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Wed, 3 Mar 2021 09:22:21 +0000 (GMT) From: "Kiwoong Kim" To: , Subject: About SD initialization at resume time Date: Wed, 3 Mar 2021 18:22:21 +0900 Message-ID: <000001d7100e$b7380f50$25a82df0$@samsung.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Mailer: Microsoft Outlook 16.0 Thread-Index: AdcQDiu8DmibM2nsTySDHbARn+3GAA== Content-Language: ko X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFnrDKsWRmVeSWpSXmKPExsWy7bCmqa5fqH2CQfM6dYsj//sZLY6vDXdg 8rhzbQ+bx+dNcgFMUTk2GamJKalFCql5yfkpmXnptkrewfHO8aZmBoa6hpYW5koKeYm5qbZK Lj4Bum6ZOUDTlRTKEnNKgUIBicXFSvp2NkX5pSWpChn5xSW2SqkFKTkFhoYFesWJucWleel6 yfm5VoYGBkamQJUJORmtu/cxFvxjrbj0aRJrA+Mdli5GTg4JAROJjxfPM3YxcnEICexglPj+ oY8RJCEk8IlR4tZREYjEZ0aJV02T2WE6rl/bC9Wxi1Gio2sDE4TzglHi4afHbCBVbALaEtMe 7mYFsUUELCUuXTkM1MHBISygL7GsxxAkzCKgIvHozF2wM3iBSs51fGaDsAUlTs58AhZnBhqz bOFrZojFChI/ny5jBRkjIqAnsbDLE6JERGJ2ZxszyAkSAqvYJR6s2swKUe8iMW36LUYIW1ji 1fEtUA9ISbzsb4Oy6yX2TW1ghWjuYZR4uu8fVIOxxKxn7WA3MwtoSqzfpQ9iSggoSxy5BXUa n0TH4b/sEGFeiY42IYhGZYlfkyZDDZGUmHnzDtQmD4nFr86DlQsJxEo8mSg8gVFhFpJ/ZyH5 dxaSx2YhnLCAkWUVo1hqQXFuemqxUYEJckxvYgQnOy2PHYyz337QO8TIxMF4iFGCg1lJhFf8 pW2CEG9KYmVValF+fFFpTmrxIUZTYAxMZJYSTc4Hptu8knhDUyMzMwNLUwtTMyMLJXHeIoMH 8UIC6YklqdmpqQWpRTB9TBycUg1M24J/G5bd/ZjDfViDoW6isnxLhNrBS0udAgQMP17lfHRl 8zbn/5v6bh+8ZLdo76RCvr1H9lZKntz/z/tmwfyNLw9PCKj56hscVK5zoamq9pHJ+vN7p3ny HJu5Zf3fdYFvXE1d+Ku4L+3IP5uV3jerwvdn/pbHcxKSfV3DpZwvPj+Xe3zR9d2fIs89fSu1 Umrq+f67N/vFDnQe/7FK8uSu99Hi/GIq7vbnve3U48+Unf0UV/jL93oYw/Xes8Vq7u0ruoJX FNy4NaF9ovWrtFyFmhg17Shb3Rq2NMXQzPhCo8UT++aosVnp/5qjkNeQath/WWN9ya2JL8KY LhyTTmD7pHktR3xzldK9uw/4f2b5KbEUZyQaajEXFScCACj6iFn/AwAA X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFtrELMWRmVeSWpSXmKPExsWy7bCSvK5fqH2CwbTTbBZH/vczWhxfG+7A 5HHn2h42j8+b5AKYorhsUlJzMstSi/TtErgydr3Yw1jwj7Vi9/vDbA2Md1i6GDk5JARMJK5f 28sIYgsJ7GCUWDk/BCIuKXFi53NGCFtY4n7LEVaImmeMEkdvOYLYbALaEtMe7gaLiwhYS2zY PY+pi5GDQ1hAX2JZjyFImEVAReLRmbtgq3gFLCXOdXxmg7AFJU7OfAIWZwYa8/TmUzh72cLX zBBrFSR+Pl3GCjJSREBPYmGXJ0SJiMTszjbmCYwCs5BMmoVk0iwkk2YhaVnAyLKKUTK1oDg3 PbfYsMAoL7Vcrzgxt7g0L10vOT93EyM4WLW0djDuWfVB7xAjEwfjIUYJDmYlEV7xl7YJQrwp iZVVqUX58UWlOanFhxilOViUxHkvdJ2MFxJITyxJzU5NLUgtgskycXBKNTCpvfry+0zpzo/l wlEz31mvm74sod29Sbz1kP4b1SgDp01sZ7eJrNVS27q3Ncl38tdJpQqpL52tLaxS2kt/ZMw3 bHFtlPrmVMesXvFVZJuwor2VKKfHDP5OwdklX69f7j+d9Mr5fZkH+8wl9m2+zL+MG87u25z7 bc+DZJXu61qPbT7vONLLqKo0YbU/S8HiH3fYdJN/KizcF57j4s0QzuWbyyDQ73J+X3LUuQtB ifvndazeELbzXtaHKW80/a7qiDzLuLqM/WxOBHdi+8pv0dN3XL3/yHtdisurQ4tlEh8fjmDd YRD2yc2wudSg7uz7A4pGsxy/nalfGXzRYbb9xXmWE/yl1s9ffOBN8RbH5nglluKMREMt5qLi RACq/CnpxQIAAA== X-CMS-MailID: 20210303092222epcas2p11fbb2697a53b54dbc138d741893c9f07 X-Msg-Generator: CA Content-Type: text/plain; charset="utf-8" X-Sendblock-Type: AUTO_CONFIDENTIAL CMS-TYPE: 102P DLP-Filter: Pass X-CFilter-Loop: Reflected X-CMS-RootMailID: 20210303092222epcas2p11fbb2697a53b54dbc138d741893c9f07 References: Precedence: bulk List-ID: X-Mailing-List: linux-mmc@vger.kernel.org Dear all I hope opinions from you guys. For many users of mobile device, there is a possibility that issuing no IO = request to a SD card is rare during much of the device's lifetime. Obviously the symptom would happen frequently among system suspend times, t= oo. In this situation, doing SD initialization at every system resume leads to = long latency and can make the users feel it, even when there is no IO request during the= period, when a hardware architecture requires re-initialization at resume time. This is what had actually happened and was fixed with some code in commerci= al products. Is there any way to avoid that symptom w/o any code change? With no way, I hope to make soemthing to improve it. Thanks. Kiwoong Kim