From patchwork Wed Jul 24 01:42:18 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Saravana Kannan X-Patchwork-Id: 11055501 X-Patchwork-Delegate: viresh.linux@gmail.com 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 234C5138D for ; Wed, 24 Jul 2019 01:42:39 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 10635286B5 for ; Wed, 24 Jul 2019 01:42:39 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id F3FA5286E0; Wed, 24 Jul 2019 01:42:38 +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 7E8E3286B5 for ; Wed, 24 Jul 2019 01:42:38 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728507AbfGXBme (ORCPT ); Tue, 23 Jul 2019 21:42:34 -0400 Received: from mail-pf1-f201.google.com ([209.85.210.201]:49348 "EHLO mail-pf1-f201.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728374AbfGXBmd (ORCPT ); Tue, 23 Jul 2019 21:42:33 -0400 Received: by mail-pf1-f201.google.com with SMTP id 145so27442409pfw.16 for ; Tue, 23 Jul 2019 18:42:33 -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=AlLsqq3JZoQR71QbtZw0BssW/4/b+9WusH3P4c2zA1g=; b=tmIxXRh1CzRVBErDXUtwQUib7z0gyuxbrGT4Dumdpo/LNx5ctaIziALV0oC5vyzdtF ZUYLE5BllTzxVwqOtyxmp+aCGIuKR9GKgEcLfh3ezGCjqa0xrWQhkYvklb52TNMP3ymN b/QcJ2/GaLDuhNFs05zgY8kY79sLDbc03HH1VBFrUUdioOpiYx5Ag3hK9kY2tw4pm8Gs Ez/G9GLiHLQpuuq/Fx+CG2OEGbld5166zf6hvstPbj1zy4/2Ggtsvg5hXMCmmvl85nd6 SWk51mt+f4FMxt7HoYCOLW/F9MPvzK1XhJ+9xjKjria5kw2+4iy0O9KmAAYi4z6vZCA4 UYfg== 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=AlLsqq3JZoQR71QbtZw0BssW/4/b+9WusH3P4c2zA1g=; b=I7H+XvQpbdy6Ll253pnwREcl4a4H47TS6Et7MyZuGJAPVMA3T2DbDGVHoyKZJ/96Jt wdfCjB4qdvIWisr16/n5ja1XP/OWyc3APHGPahTJpbJcZL+Wrp+DnzRZVsKtIeDYcJwj t+ZoR+P0vb15+XMLYIigR9UAJVN4JdqFPattZGTyC/kSQKpQrrcDPXRAJD95wys+d7EW AeHtLZMmfCsyr3byNcBz3kxnIrNfZSO0IJbFoUXEuv+wu8Nt3UgAGd7gXdla7pwN4P4U fqd4CGgsNXr8aYxwalDLfFl6xYuomYZOIxjR+jWTlXuTQjpLm/Tu0U+mkMnt4r1e5Cia +DzQ== X-Gm-Message-State: APjAAAX5QefIiKlhuEpFBD6p4UOIUWDo7w7VGBagmceko9jtjp7Tvz8h +zQoWkAc8WszTDyZWNKPbyFmlZfB0hTvB9Q= X-Google-Smtp-Source: APXvYqzkaFKYh5Ik7ceQ1KGE0Fun2/u+dwQaWFzR63gtTpqlU+7qAEOGUQV3Nw0gt36cj5Mvk0/G9fNaDXazOnM= X-Received: by 2002:a65:49cc:: with SMTP id t12mr73912466pgs.83.1563932552371; Tue, 23 Jul 2019 18:42:32 -0700 (PDT) Date: Tue, 23 Jul 2019 18:42:18 -0700 In-Reply-To: <20190724014222.110767-1-saravanak@google.com> Message-Id: <20190724014222.110767-3-saravanak@google.com> Mime-Version: 1.0 References: <20190724014222.110767-1-saravanak@google.com> X-Mailer: git-send-email 2.22.0.709.g102302147b-goog Subject: [PATCH v4 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 | 53 ++++++++++++++++++++++++++++++++++++++++++ include/linux/pm_opp.h | 11 +++++++++ 2 files changed, 64 insertions(+) diff --git a/drivers/opp/core.c b/drivers/opp/core.c index 438fcd134d93..5460b7da110e 100644 --- a/drivers/opp/core.c +++ b/drivers/opp/core.c @@ -1883,6 +1883,59 @@ void dev_pm_opp_detach_genpd(struct opp_table *opp_table) } EXPORT_SYMBOL_GPL(dev_pm_opp_detach_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 NULL 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 = 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..21d331de98b9 100644 --- a/include/linux/pm_opp.h +++ b/include/linux/pm_opp.h @@ -130,6 +130,9 @@ struct opp_table *dev_pm_opp_register_set_opp_helper(struct device *dev, int (*s 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); +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_sharing_cpus(struct device *cpu_dev, const struct cpumask *cpumask); @@ -299,6 +302,14 @@ static inline struct opp_table *dev_pm_opp_attach_genpd(struct device *dev, cons static inline void dev_pm_opp_detach_genpd(struct opp_table *opp_table) {} +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 NULL; +} + static inline int dev_pm_opp_xlate_performance_state(struct opp_table *src_table, struct opp_table *dst_table, unsigned int pstate) { return -ENOTSUPP;