From mboxrd@z Thu Jan 1 00:00:00 1970 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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 30B42D2CDE0 for ; Thu, 4 Dec 2025 22:57:29 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:MIME-Version:In-Reply-To: Content-Transfer-Encoding:Content-Type:References:Message-ID:Subject:Cc:To: From:Date:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=9n2hLeF90JM55DiLyLWpF44Mb14SVuc9O8g06rv2/u4=; b=UVEywETb+rhofuC95KnpSRBJE+ XVrHkbKwV7F5eo5FX6ArsEi4EjKSDkDwSlTaamiUUR8VtmTmB1/QaXmJSOjXkWv+MoYYMDNxGNjws 4xNqhyeCSuG2u7IwX7t/GxtZxsPfhfQ0Hqvo/V1Hr+IQqzSDGRmeu+lQ2YJoQecQB46/2drR6o9OK 0FUKrY7qOptKH7/CLrbV33VM60288rPf0aKKxpvtK6+V2HSMSlgtfYrzUpl8t4r77zmkte3ylU0Va 14Ln5+l4Fl4BpvM//m+FwdPmDLsa+RYUhV3IAUCBvb2pXrF7fdKxQgTUgwe44cd9oFcyoJslYtso8 DyqUjH/g==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1vRIGI-00000008kbJ-1Hxn; Thu, 04 Dec 2025 22:57:22 +0000 Received: from mail-westeuropeazlp170110003.outbound.protection.outlook.com ([2a01:111:f403:c201::3] helo=AS8PR04CU009.outbound.protection.outlook.com) by bombadil.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1vRIGG-00000008kar-10AN for linux-arm-kernel@lists.infradead.org; Thu, 04 Dec 2025 22:57:21 +0000 ARC-Seal: i=1; a=rsa-sha256; s=arcselector10001; d=microsoft.com; cv=none; b=S5N9vgqtA7AHJb6Bje5+El0TN5IsBLYD0rYmpwrlNXbdB6FFTWDgVwity/UYbzr3/9sgwU7CVQIzfEQQsFTgL/tltq1PZDxQ8ljYgv46MVuC4TbdWg7UQZv8BSRHEYs87pUxMAhnugYHfEzu2z+aYZ++689caAe5cTJobJ4IMeoasuHMABxECFWJLPIdg38NqlTQjUzUg8woWtgD+zmEj5VlRi+gCVLorhBhPEyy46Fkj/wPEp4emuNDYwl7pmiu9dws7W6WeQSt/fiyxEkir5uecCNkT47GLbQm2BBP7v7EbMzSeHkSYE8XWMDaCxm4Lerd5N6My9sHaEBdXRWa9Q== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector10001; 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=dBH63vqC79r8PoCw1Y+1pGebx5MITXibNh0y2AXFLWk=; b=MjdXPcIOXFQgRgEkAh57v2m5s/2YctgJatIlSvLFEQnpAABCGcGH/AEpv4WtQth6hLJiANE9KpNFd6H6Ju8tENO+JXIFqXoo7S4rStwPiPJ8uy5RD8uccEpWWqsnAgS1QwNUviv7fvD0L6891Kq48SHijQ1ncMtlGOZncwF7ANYadoaTfME6zN/T1PFIC2JrcgpihuBmsQbNUAUTIpAUjC/i1pTwygHeyVUuWks/mOIlHVxuiVWWGBejo+a8EqtUY7UnPI/5qytqtxjL+3Y7ekYHRkJe5Wck1xNKZxtd7GTzM6Yx8Ig4WQU4RO4RqhHDbx+buxQkbks9+IBG8mR67A== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass smtp.mailfrom=nxp.com; dmarc=pass action=none header.from=nxp.com; dkim=pass header.d=nxp.com; arc=none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=nxp.com; s=selector1; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=dBH63vqC79r8PoCw1Y+1pGebx5MITXibNh0y2AXFLWk=; b=coRQy7OY6ThEf3G+SQKeTK1O7TZjYrL8PiQm/QcBJtHJiiMauXARZwiGgs9aiS6y+fAKiXNXKdrq3yjycm+flHd+3auRh3KeMO6PZnb1bQaqIGqnsBW0EerJqVDERtOLXPKNnotUDkpHXnrURbzMs2vbeQGSjs6usCCPFd6sNfGBY+K1lQhYRTiThyfBNZj+HxQL3Np6udJORWMyIQJl4ux5S9ciVswevvc1QCXN5B51avCBggWOQZo1Qvrvsf5FA8xuBZOHSklIyc44U9B5YTD/eI4grFaOtUiQl3FBLYyopKRPQL3blF5WuudLEFNLxLB7I0i3dHKI9/Lpzfq7nA== Authentication-Results: dkim=none (message not signed) header.d=none;dmarc=none action=none header.from=nxp.com; Received: from DU2PR04MB8951.eurprd04.prod.outlook.com (2603:10a6:10:2e2::22) by PR3PR04MB7209.eurprd04.prod.outlook.com (2603:10a6:102:92::11) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.9388.9; Thu, 4 Dec 2025 22:57:15 +0000 Received: from DU2PR04MB8951.eurprd04.prod.outlook.com ([fe80::753c:468d:266:196]) by DU2PR04MB8951.eurprd04.prod.outlook.com ([fe80::753c:468d:266:196%4]) with mapi id 15.20.9388.003; Thu, 4 Dec 2025 22:57:15 +0000 Date: Thu, 4 Dec 2025 17:57:05 -0500 From: Frank Li To: Nicolas Dufresne Cc: ming.qian@oss.nxp.com, linux-media@vger.kernel.org, mchehab@kernel.org, hverkuil-cisco@xs4all.nl, benjamin.gaignard@collabora.com, p.zabel@pengutronix.de, sebastian.fricke@collabora.com, shawnguo@kernel.org, ulf.hansson@linaro.org, s.hauer@pengutronix.de, kernel@pengutronix.de, festevam@gmail.com, linux-imx@nxp.com, l.stach@pengutronix.de, peng.fan@nxp.com, eagle.zhou@nxp.com, imx@lists.linux.dev, linux-pm@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org Subject: Re: [PATCH v3 3/3] media: verisilicon: Avoid G2 bus error while decoding H.264 and HEVC Message-ID: References: <20251204090813.595-1-ming.qian@oss.nxp.com> <20251204090813.595-3-ming.qian@oss.nxp.com> <9f38bda2f1753645a1ae392ce5364ea0165fdc01.camel@ndufresne.ca> Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <9f38bda2f1753645a1ae392ce5364ea0165fdc01.camel@ndufresne.ca> X-ClientProxiedBy: PH7PR17CA0030.namprd17.prod.outlook.com (2603:10b6:510:323::25) To DU2PR04MB8951.eurprd04.prod.outlook.com (2603:10a6:10:2e2::22) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: DU2PR04MB8951:EE_|PR3PR04MB7209:EE_ X-MS-Office365-Filtering-Correlation-Id: 6d2ee007-6d3a-43bf-530b-08de33887793 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|19092799006|1800799024|52116014|7416014|366016|376014|38350700014; X-Microsoft-Antispam-Message-Info: =?iso-8859-1?Q?iHgkRaUsfKw/uphzvP5EPDTI8D+csfB1QWNw7laWXyFvHLJo0Dv7WMeUWc?= =?iso-8859-1?Q?Rsh3aEFGua7ecs5x2/iY2nfwJj03gVYRa2E/3pKYBkyGh3Hh/J4FZKa1dI?= =?iso-8859-1?Q?v0yzetmg8TPQxVQ5Cd+272/4D00VbuY529g0DIQ7QU0d94aJ2yGvqZZOrV?= =?iso-8859-1?Q?5NgsqFvO/2cys4BPyygUqu6Rv26aG2VFqjMvSy9RX/i6GW9skXFKJ2uR2U?= =?iso-8859-1?Q?okWVAuFWClkCgA4WjBQPLNhTAeh2YigyLlEoyQOYwaZL0QeoXd0jsdum1b?= =?iso-8859-1?Q?8CqVvQnMpeN56Mz6RScnW8mNgj2qq53fcLZKdfBX4+pMYqlSnG+PTrcXCb?= =?iso-8859-1?Q?JwLfsyhI8Op8FC3M8eReWfZiziaOe2Nv66oEYVFS+MDNBgaiqGFLWQYbIe?= =?iso-8859-1?Q?VbYWDBLWwyj/eeP66B+4Z6ORG4fM5h4crJTtv5n1cgmZipdIOvNPAQelcT?= =?iso-8859-1?Q?HmiI1B2rcR8+71b7pKT6O9nZWT8r+Nhx06uSyLU2p4vnIEo6pAYlr5QMVX?= =?iso-8859-1?Q?f4DEMa90loHicYREJVl2FWPc6a92SSkpjE530EOP/RQ524UaTGNve/LUmQ?= =?iso-8859-1?Q?yZ21SWpKKEQFcnEpwoU69jwm3Vejwsgxe0hHwDjwoVsA1cKGLsgrX4o16Y?= =?iso-8859-1?Q?EYg/tnAHnxWSJvpJ/fyKl0KAJMBsXvkRmXyJcSe1Lyettn+NzgiK7zoJ9i?= =?iso-8859-1?Q?FxSWP/Jpoa2gNcpKOIeR0fpCUUIVwC37CAH6Co8dXueyZ+Gake6bq2hUVn?= =?iso-8859-1?Q?Ki2Ei4YVej1vzazXMMOsKz0ELN4M1JMqszNpjtYavcBylWP7hLqqvjsv/j?= =?iso-8859-1?Q?mZ4x3bBf+VC1KOAASa4+6XuwrxyLEiW7SKGdT5hv38CBzj+3mqcW2dhFvU?= =?iso-8859-1?Q?wgwl2bc4S0RexgN3n5ODHa/uYabY2yWX9NyjNBKRT3KcxHC8Ira0olrAUd?= =?iso-8859-1?Q?gLX+QBszht7SdNXPN33Ynjfj9GiYpfH40MQsAR5G2Z1NdgwjEQLRxn/br3?= =?iso-8859-1?Q?FaMPudm2qCCi8hmku0G53nB7WYKadXV63o0QyWwediysanwQri5xxiF7kc?= =?iso-8859-1?Q?U9eVv14m618/GTZrbcB8paQFKTsqZ1yg2pZjZ1FwDbG2n/H55+wT2YDnuz?= =?iso-8859-1?Q?pN4BVx1+x+oCJfBgjkLAdysSKEUHFZ1LZnOeLXtuay+IOjTmQpooVBEERG?= =?iso-8859-1?Q?x+gbjHIrfNaTLFHVQShImiLyieHgcp2XX7ckgcENwYbII8qyyyvxpm3aJu?= =?iso-8859-1?Q?HoH3oCz0/6iViiGLEe69SXrtEffTxblaGskbXNdEfvMrNmpq9p4fk2AMH7?= =?iso-8859-1?Q?DRhBqRfUp/HLMF3F8mvUmgicTrPhygilYX3fx/sBllI76Hh3mIKY6cP+Pd?= =?iso-8859-1?Q?bu3WoMOHxOOCI2wOwzz5FTStW6ZiUKrS6PbHhCB7H7BecszQMCHLmSEyYO?= =?iso-8859-1?Q?0WipaO7S1YNWzEPsyjCnG3pT/tHWdvBAMg4G1S8jb2+W8xLl4sFFE/DJ42?= =?iso-8859-1?Q?Hb3r14A9gNFr6BXJmYIven/UvgMNsGLX8bRl1pa2qBF8M1oqbLfz1nZfPT?= =?iso-8859-1?Q?krd8Kp4jfJuz0zglSpM3zZG9qPi4?= X-Forefront-Antispam-Report: CIP:255.255.255.255;CTRY:;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:DU2PR04MB8951.eurprd04.prod.outlook.com;PTR:;CAT:NONE;SFS:(13230040)(19092799006)(1800799024)(52116014)(7416014)(366016)(376014)(38350700014);DIR:OUT;SFP:1101; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: =?iso-8859-1?Q?QMDSO6cvPD9ovm2lHxsEzHHduSYiLSbT+yu1Lj+j5XHZFR7muNx0k7l/fK?= =?iso-8859-1?Q?gdrCc5nf9U5CgRspPnt+WLLkFuI2tJQ6694n+QI6RJGpVDhy+qzR3Ph7Ne?= =?iso-8859-1?Q?VxiV6D/j3/MMsar3ue0elvEcLSyIiysTQqGmEHE3U1nbvdeiIpBgKeePkj?= =?iso-8859-1?Q?9HXtjX76tXcAj04uSl0GZBGIGYf9uXvaxf3VlSfvSkOctlmUPY1uhXZjni?= =?iso-8859-1?Q?+Ei/B15C0kzO83llgp8nsxsdmFMQpbwE5ZUB06Trj24H469GFkqhVJRrHc?= =?iso-8859-1?Q?/GPznnTHhck/EFk3BGxauitzyp7asHHCynPIZod8c2JYyMwdEQbH707jqn?= =?iso-8859-1?Q?sjCWETUT3RGn007QEbDEsREy+A6s9Rt9NrWFirObSf6FoeWwlQ44If9Fd2?= =?iso-8859-1?Q?tpICQZEU6s9Ti8LV2LK/uFfqrK2v+b2nwiWj5PAWnD0z2bWjUCtzFlTJ3z?= =?iso-8859-1?Q?Rqn0XKwFbZzt70dL7WVSRDTkSSrrLRw4CQ7v/bndsTpF+8gdK+q3gVzGbX?= =?iso-8859-1?Q?rW353pIBjXJ1+ejLT0p7awvA6su+OZbfqyOuPiQWtiO++8m2rJlbPAR3yC?= =?iso-8859-1?Q?s4i2yTt3E0UI1ttwUkivuh6xS/5Gz4BAanWQv61nhpk04Nhtn32G60cwt4?= =?iso-8859-1?Q?3G0sgizUgP4g6xAfrAmiU/QTWQBKTBeaFxZH8Uuo+drb7OaIDtgaZFcNtW?= =?iso-8859-1?Q?pYwrNFPAg7LcgeLu2MA6iXJh4/cYTj5SrMEum8904HZ6WkLOq7nCU8Wt+O?= =?iso-8859-1?Q?c+76MbLn4U1U+vWpUtadldpXwlEcPxT+6YcpFdj0CTJqzkuyn12kfCUAEc?= =?iso-8859-1?Q?cIapkBjeRETBwlOu8yczcZUbDthMUbifvQZ1lkYxCDy07DGORfZMJWp2YS?= =?iso-8859-1?Q?ZgoZZeS7aB1fhXn7z4wcqg7U4l7SRUmVZUXlQPfW50kAQpfR/G76ujcDWp?= =?iso-8859-1?Q?k8meOP2hRAK1xuNJQfUpWPjzq9QMfEMgRHqOEoNLZCKUrZHtoqcX863r67?= =?iso-8859-1?Q?iQE3m2CxIZjmXZKF7r6Yv7750YwJ+GsPRenJs5Fe2fNipyNo26KDgEUUgO?= =?iso-8859-1?Q?8exZSFVAQ1iFHV5+7QgYTFR8DD/1rVuj9Hsok52P/Y5wswWmua0xCl/0re?= =?iso-8859-1?Q?hxJFVaUwkDEt8h2JqojPW4deI4qVSBTSmB5p4H/WwykX2G+3Rb5iYVIXEL?= =?iso-8859-1?Q?iXu1Tia9lCEyMmWSLl8FP7XDvXSUGGk6wX+2QiFOgmnkW6tMBb2/F7vvAH?= =?iso-8859-1?Q?6DukkA/Po6v14HvDdrQLoLDiA2W7fC97nAm28mT7su1/FIT3Da5kzgHv7V?= =?iso-8859-1?Q?JwXxSZlYc4lWFiS2wf+iuHG33lxHcRSfpKSLSsrL53JaR+hFDGLGiXMtzT?= =?iso-8859-1?Q?9ttV7RHiCHPC78xWkovvaLn0v+jzAsxJAcgH+1E9iGiZCFGVGsAg84KQ/8?= =?iso-8859-1?Q?mQTkCv+PFSl6GF9eO60HM5DsZOLbqRr6V9J8LOlLGM/oSiG0bO3zLUVy7A?= =?iso-8859-1?Q?1Ww+sxV6q54DLxZ7X3Wg12PrFPpVYOV8OhsBgVH6mVujskgLaQ23jvrKFN?= =?iso-8859-1?Q?XAF/5LgHK7hlhTAX3Lgf58VU7xJeoYKy0zBrLFj+17uXOfJrOo/Va/tq+f?= =?iso-8859-1?Q?A5XYMhSXwQ7qol6EGtEH50hYySEaNehzar?= X-OriginatorOrg: nxp.com X-MS-Exchange-CrossTenant-Network-Message-Id: 6d2ee007-6d3a-43bf-530b-08de33887793 X-MS-Exchange-CrossTenant-AuthSource: DU2PR04MB8951.eurprd04.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 04 Dec 2025 22:57:15.5864 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 686ea1d3-bc2b-4c6f-a92c-d99c5c301635 X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: K2CcPk1kMaY3i2OxxRx3PdkZoEIjJBjwOuBwmkmcAdDRZBP1M27ylGwFGSriBnCl9k8N+RpSlzymkOc6zmeq9w== X-MS-Exchange-Transport-CrossTenantHeadersStamped: PR3PR04MB7209 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20251204_145720_282636_18424281 X-CRM114-Status: GOOD ( 16.80 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Thu, Dec 04, 2025 at 01:15:35PM -0500, Nicolas Dufresne wrote: > Hi Frank, > > Le jeudi 04 décembre 2025 à 12:34 -0500, Frank Li a écrit : > > > +static struct v4l2_m2m_dev *hantro_get_v4l2_m2m_dev(struct hantro_dev *vpu) > > > +{ > > > + struct device_node *node; > > > + struct hantro_dev *shared_vpu; > > > + > > > + if (!vpu->variant || !vpu->variant->shared_devices) > > > + goto init_new_m2m_dev; > > > > I found only use shared_devices here, how to  ensure that g1 and g2 operate > > alternately by using shared_devices? > > shared_devices is an array of of_device_id we match against. All the matching > devices will share the same v4l2_m2m_dev (aka m2m scheduler). Typically, both > cores will be schedule as one. This achieve what alternate operations without > active polling or blocking locks/mutex. Okay, but this code require shared_devices==NULL's device probe firstly. generally not order guaranteed, if there are not depentance at DT. Does VPU always probe before g1/g2? and if there are two VPU instances, what's happen? Frank > > For this platform, we only matched against the compatible for simplicity, since > we know there is only one of each type. I've suggested this method to Ming, > since it will make it really easy to apply such a quirk if other hardware have > problems or design constraints. > > regards, > Nicolas