From nobody Fri Feb 13 15:42:36 2026 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 26338CD4F3B for ; Fri, 22 Sep 2023 09:35:35 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233158AbjIVJfi (ORCPT ); Fri, 22 Sep 2023 05:35:38 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:52682 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233030AbjIVJfa (ORCPT ); Fri, 22 Sep 2023 05:35:30 -0400 Received: from NAM11-DM6-obe.outbound.protection.outlook.com (mail-dm6nam11on2111.outbound.protection.outlook.com [40.107.223.111]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 6393C19C for ; Fri, 22 Sep 2023 02:35:24 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=Q0S4aViD9HmqAXl/24f35dl+Ly2rcQAHO/hGWmIi3S9zoN1LYxpf9zIpuCgy/ekAXgZAwFo9vHIbtuo3Ae6ohok7lG1HBja/ev/kcfOOn/TO+XX9MT3xgk/qGNYU3OOvWI0YxIZNgqTvN4e7frFownQaR/llphUtTQiA3M8xYVt1ghVokgtNu6DBh2Tph8mEclRTq9/mra/cJkfxnT+Kc+o+XWOgxRCzTKkCbLCtJyizjAxapxufsyy3M1qRMeIgRTE4+nRiUuls1ek7ZhHQ7ylPuGJfwXN3kA8GbRx3JpTQaa+bLOIk1cs1GFx8wT9pD+xoeSW7tJVIRqa/q98TsQ== 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-AntiSpam-MessageData-ChunkCount:X-MS-Exchange-AntiSpam-MessageData-0:X-MS-Exchange-AntiSpam-MessageData-1; bh=4SWMohgR48+Z7ATdvITsU+9kcNSbC/Zm9qf8mMGNwGE=; b=AmycBqkthcumKngbsgXK/QAU4+bN3WZdW5kkoAUTt3dxFB5uJ/c2nHiMhNS68HjAwoR9xiAmSgA39JY8EbAclBlrYpACrizFO1hG+1X7jh81b8fFiDZrTTIk8SZP5w3hEtvpjwyh5kOw5r5bPRO670ir04Wk0l0xV/vgGJuJW8u06nzhL4HRtrK4mZIMQ2twOPGr+1/7tJTatq/S0VcW+8ZV5J8EOS112Z0JPGcIOfcfK8hR5lumpljNd8kGlEgdwZgvu2Isw0mEdYXQQd6ZkVX+ANG9rJf0OC74A1a4RI9QOZdc+2dbFs4ql1wYkfZbEMU9lYfseSX2HpRDgpdCfQ== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass smtp.mailfrom=analogixsemi.com; dmarc=pass action=none header.from=analogixsemi.com; dkim=pass header.d=analogixsemi.com; arc=none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=Analogixsemi.onmicrosoft.com; s=selector2-Analogixsemi-onmicrosoft-com; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=4SWMohgR48+Z7ATdvITsU+9kcNSbC/Zm9qf8mMGNwGE=; b=JTDuzNaNfnIyBFA45brYIA06JCMP7Z0XuO503iDv898UdBgV/NTOSrrCKbN9TfcRsj9XyV+oainVzUpROzMcthIpQBxSZUjnGymtSEULS32w5gb8F0VBzVSQPKKSLCyCLeoedIMp5w1Fr4SdJ+Zm5Ma4r4i0NvkZFWl/cP6PLbY= Authentication-Results: dkim=none (message not signed) header.d=none;dmarc=none action=none header.from=analogixsemi.com; Received: from BY5PR04MB6739.namprd04.prod.outlook.com (2603:10b6:a03:229::8) by IA0PR04MB8836.namprd04.prod.outlook.com (2603:10b6:208:486::16) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.6838.10; Fri, 22 Sep 2023 09:35:21 +0000 Received: from BY5PR04MB6739.namprd04.prod.outlook.com ([fe80::cd38:f20f:5778:a25]) by BY5PR04MB6739.namprd04.prod.outlook.com ([fe80::cd38:f20f:5778:a25%7]) with mapi id 15.20.6838.010; Fri, 22 Sep 2023 09:35:19 +0000 From: Xin Ji To: Andrzej Hajda , Neil Armstrong , Robert Foss , Laurent Pinchart , Jonas Karlman , Jernej Skrabec , David Airlie , Daniel Vetter Cc: bliang@analogixsemi.com, qwen@analogixsemi.com, hsinyi@chromium.org, Xin Ji , dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org Subject: [PATCH v2] drm/bridge: Add 200ms delay to wait FW HPD status stable Date: Fri, 22 Sep 2023 17:34:49 +0800 Message-Id: <20230922093450.3574349-1-xji@analogixsemi.com> X-Mailer: git-send-email 2.25.1 Content-Transfer-Encoding: quoted-printable X-ClientProxiedBy: SG2PR02CA0041.apcprd02.prod.outlook.com (2603:1096:3:18::29) To BY5PR04MB6739.namprd04.prod.outlook.com (2603:10b6:a03:229::8) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: BY5PR04MB6739:EE_|IA0PR04MB8836:EE_ X-MS-Office365-Filtering-Correlation-Id: 1dbc6357-05c4-4a4e-40e2-08dbbb4f3c6a X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:255.255.255.255;CTRY:;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:BY5PR04MB6739.namprd04.prod.outlook.com;PTR:;CAT:NONE;SFS:(13230031)(346002)(396003)(376002)(366004)(39850400004)(136003)(186009)(1800799009)(451199024)(110136005)(6512007)(316002)(38350700002)(26005)(38100700002)(66946007)(1076003)(66556008)(66476007)(36756003)(41300700001)(2616005)(478600001)(6486002)(6506007)(52116002)(6666004)(7416002)(4744005)(2906002)(83380400001)(86362001)(8676002)(8936002)(4326008)(5660300002);DIR:OUT;SFP:1102; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: =?us-ascii?Q?AquI0YzhsO6z0W9O9wO/ooulAGNoPqoMhj0raWSmEQMQR7H90BfAX3GKRpTo?= =?us-ascii?Q?N/o2rHfd5ocT5x+MRuoUPE92AOb4cmunfVNqs6cGlnD3+upgHuQ7G3vS4Exi?= =?us-ascii?Q?6X6D3tzHX+7mnjn0UU8e/djtPxynT4HvcDFWDb3vjHJrol/P9ZER4RISytmT?= =?us-ascii?Q?BcVil/798lCoT8zPg6o0OH0tmAg5r/CCldWLmTxXWSRjJOAxNsOCl+qTT1BP?= =?us-ascii?Q?mH8IWdvTc2mCCMoSLUVEzCqHvk5dk9ff6L3n1JOD7SK4v4XyNx6s4cOuYmL4?= =?us-ascii?Q?5Ug+cU9LghIkk6177VhBLYGqCLY+TY/pEBuO+5dknDcLW8LHR59eyr/MqNVE?= =?us-ascii?Q?RAUX99fHfMV+TU/+xEXpakV5yXWnCgDErcZiVc9vsIKdEEJou3K0L8klkmqt?= =?us-ascii?Q?1R0Uc1YlCvF6JtV2trlCJtohe7KOfZbLeKjdff16D2dtvuwBAsG0U4/jMBFn?= =?us-ascii?Q?herXk1pCNTtZBqw3AMTJc2ehszOD0vWn1JUctvxwbDiDaouD77eeZ9IyqBDp?= =?us-ascii?Q?+yaFVKRZFti8o2t6MxjUeTq6Ir3NPPUfnRrhQuSXgi90IWiid7GUNh5tj7+s?= =?us-ascii?Q?JcvR9xz7jUtlc+72sTPkDgzUxpAAjl2IgT0ihoJF7Mpv2BX+BF1Qklz/1CwK?= =?us-ascii?Q?gdmyOs/noPAwyvPNoDEvjo560RmUVtiwfgN7DL1YpTnY22tHnbewvfuAuB/a?= =?us-ascii?Q?Vv/jDC+/XnRowGfucha87lCK1AlXSytHYrLUSPzmu/i8oKt4Cmr2In9Ta0zc?= =?us-ascii?Q?IcER7aZDkZF4WpqgQVLb0qDYhnpM/d5LUoIGv1DU07gDd2SSm2v3wYkf13jF?= =?us-ascii?Q?TShPiiCTfVbYVFM1OHIMyxOQx7rjIqvBB/l+ciwxJJKZNWm4flKdTtPhhmI9?= =?us-ascii?Q?jkS7wNDzx40qmdXLPnzti2Ch9BqFJowZqTUSSiXRdNrIg0Z0PvvNHaYGTeKR?= =?us-ascii?Q?s6KuaBC01PuvAm1vqQE6pTjjrXrVPiikThMWEj/IMm3AAz3KgVD9wsSJYD6L?= =?us-ascii?Q?Ituzeq9KUUyy8E0AmESvEIDLooCJCHpgez7VmCK4qU3yWPmo8ZJhbJz6wv+4?= =?us-ascii?Q?WUaci09ok8Wyi46y9IMQVZpFFvmdD1EtffoU5wYEdcLzkqi0/9Us9uJgHSgG?= =?us-ascii?Q?hyVfp50kvUxd11Oa7DPhNz6BPIucDex+FQi5iOLdKgg9w1xWUtYV30dqynF9?= =?us-ascii?Q?CTQb5fAnVyw4EUhHEj7vkuWH/0G7hmurNQFsKWYjoEREfDfUQMaTTd42jl4B?= =?us-ascii?Q?8EDr9eUGTIFHCpqxipjzSIGE7o1A0h6SCPFPtjHtp+tTaUvgx0YyIpamNP43?= =?us-ascii?Q?YISah/Ixpo6GtwaOJ+t7dP12CNz/ue9BEZUNlmFLAqnVJ4j9oO7hCYR+ZIjq?= =?us-ascii?Q?jxFsjrstF6YhGxLBGWFI7iG2R7JTrLrLUokv2uQuFTukJAsx5qFd8a1Og0Ie?= =?us-ascii?Q?3n64U/YJ+UqJ+EyvTNMIbQUATIYQgvestrG+XxjHISbPvKJMuLsUDhI8fLAf?= =?us-ascii?Q?ueTmIqBqFy1p1vvleXq+iQhTePTlhJjU9AHL+3nQL0F3m5tmc+Wm2K8ZqVYX?= =?us-ascii?Q?OSQBVexSkW7YL1KK4N25etwxsj+vsAeN2kDrbSRy?= X-OriginatorOrg: analogixsemi.com X-MS-Exchange-CrossTenant-Network-Message-Id: 1dbc6357-05c4-4a4e-40e2-08dbbb4f3c6a X-MS-Exchange-CrossTenant-AuthSource: BY5PR04MB6739.namprd04.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 22 Sep 2023 09:35:19.5119 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: b099b0b4-f26c-4cf5-9a0f-d5be9acab205 X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: FhwDKxEOz796zM41H3S2JZMaTso6J0ZuQ63IqPkvBvXM0U1OmHZ1YekTiLXZ7JyjgTg3+3snFrna0L2S9CteYw== X-MS-Exchange-Transport-CrossTenantHeadersStamped: IA0PR04MB8836 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" For the no-interrupt design (sink device is panel, polling HPD status when chip power on), anx7625 FW has more than 200ms HPD de-bounce time in FW, for the safety to get HPD status, driver better to wait 200ms before HPD detection after OS resume back. Signed-off-by: Xin Ji --- drivers/gpu/drm/bridge/analogix/anx7625.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/gpu/drm/bridge/analogix/anx7625.c b/drivers/gpu/drm/br= idge/analogix/anx7625.c index 51abe42c639e..8f740154707d 100644 --- a/drivers/gpu/drm/bridge/analogix/anx7625.c +++ b/drivers/gpu/drm/bridge/analogix/anx7625.c @@ -1464,6 +1464,9 @@ static int _anx7625_hpd_polling(struct anx7625_data *= ctx, if (ctx->pdata.intp_irq) return 0; =20 + /* Delay 200ms for FW HPD de-bounce */ + msleep(200); + ret =3D readx_poll_timeout(anx7625_read_hpd_status_p0, ctx, val, ((val & HPD_STATUS) || (val < 0)), --=20 2.25.1