From patchwork Thu Feb 4 08:14:22 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Hsin-Yi Wang X-Patchwork-Id: 12066519 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 X-Spam-Level: X-Spam-Status: No, score=-19.1 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 6E680C433E0 for ; Thu, 4 Feb 2021 08:15:56 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 2872564F55 for ; Thu, 4 Feb 2021 08:15:56 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234889AbhBDIPf (ORCPT ); Thu, 4 Feb 2021 03:15:35 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:58654 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234861AbhBDIPM (ORCPT ); Thu, 4 Feb 2021 03:15:12 -0500 Received: from mail-pl1-x62d.google.com (mail-pl1-x62d.google.com [IPv6:2607:f8b0:4864:20::62d]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 1309FC061788 for ; Thu, 4 Feb 2021 00:14:32 -0800 (PST) Received: by mail-pl1-x62d.google.com with SMTP id 8so1333224plc.10 for ; Thu, 04 Feb 2021 00:14:32 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=x5CYaMWQw/4Wx6VXz67FQpkoWBucz0YJ72zvXGes1Ck=; b=QZvelL5k11SF4Dg/A6++a6KsE/vSckTzOkNENbQWJCmUC4yyMS/Mb6rz/WKA32rxjc cGnd7sDUuvE+F/qbVYvFQqoRzxsWNQeagz56NbQnnFecUqBdKwcIRfBzgtOn9bz35R3z +AosgC/5C0oTMMyk052i2IqSqShkwb4b6Q+JM= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=x5CYaMWQw/4Wx6VXz67FQpkoWBucz0YJ72zvXGes1Ck=; b=ezTlEUkT/r+OmnPuD5fLl4hngc2B0+A/g6C1rdobs5xSo5xgHbZTpGzV7abP3nWyYZ jIMqN8vJCXDJFH8OfJE1IUZ1BmHPYh1EAnAuibMW492TxefF+LzEsfhWKkyaVWp5I0Ph PrgZ8MjdXTjOR5xLyzcusxjNgemwzhuoK7q3k8orTbNWKRg6FOAtAM71HVzmN/cMjvEz hey67elYes0TlUk1VN7PF067FPp1Y0tIBALsUrNaqatwdbUeFOmoBxT6zoqj5FhmBsrM +59NJrc76QPHNogiZBZNmHcTse0ja7qw/kAATFClKsRpR4npqTqIR79h1qjX6SqcrRb7 p69A== X-Gm-Message-State: AOAM533frSRSz/7jl3Q5WI97MMM+mpvcEAKKfFjoJ+esantV2RRYqCfm pea+2RmxtdiiGv3DsebDay8Zv4ntNMjTHg== X-Google-Smtp-Source: ABdhPJztsSY/dpx9ZsIbkOQnPw+LFxN23y4ugBHxtV0o8MUFdQB7zo18NhIUL+2TBYQXmxc2b2kyXQ== X-Received: by 2002:a17:902:d2c1:b029:de:7c38:f86a with SMTP id n1-20020a170902d2c1b02900de7c38f86amr7102021plc.83.1612426471523; Thu, 04 Feb 2021 00:14:31 -0800 (PST) Received: from hsinyi-z840.tpe.corp.google.com ([2401:fa00:1:10:ed70:6d43:9c6a:2e22]) by smtp.gmail.com with ESMTPSA id e3sm5091258pgs.60.2021.02.04.00.14.29 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 04 Feb 2021 00:14:31 -0800 (PST) From: Hsin-Yi Wang To: Viresh Kumar , linux-pm@vger.kernel.org Cc: Nishanth Menon , Stephen Boyd , "Rafael J . Wysocki" , linux-kernel@vger.kernel.org, MyungJoo Ham , Kyungmin Park , Chanwoo Choi , Saravana Kannan Subject: [PATCH v6 1/3] OPP: Add function to look up required OPP's for a given OPP Date: Thu, 4 Feb 2021 16:14:22 +0800 Message-Id: <20210204081424.2219311-2-hsinyi@chromium.org> X-Mailer: git-send-email 2.30.0.365.g02bc693789-goog In-Reply-To: <20210204081424.2219311-1-hsinyi@chromium.org> References: <20210204081424.2219311-1-hsinyi@chromium.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org From: Saravana Kannan Add a function that allows looking up required OPPs given a source OPP table, destination OPP table and the source OPP. Signed-off-by: Saravana Kannan Signed-off-by: Hsin-Yi Wang --- drivers/opp/core.c | 59 ++++++++++++++++++++++++++++++++++++++++++ include/linux/pm_opp.h | 7 +++++ 2 files changed, 66 insertions(+) diff --git a/drivers/opp/core.c b/drivers/opp/core.c index dc95d29e94c1b..fba67ae40aefc 100644 --- a/drivers/opp/core.c +++ b/drivers/opp/core.c @@ -2398,6 +2398,65 @@ devm_pm_opp_attach_genpd(struct device *dev, const char **names, } EXPORT_SYMBOL_GPL(devm_pm_opp_attach_genpd); +/** + * dev_pm_opp_xlate_required_opp() - Find required OPP for @src_table OPP. + * @src_table: OPP table which has @dst_table as one of its required OPP table. + * @dst_table: Required OPP table of the @src_table. + * + * This function returns the OPP (present in @dst_table) pointed out by the + * "required-opps" property of the OPP (present in @src_table). + * + * The callers are required to call dev_pm_opp_put() for the returned OPP after + * use. + * + * Return: destination table OPP on success, otherwise -EINVAL or -ENODEV based + * on errors. + */ +struct dev_pm_opp *dev_pm_opp_xlate_required_opp(struct opp_table *src_table, + struct opp_table *dst_table, + struct dev_pm_opp *src_opp) +{ + struct dev_pm_opp *opp, *dest_opp = ERR_PTR(-EINVAL); + int i; + + if (!src_table || !dst_table || !src_opp || + !src_table->required_opp_tables) + return ERR_PTR(-EINVAL); + + /* required-opps not fully initialized yet */ + if (lazy_linking_pending(src_table)) + return ERR_PTR(-EINVAL); + + for (i = 0; i < src_table->required_opp_count; i++) { + if (src_table->required_opp_tables[i] == dst_table) + break; + } + + if (unlikely(i == src_table->required_opp_count)) { + pr_err("%s: Couldn't find matching OPP table (%p: %p)\n", + __func__, src_table, dst_table); + return ERR_PTR(-ENODEV); + } + + mutex_lock(&src_table->lock); + + list_for_each_entry(opp, &src_table->opp_list, node) { + if (opp == src_opp) { + dest_opp = opp->required_opps[i]; + dev_pm_opp_get(dest_opp); + goto unlock; + } + } + + pr_err("%s: Couldn't find matching OPP (%p: %p)\n", __func__, src_table, + dst_table); + +unlock: + mutex_unlock(&src_table->lock); + + return dest_opp; +} + /** * dev_pm_opp_xlate_performance_state() - Find required OPP's pstate for src_table. * @src_table: OPP table which has dst_table as one of its required OPP table. diff --git a/include/linux/pm_opp.h b/include/linux/pm_opp.h index ab1d15ce559db..c0371efa4a0f2 100644 --- a/include/linux/pm_opp.h +++ b/include/linux/pm_opp.h @@ -156,6 +156,7 @@ struct opp_table *devm_pm_opp_register_set_opp_helper(struct device *dev, int (* struct opp_table *dev_pm_opp_attach_genpd(struct device *dev, const char **names, struct device ***virt_devs); void dev_pm_opp_detach_genpd(struct opp_table *opp_table); struct opp_table *devm_pm_opp_attach_genpd(struct device *dev, const char **names, struct device ***virt_devs); +struct dev_pm_opp *dev_pm_opp_xlate_required_opp(struct opp_table *src_table, struct opp_table *dst_table, struct dev_pm_opp *src_opp); int dev_pm_opp_xlate_performance_state(struct opp_table *src_table, struct opp_table *dst_table, unsigned int pstate); int dev_pm_opp_set_rate(struct device *dev, unsigned long target_freq); int dev_pm_opp_set_opp(struct device *dev, struct dev_pm_opp *opp); @@ -367,6 +368,12 @@ static inline struct opp_table *devm_pm_opp_attach_genpd(struct device *dev, return ERR_PTR(-EOPNOTSUPP); } +static inline struct dev_pm_opp *dev_pm_opp_xlate_required_opp(struct opp_table *src_table, + struct opp_table *dst_table, struct dev_pm_opp *src_opp) +{ + return ERR_PTR(-EOPNOTSUPP); +} + static inline int dev_pm_opp_xlate_performance_state(struct opp_table *src_table, struct opp_table *dst_table, unsigned int pstate) { return -EOPNOTSUPP;