From patchwork Wed Jul 17 22:23:37 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Saravana Kannan X-Patchwork-Id: 11048279 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id D17FE13BD for ; Wed, 17 Jul 2019 22:24:04 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id BFCB3212BE for ; Wed, 17 Jul 2019 22:24:04 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id B40152877F; Wed, 17 Jul 2019 22:24:04 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-15.5 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI, USER_IN_DEF_DKIM_WL autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 4B48D286B0 for ; Wed, 17 Jul 2019 22:24:04 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729022AbfGQWX6 (ORCPT ); Wed, 17 Jul 2019 18:23:58 -0400 Received: from mail-pg1-f201.google.com ([209.85.215.201]:32967 "EHLO mail-pg1-f201.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729723AbfGQWX5 (ORCPT ); Wed, 17 Jul 2019 18:23:57 -0400 Received: by mail-pg1-f201.google.com with SMTP id a21so8586661pgv.0 for ; Wed, 17 Jul 2019 15:23:57 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=date:in-reply-to:message-id:mime-version:references:subject:from:to :cc; bh=7ut4pV8VU2XMvAiC0EUAug5uzDTyE8K6amY1HkNFP0k=; b=O70FLfpIET7sMGLffRwo9AG66vfmK6/bnvOuCCmJJljFc5byVD6IxQzah2oKNGO1MX If8mLMWT2xN01n97Sdv+4N2ZIz7/t4N6FFW+j1wRyw60Oj+yZ+T1Cf9laQ1gzrXFRGXf C8pcBSw2jxl8JJzTwshcULF8NjGFZkIGv8vzLSK9hNMDAKnMTn2gznqaCTtXyW6jp9k3 MdlWdVJKOCGmzC5xaHBp3YNAcZYwy4cb8+AMd9Q2xdYl3DzhzEsav8qwDeoz1iXXTzKB GEOifcTdRKauqamU4ynDhamTF5T6eo7kCix4f6d4+md2JcKcFxZN7dwRIuIbPJ3uODZo MPww== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:in-reply-to:message-id:mime-version :references:subject:from:to:cc; bh=7ut4pV8VU2XMvAiC0EUAug5uzDTyE8K6amY1HkNFP0k=; b=Al2qfuI8m2d7/mFcrRGOmkwU6S0TAU9MrAMO5rffTGG9LUp1rz7fPw22J6uUcAthKx TO12voXSneeAGgRnUgvg0I5iXalaW9OdLxxJ61puDu4L/iI4N06YJmCYi/4/gQx8cqE3 hRIckOlu2yukDYbWjgHOLJ6u6i+oVek7D1Y69fxJ0Vo3ExMdR2afcAoQVYhG6w4/BTBP UAwR9EA1ILj5kBZtgnnExsiyKGfR4vaukqbv9OlIjqDU/LGLtawP5J8dxUwkuav120eZ HS2Suo4w8b14yuiet6A6e/Uc4dsq2ZMJlL58oX/pHZRT8lfRJIFxY6e4NHE+/hZc5Gy+ vU5g== X-Gm-Message-State: APjAAAUN/qEGi8lqqDGTUv6Vft7osPCp+xhFQSzjCgBHdsNET6BVfFOp neV3FmQ+NKzWCJKlTc0nAktwGV1YPeePo94= X-Google-Smtp-Source: APXvYqxpyhog97eYpe3tvuoeEK3ZGMJGr/4T2l9mqy6Eov3lFXO4Yz0bxpt58Gu+SD0h2HiGys1wFILZH+fiExc= X-Received: by 2002:a63:d415:: with SMTP id a21mr42685588pgh.229.1563402236508; Wed, 17 Jul 2019 15:23:56 -0700 (PDT) Date: Wed, 17 Jul 2019 15:23:37 -0700 In-Reply-To: <20190717222340.137578-1-saravanak@google.com> Message-Id: <20190717222340.137578-3-saravanak@google.com> Mime-Version: 1.0 References: <20190717222340.137578-1-saravanak@google.com> X-Mailer: git-send-email 2.22.0.510.g264f2c817a-goog Subject: [PATCH v3 2/5] OPP: Add function to look up required OPP's for a given OPP From: Saravana Kannan To: MyungJoo Ham , Kyungmin Park , Chanwoo Choi , Viresh Kumar , Nishanth Menon , Stephen Boyd , "Rafael J. Wysocki" Cc: Saravana Kannan , Sibi Sankar , kernel-team@android.com, linux-pm@vger.kernel.org, linux-kernel@vger.kernel.org Sender: linux-pm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP 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 --- drivers/opp/core.c | 54 ++++++++++++++++++++++++++++++++++++++++++ include/linux/pm_opp.h | 11 +++++++++ 2 files changed, 65 insertions(+) diff --git a/drivers/opp/core.c b/drivers/opp/core.c index 438fcd134d93..72c055a3f6b7 100644 --- a/drivers/opp/core.c +++ b/drivers/opp/core.c @@ -1883,6 +1883,60 @@ void dev_pm_opp_detach_genpd(struct opp_table *opp_table) } EXPORT_SYMBOL_GPL(dev_pm_opp_detach_genpd); +/** + * dev_pm_opp_xlate_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. + * @pstate: OPP 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 NULL on errors. + */ +struct dev_pm_opp *dev_pm_opp_xlate_opp(struct opp_table *src_table, + struct opp_table *dst_table, + struct dev_pm_opp *src_opp) +{ + struct dev_pm_opp *opp, *dest_opp = NULL; + int i; + + if (!src_table || !dst_table || !src_opp) + return NULL; + + for (i = 0; i < src_table->required_opp_count; i++) { + if (src_table->required_opp_tables[i]->np == dst_table->np) + 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 NULL; + } + + 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 af5021f27cb7..36f52b9cf24a 100644 --- a/include/linux/pm_opp.h +++ b/include/linux/pm_opp.h @@ -131,6 +131,9 @@ void dev_pm_opp_unregister_set_opp_helper(struct opp_table *opp_table); struct opp_table *dev_pm_opp_attach_genpd(struct device *dev, const char **names); void dev_pm_opp_detach_genpd(struct opp_table *opp_table); int dev_pm_opp_xlate_performance_state(struct opp_table *src_table, struct opp_table *dst_table, unsigned int pstate); +struct dev_pm_opp *dev_pm_opp_xlate_opp(struct opp_table *src_table, + struct opp_table *dst_table, + struct dev_pm_opp *src_opp); int dev_pm_opp_set_rate(struct device *dev, unsigned long target_freq); int dev_pm_opp_set_sharing_cpus(struct device *cpu_dev, const struct cpumask *cpumask); int dev_pm_opp_get_sharing_cpus(struct device *cpu_dev, struct cpumask *cpumask); @@ -304,6 +307,14 @@ static inline int dev_pm_opp_xlate_performance_state(struct opp_table *src_table return -ENOTSUPP; } +static inline struct dev_pm_opp *dev_pm_opp_xlate_opp( + struct opp_table *src_table, + struct opp_table *dst_table, + struct dev_pm_opp *src_opp) +{ + return NULL; +} + static inline int dev_pm_opp_set_rate(struct device *dev, unsigned long target_freq) { return -ENOTSUPP;