From: linux@arm.linux.org.uk (Russell King - ARM Linux)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH v3 09/12] ASoC: dmaengine_pcm: add snd_dmaengine_generic_pcm_open()
Date: Wed, 6 Mar 2013 17:13:33 +0000 [thread overview]
Message-ID: <20130306171333.GR17833@n2100.arm.linux.org.uk> (raw)
In-Reply-To: <1362494247-28909-1-git-send-email-shawn.guo@linaro.org>
On Tue, Mar 05, 2013 at 10:37:27PM +0800, Shawn Guo wrote:
> With generic DMA device tree binding and helper function
> dma_request_slave_channel() in place, dmaengine_pcm should support
> that in requesting DMA channel for users that support generic DMA
> device tree binding.
This purpetuates the brain-dead behaviour of the existing ASoC DMA
engine layer, which makes it unsuitable for platforms with special DMA
memory requirements.
The problem is that the DMA mask to be used for allocating DMA-able
memory is the DMA engine struct device, not the struct device associated
with the ASoC device.
I got this right in my ASoC generic DMA engine layer. Converting this
layer is far from trivial though, and as my test platform has now become
my entire network firewall, I'm not doing any testing on that anymore.
next prev parent reply other threads:[~2013-03-06 17:13 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-03-05 12:23 [PATCH v2 00/12] ARM: mxs: move to generic DMA device tree binding Shawn Guo
2013-03-05 12:23 ` [PATCH v2 01/12] ARM: dts: add generic DMA device tree binding for mxs-dma Shawn Guo
2013-03-05 19:38 ` Arnd Bergmann
2013-03-06 5:10 ` Shawn Guo
2013-03-05 12:23 ` [PATCH v2 02/12] dma: mxs-dma: use devm_* managed functions Shawn Guo
2013-03-05 12:23 ` [PATCH v2 03/12] dma: mxs-dma: move to generic device tree binding Shawn Guo
2013-03-05 12:23 ` [PATCH v2 04/12] mmc: mxs-mmc: move to use generic DMA helper Shawn Guo
2013-03-05 12:23 ` [PATCH v2 05/12] spi: mxs-spi: " Shawn Guo
2013-03-05 12:23 ` [PATCH v2 06/12] i2c: i2c-mxs: " Shawn Guo
2013-03-21 11:07 ` Wolfram Sang
2013-03-05 12:23 ` [PATCH v2 07/12] mtd: gpmi: " Shawn Guo
2013-03-05 12:24 ` [PATCH v2 08/12] serial: mxs-auart: " Shawn Guo
2013-03-06 1:36 ` Greg Kroah-Hartman
2013-03-05 12:24 ` [PATCH v2 09/12] ASoC: dmaengine_pcm: add snd_dmaengine_generic_pcm_open() Shawn Guo
2013-03-05 14:37 ` [PATCH v3 " Shawn Guo
2013-03-05 23:28 ` Marek Vasut
2013-03-06 5:11 ` Shawn Guo
2013-03-06 16:41 ` Marek Vasut
2013-03-06 17:13 ` Russell King - ARM Linux [this message]
2013-03-07 2:33 ` Mark Brown
2013-03-07 9:18 ` Russell King - ARM Linux
2013-03-07 9:31 ` Mark Brown
2013-03-07 11:20 ` Russell King - ARM Linux
2013-03-08 7:43 ` Mark Brown
2013-03-05 12:24 ` [PATCH v2 10/12] ASoC: mxs: move to use generic DMA helper Shawn Guo
2013-03-05 12:24 ` [PATCH v2 11/12] dma: mxs-dma: remove code left from generic DMA binding conversion Shawn Guo
2013-03-05 12:24 ` [PATCH v2 12/12] ARM: dts: remove old DMA binding data from client nodes Shawn Guo
2013-03-05 19:39 ` [PATCH v2 00/12] ARM: mxs: move to generic DMA device tree binding Arnd Bergmann
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