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Mon, 2 Mar 2026 22:58:25 -0800 From: Manikanta Maddireddy To: , , , , , , , , , , , , , , , , , , <18255117159@163.com> CC: , , , Manikanta Maddireddy Subject: [PATCH v7 2/9] PCI: tegra194: Calibrate P2U for Endpoint mode Date: Tue, 3 Mar 2026 12:27:51 +0530 Message-ID: <20260303065758.2364340-3-mmaddireddy@nvidia.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20260303065758.2364340-1-mmaddireddy@nvidia.com> References: <20260303065758.2364340-1-mmaddireddy@nvidia.com> Precedence: bulk X-Mailing-List: linux-tegra@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-NVConfidentiality: public 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: BN2PEPF000044AC:EE_|DS0PR12MB7900:EE_ X-MS-Office365-Filtering-Correlation-Id: 6e8336b0-3547-4c6c-3468-08de78f250d9 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|1800799024|36860700013|82310400026|7416014|376014|921020; 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X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: o7SzXODrLzENguE/BCGzpC6G6eJ6AocS60qAJq5uPMjLQGeWyJ3PiSHUwNzRvqFmGx4UotVhKdGMEPIw9lnETS/K7Q/ZKL7cD8gsUYf7rle/QKUkHKXHoTQQvnWyKESQn9Z2/8+19akwNc5L9aRPC7nqo3gMZS85a2HqeYv2kfybNDhTGFJXJCbQHnnOW2V61YzjVmu5FW/CUZx53rSFM4ZckXZYTN8iVOGH/AuaR6uaGe1fpF78iuFXplCgAlzWV2DATLZwxWB2wQbXdWUzhlz110B2TOXdjOrp5XdXV3E9fbkfwDnRHMMBkypksq2M6Ip0G/3/WLk5D3NnHrXd5M62JcRopTkivu/gAW+foVx8/2eYRFzgUbkIOKnANRwhtIiW76M7eydpIG9n/jXtupYJ30cjGou1POIK9irKD0jRbgtACxDYIZR9VHkaCDRX X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 03 Mar 2026 06:58:46.5178 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 6e8336b0-3547-4c6c-3468-08de78f250d9 X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=43083d15-7273-40c1-b7db-39efd9ccc17a;Ip=[216.228.117.161];Helo=[mail.nvidia.com] X-MS-Exchange-CrossTenant-AuthSource: BN2PEPF000044AC.namprd04.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: DS0PR12MB7900 From: Vidya Sagar Calibrate P2U for Endpoint controller to request UPHY PLL rate change to Gen1 during initialization. This helps to reset stale PLL state from the previous bad link state. Reviewed-by: Jon Hunter Tested-by: Jon Hunter Signed-off-by: Vidya Sagar Signed-off-by: Manikanta Maddireddy --- Changes V1 -> V7: None drivers/pci/controller/dwc/pcie-tegra194.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/pci/controller/dwc/pcie-tegra194.c b/drivers/pci/controller/dwc/pcie-tegra194.c index 2f1f882fc737..980988b7499c 100644 --- a/drivers/pci/controller/dwc/pcie-tegra194.c +++ b/drivers/pci/controller/dwc/pcie-tegra194.c @@ -1054,6 +1054,9 @@ static int tegra_pcie_enable_phy(struct tegra_pcie_dw *pcie) ret = phy_power_on(pcie->phys[i]); if (ret < 0) goto phy_exit; + + if (pcie->of_data->mode == DW_PCIE_EP_TYPE) + phy_calibrate(pcie->phys[i]); } return 0; -- 2.34.1