From: mfuzzey@parkeon.com (Martin Fuzzey)
To: linux-arm-kernel@lists.infradead.org
Subject: i.MX53 suspend to RAM
Date: Wed, 19 Mar 2014 14:52:58 +0100 [thread overview]
Message-ID: <5329A13A.7080307@parkeon.com> (raw)
In-Reply-To: <CAOMZO5Bg2zaGwptGwiVgagaCQCLDgMQfN=5_RwS0tLV0ketxPg@mail.gmail.com>
Hi Fabio,
On 16/03/14 15:39, Fabio Estevam wrote:
> I will try to stress test suspend/resume on mx53qsb and will let you know.
After doing some more digging it seems the problem is actually the
staging IPU driver imx-drm.
That driver currently has no suspend code and does not stop DMA.
If I remove the driver I can reliably suspend and resume (>500 cycles ok)
So sorry for the noise.
Are there any suspend/resume patches for that driver floating around?
I have tried to do something similar to the Freescale driver (wait for
DMA channels to idle then disable them)
but, while this also fixes the suspend/resume hang, there is sometimes
no or shifted display on resume.
Regards,
Martin
next prev parent reply other threads:[~2014-03-19 13:52 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-03-14 10:21 i.MX53 suspend to RAM Martin Fuzzey
2014-03-16 14:39 ` Fabio Estevam
2014-03-19 13:52 ` Martin Fuzzey [this message]
2014-03-19 16:27 ` Fabio Estevam
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