drm/dp/mst: reply with ACK for UP reqs
authorMykola Lysenko <Mykola.Lysenko@amd.com>
Mon, 7 Dec 2015 18:55:51 +0000 (13:55 -0500)
committerDaniel 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

index 809959d56d7826364b540204a16190aaf270f9c4..64a0a37296435f0c9b81ddcc232ec2413d3fb494 100644 (file)
@@ -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;