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Mon, 9 Oct 2023 10:18:46 -0700 Received: from rnnvmail202.nvidia.com (10.129.68.7) by rnnvmail205.nvidia.com (10.129.68.10) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.986.41; Mon, 9 Oct 2023 10:18:46 -0700 Received: from sumitg-l4t.nvidia.com (10.127.8.10) by mail.nvidia.com (10.129.68.7) with Microsoft SMTP Server id 15.2.986.41 via Frontend Transport; Mon, 9 Oct 2023 10:18:42 -0700 From: Sumit Gupta To: , , , , , CC: , , , , , , , Subject: [Patch v4 0/2] Add support for _TFP and change throttle pctg Date: Mon, 9 Oct 2023 22:48:37 +0530 Message-ID: <20231009171839.12267-1-sumitg@nvidia.com> X-Mailer: git-send-email 2.17.1 X-NVConfidentiality: public MIME-Version: 1.0 X-NV-OnPremToCloud: ExternallySecured X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: CY4PEPF0000E9D0:EE_|SN7PR12MB6766:EE_ X-MS-Office365-Filtering-Correlation-Id: 8fbb2967-7262-43a3-2d09-08dbc8ebd4f0 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; 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X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 09 Oct 2023 17:19:01.7030 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 8fbb2967-7262-43a3-2d09-08dbc8ebd4f0 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: CY4PEPF0000E9D0.namprd03.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: SN7PR12MB6766 X-Spam-Status: No, score=-1.1 required=5.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,FORGED_SPF_HELO, RCVD_IN_DNSWL_NONE,RCVD_IN_MSPIKE_H2,SPF_HELO_PASS,SPF_NONE autolearn=no autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-tegra@vger.kernel.org This patch set adds two improvements to get a finer control over the impact of thermal throttling on performance. 1) Patch 1: Adds support to read "Thermal fast Sampling Period (_TFP)" ACPI object and use it over "Thermal Sampling Period (_TSP)" for Passive cooling if both are present. 2) Patch 2: Adds support to reduce the CPUFREQ reduction percentage and not always cause throttling in steps of "20%" for Tegra241 SoC. Both patches can be applied independently. --- v3[3] -> 4: - Patch 2: move ARM code from generic to new file 'thermal_cpufreq.c'. : get 'cpufreq_thermal_pctg' value for Tegra241 from new file. : move dummy/null function to 'acpi.h'. v2[2] -> v3: - Patch1: rebased on top of linux-next. - Patch2: use __read_mostly for the cpufreq_thermal_* variables. : add static to new function acpi_thermal_cpufreq_config_nvidia. : add null function if CONFIG_HAVE_ARM_SMCCC_DISCOVERY undefined : removed redundant parenthesis. v1[1] -> v2: - Patch1: add ACPI spec section info in commit description and rebased. - Patch2: add info about hardware in the commit description. : switched CPUFREQ THERMAL tuning macros to static variables. : update the tunings for Tegra241 SoC only using soc_id check. Jeff Brasen (1): ACPI: thermal: Add Thermal fast Sampling Period (_TFP) support Srikar Srimath Tirumala (1): ACPI: processor: reduce CPUFREQ thermal reduction pctg for Tegra241 drivers/acpi/arm64/Makefile | 1 + drivers/acpi/arm64/thermal_cpufreq.c | 20 ++++++++++++++++ drivers/acpi/processor_thermal.c | 35 +++++++++++++++++++++++++--- drivers/acpi/thermal.c | 17 +++++++++----- include/linux/acpi.h | 9 +++++++ 5 files changed, 73 insertions(+), 9 deletions(-) create mode 100644 drivers/acpi/arm64/thermal_cpufreq.c [3] https://lore.kernel.org/linux-acpi/20231006153612.5851-1-sumitg@nvidia.com/ [2] https://lore.kernel.org/lkml/20230913164659.9345-1-sumitg@nvidia.com/ [1] https://lore.kernel.org/lkml/20230817093011.1378-1-sumitg@nvidia.com/