linux-kernel - Re: [IMX] [DRM]: suspend/resume support

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Message-ID: <CAOuPNLjrAU_C_TUKFMs1d0eGsw=AxuG6d6FhNHtHFwVhfYZGgA@mail.gmail.com>
Date:   Wed, 19 Jun 2019 20:59:43 +0530
From:   Pintu Agarwal <pintu.ping@...il.com>
To:     Fabio Estevam <festevam@...il.com>
Cc:     open list <linux-kernel@...r.kernel.org>,
        "moderated list:ARM/FREESCALE IMX / MXC ARM ARCHITECTURE" 
        <linux-arm-kernel@...ts.infradead.org>,
        Kernelnewbies <kernelnewbies@...nelnewbies.org>,
        linux-pm@...r.kernel.org
Subject: Re: [IMX] [DRM]: suspend/resume support

On Wed, Jun 19, 2019 at 8:41 PM Fabio Estevam <festevam@...il.com> wrote:
>
> > > Then you can test suspend/resume and see if HDMI hangs or not.
> > >
> > By this suspend/resume, you mean "suspend-to-ram" or "suspend-to-disk" ?
>
> I tested with "echo mem > /sys/power/state"
>
hmm. That's what I said. This is runtime suspend, and it works for me also.
I am talking about hibernation:
# echo disk > /sys/power/state  (with some customization)

> > This scenario is not with suspend/resume.
> > This hang is, when we make hdmi as a loadable module (.ko) and trying
> > to install it after resume.
> > In this case, suspend/resume will not come into picture. Not sure why
> > it still hangs.
> > Do you have any clue for this scenario?
>
> I haven't tried this one.
>
> Please test it with 5.1.11 and if it fails, please report.

Okay will check this on latest kernel. Thanks.