Re: 3.5-rc3: PM/DSS broken (was vdd_mpu_iva warnings)

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On 3 July 2012 16:29, Archit Taneja <a0393947@xxxxxx> wrote:
>
> I was going through Tomi's queue for the 3.6 merge window:
>
> git://gitorious.org/linux-omap-dss2/linux.git master
>
> There is a commit called:
>
> 2b8501d777346ce1d4fe99167e9b3c0e42aae7a8
>
> OMAPDSS: Use PM notifiers for system suspend
>
> The commit message mentions the issue you see, and seems to resolve it.
> Could you give this a try?
>
> Tomi is out on vacation, and I don't know why this wasn't intended for the
> 3.5-rcs, maybe there are still some discussion going on about this?
>
> Copping Jassi who was involved with this commit.
>
I understand, we settled on that patch finally.

>>>
>>> The error returned from the runtime_resume call is -ENOACCES, which by
>>> looking at the code, is returned by rpm_resume() when:
>>>
>>>         dev->power.disable_depth>  0
>>>
>>> I don't know what that means, does someone have any idea?
>>>
That is because during suspend PM on DISPC is disabled, so any attempt
to enable it reports ACCESS error. I suggested a mechanism, but Tomi
instead wanted to suspend early and resume late the panels via
notifiers to avoid that scenario.
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