Re: Suspend to RAM broken on BeagleBoard ?

[Kevin Hilman <khilman@deeprootsystems.com>]

Thomas Petazzoni <thomas.petazzoni@free-electrons.com> writes:

> On Fri, 10 Sep 2010 14:54:23 -0700
> Kevin Hilman <khilman@deeprootsystems.com> wrote:
>
>> It's the CPUfreq driver that's failing to suspend.
>
> Ok.
>
>> Yes, CPUfreq is not supported in l-o master or pm-core (only in the
>> full pm branch.)  If you Kconfig out CPUfreq, this failure will go
>> away.
>
> Aah, yes, I forgot about this. I know it's temporary, but wouldn't it
> be good to disable CPUfreq in omap3_defconfig in this case ?

Yes.

> BTW, I'm now seeing:
>
> [   37.830596] Powerdomain (core_pwrdm) didn't enter target state 1
> [   37.830627] Powerdomain (dss_pwrdm) didn't enter target state 1
>
> when the system is woken up.

Looks like DSS has not been initialized, so is not hitting RET.

Do you have the DSS driver enabled and built-in?  Without this (and
until we have DSS converted to hwmod) the DSS HW is not in a state that
can hit the low power mode.  If the DSS driver is allowed to initialize,
even without a panel, it should set the DSS HW in a state that will then
allow RET.

Kevin