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Mon, 23 Feb 2026 10:46:09 -0800 From: Manikanta Maddireddy To: , , , , , , , , , , , , , , , , , , <18255117159@163.com> CC: , , , Manikanta Maddireddy Subject: [PATCH v6 2/9] PCI: tegra194: Calibrate P2U for endpoint mode Date: Tue, 24 Feb 2026 00:15:31 +0530 Message-ID: <20260223184538.3084753-3-mmaddireddy@nvidia.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20260223184538.3084753-1-mmaddireddy@nvidia.com> References: <20260223184538.3084753-1-mmaddireddy@nvidia.com> Precedence: bulk X-Mailing-List: linux-pci@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: rnnvmail201.nvidia.com (10.129.68.8) To rnnvmail201.nvidia.com (10.129.68.8) X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: SJ1PEPF000023D6:EE_|CH0PR12MB8549:EE_ X-MS-Office365-Filtering-Correlation-Id: 771df833-c95d-429c-83dc-08de730bdedc X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|1800799024|376014|82310400026|7416014|36860700013|921020; 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This helps to reset stale PLL state from the previous bad link state. Signed-off-by: Vidya Sagar Signed-off-by: Manikanta Maddireddy --- Changes V1 -> V6: 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 f026af7c2ce0..51bad99cec31 100644 --- a/drivers/pci/controller/dwc/pcie-tegra194.c +++ b/drivers/pci/controller/dwc/pcie-tegra194.c @@ -1058,6 +1058,9 @@ 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