From: Timur Tabi <timur@freescale.com>
To: Mark Brown <broonie@opensource.wolfsonmicro.com>
Cc: alsa-devel@alsa-project.org,
Benjamin Herrenschmidt <benh@kernel.crashing.org>,
kumar.gala@freescale.com,
Grant Likely <grant.likely@secretlab.ca>,
linuxppc-dev@ozlabs.org, Liam Girdwood <lrg@slimlogic.co.uk>
Subject: Re: [PATCH 1/2] powerpc: add platform registration for ALSA SoC drivers
Date: Tue, 27 Apr 2010 16:03:27 -0500 [thread overview]
Message-ID: <4BD7511F.7090201@freescale.com> (raw)
In-Reply-To: <20100427205924.GC15083@opensource.wolfsonmicro.com>
Mark Brown wrote:
> It's entirely possible that if the board designer intended the verious
> SSIs to be used in concert they've done something like cross wire the
> clocks which creates a board-specific interrelationship that needs to be
> dealt with.
Fine, but I don't see how that can be handled with the current code. Each SSI is independent, and audio is streamed to it via DMA. The current SSI driver would need to be completely rewritten in order to initiate both DMA operations simultaneously. The clocking is the least of my problems.
--
Timur Tabi
Linux kernel developer at Freescale
WARNING: multiple messages have this Message-ID (diff)
From: Timur Tabi <timur@freescale.com>
To: Mark Brown <broonie@opensource.wolfsonmicro.com>
Cc: alsa-devel@alsa-project.org, kumar.gala@freescale.com,
linuxppc-dev@ozlabs.org, Liam Girdwood <lrg@slimlogic.co.uk>
Subject: Re: [alsa-devel] [PATCH 1/2] powerpc: add platform registration for ALSA SoC drivers
Date: Tue, 27 Apr 2010 16:03:27 -0500 [thread overview]
Message-ID: <4BD7511F.7090201@freescale.com> (raw)
In-Reply-To: <20100427205924.GC15083@opensource.wolfsonmicro.com>
Mark Brown wrote:
> It's entirely possible that if the board designer intended the verious
> SSIs to be used in concert they've done something like cross wire the
> clocks which creates a board-specific interrelationship that needs to be
> dealt with.
Fine, but I don't see how that can be handled with the current code. Each SSI is independent, and audio is streamed to it via DMA. The current SSI driver would need to be completely rewritten in order to initiate both DMA operations simultaneously. The clocking is the least of my problems.
--
Timur Tabi
Linux kernel developer at Freescale
next prev parent reply other threads:[~2010-04-27 21:03 UTC|newest]
Thread overview: 108+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-04-26 20:49 [PATCH 1/2] powerpc: add platform registration for ALSA SoC drivers Timur Tabi
2010-04-27 6:36 ` Benjamin Herrenschmidt
2010-04-27 6:36 ` Benjamin Herrenschmidt
2010-04-27 8:07 ` Liam Girdwood
2010-04-27 8:07 ` [alsa-devel] " Liam Girdwood
2010-04-27 14:52 ` Timur Tabi
2010-04-27 14:52 ` [alsa-devel] " Timur Tabi
2010-04-27 15:20 ` Liam Girdwood
2010-04-27 15:20 ` [alsa-devel] " Liam Girdwood
2010-04-27 15:28 ` Timur Tabi
2010-04-27 15:28 ` [alsa-devel] " Timur Tabi
2010-04-27 15:56 ` Timur Tabi
2010-04-27 15:56 ` [alsa-devel] " Timur Tabi
2010-04-27 16:41 ` Liam Girdwood
2010-04-27 16:41 ` [alsa-devel] " Liam Girdwood
2010-04-27 18:32 ` Timur Tabi
2010-04-27 18:32 ` [alsa-devel] " Timur Tabi
2010-04-27 19:15 ` Grant Likely
2010-04-27 19:15 ` [alsa-devel] " Grant Likely
2010-04-27 20:04 ` Timur Tabi
2010-04-27 20:04 ` [alsa-devel] " Timur Tabi
2010-04-27 20:38 ` Mark Brown
2010-04-27 20:38 ` [alsa-devel] " Mark Brown
2010-04-28 4:19 ` Benjamin Herrenschmidt
2010-04-28 4:19 ` [alsa-devel] " Benjamin Herrenschmidt
2010-04-28 4:18 ` Benjamin Herrenschmidt
2010-04-28 4:18 ` [alsa-devel] " Benjamin Herrenschmidt
2010-04-30 21:46 ` Timur Tabi
2010-04-30 21:46 ` [alsa-devel] " Timur Tabi
2010-04-30 22:04 ` Timur Tabi
2010-04-30 22:04 ` [alsa-devel] " Timur Tabi
2010-04-27 20:24 ` Grant Likely
2010-04-27 20:24 ` [alsa-devel] " Grant Likely
2010-04-27 20:46 ` Timur Tabi
2010-04-27 20:46 ` [alsa-devel] " Timur Tabi
2010-04-27 20:59 ` Mark Brown
2010-04-27 20:59 ` [alsa-devel] " Mark Brown
2010-04-27 21:03 ` Timur Tabi [this message]
2010-04-27 21:03 ` Timur Tabi
2010-04-27 21:11 ` Mark Brown
2010-04-27 21:11 ` [alsa-devel] " Mark Brown
2010-04-28 4:25 ` Benjamin Herrenschmidt
2010-04-28 4:25 ` [alsa-devel] " Benjamin Herrenschmidt
2010-04-28 13:00 ` Mark Brown
2010-04-28 13:00 ` [alsa-devel] " Mark Brown
2010-04-29 0:42 ` Benjamin Herrenschmidt
2010-04-29 0:42 ` [alsa-devel] " Benjamin Herrenschmidt
2010-04-28 5:37 ` Grant Likely
2010-04-28 5:37 ` [alsa-devel] " Grant Likely
2010-04-28 13:35 ` Timur Tabi
2010-04-28 13:35 ` [alsa-devel] " Timur Tabi
2010-04-28 13:57 ` Grant Likely
2010-04-28 13:57 ` [alsa-devel] " Grant Likely
2010-04-28 16:20 ` Timur Tabi
2010-04-28 16:20 ` [alsa-devel] " Timur Tabi
2010-04-28 16:47 ` Grant Likely
2010-04-28 16:47 ` [alsa-devel] " Grant Likely
2010-04-28 17:27 ` Timur Tabi
2010-04-28 17:27 ` [alsa-devel] " Timur Tabi
2010-04-27 22:29 ` Mark Brown
2010-04-27 22:29 ` [alsa-devel] " Mark Brown
2010-04-28 2:31 ` Grant Likely
2010-04-28 2:31 ` [alsa-devel] " Grant Likely
2010-04-28 9:16 ` Mark Brown
2010-04-28 9:16 ` [alsa-devel] " Mark Brown
2010-04-28 4:10 ` Benjamin Herrenschmidt
2010-04-28 4:10 ` [alsa-devel] " Benjamin Herrenschmidt
2010-04-28 12:07 ` Mark Brown
2010-04-28 12:07 ` [alsa-devel] " Mark Brown
2010-04-29 0:36 ` Benjamin Herrenschmidt
2010-04-29 0:36 ` [alsa-devel] " Benjamin Herrenschmidt
2010-04-29 3:43 ` Grant Likely
2010-04-29 3:43 ` [alsa-devel] " Grant Likely
2010-04-28 13:19 ` Timur Tabi
2010-04-28 13:19 ` [alsa-devel] " Timur Tabi
2010-04-28 13:39 ` Mark Brown
2010-04-28 13:39 ` [alsa-devel] " Mark Brown
2010-04-27 9:54 ` Mark Brown
2010-04-27 9:54 ` Mark Brown
2010-04-27 10:09 ` Benjamin Herrenschmidt
2010-04-27 10:09 ` Benjamin Herrenschmidt
2010-04-27 10:41 ` Mark Brown
2010-04-27 10:41 ` Mark Brown
2010-04-27 20:27 ` Grant Likely
2010-04-27 20:27 ` Grant Likely
2010-04-27 20:50 ` Mark Brown
2010-04-27 20:50 ` Mark Brown
2010-04-27 20:53 ` Timur Tabi
2010-04-27 20:53 ` Timur Tabi
2010-04-28 12:49 ` Liam Girdwood
2010-04-28 12:49 ` [alsa-devel] " Liam Girdwood
2010-04-28 20:35 ` Timur Tabi
2010-04-28 20:35 ` [alsa-devel] " Timur Tabi
2010-04-28 21:58 ` Grant Likely
2010-04-28 21:58 ` [alsa-devel] " Grant Likely
2010-04-28 22:13 ` Timur Tabi
2010-04-28 22:13 ` [alsa-devel] " Timur Tabi
[not found] ` <r2oed82fe3e1004281513k23b54b56v7904a4a34750c90b-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2010-04-28 22:23 ` Grant Likely
2010-04-28 22:23 ` Grant Likely
2010-04-29 0:52 ` Benjamin Herrenschmidt
2010-04-29 0:52 ` Benjamin Herrenschmidt
2010-04-29 3:44 ` Grant Likely
2010-04-29 3:44 ` [alsa-devel] " Grant Likely
2010-04-29 0:50 ` Benjamin Herrenschmidt
2010-04-29 0:50 ` [alsa-devel] " Benjamin Herrenschmidt
2010-04-27 19:21 ` Grant Likely
2010-04-27 19:21 ` Grant Likely
2010-04-27 20:05 ` Timur Tabi
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