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Groups > linux.kernel > #1518740
| From | Hans de Goede <hdegoede@redhat.com> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | Re: PM regression with LED changes in next-20161109 |
| Date | 2016-11-10 09:40 +0100 |
| Message-ID | <sBT3Q-3a8-19@gated-at.bofh.it> (permalink) |
| References | <sBGJj-34V-11@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
Hi,
On 09-11-16 20:23, Tony Lindgren wrote:
> Hi,
>
> Looks like commit 883d32ce3385 ("leds: core: Add support for poll()ing
> the sysfs brightness attr for changes.") breaks runtime PM for me.
>
> On my omap dm3730 based test system, idle power consumption is over 70
> times higher now with this patch! It goes from about 6mW for the core
> system to over 440mW during idle meaning there's some busy timer now
> active.
Do you have any blinking LEDs or LED triggers defined on the system ?
> Reverting this patch fixes the issue. Any ideas?
All I can think of is something calling led_set_brightness quite often,
the patch in question makes led_set_brightness somewhat more expensive,
but it should not cause such a big difference unless something is
really calling led_set_brightness quite often maybe something is calling
it with the same value all the time ?
Regards,
Hans
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PM regression with LED changes in next-20161109 Tony Lindgren <tony@atomide.com> - 2016-11-09 20:30 +0100
Re: PM regression with LED changes in next-20161109 Jacek Anaszewski <jacek.anaszewski@gmail.com> - 2016-11-09 21:50 +0100
Re: PM regression with LED changes in next-20161109 Hans de Goede <hdegoede@redhat.com> - 2016-11-10 09:50 +0100
Re: PM regression with LED changes in next-20161109 Jacek Anaszewski <j.anaszewski@samsung.com> - 2016-11-10 14:00 +0100
Re: PM regression with LED changes in next-20161109 Hans de Goede <hdegoede@redhat.com> - 2016-11-10 14:10 +0100
Re: PM regression with LED changes in next-20161109 Jacek Anaszewski <j.anaszewski@samsung.com> - 2016-11-10 15:00 +0100
Re: PM regression with LED changes in next-20161109 Pavel Machek <pavel@ucw.cz> - 2016-11-10 17:40 +0100
Re: PM regression with LED changes in next-20161109 Pavel Machek <pavel@ucw.cz> - 2016-11-10 17:30 +0100
Re: PM regression with LED changes in next-20161109 Hans de Goede <hdegoede@redhat.com> - 2016-11-10 17:50 +0100
Re: PM regression with LED changes in next-20161109 Pavel Machek <pavel@ucw.cz> - 2016-11-10 21:50 +0100
Re: PM regression with LED changes in next-20161109 Hans de Goede <hdegoede@redhat.com> - 2016-11-11 09:30 +0100
Re: PM regression with LED changes in next-20161109 Tony Lindgren <tony@atomide.com> - 2016-11-10 19:10 +0100
Re: PM regression with LED changes in next-20161109 Pavel Machek <pavel@ucw.cz> - 2016-11-10 21:30 +0100
Re: PM regression with LED changes in next-20161109 Jacek Anaszewski <jacek.anaszewski@gmail.com> - 2016-11-10 22:40 +0100
Re: PM regression with LED changes in next-20161109 Pavel Machek <pavel@ucw.cz> - 2016-11-11 13:10 +0100
Re: PM regression with LED changes in next-20161109 Jacek Anaszewski <jacek.anaszewski@gmail.com> - 2016-11-11 18:10 +0100
Re: PM regression with LED changes in next-20161109 Hans de Goede <hdegoede@redhat.com> - 2016-11-11 20:30 +0100
Re: PM regression with LED changes in next-20161109 Hans de Goede <hdegoede@redhat.com> - 2016-11-10 09:40 +0100
Re: PM regression with LED changes in next-20161109 Tony Lindgren <tony@atomide.com> - 2016-11-10 16:20 +0100
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