[PATCH 6/7] drm/amdgpu/display/mst: adjust the naming of mst_port and port of aconnector

[Harry Wentland <harry.wentland@amd.com>]

From: Wayne Lin <Wayne.Lin@amd.com>

[why & how]
The term (i.e. port & mst_port) that we used to use in amdgpu is a bit
confusing. Rename them to mst_output_port & mst_root respectively.

Signed-off-by: Wayne Lin <Wayne.Lin@amd.com>
Signed-off-by: Harry Wentland <harry.wentland@amd.com>
Acked-by: Harry Wentland <harry.wentland@amd.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_mode.h      |  4 +-
 .../gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 24 +++++-----
 .../gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h |  4 +-
 .../drm/amd/display/amdgpu_dm/amdgpu_dm_crc.c |  2 +-
 .../amd/display/amdgpu_dm/amdgpu_dm_debugfs.c | 16 +++----
 .../amd/display/amdgpu_dm/amdgpu_dm_helpers.c | 19 ++++----
 .../display/amdgpu_dm/amdgpu_dm_mst_types.c   | 48 +++++++++----------
 7 files changed, 59 insertions(+), 58 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_mode.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_mode.h
index bf009de59710..c1ece3d2ea36 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_mode.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_mode.h
@@ -551,8 +551,8 @@ struct amdgpu_mst_connector {
 
 	struct drm_dp_mst_topology_mgr mst_mgr;
 	struct amdgpu_dm_dp_aux dm_dp_aux;
-	struct drm_dp_mst_port *port;
-	struct amdgpu_connector *mst_port;
+	struct drm_dp_mst_port *mst_output_port;
+	struct amdgpu_connector *mst_root;
 	bool is_mst_connector;
 	struct amdgpu_encoder *mst_encoder;
 };
diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
index 4c5b8793b8af..291dea18c658 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -2197,7 +2197,7 @@ static void s3_handle_mst(struct drm_device *dev, bool suspend)
 	drm_for_each_connector_iter(connector, &iter) {
 		aconnector = to_amdgpu_dm_connector(connector);
 		if (aconnector->dc_link->type != dc_connection_mst_branch ||
-		    aconnector->mst_port)
+		    aconnector->mst_root)
 			continue;
 
 		mgr = &aconnector->mst_mgr;
@@ -6582,11 +6582,11 @@ static int dm_encoder_helper_atomic_check(struct drm_encoder *encoder,
 	int clock, bpp = 0;
 	bool is_y420 = false;
 
-	if (!aconnector->port || !aconnector->dc_sink)
+	if (!aconnector->mst_output_port || !aconnector->dc_sink)
 		return 0;
 
-	mst_port = aconnector->port;
-	mst_mgr = &aconnector->mst_port->mst_mgr;
+	mst_port = aconnector->mst_output_port;
+	mst_mgr = &aconnector->mst_root->mst_mgr;
 
 	if (!crtc_state->connectors_changed && !crtc_state->mode_changed)
 		return 0;
@@ -6596,7 +6596,7 @@ static int dm_encoder_helper_atomic_check(struct drm_encoder *encoder,
 		return PTR_ERR(mst_state);
 
 	if (!mst_state->pbn_div)
-		mst_state->pbn_div = dm_mst_get_pbn_divider(aconnector->mst_port->dc_link);
+		mst_state->pbn_div = dm_mst_get_pbn_divider(aconnector->mst_root->dc_link);
 
 	if (!state->duplicated) {
 		int max_bpc = conn_state->max_requested_bpc;
@@ -6642,7 +6642,7 @@ static int dm_update_mst_vcpi_slots_for_dsc(struct drm_atomic_state *state,
 
 		aconnector = to_amdgpu_dm_connector(connector);
 
-		if (!aconnector->port)
+		if (!aconnector->mst_output_port)
 			continue;
 
 		if (!new_con_state || !new_con_state->crtc)
@@ -6682,7 +6682,7 @@ static int dm_update_mst_vcpi_slots_for_dsc(struct drm_atomic_state *state,
 			dm_conn_state->pbn = pbn;
 			dm_conn_state->vcpi_slots = slot_num;
 
-			ret = drm_dp_mst_atomic_enable_dsc(state, aconnector->port,
+			ret = drm_dp_mst_atomic_enable_dsc(state, aconnector->mst_output_port,
 							   dm_conn_state->pbn, false);
 			if (ret < 0)
 				return ret;
@@ -6690,7 +6690,7 @@ static int dm_update_mst_vcpi_slots_for_dsc(struct drm_atomic_state *state,
 			continue;
 		}
 
-		vcpi = drm_dp_mst_atomic_enable_dsc(state, aconnector->port, pbn, true);
+		vcpi = drm_dp_mst_atomic_enable_dsc(state, aconnector->mst_output_port, pbn, true);
 		if (vcpi < 0)
 			return vcpi;
 
@@ -7104,7 +7104,7 @@ void amdgpu_dm_connector_init_helper(struct amdgpu_display_manager *dm,
 				adev->mode_info.underscan_vborder_property,
 				0);
 
-	if (!aconnector->mst_port)
+	if (!aconnector->mst_root)
 		drm_connector_attach_max_bpc_property(&aconnector->base, 8, 16);
 
 	/* This defaults to the max in the range, but we want 8bpc for non-edp. */
@@ -7122,7 +7122,7 @@ void amdgpu_dm_connector_init_helper(struct amdgpu_display_manager *dm,
 	    connector_type == DRM_MODE_CONNECTOR_eDP) {
 		drm_connector_attach_hdr_output_metadata_property(&aconnector->base);
 
-		if (!aconnector->mst_port)
+		if (!aconnector->mst_root)
 			drm_connector_attach_vrr_capable_property(&aconnector->base);
 
 #ifdef CONFIG_DRM_AMD_DC_HDCP
@@ -9595,7 +9595,7 @@ static int add_affected_mst_dsc_crtcs(struct drm_atomic_state *state, struct drm
 			continue;
 
 		aconnector = to_amdgpu_dm_connector(connector);
-		if (!aconnector->port || !aconnector->mst_port)
+		if (!aconnector->mst_output_port || !aconnector->mst_root)
 			aconnector = NULL;
 		else
 			break;
@@ -9604,7 +9604,7 @@ static int add_affected_mst_dsc_crtcs(struct drm_atomic_state *state, struct drm
 	if (!aconnector)
 		return 0;
 
-	return drm_dp_mst_add_affected_dsc_crtcs(state, &aconnector->mst_port->mst_mgr);
+	return drm_dp_mst_add_affected_dsc_crtcs(state, &aconnector->mst_root->mst_mgr);
 }
 #endif
 
diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h
index abbbb3813c1e..b440e2e0cfe0 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h
@@ -604,8 +604,8 @@ struct amdgpu_dm_connector {
 	/* DM only */
 	struct drm_dp_mst_topology_mgr mst_mgr;
 	struct amdgpu_dm_dp_aux dm_dp_aux;
-	struct drm_dp_mst_port *port;
-	struct amdgpu_dm_connector *mst_port;
+	struct drm_dp_mst_port *mst_output_port;
+	struct amdgpu_dm_connector *mst_root;
 	struct drm_dp_aux *dsc_aux;
 	/* TODO see if we can merge with ddc_bus or make a dm_connector */
 	struct amdgpu_i2c_adapter *i2c;
diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_crc.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_crc.c
index 8873ecada27c..27711743c22c 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_crc.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_crc.c
@@ -344,7 +344,7 @@ int amdgpu_dm_crtc_set_crc_source(struct drm_crtc *crtc, const char *src_name)
 			goto cleanup;
 		}
 
-		aux = (aconn->port) ? &aconn->port->aux : &aconn->dm_dp_aux.aux;
+		aux = (aconn->mst_output_port) ? &aconn->mst_output_port->aux : &aconn->dm_dp_aux.aux;
 
 		if (!aux) {
 			DRM_DEBUG_DRIVER("No dp aux for amd connector\n");
diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_debugfs.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_debugfs.c
index 704860e6ba84..40a95fc0e4f8 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_debugfs.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_debugfs.c
@@ -1193,7 +1193,7 @@ static int dp_dsc_fec_support_show(struct seq_file *m, void *data)
 			break;
 		}
 		dpcd_caps = aconnector->dc_link->dpcd_caps;
-		if (aconnector->port) {
+		if (aconnector->mst_output_port) {
 			/* aconnector sets dsc_aux during get_modes call
 			 * if MST connector has it means it can either
 			 * enable DSC on the sink device or on MST branch
@@ -1280,7 +1280,7 @@ static ssize_t trigger_hotplug(struct file *f, const char __user *buf,
 	mutex_lock(&aconnector->hpd_lock);
 
 	/* Don't support for mst end device*/
-	if (aconnector->mst_port) {
+	if (aconnector->mst_root) {
 		mutex_unlock(&aconnector->hpd_lock);
 		return -EINVAL;
 	}
@@ -2539,13 +2539,13 @@ static int dp_is_mst_connector_show(struct seq_file *m, void *unused)
 
 	if (aconnector->mst_mgr.mst_state) {
 		role = "root";
-	} else if (aconnector->mst_port &&
-		aconnector->mst_port->mst_mgr.mst_state) {
+	} else if (aconnector->mst_root &&
+		aconnector->mst_root->mst_mgr.mst_state) {
 
 		role = "end";
 
-		mgr = &aconnector->mst_port->mst_mgr;
-		port = aconnector->port;
+		mgr = &aconnector->mst_root->mst_mgr;
+		port = aconnector->mst_output_port;
 
 		drm_modeset_lock(&mgr->base.lock, NULL);
 		if (port->pdt == DP_PEER_DEVICE_MST_BRANCHING &&
@@ -3392,12 +3392,12 @@ static int trigger_hpd_mst_set(void *data, u64 val)
 			if (!aconnector->dc_link)
 				continue;
 
-			if (!aconnector->mst_port)
+			if (!aconnector->mst_root)
 				continue;
 
 			link = aconnector->dc_link;
 			dc_link_dp_receiver_power_ctrl(link, false);
-			drm_dp_mst_topology_mgr_set_mst(&aconnector->mst_port->mst_mgr, false);
+			drm_dp_mst_topology_mgr_set_mst(&aconnector->mst_root->mst_mgr, false);
 			link->mst_stream_alloc_table.stream_count = 0;
 			memset(link->mst_stream_alloc_table.stream_allocations, 0,
 					sizeof(link->mst_stream_alloc_table.stream_allocations));
diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c
index 5cff56bb8f56..7aff7eb13ea2 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c
@@ -195,14 +195,14 @@ bool dm_helpers_dp_mst_write_payload_allocation_table(
 	 * that blocks before commit guaranteeing that the state
 	 * is not gonna be swapped while still in use in commit tail */
 
-	if (!aconnector || !aconnector->mst_port)
+	if (!aconnector || !aconnector->mst_root)
 		return false;
 
-	mst_mgr = &aconnector->mst_port->mst_mgr;
+	mst_mgr = &aconnector->mst_root->mst_mgr;
 	mst_state = to_drm_dp_mst_topology_state(mst_mgr->base.state);
 
 	/* It's OK for this to fail */
-	payload = drm_atomic_get_mst_payload_state(mst_state, aconnector->port);
+	payload = drm_atomic_get_mst_payload_state(mst_state, aconnector->mst_output_port);
 	if (enable)
 		drm_dp_add_payload_part1(mst_mgr, mst_state, payload);
 	else
@@ -247,10 +247,10 @@ enum act_return_status dm_helpers_dp_mst_poll_for_allocation_change_trigger(
 
 	aconnector = (struct amdgpu_dm_connector *)stream->dm_stream_context;
 
-	if (!aconnector || !aconnector->mst_port)
+	if (!aconnector || !aconnector->mst_root)
 		return ACT_FAILED;
 
-	mst_mgr = &aconnector->mst_port->mst_mgr;
+	mst_mgr = &aconnector->mst_root->mst_mgr;
 
 	if (!mst_mgr->mst_state)
 		return ACT_FAILED;
@@ -277,13 +277,14 @@ bool dm_helpers_dp_mst_send_payload_allocation(
 
 	aconnector = (struct amdgpu_dm_connector *)stream->dm_stream_context;
 
-	if (!aconnector || !aconnector->mst_port)
+	if (!aconnector || !aconnector->mst_root)
 		return false;
 
-	mst_mgr = &aconnector->mst_port->mst_mgr;
+	mst_mgr = &aconnector->mst_root->mst_mgr;
 	mst_state = to_drm_dp_mst_topology_state(mst_mgr->base.state);
 
-	payload = drm_atomic_get_mst_payload_state(mst_state, aconnector->port);
+	payload = drm_atomic_get_mst_payload_state(mst_state, aconnector->mst_output_port);
+
 	if (!enable) {
 		set_flag = MST_CLEAR_ALLOCATED_PAYLOAD;
 		clr_flag = MST_ALLOCATE_NEW_PAYLOAD;
@@ -710,7 +711,7 @@ bool dm_helpers_dp_write_dsc_enable(
 				aconnector->dsc_aux, stream, enable_dsc);
 #endif
 
-		port = aconnector->port;
+		port = aconnector->mst_output_port;
 
 		if (enable) {
 			if (port->passthrough_aux) {
diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c
index e8d14ab0953a..bc94df02cb0b 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c
@@ -134,7 +134,7 @@ dm_dp_mst_connector_destroy(struct drm_connector *connector)
 	kfree(aconnector->edid);
 
 	drm_connector_cleanup(connector);
-	drm_dp_mst_put_port_malloc(aconnector->port);
+	drm_dp_mst_put_port_malloc(aconnector->mst_output_port);
 	kfree(aconnector);
 }
 
@@ -146,7 +146,7 @@ amdgpu_dm_mst_connector_late_register(struct drm_connector *connector)
 	int r;
 
 	r = drm_dp_mst_connector_late_register(connector,
-					       amdgpu_dm_connector->port);
+					       amdgpu_dm_connector->mst_output_port);
 	if (r < 0)
 		return r;
 
@@ -162,8 +162,8 @@ amdgpu_dm_mst_connector_early_unregister(struct drm_connector *connector)
 {
 	struct amdgpu_dm_connector *aconnector =
 		to_amdgpu_dm_connector(connector);
-	struct drm_dp_mst_port *port = aconnector->port;
-	struct amdgpu_dm_connector *root = aconnector->mst_port;
+	struct drm_dp_mst_port *port = aconnector->mst_output_port;
+	struct amdgpu_dm_connector *root = aconnector->mst_root;
 	struct dc_link *dc_link = aconnector->dc_link;
 	struct dc_sink *dc_sink = aconnector->dc_sink;
 
@@ -213,7 +213,7 @@ bool needs_dsc_aux_workaround(struct dc_link *link)
 static bool validate_dsc_caps_on_connector(struct amdgpu_dm_connector *aconnector)
 {
 	struct dc_sink *dc_sink = aconnector->dc_sink;
-	struct drm_dp_mst_port *port = aconnector->port;
+	struct drm_dp_mst_port *port = aconnector->mst_output_port;
 	u8 dsc_caps[16] = { 0 };
 	u8 dsc_branch_dec_caps_raw[3] = { 0 };	// DSC branch decoder caps 0xA0 ~ 0xA2
 	u8 *dsc_branch_dec_caps = NULL;
@@ -231,7 +231,7 @@ static bool validate_dsc_caps_on_connector(struct amdgpu_dm_connector *aconnecto
 	 */
 	if (!aconnector->dsc_aux && !port->parent->port_parent &&
 	    needs_dsc_aux_workaround(aconnector->dc_link))
-		aconnector->dsc_aux = &aconnector->mst_port->dm_dp_aux.aux;
+		aconnector->dsc_aux = &aconnector->mst_root->dm_dp_aux.aux;
 
 	if (!aconnector->dsc_aux)
 		return false;
@@ -281,7 +281,7 @@ static int dm_dp_mst_get_modes(struct drm_connector *connector)
 
 	if (!aconnector->edid) {
 		struct edid *edid;
-		edid = drm_dp_mst_get_edid(connector, &aconnector->mst_port->mst_mgr, aconnector->port);
+		edid = drm_dp_mst_get_edid(connector, &aconnector->mst_root->mst_mgr, aconnector->mst_output_port);
 
 		if (!edid) {
 			amdgpu_dm_set_mst_status(&aconnector->mst_status,
@@ -410,15 +410,15 @@ dm_dp_mst_detect(struct drm_connector *connector,
 		 struct drm_modeset_acquire_ctx *ctx, bool force)
 {
 	struct amdgpu_dm_connector *aconnector = to_amdgpu_dm_connector(connector);
-	struct amdgpu_dm_connector *master = aconnector->mst_port;
-	struct drm_dp_mst_port *port = aconnector->port;
+	struct amdgpu_dm_connector *master = aconnector->mst_root;
+	struct drm_dp_mst_port *port = aconnector->mst_output_port;
 	int connection_status;
 
 	if (drm_connector_is_unregistered(connector))
 		return connector_status_disconnected;
 
 	connection_status = drm_dp_mst_detect_port(connector, ctx, &master->mst_mgr,
-							aconnector->port);
+							aconnector->mst_output_port);
 
 	if (port->pdt != DP_PEER_DEVICE_NONE && !port->dpcd_rev) {
 		uint8_t dpcd_rev;
@@ -475,8 +475,8 @@ static int dm_dp_mst_atomic_check(struct drm_connector *connector,
 				  struct drm_atomic_state *state)
 {
 	struct amdgpu_dm_connector *aconnector = to_amdgpu_dm_connector(connector);
-	struct drm_dp_mst_topology_mgr *mst_mgr = &aconnector->mst_port->mst_mgr;
-	struct drm_dp_mst_port *mst_port = aconnector->port;
+	struct drm_dp_mst_topology_mgr *mst_mgr = &aconnector->mst_root->mst_mgr;
+	struct drm_dp_mst_port *mst_port = aconnector->mst_output_port;
 
 	return drm_dp_atomic_release_time_slots(state, mst_mgr, mst_port);
 }
@@ -538,8 +538,8 @@ dm_dp_add_mst_connector(struct drm_dp_mst_topology_mgr *mgr,
 		return NULL;
 
 	connector = &aconnector->base;
-	aconnector->port = port;
-	aconnector->mst_port = master;
+	aconnector->mst_output_port = port;
+	aconnector->mst_root = master;
 	amdgpu_dm_set_mst_status(&aconnector->mst_status,
 			MST_PROBE, true);
 
@@ -940,7 +940,7 @@ static int compute_mst_dsc_configs_for_link(struct drm_atomic_state *state,
 		if (!aconnector)
 			continue;
 
-		if (!aconnector->port)
+		if (!aconnector->mst_output_port)
 			continue;
 
 		stream->timing.flags.DSC = 0;
@@ -948,7 +948,7 @@ static int compute_mst_dsc_configs_for_link(struct drm_atomic_state *state,
 		params[count].timing = &stream->timing;
 		params[count].sink = stream->sink;
 		params[count].aconnector = aconnector;
-		params[count].port = aconnector->port;
+		params[count].port = aconnector->mst_output_port;
 		params[count].clock_force_enable = aconnector->dsc_settings.dsc_force_enable;
 		if (params[count].clock_force_enable == DSC_CLK_FORCE_ENABLE)
 			debugfs_overwrite = true;
@@ -1157,7 +1157,7 @@ int compute_mst_dsc_configs_for_state(struct drm_atomic_state *state,
 
 		aconnector = (struct amdgpu_dm_connector *)stream->dm_stream_context;
 
-		if (!aconnector || !aconnector->dc_sink || !aconnector->port)
+		if (!aconnector || !aconnector->dc_sink || !aconnector->mst_output_port)
 			continue;
 
 		if (!aconnector->dc_sink->dsc_caps.dsc_dec_caps.is_dsc_supported)
@@ -1172,7 +1172,7 @@ int compute_mst_dsc_configs_for_state(struct drm_atomic_state *state,
 		if (!is_dsc_need_re_compute(state, dc_state, stream->link))
 			continue;
 
-		mst_mgr = aconnector->port->mgr;
+		mst_mgr = aconnector->mst_output_port->mgr;
 		ret = compute_mst_dsc_configs_for_link(state, dc_state, stream->link, vars, mst_mgr,
 						       &link_vars_start_index);
 		if (ret != 0)
@@ -1218,7 +1218,7 @@ static int pre_compute_mst_dsc_configs_for_state(struct drm_atomic_state *state,
 
 		aconnector = (struct amdgpu_dm_connector *)stream->dm_stream_context;
 
-		if (!aconnector || !aconnector->dc_sink || !aconnector->port)
+		if (!aconnector || !aconnector->dc_sink || !aconnector->mst_output_port)
 			continue;
 
 		if (!aconnector->dc_sink->dsc_caps.dsc_dec_caps.is_dsc_supported)
@@ -1230,7 +1230,7 @@ static int pre_compute_mst_dsc_configs_for_state(struct drm_atomic_state *state,
 		if (!is_dsc_need_re_compute(state, dc_state, stream->link))
 			continue;
 
-		mst_mgr = aconnector->port->mgr;
+		mst_mgr = aconnector->mst_output_port->mgr;
 		ret = compute_mst_dsc_configs_for_link(state, dc_state, stream->link, vars, mst_mgr,
 						       &link_vars_start_index);
 		if (ret != 0)
@@ -1445,8 +1445,8 @@ enum dc_status dm_dp_mst_is_port_support_mode(
 	 * with DSC enabled.
 	 */
 	if (is_dsc_common_config_possible(stream, &bw_range) &&
-	    aconnector->port->passthrough_aux) {
-		mst_mgr = aconnector->port->mgr;
+	    aconnector->mst_output_port->passthrough_aux) {
+		mst_mgr = aconnector->mst_output_port->mgr;
 		mutex_lock(&mst_mgr->lock);
 
 		cur_link_settings = stream->link->verified_link_cap;
@@ -1454,7 +1454,7 @@ enum dc_status dm_dp_mst_is_port_support_mode(
 		upper_link_bw_in_kbps = dc_link_bandwidth_kbps(aconnector->dc_link,
 							       &cur_link_settings
 							       );
-		down_link_bw_in_kbps = kbps_from_pbn(aconnector->port->full_pbn);
+		down_link_bw_in_kbps = kbps_from_pbn(aconnector->mst_output_port->full_pbn);
 
 		/* pick the bottleneck */
 		end_to_end_bw_in_kbps = min(upper_link_bw_in_kbps,
@@ -1478,7 +1478,7 @@ enum dc_status dm_dp_mst_is_port_support_mode(
 		bpp = convert_dc_color_depth_into_bpc(stream->timing.display_color_depth) * 3;
 		pbn = drm_dp_calc_pbn_mode(stream->timing.pix_clk_100hz / 10, bpp, false);
 
-		if (pbn > aconnector->port->full_pbn)
+		if (pbn > aconnector->mst_output_port->full_pbn)
 			return DC_FAIL_BANDWIDTH_VALIDATE;
 #if defined(CONFIG_DRM_AMD_DC_DCN)
 	}
-- 
2.39.0