From patchwork Sat Jun 22 00:34:47 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Saravana Kannan X-Patchwork-Id: 11011157 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 3C7901398 for ; Sat, 22 Jun 2019 00:35:09 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 2CB0A28B9D for ; Sat, 22 Jun 2019 00:35:09 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 20DAA28BB1; Sat, 22 Jun 2019 00:35:09 +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 7579E28BAB for ; Sat, 22 Jun 2019 00:35:08 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726386AbfFVAfB (ORCPT ); Fri, 21 Jun 2019 20:35:01 -0400 Received: from mail-pf1-f202.google.com ([209.85.210.202]:51341 "EHLO mail-pf1-f202.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726130AbfFVAfA (ORCPT ); Fri, 21 Jun 2019 20:35:00 -0400 Received: by mail-pf1-f202.google.com with SMTP id 145so5336379pfv.18 for ; Fri, 21 Jun 2019 17:35:00 -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=55ECQLYpQeuYJFjToVK2bkLCDXOJV5cNzofiMV5ttzw=; b=u2m8w/LyjTKU398ywsG1EgvHiUfgIU5yp696wFXRjl9TB1xpA42rFJUABHd3vVWwlH m94rzxMY/7apBRBw+EzDWNWWFHiOce1gFwYhnzwPKEs+qxbIQOV2le2AlFx+zWKyfDDL ZfUtH3r81qkp6royf/6nBfcr14HuZI+CKqcc5GGB159p8eVk4RfFWqF8ARObvl5UoJwA gA0XfLCJ95GBLcqdWouZzNPsy0187RixzBRsfF+necBVm72zAkyT4VeQgg2QYpP1/bAb jfO0t/zpMrCOno6C6xQ6BK4O9L2/UNgR+6dzm31Z2N50Z3gJWER+tT59uTfkMOTbojNi JT5g== 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=55ECQLYpQeuYJFjToVK2bkLCDXOJV5cNzofiMV5ttzw=; b=MUFEeCzz/5eSz/U5Qjc5xvhm9Gg+iWUSdjO9Bv1IIO7hMEkXECbaTeXNeqsUs5zAPn 53j1as3TELlefYfXX3pSwPVquSd4Owf4fy+ogdG1xcv4eIuyuoAktjx/FAxMQOZ5kO0m hTli8kJwv5BNoNKfsvyOaTvGh/RnsOOqmRyw0fePUuRDprVUX+q1iQ01Hr+1mt9S9Upl bS4xlpdMvFmTcDnXQY3kWC1sqQOeEeCq47Is6fdmpiWO1Gi9MuQ4tGYkjZ5OEHaZh5Lb ScS0EB87rursp49w8xKEpOQ3VuumYT4CHB78vlHyb16qmO6EjS0uBQK6gL5dHnD63GNT FqSg== X-Gm-Message-State: APjAAAUJ4ZW5ZEMv+BiS454x+VdiZTAAJF1OmJjckhTd50Sr154SycIt mla0ot9vPir2iEoXCIyXKDVLatYGQQq8pHs= X-Google-Smtp-Source: APXvYqwWgCs0ldl/mpHZIh41BsP9PFiTHrfRcMpUcfAnsV6RUvw3NVGk2Tr4lo80Ii1068Ec6BwkBVsREfj80uw= X-Received: by 2002:a65:64d5:: with SMTP id t21mr21593132pgv.310.1561163699545; Fri, 21 Jun 2019 17:34:59 -0700 (PDT) Date: Fri, 21 Jun 2019 17:34:47 -0700 In-Reply-To: <20190622003449.33707-1-saravanak@google.com> Message-Id: <20190622003449.33707-3-saravanak@google.com> Mime-Version: 1.0 References: <20190622003449.33707-1-saravanak@google.com> X-Mailer: git-send-email 2.22.0.410.gd8fdbe21b5-goog Subject: [PATCH v1 2/3] 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 , 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 74c7bdc6f463..4f7870bffbf8 100644 --- a/drivers/opp/core.c +++ b/drivers/opp/core.c @@ -1830,6 +1830,60 @@ void dev_pm_opp_put_genpd_virt_dev(struct opp_table *opp_table, dev_err(virt_dev, "Failed to find required device entry\n"); } +/** + * 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 b150fe97ce5a..bc5c68bdfc8d 100644 --- a/include/linux/pm_opp.h +++ b/include/linux/pm_opp.h @@ -134,6 +134,9 @@ void dev_pm_opp_unregister_set_opp_helper(struct opp_table *opp_table); struct opp_table *dev_pm_opp_set_genpd_virt_dev(struct device *dev, struct device *virt_dev, int index); void dev_pm_opp_put_genpd_virt_dev(struct opp_table *opp_table, struct device *virt_dev); 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); @@ -307,6 +310,14 @@ 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;