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drm/dp/mst: reply with ACK for UP reqs
author
Mykola Lysenko
<Mykola.Lysenko@amd.com>
Mon, 7 Dec 2015 18:55:51 +0000
(13:55 -0500)
committer
Daniel Vetter
<daniel.vetter@ffwll.ch>
Tue, 15 Dec 2015 09:22:28 +0000
(10:22 +0100)
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>
drivers/gpu/drm/drm_dp_mst_topology.c
patch
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diff --git
a/drivers/gpu/drm/drm_dp_mst_topology.c
b/drivers/gpu/drm/drm_dp_mst_topology.c
index
809959d
..
64a0a37
100644
(file)
--- a/
drivers/gpu/drm/drm_dp_mst_topology.c
+++ b/
drivers/gpu/drm/drm_dp_mst_topology.c
@@
-1823,7
+1823,7
@@
static int drm_dp_encode_up_ack_reply(struct drm_dp_sideband_msg_tx *msg, u8 req
{
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;