From: Mykola Lysenko Date: Mon, 7 Dec 2015 18:55:51 +0000 (-0500) Subject: drm/dp/mst: reply with ACK for UP reqs X-Git-Tag: v4.9.8~2860^2~24^2~32 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=a68d2437d73188abe5d92d551cc63d6b67d8ce57;p=platform%2Fkernel%2Flinux-rpi3.git drm/dp/mst: reply with ACK for UP reqs 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 Reviewed-by: Alex Deucher Link: http://patchwork.freedesktop.org/patch/msgid/1449514552-10236-2-git-send-email-harry.wentland@amd.com Signed-off-by: Daniel Vetter --- diff --git a/drivers/gpu/drm/drm_dp_mst_topology.c b/drivers/gpu/drm/drm_dp_mst_topology.c index 809959d..64a0a37 100644 --- 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;