From patchwork Fri Apr 8 04:58:59 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: 12806088 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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 9A7D0C433F5 for ; Fri, 8 Apr 2022 05:12:12 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-ID:Date:Subject:CC:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=Tp05Go4wbow8o61vyvqy9nGoaMLile3M3Lc+iuNtqPs=; b=yoS7QcLLasdC6D i96yGhxh/AUwK2ENv69MTSi0DpSu7P2GqkQLMaj4eobpn0s/uriuj6/geu4Fgb9/Rc9skEFOwSPJT 23xUciG9DZZCUU3+Koym8X8o9BsB+kci1JTSduMIRz1aNuVapFQMK0e+8bQFb61HLEEqtIdpuWpQ1 NvVp3E3FtmbK8H8mqzvsWzc4dM4L/NupZ3xQfD8jQ+pppfsWviEIkhEh0z248JO2xNH/P98Vwhzke 4Sd57ItPBgCiJdgx6hQbeoQcMCxonBbhZSFTFA50sM9ZjTjcMsdtTmwEvUwb20XnW8TPY4OwzjQLg ELqrZTma9j5vEKzEkiug==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1ncgtk-00F25R-JU; Fri, 08 Apr 2022 05:11:04 +0000 Received: from mailgw01.mediatek.com ([216.200.240.184]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1ncgs6-00F1BV-Rf; Fri, 08 Apr 2022 05:09:24 +0000 X-UUID: 5623ee08dd994bb788e9467fa569c1be-20220407 X-UUID: 5623ee08dd994bb788e9467fa569c1be-20220407 Received: from mtkcas66.mediatek.inc [(172.29.193.44)] by mailgw01.mediatek.com (envelope-from ) (musrelay.mediatek.com ESMTP with TLSv1.2 ECDHE-RSA-AES256-SHA384 256/256) with ESMTP id 1560569383; Thu, 07 Apr 2022 22:09:14 -0700 Received: from mtkmbs07n1.mediatek.inc (172.21.101.16) by MTKMBS62DR.mediatek.inc (172.29.94.18) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Thu, 7 Apr 2022 21:59:13 -0700 Received: from mtkcas11.mediatek.inc (172.21.101.40) by mtkmbs07n1.mediatek.inc (172.21.101.16) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Fri, 8 Apr 2022 12:59:11 +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 12:59:11 +0800 From: Rex-BC Chen To: , , , CC: , , , , , , , , , , "Andrew-sh . Cheng" Subject: [PATCH V2 06/15] cpufreq: mediatek: Record previous target vproc value Date: Fri, 8 Apr 2022 12:58:59 +0800 Message-ID: <20220408045908.21671-7-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 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220407_220922_923768_233A4D82 X-CRM114-Status: GOOD ( 14.48 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org From: Jia-Wei Chang We found the buck voltage may not be exactly the same with what we set because CPU may share the same buck with other module. Therefore, we need to record the previous desired value instead of reading it from regulators. Signed-off-by: Andrew-sh.Cheng Signed-off-by: Jia-Wei Chang --- drivers/cpufreq/mediatek-cpufreq.c | 31 +++++++++++++++++++----------- 1 file changed, 20 insertions(+), 11 deletions(-) diff --git a/drivers/cpufreq/mediatek-cpufreq.c b/drivers/cpufreq/mediatek-cpufreq.c index dc4a87e68940..472f4de29e5f 100644 --- a/drivers/cpufreq/mediatek-cpufreq.c +++ b/drivers/cpufreq/mediatek-cpufreq.c @@ -40,6 +40,7 @@ struct mtk_cpu_dvfs_info { struct list_head list_head; int intermediate_voltage; bool need_voltage_tracking; + int old_vproc; }; static LIST_HEAD(dvfs_info_list); @@ -190,11 +191,17 @@ static int mtk_cpufreq_voltage_tracking(struct mtk_cpu_dvfs_info *info, static int mtk_cpufreq_set_voltage(struct mtk_cpu_dvfs_info *info, int vproc) { + int ret; + if (info->need_voltage_tracking) - return mtk_cpufreq_voltage_tracking(info, vproc); + ret = mtk_cpufreq_voltage_tracking(info, vproc); else - return regulator_set_voltage(info->proc_reg, vproc, - vproc + VOLT_TOL); + ret = regulator_set_voltage(info->proc_reg, vproc, + MAX_VOLT_LIMIT); + if (!ret) + info->old_vproc = vproc; + + return ret; } static int mtk_cpufreq_set_target(struct cpufreq_policy *policy, @@ -211,15 +218,7 @@ static int mtk_cpufreq_set_target(struct cpufreq_policy *policy, inter_vproc = info->intermediate_voltage; - old_freq_hz = clk_get_rate(cpu_clk); - old_vproc = regulator_get_voltage(info->proc_reg); - if (old_vproc < 0) { - pr_err("%s: invalid Vproc value: %d\n", __func__, old_vproc); - return old_vproc; - } - freq_hz = freq_table[index].frequency * 1000; - opp = dev_pm_opp_find_freq_ceil(cpu_dev, &freq_hz); if (IS_ERR(opp)) { pr_err("cpu%d: failed to find OPP for %ld\n", @@ -229,6 +228,16 @@ static int mtk_cpufreq_set_target(struct cpufreq_policy *policy, vproc = dev_pm_opp_get_voltage(opp); dev_pm_opp_put(opp); + old_freq_hz = clk_get_rate(cpu_clk); + old_vproc = info->old_vproc; + if (old_vproc == 0) + old_vproc = regulator_get_voltage(info->proc_reg); + if (old_vproc < 0) { + dev_err(cpu_dev, "%s: invalid Vproc value: %d\n", + __func__, old_vproc); + return old_vproc; + } + /* * If the new voltage or the intermediate voltage is higher than the * current voltage, scale up voltage first.