From patchwork Mon Dec 21 13:52:02 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Kai-Heng Feng X-Patchwork-Id: 346527 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.7 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, URIBL_BLOCKED, USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id A2572C433E0 for ; Mon, 21 Dec 2020 13:53:23 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 738652222A for ; Mon, 21 Dec 2020 13:53:23 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1725891AbgLUNxG (ORCPT ); Mon, 21 Dec 2020 08:53:06 -0500 Received: from youngberry.canonical.com ([91.189.89.112]:56938 "EHLO youngberry.canonical.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725807AbgLUNxG (ORCPT ); Mon, 21 Dec 2020 08:53:06 -0500 Received: from 36-229-229-222.dynamic-ip.hinet.net ([36.229.229.222] helo=localhost) by youngberry.canonical.com with esmtpsa (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.86_2) (envelope-from ) id 1krLbg-0004uF-LU; Mon, 21 Dec 2020 13:52:13 +0000 From: Kai-Heng Feng To: rui.zhang@intel.com, daniel.lezcano@linaro.org, amitk@kernel.org Cc: andrzej.p@collabora.com, mjg59@google.com, srinivas.pandruvada@linux.intel.com, Kai-Heng Feng , Bartlomiej Zolnierkiewicz , Peter Kaestle , Gayatri Kammela , Akinobu Mita , Andy Shevchenko , Andrew Morton , linux-pm@vger.kernel.org (open list:THERMAL), linux-kernel@vger.kernel.org (open list) Subject: [PATCH 1/2] thermal: int340x: Add critical callback to override default shutdown behavior Date: Mon, 21 Dec 2020 21:52:02 +0800 Message-Id: <20201221135206.17671-1-kai.heng.feng@canonical.com> X-Mailer: git-send-email 2.29.2 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org We are seeing thermal shutdown on Intel based mobile workstations, the shutdown happens during the first trip handle in thermal_zone_device_register(): kernel: thermal thermal_zone15: critical temperature reached (101 C), shutting down However, we shouldn't do a thermal shutdown here, since 1) We may want to use a dedicated daemon, Intel's thermald in this case, to handle thermal shutdown. 2) For ACPI based system, _CRT doesn't mean shutdown unless it's inside ThermalZone namespace. ACPI Spec, 11.4.4 _CRT (Critical Temperature): "... If this object it present under a device, the device’s driver evaluates this object to determine the device’s critical cooling temperature trip point. This value may then be used by the device’s driver to program an internal device temperature sensor trip point." So a "critical trip" here merely means we should take a more aggressive cooling method. As int340x device isn't present under ACPI ThermalZone, override the default .critical callback to prevent surprising thermal shutdown. Signed-off-by: Kai-Heng Feng --- drivers/thermal/intel/int340x_thermal/int3400_thermal.c | 6 ++++++ .../thermal/intel/int340x_thermal/int340x_thermal_zone.c | 6 ++++++ 2 files changed, 12 insertions(+) diff --git a/drivers/thermal/intel/int340x_thermal/int3400_thermal.c b/drivers/thermal/intel/int340x_thermal/int3400_thermal.c index 823354a1a91a..9778a6dba939 100644 --- a/drivers/thermal/intel/int340x_thermal/int3400_thermal.c +++ b/drivers/thermal/intel/int340x_thermal/int3400_thermal.c @@ -431,9 +431,15 @@ static int int3400_thermal_change_mode(struct thermal_zone_device *thermal, return result; } +static void int3400_thermal_critical(struct thermal_zone_device *thermal) +{ + dev_dbg(&thermal->device, "%s: critical temperature reached\n", thermal->type); +} + static struct thermal_zone_device_ops int3400_thermal_ops = { .get_temp = int3400_thermal_get_temp, .change_mode = int3400_thermal_change_mode, + .critical = int3400_thermal_critical, }; static struct thermal_zone_params int3400_thermal_params = { diff --git a/drivers/thermal/intel/int340x_thermal/int340x_thermal_zone.c b/drivers/thermal/intel/int340x_thermal/int340x_thermal_zone.c index 6e479deff76b..d1248ba943a4 100644 --- a/drivers/thermal/intel/int340x_thermal/int340x_thermal_zone.c +++ b/drivers/thermal/intel/int340x_thermal/int340x_thermal_zone.c @@ -146,12 +146,18 @@ static int int340x_thermal_get_trip_hyst(struct thermal_zone_device *zone, return 0; } +static void int340x_thermal_critical(struct thermal_zone_device *zone) +{ + dev_dbg(&zone->device, "%s: critical temperature reached\n", zone->type); +} + static struct thermal_zone_device_ops int340x_thermal_zone_ops = { .get_temp = int340x_thermal_get_zone_temp, .get_trip_temp = int340x_thermal_get_trip_temp, .get_trip_type = int340x_thermal_get_trip_type, .set_trip_temp = int340x_thermal_set_trip_temp, .get_trip_hyst = int340x_thermal_get_trip_hyst, + .critical = int340x_thermal_critical, }; static int int340x_thermal_get_trip_config(acpi_handle handle, char *name,