From patchwork Wed May 12 14:42:25 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg Kroah-Hartman X-Patchwork-Id: 436786 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-19.4 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER, INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id AA1C2C433B4 for ; Wed, 12 May 2021 16:01:32 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 78D1461076 for ; Wed, 12 May 2021 16:01:32 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236256AbhELQCi (ORCPT ); Wed, 12 May 2021 12:02:38 -0400 Received: from mail.kernel.org ([198.145.29.99]:37078 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S237744AbhELP4S (ORCPT ); Wed, 12 May 2021 11:56:18 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 3499D61453; Wed, 12 May 2021 15:28:21 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1620833301; bh=tvYm0EGFUqeYlgwdXWIFOc77jLjBntRRaa/VugxJFn4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=etw1GVda/jxnhPcRw1lPXAZ9MCRZp5hh9MTEt91sh6AhF+Z58kpN4nOEj1alQjNR2 zhhvIL807rUtBztUzncFunIpJ+5Mefpaa1QvV5mBgIL0XvPMVhJHwHExQDazedAu2h rAu50b+g+Xo5nvWC9KUbzsWQxR5kQL1dzRiZdbBo= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Wayne Lin , Lyude Paul Subject: [PATCH 5.11 068/601] drm/dp_mst: Set CLEAR_PAYLOAD_ID_TABLE as broadcast Date: Wed, 12 May 2021 16:42:25 +0200 Message-Id: <20210512144830.051154699@linuxfoundation.org> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20210512144827.811958675@linuxfoundation.org> References: <20210512144827.811958675@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Wayne Lin 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 Cc: stable@vger.kernel.org Reviewed-by: Lyude Paul Signed-off-by: Lyude Paul Link: https://patchwork.freedesktop.org/patch/msgid/20210224101521.6713-3-Wayne.Lin@amd.com Signed-off-by: Greg Kroah-Hartman --- 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;