drm/amd/display: Add DP 2.0 HPO Link Encoder

HW Blocks:

        +--------+  +-----+  +------+
        |  OPTC  |  | HDA |  | HUBP |
        +--------+  +-----+  +------+
            |          |        |
            |          |        |
    HPO ====|==========|========|====
     |      |          v        |
     |      |       +-----+     |
     |      |       | APG |     |
     |      |       +-----+     |
     |      |          |        |
     |      v          v        v
     |     +---------------------+
     |     |  HPO Stream Encoder |
     |     +---------------------+
     |                 |
     |                 v
     |      +--------------------+
     |      |  HPO Link Encoder  |
     v      +--------------------+

[squash in warning fixes - Alex]
Signed-off-by: Fangzhi Zuo <Jerry.Zuo@amd.com>
Reviewed-by: Nicholas Kazlauskas <Nicholas.Kazlauskas@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/display/dc/dc_link.h

@@ -45,6 +45,10 @@ struct dc_link_status {
 struct link_mst_stream_allocation {
 	/* DIG front */
 	const struct stream_encoder *stream_enc;
+#if defined(CONFIG_DRM_AMD_DC_DCN)
+	/* HPO DP Stream Encoder */
+	const struct hpo_dp_stream_encoder *hpo_dp_stream_enc;
+#endif
 	/* associate DRM payload table with DC stream encoder */
 	uint8_t vcp_id;
 	/* number of slots required for the DP stream in transport packet */

drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.c

@@ -497,6 +497,38 @@ void dcn10_log_hw_state(struct dc *dc,
 
 			DTN_INFO("\n");
 		}
+
+		/* log DP HPO L_ENC section if any hpo_dp_link_enc exists */
+		for (i = 0; i < dc->link_count; i++)
+			if (dc->links[i]->hpo_dp_link_enc)
+				hpo_dp_link_enc_count++;
+
+		if (hpo_dp_link_enc_count) {
+			DTN_INFO("DP HPO L_ENC:  Enabled  Mode   Lanes   Stream  Slots   VC Rate X    VC Rate Y\n");
+
+			for (i = 0; i < dc->link_count; i++) {
+				struct hpo_dp_link_encoder *hpo_dp_link_enc = dc->links[i]->hpo_dp_link_enc;
+				struct hpo_dp_link_enc_state hpo_dp_le_state = {0};
+
+				if (hpo_dp_link_enc && hpo_dp_link_enc->funcs->read_state) {
+					hpo_dp_link_enc->funcs->read_state(hpo_dp_link_enc, &hpo_dp_le_state);
+					DTN_INFO("[%d]:                 %d  %6s     %d        %d      %d     %d     %d\n",
+							hpo_dp_link_enc->inst,
+							hpo_dp_le_state.link_enc_enabled,
+							(hpo_dp_le_state.link_mode == 0) ? "TPS1" :
+									(hpo_dp_le_state.link_mode == 1) ? "TPS2" :
+									(hpo_dp_le_state.link_mode == 2) ? "ACTIVE" : "TEST",
+							hpo_dp_le_state.lane_count,
+							hpo_dp_le_state.stream_src[0],
+							hpo_dp_le_state.slot_count[0],
+							hpo_dp_le_state.vc_rate_x[0],
+							hpo_dp_le_state.vc_rate_y[0]);
+					DTN_INFO("\n");
+				}
+			}
+
+			DTN_INFO("\n");
+		}
 	}
 
 	DTN_INFO_END();

drivers/gpu/drm/amd/display/dc/dcn31/Makefile

@@ -12,7 +12,7 @@
 
 DCN31 = dcn31_resource.o dcn31_hubbub.o dcn31_hwseq.o dcn31_init.o dcn31_hubp.o \
 	dcn31_dccg.o dcn31_optc.o dcn31_dio_link_encoder.o dcn31_panel_cntl.o \
-	dcn31_apg.o dcn31_hpo_dp_stream_encoder.o
+	dcn31_apg.o dcn31_hpo_dp_stream_encoder.o dcn31_hpo_dp_link_encoder.o
 
 ifdef CONFIG_X86
 CFLAGS_$(AMDDALPATH)/dc/dcn31/dcn31_resource.o := -msse

drivers/gpu/drm/amd/display/dc/dcn31/dcn31_dio_link_encoder.c

@@ -320,6 +320,10 @@ void dcn31_link_encoder_construct(
 		enc10->base.features.flags.bits.IS_HBR3_CAPABLE =
 				bp_cap_info.DP_HBR3_EN;
 		enc10->base.features.flags.bits.HDMI_6GB_EN = bp_cap_info.HDMI_6GB_EN;
+		enc10->base.features.flags.bits.IS_DP2_CAPABLE = bp_cap_info.IS_DP2_CAPABLE;
+		enc10->base.features.flags.bits.IS_UHBR10_CAPABLE = bp_cap_info.DP_UHBR10_EN;
+		enc10->base.features.flags.bits.IS_UHBR13_5_CAPABLE = bp_cap_info.DP_UHBR13_5_EN;
+		enc10->base.features.flags.bits.IS_UHBR20_CAPABLE = bp_cap_info.DP_UHBR20_EN;
 		enc10->base.features.flags.bits.DP_IS_USB_C =
 				bp_cap_info.DP_IS_USB_C;
 	} else {

drivers/gpu/drm/amd/display/dc/dcn31/dcn31_hpo_dp_link_encoder.h

+/*
+ * Copyright 2019 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_DCN31_HPO_DP_LINK_ENCODER_H__
+#define __DAL_DCN31_HPO_DP_LINK_ENCODER_H__
+
+#include "link_encoder.h"
+
+
+#define DCN3_1_HPO_DP_LINK_ENC_FROM_HPO_LINK_ENC(hpo_dp_link_encoder)\
+	container_of(hpo_dp_link_encoder, struct dcn31_hpo_dp_link_encoder, base)
+
+
+#define DCN3_1_HPO_DP_LINK_ENC_REG_LIST(id) \
+	SRI(DP_LINK_ENC_CLOCK_CONTROL, DP_LINK_ENC, id), \
+	SRI(DP_DPHY_SYM32_CONTROL, DP_DPHY_SYM32, id), \
+	SRI(DP_DPHY_SYM32_STATUS, DP_DPHY_SYM32, id), \
+	SRI(DP_DPHY_SYM32_TP_CONFIG, DP_DPHY_SYM32, id), \
+	SRI(DP_DPHY_SYM32_TP_PRBS_SEED0, DP_DPHY_SYM32, id), \
+	SRI(DP_DPHY_SYM32_TP_PRBS_SEED1, DP_DPHY_SYM32, id), \
+	SRI(DP_DPHY_SYM32_TP_PRBS_SEED2, DP_DPHY_SYM32, id), \
+	SRI(DP_DPHY_SYM32_TP_PRBS_SEED3, DP_DPHY_SYM32, id), \
+	SRI(DP_DPHY_SYM32_TP_SQ_PULSE, DP_DPHY_SYM32, id), \
+	SRI(DP_DPHY_SYM32_TP_CUSTOM0, DP_DPHY_SYM32, id), \
+	SRI(DP_DPHY_SYM32_TP_CUSTOM1, DP_DPHY_SYM32, id), \
+	SRI(DP_DPHY_SYM32_TP_CUSTOM2, DP_DPHY_SYM32, id), \
+	SRI(DP_DPHY_SYM32_TP_CUSTOM3, DP_DPHY_SYM32, id), \
+	SRI(DP_DPHY_SYM32_TP_CUSTOM4, DP_DPHY_SYM32, id), \
+	SRI(DP_DPHY_SYM32_TP_CUSTOM5, DP_DPHY_SYM32, id), \
+	SRI(DP_DPHY_SYM32_TP_CUSTOM6, DP_DPHY_SYM32, id), \
+	SRI(DP_DPHY_SYM32_TP_CUSTOM7, DP_DPHY_SYM32, id), \
+	SRI(DP_DPHY_SYM32_TP_CUSTOM8, DP_DPHY_SYM32, id), \
+	SRI(DP_DPHY_SYM32_TP_CUSTOM9, DP_DPHY_SYM32, id), \
+	SRI(DP_DPHY_SYM32_TP_CUSTOM10, DP_DPHY_SYM32, id), \
+	SRI(DP_DPHY_SYM32_SAT_VC0, DP_DPHY_SYM32, id), \
+	SRI(DP_DPHY_SYM32_SAT_VC1, DP_DPHY_SYM32, id), \
+	SRI(DP_DPHY_SYM32_SAT_VC2, DP_DPHY_SYM32, id), \
+	SRI(DP_DPHY_SYM32_SAT_VC3, DP_DPHY_SYM32, id), \
+	SRI(DP_DPHY_SYM32_VC_RATE_CNTL0, DP_DPHY_SYM32, id), \
+	SRI(DP_DPHY_SYM32_VC_RATE_CNTL1, DP_DPHY_SYM32, id), \
+	SRI(DP_DPHY_SYM32_VC_RATE_CNTL2, DP_DPHY_SYM32, id), \
+	SRI(DP_DPHY_SYM32_VC_RATE_CNTL3, DP_DPHY_SYM32, id), \
+	SRI(DP_DPHY_SYM32_SAT_UPDATE, DP_DPHY_SYM32, id)
+
+#define DCN3_1_RDPCSTX_REG_LIST(id) \
+	SRII(RDPCSTX_PHY_CNTL6, RDPCSTX, id)
+
+
+#define DCN3_1_HPO_DP_LINK_ENC_REGS \
+	uint32_t DP_LINK_ENC_CLOCK_CONTROL;\
+	uint32_t DP_DPHY_SYM32_CONTROL;\
+	uint32_t DP_DPHY_SYM32_STATUS;\
+	uint32_t DP_DPHY_SYM32_TP_CONFIG;\
+	uint32_t DP_DPHY_SYM32_TP_PRBS_SEED0;\
+	uint32_t DP_DPHY_SYM32_TP_PRBS_SEED1;\
+	uint32_t DP_DPHY_SYM32_TP_PRBS_SEED2;\
+	uint32_t DP_DPHY_SYM32_TP_PRBS_SEED3;\
+	uint32_t DP_DPHY_SYM32_TP_SQ_PULSE;\
+	uint32_t DP_DPHY_SYM32_TP_CUSTOM0;\
+	uint32_t DP_DPHY_SYM32_TP_CUSTOM1;\
+	uint32_t DP_DPHY_SYM32_TP_CUSTOM2;\
+	uint32_t DP_DPHY_SYM32_TP_CUSTOM3;\
+	uint32_t DP_DPHY_SYM32_TP_CUSTOM4;\
+	uint32_t DP_DPHY_SYM32_TP_CUSTOM5;\
+	uint32_t DP_DPHY_SYM32_TP_CUSTOM6;\
+	uint32_t DP_DPHY_SYM32_TP_CUSTOM7;\
+	uint32_t DP_DPHY_SYM32_TP_CUSTOM8;\
+	uint32_t DP_DPHY_SYM32_TP_CUSTOM9;\
+	uint32_t DP_DPHY_SYM32_TP_CUSTOM10;\
+	uint32_t DP_DPHY_SYM32_SAT_VC0;\
+	uint32_t DP_DPHY_SYM32_SAT_VC1;\
+	uint32_t DP_DPHY_SYM32_SAT_VC2;\
+	uint32_t DP_DPHY_SYM32_SAT_VC3;\
+	uint32_t DP_DPHY_SYM32_VC_RATE_CNTL0;\
+	uint32_t DP_DPHY_SYM32_VC_RATE_CNTL1;\
+	uint32_t DP_DPHY_SYM32_VC_RATE_CNTL2;\
+	uint32_t DP_DPHY_SYM32_VC_RATE_CNTL3;\
+	uint32_t DP_DPHY_SYM32_SAT_UPDATE
+
+struct dcn31_hpo_dp_link_encoder_registers {
+	DCN3_1_HPO_DP_LINK_ENC_REGS;
+	uint32_t RDPCSTX_PHY_CNTL6[5];
+};
+
+#define DCN3_1_HPO_DP_LINK_ENC_MASK_SH_LIST(mask_sh)\
+	SE_SF(DP_LINK_ENC0_DP_LINK_ENC_CLOCK_CONTROL, DP_LINK_ENC_CLOCK_EN, mask_sh),\
+	SE_SF(DP_DPHY_SYM320_DP_DPHY_SYM32_CONTROL, DPHY_RESET, mask_sh),\
+	SE_SF(DP_DPHY_SYM320_DP_DPHY_SYM32_CONTROL, DPHY_ENABLE, mask_sh),\
+	SE_SF(DP_DPHY_SYM320_DP_DPHY_SYM32_CONTROL, PRECODER_ENABLE, mask_sh),\
+	SE_SF(DP_DPHY_SYM320_DP_DPHY_SYM32_CONTROL, MODE, mask_sh),\
+	SE_SF(DP_DPHY_SYM320_DP_DPHY_SYM32_CONTROL, NUM_LANES, mask_sh),\
+	SE_SF(DP_DPHY_SYM320_DP_DPHY_SYM32_STATUS, STATUS, mask_sh),\
+	SE_SF(DP_DPHY_SYM320_DP_DPHY_SYM32_STATUS, SAT_UPDATE_PENDING, mask_sh),\
+	SE_SF(DP_DPHY_SYM320_DP_DPHY_SYM32_STATUS, RATE_UPDATE_PENDING, mask_sh),\
+	SE_SF(DP_DPHY_SYM320_DP_DPHY_SYM32_TP_CUSTOM0, TP_CUSTOM, mask_sh),\
+	SE_SF(DP_DPHY_SYM320_DP_DPHY_SYM32_TP_CONFIG, TP_SELECT0, mask_sh),\
+	SE_SF(DP_DPHY_SYM320_DP_DPHY_SYM32_TP_CONFIG, TP_SELECT1, mask_sh),\
+	SE_SF(DP_DPHY_SYM320_DP_DPHY_SYM32_TP_CONFIG, TP_SELECT2, mask_sh),\
+	SE_SF(DP_DPHY_SYM320_DP_DPHY_SYM32_TP_CONFIG, TP_SELECT3, mask_sh),\
+	SE_SF(DP_DPHY_SYM320_DP_DPHY_SYM32_TP_CONFIG, TP_PRBS_SEL0, mask_sh),\
+	SE_SF(DP_DPHY_SYM320_DP_DPHY_SYM32_TP_CONFIG, TP_PRBS_SEL1, mask_sh),\
+	SE_SF(DP_DPHY_SYM320_DP_DPHY_SYM32_TP_CONFIG, TP_PRBS_SEL2, mask_sh),\
+	SE_SF(DP_DPHY_SYM320_DP_DPHY_SYM32_TP_CONFIG, TP_PRBS_SEL3, mask_sh),\
+	SE_SF(DP_DPHY_SYM320_DP_DPHY_SYM32_TP_SQ_PULSE, TP_SQ_PULSE_WIDTH, mask_sh),\
+	SE_SF(DP_DPHY_SYM320_DP_DPHY_SYM32_SAT_VC0, SAT_STREAM_SOURCE, mask_sh),\
+	SE_SF(DP_DPHY_SYM320_DP_DPHY_SYM32_SAT_VC0, SAT_SLOT_COUNT, mask_sh),\
+	SE_SF(RDPCSTX0_RDPCSTX_PHY_CNTL6, RDPCS_PHY_DPALT_DISABLE, mask_sh),\
+	SE_SF(DP_DPHY_SYM320_DP_DPHY_SYM32_VC_RATE_CNTL0, STREAM_VC_RATE_X, mask_sh),\
+	SE_SF(DP_DPHY_SYM320_DP_DPHY_SYM32_VC_RATE_CNTL0, STREAM_VC_RATE_Y, mask_sh),\
+	SE_SF(DP_DPHY_SYM320_DP_DPHY_SYM32_SAT_UPDATE, SAT_UPDATE, mask_sh)
+
+#define DCN3_1_HPO_DP_LINK_ENC_REG_FIELD_LIST(type) \
+	type DP_LINK_ENC_CLOCK_EN;\
+	type DPHY_RESET;\
+	type DPHY_ENABLE;\
+	type PRECODER_ENABLE;\
+	type NUM_LANES;\
+	type MODE;\
+	type STATUS;\
+	type SAT_UPDATE_PENDING;\
+	type RATE_UPDATE_PENDING;\
+	type TP_CUSTOM;\
+	type TP_SELECT0;\
+	type TP_SELECT1;\
+	type TP_SELECT2;\
+	type TP_SELECT3;\
+	type TP_PRBS_SEL0;\
+	type TP_PRBS_SEL1;\
+	type TP_PRBS_SEL2;\
+	type TP_PRBS_SEL3;\
+	type TP_SQ_PULSE_WIDTH;\
+	type SAT_STREAM_SOURCE;\
+	type SAT_SLOT_COUNT;\
+	type STREAM_VC_RATE_X;\
+	type STREAM_VC_RATE_Y;\
+	type SAT_UPDATE;\
+	type RDPCS_PHY_DPALT_DISABLE
+
+
+struct dcn31_hpo_dp_link_encoder_shift {
+	DCN3_1_HPO_DP_LINK_ENC_REG_FIELD_LIST(uint8_t);
+};
+
+struct dcn31_hpo_dp_link_encoder_mask {
+	DCN3_1_HPO_DP_LINK_ENC_REG_FIELD_LIST(uint32_t);
+};
+
+struct dcn31_hpo_dp_link_encoder {
+	struct hpo_dp_link_encoder base;
+	const struct dcn31_hpo_dp_link_encoder_registers *regs;
+	const struct dcn31_hpo_dp_link_encoder_shift *hpo_le_shift;
+	const struct dcn31_hpo_dp_link_encoder_mask *hpo_le_mask;
+};
+
+void hpo_dp_link_encoder31_construct(struct dcn31_hpo_dp_link_encoder *enc31,
+	struct dc_context *ctx,
+	uint32_t inst,
+	const struct dcn31_hpo_dp_link_encoder_registers *hpo_le_regs,
+	const struct dcn31_hpo_dp_link_encoder_shift *hpo_le_shift,
+	const struct dcn31_hpo_dp_link_encoder_mask *hpo_le_mask);
+
+void dcn31_hpo_dp_link_enc_enable_dp_output(
+	struct hpo_dp_link_encoder *enc,
+	const struct dc_link_settings *link_settings,
+	enum transmitter transmitter);
+
+void dcn31_hpo_dp_link_enc_disable_output(
+	struct hpo_dp_link_encoder *enc,
+	enum signal_type signal);
+
+void dcn31_hpo_dp_link_enc_enable(
+	struct hpo_dp_link_encoder *enc,
+	enum dc_lane_count num_lanes);
+
+void dcn31_hpo_dp_link_enc_disable(
+	struct hpo_dp_link_encoder *enc);
+
+void dcn31_hpo_dp_link_enc_set_link_test_pattern(
+	struct hpo_dp_link_encoder *enc,
+	struct encoder_set_dp_phy_pattern_param *tp_params);
+
+void dcn31_hpo_dp_link_enc_update_stream_allocation_table(
+	struct hpo_dp_link_encoder *enc,
+	const struct link_mst_stream_allocation_table *table);
+
+void dcn31_hpo_dp_link_enc_set_throttled_vcp_size(
+	struct hpo_dp_link_encoder *enc,
+	uint32_t stream_encoder_inst,
+	struct fixed31_32 avg_time_slots_per_mtp);
+
+void dcn31_hpo_dp_link_enc_read_state(
+	struct hpo_dp_link_encoder *enc,
+	struct hpo_dp_link_enc_state *state);
+
+void dcn31_hpo_dp_link_enc_set_ffe(
+	struct hpo_dp_link_encoder *enc,
+	const struct dc_link_settings *link_settings,
+	uint8_t ffe_preset);
+
+#endif   // __DAL_DCN31_HPO_LINK_ENCODER_H__

drivers/gpu/drm/amd/display/dc/dcn31/dcn31_resource.c

@@ -53,6 +53,7 @@
 #include "dcn30/dcn30_afmt.h"
 #include "dcn30/dcn30_dio_stream_encoder.h"
 #include "dcn31/dcn31_hpo_dp_stream_encoder.h"
+#include "dcn31/dcn31_hpo_dp_link_encoder.h"
 #include "dcn31/dcn31_apg.h"
 #include "dcn31/dcn31_dio_link_encoder.h"
 #include "dce/dce_clock_source.h"
@@ -585,6 +586,29 @@ static const struct dcn31_hpo_dp_stream_encoder_mask hpo_dp_se_mask = {
 	DCN3_1_HPO_DP_STREAM_ENC_MASK_SH_LIST(_MASK)
 };
 
+#define hpo_dp_link_encoder_reg_list(id)\
+[id] = {\
+	DCN3_1_HPO_DP_LINK_ENC_REG_LIST(id),\
+	DCN3_1_RDPCSTX_REG_LIST(0),\
+	DCN3_1_RDPCSTX_REG_LIST(1),\
+	DCN3_1_RDPCSTX_REG_LIST(2),\
+	DCN3_1_RDPCSTX_REG_LIST(3),\
+	DCN3_1_RDPCSTX_REG_LIST(4)\
+}
+
+static const struct dcn31_hpo_dp_link_encoder_registers hpo_dp_link_enc_regs[] = {
+	hpo_dp_link_encoder_reg_list(0),
+	hpo_dp_link_encoder_reg_list(1),
+};
+
+static const struct dcn31_hpo_dp_link_encoder_shift hpo_dp_le_shift = {
+	DCN3_1_HPO_DP_LINK_ENC_MASK_SH_LIST(__SHIFT)
+};
+
+static const struct dcn31_hpo_dp_link_encoder_mask hpo_dp_le_mask = {
+	DCN3_1_HPO_DP_LINK_ENC_MASK_SH_LIST(_MASK)
+};
+
 static const struct dcn3_dpp_registers dpp_regs[] = {
 	dpp_regs(0),
 	dpp_regs(1),
@@ -922,6 +946,7 @@ static const struct resource_caps res_cap_dcn31 = {
 	.num_stream_encoder = 5,
 	.num_dig_link_enc = 5,
 	.num_hpo_dp_stream_encoder = 4,
+	.num_hpo_dp_link_encoder = 2,
 	.num_pll = 5,
 	.num_dwb = 1,
 	.num_ddc = 5,
@@ -1398,6 +1423,22 @@ static struct hpo_dp_stream_encoder *dcn31_hpo_dp_stream_encoder_create(
 	return &hpo_dp_enc31->base;
 }
 
+static struct hpo_dp_link_encoder *dcn31_hpo_dp_link_encoder_create(
+	uint8_t inst,
+	struct dc_context *ctx)
+{
+	struct dcn31_hpo_dp_link_encoder *hpo_dp_enc31;
+
+	/* allocate HPO link encoder */
+	hpo_dp_enc31 = kzalloc(sizeof(struct dcn31_hpo_dp_link_encoder), GFP_KERNEL);
+
+	hpo_dp_link_encoder31_construct(hpo_dp_enc31, ctx, inst,
+					&hpo_dp_link_enc_regs[inst],
+					&hpo_dp_le_shift, &hpo_dp_le_mask);
+
+	return &hpo_dp_enc31->base;
+}
+
 static struct dce_hwseq *dcn31_hwseq_create(
 	struct dc_context *ctx)
 {
@@ -1416,6 +1457,7 @@ static const struct resource_create_funcs res_create_funcs = {
 	.create_audio = dcn31_create_audio,
 	.create_stream_encoder = dcn31_stream_encoder_create,
 	.create_hpo_dp_stream_encoder = dcn31_hpo_dp_stream_encoder_create,
+	.create_hpo_dp_link_encoder = dcn31_hpo_dp_link_encoder_create,
 	.create_hwseq = dcn31_hwseq_create,
 };
 
@@ -1424,6 +1466,7 @@ static const struct resource_create_funcs res_create_maximus_funcs = {
 	.create_audio = NULL,
 	.create_stream_encoder = NULL,
 	.create_hpo_dp_stream_encoder = dcn31_hpo_dp_stream_encoder_create,
+	.create_hpo_dp_link_encoder = dcn31_hpo_dp_link_encoder_create,
 	.create_hwseq = dcn31_hwseq_create,
 };
 
@@ -1461,6 +1504,13 @@ static void dcn31_resource_destruct(struct dcn31_resource_pool *pool)
 		}
 	}
 
+	for (i = 0; i < pool->base.hpo_dp_link_enc_count; i++) {
+		if (pool->base.hpo_dp_link_enc[i] != NULL) {
+			kfree(DCN3_1_HPO_DP_LINK_ENC_FROM_HPO_LINK_ENC(pool->base.hpo_dp_link_enc[i]));
+			pool->base.hpo_dp_link_enc[i] = NULL;
+		}
+	}
+
 	for (i = 0; i < pool->base.res_cap->num_dsc; i++) {
 		if (pool->base.dscs[i] != NULL)
 			dcn20_dsc_destroy(&pool->base.dscs[i]);

drivers/gpu/drm/amd/display/dc/inc/core_types.h

@@ -249,6 +249,8 @@ struct resource_pool {
 #if defined(CONFIG_DRM_AMD_DC_DCN)
 	unsigned int hpo_dp_stream_enc_count;
 	struct hpo_dp_stream_encoder *hpo_dp_stream_enc[MAX_HPO_DP2_ENCODERS];
+	unsigned int hpo_dp_link_enc_count;
+	struct hpo_dp_link_encoder *hpo_dp_link_enc[MAX_HPO_DP2_LINK_ENCODERS];
 #endif
 #if defined(CONFIG_DRM_AMD_DC_DCN)
 	struct dc_3dlut *mpc_lut[MAX_PIPES];

drivers/gpu/drm/amd/display/dc/inc/hw/hw_shared.h

@@ -40,6 +40,7 @@
 #define MAX_DWB_PIPES	1
 #if defined(CONFIG_DRM_AMD_DC_DCN)
 #define MAX_HPO_DP2_ENCODERS	4
+#define MAX_HPO_DP2_LINK_ENCODERS	2
 #endif
 
 struct gamma_curve {

drivers/gpu/drm/amd/display/dc/inc/hw/link_encoder.h

@@ -210,4 +210,91 @@ struct link_enc_assignment {
 	enum engine_id eng_id;
 };
 
+#if defined(CONFIG_DRM_AMD_DC_DCN)
+enum dp2_link_mode {
+	DP2_LINK_TRAINING_TPS1,
+	DP2_LINK_TRAINING_TPS2,
+	DP2_LINK_ACTIVE,
+	DP2_TEST_PATTERN
+};
+
+enum dp2_phy_tp_select {
+	DP_DPHY_TP_SELECT_TPS1,
+	DP_DPHY_TP_SELECT_TPS2,
+	DP_DPHY_TP_SELECT_PRBS,
+	DP_DPHY_TP_SELECT_CUSTOM,
+	DP_DPHY_TP_SELECT_SQUARE
+};
+
+enum dp2_phy_tp_prbs {
+	DP_DPHY_TP_PRBS7,
+	DP_DPHY_TP_PRBS9,
+	DP_DPHY_TP_PRBS11,
+	DP_DPHY_TP_PRBS15,
+	DP_DPHY_TP_PRBS23,
+	DP_DPHY_TP_PRBS31
+};
+
+struct hpo_dp_link_enc_state {
+	uint32_t   link_enc_enabled;
+	uint32_t   link_mode;
+	uint32_t   lane_count;
+	uint32_t   slot_count[4];
+	uint32_t   stream_src[4];
+	uint32_t   vc_rate_x[4];
+	uint32_t   vc_rate_y[4];
+};
+
+struct hpo_dp_link_encoder {
+	const struct hpo_dp_link_encoder_funcs *funcs;
+	struct dc_context *ctx;
+	int inst;
+	enum engine_id preferred_engine;
+	enum transmitter transmitter;
+	enum hpd_source_id hpd_source;
+};
+
+struct hpo_dp_link_encoder_funcs {
+
+	void (*enable_link_phy)(struct hpo_dp_link_encoder *enc,
+		const struct dc_link_settings *link_settings,
+		enum transmitter transmitter);
+
+	void (*disable_link_phy)(struct hpo_dp_link_encoder *link_enc,
+		enum signal_type signal);
+
+	void (*link_enable)(
+			struct hpo_dp_link_encoder *enc,
+			enum dc_lane_count num_lanes);
+
+	void (*link_disable)(
+			struct hpo_dp_link_encoder *enc);
+
+	void (*set_link_test_pattern)(
+			struct hpo_dp_link_encoder *enc,
+			struct encoder_set_dp_phy_pattern_param *tp_params);
+
+	void (*update_stream_allocation_table)(
+			struct hpo_dp_link_encoder *enc,
+			const struct link_mst_stream_allocation_table *table);
+
+	void (*set_throttled_vcp_size)(
+			struct hpo_dp_link_encoder *enc,
+			uint32_t stream_encoder_inst,
+			struct fixed31_32 avg_time_slots_per_mtp);
+
+	bool (*is_in_alt_mode) (
+			struct hpo_dp_link_encoder *enc);
+
+	void (*read_state)(
+			struct hpo_dp_link_encoder *enc,
+			struct hpo_dp_link_enc_state *state);
+
+	void (*set_ffe)(
+		struct hpo_dp_link_encoder *enc,
+		const struct dc_link_settings *link_settings,
+		uint8_t ffe_preset);
+};
+#endif
+
 #endif /* LINK_ENCODER_H_ */

drivers/gpu/drm/amd/display/dc/inc/resource.h

@@ -51,6 +51,7 @@ struct resource_caps {
 	unsigned int num_dig_link_enc; // Total number of DIGs (digital encoders) in DIO (Display Input/Output).
 #if defined(CONFIG_DRM_AMD_DC_DCN)
 	int num_hpo_dp_stream_encoder;
+	int num_hpo_dp_link_encoder;
 #endif
 	int num_mpc_3dlut;
 };
@@ -74,6 +75,10 @@ struct resource_create_funcs {
 #if defined(CONFIG_DRM_AMD_DC_DCN)
 	struct hpo_dp_stream_encoder *(*create_hpo_dp_stream_encoder)(
 			enum engine_id eng_id, struct dc_context *ctx);
+
+	struct hpo_dp_link_encoder *(*create_hpo_dp_link_encoder)(
+			uint8_t inst,
+			struct dc_context *ctx);
 #endif
 
 	struct dce_hwseq *(*create_hwseq)(

drivers/gpu/drm/amd/display/include/link_service_types.h

@@ -114,13 +114,30 @@ enum dp_test_pattern {
 	DP_TEST_PATTERN_CP2520_2,
 	DP_TEST_PATTERN_HBR2_COMPLIANCE_EYE = DP_TEST_PATTERN_CP2520_2,
 	DP_TEST_PATTERN_CP2520_3,
+#if defined(CONFIG_DRM_AMD_DC_DCN)
+	DP_TEST_PATTERN_128b_132b_TPS1,
+	DP_TEST_PATTERN_128b_132b_TPS2,
+	DP_TEST_PATTERN_PRBS9,
+	DP_TEST_PATTERN_PRBS11,
+	DP_TEST_PATTERN_PRBS15,
+	DP_TEST_PATTERN_PRBS23,
+	DP_TEST_PATTERN_PRBS31,
+	DP_TEST_PATTERN_264BIT_CUSTOM,
+	DP_TEST_PATTERN_SQUARE_PULSE,
+#endif
 
 	/* Link Training Patterns */
 	DP_TEST_PATTERN_TRAINING_PATTERN1,
 	DP_TEST_PATTERN_TRAINING_PATTERN2,
 	DP_TEST_PATTERN_TRAINING_PATTERN3,
 	DP_TEST_PATTERN_TRAINING_PATTERN4,
+#if defined(CONFIG_DRM_AMD_DC_DCN)
+	DP_TEST_PATTERN_128b_132b_TPS1_TRAINING_MODE,
+	DP_TEST_PATTERN_128b_132b_TPS2_TRAINING_MODE,
+	DP_TEST_PATTERN_PHY_PATTERN_END = DP_TEST_PATTERN_128b_132b_TPS2_TRAINING_MODE,
+#else
 	DP_TEST_PATTERN_PHY_PATTERN_END = DP_TEST_PATTERN_TRAINING_PATTERN4,
+#endif
 
 	/* link test patterns*/
 	DP_TEST_PATTERN_COLOR_SQUARES,