From mboxrd@z Thu Jan 1 00:00:00 1970 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=-15.3 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,NICE_REPLY_A,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED, USER_AGENT_SANE_1 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 EBA08C07E9C for ; Wed, 14 Jul 2021 09:23:17 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id D3D5461369 for ; Wed, 14 Jul 2021 09:23:17 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S238833AbhGNJ0I (ORCPT ); Wed, 14 Jul 2021 05:26:08 -0400 Received: from m43-7.mailgun.net ([69.72.43.7]:53188 "EHLO m43-7.mailgun.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S238463AbhGNJ0H (ORCPT ); Wed, 14 Jul 2021 05:26:07 -0400 DKIM-Signature: a=rsa-sha256; v=1; c=relaxed/relaxed; d=mg.codeaurora.org; q=dns/txt; s=smtp; t=1626254596; h=Content-Transfer-Encoding: Content-Type: In-Reply-To: MIME-Version: Date: Message-ID: From: References: Cc: To: Subject: Sender; bh=PYhTm1oU9gXWfNpxNyiWJSeNsaqi/RZ1KyE0TF1OG+w=; b=j689kVKf9FgTFrFR1WVU0U02UrOKaZuOjIZouwL/77wE700HRby6L7Hg43VdsFq4tz/cIUue 3CnVEk5vAqcNuK5F5KlMkUZA5MmRUljvSgCC+4NzBN6c039MW3xf/uYdvmxW37Ocz2nbLCNn 9V9K0McjPA/YaaJzr6Copg4KtK0= X-Mailgun-Sending-Ip: 69.72.43.7 X-Mailgun-Sid: WyI1MzIzYiIsICJsaW51eC1hcm0tbXNtQHZnZXIua2VybmVsLm9yZyIsICJiZTllNGEiXQ== Received: from smtp.codeaurora.org (ec2-35-166-182-171.us-west-2.compute.amazonaws.com [35.166.182.171]) by smtp-out-n04.prod.us-west-2.postgun.com with SMTP id 60eeacec1d1afe585e0be234 (version=TLS1.2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256); Wed, 14 Jul 2021 09:22:52 GMT Sender: rnayak=codeaurora.org@mg.codeaurora.org Received: by smtp.codeaurora.org (Postfix, from userid 1001) id 6A771C43143; Wed, 14 Jul 2021 09:22:52 +0000 (UTC) Received: from [10.50.2.235] (blr-bdr-fw-01_GlobalNAT_AllZones-Outside.qualcomm.com [103.229.18.19]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) (Authenticated sender: rnayak) by smtp.codeaurora.org (Postfix) with ESMTPSA id 00757C4338A; Wed, 14 Jul 2021 09:22:48 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org 00757C4338A 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=fail smtp.mailfrom=rnayak@codeaurora.org Subject: Re: [RESEND PATCH 2/2] soc: qcom: rpmhpd: Make power_on actually enable the domain To: Bjorn Andersson , Andy Gross , Ulf Hansson , Stephen Boyd , Dmitry Baryshkov Cc: linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org References: <20210703025449.2687201-1-bjorn.andersson@linaro.org> From: Rajendra Nayak Message-ID: Date: Wed, 14 Jul 2021 14:52:46 +0530 User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:78.0) Gecko/20100101 Thunderbird/78.11.0 MIME-Version: 1.0 In-Reply-To: <20210703025449.2687201-1-bjorn.andersson@linaro.org> Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org On 7/3/2021 8:24 AM, Bjorn Andersson wrote: > The general expectation is that powering on a power-domain should make > the power domain deliver some power, and if a specific performace state > is needed further requests has to be made. > > But in contrast with other power-domain implementations (e.g. rpmpd) the > RPMh does not have an interface to enable the power, so the driver has > to vote for a particular corner (performance level) in rpmh_power_on(). > > But the corner is never initialized, so a typical request to simply > enable the power domain would not actually turn on the hardware. Further > more, when no more clients vote for a performance state (i.e. the > aggregated vote is 0) the power domain would be turn off. > > Fix both of these issues by always voting for a corner with non-zero > value, when the power domain is enabled. > > The tracking of the lowest non-zero corner is performed to handle the > corner case if there's ever a domain with a non-zero lowest corner, in > which case both rpmh_power_on() and rpmh_rpmhpd_set_performance_state() > would be allowed to use this lowest corner. > > Fixes: 279b7e8a62cc ("soc: qcom: rpmhpd: Add RPMh power domain driver") > Signed-off-by: Bjorn Andersson Did some testing on sc7180 and sc7280 devices, no regressions seen, Reviewed-by: Rajendra Nayak Tested-by: Rajendra Nayak > --- > > Resending because the hunk in rpmhpd_update_level_mapping() was left in the > index. > > drivers/soc/qcom/rpmhpd.c | 18 ++++++++++++++---- > 1 file changed, 14 insertions(+), 4 deletions(-) > > diff --git a/drivers/soc/qcom/rpmhpd.c b/drivers/soc/qcom/rpmhpd.c > index fa209b479ab3..76ea6b053ef0 100644 > --- a/drivers/soc/qcom/rpmhpd.c > +++ b/drivers/soc/qcom/rpmhpd.c > @@ -30,6 +30,7 @@ > * @active_only: True if it represents an Active only peer > * @corner: current corner > * @active_corner: current active corner > + * @enable_corner: lowest non-zero corner > * @level: An array of level (vlvl) to corner (hlvl) mappings > * derived from cmd-db > * @level_count: Number of levels supported by the power domain. max > @@ -47,6 +48,7 @@ struct rpmhpd { > const bool active_only; > unsigned int corner; > unsigned int active_corner; > + unsigned int enable_corner; > u32 level[RPMH_ARC_MAX_LEVELS]; > size_t level_count; > bool enabled; > @@ -385,13 +387,13 @@ static int rpmhpd_aggregate_corner(struct rpmhpd *pd, unsigned int corner) > static int rpmhpd_power_on(struct generic_pm_domain *domain) > { > struct rpmhpd *pd = domain_to_rpmhpd(domain); > - int ret = 0; > + unsigned int corner; > + int ret; > > mutex_lock(&rpmhpd_lock); > > - if (pd->corner) > - ret = rpmhpd_aggregate_corner(pd, pd->corner); > - > + corner = max(pd->corner, pd->enable_corner); > + ret = rpmhpd_aggregate_corner(pd, corner); > if (!ret) > pd->enabled = true; > > @@ -436,6 +438,10 @@ static int rpmhpd_set_performance_state(struct generic_pm_domain *domain, > i--; > > if (pd->enabled) { > + /* Ensure that the domain isn't turn off */ > + if (i < pd->enable_corner) > + i = pd->enable_corner; > + > ret = rpmhpd_aggregate_corner(pd, i); > if (ret) > goto out; > @@ -472,6 +478,10 @@ static int rpmhpd_update_level_mapping(struct rpmhpd *rpmhpd) > for (i = 0; i < rpmhpd->level_count; i++) { > rpmhpd->level[i] = buf[i]; > > + /* Remember the first non-zero corner */ > + if (!rpmhpd->enable_corner) > + rpmhpd->enable_corner = i; > + > /* > * The AUX data may be zero padded. These 0 valued entries at > * the end of the map must be ignored. > -- QUALCOMM INDIA, on behalf of Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, hosted by The Linux Foundation