From mboxrd@z Thu Jan 1 00:00:00 1970 From: Viresh Kumar Subject: Re: [PATCH V4 1/9] PM / OPP: Allow OPP table to be used for power-domains Date: Fri, 28 Apr 2017 10:30:29 +0530 Message-ID: <20170428050029.GD21517@vireshk-i7> References: <0a7146f9-72f1-317c-3aab-770a72462968@arm.com> <20170413053736.GM5910@vireshk-i7> <3adbef6a-7b43-528f-e88f-c2121d30a5d3@arm.com> <20170417052758.GF28191@vireshk-i7> <95aa4b97-4e1a-13bb-f4d8-982b778012ba@arm.com> <9cd9287c-392b-d3ca-db7d-75c49287448e@codeaurora.org> <20170426135532.ryrh276znet5yvks@sirena.org.uk> <9019aebe-95ba-b1b8-65a9-5be927934218@codeaurora.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Received: from mail-pf0-f169.google.com ([209.85.192.169]:36123 "EHLO mail-pf0-f169.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1162846AbdD1FAd (ORCPT ); Fri, 28 Apr 2017 01:00:33 -0400 Received: by mail-pf0-f169.google.com with SMTP id 194so43372465pfv.3 for ; Thu, 27 Apr 2017 22:00:33 -0700 (PDT) Content-Disposition: inline In-Reply-To: <9019aebe-95ba-b1b8-65a9-5be927934218@codeaurora.org> Sender: linux-pm-owner@vger.kernel.org List-Id: linux-pm@vger.kernel.org To: Sudeep Holla , Rajendra Nayak Cc: Mark Brown , Rafael Wysocki , ulf.hansson@linaro.org, Kevin Hilman , Viresh Kumar , Nishanth Menon , Stephen Boyd , linaro-kernel@lists.linaro.org, linux-pm@vger.kernel.org, linux-kernel@vger.kernel.org, Vincent Guittot , robh+dt@kernel.org, lina.iyer@linaro.org, devicetree@vger.kernel.org On 27-04-17, 16:20, Rajendra Nayak wrote: > > On 04/27/2017 03:12 PM, Sudeep Holla wrote: > [].. > > >> > >>> At qualcomm, we have an external M3 core (running its own firmware) which controls > >>> a few voltage rails (including AVS on those). The devices vote for the voltage levels > > > > Thanks for explicitly mentioning this, but ... > > > >>> (or performance levels) they need by passing an integer value to the M3 (not actual > > > > you contradict here, is it just voltage or performance(i.e. frequency) > > or both ? We need clarity there to choose the right representation. > > Its just voltage. Right. Its just voltage in this case, but we can't speak of future platforms here and we have to consider this thing as an operating performance point only. I still think that this thread is moving in the right direction, specially after V6 which looks much better. If we have anything strong against the way V6 is trying to solve it, I want to talk about it right now and get inputs from all the parties involved. Scrapping all this work is fine, but I would like to do it ASAP in that case :) -- viresh