Nokia N900 retention mode in v4.6, camera buttons fun

From	Pavel Machek <pavel@ucw.cz>
Newsgroups	linux.kernel
Subject	Nokia N900 retention mode in v4.6, camera buttons fun
Date	2016-04-12 14:20 +0200
Message-ID	<rn5st-7hl-9@gated-at.bofh.it> (permalink)
References	(5 earlier) <rlrdM-2RM-3@gated-at.bofh.it> <rlrQt-38d-3@gated-at.bofh.it> <rmGu7-3xh-31@gated-at.bofh.it> <rmGDM-3Br-11@gated-at.bofh.it> <rmRpv-3Vw-7@gated-at.bofh.it>
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Hi!

> > > Do you think you could try with my config?
> 
> Yeah disabling lockdep by removing PROVE_LOCKING from omap2plus_defconfig
> makes n900 LCD work for me again. Not getting any lockdep warnings
> during boot with lockdep enabled though. So basically the following
> patch makes LCD work on n900 with omap2plus_defconfig.

Good, at least it is consistent.

> > Ok, it works now. I was doing tests in daylight so it was poorly
> > visible. The right part of keyboard stays lit (but that's expected
> > AFAICT), but the left part blinks.
> 
> During idle, both should go off and are doing so for me. Both LEDs off
> indicates off mode, left LED off is for retention mode. So you still
> have something blocking off mode, maybe check:
> 
> echo 1 > /sys/kernel/debug/pm_debug/enable_off_mode

What is the power difference between retention and off? I'm now down
to cca 25mA, which should be around 50 hours standby time. Not ideal,
but should be usable.

In the meantime, I found what is causing the rention mode to break for
me: CONFIG_HSI (aka wireless modem support). With HSI off, it seems to work.

I still get problems with the camera button, in config similar to
defconfig.  For some reason, I'm even getting (autorepeating) ^@ on
console. As long as I hold camera button down, I even get it into off
mode for brief period.

Best regards,
								Pavel
								
-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html

Thread

Re: N900 sleep mode (in 4.5-rc0, if that matters) Pavel Machek <pavel@ucw.cz> - 2016-04-04 23:40 +0200
  Re: N900 sleep mode (in 4.5-rc0, if that matters) Tony Lindgren <tony@atomide.com> - 2016-04-05 00:10 +0200
    Re: N900 sleep mode (in 4.5-rc0, if that matters) Pavel Machek <pavel@ucw.cz> - 2016-04-05 12:10 +0200
    Re: N900 sleep mode (in 4.5-rc0, if that matters) Pavel Machek <pavel@ucw.cz> - 2016-04-05 15:20 +0200
    4.4: camera and unlock buttons produce tons of interrupts (was Re:  N900 sleep mode) Pavel Machek <pavel@ucw.cz> - 2016-04-05 16:30 +0200
      Re: 4.4: camera and unlock buttons produce tons of interrupts (was  Re: N900 sleep mode) Tony Lindgren <tony@atomide.com> - 2016-04-05 17:30 +0200
        Re: 4.4: camera and unlock buttons produce tons of interrupts (was  Re: N900 sleep mode) Pavel Machek <pavel@ucw.cz> - 2016-04-05 23:00 +0200
          Re: 4.4: camera and unlock buttons produce tons of interrupts (was  Re: N900 sleep mode) Tony Lindgren <tony@atomide.com> - 2016-04-07 19:50 +0200
            Re: 4.4, 4.6: camera and unlock buttons produce tons of interrupts  (was Re: N900 sleep mode) Pavel Machek <pavel@ucw.cz> - 2016-04-07 21:50 +0200
              Re: 4.4, 4.6: camera and unlock buttons produce tons of interrupts  (was Re: N900 sleep mode) Tony Lindgren <tony@atomide.com> - 2016-04-07 23:40 +0200
                Re: 4.4, 4.6: camera and unlock buttons produce tons of interrupts  (was Re: N900 sleep mode) Pavel Machek <pavel@ucw.cz> - 2016-04-08 01:10 +0200
                Re: 4.4, 4.6: camera and unlock buttons produce tons of interrupts  (was Re: N900 sleep mode) Tony Lindgren <tony@atomide.com> - 2016-04-08 01:50 +0200
                Re: 4.4, 4.6: camera and unlock buttons produce tons of interrupts  (was Re: N900 sleep mode) Pavel Machek <pavel@ucw.cz> - 2016-04-08 11:30 +0200
                4.6-rc2: regression with omap video and lockdep (was Re: 4.4, 4.6:  camera and unlock buttons produce tons of interrupts (was Re: N900 sleep  mode)) Pavel Machek <pavel@ucw.cz> - 2016-04-11 10:30 +0200
                Re: 4.4, 4.6: camera and unlock buttons produce tons of interrupts  (was Re: N900 sleep mode) Pavel Machek <pavel@ucw.cz> - 2016-04-11 11:40 +0200
                Re: 4.4, 4.6: camera and unlock buttons produce tons of interrupts  (was Re: N900 sleep mode) Pavel Machek <pavel@ucw.cz> - 2016-04-11 11:50 +0200
                Re: 4.4, 4.6: camera and unlock buttons produce tons of interrupts  (was Re: N900 sleep mode) Tony Lindgren <tony@atomide.com> - 2016-04-11 23:20 +0200
                Nokia N900 retention mode in v4.6, camera buttons fun Pavel Machek <pavel@ucw.cz> - 2016-04-12 14:20 +0200
                Re: Nokia N900 retention mode in v4.6, camera buttons fun Pavel Machek <pavel@ucw.cz> - 2016-04-12 14:40 +0200
                Re: Nokia N900 retention mode in v4.6, camera buttons fun Tony Lindgren <tony@atomide.com> - 2016-04-12 18:40 +0200
                Re: Nokia N900 retention mode in v4.6, camera buttons fun Tomi Valkeinen <tomi.valkeinen@ti.com> - 2016-04-13 08:00 +0200
                Re: Nokia N900 retention mode in v4.6, camera buttons fun Tony Lindgren <tony@atomide.com> - 2016-04-13 17:20 +0200

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