N810 suspend

N810 suspend

[green]

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What are the chances of getting suspend (resume from) working on the N810?  Are 
there any patches or branches around that I can test (I'm slowly learning how 
to use git)?

I'm running Debian on an N810.  With the current state of power management in 
linux-omap, the N810 will only run (with LCD off) for about 12 hours on a 
charge.

Thanks.

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Re: N810 suspend

[Tony Lindgren]

* green <greenfreedom10@gmail.com> [081215 13:08]:
> What are the chances of getting suspend (resume from) working on the N810?  Are 
> there any patches or branches around that I can test (I'm slowly learning how 
> to use git)?
> 
> I'm running Debian on an N810.  With the current state of power management in 
> linux-omap, the N810 will only run (with LCD off) for about 12 hours on a 
> charge.

Well you need to make sure the serial clocks are not enabled. Kevin
has some patches for that in his pm branch. So you'll most likely want
to use his whole pm branch.

Also, you need to make sure you have sleep while idle enabled:

# echo 1 > /sys/power/sleep_while_idle

It used to work, but I have not tried for six months or so.

Regards,

Tony

Re: N810 suspend

[Kevin Hilman]

Tony Lindgren <tony@atomide.com> writes:

> * green <greenfreedom10@gmail.com> [081215 13:08]:
>> What are the chances of getting suspend (resume from) working on the N810?  Are 
>> there any patches or branches around that I can test (I'm slowly learning how 
>> to use git)?
>> 
>> I'm running Debian on an N810.  With the current state of power management in 
>> linux-omap, the N810 will only run (with LCD off) for about 12 hours on a 
>> charge.
>
> Well you need to make sure the serial clocks are not enabled. Kevin
> has some patches for that in his pm branch. So you'll most likely want
> to use his whole pm branch.
>
> Also, you need to make sure you have sleep while idle enabled:
>
> # echo 1 > /sys/power/sleep_while_idle
>
> It used to work, but I have not tried for six months or so.
>

Suspend/resume on n810 is currently broken in linux-omap.  I submitted
a patch a week or so ago to fix an assembly bug which was crashing the
suspend, but it is still not resuming.

Most likely a simple fix needed to init the proper wakeup sources, but
I haven't tested further.

Kevin

Re: N810 suspend

[green]

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On Mon, 2008.12.15, 350, Kevin Hilman wrote:
> Tony Lindgren <tony@atomide.com> writes:
> > * green <greenfreedom10@gmail.com> [081215 13:08]:
> >> What are the chances of getting suspend (resume from) working on the N810?  Are 
> >> there any patches or branches around that I can test (I'm slowly learning how 
> >> to use git)?
> >
> > Well you need to make sure the serial clocks are not enabled. Kevin
> > has some patches for that in his pm branch. So you'll most likely want
> > to use his whole pm branch.
> 
> Suspend/resume on n810 is currently broken in linux-omap.  I submitted
> a patch a week or so ago to fix an assembly bug which was crashing the
> suspend, but it is still not resuming.
> 
> Most likely a simple fix needed to init the proper wakeup sources, but
> I haven't tested further.

I'll be looking for any progress ;) and will test it when I can.

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Re: N810 suspend

[Jarkko Nikula]

On Mon, 15 Dec 2008 16:51:16 -0700
"ext green" <greenfreedom10@gmail.com> wrote:

> > Suspend/resume on n810 is currently broken in linux-omap.  I submitted
> > a patch a week or so ago to fix an assembly bug which was crashing the
> > suspend, but it is still not resuming.
> > 
> > Most likely a simple fix needed to init the proper wakeup sources, but
> > I haven't tested further.
> 
> I'll be looking for any progress ;) and will test it when I can.
> 
Hold your horses, suspend is not very useful on N8x0 due watchdog kick
after ~30 seconds or so :-)

Of course, generally suspend should work on OMAP & device drivers even
though if it's broken currently.

What you might be interested instead is to get sleep_while_idle
working. Then the system is running but should consume just few
milliamps.


Jarkko

Re: N810 suspend

[Jarkko Nikula]

On Mon, 15 Dec 2008 13:14:32 -0800
"ext Tony Lindgren" <tony@atomide.com> wrote:

> > I'm running Debian on an N810.  With the current state of power management in 
> > linux-omap, the N810 will only run (with LCD off) for about 12 hours on a 
> > charge.
> 
> Well you need to make sure the serial clocks are not enabled. Kevin
> has some patches for that in his pm branch. So you'll most likely want
> to use his whole pm branch.
> 
> Also, you need to make sure you have sleep while idle enabled:
> 
> # echo 1 > /sys/power/sleep_while_idle
> 
> It used to work, but I have not tried for six months or so.
> 
How did you disable the LCD and FB clocks? Does
xserver-xorg-video-fbdev from Debian (it works!) do necessary steps with
omap fb driver or is xomap required?


Jarkko

Re: N810 suspend

[Tony Lindgren]

* Jarkko Nikula <jarkko.nikula@nokia.com> [081215 23:26]:
> On Mon, 15 Dec 2008 13:14:32 -0800
> "ext Tony Lindgren" <tony@atomide.com> wrote:
> 
> > > I'm running Debian on an N810.  With the current state of power management in 
> > > linux-omap, the N810 will only run (with LCD off) for about 12 hours on a 
> > > charge.
> > 
> > Well you need to make sure the serial clocks are not enabled. Kevin
> > has some patches for that in his pm branch. So you'll most likely want
> > to use his whole pm branch.
> > 
> > Also, you need to make sure you have sleep while idle enabled:
> > 
> > # echo 1 > /sys/power/sleep_while_idle
> > 
> > It used to work, but I have not tried for six months or so.
> > 
> How did you disable the LCD and FB clocks? Does
> xserver-xorg-video-fbdev from Debian (it works!) do necessary steps with
> omap fb driver or is xomap required?

Oh, I just tested that sleep-while-idle worked when fb was blanked. I
had a script that forced the LCD off via /sys, sorry don't remember
the path now. Will be also heading to catch a plane in few hours, may
not be able to check it right now.

Regards,

Tony

Re: N810 suspend

[green]

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On Tue, 2008.12.16, 351, Tony Lindgren wrote:
> * Jarkko Nikula <jarkko.nikula@nokia.com> [081215 23:26]:
> > On Mon, 15 Dec 2008 13:14:32 -0800 "ext Tony Lindgren" <tony@atomide.com> wrote:
> > > Well you need to make sure the serial clocks are not enabled. Kevin
> > > has some patches for that in his pm branch. So you'll most likely want
> > > to use his whole pm branch.
> > > 
> > > Also, you need to make sure you have sleep while idle enabled:
> > > 
> > > # echo 1 > /sys/power/sleep_while_idle
> > > 
> > > It used to work, but I have not tried for six months or so.
> > > 
> > How did you disable the LCD and FB clocks? Does
> > xserver-xorg-video-fbdev from Debian (it works!) do necessary steps with
> > omap fb driver or is xomap required?
> 
> Oh, I just tested that sleep-while-idle worked when fb was blanked. I
> had a script that forced the LCD off via /sys, sorry don't remember
> the path now. Will be also heading to catch a plane in few hours, may
> not be able to check it right now.

'echo 3 > /sys/class/graphics/fb0/blank' turns off the LCD, if that is what you 
mean.

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Re: N810 suspend

[Tony Lindgren]

* green <greenfreedom10@gmail.com> [081216 08:57]:
> On Tue, 2008.12.16, 351, Tony Lindgren wrote:
> > * Jarkko Nikula <jarkko.nikula@nokia.com> [081215 23:26]:
> > > On Mon, 15 Dec 2008 13:14:32 -0800 "ext Tony Lindgren" <tony@atomide.com> wrote:
> > > > Well you need to make sure the serial clocks are not enabled. Kevin
> > > > has some patches for that in his pm branch. So you'll most likely want
> > > > to use his whole pm branch.
> > > > 
> > > > Also, you need to make sure you have sleep while idle enabled:
> > > > 
> > > > # echo 1 > /sys/power/sleep_while_idle
> > > > 
> > > > It used to work, but I have not tried for six months or so.
> > > > 
> > > How did you disable the LCD and FB clocks? Does
> > > xserver-xorg-video-fbdev from Debian (it works!) do necessary steps with
> > > omap fb driver or is xomap required?
> > 
> > Oh, I just tested that sleep-while-idle worked when fb was blanked. I
> > had a script that forced the LCD off via /sys, sorry don't remember
> > the path now. Will be also heading to catch a plane in few hours, may
> > not be able to check it right now.
> 
> 'echo 3 > /sys/class/graphics/fb0/blank' turns off the LCD, if that is what you 
> mean.

Thanks, that's what I did.

Tony

Re: N810 suspend

[Jarkko Nikula]

On Tue, 16 Dec 2008 09:22:38 -0800
"ext Tony Lindgren" <tony@atomide.com> wrote:

> > > Oh, I just tested that sleep-while-idle worked when fb was blanked. I
> > > had a script that forced the LCD off via /sys, sorry don't remember
> > > the path now. Will be also heading to catch a plane in few hours, may
> > > not be able to check it right now.
> > 
> > 'echo 3 > /sys/class/graphics/fb0/blank' turns off the LCD, if that is what you 
> > mean.
> 
> Thanks, that's what I did.
> 
And it worked with N800. Battery current dropped below 10 mA after
unplugging the USB cable so OMAP was going into retention.

'echo 1 >/sys/power/clocks_off_while_idle' seems to not have any effect?


Jarkko

Re: N810 suspend

[Jarkko Nikula]

On Wed, 17 Dec 2008 14:09:11 +0200
"ext Jarkko Nikula" <jarkko.nikula@nokia.com> wrote:

> On Tue, 16 Dec 2008 09:22:38 -0800
> "ext Tony Lindgren" <tony@atomide.com> wrote:
> 
> > > > Oh, I just tested that sleep-while-idle worked when fb was blanked. I
> > > > had a script that forced the LCD off via /sys, sorry don't remember
> > > > the path now. Will be also heading to catch a plane in few hours, may
> > > > not be able to check it right now.
> > > 
> > > 'echo 3 > /sys/class/graphics/fb0/blank' turns off the LCD, if that is what you 
> > > mean.
> > 
> > Thanks, that's what I did.
> > 
> And it worked with N800. Battery current dropped below 10 mA after
> unplugging the USB cable so OMAP was going into retention.
> 
FYI:

xorg.conf's Option "SuspendTime" seems to equal to blanking command 3
(VESA_POWERDOWN). Look drivers/video/omap/omapfb_main.c: omapfb_blank.

Section "ServerFlags"
        Option  "BlankTime"     "0"
        Option  "StandbyTime"   "0"
        Option  "SuspendTime"   "1"
        Option  "OffTime"       "0"
EndSection

I just tried this with xserver-xorg-video-fbdev from Debian/testing on
N800 and it went perfectly into retention. N810 didn't went and think
reason is that bootloader enables UART3 for the GPS chip.

Oh my, I always tought there is some magic between Xomap and omapfb how
the fb clocks are shutdown but lazy me newer bothered to check it from
kernel sources :-)


Jarkko

Re: N810 suspend

[Felipe Contreras]

On Thu, Dec 18, 2008 at 9:01 AM, Jarkko Nikula <jarkko.nikula@nokia.com> wrote:
> On Wed, 17 Dec 2008 14:09:11 +0200
> "ext Jarkko Nikula" <jarkko.nikula@nokia.com> wrote:
>
>> On Tue, 16 Dec 2008 09:22:38 -0800
>> "ext Tony Lindgren" <tony@atomide.com> wrote:
>>
>> > > > Oh, I just tested that sleep-while-idle worked when fb was blanked. I
>> > > > had a script that forced the LCD off via /sys, sorry don't remember
>> > > > the path now. Will be also heading to catch a plane in few hours, may
>> > > > not be able to check it right now.
>> > >
>> > > 'echo 3 > /sys/class/graphics/fb0/blank' turns off the LCD, if that is what you
>> > > mean.
>> >
>> > Thanks, that's what I did.
>> >
>> And it worked with N800. Battery current dropped below 10 mA after
>> unplugging the USB cable so OMAP was going into retention.
>>
> FYI:
>
> xorg.conf's Option "SuspendTime" seems to equal to blanking command 3
> (VESA_POWERDOWN). Look drivers/video/omap/omapfb_main.c: omapfb_blank.

Yes, but it should be FB_BLANK_POWERDOWN (4), shouldn't it?

-- 
Felipe Contreras

Re: N810 suspend

[Jarkko Nikula]

On Thu, 18 Dec 2008 14:51:20 +0200
"ext Felipe Contreras" <felipe.contreras@gmail.com> wrote:

> > xorg.conf's Option "SuspendTime" seems to equal to blanking command 3
> > (VESA_POWERDOWN). Look drivers/video/omap/omapfb_main.c: omapfb_blank.
> 
> Yes, but it should be FB_BLANK_POWERDOWN (4), shouldn't it?
> 
Good question, no idea, probably yes? Only omapfb_main.c, fs1100fb.c
and au1100fb.c are using VESA_xxx and rest of the fb drivers
FB_BLANK_xxx modes.


Jarkko

Re: N810 suspend

[Kalle Valo]

Jarkko Nikula <jarkko.nikula@nokia.com> writes:

> xorg.conf's Option "SuspendTime" seems to equal to blanking command 3
> (VESA_POWERDOWN). Look drivers/video/omap/omapfb_main.c: omapfb_blank.
>
> Section "ServerFlags"
>         Option  "BlankTime"     "0"
>         Option  "StandbyTime"   "0"
>         Option  "SuspendTime"   "1"
>         Option  "OffTime"       "0"
> EndSection
>
> I just tried this with xserver-xorg-video-fbdev from Debian/testing on
> N800 and it went perfectly into retention.

Cool.

> N810 didn't went and think reason is that bootloader enables UART3
> for the GPS chip.

I noticed this as well. Any hacks to workaround this? Or do I really
need to start searching for N800? :)

-- 
Kalle Valo

Re: N810 suspend

[Paul Walmsley]

On Thu, 18 Dec 2008, Kalle Valo wrote:

> Jarkko Nikula <jarkko.nikula@nokia.com> writes:
> 
> > xorg.conf's Option "SuspendTime" seems to equal to blanking command 3
> > (VESA_POWERDOWN). Look drivers/video/omap/omapfb_main.c: omapfb_blank.
> >
> > Section "ServerFlags"
> >         Option  "BlankTime"     "0"
> >         Option  "StandbyTime"   "0"
> >         Option  "SuspendTime"   "1"
> >         Option  "OffTime"       "0"
> > EndSection
> >
> > I just tried this with xserver-xorg-video-fbdev from Debian/testing on
> > N800 and it went perfectly into retention.
> 
> Cool.
> 
> > N810 didn't went and think reason is that bootloader enables UART3
> > for the GPS chip.
> 
> I noticed this as well. Any hacks to workaround this? Or do I really
> need to start searching for N800? :)

hey Kevin,

did your serial port idle code ever work out?  I wonder if that would work 
for the N810s...


- Paul

Re: N810 suspend

[Kalle Valo]

"ext Paul Walmsley" <paul@pwsan.com> writes:

>> > N810 didn't went and think reason is that bootloader enables UART3
>> > for the GPS chip.
>> 
>> I noticed this as well. Any hacks to workaround this? Or do I really
>> need to start searching for N800? :)
>
> hey Kevin,
>
> did your serial port idle code ever work out?  I wonder if that would work 
> for the N810s...

Any patches anywhere? I would gladly test something.

-- 
Kalle Valo

Re: N810 suspend

[Kevin Hilman]

Kalle Valo <kalle.valo@nokia.com> writes:

> "ext Paul Walmsley" <paul@pwsan.com> writes:
>
>>> > N810 didn't went and think reason is that bootloader enables UART3
>>> > for the GPS chip.
>>> 
>>> I noticed this as well. Any hacks to workaround this? Or do I really
>>> need to start searching for N800? :)
>>
>> hey Kevin,
>>
>> did your serial port idle code ever work out?  I wonder if that would work 
>> for the N810s...
>
> Any patches anywhere? I would gladly test something.
>

The PM branch[1] has a set of UART patches which disable UART clocks
in the idle loop.  The clocks are disabled after an inactivity timer
(default 5 seconds of idle.)

I've tested the UART idle parts on n810 which seem to work, but
hitting retention on n810 seems broken in current linux-omap.  Tony
merged a patch[2] from me last week which was crashing going into
retention, but even with that I'm not able to wakeup from retention.

This could be something as simple as the wakeup event sources are not
configured correctly for n810, but I did not debug further.

Kevin


[1] Branch 'pm' in linux-omap tree
[1] http://marc.info/?l=linux-omap&m=122855013200342&w=2