From: Haavard Skinnemoen <haavard.skinnemoen@atmel.com>
To: Hans-Christian Egtvedt <hans-christian.egtvedt@atmel.com>
Cc: linux-kernel@vger.kernel.org, dan.j.williams@intel.com,
maciej.sosnowski@intel.com,
Hans-Christian Egtvedt <hans-christian.egtvedt@atmel.com>
Subject: Re: [PATCH v3 1/1] dw_dmac: add cyclic API to DW DMA driver
Date: Wed, 1 Apr 2009 15:52:05 +0200 [thread overview]
Message-ID: <20090401155205.1f47ccc4@hskinnemoen-d830> (raw)
In-Reply-To: <1238593622-17809-1-git-send-email-hans-christian.egtvedt@atmel.com>
Hans-Christian Egtvedt wrote:
> This patch adds a cyclic DMA interface to the DW DMA driver. This is
> very useful if you want to use the DMA controller in combination with a
> sound device which uses cyclic buffers.
>
> Using a DMA channel for cyclic DMA will disable the possibility to use
> it as a normal DMA engine until the user calls the cyclic free function
> on the DMA channel. Also a cyclic DMA list can not be prepared if the
> channel is already active.
>
> Signed-off-by: Hans-Christian Egtvedt <hans-christian.egtvedt@atmel.com>
Acked-by: Haavard Skinnemoen <haavard.skinnemoen@atmel.com>
next prev parent reply other threads:[~2009-04-01 13:53 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-03-24 11:35 [PATCH 1/2] dw_dmac: set CAP_PRIVATE capability for DW DMA controller Hans-Christian Egtvedt
2009-03-24 11:35 ` [PATCH 2/2] dw_dmac: add cyclic API to DW DMA driver Hans-Christian Egtvedt
2009-03-31 14:02 ` Sosnowski, Maciej
2009-03-31 14:03 ` Sosnowski, Maciej
2009-04-01 5:10 ` Hans-Christian Egtvedt
2009-04-01 8:28 ` Haavard Skinnemoen
2009-04-01 9:11 ` Hans-Christian Egtvedt
2009-04-01 13:28 ` [PATCH v2 1/1] " Hans-Christian Egtvedt
2009-04-01 13:39 ` Haavard Skinnemoen
2009-04-01 13:47 ` [PATCH v3 " Hans-Christian Egtvedt
2009-04-01 13:52 ` Haavard Skinnemoen [this message]
2009-04-01 22:46 ` Dan Williams
2009-04-01 15:08 ` Sosnowski, Maciej
2009-03-31 14:01 ` [PATCH 1/2] dw_dmac: set CAP_PRIVATE capability for DW DMA controller Sosnowski, Maciej
2009-04-01 5:04 ` Hans-Christian Egtvedt
2009-04-01 5:30 ` Dan Williams
2009-04-01 8:33 ` Hans-Christian Egtvedt
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