From: Mark Brown <broonie@opensource.wolfsonmicro.com>
To: Tomoya MORINAGA <tomoya.rohm@gmail.com>
Cc: Vinod Koul <vinod.koul@linux.intel.com>,
lars@metafoo.de, Takashi Iwai <tiwai@suse.de>,
alsa-devel@alsa-project.org, linux-kernel@vger.kernel.org,
Liam Girdwood <lrg@ti.com>
Subject: Re: [PATCH v5] sound/soc/lapis: add platform driver for ML7213
Date: Thu, 31 May 2012 11:45:38 +0100 [thread overview]
Message-ID: <20120531104538.GA2666@opensource.wolfsonmicro.com> (raw)
In-Reply-To: <CANKRQni4uqQJ99ycOScHmn-g1kz2_XH7ePL+n1taG5jAbDSubw@mail.gmail.com>
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On Thu, May 31, 2012 at 02:38:30PM +0900, Tomoya MORINAGA wrote:
> On Wed, May 30, 2012 at 9:14 PM, Mark Brown
> > Please re-read what I wrote.
> Let me clarify.
> Do you say native DMA driver API like dmaengine_prep_slave_sg(),
> dmaengine_submit() shouldn't be used from ASoC driver, right ?
Your driver should be written in terms of the ASoC DMA framework.
> > No, all current mainline drivers using the library use cyclic DMA.
> I can't see any driver uses cyclic DMA. (I saw linux-next's tree from
> kernel.org.)
> Where is your saying "current mainline" ?
Linus' tree, or mine. Have you even looked at the soc-dmaengine-pcm
code? It uncondtionally requests a cyclic channel.
> However I think it seems difficult for supporting all devices.
> Because hardware dependency control code can't be added.
> For example, for ML7213, needs interrupt control both before/after DMA transfer.
> However, in case of using soc-dmaengine, the control can't be done.
> Because the processing is in soc-dmaengine.
Please be more specific. What are the concrete problems that you see?
Why is it not possible to address them within the framework?
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WARNING: multiple messages have this Message-ID (diff)
From: Mark Brown <broonie@opensource.wolfsonmicro.com>
To: Tomoya MORINAGA <tomoya.rohm@gmail.com>
Cc: Vinod Koul <vinod.koul@linux.intel.com>,
alsa-devel@alsa-project.org, lars@metafoo.de,
Takashi Iwai <tiwai@suse.de>,
linux-kernel@vger.kernel.org, Liam Girdwood <lrg@ti.com>
Subject: Re: [alsa-devel] [PATCH v5] sound/soc/lapis: add platform driver for ML7213
Date: Thu, 31 May 2012 11:45:38 +0100 [thread overview]
Message-ID: <20120531104538.GA2666@opensource.wolfsonmicro.com> (raw)
In-Reply-To: <CANKRQni4uqQJ99ycOScHmn-g1kz2_XH7ePL+n1taG5jAbDSubw@mail.gmail.com>
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On Thu, May 31, 2012 at 02:38:30PM +0900, Tomoya MORINAGA wrote:
> On Wed, May 30, 2012 at 9:14 PM, Mark Brown
> > Please re-read what I wrote.
> Let me clarify.
> Do you say native DMA driver API like dmaengine_prep_slave_sg(),
> dmaengine_submit() shouldn't be used from ASoC driver, right ?
Your driver should be written in terms of the ASoC DMA framework.
> > No, all current mainline drivers using the library use cyclic DMA.
> I can't see any driver uses cyclic DMA. (I saw linux-next's tree from
> kernel.org.)
> Where is your saying "current mainline" ?
Linus' tree, or mine. Have you even looked at the soc-dmaengine-pcm
code? It uncondtionally requests a cyclic channel.
> However I think it seems difficult for supporting all devices.
> Because hardware dependency control code can't be added.
> For example, for ML7213, needs interrupt control both before/after DMA transfer.
> However, in case of using soc-dmaengine, the control can't be done.
> Because the processing is in soc-dmaengine.
Please be more specific. What are the concrete problems that you see?
Why is it not possible to address them within the framework?
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next prev parent reply other threads:[~2012-05-31 10:45 UTC|newest]
Thread overview: 123+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-02-23 5:46 [PATCH v6] sound/soc/codecs: add LAPIS Semiconductor ML26124 Tomoya MORINAGA
2012-02-23 5:46 ` Tomoya MORINAGA
2012-02-23 5:46 ` [PATCH v3] sound/soc/lapis: add platform driver for ML7213 Tomoya MORINAGA
2012-02-23 5:46 ` Tomoya MORINAGA
2012-03-02 16:39 ` Mark Brown
2012-03-02 16:39 ` Mark Brown
2012-03-06 5:48 ` Tomoya MORINAGA
2012-03-06 11:52 ` Mark Brown
2012-03-06 11:52 ` Mark Brown
2012-03-07 1:30 ` Tomoya MORINAGA
2012-03-07 1:30 ` Tomoya MORINAGA
2012-03-07 11:46 ` Mark Brown
2012-03-07 11:46 ` Mark Brown
2012-03-08 2:06 ` Tomoya MORINAGA
2012-03-08 2:06 ` Tomoya MORINAGA
2012-03-08 11:05 ` Mark Brown
2012-03-08 11:05 ` Mark Brown
2012-03-09 6:26 ` Tomoya MORINAGA
2012-03-09 6:26 ` Tomoya MORINAGA
2012-03-09 6:39 ` [PATCH v4] " Tomoya MORINAGA
2012-03-19 12:00 ` [PATCH v5] " Tomoya MORINAGA
2012-03-19 12:00 ` Tomoya MORINAGA
2012-03-21 16:09 ` Mark Brown
2012-03-21 16:09 ` Mark Brown
2012-03-22 0:12 ` Tomoya MORINAGA
2012-03-26 15:40 ` Mark Brown
2012-03-26 15:40 ` Mark Brown
2012-05-23 4:17 ` Tomoya MORINAGA
2012-05-23 9:41 ` Mark Brown
2012-05-23 9:41 ` Mark Brown
2012-05-23 23:46 ` Tomoya MORINAGA
2012-05-23 23:46 ` Tomoya MORINAGA
2012-05-24 10:07 ` Mark Brown
2012-05-24 10:07 ` Mark Brown
2012-05-25 9:30 ` Tomoya MORINAGA
2012-05-25 9:30 ` Tomoya MORINAGA
2012-05-25 10:20 ` Vinod Koul
2012-05-25 10:20 ` [alsa-devel] " Vinod Koul
2012-05-27 22:19 ` Mark Brown
2012-05-27 22:19 ` [alsa-devel] " Mark Brown
2012-05-30 10:50 ` Tomoya MORINAGA
2012-05-30 10:50 ` [alsa-devel] " Tomoya MORINAGA
2012-05-30 12:14 ` Mark Brown
2012-05-31 5:38 ` Tomoya MORINAGA
2012-05-31 5:38 ` [alsa-devel] " Tomoya MORINAGA
2012-05-31 10:45 ` Mark Brown [this message]
2012-05-31 10:45 ` Mark Brown
2012-06-01 8:13 ` Tomoya MORINAGA
2012-06-01 8:13 ` [alsa-devel] " Tomoya MORINAGA
2012-06-01 8:30 ` Mark Brown
2012-06-01 8:30 ` [alsa-devel] " Mark Brown
2012-06-11 7:05 ` Tomoya MORINAGA
2012-06-11 7:05 ` [alsa-devel] " Tomoya MORINAGA
2012-06-11 8:54 ` Mark Brown
2012-06-11 8:54 ` [alsa-devel] " Mark Brown
2012-06-13 10:41 ` Tomoya MORINAGA
2012-06-13 10:41 ` [alsa-devel] " Tomoya MORINAGA
2012-06-13 12:11 ` Mark Brown
2012-06-13 12:11 ` [alsa-devel] " Mark Brown
2012-05-28 5:35 ` Tomoya MORINAGA
2012-05-28 5:35 ` [alsa-devel] " Tomoya MORINAGA
2012-02-23 5:46 ` [PATCH v5] sound/soc/lapis: add machine driver for ML7213 Carrier Board Tomoya MORINAGA
2012-02-23 5:46 ` Tomoya MORINAGA
2012-03-02 13:05 ` Mark Brown
2012-03-02 13:05 ` Mark Brown
2012-03-06 5:49 ` Tomoya MORINAGA
2012-03-06 11:54 ` Mark Brown
2012-03-06 11:54 ` Mark Brown
2012-03-07 1:57 ` Tomoya MORINAGA
2012-03-07 1:57 ` Tomoya MORINAGA
2012-03-09 6:38 ` [PATCH v6] " Tomoya MORINAGA
2012-03-09 6:38 ` Tomoya MORINAGA
2012-03-14 14:45 ` Mark Brown
2012-03-14 14:45 ` Mark Brown
2012-03-15 4:50 ` Tomoya MORINAGA
2012-03-15 10:50 ` Mark Brown
2012-03-15 10:50 ` Mark Brown
2012-03-16 4:07 ` Tomoya MORINAGA
2012-03-16 4:07 ` Tomoya MORINAGA
2012-03-16 19:06 ` Mark Brown
2012-03-16 19:06 ` Mark Brown
2012-03-18 23:45 ` Tomoya MORINAGA
2012-03-18 23:45 ` Tomoya MORINAGA
2012-03-19 12:02 ` [PATCH v7] " Tomoya MORINAGA
2012-03-19 19:21 ` Mark Brown
2012-03-19 19:21 ` Mark Brown
2012-03-21 0:51 ` Tomoya MORINAGA
2012-03-21 0:51 ` Tomoya MORINAGA
2012-02-29 23:51 ` [PATCH v6] sound/soc/codecs: add LAPIS Semiconductor ML26124 Mark Brown
2012-02-29 23:51 ` Mark Brown
2012-03-02 8:16 ` Tomoya MORINAGA
2012-03-02 12:58 ` Mark Brown
2012-03-06 3:03 ` Tomoya MORINAGA
2012-03-06 10:00 ` Mark Brown
2012-03-06 10:49 ` Tomoya MORINAGA
2012-03-06 12:12 ` Mark Brown
2012-03-06 12:12 ` Mark Brown
2012-03-07 2:16 ` Tomoya MORINAGA
2012-03-07 2:16 ` Tomoya MORINAGA
2012-03-07 11:48 ` Mark Brown
2012-03-08 2:24 ` Tomoya MORINAGA
2012-03-08 2:24 ` Tomoya MORINAGA
2012-03-08 11:47 ` Mark Brown
2012-03-08 11:47 ` Mark Brown
2012-03-09 6:37 ` [PATCH v7] " Tomoya MORINAGA
2012-03-09 6:37 ` Tomoya MORINAGA
2012-03-14 14:39 ` Mark Brown
2012-03-14 14:39 ` Mark Brown
2012-03-15 4:51 ` Tomoya MORINAGA
2012-03-15 4:51 ` [alsa-devel] " Tomoya MORINAGA
2012-03-14 17:40 ` [alsa-devel] [PATCH v6] " Lars-Peter Clausen
2012-03-14 17:45 ` Mark Brown
2012-03-14 17:45 ` [alsa-devel] " Mark Brown
2012-03-15 6:29 ` Tomoya MORINAGA
2012-03-15 6:29 ` [alsa-devel] " Tomoya MORINAGA
2012-03-16 9:55 ` Tomoya MORINAGA
2012-03-16 9:55 ` [alsa-devel] " Tomoya MORINAGA
2012-03-17 21:52 ` Mark Brown
2012-03-19 11:59 ` [PATCH v8] " Tomoya MORINAGA
2012-03-19 19:07 ` Mark Brown
2012-03-19 19:07 ` Mark Brown
2012-03-21 0:57 ` Tomoya MORINAGA
2012-03-21 0:57 ` Tomoya MORINAGA
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