From: Tony Lindgren <tony@atomide.com>
To: Shubhrajyoti <shubhrajyoti@ti.com>
Cc: spi-devel-general@lists.sourceforge.net,
linux-omap@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] spi: omap2-mcspi: In case of dma errors fall back to pio
Date: Tue, 7 Aug 2012 05:02:27 -0700 [thread overview]
Message-ID: <20120807120227.GA11011@atomide.com> (raw)
In-Reply-To: <5020FA2C.2020707@ti.com>
* Shubhrajyoti <shubhrajyoti@ti.com> [120807 04:21]:
> On Tuesday 07 August 2012 01:17 PM, Tony Lindgren wrote:
> >> };
> > Don't you need to check separately for rx and tx dma? There's a slight
> > chance that you get a channel for one but not for the other..
> In that case I treat it as non usable and fall back to pio.
OK that should work too.
> Are you suggesting that let one channel be dma and only the failed one pio?
I guess both are doable. For reduced CPU load using DMA where possible
of course is the best way to go.
Tony
next prev parent reply other threads:[~2012-08-07 12:02 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-07-25 6:20 [PATCH] spi: omap2-mcspi: In case of dma errors fall back to pio Shubhrajyoti D
2012-08-07 7:47 ` Tony Lindgren
2012-08-07 11:21 ` Shubhrajyoti
2012-08-07 12:02 ` Tony Lindgren [this message]
2012-08-07 12:21 ` Felipe Balbi
[not found] ` <1343197229-15188-1-git-send-email-shubhrajyoti-l0cyMroinI0@public.gmane.org>
2012-08-08 14:39 ` Philip, Avinash
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