[PATCH 1/2] ARM: EXYNOS: Support Suspend-to-RAM on EXYNOS5420

Tomasz Figa
2013-12-20T21:23:41Z

On Friday 20 of December 2013 13:22:06 Olof Johansson wrote:
> On Fri, Dec 20, 2013 at 3:38 AM, Abhilash Kesavan
> <kesavan.abhilash@gmail.com> wrote:
> > Hi Sunil,
> >
> > On Fri, Dec 20, 2013 at 3:56 PM, sunil joshi <sjoshi.open@gmail.com> wrote:
> >> Hi Abhilash,
> >> I saw another patch in chrome tree ..by Andrew Bresticker
> >> which may be relevant here ..
> >>
> >> Just wondering if you missed adding this ? or this is not needed ?
> >> You did not face any issue in getting core to suspend ?
> >
> > This has not been added for Exynos5250 in mainline yet. We did notice
> > that the system would fail to suspend on the rare occasion (~1% of the
> > time on exynos5250) when we repeatedly suspended and resumed the
> > system.
> >
> > I have not run s2r stress tests, but have had no issues suspending the
> > system in my limited testing. We can probably let this be for now as
> > the system would resume fine even on a failed suspend. I will do some
> > stress testing and then post if needed.
>
> Hold on, you're claiming that this patch you've posted has only seen
> very limited testing, and that you are aware of failures?
>
> Don't merge known-broken code into the mainline kernel.

I'm afraid that a "failed suspend" does not really mean a failure here,
but let me wait for clarification of things I asked in another part of
this thread.

Best regards,
Tomasz