On Tue, 07 Aug 2018 23:05:07 -0700 Stephen Boyd <swboyd@xxxxxxxxxxxx> wrote: > Quoting Lina Iyer (2018-08-02 05:58:27) > > On Thu, Aug 02 2018 at 01:27 -0600, Marc Zyngier wrote: > > > > > >Sure. But once woken up (GIC *and* TLMM), the gpio line (which I > > >assume is level) is still high at the TLMM input. So why isn't it > > >registering that state once it has been woken up? > > > > > >I can understand that it would be missing an edge. But that doesn't > > >hold for level signalling. > > > > > Sure, yes. Sorry for not registering your point in my response. > > Once woken up we should see the level interrupt in TLMM. > > And the level type gpio interrupt will trigger the TLMM summary > interrupt line after the wakeup? So then the only thing that needs to be > replayed is edge interrupts? How are edge interrupts going to be > replayed? Level interrupts should be taken care of without doing anything, by the very nature of being a level signal. Edge interrupts should be replayed using check_irq_resend() after taking the right locks and making the interrupt pending. Or, if there is a way for SW to make the interrupt pending at the TLMM level, to use that as a way to reinject the interrupt (which would be the preferred way, as it avoids all kind of ugly locking considerations). Thanks, M. -- Without deviation from the norm, progress is not possible. -- To unsubscribe from this list: send the line "unsubscribe linux-arm-msm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
