From: Sakari Ailus <sakari.ailus@iki.fi>
To: anish singh <anish198519851985@gmail.com>
Cc: Enrico <ebutera@users.berlios.de>,
linux-media@vger.kernel.org, t-kristo@ti.com
Subject: Re: omap3isp as a wakeup source
Date: Tue, 13 Sep 2011 09:49:32 +0300 [thread overview]
Message-ID: <4E6EFCFC.5030803@iki.fi> (raw)
In-Reply-To: <CAK7N6vpr8uJSHMgTnrd=FrnvYf_Oqy8D3ua__S63T3nEvqaKGw@mail.gmail.com>
anish singh wrote:
> On Tue, Sep 13, 2011 at 1:58 AM, Sakari Ailus <sakari.ailus@iki.fi> wrote:
>> On Mon, Sep 12, 2011 at 04:50:42PM +0200, Enrico wrote:
>>> Hi,
>>
>> Hi Enrico,
>>
>>> While testing omap3isp+tvp5150 with latest Deepthy bt656 patches
>>> (kernel 3.1rc4) i noticed that yavta hangs very often when grabbing
>>> or, if not hanged, it grabs at max ~10fps.
>>>
>>> Then i noticed that tapping on the (serial) console made it "unblock"
>>> for some frames, so i thought it doesn't prevent the cpu to go
>>> idle/sleep. Using the boot arg "nohlt" the problem disappear and it
>>> grabs at a steady 25fps.
>>>
>>> In the code i found a comment that says the camera can't be a wakeup
>>> source but the camera powerdomain is instead used to decide to not go
>>> idle, so at this point i think the camera powerdomain is not enabled
>>> but i don't know how/where to enable it. Any ideas?
>>
>> I can confirm this indeed is the case --- ISP can't wake up the system ---
>> but don't know how to prevent the system from going to sleep when using the
>> ISP.
> Had it been on android i think wakelock would have been very useful.
I believe there are proper means to do this using more standard methods
as well. Not being a PM expert, I don't know how.
Cc Tero.
--
Sakari Ailus
sakari.ailus@iki.fi
next prev parent reply other threads:[~2011-09-13 6:48 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-09-12 14:50 omap3isp as a wakeup source Enrico
2011-09-12 20:28 ` Sakari Ailus
2011-09-13 6:25 ` anish singh
2011-09-13 6:49 ` Sakari Ailus [this message]
2011-09-13 9:48 ` Tero Kristo
2011-09-13 10:08 ` Enrico
2011-09-13 10:29 ` Tero Kristo
2011-09-13 13:25 ` Enrico
2011-09-20 9:19 ` Enrico
2011-09-13 10:28 ` Enrico
2011-09-13 11:28 ` Sakari Ailus
2011-09-13 9:08 ` Laurent Pinchart
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