drm/amd/display: populate link res in both detection and validation

[why]
This commit is to populate link res in preparation of the next commit.
The next commit will replace all existing code to use link res instead

Tested-by: Daniel Wheeler <[email protected]>
Reviewed-by: Jun Lei <[email protected]>
Acked-by: Rodrigo Siqueira <[email protected]>
Signed-off-by: Wenjing Liu <[email protected]>
Signed-off-by: Alex Deucher <[email protected]>

Author: Wenjing Liu

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

@@ -881,6 +881,7 @@ static bool dc_link_detect_helper(struct dc_link *link,
 	enum dc_connection_type pre_connection_type = dc_connection_none;
 	bool perform_dp_seamless_boot = false;
 	const uint32_t post_oui_delay = 30; // 30ms
+	struct link_resource link_res = { 0 };
 
 	DC_LOGGER_INIT(link->ctx->logger);
 
@@ -974,8 +975,10 @@ static bool dc_link_detect_helper(struct dc_link *link,
 			}
 
 #if defined(CONFIG_DRM_AMD_DC_DCN)
-			if (dp_get_link_encoding_format(&link->reported_link_cap) == DP_128b_132b_ENCODING)
+			if (dp_get_link_encoding_format(&link->reported_link_cap) == DP_128b_132b_ENCODING) {
 				add_dp_hpo_link_encoder_to_link(link);
+				link_res.hpo_dp_link_enc = link->hpo_dp_link_enc;
+			}
 #endif
 
 			if (link->type == dc_connection_mst_branch) {
@@ -986,7 +989,7 @@ static bool dc_link_detect_helper(struct dc_link *link,
 				 * empty which leads to allocate_mst_payload() has "0"
 				 * pbn_per_slot value leading to exception on dc_fixpt_div()
 				 */
-				dp_verify_mst_link_cap(link, NULL);
+				dp_verify_mst_link_cap(link, &link_res);
 
 				/*
 				 * This call will initiate MST topology discovery. Which
@@ -1150,7 +1153,7 @@ static bool dc_link_detect_helper(struct dc_link *link,
 			// verify link cap for SST non-seamless boot
 			if (!perform_dp_seamless_boot)
 				dp_verify_link_cap_with_retries(link,
-								NULL,
+								&link_res,
 								&link->reported_link_cap,
 								LINK_TRAINING_MAX_VERIFY_RETRY);
 		} else {

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

@@ -2161,6 +2161,7 @@ enum dc_status resource_map_pool_resources(
 					&context->res_ctx, pool,
 					pipe_ctx->stream_res.hpo_dp_stream_enc,
 					true);
+			pipe_ctx->link_res.hpo_dp_link_enc = stream->link->hpo_dp_link_enc;
 		}
 	}
 #endif

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

@@ -336,7 +336,11 @@ struct plane_resource {
 
 /* all mappable hardware resources used to enable a link */
 struct link_resource {
+#if defined(CONFIG_DRM_AMD_DC_DCN)
+	struct hpo_dp_link_encoder *hpo_dp_link_enc;
+#else
 	void *dummy;
+#endif
 };
 
 union pipe_update_flags {