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From: Aaro Koskinen <aaro.koskinen@iki.fi>
To: Russell King - ARM Linux <linux@armlinux.org.uk>
Cc: Peter Ujfalusi <peter.ujfalusi@ti.com>,
	vkoul@kernel.org, dan.j.williams@intel.com,
	dmaengine@vger.kernel.org, linux-kernel@vger.kernel.org,
	tony@atomide.com, linux-omap@vger.kernel.org
Subject: Re: [PATCH] dmaengine: ti: omap-dma: Configure LCH_TYPE for OMAP1
Date: Fri, 23 Nov 2018 00:24:26 +0200	[thread overview]
Message-ID: <20181122222426.GC11423@darkstar.musicnaut.iki.fi> (raw)
In-Reply-To: <20181122151236.GA9611@n2100.armlinux.org.uk>

Hi,

On Thu, Nov 22, 2018 at 03:12:36PM +0000, Russell King - ARM Linux wrote:
> On Thu, Nov 22, 2018 at 10:29:48AM +0000, Russell King - ARM Linux wrote:
> > On Tue, Nov 20, 2018 at 11:04:06PM +0200, Aaro Koskinen wrote:
> > > I had switched to PIO mode in 2015 since the WARNs about legacy DMA
> > > API were too annoying and flooding the console. And now that I tried
> > > using DMA again with g_ether, it doesn't work anymore. The device get's
> > > recognized on host side, but no traffic goes through. Switching back to
> > > PIO makes it to work again.
> > 
> > A solution to that would be to do what the warning message says, and
> > update the driver to the DMAengine API.

Fully agreed, but I was busy debugging other more serious issues, and
just wanted to get a reliable ssh or USB serial access to the device
without any extra noise, so switching to PIO using a module parameter
is probably what most users do in such situations.

> Here's a partial conversion (not even build tested) - it only supports
> OUT transfers with dmaengine at the moment.

Thanks, I'll take a closer look and try to do some testing hopefully
during the weekend.

A.

  reply	other threads:[~2018-11-22 22:24 UTC|newest]

Thread overview: 34+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-11-19 10:40 [PATCH] dmaengine: ti: omap-dma: Configure LCH_TYPE for OMAP1 Peter Ujfalusi
2018-11-19 18:46 ` Aaro Koskinen
2018-11-20  7:28   ` Peter Ujfalusi
2018-11-20 21:04     ` Aaro Koskinen
2018-11-22  8:31       ` Peter Ujfalusi
2018-11-22 22:01         ` Aaro Koskinen
2018-11-23 11:45           ` Peter Ujfalusi
2018-11-24  0:17             ` Aaro Koskinen
2018-11-24 17:48               ` Russell King - ARM Linux
2018-11-24 19:06                 ` Aaro Koskinen
2018-11-24 19:29                   ` Russell King - ARM Linux
2018-11-22 10:29       ` Russell King - ARM Linux
2018-11-22 15:12         ` Russell King - ARM Linux
2018-11-22 22:24           ` Aaro Koskinen [this message]
2018-11-23  0:25             ` Russell King - ARM Linux
2018-11-23  1:23               ` Aaro Koskinen
2018-11-23 11:54               ` Peter Ujfalusi
2018-11-23 12:35           ` Peter Ujfalusi
2018-11-23 15:43             ` Russell King - ARM Linux
2018-11-23 16:16               ` Russell King - ARM Linux
2018-11-23 23:27                 ` Russell King - ARM Linux
2018-11-23 18:52             ` Aaro Koskinen
2018-11-24 20:09               ` Russell King - ARM Linux
2018-11-25  1:07                 ` Tony Lindgren
2018-11-25  1:11                   ` Tony Lindgren
2018-11-25 11:11                   ` Russell King - ARM Linux
2018-11-25 11:57                     ` Russell King - ARM Linux
2018-11-25 16:58                     ` Aaro Koskinen
2018-11-25 17:14                       ` Tony Lindgren
2018-12-17 23:47                         ` Aaro Koskinen
2018-12-18 15:55                           ` Tony Lindgren
2018-12-17 19:16           ` Aaro Koskinen
2018-12-18 10:11             ` Peter Ujfalusi
2018-11-23 11:49         ` Peter Ujfalusi

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