From: Samson Tam <Samson.Tam@amd.com>
Date: Fri, 7 Sep 2018 14:13:55 +0000 (-0400)
Subject: drm/amd/display: use proper pipe_ctx index
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=a978f65765e2ccefb22eb77940685ae60c05ff6c;p=linux.git

drm/amd/display: use proper pipe_ctx index

Use link->link_index as index to pipe_ctx[] to get proper link
information instead of using index 0 to avoid potential miss matches.

Signed-off-by: Samson Tam <Samson.Tam@amd.com>
Reviewed-by: Anthony Koo <Anthony.Koo@amd.com>
Acked-by: Bhawanpreet Lakha <Bhawanpreet.Lakha@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
---

diff --git a/drivers/gpu/drm/amd/display/dc/core/dc.c b/drivers/gpu/drm/amd/display/dc/core/dc.c
index 1c438eedf77a7..7d9be87140cc9 100644
--- a/drivers/gpu/drm/amd/display/dc/core/dc.c
+++ b/drivers/gpu/drm/amd/display/dc/core/dc.c
@@ -460,9 +460,25 @@ void dc_link_set_preferred_link_settings(struct dc *dc,
 					 struct dc_link_settings *link_setting,
 					 struct dc_link *link)
 {
+	int i;
+	struct pipe_ctx *pipe;
+	struct dc_stream_state *link_stream;
 	struct dc_link_settings store_settings = *link_setting;
-	struct dc_stream_state *link_stream =
-		link->dc->current_state->res_ctx.pipe_ctx[0].stream;
+
+	for (i = 0; i < MAX_PIPES; i++) {
+		pipe = &dc->current_state->res_ctx.pipe_ctx[i];
+		if (pipe->stream && pipe->stream->sink
+			&& pipe->stream->sink->link) {
+			if (pipe->stream->sink->link == link)
+				break;
+		}
+	}
+
+	/* Stream not found */
+	if (i == MAX_PIPES)
+		return;
+
+	link_stream = link->dc->current_state->res_ctx.pipe_ctx[i].stream;
 
 	link->preferred_link_setting = store_settings;
 	if (link_stream)