From: Timur Tabi <timur@freescale.com>
To: Sebastian Siewior <linuxppc-embedded@ml.breakpoint.cc>
Cc: linuxppc-embedded@ozlabs.org
Subject: Re: Using the loop feature of the DMA controller on MPC8544 DS
Date: Wed, 12 Mar 2008 15:49:50 -0500 [thread overview]
Message-ID: <47D841EE.2060806@freescale.com> (raw)
In-Reply-To: <20080312204451.GA11426@Chamillionaire.breakpoint.cc>
Sebastian Siewior wrote:
> Do you recommend another solution? Or did I miss an important part of
> the API that solves this kind of problem.
Well, I need to solve this problem myself, but I wasn't planning on doing it for
a while since I have a higher priority assignment at the moment. My 8610 sound
driver does DMA all on its own and completely ignores Zhang's driver, so I need
to fix that.
Unfortunately, I'm not familiar with Zhang's driver at all (it's changed too
much since I last looked at it), so I don't know what the *best* way is. For my
sound driver, I don't even know if I'll be able to leverage Zhang's driver at
all, since I need to use a specific DMA channel, and I need to control each of
the link descriptors. Zhang's driver abstracts DMA too much. So all I was
going to do is come up with a way to reserve channels.
--
Timur Tabi
Linux kernel developer at Freescale
next prev parent reply other threads:[~2008-03-12 20:50 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-03-12 12:34 Using the loop feature of the DMA controller on MPC8544 DS Sebastian Siewior
2008-03-12 15:58 ` Timur Tabi
2008-03-12 17:20 ` Sebastian Siewior
2008-03-12 18:47 ` Timur Tabi
2008-03-12 20:44 ` Sebastian Siewior
2008-03-12 20:49 ` Timur Tabi [this message]
2008-03-12 21:15 ` Sebastian Siewior
2008-03-12 21:16 ` Timur Tabi
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