This is a note to let you know that I've just added the patch titled drm/dp_mst: Set CLEAR_PAYLOAD_ID_TABLE as broadcast to the 5.12-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: drm-dp_mst-set-clear_payload_id_table-as-broadcast.patch and it can be found in the queue-5.12 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. >From d919d3d6cdb31d0f9fe06c880f683a24f2838813 Mon Sep 17 00:00:00 2001 From: Wayne Lin <Wayne.Lin@xxxxxxx> Date: Wed, 24 Feb 2021 18:15:21 +0800 Subject: drm/dp_mst: Set CLEAR_PAYLOAD_ID_TABLE as broadcast From: Wayne Lin <Wayne.Lin@xxxxxxx> commit d919d3d6cdb31d0f9fe06c880f683a24f2838813 upstream. [Why & How] According to DP spec, CLEAR_PAYLOAD_ID_TABLE is a path broadcast request message and current implementation is incorrect. Fix it. Signed-off-by: Wayne Lin <Wayne.Lin@xxxxxxx> Cc: stable@xxxxxxxxxxxxxxx Reviewed-by: Lyude Paul <lyude@xxxxxxxxxx> Signed-off-by: Lyude Paul <lyude@xxxxxxxxxx> Link: https://patchwork.freedesktop.org/patch/msgid/20210224101521.6713-3-Wayne.Lin@xxxxxxx Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- drivers/gpu/drm/drm_dp_mst_topology.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) --- a/drivers/gpu/drm/drm_dp_mst_topology.c +++ b/drivers/gpu/drm/drm_dp_mst_topology.c @@ -1154,6 +1154,7 @@ static void build_clear_payload_id_table req.req_type = DP_CLEAR_PAYLOAD_ID_TABLE; drm_dp_encode_sideband_req(&req, msg); + msg->path_msg = true; } static int build_enum_path_resources(struct drm_dp_sideband_msg_tx *msg, @@ -2824,7 +2825,8 @@ static int set_hdr_from_dst_qlock(struct req_type = txmsg->msg[0] & 0x7f; if (req_type == DP_CONNECTION_STATUS_NOTIFY || - req_type == DP_RESOURCE_STATUS_NOTIFY) + req_type == DP_RESOURCE_STATUS_NOTIFY || + req_type == DP_CLEAR_PAYLOAD_ID_TABLE) hdr->broadcast = 1; else hdr->broadcast = 0; Patches currently in stable-queue which might be from Wayne.Lin@xxxxxxx are queue-5.12/drm-dp_mst-revise-broadcast-msg-lct-lcr.patch queue-5.12/drm-dp_mst-set-clear_payload_id_table-as-broadcast.patch