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

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Message-ID: <20140730144059.GA7272@saruman.home>
Date:	Wed, 30 Jul 2014 09:40:59 -0500
From:	Felipe Balbi <balbi@...com>
To:	Tony Lindgren <tony@...mide.com>
CC:	Felipe Balbi <balbi@...com>,
	Linux OMAP Mailing List <linux-omap@...r.kernel.org>,
	Linux ARM Kernel Mailing List 
	<linux-arm-kernel@...ts.infradead.org>, <bcousson@...libre.com>,
	<linux@....linux.org.uk>, <khilman@...prootsystems.com>,
	<tglx@...utronix.de>, <jason@...edaemon.net>,
	<devicetree@...r.kernel.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Nishanth Menon <nm@...com>, Tero Kristo <t-kristo@...com>
Subject: Re: [PATCH 29/35] arm: omap: intc: switch over to linear irq domain

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.

cheers

-- 
balbi

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