From: Shawn Guo <shawn.guo@linaro.org>
To: Nicolin Chen <nicoleotsuka@gmail.com>
Cc: mark.rutland@arm.com, devicetree@vger.kernel.org,
alsa-devel@alsa-project.org, b42378@freescale.com,
timur@tabi.org, pawel.moll@arm.com,
ijc+devicetree@hellion.org.uk, tiwai@suse.de,
linux-kernel@vger.kernel.org, rdunlap@infradead.org,
b02247@freescale.com, lgirdwood@gmail.com, robh+dt@kernel.org,
perex@perex.cz, broonie@kernel.org, galak@codeaurora.org,
grant.likely@linaro.org, linuxppc-dev@lists.ozlabs.org
Subject: Re: [PATCH v2 1/2] ARM: imx: Add the secondary request into the structure for imx-sdma
Date: Thu, 24 Jul 2014 21:30:04 +0800 [thread overview]
Message-ID: <20140724133002.GC6827@dragon> (raw)
In-Reply-To: <e47c36814695fd8c88ef063a9771cf097a128ec0.1406189745.git.nicoleotsuka@gmail.com>
On Thu, Jul 24, 2014 at 04:35:28PM +0800, Nicolin Chen wrote:
> SDMA supports device to device (per_2_per) scripts to handle DMA transfering
> between two peripheral devices. The per_2_per script, however, needs two dma
> requests from two sides while the current structure only defined one request.
>
> So this patch just simply adds the secondary request so as to let SDMA and
> its user to add its implementation later.
>
> [ Both change in the SDMA driver and its users like Freescale ASRC ASoC driver
> should be taken along with this change in order to truly support per_2_per
> sciprts. However, we here make an expediency by adding this first so that
> we can add either side later since this patch won't break any function and
> meanwhile it can make merge window more smoothly: we don't need to apply the
> change inside dmaengine branch via ASoC tree any more. -- Nicolin ]
>
> Signed-off-by: Nicolin Chen <nicoleotsuka@gmail.com>
Acked-by: Shawn Guo <shawn.guo@linaro.org>
next prev parent reply other threads:[~2014-07-24 13:45 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-07-24 8:35 [PATCH v2 0/2] Add Freescale ASRC driver Nicolin Chen
2014-07-24 8:35 ` [PATCH v2 1/2] ARM: imx: Add the secondary request into the structure for imx-sdma Nicolin Chen
2014-07-24 13:30 ` Shawn Guo [this message]
2014-07-24 8:35 ` [PATCH v2 2/2] ASoC: fsl_asrc: Add ASRC ASoC CPU DAI and platform drivers Nicolin Chen
2014-07-24 15:20 ` Tobias Klauser
2014-07-25 2:05 ` Nicolin Chen
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