From a68d2437d73188abe5d92d551cc63d6b67d8ce57 Mon Sep 17 00:00:00 2001
From: Mykola Lysenko <Mykola.Lysenko@amd.com>
Date: Mon, 7 Dec 2015 13:55:51 -0500
Subject: [PATCH] drm/dp/mst: reply with ACK for UP reqs
Git-commit: a68d2437d73188abe5d92d551cc63d6b67d8ce57
Patch-mainline: 4.5-rc1
References: bsc#991038

Currently we reply with NACK to UP requests which might
confuse receivers. We haven't seen any actual issues with
this but should still respond to UP requests correctly.

Signed-off-by: Mykola Lysenko <Mykola.Lysenko@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1449514552-10236-2-git-send-email-harry.wentland@amd.com
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Acked-by: Takashi Iwai <tiwai@suse.de>

---
 drivers/gpu/drm/drm_dp_mst_topology.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/gpu/drm/drm_dp_mst_topology.c
+++ b/drivers/gpu/drm/drm_dp_mst_topology.c
@@ -1945,7 +1945,7 @@ static int drm_dp_encode_up_ack_reply(st
 {
 	struct drm_dp_sideband_msg_reply_body reply;
 
-	reply.reply_type = 1;
+	reply.reply_type = 0;
 	reply.req_type = req_type;
 	drm_dp_encode_sideband_reply(&reply, msg);
 	return 0;
