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[109.252.192.57]) by smtp.googlemail.com with ESMTPSA id 20sm708668lfd.237.2020.12.17.13.56.14 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 17 Dec 2020 13:56:15 -0800 (PST) Subject: Re: [PATCH v2 47/48] ARM: tegra: ventana: Support CPU voltage scaling and thermal throttling To: Daniel Lezcano , Thierry Reding , Jonathan Hunter , Mark Brown , Liam Girdwood , Ulf Hansson , Mauro Carvalho Chehab , Rob Herring , Peter Geis , Nicolas Chauvet , Krzysztof Kozlowski , "Rafael J. Wysocki" , Kevin Hilman , Peter De Schrijver , Viresh Kumar , Stephen Boyd , Michael Turquette Cc: devel@driverdev.osuosl.org, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-media@vger.kernel.org, linux-tegra@vger.kernel.org, linux-clk@vger.kernel.org References: <20201217180638.22748-1-digetx@gmail.com> <20201217180638.22748-48-digetx@gmail.com> <91139f8b-0b83-dd8a-ba53-8e7a499e6344@linaro.org> <776e0e84-e395-2bfb-f1ee-c34864b1cf16@linaro.org> <6afaf91c-d0ce-265d-4b71-0ea8da19918b@linaro.org> From: Dmitry Osipenko Message-ID: Date: Fri, 18 Dec 2020 00:56:14 +0300 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.4.2 MIME-Version: 1.0 In-Reply-To: <6afaf91c-d0ce-265d-4b71-0ea8da19918b@linaro.org> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-tegra@vger.kernel.org 18.12.2020 00:19, Daniel Lezcano пишет: > On 17/12/2020 21:28, Dmitry Osipenko wrote: >> 17.12.2020 22:36, Daniel Lezcano пишет: >>>>>> + type = "critical"; >>>>>> + }; >>>>>> + }; >>>>>> + >>>>>> + cooling-maps { >>>>>> + map0 { >>>>>> + trip = <&trip0>; >>>>>> + cooling-device = <&cpu0 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>; >>>>> You should add all CPUs here. >>>> >>>> All CPU cores are coupled on Tegra in regards to CPUFreq, hence I think >>>> it won't make any difference if secondary CPU cores will be added here, >>>> isn't it? >>> The explanation is in the description of commit ef4734500407ce4d >> >> I think that really only makes sense if CPU cores have independent clock >> rate management. > > ATM I did not see any ARM platform having a clock line per CPU but I may > be wrong. > >> IIRC, I actually made some research about this in the >> past and intentionally removed the secondary cores from the >> cooling-device since they didn't make any difference for a coupled CPU >> cores. >> >> That commit also says: >> >> "But as soon as this CPU ordering changes and any other CPU is used to >> bring up the cooling device, we will start seeing failures." >> >> I don't quite understand to what "failures" that commit referrers. I >> tried to change the cpu0 to cpu1 in the cooling-device and don't see any >> failures. Could you please clarify this? >> >> In general it should be fine to add all the cores to the cooling-device >> and I'll do it in v3, but I want to make it clear why this is needed. > > AFAIR, if CPU0 is unplugged the cooling device can not rebind to CPU1. > And if CPU0 is plugged in again, the cooling device fails to initialize. > > And, if the CPUs are mapped with the physical CPU0 to Linux numbering > CPU1, the cooling device mapping will fail. Alright, thank you. 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[109.252.192.57]) by smtp.googlemail.com with ESMTPSA id 20sm708668lfd.237.2020.12.17.13.56.14 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 17 Dec 2020 13:56:15 -0800 (PST) Subject: Re: [PATCH v2 47/48] ARM: tegra: ventana: Support CPU voltage scaling and thermal throttling To: Daniel Lezcano , Thierry Reding , Jonathan Hunter , Mark Brown , Liam Girdwood , Ulf Hansson , Mauro Carvalho Chehab , Rob Herring , Peter Geis , Nicolas Chauvet , Krzysztof Kozlowski , "Rafael J. Wysocki" , Kevin Hilman , Peter De Schrijver , Viresh Kumar , Stephen Boyd , Michael Turquette References: <20201217180638.22748-1-digetx@gmail.com> <20201217180638.22748-48-digetx@gmail.com> <91139f8b-0b83-dd8a-ba53-8e7a499e6344@linaro.org> <776e0e84-e395-2bfb-f1ee-c34864b1cf16@linaro.org> <6afaf91c-d0ce-265d-4b71-0ea8da19918b@linaro.org> From: Dmitry Osipenko Message-ID: Date: Fri, 18 Dec 2020 00:56:14 +0300 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.4.2 MIME-Version: 1.0 In-Reply-To: <6afaf91c-d0ce-265d-4b71-0ea8da19918b@linaro.org> Content-Language: en-US X-BeenThere: driverdev-devel@linuxdriverproject.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux Driver Project Developer List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: devel@driverdev.osuosl.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-tegra@vger.kernel.org, linux-clk@vger.kernel.org, linux-media@vger.kernel.org Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Errors-To: driverdev-devel-bounces@linuxdriverproject.org Sender: "devel" MTguMTIuMjAyMCAwMDoxOSwgRGFuaWVsIExlemNhbm8g0L/QuNGI0LXRgjoKPiBPbiAxNy8xMi8y MDIwIDIxOjI4LCBEbWl0cnkgT3NpcGVua28gd3JvdGU6Cj4+IDE3LjEyLjIwMjAgMjI6MzYsIERh bmllbCBMZXpjYW5vINC/0LjRiNC10YI6Cj4+Pj4+PiArCQkJCQl0eXBlID0gImNyaXRpY2FsIjsK Pj4+Pj4+ICsJCQkJfTsKPj4+Pj4+ICsJCQl9Owo+Pj4+Pj4gKwo+Pj4+Pj4gKwkJCWNvb2xpbmct bWFwcyB7Cj4+Pj4+PiArCQkJCW1hcDAgewo+Pj4+Pj4gKwkJCQkJdHJpcCA9IDwmdHJpcDA+Owo+ Pj4+Pj4gKwkJCQkJY29vbGluZy1kZXZpY2UgPSA8JmNwdTAgVEhFUk1BTF9OT19MSU1JVCBUSEVS TUFMX05PX0xJTUlUPjsKPj4+Pj4gWW91IHNob3VsZCBhZGQgYWxsIENQVXMgaGVyZS4KPj4+Pgo+ Pj4+IEFsbCBDUFUgY29yZXMgYXJlIGNvdXBsZWQgb24gVGVncmEgaW4gcmVnYXJkcyB0byBDUFVG cmVxLCBoZW5jZSBJIHRoaW5rCj4+Pj4gaXQgd29uJ3QgbWFrZSBhbnkgZGlmZmVyZW5jZSBpZiBz ZWNvbmRhcnkgQ1BVIGNvcmVzIHdpbGwgYmUgYWRkZWQgaGVyZSwKPj4+PiBpc24ndCBpdD8KPj4+ IFRoZSBleHBsYW5hdGlvbiBpcyBpbiB0aGUgZGVzY3JpcHRpb24gb2YgY29tbWl0IGVmNDczNDUw MDQwN2NlNGQKPj4KPj4gSSB0aGluayB0aGF0IHJlYWxseSBvbmx5IG1ha2VzIHNlbnNlIGlmIENQ VSBjb3JlcyBoYXZlIGluZGVwZW5kZW50IGNsb2NrCj4+IHJhdGUgbWFuYWdlbWVudC4gCj4gCj4g QVRNIEkgZGlkIG5vdCBzZWUgYW55IEFSTSBwbGF0Zm9ybSBoYXZpbmcgYSBjbG9jayBsaW5lIHBl ciBDUFUgYnV0IEkgbWF5Cj4gYmUgd3JvbmcuCj4gCj4+IElJUkMsIEkgYWN0dWFsbHkgbWFkZSBz b21lIHJlc2VhcmNoIGFib3V0IHRoaXMgaW4gdGhlCj4+IHBhc3QgYW5kIGludGVudGlvbmFsbHkg cmVtb3ZlZCB0aGUgc2Vjb25kYXJ5IGNvcmVzIGZyb20gdGhlCj4+IGNvb2xpbmctZGV2aWNlIHNp bmNlIHRoZXkgZGlkbid0IG1ha2UgYW55IGRpZmZlcmVuY2UgZm9yIGEgY291cGxlZCBDUFUKPj4g Y29yZXMuCj4+Cj4+IFRoYXQgY29tbWl0IGFsc28gc2F5czoKPj4KPj4gIkJ1dCBhcyBzb29uIGFz IHRoaXMgQ1BVIG9yZGVyaW5nIGNoYW5nZXMgYW5kIGFueSBvdGhlciBDUFUgaXMgdXNlZCB0bwo+ PiBicmluZyB1cCB0aGUgY29vbGluZyBkZXZpY2UsIHdlIHdpbGwgc3RhcnQgc2VlaW5nIGZhaWx1 cmVzLiIKPj4KPj4gSSBkb24ndCBxdWl0ZSB1bmRlcnN0YW5kIHRvIHdoYXQgImZhaWx1cmVzIiB0 aGF0IGNvbW1pdCByZWZlcnJlcnMuIEkKPj4gdHJpZWQgdG8gY2hhbmdlIHRoZSBjcHUwIHRvIGNw dTEgaW4gdGhlIGNvb2xpbmctZGV2aWNlIGFuZCBkb24ndCBzZWUgYW55Cj4+IGZhaWx1cmVzLiBD b3VsZCB5b3UgcGxlYXNlIGNsYXJpZnkgdGhpcz8KPj4KPj4gSW4gZ2VuZXJhbCBpdCBzaG91bGQg YmUgZmluZSB0byBhZGQgYWxsIHRoZSBjb3JlcyB0byB0aGUgY29vbGluZy1kZXZpY2UKPj4gYW5k IEknbGwgZG8gaXQgaW4gdjMsIGJ1dCBJIHdhbnQgdG8gbWFrZSBpdCBjbGVhciB3aHkgdGhpcyBp cyBuZWVkZWQuCj4gCj4gQUZBSVIsIGlmIENQVTAgaXMgdW5wbHVnZ2VkIHRoZSBjb29saW5nIGRl dmljZSBjYW4gbm90IHJlYmluZCB0byBDUFUxLgo+IEFuZCBpZiBDUFUwIGlzIHBsdWdnZWQgaW4g YWdhaW4sIHRoZSBjb29saW5nIGRldmljZSBmYWlscyB0byBpbml0aWFsaXplLgo+IAo+IEFuZCwg aWYgdGhlIENQVXMgYXJlIG1hcHBlZCB3aXRoIHRoZSBwaHlzaWNhbCBDUFUwIHRvIExpbnV4IG51 bWJlcmluZwo+IENQVTEsIHRoZSBjb29saW5nIGRldmljZSBtYXBwaW5nIHdpbGwgZmFpbC4KCkFs cmlnaHQsIHRoYW5rIHlvdS4KX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fX18KZGV2ZWwgbWFpbGluZyBsaXN0CmRldmVsQGxpbnV4ZHJpdmVycHJvamVjdC5vcmcK aHR0cDovL2RyaXZlcmRldi5saW51eGRyaXZlcnByb2plY3Qub3JnL21haWxtYW4vbGlzdGluZm8v ZHJpdmVyZGV2LWRldmVsCg== 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=-2.0 required=3.0 tests=BAYES_00,DKIM_ADSP_CUSTOM_MED, DKIM_INVALID,DKIM_SIGNED,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,NICE_REPLY_A,SPF_HELO_NONE, SPF_PASS,URIBL_BLOCKED,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 0248CC4361B for ; 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[109.252.192.57]) by smtp.googlemail.com with ESMTPSA id 20sm708668lfd.237.2020.12.17.13.56.14 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 17 Dec 2020 13:56:15 -0800 (PST) Subject: Re: [PATCH v2 47/48] ARM: tegra: ventana: Support CPU voltage scaling and thermal throttling To: Daniel Lezcano , Thierry Reding , Jonathan Hunter , Mark Brown , Liam Girdwood , Ulf Hansson , Mauro Carvalho Chehab , Rob Herring , Peter Geis , Nicolas Chauvet , Krzysztof Kozlowski , "Rafael J. Wysocki" , Kevin Hilman , Peter De Schrijver , Viresh Kumar , Stephen Boyd , Michael Turquette References: <20201217180638.22748-1-digetx@gmail.com> <20201217180638.22748-48-digetx@gmail.com> <91139f8b-0b83-dd8a-ba53-8e7a499e6344@linaro.org> <776e0e84-e395-2bfb-f1ee-c34864b1cf16@linaro.org> <6afaf91c-d0ce-265d-4b71-0ea8da19918b@linaro.org> From: Dmitry Osipenko Message-ID: Date: Fri, 18 Dec 2020 00:56:14 +0300 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.4.2 MIME-Version: 1.0 In-Reply-To: <6afaf91c-d0ce-265d-4b71-0ea8da19918b@linaro.org> Content-Language: en-US X-Mailman-Approved-At: Fri, 18 Dec 2020 08:31:48 +0000 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: devel@driverdev.osuosl.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-tegra@vger.kernel.org, linux-clk@vger.kernel.org, linux-media@vger.kernel.org Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" MTguMTIuMjAyMCAwMDoxOSwgRGFuaWVsIExlemNhbm8g0L/QuNGI0LXRgjoKPiBPbiAxNy8xMi8y MDIwIDIxOjI4LCBEbWl0cnkgT3NpcGVua28gd3JvdGU6Cj4+IDE3LjEyLjIwMjAgMjI6MzYsIERh bmllbCBMZXpjYW5vINC/0LjRiNC10YI6Cj4+Pj4+PiArCQkJCQl0eXBlID0gImNyaXRpY2FsIjsK Pj4+Pj4+ICsJCQkJfTsKPj4+Pj4+ICsJCQl9Owo+Pj4+Pj4gKwo+Pj4+Pj4gKwkJCWNvb2xpbmct bWFwcyB7Cj4+Pj4+PiArCQkJCW1hcDAgewo+Pj4+Pj4gKwkJCQkJdHJpcCA9IDwmdHJpcDA+Owo+ Pj4+Pj4gKwkJCQkJY29vbGluZy1kZXZpY2UgPSA8JmNwdTAgVEhFUk1BTF9OT19MSU1JVCBUSEVS TUFMX05PX0xJTUlUPjsKPj4+Pj4gWW91IHNob3VsZCBhZGQgYWxsIENQVXMgaGVyZS4KPj4+Pgo+ Pj4+IEFsbCBDUFUgY29yZXMgYXJlIGNvdXBsZWQgb24gVGVncmEgaW4gcmVnYXJkcyB0byBDUFVG cmVxLCBoZW5jZSBJIHRoaW5rCj4+Pj4gaXQgd29uJ3QgbWFrZSBhbnkgZGlmZmVyZW5jZSBpZiBz ZWNvbmRhcnkgQ1BVIGNvcmVzIHdpbGwgYmUgYWRkZWQgaGVyZSwKPj4+PiBpc24ndCBpdD8KPj4+ IFRoZSBleHBsYW5hdGlvbiBpcyBpbiB0aGUgZGVzY3JpcHRpb24gb2YgY29tbWl0IGVmNDczNDUw MDQwN2NlNGQKPj4KPj4gSSB0aGluayB0aGF0IHJlYWxseSBvbmx5IG1ha2VzIHNlbnNlIGlmIENQ VSBjb3JlcyBoYXZlIGluZGVwZW5kZW50IGNsb2NrCj4+IHJhdGUgbWFuYWdlbWVudC4gCj4gCj4g QVRNIEkgZGlkIG5vdCBzZWUgYW55IEFSTSBwbGF0Zm9ybSBoYXZpbmcgYSBjbG9jayBsaW5lIHBl ciBDUFUgYnV0IEkgbWF5Cj4gYmUgd3JvbmcuCj4gCj4+IElJUkMsIEkgYWN0dWFsbHkgbWFkZSBz b21lIHJlc2VhcmNoIGFib3V0IHRoaXMgaW4gdGhlCj4+IHBhc3QgYW5kIGludGVudGlvbmFsbHkg cmVtb3ZlZCB0aGUgc2Vjb25kYXJ5IGNvcmVzIGZyb20gdGhlCj4+IGNvb2xpbmctZGV2aWNlIHNp bmNlIHRoZXkgZGlkbid0IG1ha2UgYW55IGRpZmZlcmVuY2UgZm9yIGEgY291cGxlZCBDUFUKPj4g Y29yZXMuCj4+Cj4+IFRoYXQgY29tbWl0IGFsc28gc2F5czoKPj4KPj4gIkJ1dCBhcyBzb29uIGFz IHRoaXMgQ1BVIG9yZGVyaW5nIGNoYW5nZXMgYW5kIGFueSBvdGhlciBDUFUgaXMgdXNlZCB0bwo+ PiBicmluZyB1cCB0aGUgY29vbGluZyBkZXZpY2UsIHdlIHdpbGwgc3RhcnQgc2VlaW5nIGZhaWx1 cmVzLiIKPj4KPj4gSSBkb24ndCBxdWl0ZSB1bmRlcnN0YW5kIHRvIHdoYXQgImZhaWx1cmVzIiB0 aGF0IGNvbW1pdCByZWZlcnJlcnMuIEkKPj4gdHJpZWQgdG8gY2hhbmdlIHRoZSBjcHUwIHRvIGNw dTEgaW4gdGhlIGNvb2xpbmctZGV2aWNlIGFuZCBkb24ndCBzZWUgYW55Cj4+IGZhaWx1cmVzLiBD b3VsZCB5b3UgcGxlYXNlIGNsYXJpZnkgdGhpcz8KPj4KPj4gSW4gZ2VuZXJhbCBpdCBzaG91bGQg YmUgZmluZSB0byBhZGQgYWxsIHRoZSBjb3JlcyB0byB0aGUgY29vbGluZy1kZXZpY2UKPj4gYW5k IEknbGwgZG8gaXQgaW4gdjMsIGJ1dCBJIHdhbnQgdG8gbWFrZSBpdCBjbGVhciB3aHkgdGhpcyBp cyBuZWVkZWQuCj4gCj4gQUZBSVIsIGlmIENQVTAgaXMgdW5wbHVnZ2VkIHRoZSBjb29saW5nIGRl dmljZSBjYW4gbm90IHJlYmluZCB0byBDUFUxLgo+IEFuZCBpZiBDUFUwIGlzIHBsdWdnZWQgaW4g YWdhaW4sIHRoZSBjb29saW5nIGRldmljZSBmYWlscyB0byBpbml0aWFsaXplLgo+IAo+IEFuZCwg aWYgdGhlIENQVXMgYXJlIG1hcHBlZCB3aXRoIHRoZSBwaHlzaWNhbCBDUFUwIHRvIExpbnV4IG51 bWJlcmluZwo+IENQVTEsIHRoZSBjb29saW5nIGRldmljZSBtYXBwaW5nIHdpbGwgZmFpbC4KCkFs cmlnaHQsIHRoYW5rIHlvdS4KX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fX18KZHJpLWRldmVsIG1haWxpbmcgbGlzdApkcmktZGV2ZWxAbGlzdHMuZnJlZWRlc2t0 b3Aub3JnCmh0dHBzOi8vbGlzdHMuZnJlZWRlc2t0b3Aub3JnL21haWxtYW4vbGlzdGluZm8vZHJp LWRldmVsCg==