[Gta04-owner] Updates for 3.2-gta04 kernel.

[NeilBrown]

On Sun, 26 Feb 2012 11:30:03 +0000 Neil Jerram <neil at ossau.homelinux.net>
wrote:

> Neil Jerram <neil at ossau.homelinux.net> writes:
> 
> > NeilBrown <neilb at suse.de> writes:
> >
> >> I recommend compiling with
> >>    make gta04a3_nodebug_defconfig
> >>    make
> >>
> >> With all the debugging removed, my gta04 will wake from suspend in under 1
> >> second which is soooo much nicer than my freerunner.
> >
> > Will do, thanks.  Previously I've been using gta04a3_defconfig.
> 
> For some reason, with this new kernel, I don't get a working USB
> connection between phone and laptop.
> 
> On the phone, 'lsmod' indicates that 'g_ether' is loaded, and 'ifconfig'
> says that the usb0 interface is up and running, with the usual
> 192.168.0.202 address.  So I'd tend to think that the problem was at the
> laptop end - except that the laptop hasn't changed (or even rebooted)
> since a few minutes ago when I copied the new kernel and modules onto
> the phone.
> 
> Any thoughts?  It's not urgent; I can always revert to the previous
> kernel for the time being.

If you find time for a bit of experimenting, it might be useful to know:

 - does it work if you boot with the USB cable plugged in?
   if it does, does it keep working after 1, 2, 3 suspend cycles?
 - if you unplug and replug does it keep working?
 - if you unplug, suspend,resume,replug, does it work?
 - does it work if you boot without USB plugged in, then plug it in before
   any suspend?
   What about if you plug it in after the first suspend (thus triggering a
   resume)?
   How about after a suspend then resume?

It has always worked for me when I boot with USB plugged in (common case for
me), but occasionally not if I plug in at some later point.  I haven't
narrowed down the exact circumstance yet.

Also: if you go back to gta04a3_defconfig but keep the same kernel otherwise,
does the behaviour change?

I'm guessing we are losing interrupts from the twl4030 again.  It seems that
hacks and work-arounds aren't really enough (not surprising really).

Thanks,
NeilBrown
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