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From: James Liao <jamesjj.liao-NuS5LvNUpcJWk0Htik3J/w@public.gmane.org>
To: Kevin Hilman <khilman-rdvid1DuHRBWk0Htik3J/w@public.gmane.org>,
	Sascha Hauer <kernel-bIcnvbaLZ9MEGnE8C9+IrQ@public.gmane.org>
Cc: linux-mediatek-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org,
	Eddie Huang <eddie.huang-NuS5LvNUpcJWk0Htik3J/w@public.gmane.org>,
	Tyler Baker <tyler.baker-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>
Subject: Re: mt8173-evb: failing to boot in linux-next and mainline
Date: Tue, 29 Mar 2016 13:40:15 +0800	[thread overview]
Message-ID: <1459230015.25921.10.camel@mtksdaap41> (raw)
In-Reply-To: <7h37raprav.fsf-rdvid1DuHRBWk0Htik3J/w@public.gmane.org>

Hi Sascha,

On Mon, 2016-03-28 at 08:15 -0700, Kevin Hilman wrote:
> Hi Eddie,
> 
> Eddie Huang <eddie.huang-NuS5LvNUpcJWk0Htik3J/w@public.gmane.org> writes:
> 
> [...]
> 
> > Thanks your testing again. I can reproduce your case in my local
> > environment using 4.6-rc1. After checking, there are two ways to avoid
> > the hang:
> > 1. set clk_ignore_unused to kernel command line
> > 2. Revert patch "cc8ed76 soc: mediatek: SCPSYS: Fix double enabling of
> > regulators"
> >
> > It seems there is a problem between turn on/off clock and power domain.
> > We will try to fix this and send patch to public once have a solution.
> 
> Thanks for verifying.
> 
> I've confirmed that reverting the patch suggested above fixes the
> problem.
> 
> Since -rc1 is out, and this problem still exists in mainline, if a
> proper fix is not found very soon, I suggest reverting that patch in mainline.
> 
> Kevin

According to Eddie and Kevin's test, I think some clocks
(mm/mfg/venc/venclt) may be turned off and there are drivers need these
clocks without clk_prepare_enable(). But I have no idea to find out what
driver causes this issue. So I prefer to revert it on v4.6-rc1. Do you
have comments about this issue?


Best regards,

James

  parent reply	other threads:[~2016-03-29  5:40 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-03-24 18:42 mt8173-evb: failing to boot in linux-next and mainline Kevin Hilman
     [not found] ` <CAOi56cV2M_Ee2AhxTUgHhZuZ1y7LH4sKKyiq3Okorj3K+L15GA-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2016-03-28 11:51   ` Eddie Huang
2016-03-28 15:15     ` Kevin Hilman
     [not found]       ` <7h37raprav.fsf-rdvid1DuHRBWk0Htik3J/w@public.gmane.org>
2016-03-29  5:40         ` James Liao [this message]
2016-04-11 23:12           ` Kevin Hilman
     [not found]             ` <CAOi56cVtfn5BmKP2YHM0kKvCcoAJUmaZWpupODRU4ABE=XEYbQ-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2016-04-13 10:15               ` Matthias Brugger
     [not found]                 ` <570E1C2E.8010203-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2016-04-14 21:58                   ` Kevin Hilman
     [not found]                     ` <CAOi56cUSL-O1_5TC3QuZzUJQASKS8GOvvzXfUU2w1sZGdd6W-g-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2016-04-19 22:57                       ` Kevin Hilman
     [not found]                         ` <CAOi56cW4GjnCCNM_8-83H4gb4NXM2S7QWnmc=oniRGzBZFHMJQ-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2016-04-21  8:06                           ` Eddie Huang

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