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[23.128.96.18]) by mx.google.com with ESMTP id 4si488357ejr.686.2021.07.07.17.24.51; Wed, 07 Jul 2021 17:25:19 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18; Authentication-Results: mx.google.com; dkim=pass header.i=@chromium.org header.s=google header.b=VtqVdY9l; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=chromium.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230019AbhGHAZ7 (ORCPT + 99 others); Wed, 7 Jul 2021 20:25:59 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:59906 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230099AbhGHAZ6 (ORCPT ); Wed, 7 Jul 2021 20:25:58 -0400 Received: from mail-oi1-x22d.google.com (mail-oi1-x22d.google.com [IPv6:2607:f8b0:4864:20::22d]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 86833C061574 for ; Wed, 7 Jul 2021 17:23:17 -0700 (PDT) Received: by mail-oi1-x22d.google.com with SMTP id w127so5656300oig.12 for ; Wed, 07 Jul 2021 17:23:17 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; h=mime-version:in-reply-to:references:from:user-agent:date:message-id :subject:to:cc; bh=RbFoIrsFO5XIBA5/R77ovrZzmwL+AynSzkgJ2f7jhfU=; b=VtqVdY9lPfx6/Yhz6fJsozfP0L7QK8deW47mn5HtSUTeVi/BXaHkwcRUuSetNMFuv+ x8Yhrjnke5Up7Wi7q3tBV3KbOYQAFsMdgx+87cNXyxc2Lu5XMxJMTGbDkxE03etTMIXo b6Imw0lJLHvtX3T/tUGCAOwUqIA+SEgiKShfw= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:in-reply-to:references:from :user-agent:date:message-id:subject:to:cc; bh=RbFoIrsFO5XIBA5/R77ovrZzmwL+AynSzkgJ2f7jhfU=; b=aHwetxg+eXAGfjSU9pYLo1JM8l8q2CWVK1/w18NJnTEVICedjHixby12N363pS2Slp i6bBH6I7Twgv6aW12HcEDaWXgiedaBPd6CoqAIX7IfuQjxNlRAGgH7UDTfeIOmvCSklh m77BZi/MUN+nuQz/CLap2snv6Hn0ntvC0MQZrJ7nAERfVYsKCjvb8Sks23lkV5SQ2U8c VQLVI5fnZzls8IPyfbCyJ8FdjcxMsiKdmj/OEU0KQckhQzQPCNrqd5aZlc1YNrUR5/FF X7ke99WM3A8opAa8yuDZry63b7TICdbOW1EHT7Tm8wpS21fRcga0X/r6h7kvjF4LF2Ur H1sg== X-Gm-Message-State: AOAM53223S4pJDEpSg80fq+i73Y9LeQQhqJaWRHD2ME5u6mq2CBqSnyi R+/1LPqAMyFZryCdkJRGhbL2nAWKiEuqAU0cS/+u/Q== X-Received: by 2002:aca:3012:: with SMTP id w18mr1495720oiw.125.1625703796995; Wed, 07 Jul 2021 17:23:16 -0700 (PDT) Received: from 753933720722 named unknown by gmailapi.google.com with HTTPREST; Thu, 8 Jul 2021 00:23:16 +0000 MIME-Version: 1.0 In-Reply-To: <20210703025449.2687201-1-bjorn.andersson@linaro.org> References: <20210703025449.2687201-1-bjorn.andersson@linaro.org> From: Stephen Boyd User-Agent: alot/0.9.1 Date: Thu, 8 Jul 2021 00:23:16 +0000 Message-ID: Subject: Re: [RESEND PATCH 2/2] soc: qcom: rpmhpd: Make power_on actually enable the domain To: Andy Gross , Bjorn Andersson , Dmitry Baryshkov , Rajendra Nayak , Ulf Hansson Cc: linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Quoting Bjorn Andersson (2021-07-02 19:54:49) > 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. s/turn/turned/ > > 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 > --- Reviewed-by: Stephen Boyd