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[109.252.193.91]) by smtp.googlemail.com with ESMTPSA id t10sm1487311ljj.44.2021.05.14.15.17.42 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Fri, 14 May 2021 15:17:43 -0700 (PDT) Subject: Re: [PATCH v1 03/10] ARM: tegra: acer-a500: Bump thermal trips by 10C To: =?UTF-8?B?TWljaGHFgiBNaXJvc8WCYXc=?= Cc: Thierry Reding , Jonathan Hunter , Agneli , Paul Fertser , Svyatoslav Ryhel , linux-tegra@vger.kernel.org, linux-kernel@vger.kernel.org References: <20210510202600.12156-1-digetx@gmail.com> <20210510202600.12156-4-digetx@gmail.com> <20210514211601.GA1969@qmqm.qmqm.pl> From: Dmitry Osipenko Message-ID: Date: Sat, 15 May 2021 01:17:42 +0300 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.8.1 MIME-Version: 1.0 In-Reply-To: <20210514211601.GA1969@qmqm.qmqm.pl> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 15.05.2021 00:16, Michał Mirosław пишет: > On Mon, May 10, 2021 at 11:25:53PM +0300, Dmitry Osipenko wrote: >> It's possible to hit the temperature of the thermal zone in a very warm >> environment under a constant load, like watching a video using software >> decoding. It's even easier to hit the limit with a slightly overclocked >> CPU. Bump the temperature limit by 10C in order to improve user >> experience. Acer A500 has a large board and 10" display panel which are >> used for the heat dissipation, the SoC is placed far away from battery, >> hence we can safely bump the temperature limit. > > 60^C looks like a touch-safety limit (to avoid burns for users). Did you > verify the touchable parts' temperature somehow after the change? The SoC is placed under a can. Both front and back of device are large metal planes which dissipate heat efficiently. I don't recall A500 getting hot ever and I'm holding it in hands every day. From a user perspective it may feel like a part of device getting slightly warm in a worst case.