Messages in this thread | | | Subject | Re: [PATCH] mmc: core: Do not hold re-tuning during CMD6 commands | From | Chaotian Jing <> | Date | Wed, 29 Mar 2017 18:36:39 +0800 |
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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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