		break;
+		case DC_IRQ_SOURCE_HPD5:
+			hpd_id = HPD_SOURCEID5;
+		break;
+		case DC_IRQ_SOURCE_HPD6:
+			hpd_id = HPD_SOURCEID6;
+		break;
+		default:
+			BREAK_TO_DEBUGGER();
+		break;
+		}
+
+		dal_gpio_destroy_irq(&hpd);
+	}
+
+	return hpd_id;
+}
+
+bool program_hpd_filter(const struct dc_link *link)
+{
+	bool result = false;
+	struct gpio *hpd;
+	int delay_on_connect_in_ms = 0;
+	int delay_on_disconnect_in_ms = 0;
+
+	if (link->is_hpd_filter_disabled)
+		return false;
+	/* Verify feature is supported */
+	switch (link->connector_signal) {
+	case SIGNAL_TYPE_DVI_SINGLE_LINK:
+	case SIGNAL_TYPE_DVI_DUAL_LINK:
+	case SIGNAL_TYPE_HDMI_TYPE_A:
+		/* Program hpd filter */
+		delay_on_connect_in_ms = 500;
+		delay_on_disconnect_in_ms = 100;
+		break;
+	case SIGNAL_TYPE_DISPLAY_PORT:
+	case SIGNAL_TYPE_DISPLAY_PORT_MST:
+		/* Program hpd filter to allow DP signal to settle */
+		/* 500:	not able to detect MST <-> SST switch as HPD is low for
+		 * only 100ms on DELL U2413
+		 * 0: some passive dongle still show aux mode instead of i2c
+		 * 20-50: not enough to hide bouncing HPD with passive dongle.
+		 * also see intermittent i2c read issues.
+		 */
+		delay_on_connect_in_ms = 80;
+		delay_on_disconnect_in_ms = 0;
+		break;
+	case SIGNAL_TYPE_LVDS:
+	case SIGNAL_TYPE_EDP:
+	default:
+		/* Don't program hpd filter */
+		return false;
+	}
+
+	/* Obtain HPD handle */
+	hpd = link_get_hpd_gpio(link->ctx->dc_bios, link->link_id,
+			   link->ctx->gpio_service);
+
+	if (!hpd)
+		return result;
+
+	/* Setup HPD filtering */
+	if (dal_gpio_open(hpd, GPIO_MODE_INTERRUPT) == GPIO_RESULT_OK) {
+		struct gpio_hpd_config config;
+
+		config.delay_on_connect = delay_on_connect_in_ms;
+		config.delay_on_disconnect = delay_on_disconnect_in_ms;
+
+		dal_irq_setup_hpd_filter(hpd, &config);
+
+		dal_gpio_close(hpd);
+
+		result = true;
+	} else {
+		ASSERT_CRITICAL(false);
+	}
+
+	/* Release HPD handle */
+	dal_gpio_destroy_irq(&hpd);
+
+	return result;
+}
diff --git a/drivers/gpu/drm/amd/display/dc/link/protocols/link_hpd.h b/drivers/gpu/drm/amd/display/dc/link/protocols/link_hpd.h
new file mode 100644
index 000000000..4fb526b26
--- /dev/null
+++ b/drivers/gpu/drm/amd/display/dc/link/protocols/link_hpd.h
@@ -0,0 +1,54 @@
+/*
+ * Copyright 2022 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 __DC_LINK_HPD_H__
+#define __DC_LINK_HPD_H__
+#include "link.h"
+
+enum hpd_source_id get_hpd_line(struct dc_link *link);
+/*
+ *  Function: program_hpd_filter
+ *
+ *  @brief
+ *     Programs HPD filter on associated HPD line to default values.
+ *
+ *  @return
+ *     true on success, false otherwise
+ */
+bool program_hpd_filter(const struct dc_link *link);
+/* Query hot plug status of USB4 DP tunnel.
+ * Returns true if HPD high.
+ */
+bool dpia_query_hpd_status(struct dc_link *link);
+bool query_hpd_status(struct dc_link *link, uint32_t *is_hpd_high);
+bool link_get_hpd_state(struct dc_link *link);
+struct gpio *link_get_hpd_gpio(struct dc_bios *dcb,
+		struct graphics_object_id link_id,
+		struct gpio_service *gpio_service);
+void link_enable_hpd(const struct dc_link *link);
+void link_disable_hpd(const struct dc_link *link);
+void link_enable_hpd_filter(struct dc_link *link, bool enable);
+#endif /* __DC_LINK_HPD_H__ */