RE: PM branch rebased to 2.6.29... for real this time

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> -----Original Message-----
> From: Kevin Hilman [mailto:khilman@xxxxxxxxxxxxxxxxxxx] 
> Sent: Wednesday, April 01, 2009 10:42 AM
> To: Premi, Sanjeev
> Cc: linux-omap@xxxxxxxxxxxxxxx; Nayak, Rajendra
> Subject: Re: PM branch rebased to 2.6.29... for real this time
> 
> "Premi, Sanjeev" <premi@xxxxxx> writes:
> 
> >> -----Original Message-----
> >> From: linux-omap-owner@xxxxxxxxxxxxxxx 
> >> [mailto:linux-omap-owner@xxxxxxxxxxxxxxx] On Behalf Of Kevin Hilman
> >> Sent: Thursday, March 26, 2009 4:26 AM
> >> To: linux-omap@xxxxxxxxxxxxxxx
> >> Subject: PM branch rebased to 2.6.29... for real this time
> >> 
> >> Hello,
> >> 
> >> The previous rebase was actually to 2.6.29-rc8.  Now that 2.6.29 is
> >> out, I've rebased the PM brach onto linux-omap HEAD just after the
> >> 2.6.29 merge.
> >> 
> >> Minimal retention and off-mode on Beagle and RX51.
> >
> > Another problem that I found on OMAP3EVM:
> >
> > When I compiled in CPUidle and CPUfreq (over omap3_evm_defconfig),
> > the kernel did not boot-up. The last few statements are:
> 
> There are known problems with CPUfreq on top of the new clock
> notifiers series.
> 
> I am waiting for Rajendra to re-send his series which removes the virt
> clocks on top of the latest PM branch.
> 
> > <3>clock: dpll5_ck failed transition to 'locked'
> > clock: dpll5_ck failed transition to 'locked'
> > <6>Disabling unused clock "dpll4_m6x2_ck"
> > Disabling unused clock "dpll4_m6x2_ck"
> > <6>Disabling unused clock "dpll3_m3x2_ck"
> > Disabling unused clock "dpll3_m3x2_ck"
> > <6>Disabling unused clock "sys_clkout1"
> > Disabling unused clock "sys_clkout1"
> >
> > The PC is at the WFI statement.
> >
> > Tried other combinations as well:
> >
> > 1) only CPUidle enabled - okay.
> > 2) only CPUfreq enabled - not okay.
> >
> 
> Sounds to me like CPUfreq is changing frequencies during bootup.  Did
> you select ondemand as the default CPUfreq governor?

[sp] Yes. This is what I feel too. Only I was not clear why the process
gets stuck at WFI. Haven't been able to debug further. So far...

> If so, can you try with performance as the default governor.

[sp] It was performance governor only.

> If you're already using performance, then u-boot is setting a slower
> speed and CPUfreq may decide to change it during boot.

[sp] That is the case.

>  If so, can you
> try the userspace governor as the default governor.  This should
> prevent any automatic CPUFreq changes during bootup.
> 
> Kevin
> 
> 
> 
> 
> --
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