Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::3:3 as permitted sender) client-ip=2620:137:e000::3:3;
Received-SPF: Pass (protection.outlook.com: domain of nvidia.com designates
 216.228.117.161 as permitted sender) receiver=protection.outlook.com;
 client-ip=216.228.117.161; helo=mail.nvidia.com; pr=C
Message-ID: <7b4f8911-90ef-8419-78dc-c2bffe9b9a3f@nvidia.com>
Date:   Wed, 22 Nov 2023 18:25:10 +0530
MIME-Version: 1.0
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101
 Thunderbird/102.11.0
Subject: Re: [Patch v6 1/2] ACPI: thermal: Add Thermal fast Sampling Period
 (_TFP) support
To:     "Rafael J. Wysocki" <rafael@kernel.org>
CC:     <rui.zhang@intel.com>, <lenb@kernel.org>, <lpieralisi@kernel.org>,
        <guohanjun@huawei.com>, <sudeep.holla@arm.com>,
        <linux-acpi@vger.kernel.org>, <linux-tegra@vger.kernel.org>,
        <linux-kernel@vger.kernel.org>,
        <linux-arm-kernel@lists.infradead.org>, <treding@nvidia.com>,
        <jonathanh@nvidia.com>, <bbasu@nvidia.com>, <sanjayc@nvidia.com>,
        <ksitaraman@nvidia.com>, <srikars@nvidia.com>,
        <jbrasen@nvidia.com>, "Sumit Gupta" <sumitg@nvidia.com>
References: <20231109183322.28039-1-sumitg@nvidia.com>
 <20231109183322.28039-2-sumitg@nvidia.com>
 <CAJZ5v0jEXYP-V93XJ02cZ8UbMwKei2E27Sc0He0WnKvNXpUECg@mail.gmail.com>
Content-Language: en-US
From:   Sumit Gupta <sumitg@nvidia.com>
In-Reply-To: <CAJZ5v0jEXYP-V93XJ02cZ8UbMwKei2E27Sc0He0WnKvNXpUECg@mail.gmail.com>
Content-Type: text/plain; charset="UTF-8"; format=flowed
Content-Transfer-Encoding: 8bit
X-MS-Exchange-CrossTenant-OriginalArrivalTime: 22 Nov 2023 12:55:31.4986
 (UTC)
X-MS-Exchange-CrossTenant-Network-Message-Id: 1284d936-787c-4e02-9728-08dbeb5a4f86
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: MN1PEPF0000ECD4.namprd02.prod.outlook.com
X-MS-Exchange-CrossTenant-AuthAs: Anonymous
X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem
X-MS-Exchange-Transport-CrossTenantHeadersStamped: MW4PR12MB6682
X-Spam-Status: No, score=-2.6 required=5.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED,
	DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,
	MAILING_LIST_MULTI,NICE_REPLY_A,SPF_HELO_NONE,SPF_PASS,
	T_SCC_BODY_TEXT_LINE autolearn=unavailable autolearn_force=no
	version=3.4.6
X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lipwig.vger.email
Precedence: bulk
List-ID: <linux-kernel.vger.kernel.org>
X-Mailing-List: linux-kernel@vger.kernel.org
X-Greylist: Sender passed SPF test, not delayed by milter-greylist-4.6.4 (lipwig.vger.email [0.0.0.0]); Wed, 22 Nov 2023 05:13:03 -0800 (PST)


On 22/11/23 01:29, Rafael J. Wysocki wrote:
> External email: Use caution opening links or attachments
> 
> 
> On Thu, Nov 9, 2023 at 7:34 PM Sumit Gupta <sumitg@nvidia.com> wrote:
>>
>> From: Jeff Brasen <jbrasen@nvidia.com>
>>
>> Add support of "Thermal fast Sampling Period (_TFP)" for Passive cooling.
>> As per [1], _TFP overrides the "Thermal Sampling Period (_TSP)" if both
>> are present in a Thermal zone.
>>
>> [1] ACPI Specification 6.4 - section 11.4.17. _TFP (Thermal fast Sampling
>>      Period)"
>>
>> Signed-off-by: Jeff Brasen <jbrasen@nvidia.com>
>> Co-developed-by: Sumit Gupta <sumitg@nvidia.com>
>> Signed-off-by: Sumit Gupta <sumitg@nvidia.com>
>> ---
>>   drivers/acpi/thermal.c | 12 +++++++++---
>>   1 file changed, 9 insertions(+), 3 deletions(-)
>>
>> diff --git a/drivers/acpi/thermal.c b/drivers/acpi/thermal.c
>> index f74d81abdbfc..3b75eb2260d7 100644
>> --- a/drivers/acpi/thermal.c
>> +++ b/drivers/acpi/thermal.c
>> @@ -90,7 +90,7 @@ struct acpi_thermal_passive {
>>          struct acpi_thermal_trip trip;
>>          unsigned long tc1;
>>          unsigned long tc2;
>> -       unsigned long tsp;
>> +       unsigned long delay;
>>   };
>>
>>   struct acpi_thermal_active {
>> @@ -404,11 +404,17 @@ static bool passive_trip_params_init(struct acpi_thermal *tz)
>>
>>          tz->trips.passive.tc2 = tmp;
>>
>> +       status = acpi_evaluate_integer(tz->device->handle, "_TFP", NULL, &tmp);
>> +       if (ACPI_SUCCESS(status)) {
>> +               tz->trips.passive.delay = tmp;
>> +               return true;
>> +       }
>> +
>>          status = acpi_evaluate_integer(tz->device->handle, "_TSP", NULL, &tmp);
>>          if (ACPI_FAILURE(status))
>>                  return false;
>>
>> -       tz->trips.passive.tsp = tmp;
>> +       tz->trips.passive.delay = tmp * 100;
>>
>>          return true;
>>   }
>> @@ -904,7 +910,7 @@ static int acpi_thermal_add(struct acpi_device *device)
>>
>>          acpi_trip = &tz->trips.passive.trip;
>>          if (acpi_thermal_trip_valid(acpi_trip)) {
>> -               passive_delay = tz->trips.passive.tsp * 100;
>> +               passive_delay = tz->trips.passive.delay;
>>
>>                  trip->type = THERMAL_TRIP_PASSIVE;
>>                  trip->temperature = acpi_thermal_temp(tz, acpi_trip->temp_dk);
>> --
> 
> So does the second patch in the series really depend on this one?
> 
> If not, I can apply it I think.

Yes, this patch can be applied independently. Thank you!

Best Regards,
Sumit Gupta