From patchwork Thu Sep 12 07:19:58 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jie Zhan X-Patchwork-Id: 13801555 Received: from szxga04-in.huawei.com (szxga04-in.huawei.com [45.249.212.190]) (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 0707A383; Thu, 12 Sep 2024 07:25:56 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=45.249.212.190 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1726125959; cv=none; b=g40buKjZuMQnlYFcuTwOncfh5taPe2tB+3H4AxMK0ixvmgA3qrEZpvgo24EcqvMzMh851zGgRHlfRkMK2fycARyoUZcVrV9BswTZN0qJA/AkFiqdYBBlsqkzA8zdbZWwOcRhU3psPgQO42vgwQ4nj0zrHI74DQZJEoC2KHhpaT0= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1726125959; c=relaxed/simple; bh=yqkaUARPSxjgK9nVazge9e3tyP0UO4vjPWJjbjH9x2I=; h=From:To:CC:Subject:Date:Message-ID:MIME-Version:Content-Type; b=A7ELlQ7PWl3p2HUoBIqBeJqRMXu3CzulX5zE3JKoX/FgW6Qy7Zbt0M9miBee9WyxjZ+Ym0ws6nWqJuXcLtbxEzNIVnzUbB91eHLT2Bnute+zBWDG8oyn/UFGQLw2ws3cDBvOF3DxX+8VkzhL+rAyzTXMGybV1IOrkBKZBPHC+mQ= 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=45.249.212.190 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 [172.19.88.214]) by szxga04-in.huawei.com (SkyGuard) with ESMTP id 4X489l2G0nz20l3L; Thu, 12 Sep 2024 15:25:47 +0800 (CST) Received: from dggpeml500019.china.huawei.com (unknown [7.185.36.137]) by mail.maildlp.com (Postfix) with ESMTPS id 3C1361A016C; Thu, 12 Sep 2024 15:25:54 +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 15:25:53 +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 15:19:58 +0800 Message-ID: <20240912072001.433980-1-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: dggems702-chm.china.huawei.com (10.3.19.179) To dggpeml500019.china.huawei.com (7.185.36.137) Internal: A quick update of V2 with the feedback received today. Also, cc'd a wider range of people. Looking forward to further discussion and feedback. ----------------- External: 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(-)