From patchwork Thu Nov 22 07:52:32 2012 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Zhang, Rui" X-Patchwork-Id: 1786101 X-Patchwork-Delegate: rui.zhang@intel.com Return-Path: X-Original-To: patchwork-linux-pm@patchwork.kernel.org Delivered-To: patchwork-process-083081@patchwork2.kernel.org Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by patchwork2.kernel.org (Postfix) with ESMTP id 860DBDF24C for ; Thu, 22 Nov 2012 19:18:48 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756110Ab2KVTSd (ORCPT ); Thu, 22 Nov 2012 14:18:33 -0500 Received: from mga01.intel.com ([192.55.52.88]:30911 "EHLO mga01.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756698Ab2KVTSb (ORCPT ); Thu, 22 Nov 2012 14:18:31 -0500 Received: from fmsmga001.fm.intel.com ([10.253.24.23]) by fmsmga101.fm.intel.com with ESMTP; 21 Nov 2012 23:52:35 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.83,298,1352102400"; d="scan'208,223";a="250944952" Received: from unknown (HELO [10.255.21.138]) ([10.255.21.138]) by fmsmga001.fm.intel.com with ESMTP; 21 Nov 2012 23:52:33 -0800 Message-ID: <1353570752.2297.5.camel@rzhang1-mobl4> Subject: [PATCH V2 2/3] Introduce THERMAL_TREND_RAISE/DROP_FULL support for step_wise governor From: Zhang Rui To: Linux PM list Cc: Amit Kachhap , durga , "Zhang, Rui" Date: Thu, 22 Nov 2012 15:52:32 +0800 X-Mailer: Evolution 3.2.3-0ubuntu6 Mime-Version: 1.0 Sender: linux-pm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org From ac2224a47b88ca64f4ae25da78fb032b31856624 Mon Sep 17 00:00:00 2001 From: Zhang Rui Date: Mon, 19 Nov 2012 16:10:20 +0800 Subject: [PATCH 2/3] Introduce THERMAL_TREND_RAISE/DROP_FULL support for step_wise governor step_wise governor should set the device cooling state to upper/lower limit directly when THERMAL_TREND_RAISE/DROP_FULL. Signed-off-by: Zhang Rui --- drivers/thermal/step_wise.c | 64 +++++++++++++++++++++++++++++++------------ 1 file changed, 46 insertions(+), 18 deletions(-) diff --git a/drivers/thermal/step_wise.c b/drivers/thermal/step_wise.c index 1242cff..c3a0e87 100644 --- a/drivers/thermal/step_wise.c +++ b/drivers/thermal/step_wise.c @@ -35,21 +35,54 @@ * state for this trip point * b. if the trend is THERMAL_TREND_DROPPING, use lower cooling * state for this trip point + * c. if the trend is THERMAL_TREND_RAISE_FULL, use upper limit + * for this trip point + * d. if the trend is THERMAL_TREND_DROP_FULL, use lower limit + * for this trip point + * If the temperature is lower than a trip point, + * a. if the trend is THERMAL_TREND_RAISING, do nothing + * b. if the trend is THERMAL_TREND_DROPPING, use lower cooling + * state for this trip point, if the cooling state already + * equals lower limit, deactivate the thermal instance + * c. if the trend is THERMAL_TREND_RAISE_FULL, do nothing + * d. if the trend is THERMAL_TREND_DROP_FULL, use lower limit, + * if the cooling state already equals lower limit, + * deactive the thermal instance */ static unsigned long get_target_state(struct thermal_instance *instance, - enum thermal_trend trend) + enum thermal_trend trend, bool throttle) { struct thermal_cooling_device *cdev = instance->cdev; unsigned long cur_state; cdev->ops->get_cur_state(cdev, &cur_state); - if (trend == THERMAL_TREND_RAISING) { - cur_state = cur_state < instance->upper ? - (cur_state + 1) : instance->upper; - } else if (trend == THERMAL_TREND_DROPPING) { - cur_state = cur_state > instance->lower ? - (cur_state - 1) : instance->lower; + switch (trend) { + case THERMAL_TREND_RAISING: + if (throttle) + cur_state = cur_state < instance->upper ? + (cur_state + 1) : instance->upper; + break; + case THERMAL_TREND_RAISE_FULL: + if (throttle) + cur_state = instance->upper; + break; + case THERMAL_TREND_DROPPING: + if (cur_state == instance->lower) { + if (!throttle) + cur_state = -1; + } else + cur_state -= 1; + break; + case THERMAL_TREND_DROP_FULL: + if (cur_state == instance->lower) { + if (!throttle) + cur_state = -1; + } else + cur_state = instance->lower; + break; + default: + break; } return cur_state; @@ -76,7 +109,7 @@ static void update_instance_for_throttle(struct thermal_zone_device *tz, if (instance->trip != trip) continue; - instance->target = get_target_state(instance, trend); + instance->target = get_target_state(instance, trend, true); /* Activate a passive thermal instance */ if (instance->target == THERMAL_NO_TARGET) @@ -87,28 +120,23 @@ static void update_instance_for_throttle(struct thermal_zone_device *tz, } static void update_instance_for_dethrottle(struct thermal_zone_device *tz, - int trip, enum thermal_trip_type trip_type) + int trip, enum thermal_trip_type trip_type, + enum thermal_trend trend) { struct thermal_instance *instance; - struct thermal_cooling_device *cdev; - unsigned long cur_state; list_for_each_entry(instance, &tz->thermal_instances, tz_node) { if (instance->trip != trip || instance->target == THERMAL_NO_TARGET) continue; - cdev = instance->cdev; - cdev->ops->get_cur_state(cdev, &cur_state); - - instance->target = cur_state > instance->lower ? - (cur_state - 1) : THERMAL_NO_TARGET; + instance->target = get_target_state(instance, trend, false); /* Deactivate a passive thermal instance */ if (instance->target == THERMAL_NO_TARGET) update_passive_instance(tz, trip_type, -1); - cdev->updated = false; /* cdev needs update */ + instance->cdev->updated = false; /* cdev needs update */ } } @@ -133,7 +161,7 @@ static void thermal_zone_trip_update(struct thermal_zone_device *tz, int trip) if (tz->temperature >= trip_temp) update_instance_for_throttle(tz, trip, trip_type, trend); else - update_instance_for_dethrottle(tz, trip, trip_type); + update_instance_for_dethrottle(tz, trip, trip_type, trend); mutex_unlock(&tz->lock); }