From: Mark Brown <broonie@opensource.wolfsonmicro.com>
To: Stephen Warren <swarren@nvidia.com>
Cc: "linux-tegra@vger.kernel.org" <linux-tegra@vger.kernel.org>,
"dp@opensource.wolfsonmicro.com" <dp@opensource.wolfsonmicro.com>,
"alsa-devel@alsa-project.org" <alsa-devel@alsa-project.org>
Subject: Re: [PATCH 10/11] ASoC: tegra: Harmony machine support
Date: Tue, 4 Jan 2011 15:30:20 +0000 [thread overview]
Message-ID: <20110104153020.GE24774@opensource.wolfsonmicro.com> (raw)
In-Reply-To: <74CDBE0F657A3D45AFBB94109FB122FF030FD79220@HQMAIL01.nvidia.com>
On Mon, Jan 03, 2011 at 11:39:32AM -0800, Stephen Warren wrote:
> Mark Brown wrote:
> > It might be interesting to try having the CODEC master the I2S bus - it
> > might not change anything, but it sometimes shows up if one of the clock
> > lines is misconfigured.
> Having the codec be master of the bit and frame clocks appears to completely
> solve the noise issues. I do notice that different sample rates play the same
> audio at different pitches though, so something is still wrong, but it's most
> likely to be incorrect codec MCLK input right now; I'll keep investigating...
That's progress; with the CODEC as master all the clocks within the
CODEC will be configured correctly in relation to one another which will
help with the noise - probably the MCLK rate does have issues like you
say, with the CODEC as master pitch variations are a likely symptom.
prev parent reply other threads:[~2011-01-04 15:31 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <1292622090-21896-1-git-send-email-swarren@nvidia.com>
[not found] ` <1292622090-21896-8-git-send-email-swarren@nvidia.com>
[not found] ` <20101217220029.GD25609@sirena.org.uk>
2010-12-22 18:30 ` [PATCH 07/11] ASoC: tegra: Add tegra-das driver Stephen Warren
2010-12-22 20:11 ` Mark Brown
2011-01-05 22:58 ` Stephen Warren
2011-01-05 23:18 ` Mark Brown
2011-01-05 23:27 ` Stephen Warren
2011-01-05 23:33 ` Mark Brown
2011-01-06 0:20 ` Stephen Warren
2011-01-06 0:59 ` Mark Brown
2011-01-06 17:46 ` Stephen Warren
2011-01-06 21:02 ` Mark Brown
2011-01-06 21:58 ` Stephen Warren
2011-01-06 22:13 ` Mark Brown
[not found] ` <1292622090-21896-9-git-send-email-swarren@nvidia.com>
[not found] ` <20101217220658.GG25609@sirena.org.uk>
2010-12-22 19:03 ` [PATCH 08/11] ASoC: tegra: Add tegra-pcm driver Stephen Warren
2010-12-22 20:16 ` Mark Brown
[not found] ` <1292622090-21896-11-git-send-email-swarren@nvidia.com>
[not found] ` <20101217222636.GJ25609@sirena.org.uk>
[not found] ` <74CDBE0F657A3D45AFBB94109FB122FF030FD7885D@HQMAIL01.nvidia.com>
[not found] ` <20101217230618.GA28364@sirena.org.uk>
[not found] ` <20101220211131.GG14986@sirena.org.uk>
2010-12-23 1:13 ` [PATCH 10/11] ASoC: tegra: Harmony machine support Stephen Warren
2010-12-23 2:19 ` Mark Brown
2011-01-03 19:39 ` Stephen Warren
2011-01-04 15:30 ` Mark Brown [this message]
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