From patchwork Thu Sep 12 07:22:28 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jie Zhan X-Patchwork-Id: 13801560 Received: from szxga03-in.huawei.com (szxga03-in.huawei.com [45.249.212.189]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 4BDAF189521; Thu, 12 Sep 2024 07:28:26 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=45.249.212.189 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1726126107; cv=none; b=QXJZpEKH2ER+Jer+ZMdU2rgl1JQxB4X0O+C1FmMbpl0vQfj4d/X/GvyT9cmQ4RKeMgumxgRLn7aUZOxatRBHXMdXk8w/2CQaMRqDEw2fs79rrGsh8EJ+ct89gEK8hjm4FZVzhdvp1z0QOZbdsvL342fPipY8roeLm+ZWpC/Etsk= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1726126107; c=relaxed/simple; bh=RrPTbcCpAfV8k1AbAO9/s+RxS4FFPanYF+XlEDPmo2A=; h=From:To:CC:Subject:Date:Message-ID:MIME-Version:Content-Type; b=fQrFItYWvNNb5EcCuKFedQU1wIQ01TgNR7tdLe73lisSlGuHVuQCrLFG5juzsGU3hkf3zSkfg9INBmxNYvaWe6I9DjhRY3FEo8FMg3TX8ztXE+bSD/hSmN5OhVMb6SKuwodjtrWqamyLn1ghtWzdfbtiXQ2V8Ma8iBYDNLfRJG0= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=hisilicon.com; spf=pass smtp.mailfrom=hisilicon.com; arc=none smtp.client-ip=45.249.212.189 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=hisilicon.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=hisilicon.com Received: from mail.maildlp.com (unknown [172.19.163.252]) by szxga03-in.huawei.com (SkyGuard) with ESMTP id 4X48Dc2thJz69XP; Thu, 12 Sep 2024 15:28:16 +0800 (CST) Received: from dggpeml500019.china.huawei.com (unknown [7.185.36.137]) by mail.maildlp.com (Postfix) with ESMTPS id 856981800D4; Thu, 12 Sep 2024 15:28:23 +0800 (CST) Received: from localhost.localdomain (10.90.30.45) by dggpeml500019.china.huawei.com (7.185.36.137) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.1.2507.39; Thu, 12 Sep 2024 15:28:23 +0800 From: Jie Zhan To: , , , , CC: , , , , , , , , , , , Subject: [PATCH v2 0/3] cppc_cpufreq: Rework ->get() error handling when cores are idle Date: Thu, 12 Sep 2024 15:22:28 +0800 Message-ID: <20240912072231.439332-1-zhanjie9@hisilicon.com> X-Mailer: git-send-email 2.30.0 Precedence: bulk X-Mailing-List: linux-pm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-ClientProxiedBy: dggems706-chm.china.huawei.com (10.3.19.183) To dggpeml500019.china.huawei.com (7.185.36.137) CPPC feedback counters can be unchanged or 0 when cores are idle, e.g. clock-gated or power-gated. In such case, get the latest desired perf for calculating frequency. Also, the HiSilicon CPPC workaround is now handled by the common code and can be removed. Jie Zhan (3): cppc_cpufreq: Return desired perf in ->get() if feedback counters are 0 cppc_cpufreq: Return latest desired perf if feedback counters don't change cppc_cpufreq: Remove HiSilicon CPPC workaround drivers/cpufreq/cppc_cpufreq.c | 103 +++++++++------------------------ 1 file changed, 27 insertions(+), 76 deletions(-)