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dkim=none (message not signed) header.d=none;dmarc=pass action=none header.from=nvidia.com; Received-SPF: Pass (protection.outlook.com: domain of nvidia.com designates 216.228.117.160 as permitted sender) receiver=protection.outlook.com; client-ip=216.228.117.160; helo=mail.nvidia.com; pr=C Received: from mail.nvidia.com (216.228.117.160) by CO1PEPF00012E83.mail.protection.outlook.com (10.167.249.58) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.21.25.13 via Frontend Transport; Fri, 15 May 2026 07:09:39 +0000 Received: from rnnvmail201.nvidia.com (10.129.68.8) by mail.nvidia.com (10.129.200.66) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.2562.20; Fri, 15 May 2026 00:08:31 -0700 Received: from mmaddireddy-ubuntu.nvidia.com (10.126.231.37) by rnnvmail201.nvidia.com (10.129.68.8) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.2562.20; Fri, 15 May 2026 00:08:24 -0700 From: Manikanta Maddireddy To: , , , , , , , , , , , , , , , , , , <18255117159@163.com> CC: , , , Manikanta Maddireddy Subject: [PATCH v3 2/2] arm64: tegra: fix aspm-l1-entry-delay-ns L1 latency cells Date: Fri, 15 May 2026 12:37:53 +0530 Message-ID: <20260515070753.3852840-3-mmaddireddy@nvidia.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20260515070753.3852840-1-mmaddireddy@nvidia.com> References: <20260515070753.3852840-1-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: 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: CO1PEPF00012E83:EE_|BN5PR12MB9510:EE_ X-MS-Office365-Filtering-Correlation-Id: 293468a8-de00-476c-0fb3-08deb250ee45 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|1800799024|7416014|36860700016|376014|82310400026|921020|22082099003|56012099003|11063799003|18002099003; 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X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: uTlaA/8293qCHfmH31lgZkNlb+G7wIluLbLqUloIojCKbQqUxhmy4PYedAnDCe3f54ycbrHCwlJRmnbIk3DCBHEtRXGKBEzSP2TFrV5G+pc5NyqJ/QLPKZbpS9+R+vnB/Bw+WK4bxaYuGX9xzdZw6nCaZJOJ9ilylF/vvuh5nR+wwSsmK3pfQtqSVq0NiwX93N+0CHaWpw3j3zMatELz4ggZHZq9AQDAY6kcnLpxPafMHGpyg0zaIWuIeS8Lqe/TEJ5W764vXkWDur69LzQyOdDFdOUIMHUqsfKkScWf5+LpTvK1TvZHNGbYCNdwWXtgdu8v/ujlWBgPzjs6mdT6g63gtsmGF9Xsg4DRjBK2tUf/+FYL/mYl0OQ28p2kW5qxIsgL9/hryvsrrEVD4dYXxjcj1VT0PS1g4Xx+zp9l8tEtQS1b5/GK/crUa5szZYxU X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 15 May 2026 07:09:39.6250 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 293468a8-de00-476c-0fb3-08deb250ee45 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: CO1PEPF00012E83.namprd03.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: BN5PR12MB9510 The Tegra194 PCIe driver converts aspm-l1-entry-delay-ns to whole ms with ceiling division, then derives the Synopsys DesignWare PORT_AFR L1 entrance latency encoding as min(order_base_2(us), 7). The nanosecond values from the Fixes tag below round up to 4, 8, and 16 us, selecting PORT_AFR L1 entrance latency codes 2, 3, and 4 respectively. Raise the programmed latency so the PORT_AFR codes are 3 / 4 / 5 (8 / 16 / 32 us buckets) instead of 2 / 3 / 4 (4 / 8 / 16 us). - tegra194.dtsi: 4000 -> 8000 ns (all listed controllers) - tegra234.dtsi: 8000 -> 16000 ns (Root Port), 16000 -> 32000 ns (Endpoint) Fixes: d60ed99f1c9e ("arm64: tegra: Add aspm-l1-entry-delay-ns to PCIe nodes") Signed-off-by: Manikanta Maddireddy --- arch/arm64/boot/dts/nvidia/tegra194.dtsi | 18 ++++++------- arch/arm64/boot/dts/nvidia/tegra234.dtsi | 32 ++++++++++++------------ 2 files changed, 25 insertions(+), 25 deletions(-) diff --git a/arch/arm64/boot/dts/nvidia/tegra194.dtsi b/arch/arm64/boot/dts/nvidia/tegra194.dtsi index 1d659454a6f9..7bbf0e892724 100644 --- a/arch/arm64/boot/dts/nvidia/tegra194.dtsi +++ b/arch/arm64/boot/dts/nvidia/tegra194.dtsi @@ -2382,7 +2382,7 @@ pcie@14100000 { nvidia,aspm-cmrt-us = <60>; nvidia,aspm-pwr-on-t-us = <20>; nvidia,aspm-l0s-entrance-latency-us = <3>; - aspm-l1-entry-delay-ns = <4000>; + aspm-l1-entry-delay-ns = <8000>; bus-range = <0x0 0xff>; @@ -2435,7 +2435,7 @@ pcie@14120000 { nvidia,aspm-cmrt-us = <60>; nvidia,aspm-pwr-on-t-us = <20>; nvidia,aspm-l0s-entrance-latency-us = <3>; - aspm-l1-entry-delay-ns = <4000>; + aspm-l1-entry-delay-ns = <8000>; bus-range = <0x0 0xff>; @@ -2488,7 +2488,7 @@ pcie@14140000 { nvidia,aspm-cmrt-us = <60>; nvidia,aspm-pwr-on-t-us = <20>; nvidia,aspm-l0s-entrance-latency-us = <3>; - aspm-l1-entry-delay-ns = <4000>; + aspm-l1-entry-delay-ns = <8000>; bus-range = <0x0 0xff>; @@ -2541,7 +2541,7 @@ pcie@14160000 { nvidia,aspm-cmrt-us = <60>; nvidia,aspm-pwr-on-t-us = <20>; nvidia,aspm-l0s-entrance-latency-us = <3>; - aspm-l1-entry-delay-ns = <4000>; + aspm-l1-entry-delay-ns = <8000>; bus-range = <0x0 0xff>; @@ -2587,7 +2587,7 @@ pcie-ep@14160000 { nvidia,aspm-cmrt-us = <60>; nvidia,aspm-pwr-on-t-us = <20>; nvidia,aspm-l0s-entrance-latency-us = <3>; - aspm-l1-entry-delay-ns = <4000>; + aspm-l1-entry-delay-ns = <8000>; interconnects = <&mc TEGRA194_MEMORY_CLIENT_PCIE4R &emc>, <&mc TEGRA194_MEMORY_CLIENT_PCIE4W &emc>; @@ -2634,7 +2634,7 @@ pcie@14180000 { nvidia,aspm-cmrt-us = <60>; nvidia,aspm-pwr-on-t-us = <20>; nvidia,aspm-l0s-entrance-latency-us = <3>; - aspm-l1-entry-delay-ns = <4000>; + aspm-l1-entry-delay-ns = <8000>; bus-range = <0x0 0xff>; @@ -2680,7 +2680,7 @@ pcie-ep@14180000 { nvidia,aspm-cmrt-us = <60>; nvidia,aspm-pwr-on-t-us = <20>; nvidia,aspm-l0s-entrance-latency-us = <3>; - aspm-l1-entry-delay-ns = <4000>; + aspm-l1-entry-delay-ns = <8000>; interconnects = <&mc TEGRA194_MEMORY_CLIENT_PCIE0R &emc>, <&mc TEGRA194_MEMORY_CLIENT_PCIE0W &emc>; @@ -2730,7 +2730,7 @@ pcie@141a0000 { nvidia,aspm-cmrt-us = <60>; nvidia,aspm-pwr-on-t-us = <20>; nvidia,aspm-l0s-entrance-latency-us = <3>; - aspm-l1-entry-delay-ns = <4000>; + aspm-l1-entry-delay-ns = <8000>; bus-range = <0x0 0xff>; @@ -2779,7 +2779,7 @@ pcie-ep@141a0000 { nvidia,aspm-cmrt-us = <60>; nvidia,aspm-pwr-on-t-us = <20>; nvidia,aspm-l0s-entrance-latency-us = <3>; - aspm-l1-entry-delay-ns = <4000>; + aspm-l1-entry-delay-ns = <8000>; interconnects = <&mc TEGRA194_MEMORY_CLIENT_PCIE5R &emc>, <&mc TEGRA194_MEMORY_CLIENT_PCIE5W &emc>; diff --git a/arch/arm64/boot/dts/nvidia/tegra234.dtsi b/arch/arm64/boot/dts/nvidia/tegra234.dtsi index 75bb9a0ad027..8e0c51e496e2 100644 --- a/arch/arm64/boot/dts/nvidia/tegra234.dtsi +++ b/arch/arm64/boot/dts/nvidia/tegra234.dtsi @@ -4532,7 +4532,7 @@ pcie@140a0000 { nvidia,aspm-cmrt-us = <60>; nvidia,aspm-pwr-on-t-us = <20>; nvidia,aspm-l0s-entrance-latency-us = <3>; - aspm-l1-entry-delay-ns = <8000>; + aspm-l1-entry-delay-ns = <16000>; bus-range = <0x0 0xff>; @@ -4587,7 +4587,7 @@ pcie@140c0000 { nvidia,aspm-cmrt-us = <60>; nvidia,aspm-pwr-on-t-us = <20>; nvidia,aspm-l0s-entrance-latency-us = <3>; - aspm-l1-entry-delay-ns = <8000>; + aspm-l1-entry-delay-ns = <16000>; bus-range = <0x0 0xff>; @@ -4642,7 +4642,7 @@ pcie@140e0000 { nvidia,aspm-cmrt-us = <60>; nvidia,aspm-pwr-on-t-us = <20>; nvidia,aspm-l0s-entrance-latency-us = <3>; - aspm-l1-entry-delay-ns = <8000>; + aspm-l1-entry-delay-ns = <16000>; bus-range = <0x0 0xff>; @@ -4689,7 +4689,7 @@ pcie-ep@140e0000 { nvidia,aspm-cmrt-us = <60>; nvidia,aspm-pwr-on-t-us = <20>; nvidia,aspm-l0s-entrance-latency-us = <3>; - aspm-l1-entry-delay-ns = <16000>; + aspm-l1-entry-delay-ns = <32000>; interconnects = <&mc TEGRA234_MEMORY_CLIENT_PCIE10AR &emc>, <&mc TEGRA234_MEMORY_CLIENT_PCIE10AW &emc>; @@ -4738,7 +4738,7 @@ pcie@14100000 { nvidia,aspm-cmrt-us = <60>; nvidia,aspm-pwr-on-t-us = <20>; nvidia,aspm-l0s-entrance-latency-us = <3>; - aspm-l1-entry-delay-ns = <8000>; + aspm-l1-entry-delay-ns = <16000>; bus-range = <0x0 0xff>; @@ -4793,7 +4793,7 @@ pcie@14120000 { nvidia,aspm-cmrt-us = <60>; nvidia,aspm-pwr-on-t-us = <20>; nvidia,aspm-l0s-entrance-latency-us = <3>; - aspm-l1-entry-delay-ns = <8000>; + aspm-l1-entry-delay-ns = <16000>; bus-range = <0x0 0xff>; @@ -4848,7 +4848,7 @@ pcie@14140000 { nvidia,aspm-cmrt-us = <60>; nvidia,aspm-pwr-on-t-us = <20>; nvidia,aspm-l0s-entrance-latency-us = <3>; - aspm-l1-entry-delay-ns = <8000>; + aspm-l1-entry-delay-ns = <16000>; bus-range = <0x0 0xff>; @@ -4903,7 +4903,7 @@ pcie@14160000 { nvidia,aspm-cmrt-us = <60>; nvidia,aspm-pwr-on-t-us = <20>; nvidia,aspm-l0s-entrance-latency-us = <3>; - aspm-l1-entry-delay-ns = <8000>; + aspm-l1-entry-delay-ns = <16000>; bus-range = <0x0 0xff>; @@ -4945,7 +4945,7 @@ pcie-ep@14160000 { nvidia,aspm-cmrt-us = <60>; nvidia,aspm-pwr-on-t-us = <20>; nvidia,aspm-l0s-entrance-latency-us = <3>; - aspm-l1-entry-delay-ns = <16000>; + aspm-l1-entry-delay-ns = <32000>; interconnects = <&mc TEGRA234_MEMORY_CLIENT_PCIE4R &emc>, <&mc TEGRA234_MEMORY_CLIENT_PCIE4W &emc>; @@ -4992,7 +4992,7 @@ pcie@14180000 { nvidia,aspm-cmrt-us = <60>; nvidia,aspm-pwr-on-t-us = <20>; nvidia,aspm-l0s-entrance-latency-us = <3>; - aspm-l1-entry-delay-ns = <8000>; + aspm-l1-entry-delay-ns = <16000>; bus-range = <0x0 0xff>; @@ -5047,7 +5047,7 @@ pcie@141a0000 { nvidia,aspm-cmrt-us = <60>; nvidia,aspm-pwr-on-t-us = <20>; nvidia,aspm-l0s-entrance-latency-us = <3>; - aspm-l1-entry-delay-ns = <8000>; + aspm-l1-entry-delay-ns = <16000>; bus-range = <0x0 0xff>; @@ -5094,7 +5094,7 @@ pcie-ep@141a0000 { nvidia,aspm-cmrt-us = <60>; nvidia,aspm-pwr-on-t-us = <20>; nvidia,aspm-l0s-entrance-latency-us = <3>; - aspm-l1-entry-delay-ns = <16000>; + aspm-l1-entry-delay-ns = <32000>; interconnects = <&mc TEGRA234_MEMORY_CLIENT_PCIE5R &emc>, <&mc TEGRA234_MEMORY_CLIENT_PCIE5W &emc>; @@ -5143,7 +5143,7 @@ pcie@141c0000 { nvidia,aspm-cmrt-us = <60>; nvidia,aspm-pwr-on-t-us = <20>; nvidia,aspm-l0s-entrance-latency-us = <3>; - aspm-l1-entry-delay-ns = <8000>; + aspm-l1-entry-delay-ns = <16000>; bus-range = <0x0 0xff>; @@ -5190,7 +5190,7 @@ pcie-ep@141c0000 { nvidia,aspm-cmrt-us = <60>; nvidia,aspm-pwr-on-t-us = <20>; nvidia,aspm-l0s-entrance-latency-us = <3>; - aspm-l1-entry-delay-ns = <16000>; + aspm-l1-entry-delay-ns = <32000>; interconnects = <&mc TEGRA234_MEMORY_CLIENT_PCIE6AR &emc>, <&mc TEGRA234_MEMORY_CLIENT_PCIE6AW &emc>; @@ -5239,7 +5239,7 @@ pcie@141e0000 { nvidia,aspm-cmrt-us = <60>; nvidia,aspm-pwr-on-t-us = <20>; nvidia,aspm-l0s-entrance-latency-us = <3>; - aspm-l1-entry-delay-ns = <8000>; + aspm-l1-entry-delay-ns = <16000>; bus-range = <0x0 0xff>; @@ -5286,7 +5286,7 @@ pcie-ep@141e0000 { nvidia,aspm-cmrt-us = <60>; nvidia,aspm-pwr-on-t-us = <20>; nvidia,aspm-l0s-entrance-latency-us = <3>; - aspm-l1-entry-delay-ns = <16000>; + aspm-l1-entry-delay-ns = <32000>; interconnects = <&mc TEGRA234_MEMORY_CLIENT_PCIE7AR &emc>, <&mc TEGRA234_MEMORY_CLIENT_PCIE7AW &emc>; -- 2.34.1