From: Pintu Agarwal <pintu.ping@gmail.com>
To: anish singh <anish198519851985@gmail.com>
Cc: linux-pm@vger.kernel.org,
open list <linux-kernel@vger.kernel.org>,
"moderated list:ARM/FREESCALE IMX / MXC ARM ARCHITECTURE"
<linux-arm-kernel@lists.infradead.org>,
Kernelnewbies <kernelnewbies@kernelnewbies.org>
Subject: Re: interrupt handler not getting called after resume
Date: Mon, 30 Dec 2019 19:20:34 +0530 [thread overview]
Message-ID: <CAOuPNLicwavzWQZAqzyLdc12Rb=yo49QxrRM3Zr0KOGrhCtJpg@mail.gmail.com> (raw)
In-Reply-To: <CAK7N6vrSKM8pU0+gquCu1x52GjBTaqFbwqtj_v8dzd+3-g4D1A@mail.gmail.com>
Dear Anish,
On Thu, 5 Dec 2019 at 00:55, anish singh <anish198519851985@gmail.com> wrote:
>
> On Wed, Dec 4, 2019 at 1:49 AM Pintu Agarwal <pintu.ping@gmail.com> wrote:
> >
> > On Wed, 4 Dec 2019 at 00:28, anish singh <anish198519851985@gmail.com> wrote:
> > >
> > > On Tue, Dec 3, 2019 at 6:12 AM Pintu Agarwal <pintu.ping@gmail.com> wrote:
> > > >
> > > > Hi All,
> > > >
> > > > I have one general query.
> > > >
> > > > If an interrupt handler is NOT getting called (for one device) after
> > > > the system resume (from snapshot image), then what could be the issue?
> > >
> > > Most likely during resume the interrupt was not enabled. So check
> > > irq status registers to see in the working and non working case.
> > >
> > Oh sorry, I forgot to mention one thing.
> > After resume, I can see that the interrupts are visible under /proc/interrupts.
> > # cat /proc/interrupts
> > CPU0 CPU1
> > [...]
> > 416: 1 0 IPU (null)
> > 417: 0 0 IPU (null)
> > 418: 0 0 IPU imx_drm ===> HDMI
> > 419: 2242 2 IPU imx_drm ===> LCD
> > [...]
> >
> > The interrupts are coming only for LCD display and thus its irq
> > handler is getting called.
> > But the interrupts are not coming for HDMI case, thus HDMI gives
> > "vblank timeout issue".
Just wanted to update you that I have resolved the "vblank timeout
issue" for HDMI (by restoring clock data during resume path).
Now the ipu-v3 interrupts are coming even for HDMI crtc.
But HDMI display is still not working. May be this is another issue.
Anyways, thank you so much for your support :)
Regards,
Pintu
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prev parent reply other threads:[~2019-12-30 13:51 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-12-03 14:10 interrupt handler not getting called after resume Pintu Agarwal
2019-12-03 18:58 ` anish singh
2019-12-04 9:49 ` Pintu Agarwal
2019-12-04 19:25 ` anish singh
2019-12-30 13:50 ` Pintu Agarwal [this message]
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