From patchwork Thu May 19 14:35:08 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Zhang, Rui" X-Patchwork-Id: 574438 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 0D8BCC4332F for ; Thu, 19 May 2022 14:35:06 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231470AbiESOfF (ORCPT ); Thu, 19 May 2022 10:35:05 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:45796 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S239838AbiESOfD (ORCPT ); Thu, 19 May 2022 10:35:03 -0400 Received: from mga02.intel.com (mga02.intel.com [134.134.136.20]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 9BCD9BA54F for ; Thu, 19 May 2022 07:35:02 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1652970902; x=1684506902; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=WMMQI6LaG8XnQdWUmuMOfgF6HNdtWI8KYOOxX5jpl9E=; b=nFCg8hU+RIAuuCNQqLPmOL2zQmSjkT7U/PQXYrJ1muqV39tiI12muFeD 7w+XOMUTkiLdE63tnxqyGwuH+/AlnMrAFbxTZylPCRaEsViA8wsS73TpS APkQyr6FgkHsUYUpIaguhd77CsGeYc5HC9TupjT2YC4lAWlhMzkbggguC 7kgFn5/n25DLqpp9UaTQi5FaFEtPvWV0YOwodDd8cn1zBjrUhryUvAHNH Q6HlsJmRjZjXJrjgIytmJ+fPBGdlkNo0XQQPYt1FSkN4UM04xgoLyx4bO a/REQXprQsFK1ZL9psYiLUs4TGvoWpL0rLybCM18Q71Bcg1+p1yVA1bMk g==; X-IronPort-AV: E=McAfee;i="6400,9594,10352"; a="259804233" X-IronPort-AV: E=Sophos;i="5.91,237,1647327600"; d="scan'208";a="259804233" Received: from orsmga007.jf.intel.com ([10.7.209.58]) by orsmga101.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 19 May 2022 07:35:02 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.91,237,1647327600"; d="scan'208";a="570244580" Received: from rzhang1-dev.sh.intel.com ([10.239.48.43]) by orsmga007.jf.intel.com with ESMTP; 19 May 2022 07:35:00 -0700 From: Zhang Rui To: rjw@rjwysocki.net Cc: linux-pm@vger.kernel.org, daniel.lezcano@linaro.org, sumeet.r.pawnikar@intel.com, len.brown@intel.com Subject: [PATCH V2 4/4] thermal: intel: pch: improve the cooling delay log Date: Thu, 19 May 2022 22:35:08 +0800 Message-Id: <20220519143508.3803894-5-rui.zhang@intel.com> X-Mailer: git-send-email 2.27.0 In-Reply-To: <20220519143508.3803894-1-rui.zhang@intel.com> References: <20220519143508.3803894-1-rui.zhang@intel.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org Previously, during suspend, intel_pch_thermal driver logs for every cooling iteration, about the current PCH temperature and number of cooling iterations that have been tried, like below [ 100.955526] intel_pch_thermal 0000:00:14.2: CPU-PCH current temp [53C] higher than the threshold temp [50C], sleep 1 times for 100 ms duration [ 101.064156] intel_pch_thermal 0000:00:14.2: CPU-PCH current temp [53C] higher than the threshold temp [50C], sleep 2 times for 100 ms duration After changing the default delay_cnt to 600, in practice, it is common to see tens of the above messages if the system is suspended when PCH overheats. Thus, change this log message from dev_warn to dev_dbg because it is only useful when we want to check the temperature trend. At the same time, there is always a one-line message given by the driver with the patch applied, with below four possibilities. 1. PCH is cool, no cooling delay needed [ 1791.902853] intel_pch_thermal 0000:00:12.0: CPU-PCH is cool [48C] 2. PCH overheats and becomes cool after the cooling delays [ 1475.511617] intel_pch_thermal 0000:00:12.0: CPU-PCH is cool [49C] after 30700 ms delay 3. PCH still overheats after the overall cooling timeout [ 2250.157487] intel_pch_thermal 0000:00:12.0: CPU-PCH is hot [60C] after 60000 ms delay. S0ix might fail 4. PCH aborts cooling because of wakeup event detected during the delay [ 1933.639509] intel_pch_thermal 0000:00:12.0: Wakeup event detected, abort cooling Signed-off-by: Zhang Rui Tested-by: Sumeet Pawnikar --- drivers/thermal/intel/intel_pch_thermal.c | 31 +++++++++++++++-------- 1 file changed, 20 insertions(+), 11 deletions(-) diff --git a/drivers/thermal/intel/intel_pch_thermal.c b/drivers/thermal/intel/intel_pch_thermal.c index b7b32e2f5ae2..c1fa2b29b153 100644 --- a/drivers/thermal/intel/intel_pch_thermal.c +++ b/drivers/thermal/intel/intel_pch_thermal.c @@ -197,7 +197,7 @@ static int pch_wpt_get_temp(struct pch_thermal_device *ptd, int *temp) static int pch_wpt_suspend(struct pch_thermal_device *ptd) { u8 tsel; - int pch_delay_cnt = 1; + int pch_delay_cnt = 0; u16 pch_thr_temp, pch_cur_temp; /* Shutdown the thermal sensor if it is not enabled by BIOS */ @@ -233,29 +233,38 @@ static int pch_wpt_suspend(struct pch_thermal_device *ptd) * temperature stays above threshold, notify the warning message * which helps to indentify the reason why S0ix entry was rejected. */ - while (pch_delay_cnt <= delay_cnt) { + while (pch_delay_cnt < delay_cnt) { if (pch_cur_temp < pch_thr_temp) break; - if (pm_wakeup_pending()) - break; + if (pm_wakeup_pending()) { + dev_warn(&ptd->pdev->dev, "Wakeup event detected, abort cooling\n"); + return 0; + } - dev_warn(&ptd->pdev->dev, + pch_delay_cnt++; + dev_dbg(&ptd->pdev->dev, "CPU-PCH current temp [%dC] higher than the threshold temp [%dC], sleep %d times for %d ms duration\n", pch_cur_temp, pch_thr_temp, pch_delay_cnt, delay_timeout); msleep(delay_timeout); /* Read the PCH current temperature for next cycle. */ pch_cur_temp = GET_PCH_TEMP(WPT_TEMP_TSR & readw(ptd->hw_base + WPT_TEMP)); - pch_delay_cnt++; } if (pch_cur_temp >= pch_thr_temp) dev_warn(&ptd->pdev->dev, - "CPU-PCH is hot [%dC] even after delay, continue to suspend. S0ix might fail\n", - pch_cur_temp); - else - dev_info(&ptd->pdev->dev, - "CPU-PCH is cool [%dC], continue to suspend\n", pch_cur_temp); + "CPU-PCH is hot [%dC] after %d ms delay. S0ix might fail\n", + pch_cur_temp, pch_delay_cnt * delay_timeout); + else { + if (pch_delay_cnt) + dev_info(&ptd->pdev->dev, + "CPU-PCH is cool [%dC] after %d ms delay\n", + pch_cur_temp, pch_delay_cnt * delay_timeout); + else + dev_info(&ptd->pdev->dev, + "CPU-PCH is cool [%dC]\n", + pch_cur_temp); + } return 0; }