From: Mark Brown <broonie@opensource.wolfsonmicro.com>
To: Jassi Brar <jassisinghbrar@gmail.com>
Cc: Seungwhan Youn <sw.youn@samsung.com>,
alsa-devel@alsa-project.org, Liam Girdwood <lrg@slimlogic.co.uk>,
Seungwhan Youn <claude.youn@gmail.com>
Subject: Re: [PATCH 4/7] ASoC: Automatically calculate clock ratio for WM8580
Date: Mon, 16 Aug 2010 16:19:58 +0100 [thread overview]
Message-ID: <20100816151958.GE3276@rakim.wolfsonmicro.main> (raw)
In-Reply-To: <AANLkTinTYo6_BBSkhTt8Km-MR4wwexDS3orFJdNSiufT@mail.gmail.com>
On Mon, Aug 16, 2010 at 09:51:35PM +0900, Jassi Brar wrote:
> When CPU MASTER was default, people asked for SLAVE. But nobody asked
> for MASTER since we selected SLAVE by default. Both work equally well, it just
> saves our efforts.
What were people actually complaining about? I suspect it was the root
clock for the audio tree that they were concerned about rather than the
I2S bus clock.
> Btw, I thought CODEC usually provide more accurate signals and hence CPU SLAVE
> is better. Is is too wrong?
Well, the main issue is the quality of the root clock for the tree which
I'd not propose to change away from the CODEC. In terms of just passing
through a well generated clock at a useful rate it's fairly rare to have
problems, the problem is getting that 256fs (or whatever) root clock.
next prev parent reply other threads:[~2010-08-16 15:19 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-08-13 19:33 [PATCH 0/7] WM8580 updates Mark Brown
2010-08-13 19:35 ` [PATCH 1/7] ASoC: Add a bit of resource unwinding in the S3C IISv4 driver Mark Brown
2010-08-13 19:35 ` [PATCH 2/7] ASoC: Convert WM8580 hw_params to use snd_soc_update_bits() Mark Brown
2010-08-13 19:35 ` [PATCH 3/7] ASoC: Remove unused rate selection bitmasks from WM8580 Mark Brown
2010-08-13 19:35 ` [PATCH 4/7] ASoC: Automatically calculate clock ratio for WM8580 Mark Brown
2010-08-15 9:00 ` Seungwhan Youn
2010-08-15 11:09 ` Mark Brown
2010-08-16 4:36 ` Jassi Brar
2010-08-16 10:20 ` Mark Brown
2010-08-16 12:51 ` Jassi Brar
2010-08-16 15:19 ` Mark Brown [this message]
2010-08-16 23:14 ` Jassi Brar
2010-08-17 9:46 ` Mark Brown
2010-08-31 6:46 ` Jassi Brar
2010-08-31 10:42 ` Mark Brown
2010-08-16 4:16 ` Seungwhan Youn
2010-08-16 12:21 ` Mark Brown
2010-08-16 12:47 ` Jassi Brar
2010-08-13 19:35 ` [PATCH 5/7] ASoC: Implement BCLK rate selection " Mark Brown
2010-08-13 19:35 ` [PATCH 6/7] ASoC: Fix inverted WM8580 capture mute control Mark Brown
2010-08-15 4:50 ` Seungwhan Youn
2010-08-15 6:20 ` Seungwhan Youn
2010-08-13 19:35 ` [PATCH 7/7] ASoC: Automatically manage WM8580 DAC OSR Mark Brown
2010-08-14 4:09 ` [PATCH 0/7] WM8580 updates Jassi Brar
2010-08-15 9:21 ` Seungwhan Youn
2010-08-15 11:10 ` Mark Brown
2010-08-16 9:44 ` Seungwhan Youn
2010-08-16 14:49 ` Mark Brown
2010-08-19 11:37 ` Seungwhan Youn
2010-08-14 10:45 ` Liam Girdwood
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