linux-kernel - Re: [PATCH 29/35] arm: omap: intc: switch over to linear irq domain

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Message-ID: <20140730162038.GH7272@saruman.home>
Date:	Wed, 30 Jul 2014 11:20:38 -0500
From:	Felipe Balbi <balbi@...com>
To:	Nishanth Menon <nm@...com>
CC:	"Balbi, Felipe" <balbi@...com>, Tony Lindgren <tony@...mide.com>,
	dt list <devicetree@...r.kernel.org>,
	Russell King - ARM Linux <linux@....linux.org.uk>,
	<jason@...edaemon.net>, Kevin Hilman <khilman@...prootsystems.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Tero Kristo <t-kristo@...com>,
	Benoit Cousson <bcousson@...libre.com>, <tglx@...utronix.de>,
	Linux OMAP Mailing List <linux-omap@...r.kernel.org>,
	Linux ARM Kernel Mailing List 
	<linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH 29/35] arm: omap: intc: switch over to linear irq domain

Hi,

On Wed, Jul 30, 2014 at 10:45:41AM -0500, Nishanth Menon wrote:
> On Wed, Jul 30, 2014 at 9:40 AM, Felipe Balbi <balbi@...com> wrote:
> > HI,
> >
> > On Tue, Jul 29, 2014 at 11:04:21PM -0700, Tony Lindgren wrote:
> >> * Felipe Balbi <balbi@...com> [140729 09:36]:
> >> > Hi,
> >> >
> >> > On Tue, Jul 29, 2014 at 10:40:57AM -0500, Felipe Balbi wrote:
> >> > > On Tue, Jul 29, 2014 at 08:20:52AM -0700, Tony Lindgren wrote:
> >> > > > * Felipe Balbi <balbi@...com> [140729 07:18]:
> >> > > > > Hi,
> >> > > > >
> >> > > > > On Tue, Jul 29, 2014 at 05:14:25AM -0700, Tony Lindgren wrote:
> >> > > > > > * Felipe Balbi <balbi@...com> [140728 14:19]:
> >> > > > > > > now that we don't need to support legacy board-files,
> >> > > > > > > we can completely switch over to a linear irq domain
> >> > > > > > > and make use of irq_alloc_domain_generic_chips() to
> >> > > > > > > allocate all generic irq chips for us.
> >> > > > > >
> >> > > > > > This patch seems to somehow break off-idle for omap3
> >> > > > > > where it no longer wakes up.
> >> > > > >
> >> > > > > Sure your bisection is correct ? This patch just switches from legacy
> >> > > > > irq domain to linear irq domain.
> >> > > >
> >> > > > Yes, I tried it a few times. Just enabling
> >> > > > retention idle hangs too with this patch.
> >> > > >
> >> > > > Maybe it's omap3_prcm_irq_setup that relies on
> >> > > > 11 + OMAP_INTC_START? There may be other such issues
> >> > >
> >> > > lol.
> >> > >
> >> > > OMAP4 has the same nonsense.
> >> >
> >> > made me think why (if) OMAP4 works with that same setup. Does wake from
> >> > OFF work with OMAP4 ?
> >>
> >> Not without similar changes, omap4+ has the same issue.. There's a RFC
> >> series from Nishant to fix some of this, and Tero is moving the PRCM
> >> into a driver.
> >>
> >> > Anyway, here's a quick little hack to check if that's the reason for the
> >> > regression:
> >>
> >> OK yeah that's along the same lines with Nishant's RFC series in thread
> >> "[RFC PATCH 0/7] ARM: OMAP4+: PRM: minor cleanups and dt support of
> >> interrupts"
> >>
> >> FYI, it did not compile, needs to include linux/of_irq.h. But yes,
> >
> > I might have sent the wrong version as I had that same build error and
> > fixed it localy.
> >
> >> it fixes the regression for me, Also now the whole series works for
> >> me :)
> >
> > good to know.
> >
> > What do you want to do now ? Wait for PRCM to become a driver ? Wait for
> > Nishanth's series to get accepted ? I guess the same thing could be done
> > for OMAP3 and AM33, then we would have a chance of having working wake
> > from idle with the new irqchip.
> 
> I can repost the current series as it stands now once 17-rc1 comes out
> (without the build failure ofcourse).. if that helps to move it out of
> RFC status.

That'd be great. It would be ever greater if you could add support for
OMAP3 on that too.

cheers

-- 
balbi

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