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    Subject[PATCH 5.11 068/601] drm/dp_mst: Set CLEAR_PAYLOAD_ID_TABLE as broadcast
    Date
    From: Wayne Lin <Wayne.Lin@amd.com>

    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@amd.com>
    Cc: stable@vger.kernel.org
    Reviewed-by: Lyude Paul <lyude@redhat.com>
    Signed-off-by: Lyude Paul <lyude@redhat.com>
    Link: https://patchwork.freedesktop.org/patch/msgid/20210224101521.6713-3-Wayne.Lin@amd.com
    Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
    ---
    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;

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