From patchwork Mon Feb 22 04:00:26 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Lin, Wayne" X-Patchwork-Id: 12097895 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=-16.6 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,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 5E48AC433E0 for ; Mon, 22 Feb 2021 04:02:28 +0000 (UTC) Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 0FB62601FB for ; Mon, 22 Feb 2021 04:02:28 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 0FB62601FB Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=amd.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=dri-devel-bounces@lists.freedesktop.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 640376E884; Mon, 22 Feb 2021 04:02:27 +0000 (UTC) Received: from NAM02-DM3-obe.outbound.protection.outlook.com (mail-dm3nam07on2052.outbound.protection.outlook.com [40.107.95.52]) by gabe.freedesktop.org (Postfix) with ESMTPS id 40DD289F8E for ; Mon, 22 Feb 2021 04:02:24 +0000 (UTC) ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=FtRsYI0nIL7bgUhHnuZi+wNj3p8VGFlWmx4TDUIhQbxX3w5g1ck47mteasLNAAv9aEyysKAIuL/3893ECfiyNDQcO8SGkf62urHbRi+UPXgAkbQDIdod68sgESEmkaVwIgLV8Gnkoklp8fn4kze4UF9IoerS/xMLGXVi5k7FzcR++Xjy+69P9HJLXv9r37XuStZi2BEVgSUqtfFQjwjeUlWIn+dYYG0001yn/KJ+HbhT6ARD411fSrk2sKWfOqBYIYbF2M7YNtq1OldF42Ki4JAcGFnB3Whn9bzC2YSrcWBPFn/uFkPUg9Ion3aW/nn7yWbkOCIDWTn0c+veg1KiEQ== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector9901; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=LPoWl1MY9+15FmhUDRTxiGfzV20DHMNHQXII4f1K7o4=; b=TpZWiLUPGqDFeoXOE3f9sGJ9gZnAgtLklOJJsVzbM1LMNvujfIzId8F+YPVTbR+KejDKnRdBLtxU6WhVqVQtCTzApEMagNeRHh7PpBe3nP/uN9+4vFkteQdEW+mP8DOxy5VufAxog0sY5ZHKHtk+GR98Iqd9ouUKj+tm/iKeYPM6/w11wA7UcIYiLzwMJoCFUaVLyt6avd+b3ABnL3oITMQDZ3ja8MKwBZ0w4CZv3czlBtERkmEVgKZiXvRCr2TgBtvdqXYPNv6xMWlWOidE+ra9GTiAmxyMhDLGFn0SrbJwwJoQBz1LKqKHzliosEF+iqK3Uda/2HdEJWiglZmHeA== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=softfail (sender ip is 165.204.84.17) smtp.rcpttodomain=lists.freedesktop.org smtp.mailfrom=amd.com; dmarc=fail (p=none sp=none pct=100) action=none header.from=amd.com; dkim=none (message not signed); arc=none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=amd.com; s=selector1; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=LPoWl1MY9+15FmhUDRTxiGfzV20DHMNHQXII4f1K7o4=; b=EPcdFMvAeuOj+tRJV4XMFjkAYufW273ciSFsytqMvXpYO5zrC9lmrle79B6xaAlpL73x/HJllYm2Sk19AEVXaLcOVglDp8w5VjkC7CrVVx/3zBQsYawth1Gjz/vkh+KDhknZRz709wVQBAZez2d2biB5FwRcyzlURjxpQdSM5h8= Received: from CO2PR04CA0116.namprd04.prod.outlook.com (2603:10b6:104:7::18) by DM6PR12MB3225.namprd12.prod.outlook.com (2603:10b6:5:188::19) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.3868.27; Mon, 22 Feb 2021 04:02:22 +0000 Received: from CO1NAM11FT053.eop-nam11.prod.protection.outlook.com (2603:10b6:104:7:cafe::35) by CO2PR04CA0116.outlook.office365.com (2603:10b6:104:7::18) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.3868.27 via Frontend Transport; Mon, 22 Feb 2021 04:02:22 +0000 X-MS-Exchange-Authentication-Results: spf=softfail (sender IP is 165.204.84.17) smtp.mailfrom=amd.com; lists.freedesktop.org; dkim=none (message not signed) header.d=none;lists.freedesktop.org; dmarc=fail action=none header.from=amd.com; Received-SPF: SoftFail (protection.outlook.com: domain of transitioning amd.com discourages use of 165.204.84.17 as permitted sender) Received: from SATLEXMB01.amd.com (165.204.84.17) by CO1NAM11FT053.mail.protection.outlook.com (10.13.175.63) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.20.3868.27 via Frontend Transport; Mon, 22 Feb 2021 04:02:19 +0000 Received: from SATLEXMB01.amd.com (10.181.40.142) by SATLEXMB01.amd.com (10.181.40.142) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.1979.3; Sun, 21 Feb 2021 22:02:19 -0600 Received: from wayne-System-Product-Name.amd.com (10.180.168.240) by SATLEXMB01.amd.com (10.181.40.142) with Microsoft SMTP Server id 15.1.1979.3 via Frontend Transport; Sun, 21 Feb 2021 22:02:16 -0600 From: Wayne Lin To: Subject: [PATCH 1/2] drm/dp_mst: Revise broadcast msg lct & lcr Date: Mon, 22 Feb 2021 12:00:26 +0800 Message-ID: <20210222040027.23505-2-Wayne.Lin@amd.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20210222040027.23505-1-Wayne.Lin@amd.com> References: <20210222040027.23505-1-Wayne.Lin@amd.com> MIME-Version: 1.0 X-EOPAttributedMessage: 0 X-MS-Office365-Filtering-HT: Tenant X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: 39f02de0-7c1e-4cda-0962-08d8d6e6a6f6 X-MS-TrafficTypeDiagnostic: DM6PR12MB3225: X-Microsoft-Antispam-PRVS: X-MS-Oob-TLC-OOBClassifiers: OLM:983; X-MS-Exchange-SenderADCheck: 1 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:165.204.84.17; CTRY:US; LANG:en; SCL:1; SRV:; IPV:NLI; SFV:NSPM; H:SATLEXMB01.amd.com; PTR:ErrorRetry; CAT:NONE; SFS:(4636009)(346002)(376002)(136003)(396003)(39860400002)(46966006)(36840700001)(82310400003)(6666004)(70586007)(36756003)(6916009)(8676002)(4326008)(81166007)(86362001)(426003)(36860700001)(356005)(8936002)(26005)(83380400001)(54906003)(47076005)(2906002)(316002)(478600001)(70206006)(1076003)(5660300002)(4744005)(2616005)(7696005)(186003)(82740400003)(336012)(36900700001); DIR:OUT; SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 22 Feb 2021 04:02:19.7543 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 39f02de0-7c1e-4cda-0962-08d8d6e6a6f6 X-MS-Exchange-CrossTenant-Id: 3dd8961f-e488-4e60-8e11-a82d994e183d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=3dd8961f-e488-4e60-8e11-a82d994e183d; Ip=[165.204.84.17]; Helo=[SATLEXMB01.amd.com] X-MS-Exchange-CrossTenant-AuthSource: CO1NAM11FT053.eop-nam11.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: DM6PR12MB3225 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: eryk.brol@amd.com, qingqing.zhuo@amd.com, stable@vger.kernel.org, jerry.zuo@amd.com, Wayne Lin , Nicholas.Kazlauskas@amd.com Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" [Why & How] According to DP spec, broadcast message LCT equals to 1 and LCR equals to 6. Current implementation is incorrect. Fix it. Signed-off-by: Wayne Lin Cc: stable@vger.kernel.org --- drivers/gpu/drm/drm_dp_mst_topology.c | 10 ++++++++-- 1 file changed, 8 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/drm_dp_mst_topology.c b/drivers/gpu/drm/drm_dp_mst_topology.c index 17dbed0a9800..713ef3b42054 100644 --- a/drivers/gpu/drm/drm_dp_mst_topology.c +++ b/drivers/gpu/drm/drm_dp_mst_topology.c @@ -2727,8 +2727,14 @@ static int set_hdr_from_dst_qlock(struct drm_dp_sideband_msg_hdr *hdr, else hdr->broadcast = 0; hdr->path_msg = txmsg->path_msg; - hdr->lct = mstb->lct; - hdr->lcr = mstb->lct - 1; + if (hdr->broadcast) { + hdr->lct = 1; + hdr->lcr = 6; + } else { + hdr->lct = mstb->lct; + hdr->lcr = mstb->lct - 1; + } + if (mstb->lct > 1) memcpy(hdr->rad, mstb->rad, mstb->lct / 2);