From: Grygorii Strashko <grygorii.strashko-l0cyMroinI0@public.gmane.org> To: "Jon Hunter" <jonathanh-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>, "Thomas Gleixner" <tglx-hfZtesqFncYOwBW4kG4KsQ@public.gmane.org>, "Jason Cooper" <jason-NLaQJdtUoK4Be96aLqz0jA@public.gmane.org>, "Marc Zyngier" <marc.zyngier-5wv7dgnIgG8@public.gmane.org>, "Benoît Cousson" <bcousson-rdvid1DuHRBWk0Htik3J/w@public.gmane.org>, "Tony Lindgren" <tony-4v6yS6AI5VpBDgjK7y7TUQ@public.gmane.org>, "Rob Herring" <robh+dt-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>, "Pawel Moll" <pawel.moll-5wv7dgnIgG8@public.gmane.org>, "Mark Rutland" <mark.rutland-5wv7dgnIgG8@public.gmane.org>, "Ian Campbell" <ijc+devicetree-KcIKpvwj1kUDXYZnReoRVg@public.gmane.org>, "Kumar Gala" <galak-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org>, "Stephen Warren" <swarren-3lzwWm7+Weoh9ZMKESR00Q@public.gmane.org>, "Thierry Reding" <thierry.reding-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> Cc: Kevin Hilman <khilman-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>, Geert Uytterhoeven <geert-Td1EMuHUCqxL1ZNQvxDV9g@public.gmane.org>, Lars-Peter Clausen <lars-Qo5EllUWu/uELgA04lAiVw@public.gmane.org>, Linus Walleij <linus.walleij-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>, linux-tegra-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-omap-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org Subject: Re: [PATCH 08/15] genirq: Add runtime power management support for IRQ chips Date: Fri, 18 Mar 2016 19:52:10 +0200 [thread overview] Message-ID: <56EC404A.9060001@ti.com> (raw) In-Reply-To: <56EC1719.5020408-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org> On 03/18/2016 04:56 PM, Jon Hunter wrote: > > On 18/03/16 14:40, Jon Hunter wrote: >> On 18/03/16 14:23, Grygorii Strashko wrote: >>> On 03/18/2016 02:27 PM, Jon Hunter wrote: >>>> >>>> On 18/03/16 11:11, Grygorii Strashko wrote: > > [snip] > >>> oh :( That will require updating of all drivers (and if it will be taken into account that >>> wakeup can be configured from sysfs + devm_ - it will be painful). >> >> Will it? I know that there are a few gpio chips that have some hacked >> ways to get around the PM issue, but I wonder how many drivers this >> really impacts. What sysfs entries are you referring too? echo enabled > /sys/devices/platform/44000000.ocp/48020000.serial/tty/ttyS2/power/wakeup > > Thinking about this some more, yes I guess it would impact all drivers > that use a gpio but don't use it for a wake-up. I could see that could > be a few drivers indeed. yep. I've just tested it - gpio was requested through sysfs and configured as IRQ - do suspend the same is if GPIO is requested as IRQ only and not configured as wakeup source [ 319.669760] PM: late suspend of devices complete after 0.213 msecs [ 319.671195] irq 191 has no wakeup set and has not been freed! [ 319.673453] PM: noirq suspend of devices complete after 2.258 msecs this is very minimal configuration - the regular one is at ~30-50 devices most of them will use IRQ and only ~10% are used as wakeup sources. > >>>> but it would avoid every irqchip having to >>>> handle this themselves and having a custom handler. >>> >>> irqchip like TI OMAP GPIO will need custom handling any way even if it's not expected >>> to be Powered off during Suspend or deep CPUIdle states, simply because its state >>> in suspend is unknown - PM state managed automatically (and depends on many factors) >>> and wakeup can be handled by special HW in case if GPIO bank was really switched off. >>> >>>>> I propose do not touch common/generic suspend code now. Any common code can be always >>>>> refactored later once there will be real drivers updated to use irqchip RPM >>>>> and which will support Suspend. >>>> >>>> If this is strongly opposed, I would concede to making this a pr_debug() >>>> as I think it could be useful. >>> >>> Probably yes, because most of the drivers now and IRQ PM core are not ready >>> for this approach. >> >> May be this calls for a new flag to not WARN if non-wakeup IRQs are not >> freed when entering suspend. > > Flag or pr_debug()? > Honestly, I don't know how to proceed - minimum is pr_debug. My personal opinion is still the same - don't touch suspend core code now, within this series. -- regards, -grygorii
WARNING: multiple messages have this Message-ID (diff)
From: Grygorii Strashko <grygorii.strashko@ti.com> To: "Jon Hunter" <jonathanh@nvidia.com>, "Thomas Gleixner" <tglx@linutronix.de>, "Jason Cooper" <jason@lakedaemon.net>, "Marc Zyngier" <marc.zyngier@arm.com>, "Benoît Cousson" <bcousson@baylibre.com>, "Tony Lindgren" <tony@atomide.com>, "Rob Herring" <robh+dt@kernel.org>, "Pawel Moll" <pawel.moll@arm.com>, "Mark Rutland" <mark.rutland@arm.com>, "Ian Campbell" <ijc+devicetree@hellion.org.uk>, "Kumar Gala" <galak@codeaurora.org>, "Stephen Warren" <swarren@wwwdotorg.org>, "Thierry Reding" <thierry.reding@gmail.com> Cc: Kevin Hilman <khilman@kernel.org>, Geert Uytterhoeven <geert@linux-m68k.org>, Lars-Peter Clausen <lars@metafoo.de>, Linus Walleij <linus.walleij@linaro.org>, <linux-tegra@vger.kernel.org>, <linux-omap@vger.kernel.org>, <devicetree@vger.kernel.org>, <linux-kernel@vger.kernel.org> Subject: Re: [PATCH 08/15] genirq: Add runtime power management support for IRQ chips Date: Fri, 18 Mar 2016 19:52:10 +0200 [thread overview] Message-ID: <56EC404A.9060001@ti.com> (raw) In-Reply-To: <56EC1719.5020408@nvidia.com> On 03/18/2016 04:56 PM, Jon Hunter wrote: > > On 18/03/16 14:40, Jon Hunter wrote: >> On 18/03/16 14:23, Grygorii Strashko wrote: >>> On 03/18/2016 02:27 PM, Jon Hunter wrote: >>>> >>>> On 18/03/16 11:11, Grygorii Strashko wrote: > > [snip] > >>> oh :( That will require updating of all drivers (and if it will be taken into account that >>> wakeup can be configured from sysfs + devm_ - it will be painful). >> >> Will it? I know that there are a few gpio chips that have some hacked >> ways to get around the PM issue, but I wonder how many drivers this >> really impacts. What sysfs entries are you referring too? echo enabled > /sys/devices/platform/44000000.ocp/48020000.serial/tty/ttyS2/power/wakeup > > Thinking about this some more, yes I guess it would impact all drivers > that use a gpio but don't use it for a wake-up. I could see that could > be a few drivers indeed. yep. I've just tested it - gpio was requested through sysfs and configured as IRQ - do suspend the same is if GPIO is requested as IRQ only and not configured as wakeup source [ 319.669760] PM: late suspend of devices complete after 0.213 msecs [ 319.671195] irq 191 has no wakeup set and has not been freed! [ 319.673453] PM: noirq suspend of devices complete after 2.258 msecs this is very minimal configuration - the regular one is at ~30-50 devices most of them will use IRQ and only ~10% are used as wakeup sources. > >>>> but it would avoid every irqchip having to >>>> handle this themselves and having a custom handler. >>> >>> irqchip like TI OMAP GPIO will need custom handling any way even if it's not expected >>> to be Powered off during Suspend or deep CPUIdle states, simply because its state >>> in suspend is unknown - PM state managed automatically (and depends on many factors) >>> and wakeup can be handled by special HW in case if GPIO bank was really switched off. >>> >>>>> I propose do not touch common/generic suspend code now. Any common code can be always >>>>> refactored later once there will be real drivers updated to use irqchip RPM >>>>> and which will support Suspend. >>>> >>>> If this is strongly opposed, I would concede to making this a pr_debug() >>>> as I think it could be useful. >>> >>> Probably yes, because most of the drivers now and IRQ PM core are not ready >>> for this approach. >> >> May be this calls for a new flag to not WARN if non-wakeup IRQs are not >> freed when entering suspend. > > Flag or pr_debug()? > Honestly, I don't know how to proceed - minimum is pr_debug. My personal opinion is still the same - don't touch suspend core code now, within this series. -- regards, -grygorii
next prev parent reply other threads:[~2016-03-18 17:52 UTC|newest] Thread overview: 125+ messages / expand[flat|nested] mbox.gz Atom feed top 2016-03-17 14:19 [PATCH 00/15] Add support for Tegra210 AGIC Jon Hunter 2016-03-17 14:19 ` [PATCH 01/15] ARM: tegra: Correct interrupt type for ARM TWD Jon Hunter [not found] ` <1458224359-32665-2-git-send-email-jonathanh-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org> 2016-04-01 23:25 ` Kevin Hilman 2016-04-01 23:25 ` Kevin Hilman 2016-04-05 14:04 ` Thierry Reding 2016-04-05 14:04 ` Thierry Reding 2016-03-17 14:19 ` [PATCH 02/15] ARM: OMAP: " Jon Hunter [not found] ` <1458224359-32665-3-git-send-email-jonathanh-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org> 2016-03-18 15:41 ` Grygorii Strashko 2016-03-18 15:41 ` Grygorii Strashko [not found] ` <56EC2191.2060800-l0cyMroinI0@public.gmane.org> 2016-03-29 14:02 ` Jon Hunter 2016-03-29 14:02 ` Jon Hunter [not found] ` <56FA8AEA.3000208-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org> 2016-03-30 21:23 ` Tony Lindgren 2016-03-30 21:23 ` Tony Lindgren [not found] ` <1458224359-32665-1-git-send-email-jonathanh-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org> 2016-03-17 14:19 ` [PATCH 03/15] irqchip/gic: Don't unnecessarily write the IRQ configuration Jon Hunter 2016-03-17 14:19 ` Jon Hunter [not found] ` <1458224359-32665-4-git-send-email-jonathanh-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org> 2016-04-09 10:50 ` Marc Zyngier 2016-04-09 10:50 ` Marc Zyngier 2016-03-17 14:19 ` [PATCH 04/15] irqchip/gic: WARN if setting the interrupt type fails Jon Hunter 2016-03-17 14:19 ` Jon Hunter [not found] ` <1458224359-32665-5-git-send-email-jonathanh-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org> 2016-03-17 14:51 ` Thomas Gleixner 2016-03-17 14:51 ` Thomas Gleixner 2016-03-17 15:04 ` Jon Hunter 2016-03-17 15:18 ` Jason Cooper [not found] ` <20160317151800.GH1184-fahSIxCzskDQ+YiMSub0/l6hYfS7NtTn@public.gmane.org> 2016-03-17 16:20 ` Jon Hunter 2016-03-17 16:20 ` Jon Hunter 2016-03-18 9:20 ` Geert Uytterhoeven [not found] ` <CAMuHMdU8PDUVZ8=S04fkahez1dh7JHjpj2-3w+Vfz05X=ZFMUQ-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org> 2016-03-18 9:54 ` Jon Hunter 2016-03-18 9:54 ` Jon Hunter [not found] ` <56EBD061.6030502-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org> 2016-03-18 10:22 ` Geert Uytterhoeven 2016-03-18 10:22 ` Geert Uytterhoeven [not found] ` <56EAC761.1040801-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org> 2016-04-09 10:58 ` Marc Zyngier 2016-04-09 10:58 ` Marc Zyngier 2016-04-11 15:31 ` Jon Hunter [not found] ` <570BC34A.5030806-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org> 2016-04-11 15:39 ` Marc Zyngier 2016-04-11 15:39 ` Marc Zyngier [not found] ` <570BC528.9050601-5wv7dgnIgG8@public.gmane.org> 2016-04-12 8:50 ` Jon Hunter 2016-04-12 8:50 ` Jon Hunter 2016-04-12 10:14 ` Marc Zyngier 2016-03-17 14:19 ` [PATCH 07/15] irqdomain: Don't set type when mapping an IRQ Jon Hunter 2016-03-17 14:19 ` Jon Hunter [not found] ` <1458224359-32665-8-git-send-email-jonathanh-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org> 2016-03-17 14:55 ` Thomas Gleixner 2016-03-17 14:55 ` Thomas Gleixner 2016-03-17 15:06 ` Jon Hunter 2016-03-17 18:19 ` Jon Hunter 2016-03-17 18:19 ` Jon Hunter 2016-03-17 14:19 ` [PATCH 08/15] genirq: Add runtime power management support for IRQ chips Jon Hunter 2016-03-17 14:19 ` Jon Hunter [not found] ` <1458224359-32665-9-git-send-email-jonathanh-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org> 2016-03-17 15:02 ` Marc Zyngier 2016-03-17 15:02 ` Marc Zyngier 2016-03-17 15:13 ` Jon Hunter 2016-03-17 15:13 ` Jon Hunter 2016-03-17 15:28 ` Marc Zyngier [not found] ` <56EACD21.20309-5wv7dgnIgG8@public.gmane.org> 2016-03-22 11:46 ` Linus Walleij 2016-03-22 11:46 ` Linus Walleij 2016-03-18 11:11 ` Grygorii Strashko 2016-03-18 11:11 ` Grygorii Strashko [not found] ` <56EBE244.6070400-l0cyMroinI0@public.gmane.org> 2016-03-18 12:27 ` Jon Hunter 2016-03-18 12:27 ` Jon Hunter 2016-03-18 14:23 ` Grygorii Strashko 2016-03-18 14:23 ` Grygorii Strashko [not found] ` <56EC0F7D.8050106-l0cyMroinI0@public.gmane.org> 2016-03-18 14:40 ` Jon Hunter 2016-03-18 14:40 ` Jon Hunter [not found] ` <56EC1362.2000005-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org> 2016-03-18 14:56 ` Jon Hunter 2016-03-18 14:56 ` Jon Hunter [not found] ` <56EC1719.5020408-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org> 2016-03-18 17:52 ` Grygorii Strashko [this message] 2016-03-18 17:52 ` Grygorii Strashko 2016-03-21 10:09 ` Jon Hunter 2016-03-21 10:09 ` Jon Hunter 2016-03-17 15:02 ` Thomas Gleixner 2016-03-17 15:46 ` Jon Hunter 2016-03-17 15:46 ` Jon Hunter 2016-03-17 14:19 ` [PATCH 05/15] irqchip: Mask the non-type/sense bits when translating an IRQ Jon Hunter [not found] ` <1458224359-32665-6-git-send-email-jonathanh-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org> 2016-04-09 11:03 ` Marc Zyngier 2016-04-09 11:03 ` Marc Zyngier [not found] ` <20160409120333.3982c53b-5wv7dgnIgG8@public.gmane.org> 2016-04-19 14:14 ` Jon Hunter 2016-04-19 14:14 ` Jon Hunter [not found] ` <57163D2F.5020005-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org> 2016-04-19 14:23 ` Marc Zyngier 2016-04-19 14:23 ` Marc Zyngier 2016-03-17 14:19 ` [PATCH 06/15] irqdomain: Ensure type settings match for an existing mapping Jon Hunter [not found] ` <1458224359-32665-7-git-send-email-jonathanh-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org> 2016-03-17 18:18 ` Jon Hunter 2016-03-17 18:18 ` Jon Hunter 2016-03-18 10:03 ` Grygorii Strashko 2016-03-18 10:03 ` Grygorii Strashko [not found] ` <56EBD272.1040404-l0cyMroinI0@public.gmane.org> 2016-03-18 10:33 ` Jon Hunter 2016-03-18 10:33 ` Jon Hunter 2016-03-17 14:19 ` [PATCH 09/15] irqchip/gic: Don't initialise chip if mapping IO space fails Jon Hunter [not found] ` <1458224359-32665-10-git-send-email-jonathanh-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org> 2016-04-09 11:09 ` Marc Zyngier 2016-04-09 11:09 ` Marc Zyngier 2016-03-17 14:19 ` [PATCH 10/15] irqchip/gic: Remove static irq_chip definition for eoimode1 Jon Hunter [not found] ` <1458224359-32665-11-git-send-email-jonathanh-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org> 2016-03-22 11:49 ` Linus Walleij 2016-03-22 11:49 ` Linus Walleij 2016-04-09 11:38 ` Marc Zyngier 2016-03-17 14:19 ` [PATCH 11/15] irqchip/gic: Return an error if GIC initialisation fails Jon Hunter [not found] ` <1458224359-32665-12-git-send-email-jonathanh-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org> 2016-04-09 11:43 ` Marc Zyngier 2016-04-09 11:43 ` Marc Zyngier 2016-03-17 14:19 ` [PATCH 12/15] irqchip/gic: Pass GIC pointer to save/restore functions Jon Hunter 2016-04-09 11:52 ` Marc Zyngier 2016-03-17 14:19 ` [PATCH 13/15] irqchip/gic: Prepare for adding platform driver Jon Hunter [not found] ` <1458224359-32665-14-git-send-email-jonathanh-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org> 2016-03-29 13:04 ` Geert Uytterhoeven 2016-03-29 13:04 ` Geert Uytterhoeven [not found] ` <CAMuHMdVwZgsPNdkWooLHg5H9_Mmv_mKa=zh9T4K-mfjPUEk4CQ-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org> 2016-03-29 13:59 ` Jon Hunter 2016-03-29 13:59 ` Jon Hunter 2016-03-17 14:19 ` [PATCH 14/15] dt-bindings: arm-gic: Drop 'clock-names' from binding document Jon Hunter [not found] ` <1458224359-32665-15-git-send-email-jonathanh-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org> 2016-03-17 20:14 ` Rob Herring 2016-03-17 20:14 ` Rob Herring 2016-03-18 8:37 ` Jon Hunter [not found] ` <56EBBE38.6070303-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org> 2016-04-12 8:54 ` Jon Hunter 2016-04-12 8:54 ` Jon Hunter 2016-03-18 9:13 ` Geert Uytterhoeven 2016-03-18 9:13 ` Geert Uytterhoeven [not found] ` <CAMuHMdV0QiWR0bML44zhAx+MStmQhQWKd=b_TMKnEdu_hw_ReA-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org> 2016-03-18 10:13 ` Jon Hunter 2016-03-18 10:13 ` Jon Hunter [not found] ` <56EBD4E5.1060002-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org> 2016-03-18 10:52 ` Geert Uytterhoeven 2016-03-18 10:52 ` Geert Uytterhoeven [not found] ` <CAMuHMdWXqS9cru74Ckr47gFVTf2MkmjZUtMt4MeXW_1V7x+KHw-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org> 2016-03-18 10:56 ` Jon Hunter 2016-03-18 10:56 ` Jon Hunter [not found] ` <56EBDEFA.30102-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org> 2016-03-18 12:05 ` Geert Uytterhoeven 2016-03-18 12:05 ` Geert Uytterhoeven [not found] ` <CAMuHMdUkGiX6YWzbRVJaJ4BNskE8PUXq-7Zob40f=CEZyjtJiA-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org> 2016-03-18 12:42 ` Jon Hunter 2016-03-18 12:42 ` Jon Hunter 2016-03-18 12:47 ` Grygorii Strashko [not found] ` <56EBF8E0.8020700-l0cyMroinI0@public.gmane.org> 2016-03-18 13:02 ` Geert Uytterhoeven 2016-03-18 13:02 ` Geert Uytterhoeven 2016-03-18 18:36 ` Grygorii Strashko 2016-03-17 14:19 ` [PATCH 15/15] irqchip/gic: Add support for tegra AGIC interrupt controller Jon Hunter
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