From patchwork Tue Aug 4 11:46:55 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Rajendra Nayak X-Patchwork-Id: 254106 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=-12.8 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham 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 2AC41C433E1 for ; Tue, 4 Aug 2020 11:47:27 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 129BC20738 for ; Tue, 4 Aug 2020 11:47:27 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (1024-bit key) header.d=mg.codeaurora.org header.i=@mg.codeaurora.org header.b="iAqEuGM9" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730310AbgHDLrZ (ORCPT ); Tue, 4 Aug 2020 07:47:25 -0400 Received: from m43-7.mailgun.net ([69.72.43.7]:55884 "EHLO m43-7.mailgun.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730312AbgHDLrW (ORCPT ); Tue, 4 Aug 2020 07:47:22 -0400 DKIM-Signature: a=rsa-sha256; v=1; c=relaxed/relaxed; d=mg.codeaurora.org; q=dns/txt; s=smtp; t=1596541641; h=References: In-Reply-To: Message-Id: Date: Subject: Cc: To: From: Sender; bh=kv7I/3RRqNOT13X3DGDmONEGT2EBJqW5mZB4sv1aNGA=; b=iAqEuGM9/tbDK++X1kvKNEj6Q2wma0rWWTbj4FTC9stOZQrr2gAysFgITW4TYfBuUyeMSB4O rYO6bip/Zbclfg+62ayoba89fDDk8KlZZgOkvvmrCUHmglx6wg+gX4CVYTy15uQi0DrBhh+R kPXDhao50WAQRtXyXTo6nKhb9IU= X-Mailgun-Sending-Ip: 69.72.43.7 X-Mailgun-Sid: WyI1YmJiNiIsICJkZXZpY2V0cmVlQHZnZXIua2VybmVsLm9yZyIsICJiZTllNGEiXQ== Received: from smtp.codeaurora.org (ec2-35-166-182-171.us-west-2.compute.amazonaws.com [35.166.182.171]) by smtp-out-n17.prod.us-west-2.postgun.com with SMTP id 5f294ac3781ba1c5e2e70558 (version=TLS1.2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256); Tue, 04 Aug 2020 11:47:15 GMT Received: by smtp.codeaurora.org (Postfix, from userid 1001) id 3D8C4C43391; Tue, 4 Aug 2020 11:47:15 +0000 (UTC) Received: from blr-ubuntu-173.qualcomm.com (blr-bdr-fw-01_GlobalNAT_AllZones-Outside.qualcomm.com [103.229.18.19]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-SHA256 (128/128 bits)) (No client certificate requested) (Authenticated sender: rnayak) by smtp.codeaurora.org (Postfix) with ESMTPSA id D8E30C433CB; Tue, 4 Aug 2020 11:47:11 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org D8E30C433CB Authentication-Results: aws-us-west-2-caf-mail-1.web.codeaurora.org; dmarc=none (p=none dis=none) header.from=codeaurora.org Authentication-Results: aws-us-west-2-caf-mail-1.web.codeaurora.org; spf=none smtp.mailfrom=rnayak@codeaurora.org From: Rajendra Nayak To: ulf.hansson@linaro.org, robh+dt@kernel.org, bjorn.andersson@linaro.org Cc: linux-pm@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-msm@vger.kernel.org, Rajendra Nayak Subject: [PATCH 2/3] PM / Domains: Add support for 'assigned-performance-states' Date: Tue, 4 Aug 2020 17:16:55 +0530 Message-Id: <1596541616-27688-3-git-send-email-rnayak@codeaurora.org> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1596541616-27688-1-git-send-email-rnayak@codeaurora.org> References: <1596541616-27688-1-git-send-email-rnayak@codeaurora.org> Sender: devicetree-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org For devices which have 'assigned-performance-states' specified in DT, set the specified performance state during attach and drop it on detach. Also drop/set as part of runtime suspend/resume callbacks. Signed-off-by: Rajendra Nayak --- drivers/base/power/domain.c | 27 +++++++++++++++++++++++++++ include/linux/pm_domain.h | 1 + 2 files changed, 28 insertions(+) diff --git a/drivers/base/power/domain.c b/drivers/base/power/domain.c index 0a01df60..8704823 100644 --- a/drivers/base/power/domain.c +++ b/drivers/base/power/domain.c @@ -810,6 +810,10 @@ static int genpd_runtime_suspend(struct device *dev) if (irq_safe_dev_in_no_sleep_domain(dev, genpd)) return 0; + /* Drop the assigned performance state */ + if (dev_gpd_data(dev)->assigned_pstate) + dev_pm_genpd_set_performance_state(dev, 0); + genpd_lock(genpd); genpd_power_off(genpd, true, 0); genpd_unlock(genpd); @@ -829,6 +833,7 @@ static int genpd_runtime_resume(struct device *dev) { struct generic_pm_domain *genpd; struct gpd_timing_data *td = &dev_gpd_data(dev)->td; + unsigned int assigned_pstate = dev_gpd_data(dev)->assigned_pstate; bool runtime_pm = pm_runtime_enabled(dev); ktime_t time_start; s64 elapsed_ns; @@ -857,6 +862,9 @@ static int genpd_runtime_resume(struct device *dev) if (ret) return ret; + /* Set the assigned performance state */ + if (assigned_pstate) + dev_pm_genpd_set_performance_state(dev, assigned_pstate); out: /* Measure resume latency. */ time_start = 0; @@ -890,6 +898,8 @@ static int genpd_runtime_resume(struct device *dev) err_poweroff: if (!pm_runtime_is_irq_safe(dev) || (pm_runtime_is_irq_safe(dev) && genpd_is_irq_safe(genpd))) { + if (assigned_pstate) + dev_pm_genpd_set_performance_state(dev, 0); genpd_lock(genpd); genpd_power_off(genpd, true, 0); genpd_unlock(genpd); @@ -2405,6 +2415,12 @@ static void genpd_dev_pm_detach(struct device *dev, bool power_off) dev_dbg(dev, "removing from PM domain %s\n", pd->name); + /* Drop the assigned performance state */ + if (dev_gpd_data(dev)->assigned_pstate) { + dev_pm_genpd_set_performance_state(dev, 0); + dev_gpd_data(dev)->assigned_pstate = 0; + } + for (i = 1; i < GENPD_RETRY_MAX_MS; i <<= 1) { ret = genpd_remove_device(pd, dev); if (ret != -EAGAIN) @@ -2442,6 +2458,7 @@ static void genpd_dev_pm_sync(struct device *dev) static int __genpd_dev_pm_attach(struct device *dev, struct device *base_dev, unsigned int index, bool power_on) { + unsigned int assigned_pstate; struct of_phandle_args pd_args; struct generic_pm_domain *pd; int ret; @@ -2485,6 +2502,16 @@ static int __genpd_dev_pm_attach(struct device *dev, struct device *base_dev, if (ret) genpd_remove_device(pd, dev); + /* Set the assigned performance state */ + if (!of_property_read_u32_index(base_dev->of_node, + "assigned-performance-states", + index, &assigned_pstate)) { + if (assigned_pstate) { + dev_pm_genpd_set_performance_state(dev, assigned_pstate); + dev_gpd_data(dev)->assigned_pstate = assigned_pstate; + } + } + return ret ? -EPROBE_DEFER : 1; } diff --git a/include/linux/pm_domain.h b/include/linux/pm_domain.h index 9ec78ee..4a415ee 100644 --- a/include/linux/pm_domain.h +++ b/include/linux/pm_domain.h @@ -180,6 +180,7 @@ struct generic_pm_domain_data { struct notifier_block nb; int cpu; unsigned int performance_state; + unsigned int assigned_pstate; void *data; };