From patchwork Tue Mar 31 02:26:53 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Zhang Rui X-Patchwork-Id: 6127231 X-Patchwork-Delegate: rui.zhang@intel.com Return-Path: X-Original-To: patchwork-linux-pm@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork1.web.kernel.org (Postfix) with ESMTP id 9ED4E9F349 for ; Tue, 31 Mar 2015 02:28:42 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id B10EE20459 for ; Tue, 31 Mar 2015 02:28:41 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 9CC342045A for ; Tue, 31 Mar 2015 02:28:40 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753967AbbCaC2h (ORCPT ); Mon, 30 Mar 2015 22:28:37 -0400 Received: from mga01.intel.com ([192.55.52.88]:47360 "EHLO mga01.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753966AbbCaC2f (ORCPT ); Mon, 30 Mar 2015 22:28:35 -0400 Received: from orsmga003.jf.intel.com ([10.7.209.27]) by fmsmga101.fm.intel.com with ESMTP; 30 Mar 2015 19:28:35 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.11,498,1422950400"; d="scan'208";a="548691569" Received: from aaronlu.sh.intel.com ([10.239.159.58]) by orsmga003.jf.intel.com with ESMTP; 30 Mar 2015 19:28:34 -0700 From: Zhang Rui To: linux-pm@vger.kernel.org Subject: [PATCH V3 1/3] Thermal: initialize thermal zone device correctly Date: Tue, 31 Mar 2015 10:26:53 +0800 Message-Id: <1427768815-20948-2-git-send-email-rui.zhang@intel.com> X-Mailer: git-send-email 2.1.0 In-Reply-To: <1427768815-20948-1-git-send-email-rui.zhang@intel.com> References: <1427768815-20948-1-git-send-email-rui.zhang@intel.com> Sender: linux-pm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org X-Spam-Status: No, score=-6.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, T_RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP After thermal zone device registered, as we have not read any temperature before, thus tz->temperature should not be 0, which actually means 0C, and thermal trend is not available. In this case, we need specially handling for the first thermal_zone_device_update(). Both thermal core framework and step_wise governor is enhanced to handle this. CC: #3.18+ Tested-by: Manuel Krause Tested-by: szegad Tested-by: prash Tested-by: amish Tested-by: Matthias Signed-off-by: Zhang Rui --- drivers/thermal/step_wise.c | 15 +++++++++++++-- drivers/thermal/thermal_core.c | 19 +++++++++++++++++-- drivers/thermal/thermal_core.h | 1 + include/linux/thermal.h | 3 +++ 4 files changed, 34 insertions(+), 4 deletions(-) diff --git a/drivers/thermal/step_wise.c b/drivers/thermal/step_wise.c index 5a0f12d..c2bb37c 100644 --- a/drivers/thermal/step_wise.c +++ b/drivers/thermal/step_wise.c @@ -63,6 +63,16 @@ static unsigned long get_target_state(struct thermal_instance *instance, next_target = instance->target; dev_dbg(&cdev->device, "cur_state=%ld\n", cur_state); + if (!instance->initialized) { + if (throttle) { + next_target = (cur_state + 1) >= instance->upper ? + instance->upper : + ((cur_state + 1) < instance->lower ? + instance->lower : (cur_state + 1)); + } else + next_target = THERMAL_NO_TARGET; + } + switch (trend) { case THERMAL_TREND_RAISING: if (throttle) { @@ -149,7 +159,8 @@ static void thermal_zone_trip_update(struct thermal_zone_device *tz, int trip) dev_dbg(&instance->cdev->device, "old_target=%d, target=%d\n", old_target, (int)instance->target); - if (old_target == instance->target) + if (instance->initialized && + old_target == instance->target) continue; /* Activate a passive thermal instance */ @@ -161,7 +172,7 @@ static void thermal_zone_trip_update(struct thermal_zone_device *tz, int trip) instance->target == THERMAL_NO_TARGET) update_passive_instance(tz, trip_type, -1); - + instance->initialized = true; instance->cdev->updated = false; /* cdev needs update */ } diff --git a/drivers/thermal/thermal_core.c b/drivers/thermal/thermal_core.c index 174d3bc..9d6f71b 100644 --- a/drivers/thermal/thermal_core.c +++ b/drivers/thermal/thermal_core.c @@ -469,8 +469,22 @@ static void update_temperature(struct thermal_zone_device *tz) mutex_unlock(&tz->lock); trace_thermal_temperature(tz); - dev_dbg(&tz->device, "last_temperature=%d, current_temperature=%d\n", - tz->last_temperature, tz->temperature); + if (tz->last_temperature == THERMAL_TEMP_INVALID) + dev_dbg(&tz->device, "last_temperature N/A, current_temperature=%d\n", + tz->temperature); + else + dev_dbg(&tz->device, "last_temperature=%d, current_temperature=%d\n", + tz->last_temperature, tz->temperature); +} + +static void thermal_zone_device_reset(struct thermal_zone_device *tz) +{ + struct thermal_instance *pos; + + tz->temperature = THERMAL_TEMP_INVALID; + tz->passive = 0; + list_for_each_entry(pos, &tz->thermal_instances, tz_node) + pos->initialized = false; } void thermal_zone_device_update(struct thermal_zone_device *tz) @@ -1574,6 +1588,7 @@ struct thermal_zone_device *thermal_zone_device_register(const char *type, if (!tz->ops->get_temp) thermal_zone_device_set_polling(tz, 0); + thermal_zone_device_reset(tz); thermal_zone_device_update(tz); return tz; diff --git a/drivers/thermal/thermal_core.h b/drivers/thermal/thermal_core.h index 0531c75..6d9ffa5 100644 --- a/drivers/thermal/thermal_core.h +++ b/drivers/thermal/thermal_core.h @@ -41,6 +41,7 @@ struct thermal_instance { struct thermal_zone_device *tz; struct thermal_cooling_device *cdev; int trip; + bool initialized; unsigned long upper; /* Highest cooling state for this trip point */ unsigned long lower; /* Lowest cooling state for this trip point */ unsigned long target; /* expected cooling state */ diff --git a/include/linux/thermal.h b/include/linux/thermal.h index 5eac316..8650b0b 100644 --- a/include/linux/thermal.h +++ b/include/linux/thermal.h @@ -40,6 +40,9 @@ /* No upper/lower limit requirement */ #define THERMAL_NO_LIMIT ((u32)~0) +/* Invalid/uninitialized temperature */ +#define THERMAL_TEMP_INVALID -27400 + /* Unit conversion macros */ #define KELVIN_TO_CELSIUS(t) (long)(((long)t-2732 >= 0) ? \ ((long)t-2732+5)/10 : ((long)t-2732-5)/10)