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=-2.2 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 autolearn=no 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 862BAC433DF for ; Thu, 18 Jun 2020 08:10:58 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 6951A20706 for ; Thu, 18 Jun 2020 08:10:58 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728447AbgFRIJ0 (ORCPT ); Thu, 18 Jun 2020 04:09:26 -0400 Received: from foss.arm.com ([217.140.110.172]:45672 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728420AbgFRIIq (ORCPT ); Thu, 18 Jun 2020 04:08:46 -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 85FC731B; Thu, 18 Jun 2020 01:08:41 -0700 (PDT) Received: from bogus (unknown [10.37.12.67]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id CC4633F6CF; Thu, 18 Jun 2020 01:08:39 -0700 (PDT) Date: Thu, 18 Jun 2020 09:08:33 +0100 From: Sudeep Holla To: Viresh Kumar Cc: Nicola Mazzucato , linux-kernel@vger.kernel.org, rjw@rjwysocki.net, linux-arm-kernel@lists.infradead.org, linux-pm@vger.kernel.org, lukasz.luba@arm.com, Sudeep Holla Subject: Re: [PATCH 2/2] cpufreq: arm_scmi: Set fast_switch_possible conditionally Message-ID: <20200618080833.GA20559@bogus> References: <20200617094332.8391-1-nicola.mazzucato@arm.com> <20200617094332.8391-2-nicola.mazzucato@arm.com> <20200617124753.GA15211@bogus> <20200618061420.5q7xsldakax2zro5@vireshk-i7> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <20200618061420.5q7xsldakax2zro5@vireshk-i7> User-Agent: Mutt/1.9.4 (2018-02-28) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, Jun 18, 2020 at 11:44:20AM +0530, Viresh Kumar wrote: > On 17-06-20, 13:47, Sudeep Holla wrote: > > This is first step towards avoiding polling based cpufreq set if firmware > > has fast access registers that bypass normal mailbox based messaging. > > > > If you happy with this and provide ack, I will take this along with scmi > > changes via ARM SoC. Hope that is fine by you. > > Sudeep, > > I am not sure how it concerns me frankly :) > Sorry I wasn't clear. > AFAICT, this is enabling fast switch based on some mechanism (internal > to scmi) and so either the cpufreq driver will have fast-switch > enabled or not, and both are fine by the cpufreq core. > Indeed. > And so I am confused on why my Ack is important here :) > Generally ARM SoC team expects a stamp from other subsystem maintainers if they are pulling it. I understand there is more firmware aspect than cpufreq aspect here, but still we may need your stamp to this 😉 for logistic reasons. -- Regards, Sudeep