[PATCH v2 3/3] drm/gma500: Fix (vblank) IRQs not working after suspend/resume

[Patrik Jakobsson]

On Sat, Sep 10, 2022 at 9:50 PM Hans de Goede <hdegoede at redhat.com> wrote:
>
> Hi Patrik,
>
> On 9/9/22 10:45, Hans de Goede wrote:
> > Hi,
> >
> > On 9/9/22 09:34, Patrik Jakobsson wrote:
> >> On Thu, Sep 8, 2022 at 3:39 PM Hans de Goede
> >> <hdegoede at redhat.com> wrote:
> >>>
> >>> Hi,
> >>>
> >>> On 9/8/22 15:26, Patrik Jakobsson wrote:
>
> <snip>
>
> >>>> On Poulsbo I can see
> >>>> interrupts not getting handled during suspend/resume even with this
> >>>> patch applied.
> >>>
> >>> "during" ?  I guess you mean _after_ a suspend/resume ?
> >>
> >> Yes. I get: irq 16: nobody cared (try booting with the "irqpoll" option).
> >> But perhaps the system is just too slow to respond.
>
> So I've just tested on a Sony Vaio VPCX11S1E (Atom Z540 with PSB graphics)
> and with my entire patch-set (did not test without) suspend/resume works
> fine there without any "irq xx: nobody cared" messages.

Your patch fixes the problem on my FitPC (Atom Z530) as well. Great!

I have the Acer AOD270 so I can look further into the MSI problem. But
as you say, the current solution might be what we want.

-Patrik

>
> Note that on the Vaio VPCX11S1E the gma500 is using irq 18 rather then
> 16 and that irq is not shared with anything. So I wonder if this is
> related to the irq being shared?
>
> Regards,
>
> Hans
>