From: Dan Williams <dan.j.williams@intel.com>
To: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Cc: Anatolij Gustschin <agust@denx.de>,
Markus Niebel <Markus.Niebel@tqs.de>, Detlev Zundel <dzu@denx.de>,
linux-arm-kernel@lists.infradead.org,
linux-media@vger.kernel.org, "Koul, Vinod" <vinod.koul@intel.com>
Subject: Re: [PATCH 2/2 v2] dma: ipu_idmac: do not lose valid received data in the irq handler
Date: Mon, 14 Feb 2011 01:57:39 -0800 [thread overview]
Message-ID: <AANLkTinpP6hoy_cz7qb1+izjO6_LEeQDfVfVwB-QrRiu@mail.gmail.com> (raw)
In-Reply-To: <Pine.LNX.4.64.1102071740380.31738@axis700.grange>
On Mon, Feb 7, 2011 at 8:49 AM, Guennadi Liakhovetski
<g.liakhovetski@gmx.de> wrote:
> Ok, I've found the reason. Buffer number repeats, when there is an
> underrun, which is happening in my tests, when frames are arriving quickly
> enough, but the user-space is not fast enough to process them, e.g., when
> it is writing them to files over NFS or even just displaying on the LCD.
> Without your patch these underruns happen just as well, they just don't
> get recognised, because there's always one buffer delayed, so, the queue
> is never empty.
>
> Dan, please add my
>
> Reviewed-(and-tested-)by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Thanks, applied v2.
--
Dan
WARNING: multiple messages have this Message-ID (diff)
From: dan.j.williams@intel.com (Dan Williams)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH 2/2 v2] dma: ipu_idmac: do not lose valid received data in the irq handler
Date: Mon, 14 Feb 2011 01:57:39 -0800 [thread overview]
Message-ID: <AANLkTinpP6hoy_cz7qb1+izjO6_LEeQDfVfVwB-QrRiu@mail.gmail.com> (raw)
In-Reply-To: <Pine.LNX.4.64.1102071740380.31738@axis700.grange>
On Mon, Feb 7, 2011 at 8:49 AM, Guennadi Liakhovetski
<g.liakhovetski@gmx.de> wrote:
> Ok, I've found the reason. Buffer number repeats, when there is an
> underrun, which is happening in my tests, when frames are arriving quickly
> enough, but the user-space is not fast enough to process them, e.g., when
> it is writing them to files over NFS or even just displaying on the LCD.
> Without your patch these underruns happen just as well, they just don't
> get recognised, because there's always one buffer delayed, so, the queue
> is never empty.
>
> Dan, please add my
>
> Reviewed-(and-tested-)by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Thanks, applied v2.
--
Dan
next prev parent reply other threads:[~2011-02-14 9:57 UTC|newest]
Thread overview: 56+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-01-26 8:49 [PATCH 0/2] Fix issues with frame reception from CSI on i.MX31 Anatolij Gustschin
2011-01-26 8:49 ` Anatolij Gustschin
2011-01-26 8:49 ` [PATCH 1/2] v4l: soc-camera: start stream after queueing the buffers Anatolij Gustschin
2011-01-26 8:49 ` Anatolij Gustschin
2011-01-29 19:16 ` Guennadi Liakhovetski
2011-01-29 19:16 ` Guennadi Liakhovetski
2011-01-29 19:24 ` Anatolij Gustschin
2011-01-29 19:24 ` Anatolij Gustschin
2011-01-31 12:19 ` [PATCH 1/2 v2] " Anatolij Gustschin
2011-01-31 12:19 ` Anatolij Gustschin
2011-01-26 8:49 ` [PATCH 2/2] dma: ipu_idmac: do not lose valid received data in the irq handler Anatolij Gustschin
2011-01-26 8:49 ` Anatolij Gustschin
2011-01-27 8:22 ` Anatolij Gustschin
2011-01-27 8:22 ` Anatolij Gustschin
2011-01-31 5:56 ` Dan Williams
2011-01-31 5:56 ` Dan Williams
2011-01-31 12:22 ` [PATCH 2/2 v2] " Anatolij Gustschin
2011-01-31 12:22 ` Anatolij Gustschin
2011-02-03 10:09 ` Guennadi Liakhovetski
2011-02-03 10:09 ` Guennadi Liakhovetski
2011-02-04 9:19 ` Markus Niebel
2011-02-04 9:19 ` Markus Niebel
2011-02-04 9:37 ` Guennadi Liakhovetski
2011-02-04 9:37 ` Guennadi Liakhovetski
2011-02-04 11:37 ` Markus Niebel
2011-02-04 11:37 ` Markus Niebel
2011-02-04 9:35 ` Anatolij Gustschin
2011-02-04 9:35 ` Anatolij Gustschin
2011-02-05 13:35 ` Anatolij Gustschin
2011-02-05 13:35 ` Anatolij Gustschin
2011-02-05 16:36 ` Guennadi Liakhovetski
2011-02-05 16:36 ` Guennadi Liakhovetski
2011-02-05 20:04 ` Anatolij Gustschin
2011-02-05 20:04 ` Anatolij Gustschin
2011-02-07 11:09 ` Guennadi Liakhovetski
2011-02-07 11:09 ` Guennadi Liakhovetski
2011-02-07 11:21 ` Anatolij Gustschin
2011-02-07 11:21 ` Anatolij Gustschin
2011-02-07 11:35 ` Guennadi Liakhovetski
2011-02-07 11:35 ` Guennadi Liakhovetski
2011-02-07 13:01 ` Detlev Zundel
2011-02-07 13:01 ` Detlev Zundel
2011-02-07 13:35 ` Guennadi Liakhovetski
2011-02-07 13:35 ` Guennadi Liakhovetski
2011-02-07 14:43 ` Detlev Zundel
2011-02-07 14:43 ` Detlev Zundel
2011-02-07 13:45 ` Anatolij Gustschin
2011-02-07 13:45 ` Anatolij Gustschin
2011-02-07 14:00 ` Guennadi Liakhovetski
2011-02-07 14:00 ` Guennadi Liakhovetski
2011-02-07 16:49 ` Guennadi Liakhovetski
2011-02-07 16:49 ` Guennadi Liakhovetski
2011-02-14 9:57 ` Dan Williams [this message]
2011-02-14 9:57 ` Dan Williams
2011-01-28 7:46 ` [PATCH 0/2] Fix issues with frame reception from CSI on i.MX31 Anatolij Gustschin
2011-01-28 7:46 ` Anatolij Gustschin
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