From patchwork Thu Feb 22 13:57:01 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Pierre Gondois X-Patchwork-Id: 13567380 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 065DFC54788 for ; Thu, 22 Feb 2024 13:57:53 +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=HmK56ywhuQh7PI7CZ2L/krZcN3g4wpbqLD2+URTEA0o=; b=Xk9LYibo1Pza3+ fYVwgdE109ACCtfFi2ABRAuBwFQABdGhja58TJ0hYgKwCY5sFsoI3WWcpnFw/8GGP3cEFjN4b+Svr w2TGKiMXv3AuyoT3u66UljSFlnzjkkuaImOCCItmgzzA5R7sdnPL2QdU/hQ508Xn8oufM2CJel7VH eOJ9n/l5eJwx7K1CIkhjAQRrIUBqsukAm5urt3MXESxXmri0AkrhiC9W7evVBYnSmYs2FA+TmCwjF 3Aqof3AUa+PFE20VMKlPG+r8m0gLcKN4Nt+kV4XX2oT2wgU/TKVdUx5xS6L79qILoZGAnlcMB7jPi LLJFYg9i4y5fuaKj8AoA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1rd9a2-000000058WP-2Pzi; Thu, 22 Feb 2024 13:57:42 +0000 Received: from foss.arm.com ([217.140.110.172]) by bombadil.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1rd9Zk-000000058N0-277l for linux-arm-kernel@lists.infradead.org; Thu, 22 Feb 2024 13:57:25 +0000 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 4934B1007; Thu, 22 Feb 2024 05:57:59 -0800 (PST) Received: from e126645.arm.com (unknown [10.57.50.6]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id 946493F762; Thu, 22 Feb 2024 05:57:18 -0800 (PST) From: Pierre Gondois To: linux-kernel@vger.kernel.org Cc: Cristian Marussi , Christian Loehle , Ionela Voinescu , Sudeep Holla , Dietmar Eggemann , Pierre Gondois , "Rafael J. Wysocki" , Viresh Kumar , linux-arm-kernel@lists.infradead.org, linux-pm@vger.kernel.org Subject: [PATCH 3/3] cpufreq: scmi: Set transition_delay_us Date: Thu, 22 Feb 2024 14:57:01 +0100 Message-Id: <20240222135702.2005635-4-pierre.gondois@arm.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20240222135702.2005635-1-pierre.gondois@arm.com> References: <20240222135702.2005635-1-pierre.gondois@arm.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240222_055724_641101_FA1A7E75 X-CRM114-Status: GOOD ( 10.91 ) 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 Make use of the newly added callbacks: - rate_limit_get() - fast_switch_rate_limit() to populate policies's `transition_delay_us`, defined as the 'Preferred average time interval between consecutive invocations of the driver to set the frequency for this policy.' Signed-off-by: Pierre Gondois --- drivers/cpufreq/scmi-cpufreq.c | 26 ++++++++++++++++++++++++++ 1 file changed, 26 insertions(+) diff --git a/drivers/cpufreq/scmi-cpufreq.c b/drivers/cpufreq/scmi-cpufreq.c index 4ee23f4ebf4a..0b483bd0d3ca 100644 --- a/drivers/cpufreq/scmi-cpufreq.c +++ b/drivers/cpufreq/scmi-cpufreq.c @@ -144,6 +144,29 @@ scmi_get_cpu_power(struct device *cpu_dev, unsigned long *power, return 0; } +static int +scmi_get_rate_limit(u32 domain, bool has_fast_switch) +{ + int ret, rate_limit; + + if (has_fast_switch) { + /* + * Fast channels are used whenever available, + * so use their rate_limit value if populated. + */ + ret = perf_ops->fast_switch_rate_limit(ph, domain, + &rate_limit); + if (!ret && rate_limit) + return rate_limit; + } + + ret = perf_ops->rate_limit_get(ph, domain, &rate_limit); + if (ret) + return 0; + + return rate_limit; +} + static int scmi_cpufreq_init(struct cpufreq_policy *policy) { int ret, nr_opp, domain; @@ -250,6 +273,9 @@ static int scmi_cpufreq_init(struct cpufreq_policy *policy) policy->fast_switch_possible = perf_ops->fast_switch_possible(ph, domain); + policy->transition_delay_us = + scmi_get_rate_limit(domain, policy->fast_switch_possible); + return 0; out_free_opp: