drm/amd/display: Support external tunneling feature

[Why & How] The original code only supports the tunneling for embedded one. To support external tunneling feature, it needs to check Tunneling_Support bit register. Reviewed-by: Wenjing Liu <wenjing.liu@amd.com> Reviewed-by: Jun Lei <jun.lei@amd.com> Signed-off-by: Cruise Hung <Cruise.Hung@amd.com> Signed-off-by: Tom Chung <chiahsuan.chung@amd.com> Tested-by: Daniel Wheeler <daniel.wheeler@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2026-02-23 17:41:24 -05:00 · 2025-04-25 20:04:10 +08:00
parent fe1903bc95
commit 17accf4f22
14 changed files with 124 additions and 78 deletions
--- a/drivers/gpu/drm/amd/display/dc/core/dc_resource.c
+++ b/drivers/gpu/drm/amd/display/dc/core/dc_resource.c
@@ -3911,6 +3911,10 @@ enum dc_status resource_map_pool_resources(
 		if (!dc->link_srv->dp_decide_link_settings(stream,
 				&pipe_ctx->link_config.dp_link_settings))
 			return DC_FAIL_DP_LINK_BANDWIDTH;
+
+		dc->link_srv->dp_decide_tunnel_settings(stream,
+				&pipe_ctx->link_config.dp_tunnel_settings);
+
 		if (dc->link_srv->dp_get_encoding_format(
 				&pipe_ctx->link_config.dp_link_settings) == DP_128b_132b_ENCODING) {
 			pipe_ctx->stream_res.hpo_dp_stream_enc =
--- a/drivers/gpu/drm/amd/display/dc/dc_dp_types.h
+++ b/drivers/gpu/drm/amd/display/dc/dc_dp_types.h
@@ -159,6 +159,11 @@ struct dc_link_settings {
 	uint8_t link_rate_set;
 };

+struct dc_tunnel_settings {
+	bool should_enable_dp_tunneling;
+	bool should_use_dp_bw_allocation;
+};
+
 union dc_dp_ffe_preset {
 	struct {
 		uint8_t level		: 4;
@@ -943,10 +948,20 @@ union dpia_info {
 	uint8_t raw;
 };

+/* DPCD[0xE0020] USB4_DRIVER_BW_CAPABILITY register. */
+union usb4_driver_bw_cap {
+	struct {
+		uint8_t rsvd :7;
+		uint8_t driver_bw_alloc_support :1;
+	} bits;
+	uint8_t raw;
+};
+
 /* DP Tunneling over USB4 */
 struct dpcd_usb4_dp_tunneling_info {
 	union dp_tun_cap_support dp_tun_cap;
 	union dpia_info dpia_info;
+	union usb4_driver_bw_cap driver_bw_cap;
 	uint8_t usb4_driver_id;
 	uint8_t usb4_topology_id[DPCD_USB4_TOPOLOGY_ID_LEN];
 };
@@ -1486,5 +1501,11 @@ struct dp_trace {
 # ifndef DP_TUNNELING_BW_ALLOC_CAP_CHANGED
 # define DP_TUNNELING_BW_ALLOC_CAP_CHANGED		(1 << 3)
 # endif
+# ifndef DPTX_BW_ALLOC_UNMASK_IRQ
+# define DPTX_BW_ALLOC_UNMASK_IRQ			(1 << 6)
+# endif
+# ifndef DPTX_BW_ALLOC_MODE_ENABLE
+# define DPTX_BW_ALLOC_MODE_ENABLE			(1 << 7)
+# endif

 #endif /* DC_DP_TYPES_H */
--- a/drivers/gpu/drm/amd/display/dc/hwss/dcn35/dcn35_hwseq.c
+++ b/drivers/gpu/drm/amd/display/dc/hwss/dcn35/dcn35_hwseq.c
@@ -1550,7 +1550,7 @@ static bool should_avoid_empty_tu(struct pipe_ctx *pipe_ctx)
 	struct dc_link_settings *link_settings = &pipe_ctx->link_config.dp_link_settings;
 	const struct dc *dc = pipe_ctx->stream->link->dc;

-	if (pipe_ctx->stream->link->ep_type != DISPLAY_ENDPOINT_USB4_DPIA)
+	if (pipe_ctx->link_config.dp_tunnel_settings.should_enable_dp_tunneling == false)
 		return false;

 	// Not necessary for MST configurations
--- a/drivers/gpu/drm/amd/display/dc/inc/core_types.h
+++ b/drivers/gpu/drm/amd/display/dc/inc/core_types.h
@@ -384,7 +384,9 @@ struct link_resource {

 struct link_config {
 	struct dc_link_settings dp_link_settings;
+	struct dc_tunnel_settings dp_tunnel_settings;
 };
+
 union pipe_update_flags {
 	struct {
 		uint32_t enable : 1;
--- a/drivers/gpu/drm/amd/display/dc/inc/link.h
+++ b/drivers/gpu/drm/amd/display/dc/inc/link.h
@@ -207,6 +207,9 @@ struct link_service {
 	bool (*dp_decide_link_settings)(
 		struct dc_stream_state *stream,
 		struct dc_link_settings *link_setting);
+	void (*dp_decide_tunnel_settings)(
+		struct dc_stream_state *stream,
+		struct dc_tunnel_settings *dp_tunnel_setting);
 	enum dp_link_encoding (*mst_decide_link_encoding_format)(
 			const struct dc_link *link);
 	bool (*edp_decide_link_settings)(struct dc_link *link,
--- a/drivers/gpu/drm/amd/display/dc/link/link_detection.c
+++ b/drivers/gpu/drm/amd/display/dc/link/link_detection.c
@@ -611,6 +611,7 @@ static bool detect_dp(struct dc_link *link,
 		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;
+		link->dpcd_caps.usb4_dp_tun_info.dp_tun_cap.raw = 0;
 	}

 	return true;
@@ -1007,21 +1008,11 @@ static bool detect_link_and_local_sink(struct dc_link *link,
 					link->reported_link_cap.link_rate > LINK_RATE_HIGH3)
 				link->reported_link_cap.link_rate = LINK_RATE_HIGH3;

-			/*
-			 * If this is DP over USB4 link then we need to:
-			 * - Enable BW ALLOC support on DPtx if applicable
-			 */
-			if (dc->config.usb4_bw_alloc_support) {
-				if (link_dp_dpia_set_dptx_usb4_bw_alloc_support(link)) {
-					/* update with non reduced link cap if bw allocation mode is supported */
-					if (link->dpia_bw_alloc_config.nrd_max_link_rate &&
-						link->dpia_bw_alloc_config.nrd_max_lane_count) {
-						link->reported_link_cap.link_rate =
-							link->dpia_bw_alloc_config.nrd_max_link_rate;
-						link->reported_link_cap.lane_count =
-							link->dpia_bw_alloc_config.nrd_max_lane_count;
-					}
-				}
+			if (link->dpcd_caps.usb4_dp_tun_info.dp_tun_cap.bits.dp_tunneling
+					&& link->dpcd_caps.usb4_dp_tun_info.dp_tun_cap.bits.dpia_bw_alloc
+					&& link->dpcd_caps.usb4_dp_tun_info.driver_bw_cap.bits.driver_bw_alloc_support) {
+				if (link_dpia_enable_usb4_dp_bw_alloc_mode(link) == false)
+					link->dpcd_caps.usb4_dp_tun_info.dp_tun_cap.bits.dpia_bw_alloc = false;
 			}
 			break;
 		}
--- a/drivers/gpu/drm/amd/display/dc/link/link_dpms.c
+++ b/drivers/gpu/drm/amd/display/dc/link/link_dpms.c
@@ -2374,7 +2374,7 @@ void link_set_dpms_off(struct pipe_ctx *pipe_ctx)
 	update_psp_stream_config(pipe_ctx, true);
 	dc->hwss.blank_stream(pipe_ctx);

-	if (pipe_ctx->stream->link->ep_type == DISPLAY_ENDPOINT_USB4_DPIA)
+	if (pipe_ctx->link_config.dp_tunnel_settings.should_use_dp_bw_allocation)
 		deallocate_usb4_bandwidth(pipe_ctx->stream);

 	if (pipe_ctx->stream->signal == SIGNAL_TYPE_DISPLAY_PORT_MST)
@@ -2442,7 +2442,7 @@ void link_set_dpms_off(struct pipe_ctx *pipe_ctx)
 	if (link->connector_signal == SIGNAL_TYPE_EDP && dc->debug.psp_disabled_wa) {
 		/* reset internal save state to default since eDP is  off */
 		enum dp_panel_mode panel_mode = dp_get_panel_mode(pipe_ctx->stream->link);
-		/* since current psp not loaded, we need to reset it to default*/
+		/* since current psp not loaded, we need to reset it to default */
 		link->panel_mode = panel_mode;
 	}
 }
@@ -2620,7 +2620,7 @@ void link_set_dpms_on(
 	if (dc_is_dp_signal(pipe_ctx->stream->signal))
 		dp_set_hblank_reduction_on_rx(pipe_ctx);

-	if (pipe_ctx->stream->link->ep_type == DISPLAY_ENDPOINT_USB4_DPIA)
+	if (pipe_ctx->link_config.dp_tunnel_settings.should_use_dp_bw_allocation)
 		allocate_usb4_bandwidth(pipe_ctx->stream);

 	if (pipe_ctx->stream->signal == SIGNAL_TYPE_DISPLAY_PORT_MST)
--- a/drivers/gpu/drm/amd/display/dc/link/link_factory.c
+++ b/drivers/gpu/drm/amd/display/dc/link/link_factory.c
@@ -156,6 +156,7 @@ static void construct_link_service_dp_capability(struct link_service *link_srv)
 	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->dp_decide_tunnel_settings = link_decide_dp_tunnel_settings;
 	link_srv->mst_decide_link_encoding_format =
 			mst_decide_link_encoding_format;
 	link_srv->edp_decide_link_settings = edp_decide_link_settings;
--- 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
@@ -2021,11 +2021,9 @@ static bool retrieve_link_cap(struct dc_link *link)
 			sizeof(link->dpcd_caps.max_uncompressed_pixel_rate_cap.raw));

 	/* Read DP tunneling information. */
-	if (link->ep_type == DISPLAY_ENDPOINT_USB4_DPIA) {
-		status = dpcd_get_tunneling_device_data(link);
-		if (status != DC_OK)
-			dm_error("%s: Read DP tunneling device data failed.\n", __func__);
-	}
+	status = dpcd_get_tunneling_device_data(link);
+	if (status != DC_OK)
+		dm_error("%s: Read DP tunneling device data failed.\n", __func__);

 	retrieve_cable_id(link);
 	dpcd_write_cable_id_to_dprx(link);
--- 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
@@ -62,6 +62,36 @@ enum dc_status dpcd_get_tunneling_device_data(struct dc_link *link)
 	if (status != DC_OK)
 		goto err;

+	link->dpcd_caps.usb4_dp_tun_info.dp_tun_cap.raw =
+			dpcd_dp_tun_data[DP_TUNNELING_CAPABILITIES_SUPPORT - DP_TUNNELING_CAPABILITIES_SUPPORT];
+
+	if (link->dpcd_caps.usb4_dp_tun_info.dp_tun_cap.bits.dp_tunneling == false)
+		goto err;
+
+	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];
+
+	if (link->dpcd_caps.usb4_dp_tun_info.dp_tun_cap.bits.dpia_bw_alloc) {
+		status = core_link_read_dpcd(link, USB4_DRIVER_BW_CAPABILITY,
+				dpcd_dp_tun_data, 1);
+
+		if (status != DC_OK)
+			goto err;
+
+		link->dpcd_caps.usb4_dp_tun_info.driver_bw_cap.raw = dpcd_dp_tun_data[0];
+	}
+
+	DC_LOG_DEBUG("%s: Link[%d]  DP tunneling support  (RouterId=%d  AdapterId=%d)  "
+			"DPIA_BW_Alloc_support=%d "
+			"CM_BW_Alloc_support=%d ",
+			__func__, link->link_index,
+			link->dpcd_caps.usb4_dp_tun_info.usb4_driver_id,
+			link->dpcd_caps.usb4_dp_tun_info.dpia_info.bits.dpia_num,
+			link->dpcd_caps.usb4_dp_tun_info.dp_tun_cap.bits.dpia_bw_alloc,
+			link->dpcd_caps.usb4_dp_tun_info.driver_bw_cap.bits.driver_bw_alloc_support);
+
 	status = core_link_read_dpcd(
 			link,
 			DP_USB4_ROUTER_TOPOLOGY_ID,
@@ -71,13 +101,6 @@ enum dc_status dpcd_get_tunneling_device_data(struct dc_link *link)
 	if (status != DC_OK)
 		goto err;

-	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];

@@ -120,3 +143,20 @@ bool dpia_query_hpd_status(struct dc_link *link)
 	return link->hpd_status;
 }

+void link_decide_dp_tunnel_settings(struct dc_stream_state *stream,
+			struct dc_tunnel_settings *dp_tunnel_setting)
+{
+	struct dc_link *link = stream->link;
+
+	memset(dp_tunnel_setting, 0, sizeof(*dp_tunnel_setting));
+
+	if ((stream->signal == SIGNAL_TYPE_DISPLAY_PORT) || (stream->signal == SIGNAL_TYPE_DISPLAY_PORT_MST)) {
+		dp_tunnel_setting->should_enable_dp_tunneling =
+					link->dpcd_caps.usb4_dp_tun_info.dp_tun_cap.bits.dp_tunneling;
+
+		if (link->dpcd_caps.usb4_dp_tun_info.dp_tun_cap.bits.dpia_bw_alloc
+				&& link->dpcd_caps.usb4_dp_tun_info.driver_bw_cap.bits.driver_bw_alloc_support)
+			dp_tunnel_setting->should_use_dp_bw_allocation = true;
+	}
+}
+
--- 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
@@ -38,4 +38,10 @@ enum dc_status dpcd_get_tunneling_device_data(struct dc_link *link);
 * Returns true if HPD high.
 */
 bool dpia_query_hpd_status(struct dc_link *link);
+
+/* Decide the DP tunneling settings based on the DPCD capabilities
+ */
+void link_decide_dp_tunnel_settings(struct dc_stream_state *stream,
+			struct dc_tunnel_settings *dp_tunnel_setting);
+
 #endif /* __DC_LINK_DPIA_H__ */
--- 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
@@ -46,9 +46,10 @@
 */
 static bool link_dp_is_bw_alloc_available(struct dc_link *link)
 {
-	return (link && link->ep_type == DISPLAY_ENDPOINT_USB4_DPIA
-		&& link->hpd_status
-		&& link->dpia_bw_alloc_config.bw_alloc_enabled);
+	return (link && link->hpd_status
+		&& link->dpcd_caps.usb4_dp_tun_info.dp_tun_cap.bits.dp_tunneling
+		&& link->dpcd_caps.usb4_dp_tun_info.dp_tun_cap.bits.dpia_bw_alloc
+		&& link->dpcd_caps.usb4_dp_tun_info.driver_bw_cap.bits.driver_bw_alloc_support);
 }

 static void reset_bw_alloc_struct(struct dc_link *link)
@@ -141,7 +142,7 @@ static int get_non_reduced_max_lane_count(struct dc_link *link)
 * 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)
+static void retrieve_usb4_dp_bw_allocation_info(struct dc_link *link)
 {
 	reset_bw_alloc_struct(link);

@@ -282,49 +283,26 @@ static void link_dpia_send_bw_alloc_request(struct dc_link *link, int req_bw)
 // ------------------------------------------------------------------
 // PUBLIC FUNCTIONS
 // ------------------------------------------------------------------
-bool link_dp_dpia_set_dptx_usb4_bw_alloc_support(struct dc_link *link)
+bool link_dpia_enable_usb4_dp_bw_alloc_mode(struct dc_link *link)
 {
 	bool ret = false;
-	uint8_t response = 0,
-			bw_support_dpia = 0,
-			bw_support_cm = 0;
+	uint8_t val;

-	if (!(link->ep_type == DISPLAY_ENDPOINT_USB4_DPIA && link->hpd_status))
-		goto out;
+	if (link->hpd_status) {
+		val = DPTX_BW_ALLOC_MODE_ENABLE | DPTX_BW_ALLOC_UNMASK_IRQ;

-	if (core_link_read_dpcd(
-			link,
-			DP_TUNNELING_CAPABILITIES,
-			&response,
-			sizeof(uint8_t)) == DC_OK)
-		bw_support_dpia = (response >> 7) & 1;
+		if (core_link_write_dpcd(link, DPTX_BW_ALLOCATION_MODE_CONTROL, &val, sizeof(uint8_t)) == DC_OK) {
+			DC_LOG_DEBUG("%s:  link[%d] DPTX BW allocation mode enabled", __func__, link->link_index);

-	if (core_link_read_dpcd(
-		link,
-		USB4_DRIVER_BW_CAPABILITY,
-		&response,
-		sizeof(uint8_t)) == DC_OK)
-		bw_support_cm = (response >> 7) & 1;
+			retrieve_usb4_dp_bw_allocation_info(link);

-	/* Send request acknowledgment to Turn ON DPTX support */
-	if (bw_support_cm && bw_support_dpia) {
+			if (link->dpia_bw_alloc_config.nrd_max_link_rate && link->dpia_bw_alloc_config.nrd_max_lane_count) {
+				link->reported_link_cap.link_rate = link->dpia_bw_alloc_config.nrd_max_link_rate;
+				link->reported_link_cap.lane_count = link->dpia_bw_alloc_config.nrd_max_lane_count;
+			}

-		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 for link(%d)\n",
-				__func__, link->link_index);
-		} else {
-			// SUCCESS Enabled DPtx BW Allocation Mode Support
-			DC_LOG_DEBUG("%s: SUCCESS Enabling DPtx BW Allocation Mode Support for link(%d)\n",
-				__func__, link->link_index);
-
-			ret = true;
-			init_usb4_bw_struct(link);
 			link->dpia_bw_alloc_config.bw_alloc_enabled = true;
+			ret = true;

 			/*
 			 * During DP tunnel creation, CM preallocates BW and reduces estimated BW of other
@@ -332,11 +310,12 @@ bool link_dp_dpia_set_dptx_usb4_bw_alloc_support(struct dc_link *link)
 			 * to make the CM to release preallocation and update estimated BW correctly for
 			 * all DPIAs per host router
 			 */
+			// TODO: Zero allocation can be removed once the MSFT CM fix has been released
 			link_dp_dpia_allocate_usb4_bandwidth_for_stream(link, 0);
-		}
+		} else
+			DC_LOG_DEBUG("%s:  link[%d] failed to enable DPTX BW allocation mode", __func__, link->link_index);
 	}

-out:
 	return ret;
 }

@@ -378,7 +357,8 @@ void link_dp_dpia_handle_bw_alloc_status(struct dc_link *link, uint8_t status)
 */
 void dpia_handle_usb4_bandwidth_allocation_for_link(struct dc_link *link, int peak_bw)
 {
-	if (link && link->ep_type == DISPLAY_ENDPOINT_USB4_DPIA && link->dpia_bw_alloc_config.bw_alloc_enabled) {
+	if (link && link->dpcd_caps.usb4_dp_tun_info.dp_tun_cap.bits.dp_tunneling
+			&& link->dpia_bw_alloc_config.bw_alloc_enabled) {
 		//1. Hot Plug
 		if (link->hpd_status && peak_bw > 0) {
 			// If DP over USB4 then we need to check BW allocation
@@ -401,7 +381,7 @@ void link_dp_dpia_allocate_usb4_bandwidth_for_stream(struct dc_link *link, int r
 	if (link_dp_is_bw_alloc_available(link))
 		link_dpia_send_bw_alloc_request(link, req_bw);
 	else
-		DC_LOG_DEBUG("%s:  Not able to send the BW Allocation request", __func__);
+		DC_LOG_DEBUG("%s:  BW Allocation mode not available", __func__);
 }

 bool dpia_validate_usb4_bw(struct dc_link **link, int *bw_needed_per_dpia, const unsigned int num_dpias)
--- 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
@@ -43,13 +43,13 @@ enum bw_type {
 };

 /*
- * Enable BW Allocation Mode Support from the DP-Tx side
+ * Enable USB4 DP BW allocation mode
 *
 * @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);
+bool link_dpia_enable_usb4_dp_bw_alloc_mode(struct dc_link *link);

 /*
 * Allocates only what the stream needs for bw, so if:
--- 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
@@ -352,7 +352,7 @@ enum dc_status dp_read_hpd_rx_irq_data(
 			irq_data->raw,
 			DP_SINK_STATUS - DP_SINK_COUNT + 1);

-		if (link->ep_type == DISPLAY_ENDPOINT_USB4_DPIA) {
+		if (link->dpcd_caps.usb4_dp_tun_info.dp_tun_cap.bits.dp_tunneling) {
 			retval = core_link_read_dpcd(
 					link, DP_LINK_SERVICE_IRQ_VECTOR_ESI0,
 					&irq_data->bytes.link_service_irq_esi0.raw, 1);
@@ -521,7 +521,7 @@ bool dp_handle_hpd_rx_irq(struct dc_link *link,
 		dp_trace_link_loss_increment(link);
 	}

-	if (link->ep_type == DISPLAY_ENDPOINT_USB4_DPIA) {
+	if (link->dpcd_caps.usb4_dp_tun_info.dp_tun_cap.bits.dp_tunneling) {
 		if (hpd_irq_dpcd_data.bytes.link_service_irq_esi0.bits.DP_LINK_TUNNELING_IRQ)
 			dp_handle_tunneling_irq(link);
 	}