From patchwork Fri Oct 2 12:24:16 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Lukasz Luba X-Patchwork-Id: 267023 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=-12.7 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY, 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 DC68FC4363D for ; Fri, 2 Oct 2020 12:24:36 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id B2B8A221F0 for ; Fri, 2 Oct 2020 12:24:36 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2387989AbgJBMYa (ORCPT ); Fri, 2 Oct 2020 08:24:30 -0400 Received: from foss.arm.com ([217.140.110.172]:34560 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2387954AbgJBMY3 (ORCPT ); Fri, 2 Oct 2020 08:24:29 -0400 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 17B6E106F; Fri, 2 Oct 2020 05:24:29 -0700 (PDT) Received: from e123648.arm.com (unknown [10.57.50.3]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id 535E73F70D; Fri, 2 Oct 2020 05:24:27 -0700 (PDT) From: Lukasz Luba To: linux-kernel@vger.kernel.org, linux-pm@vger.kernel.org Cc: daniel.lezcano@linaro.org, amitk@kernel.org, Dietmar.Eggemann@arm.com, lukasz.luba@arm.com Subject: [PATCH 2/2] thermal: power allocator: estimate sustainable power only once Date: Fri, 2 Oct 2020 13:24:16 +0100 Message-Id: <20201002122416.13659-3-lukasz.luba@arm.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20201002122416.13659-1-lukasz.luba@arm.com> References: <20201002122416.13659-1-lukasz.luba@arm.com> Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org The sustainable power value might come from the Device Tree or can be estimated in run time. There is no need to estimate every time when the governor is called and temperature is high. Instead, store the estimated value and make it available via standard sysfs interface so it can be checked from the user-space. Signed-off-by: Lukasz Luba --- drivers/thermal/gov_power_allocator.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/thermal/gov_power_allocator.c b/drivers/thermal/gov_power_allocator.c index f69fafe486a5..dd59085f38f5 100644 --- a/drivers/thermal/gov_power_allocator.c +++ b/drivers/thermal/gov_power_allocator.c @@ -204,6 +204,8 @@ static u32 pid_controller(struct thermal_zone_device *tz, estimate_pid_constants(tz, sustainable_power, params->trip_switch_on, control_temp, true); + /* Do the estimation only once and make available in sysfs */ + tz->tzp->sustainable_power = sustainable_power; } err = control_temp - tz->temperature;