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From: Miquel Raynal <miquel.raynal@bootlin.com>
To: Michael Nazzareno Trimarchi <michael@amarulasolutions.com>
Cc: s.hauer@pengutronix.de, Greg Ungerer <gerg@kernel.org>,
	linux-mtd@lists.infradead.org,
	Boris Brezillon <bbrezillon@kernel.org>
Subject: Re: GPMI iMX6ull timeout on DMA
Date: Mon, 29 Jul 2019 23:02:58 +0200
Message-ID: <20190729230258.4d474d2e@xps13> (raw)
In-Reply-To: <CAOf5uwmd7LFOS0cRWX5ANnmzf0aZWn0RFF_YWkwxtGUjymmMXA@mail.gmail.com>

Hi Michael,

Michael Nazzareno Trimarchi <michael@amarulasolutions.com> wrote on
Mon, 29 Jul 2019 22:00:25 +0200:

> Hi Miquel
> 
> sorry was difficult day ;). My answer below
> 

No pb ;)

[...]

> > > > > > > > That's strange... I don't get what would produce
such unstable issue.  
> > > > > > >
> > > > > > > My initial guess is that the calculated timing is very marginal.  
> > > > > >
> > > > > > What do you mean by "marginal"?
> > > > > >  
> > > > >
> > > > > I don't think that is timing calculation. I have tried to use the same timing
> > > > > as before but when those are applide. Is it possible?  
> > > >
> > > >                                       ^
> > > > I suppose the end of the sentence is missing?  
> >
> > Michael, what did you mean here?
> >  
> commit 02c786627b93b3c3286570f793294816286ff397
> Author: Michael Trimarchi <michael@amarulasolutions.com>
> Date:   Fri Oct 5 09:46:29 2018 +0200
> 
>     Revert "mtd: rawnand: gpmi: use core timings instead of an
> empirical derivation"
> 
>     This reverts commit b1206122069aadabe1a8c50789277a978aaa4df7.
> 
>     Change-Id: Icd0ddcd5e3ac7d82932bbf412299cca424cbc571
>     Jira-Id: WAN-50
>     Signed-off-by: Michael Trimarchi <michael@amarulasolutions.com>
> 
> Revert this one does not fix the problem. Right now I have two revert
> this one and
> 
> commit 6ab543c1924f77957004994bd6806a9daa45f903 (tag: MMI_004_011_R02)
> Author: Michael Trimarchi <michael@amarulasolutions.com>
> Date:   Fri Oct 5 09:46:44 2018 +0200
> 
>     Revert "mtd: rawnand: gpmi: support ->setup_data_interface()"
> 
>     This reverts commit 76e1a0086a0c3276b384f77905345e0fcc886fdd.
> 
>     Change-Id: I60fb6f874364d1deeda3424d4508553a38ac9b1a
>     Jira-Id: WAN-50
>     Signed-off-by: Michael Trimarchi <michael@amarulasolutions.com>
> 
> I did not have time to finish to undestand why this was fixing my problem

Ok so I am pretty convinced that this is still a timings issue then;
but not entirely due to the different timings calculation. Interesting.
I'm waiting for Greg's results now.


Thanks,
Miquèl

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Thread overview: 39+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-07-29  6:41 Greg Ungerer
2019-07-29  8:36 ` Miquel Raynal
2019-07-29  8:42   ` Michael Nazzareno Trimarchi
2019-07-29 12:18     ` Greg Ungerer
2019-07-29 12:20       ` Michael Nazzareno Trimarchi
2019-07-29 12:33   ` Greg Ungerer
2019-07-29 12:47     ` Miquel Raynal
2019-07-29 12:49       ` Michael Nazzareno Trimarchi
2019-07-29 12:55         ` Miquel Raynal
2019-07-29 13:00           ` Michael Nazzareno Trimarchi
2019-07-29 13:22             ` Miquel Raynal
2019-07-29 20:00               ` Michael Nazzareno Trimarchi
2019-07-29 21:02                 ` Miquel Raynal [this message]
2019-07-30  0:28       ` Greg Ungerer
2019-07-30  0:41         ` Greg Ungerer
2019-07-30  6:06           ` Greg Ungerer
2019-07-30  8:38             ` Miquel Raynal
2019-07-30  8:58               ` Boris Brezillon
2019-07-31  2:05               ` Greg Ungerer
2019-07-31  6:28                 ` Boris Brezillon
2019-08-02  7:19                   ` Greg Ungerer
2019-08-02 12:34                   ` Greg Ungerer
2019-08-02 12:51                     ` Boris Brezillon
2019-08-05  5:51                       ` Greg Ungerer
2019-08-07 16:05                         ` Miquel Raynal
2019-08-08  0:43                           ` Greg Ungerer
2019-08-08 16:36                         ` Boris Brezillon
2019-08-09  5:20                           ` Greg Ungerer
2019-08-09  6:23                             ` Boris Brezillon
2019-08-09  6:55                               ` Greg Ungerer
2019-08-09  7:32                                 ` Boris Brezillon
2019-08-09 13:57                                   ` Greg Ungerer
2019-08-09 13:59                                     ` Boris Brezillon
2019-08-12  2:50                                       ` Greg Ungerer
2019-08-12  4:04                                         ` Greg Ungerer
2019-08-12  7:31                                         ` Boris Brezillon
2019-08-13  0:50                                           ` Greg Ungerer
  -- strict thread matches above, loose matches on Subject: below --
2018-10-02 13:22 GPMI IMX6ull timeout on dma Michael Nazzareno Trimarchi
2018-10-04 14:36 ` Michael Nazzareno Trimarchi

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