From patchwork Fri Aug 18 02:06:16 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mark Tseng X-Patchwork-Id: 13357222 X-Patchwork-Delegate: viresh.linux@gmail.com 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 7A7D3C71132 for ; Fri, 18 Aug 2023 02:07:31 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1352616AbjHRCG7 (ORCPT ); Thu, 17 Aug 2023 22:06:59 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:46590 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1357164AbjHRCGg (ORCPT ); Thu, 17 Aug 2023 22:06:36 -0400 Received: from mailgw01.mediatek.com (unknown [60.244.123.138]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 4FA9130E9; Thu, 17 Aug 2023 19:06:28 -0700 (PDT) X-UUID: d240c3cc3d6b11ee9cb5633481061a41-20230818 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=mediatek.com; s=dk; h=Content-Type:MIME-Version:Message-ID:Date:Subject:CC:To:From; bh=y9wESq3yLX5gwIyFrtLmnOhsV7s06v0xZ8e8yqmasio=; b=k/TeQ7U4fWg0Nb/079F/2v9r8CZNSvkKqvvG5LJwzY9036+E4dUMLaRrHwbEO7y4veztTWW/ksfs5jsZth762hErcIPn0+D0XX15y3TOoAVEZ7ciQ6JVqsJM+MKdsun044ThqxYK256XNi3QoW1lmtHKnuGGnd92JCBTsBZj/Y0=; X-CID-P-RULE: Release_Ham X-CID-O-INFO: VERSION:1.1.31,REQID:fe7f9e6b-35e5-4dbb-bd2c-551fdd9076bc,IP:0,U RL:0,TC:0,Content:0,EDM:0,RT:0,SF:100,FILE:0,BULK:0,RULE:Release_Ham,ACTIO N:release,TS:100 X-CID-INFO: VERSION:1.1.31,REQID:fe7f9e6b-35e5-4dbb-bd2c-551fdd9076bc,IP:0,URL :0,TC:0,Content:0,EDM:0,RT:0,SF:100,FILE:0,BULK:0,RULE:Spam_GS981B3D,ACTIO N:quarantine,TS:100 X-CID-META: VersionHash:0ad78a4,CLOUDID:ce8be612-4929-4845-9571-38c601e9c3c9,B ulkID:23081810062252NX6IJA,BulkQuantity:1,Recheck:0,SF:38|29|28|17|19|48,T C:nil,Content:0,EDM:-3,IP:nil,URL:0,File:nil,Bulk:40,QS:nil,BEC:nil,COL:0, OSI:0,OSA:0,AV:0,LES:1,SPR:NO,DKR:0,DKP:0,BRR:0,BRE:0 X-CID-BVR: 0 X-CID-BAS: 0,_,0,_ X-CID-FACTOR: TF_CID_SPAM_FSD,TF_CID_SPAM_SNR,TF_CID_SPAM_SDM,TF_CID_SPAM_ASC, TF_CID_SPAM_FAS X-UUID: d240c3cc3d6b11ee9cb5633481061a41-20230818 Received: from mtkmbs14n2.mediatek.inc [(172.21.101.76)] by mailgw01.mediatek.com (envelope-from ) (Generic MTA with TLSv1.2 ECDHE-RSA-AES256-GCM-SHA384 256/256) with ESMTP id 731415993; Fri, 18 Aug 2023 10:06:19 +0800 Received: from mtkmbs13n1.mediatek.inc (172.21.101.193) by mtkmbs13n2.mediatek.inc (172.21.101.108) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1118.26; Fri, 18 Aug 2023 10:06:18 +0800 Received: from mtksdccf07.mediatek.inc (172.21.84.99) by mtkmbs13n1.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.2.1118.26 via Frontend Transport; Fri, 18 Aug 2023 10:06:18 +0800 From: Mark Tseng To: , , , , , CC: , , , , , , , Subject: [PATCH] cpufreq: mediatek: change transition delay for MT8186 Date: Fri, 18 Aug 2023 10:06:16 +0800 Message-ID: <20230818020616.4748-1-chun-jen.tseng@mediatek.com> X-Mailer: git-send-email 2.18.0 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org For MT8186, it has policy0 and policy6 by different governor thread,so it may be call cpufreq->set_target_index() by different core. In general case, it must check BCPU, LCPU and CCI together then take about 10ms. Atfer 44295af5019f this patch, it may call cpufreq_out_of_sync() by cpufreq_verify_current_freq() because current frequency is bigger than clk_get_rate() ouver 1Mh. By the same time, it may call cpufreq->set_target_index() again. So, the CCI freq may be too lower for BCPU cause BCPU kernel panic. So, it should change the default transition delay 1ms to 10ms. It can promise the next freq setting then governor trigger new freq change. Fixes: 44295af5019f ("cpufreq: use correct unit when verify cur freq") Signed-off-by: Mark Tseng --- drivers/cpufreq/mediatek-cpufreq.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/drivers/cpufreq/mediatek-cpufreq.c b/drivers/cpufreq/mediatek-cpufreq.c index a0a61919bc4c..5633a5357e8f 100644 --- a/drivers/cpufreq/mediatek-cpufreq.c +++ b/drivers/cpufreq/mediatek-cpufreq.c @@ -23,6 +23,7 @@ struct mtk_cpufreq_platform_data { int sram_min_volt; int sram_max_volt; bool ccifreq_supported; + unsigned int transition_delay_us; }; /* @@ -595,6 +596,7 @@ static int mtk_cpufreq_init(struct cpufreq_policy *policy) policy->freq_table = freq_table; policy->driver_data = info; policy->clk = info->cpu_clk; + policy->transition_delay_us = info->soc_data->transition_delay_us; return 0; } @@ -689,6 +691,7 @@ static const struct mtk_cpufreq_platform_data mt2701_platform_data = { .sram_min_volt = 0, .sram_max_volt = 1150000, .ccifreq_supported = false, + .transition_delay_us = 1000, }; static const struct mtk_cpufreq_platform_data mt7622_platform_data = { @@ -698,6 +701,7 @@ static const struct mtk_cpufreq_platform_data mt7622_platform_data = { .sram_min_volt = 0, .sram_max_volt = 1350000, .ccifreq_supported = false, + .transition_delay_us = 1000, }; static const struct mtk_cpufreq_platform_data mt7623_platform_data = { @@ -705,6 +709,7 @@ static const struct mtk_cpufreq_platform_data mt7623_platform_data = { .max_volt_shift = 200000, .proc_max_volt = 1300000, .ccifreq_supported = false, + .transition_delay_us = 1000, }; static const struct mtk_cpufreq_platform_data mt8183_platform_data = { @@ -714,6 +719,7 @@ static const struct mtk_cpufreq_platform_data mt8183_platform_data = { .sram_min_volt = 0, .sram_max_volt = 1150000, .ccifreq_supported = true, + .transition_delay_us = 1000, }; static const struct mtk_cpufreq_platform_data mt8186_platform_data = { @@ -723,6 +729,7 @@ static const struct mtk_cpufreq_platform_data mt8186_platform_data = { .sram_min_volt = 850000, .sram_max_volt = 1118750, .ccifreq_supported = true, + .transition_delay_us = 10000, }; static const struct mtk_cpufreq_platform_data mt8516_platform_data = { @@ -732,6 +739,7 @@ static const struct mtk_cpufreq_platform_data mt8516_platform_data = { .sram_min_volt = 0, .sram_max_volt = 1310000, .ccifreq_supported = false, + .transition_delay_us = 1000, }; /* List of machines supported by this driver */