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Date: Wed, 29 Mar 2017 18:36:39 +0800 From: Chaotian Jing <chaotian.jing@...iatek.com> To: Ulf Hansson <ulf.hansson@...aro.org> CC: Adrian Hunter <adrian.hunter@...el.com>, Matthias Brugger <matthias.bgg@...il.com>, Jaehoon Chung <jh80.chung@...sung.com>, Shawn Lin <shawn.lin@...k-chips.com>, Masahiro Yamada <yamada.masahiro@...ionext.com>, "linux-mmc@...r.kernel.org" <linux-mmc@...r.kernel.org>, "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>, "linux-arm-kernel@...ts.infradead.org" <linux-arm-kernel@...ts.infradead.org>, <linux-mediatek@...ts.infradead.org>, srv_heupstream <srv_heupstream@...iatek.com> Subject: Re: [PATCH] mmc: core: Do not hold re-tuning during CMD6 commands On Wed, 2017-03-29 at 12:33 +0200, Ulf Hansson wrote: > [...] > > >> Below is the fail log of suspend fail. > >> the normal command tune result should be 0xffffff9ff, but some time, we > >> get the tune result of 0xffffffff, then we choose the 10 as the best > >> tune parameter, which is not stable. > >> I know that we should focus on why we get the result of 0xffffffff, this > >> may be result of device/host timing shifting while tuning. but what I > >> want to do is that when get a response CRC error, we can do re-tune to > >> recovery it, but not only return the -84 and cause suspend fail > >> eventually. if all hardware are perfect, then we don't need the re-tune > >> mechanism. > > > > Thanks for elaborating! > > > > Can you please also tell exactly which of the CMD6 commands in the > > suspend sequence that is triggering this problem? Cache flush? Power > > off notification? > > You didn't answer this question. I would really like to know the > sequence of the commands you see that are being sent to the card > during suspend. And of course in particular what command that fails. > Sorry, it's cache flush. I assume that you have noticed the fail log(it shows that cache flush error) > [...] > > Kind regards > Uffe
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