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))

From	Pavel Machek <pavel@ucw.cz>
Newsgroups	linux.kernel
Subject	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))
Date	2016-04-11 10:30 +0200
Message-ID	<rmFon-2Ng-29@gated-at.bofh.it> (permalink)
References	(5 earlier) <rlme6-7wf-3@gated-at.bofh.it> <rlo6e-o4-7@gated-at.bofh.it> <rlpOG-1Do-7@gated-at.bofh.it> <rlrdM-2RM-3@gated-at.bofh.it> <rlrQt-38d-3@gated-at.bofh.it>
Organization	linux.* mail to news gateway

Show all headers | View raw

Hi!

> > > Nothing idling for me with your .config.. And it seems slower to boot
> > > compared to omap2plus_defconfig? Maybe because of the extra GPIO
> > > interrupts?
> > 
> > Extra interrupts only happen when enable_off_mode is 1, so that should
> > not be an issue during boot.
> 
> OK maybe it's just the extra driver probe time then.

Heh. I had earlyprintk enabled. That should explain it.

> Well I've been just using omap2plus_defconfig with:
> 
> # modprobe tsc2005
> # modprobe gpio_backlight
> # modprobe panel_sony_acx565akm
> # modprobe omapfb
> 
> # echo 255 > /sys/class/backlight/acx565akm/brightness
> 
> And then the following to blank for idle:
> 
> # echo 1 > /sys/devices/platform/omapfb/graphics/fb0/blank
> 
> But in the world of eternal regressions, I'm not seeing anything
> on the framebuffer with v4.6-rc2 :( No idea what broke it or when
> as my n900 is in the rack.

Can you try this patch to your config -- disabling lockdep? It should
fix the video for you. (And if you have the serial console... do you
see any warnings from lockdep?)

Thanks,
								Pavel
								
--- config.def	2016-04-08 21:50:04.519622137 +0200
+++ .config	2016-04-11 10:22:52.988193318 +0200
@@ -4183,15 +4183,12 @@
 CONFIG_DEBUG_SPINLOCK=y
 CONFIG_DEBUG_MUTEXES=y
 # CONFIG_DEBUG_WW_MUTEX_SLOWPATH is not set
-CONFIG_DEBUG_LOCK_ALLOC=y
-CONFIG_PROVE_LOCKING=y
-CONFIG_LOCKDEP=y
+# CONFIG_DEBUG_LOCK_ALLOC is not set
+# CONFIG_PROVE_LOCKING is not set
 # CONFIG_LOCK_STAT is not set
-# CONFIG_DEBUG_LOCKDEP is not set
 # CONFIG_DEBUG_ATOMIC_SLEEP is not set
 # CONFIG_DEBUG_LOCKING_API_SELFTESTS is not set
 # CONFIG_LOCK_TORTURE_TEST is not set
-CONFIG_TRACE_IRQFLAGS=y
 CONFIG_STACKTRACE=y
 # CONFIG_DEBUG_KOBJECT is not set
 # CONFIG_DEBUG_BUGVERBOSE is not set
@@ -4204,8 +4201,7 @@
 #
 # RCU Debugging
 #
-CONFIG_PROVE_RCU=y
-# CONFIG_PROVE_RCU_REPEATEDLY is not set
+# CONFIG_PROVE_RCU is not set
 # CONFIG_SPARSE_RCU_POINTER is not set
 # CONFIG_TORTURE_TEST is not set
 # CONFIG_RCU_TORTURE_TEST is not set




-- 
(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

csiph-web