Re: Omap3430 does not resume after suspend

[Kevin Hilman <khilman@deeprootsystems.com>]

Ramesh Gupta Guntha <grgupta77@gmail.com> writes:

> Hi Shreyas,
>
> On 2/4/09, Shreyas Mahajan <mahajan.shreyas@gmail.com> wrote:
>>  Hi,
>>    Thanks for constantly tolerating my ignorance. I git-cloned the
>> latest PM tree available and booted my 3430 LDP board with ldp
>> defconfig configuration. Now the problem regarding hanging of machine
>> after some small interval is solved but when I done 'echo mem
>> >/sys/power/state' it gives error to suspend,
>> This is log for it,
>>
>> '/ # echo mem > /sys/power/state
>> <6>PM: Syncing filesystems ... PM: Syncing filesystems ... done.
>> done.
>> Freezing user space processes ... Freezing user space processes ...
>> (elapsed 0.00 seconds) (elapsed 0.00 seconds) done.
>> done.
>> Freezing remaining freezable tasks ... Freezing remaining freezable
>> tasks ... (elapsed 0� )����r$�Powerdomain (core_pwrdm) d1
>> Powerdomain (per_pwrdm) didn't enter target state 1
>>             �*43
>> Could not enter target state in pm_suspendend to debug)
>> � 1�ռ���, 森�Ѡr��
>> Restarting tasks ... Restarting tasks ... done.%�������� J$�4%�% Ѵ�*43
>> done.F�󰯅)������������ J$�4%�% Ѵ�*43
>> '
>> I searched similar problems on mailing list, in which suspend log
>> contains exactly which process could not be stopped as reason to
>> suspend failure. But in above log, I could not interpret such a
>> reason.
>>         Could anyone please help me with this?
>
> Please look into below mail thread on the PM off mode support in l-o list.
>
> http://www.mail-archive.com/linux-omap@vger.kernel.org/msg08968.html
>
> If you are trying it on SDP , use u-boot mentioned in the above link.
>
>
> use below settings before running echo mem > /sys/power/state for off mode.
>
> echo 1 > /sys/power/clocks_off_while_idle
> echo 1 > /sys/power/voltage_off_while_idle
> echo 1 > /sys/power/enable_off_mode
>
>
> I tried it on my SDP with omap_3430sdp_min_defconfig, I am seeing all
> the domains entering to OFF mode.
>

In addition to above, I suggest you turn of CONFIG_DEBUG_LL as well as
that will clutter up your serial console with garbage during
suspend/resume.

Kevin
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