Re: [RFC 1/1] omap3: PM: MPU and CORE should stay awake if there is CAM domain ACTIVE

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Hi Kevin, Paul,

On Fri, Jan 27, 2012 at 3:03 PM, Sakari Ailus <sakari.ailus@xxxxxx> wrote:
> Hi Jean,
>
> Thanks for you quick reply.
>
> On Fri, Jan 27, 2012 at 12:06:37PM +0100, Jean Pihet wrote:
>> Hi,
>>
>> On Fri, Jan 27, 2012 at 11:00 AM, Sakari Ailus <sakari.ailus@xxxxxx> wrote:
>> > MPU and CORE should stay awake if there is CAM domain ACTIVE. This is
>> > because that module doesn't have wake-up capability.
>> >
>> > The original patch was written by Jouni Högander in 2008 and this is the
>> > last part left of it which is not in upstream yet.
>> >
>> > I wonder if the approach taken in the patch is valid these days;
>> > nevertheless it seems to do the job...
>> The code in the function omap3_enter_idle_bm from
>> arch/arm/mach-omap2/cpuidle34xx.c is doing exactly the same thing: it
>> is choosing the cpuidle safe_state if the CAM power domain is active.
>>
>> Please note that this only works if CPU_IDLE is selected, which is
>> needed to reach any decent low power mode.
>
> I didn't have CONFIG_CPU_IDLE selected --- it works if I enable it. But
> still it should work even if it's disabled I guess.
What is your call on this?

Regards,
Jean

>
> Kind regards,
>
> --
> Sakari Ailus
> e-mail: sakari.ailus@xxxxxx     jabber/XMPP/Gmail: sailus@xxxxxxxxxxxxxx
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