drm/amd/display: move dc_link functions in link root folder to dc_link_exports

[why]
link component should only have one interface serving dc.

[how]
We are moving dc_link functions exposed to DM to dc_link_exports
and unify link component interface in link.h with function pointer
to match the style of other dc component. This is the second step to move
dc_link functions under link root folder to dc_link_exports.
Reviewed-by: Jun Lei <Jun.Lei@amd.com>
Acked-by: Qingqing Zhuo <qingqing.zhuo@amd.com>
Signed-off-by: Wenjing Liu <wenjing.liu@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/display/dc/core/dc_link_exports.c

@@ -264,3 +264,18 @@ unsigned int dc_dp_trace_get_link_loss_count(struct dc_link *link)
 {
 	return link->dc->link_srv->dp_trace_get_link_loss_count(link);
 }
+
+struct dc_sink *dc_link_add_remote_sink(
+		struct dc_link *link,
+		const uint8_t *edid,
+		int len,
+		struct dc_sink_init_data *init_data)
+{
+	return link->dc->link_srv->add_remote_sink(link, edid, len, init_data);
+}
+
+void dc_link_remove_remote_sink(struct dc_link *link, struct dc_sink *sink)
+{
+	link->dc->link_srv->remove_remote_sink(link, sink);
+}
+

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

@@ -49,6 +49,12 @@ struct link_init_data {
 };
 
 struct link_service {
+	struct dc_sink *(*add_remote_sink)(
+			struct dc_link *link,
+			const uint8_t *edid,
+			int len,
+			struct dc_sink_init_data *init_data);
+	void (*remove_remote_sink)(struct dc_link *link, struct dc_sink *sink);
 	void (*dp_handle_automated_test)(struct dc_link *link);
 	bool (*dp_set_test_pattern)(
 			struct dc_link *link,

drivers/gpu/drm/amd/display/dc/link/link_detection.c

@@ -1327,7 +1327,7 @@ static bool link_add_remote_sink_helper(struct dc_link *dc_link, struct dc_sink
 	return true;
 }
 
-struct dc_sink *dc_link_add_remote_sink(
+struct dc_sink *link_add_remote_sink(
 		struct dc_link *link,
 		const uint8_t *edid,
 		int len,
@@ -1385,7 +1385,7 @@ struct dc_sink *dc_link_add_remote_sink(
 	return NULL;
 }
 
-void dc_link_remove_remote_sink(struct dc_link *link, struct dc_sink *sink)
+void link_remove_remote_sink(struct dc_link *link, struct dc_sink *sink)
 {
 	int i;
 

drivers/gpu/drm/amd/display/dc/link/link_detection.h

@@ -26,5 +26,11 @@
 #ifndef __DC_LINK_DETECTION_H__
 #define __DC_LINK_DETECTION_H__
 #include "link.h"
+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);
 
 #endif /* __DC_LINK_DETECTION_H__ */

drivers/gpu/drm/amd/display/dc/link/link_dpms.c

@@ -1000,7 +1000,7 @@ static void enable_stream_features(struct pipe_ctx *pipe_ctx)
 	}
 }
 
-static void dc_log_vcp_x_y(const struct dc_link *link, struct fixed31_32 avg_time_slots_per_mtp)
+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;
@@ -1516,7 +1516,7 @@ static enum dc_status allocate_mst_payload(struct pipe_ctx *pipe_ctx)
 	pbn = get_pbn_from_timing(pipe_ctx);
 	avg_time_slots_per_mtp = dc_fixpt_div(pbn, pbn_per_slot);
 
-	dc_log_vcp_x_y(link, avg_time_slots_per_mtp);
+	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);
@@ -1669,7 +1669,7 @@ static enum dc_status update_sst_payload(struct pipe_ctx *pipe_ctx,
 	if (!allocate) {
 		avg_time_slots_per_mtp = dc_fixpt_from_int(0);
 
-		dc_log_vcp_x_y(link, avg_time_slots_per_mtp);
+		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,
@@ -1720,7 +1720,7 @@ static enum dc_status update_sst_payload(struct pipe_ctx *pipe_ctx,
 			DP_128b_132b_ENCODING) {
 		avg_time_slots_per_mtp = link_calculate_sst_avg_time_slots_per_mtp(stream, link);
 
-		dc_log_vcp_x_y(link, avg_time_slots_per_mtp);
+		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,

drivers/gpu/drm/amd/display/dc/link/link_factory.c

@@ -27,6 +27,7 @@
  * This file owns the creation/destruction of link structure.
  */
 #include "link_factory.h"
+#include "link_detection.h"
 #include "accessories/link_dp_cts.h"
 #include "accessories/link_dp_trace.h"
 #include "accessories/link_fpga.h"
@@ -43,6 +44,8 @@
 		__VA_ARGS__)
 
 static struct link_service link_srv = {
+	.add_remote_sink = link_add_remote_sink,
+	.remove_remote_sink = link_remove_remote_sink,
 	.dp_handle_automated_test = dp_handle_automated_test,
 	.dp_set_test_pattern = dp_set_test_pattern,
 	.dp_set_preferred_link_settings = dp_set_preferred_link_settings,
@@ -197,7 +200,7 @@ static enum channel_id get_ddc_line(struct dc_link *link)
 	return channel;
 }
 
-static bool dc_link_construct_phy(struct dc_link *link,
+static bool construct_phy(struct dc_link *link,
 			      const struct link_init_data *init_params)
 {
 	uint8_t i;
@@ -489,7 +492,7 @@ static bool dc_link_construct_phy(struct dc_link *link,
 	return false;
 }
 
-static bool dc_link_construct_dpia(struct dc_link *link,
+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 };
@@ -559,9 +562,9 @@ static bool link_construct(struct dc_link *link,
 {
 	/* Handle dpia case */
 	if (init_params->is_dpia_link == true)
-		return dc_link_construct_dpia(link, init_params);
+		return construct_dpia(link, init_params);
 	else
-		return dc_link_construct_phy(link, init_params);
+		return construct_phy(link, init_params);
 }
 
 struct dc_link *link_create(const struct link_init_data *init_params)