From: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
To: Mauro Carvalho Chehab <mchehab@redhat.com>
Cc: Devin Heitmueller <dheitmueller@kernellabs.com>,
linux-media@vger.kernel.org, srinivasa.deevi@conexant.com,
Maxime Ripard <maxime.ripard@free-electrons.com>
Subject: Re: cx231xx: DMA problem on ARM
Date: Mon, 26 Sep 2011 10:13:23 +0200 [thread overview]
Message-ID: <20110926101323.41708d64@skate> (raw)
In-Reply-To: <4E7D3D5A.6030008@redhat.com>
Hello Mauro,
Le Fri, 23 Sep 2011 23:15:54 -0300,
Mauro Carvalho Chehab <mchehab@redhat.com> a écrit :
> > And still the result is the same: we get a first frame, and then
> > nothing more, and we have a large number of error messages in the
> > kernel logs.
>
> I don't think that this is related to the power manager anymore. It can
> be related to cache coherency and/or to iommu support.
As you suspected, increasing PWR_SLEEP_INTERVAL didn't change anything.
What do you suggest to track down the potential cache coherency issues ?
Best regards,
Thomas
--
Thomas Petazzoni, Free Electrons
Kernel, drivers, real-time and embedded Linux
development, consulting, training and support.
http://free-electrons.com
next prev parent reply other threads:[~2011-09-26 8:13 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-09-21 11:56 cx231xx: DMA problem on ARM Thomas Petazzoni
2011-09-21 12:04 ` Devin Heitmueller
2011-09-21 19:17 ` Thomas Petazzoni
2011-09-22 14:45 ` Thomas Petazzoni
2011-09-22 15:09 ` Devin Heitmueller
2011-09-22 15:29 ` Thomas Petazzoni
2011-09-23 12:04 ` Thomas Petazzoni
2011-09-23 12:26 ` Sri Deevi
2011-09-24 18:04 ` Thomas Petazzoni
2011-09-24 2:15 ` Mauro Carvalho Chehab
2011-09-26 8:13 ` Thomas Petazzoni [this message]
2011-09-26 17:32 ` Mauro Carvalho Chehab
2011-09-26 19:02 ` Laurent Pinchart
2011-09-26 19:59 ` Thomas Petazzoni
2011-09-26 20:03 ` Mauro Carvalho Chehab
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