From patchwork Fri Apr 8 04:59:05 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: =?utf-8?b?UmV4LUJDIENoZW4gKOmZs+afj+i+sCk=?= X-Patchwork-Id: 559097 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 45BDCC433FE for ; Fri, 8 Apr 2022 04:59:46 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234467AbiDHFBp (ORCPT ); Fri, 8 Apr 2022 01:01:45 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:38986 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234458AbiDHFBa (ORCPT ); Fri, 8 Apr 2022 01:01:30 -0400 Received: from mailgw01.mediatek.com (unknown [60.244.123.138]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 45B1619FF46; Thu, 7 Apr 2022 21:59:26 -0700 (PDT) X-UUID: 645d9c9094cb46778f217604269a5ad0-20220408 X-UUID: 645d9c9094cb46778f217604269a5ad0-20220408 Received: from mtkexhb02.mediatek.inc [(172.21.101.103)] by mailgw01.mediatek.com (envelope-from ) (Generic MTA with TLSv1.2 ECDHE-RSA-AES256-SHA384 256/256) with ESMTP id 1923159763; Fri, 08 Apr 2022 12:59:13 +0800 Received: from mtkcas11.mediatek.inc (172.21.101.40) by mtkmbs10n1.mediatek.inc (172.21.101.34) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384) id 15.2.792.15; Fri, 8 Apr 2022 12:59:12 +0800 Received: from mtksdccf07.mediatek.inc (172.21.84.99) by mtkcas11.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.0.1497.2 via Frontend Transport; Fri, 8 Apr 2022 12:59:12 +0800 From: Rex-BC Chen To: , , , CC: , , , , , , , , , Subject: [PATCH V2 12/15] cpufreq: mediatek: Use maximum voltage in init stage Date: Fri, 8 Apr 2022 12:59:05 +0800 Message-ID: <20220408045908.21671-13-rex-bc.chen@mediatek.com> X-Mailer: git-send-email 2.18.0 In-Reply-To: <20220408045908.21671-1-rex-bc.chen@mediatek.com> References: <20220408045908.21671-1-rex-bc.chen@mediatek.com> MIME-Version: 1.0 X-MTK: N Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org From: Jia-Wei Chang Two or more clients may use the same regulator, and it could cause the issue of high-freqeuncy-low-voltage. To prevent this, we use maximum voltage in mtk_cpu_dvfs_info_init(). Signed-off-by: Jia-Wei Chang --- drivers/cpufreq/mediatek-cpufreq.c | 20 +++++++++++++++++++- 1 file changed, 19 insertions(+), 1 deletion(-) diff --git a/drivers/cpufreq/mediatek-cpufreq.c b/drivers/cpufreq/mediatek-cpufreq.c index e69b16a6541e..b08ab7c14818 100644 --- a/drivers/cpufreq/mediatek-cpufreq.c +++ b/drivers/cpufreq/mediatek-cpufreq.c @@ -333,7 +333,7 @@ static int mtk_cpu_dvfs_info_init(struct mtk_cpu_dvfs_info *info, int cpu) { struct device *cpu_dev; struct dev_pm_opp *opp; - unsigned long rate; + unsigned long rate, opp_volt; int ret; cpu_dev = get_cpu_device(cpu); @@ -417,6 +417,24 @@ static int mtk_cpu_dvfs_info_init(struct mtk_cpu_dvfs_info *info, int cpu) info->intermediate_voltage = dev_pm_opp_get_voltage(opp); dev_pm_opp_put(opp); + /* Use highest opp voltage in the init stage */ + rate = U32_MAX; + opp = dev_pm_opp_find_freq_floor(info->cpu_dev, &rate); + if (IS_ERR(opp)) { + ret = PTR_ERR(opp); + dev_err(cpu_dev, "cpu%d: failed to get opp\n", info->opp_cpu); + goto out_disable_inter_clock; + } + + opp_volt = dev_pm_opp_get_voltage(opp); + dev_pm_opp_put(opp); + ret = mtk_cpufreq_set_voltage(info, opp_volt); + if (ret) { + dev_err(cpu_dev, "cpu%d: failed to scale to highest voltage %lu in proc_reg\n", + info->opp_cpu, opp_volt); + goto out_disable_inter_clock; + } + info->opp_cpu = cpu; info->opp_nb.notifier_call = mtk_cpufreq_opp_notifier; ret = dev_pm_opp_register_notifier(cpu_dev, &info->opp_nb);