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Miller" , Eric Dumazet , "Jakub Kicinski" , Paolo Abeni , Daniel Golle , Vladimir Oltean , , Subject: Re: Question: net: phy: realtek: RTL8211FS SGMII bridge mode support Date: Fri, 10 Jul 2026 23:17:03 +0900 Message-ID: <20260710141707.3280954-1-jackyhuang@nvidia.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <9d4bab68-6383-4b8d-a9d0-144b348e937c@bootlin.com> References: <20260709035244.3008436-1-jackyhuang@nvidia.com> <9d4bab68-6383-4b8d-a9d0-144b348e937c@bootlin.com> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain X-ClientProxiedBy: rnnvmail202.nvidia.com (10.129.68.7) To rnnvmail201.nvidia.com (10.129.68.8) X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: CY4PEPF0000EE33:EE_|MW4PR12MB6974:EE_ X-MS-Office365-Filtering-Correlation-Id: cd53ae87-fda0-4e2c-a97c-08dede8e1e3a X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|7416014|376014|23010399003|36860700016|82310400026|1800799024|6133799003|56012099006|4143699003|11063799006|22082099003|18002099003|3023799007; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:216.228.117.160;CTRY:US;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:mail.nvidia.com;PTR:dc6edge1.nvidia.com;CAT:NONE;SFS:(13230040)(7416014)(376014)(23010399003)(36860700016)(82310400026)(1800799024)(6133799003)(56012099006)(4143699003)(11063799006)(22082099003)(18002099003)(3023799007);DIR:OUT;SFP:1101; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: 0i2BqcT3KJGSBQxq6MS5PXLnBa7uDAC2Dieh8aKRYCANrmo4jaxedyxKmFoMQ4O/bp5iXLchpC248ezK1dBSxpm7chXZsjeI2nd1CL7IZKJLQHUMLpoJzSl//gtqb/CjVYEiX8vJK4UngzNK18VHe7BAS6LZvNUvV05NEVVvK0+7XESGm9OiCwZncUN8+JB16yrfwNIqVWZ2kNn+hTTv6k8icV1oiQeehBFadWdTgXnovL+EQbI2W+VXo6L4qLj/AJTx4FmGuDFHFiMBlDV2UIccWTb/UDFbrhc/mt1MioQJ6dFQ2s1nwTAICPoJq19bFJyszI9v0Fc9syHoltezqTp0pGR0k9wdnR6IOaqxrUAHOzDHe+DD9bLilFJdrq4NhFMwWXh20mCKOdf1NuduXhdsuJFA4acx95qxVpK+UWh359ZfR5TCr8tECsubzzzl X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 10 Jul 2026 14:18:30.5782 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: cd53ae87-fda0-4e2c-a97c-08dede8e1e3a X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=43083d15-7273-40c1-b7db-39efd9ccc17a;Ip=[216.228.117.160];Helo=[mail.nvidia.com] X-MS-Exchange-CrossTenant-AuthSource: CY4PEPF0000EE33.namprd05.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: MW4PR12MB6974 Hi Maxime, Thanks for the feedback! I had not considered the SFP or additional PHY case before. The hardware we plan to support has the SGMII side permanently connected to an Ethernet switch. MAC - RGMII - RTL8211FS - SGMII - Ethernet switch The switch is initialized from a configuration EEPROM. There is no SFP or separate PHY on the SGMII link. I will take another look at how the SGMII-side status and in-band aneg should be handled. In addition, after reviewing the board-level strap design, I found that the intended mode may not always be selected reliably, so I still need to consider a strap-override flow. Thanks again, Jacky