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From: linus.ml.walleij@gmail.com (Linus Walleij)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH] ARM: add PrimeCell generic DMA to MMCI/PL180
Date: Tue, 1 Feb 2011 15:15:15 +0100	[thread overview]
Message-ID: <AANLkTi=TB+5aw-Yo3-8es3PLFSY=cf1RU7ws=zwv2Gj5@mail.gmail.com> (raw)
In-Reply-To: <20110201133036.GI31216@n2100.arm.linux.org.uk>

2011/2/1 Russell King - ARM Linux <linux@arm.linux.org.uk>:

> So, the solutions as I see it are:
>
> 1. If DMAREQCTL = 1, move the burst limiting work-around into the DMA
> ? engine driver, if it really is a problem.
>
> 2. Set DMAREQCTL = 0.
>
> (2) seems to be the most sane solution to me.

Let's go with that as indicated in other mail.

However the DMAREQCTL is an odd beast and I just cannot
wrap my head around it. It certainly isn't there to solve any
software problems, so I need to find some usecase for it.

Generating SDIO traffic with odd bytechunks isn't that easy
though.

Linus Walleij

      reply	other threads:[~2011-02-01 14:15 UTC|newest]

Thread overview: 18+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2010-10-06  9:42 [PATCH] ARM: add PrimeCell generic DMA to MMCI/PL180 Linus Walleij
2010-12-19 16:32 ` Russell King - ARM Linux
2010-12-19 19:59   ` Russell King - ARM Linux
2010-12-21 13:54     ` Russell King - ARM Linux
2010-12-21 15:59       ` Russell King - ARM Linux
2010-12-22 21:55         ` Linus Walleij
2011-01-24 16:01           ` Russell King - ARM Linux
2011-01-24 21:06             ` Linus Walleij
2011-01-24 21:22               ` Russell King - ARM Linux
2011-01-25  8:33                 ` Linus Walleij
2011-01-26  9:24                   ` Russell King - ARM Linux
2011-01-26  9:50                   ` Russell King - ARM Linux
2011-01-25  9:36                 ` Linus Walleij
2011-01-25  9:47                 ` Linus Walleij
2011-01-25 10:23                   ` Russell King - ARM Linux
2011-01-27 13:07                     ` Linus Walleij
2011-02-01 13:30                       ` Russell King - ARM Linux
2011-02-01 14:15                         ` Linus Walleij [this message]

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