Re: DSS2/PM on 3.2 broken?

[Archit <a0393947@ti.com>]

Hi,

On Wednesday 11 January 2012 09:43 PM, Joe Woodward wrote:
> -----Original Message-----
> From: Archit<a0393947@ti.com>
> To: Joe Woodward<jw@terrafix.co.uk>
> Cc: Paul Walmsley<paul@pwsan.com>, NeilBrown<neilb@suse.de>,<khilman@ti.com>,<linux-omap@vger.kernel.org>, Tomi Valkeinen
> <tomi.valkeinen@ti.com>
> Date: Wed, 11 Jan 2012 21:22:00 +0530
> Subject: Re: DSS2/PM on 3.2 broken?
>
>> Hi,
>>
>> On Wednesday 11 January 2012 08:45 PM, Joe Woodward wrote:
>>> ...snip...
>>>
>>>>
>>>> Could you enable omapdss debug by adding 'omapdss.debug=1 debug' in
>>>> your bootargs and share logs?
>>>

<snip>

>> Archit
>
> I'm not 100% sure what you mean for mmount -t debugfs debugfs /sys/kernel/debuge to do here?
>
> Do you mean to halt the kernel after suspending, but before resuming? If so, how would I go about doing this?
>

I'd asked for reboot or power off as you have done below. The suspend 
path looks okay, I asked for the power off to see if there was a 
dss_runtime_get() was called at the wrong time by some interrupt while 
suspending.

One difference between the shutdown and suspend logs is that we don't 
see the prints 'omapdss DSS: dss_save_context' and 'omapdss DSS: context 
saved', that seems a bit fishy.

I'm not sure how to go ahead from here. We haven't seen this on OMAP4, 
and I don't think I have tried this on OAMP3. Maybe Tomi has more ideas.

Archit

> If I just reboot or poweroff I get the following...
>
> # poweroff
> The system is going down NOW!
> Sent SIGTERM to all processes
> Sent SIGKILL to all processes
> Requesting system poweroff
> [   43.310607] omapdss CORE: shutdown
> [   43.499053] omapdss DISPC: dispc_runtime_put
> [   43.504272] omapdss DISPC: dispc_save_context
> [   43.509399] omapdss DISPC: context saved, ctx_loss_count 0
> [   43.515747] omapdss DSS: dss_runtime_put
> [   43.521453] omapdss DSS: dss_runtime_put
> [   43.527221] System halted.
>
> # reboot
> The system is going down NOW!
> Sent SIGTERM to all processes
> Sent SIGKILL to all processes
> Requesting system reboot
> [   25.652008] omapdss CORE: shutdown
> [   25.836120] omapdss DISPC: dispc_runtime_put
> [   25.841125] omapdss DISPC: dispc_save_context
> [   25.846221] omapdss DSS: dss_runtime_put
> [   25.851776] omapdss DISPC: context saved, ctx_loss_count 0
> [   25.857788] omapdss DSS: dss_runtime_put
> [   25.864074] Restarting system.
>
> Cheers,
> Joe
>
>