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=-6.8 required=3.0 tests=FREEMAIL_FORGED_FROMDOMAIN, FREEMAIL_FROM,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED 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 18145C28CC2 for ; Wed, 29 May 2019 11:08:48 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id EFDF220B7C for ; Wed, 29 May 2019 11:08:47 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726029AbfE2LIr (ORCPT ); Wed, 29 May 2019 07:08:47 -0400 Received: from ns.iliad.fr ([212.27.33.1]:40620 "EHLO ns.iliad.fr" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725894AbfE2LIr (ORCPT ); Wed, 29 May 2019 07:08:47 -0400 Received: from ns.iliad.fr (localhost [127.0.0.1]) by ns.iliad.fr (Postfix) with ESMTP id 284A22043B; Wed, 29 May 2019 13:08:45 +0200 (CEST) Received: from [192.168.108.49] (freebox.vlq16.iliad.fr [213.36.7.13]) by ns.iliad.fr (Postfix) with ESMTP id 098E920114; Wed, 29 May 2019 13:08:45 +0200 (CEST) Subject: Re: [PATCH v4] arm64: dts: qcom: msm8998: Add PSCI cpuidle low power states From: Marc Gonzalez To: Niklas Cassel , Bjorn Andersson , Amit Kucheria , Rafael Wysocki , Daniel Lezcano Cc: MSM , Linux ARM , PM , Sibi Sankar , Jeffrey Hugo , Andy Gross , Lorenzo Pieralisi , Sudeep Holla References: <346cd9f0-583d-f467-83d0-e73768bf5aac@free.fr> <20190523214619.GB25133@centauri> Message-ID: Date: Wed, 29 May 2019 13:08:44 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.6.1 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit X-Virus-Scanned: ClamAV using ClamSMTP ; ns.iliad.fr ; Wed May 29 13:08:45 2019 +0200 (CEST) Sender: linux-pm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org + linux-pm On 24/05/2019 14:32, Marc Gonzalez wrote: > From: Amit Kucheria > > Add device bindings for cpuidle states for cpu devices. > > [marc: rebase, fix arm,psci-suspend-param, fix entry-latency-us] > Acked-by: Daniel Lezcano > Signed-off-by: Amit Kucheria > Signed-off-by: Marc Gonzalez > --- > Changes from v3: > - Fixup all 4 entry-latency-us (Niklas) > Changes from v2: > - Rebase > - Fixup arm,psci-suspend-param for power-collapse states (otherwise: reboot) > --- > arch/arm64/boot/dts/qcom/msm8998.dtsi | 50 +++++++++++++++++++++++++++ > 1 file changed, 50 insertions(+) > > diff --git a/arch/arm64/boot/dts/qcom/msm8998.dtsi b/arch/arm64/boot/dts/qcom/msm8998.dtsi > index 412195b9794c..ac6bd32c0e7d 100644 > --- a/arch/arm64/boot/dts/qcom/msm8998.dtsi > +++ b/arch/arm64/boot/dts/qcom/msm8998.dtsi > @@ -78,6 +78,7 @@ > compatible = "arm,armv8"; > reg = <0x0 0x0>; > enable-method = "psci"; > + cpu-idle-states = <&LITTLE_CPU_SLEEP_0 &LITTLE_CPU_SLEEP_1>; > next-level-cache = <&L2_0>; > L2_0: l2-cache { > compatible = "arm,arch-cache"; > @@ -96,6 +97,7 @@ > compatible = "arm,armv8"; > reg = <0x0 0x1>; > enable-method = "psci"; > + cpu-idle-states = <&LITTLE_CPU_SLEEP_0 &LITTLE_CPU_SLEEP_1>; > next-level-cache = <&L2_0>; > L1_I_1: l1-icache { > compatible = "arm,arch-cache"; > @@ -110,6 +112,7 @@ > compatible = "arm,armv8"; > reg = <0x0 0x2>; > enable-method = "psci"; > + cpu-idle-states = <&LITTLE_CPU_SLEEP_0 &LITTLE_CPU_SLEEP_1>; > next-level-cache = <&L2_0>; > L1_I_2: l1-icache { > compatible = "arm,arch-cache"; > @@ -124,6 +127,7 @@ > compatible = "arm,armv8"; > reg = <0x0 0x3>; > enable-method = "psci"; > + cpu-idle-states = <&LITTLE_CPU_SLEEP_0 &LITTLE_CPU_SLEEP_1>; > next-level-cache = <&L2_0>; > L1_I_3: l1-icache { > compatible = "arm,arch-cache"; > @@ -138,6 +142,7 @@ > compatible = "arm,armv8"; > reg = <0x0 0x100>; > enable-method = "psci"; > + cpu-idle-states = <&BIG_CPU_SLEEP_0 &BIG_CPU_SLEEP_1>; > next-level-cache = <&L2_1>; > L2_1: l2-cache { > compatible = "arm,arch-cache"; > @@ -156,6 +161,7 @@ > compatible = "arm,armv8"; > reg = <0x0 0x101>; > enable-method = "psci"; > + cpu-idle-states = <&BIG_CPU_SLEEP_0 &BIG_CPU_SLEEP_1>; > next-level-cache = <&L2_1>; > L1_I_101: l1-icache { > compatible = "arm,arch-cache"; > @@ -170,6 +176,7 @@ > compatible = "arm,armv8"; > reg = <0x0 0x102>; > enable-method = "psci"; > + cpu-idle-states = <&BIG_CPU_SLEEP_0 &BIG_CPU_SLEEP_1>; > next-level-cache = <&L2_1>; > L1_I_102: l1-icache { > compatible = "arm,arch-cache"; > @@ -184,6 +191,7 @@ > compatible = "arm,armv8"; > reg = <0x0 0x103>; > enable-method = "psci"; > + cpu-idle-states = <&BIG_CPU_SLEEP_0 &BIG_CPU_SLEEP_1>; > next-level-cache = <&L2_1>; > L1_I_103: l1-icache { > compatible = "arm,arch-cache"; > @@ -230,6 +238,48 @@ > }; > }; > }; > + > + idle-states { > + entry-method = "psci"; > + > + LITTLE_CPU_SLEEP_0: cpu-sleep-0-0 { > + compatible = "arm,idle-state"; > + idle-state-name = "little-retention"; > + arm,psci-suspend-param = <0x00000002>; > + entry-latency-us = <81>; > + exit-latency-us = <86>; > + min-residency-us = <200>; > + }; > + > + LITTLE_CPU_SLEEP_1: cpu-sleep-0-1 { > + compatible = "arm,idle-state"; > + idle-state-name = "little-power-collapse"; > + arm,psci-suspend-param = <0x40000003>; > + entry-latency-us = <273>; > + exit-latency-us = <612>; > + min-residency-us = <1000>; > + local-timer-stop; > + }; > + > + BIG_CPU_SLEEP_0: cpu-sleep-1-0 { > + compatible = "arm,idle-state"; > + idle-state-name = "big-retention"; > + arm,psci-suspend-param = <0x00000002>; > + entry-latency-us = <79>; > + exit-latency-us = <82>; > + min-residency-us = <200>; > + }; > + > + BIG_CPU_SLEEP_1: cpu-sleep-1-1 { > + compatible = "arm,idle-state"; > + idle-state-name = "big-power-collapse"; > + arm,psci-suspend-param = <0x40000003>; > + entry-latency-us = <336>; > + exit-latency-us = <525>; > + min-residency-us = <1000>; > + local-timer-stop; > + }; > + }; Niklas and I have been discussing the min-residency-us prop. https://elixir.bootlin.com/linux/latest/source/Documentation/devicetree/bindings/arm/idle-states.txt I thought a requirement would be min-residency > entry-latency + exit-latency but it doesn't seem to be the case. Do the values proposed here look kosher? Regards.