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From: moinejf@free.fr (Jean-Francois Moine)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH 2/2] ARM: Dove: Add the audio device to the Cubox DT
Date: Sat, 31 Aug 2013 13:55:19 +0200	[thread overview]
Message-ID: <20130831135519.6ab0e163@armhf> (raw)
In-Reply-To: <20130831112430.GD6617@n2100.arm.linux.org.uk>

On Sat, 31 Aug 2013 12:24:31 +0100
Russell King - ARM Linux <linux@arm.linux.org.uk> wrote:

> > According to the Dove specification, the audio controller works with
> > the samples rates 44.1, 48 and 96 kHz, so, I don't see the usage of the
> > external clock, except when using the two audio controllers with
> > different sample rates.
	[snip]
> > But, BTW, as the kirkwood-i2 driver is written, this last case does not
> > work: for 44.1, 48 and 96 kHz, the external clock is never used and
> > there is only one DCO.  
> 
> This doesn't make sense.  "this last case" - what "case" are you referring
> to?  "there is only one DCO" ?  Yes, there is only one DCO, what is its
> relevance to the statement you're making?  And yes, in mainline we
> currently use the DCO for the standard 44.1, 48 and 96kHz sample rates.
> That's fine.  Confused.

Sorry, it was clear in my head :)

The last case was "when using the two audio controllers with different
sample rates" (I should have added "in the set [44.1, 48, 96 kHz]").
Then, with or without the availability of external clocks, both
controllers will set the unique DCO to two different rates.

-- 
Ken ar c'henta?	|	      ** Breizh ha Linux atav! **
Jef		|		http://moinejf.free.fr/

WARNING: multiple messages have this Message-ID (diff)
From: Jean-Francois Moine <moinejf@free.fr>
To: Russell King - ARM Linux <linux@arm.linux.org.uk>
Cc: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>,
	linux-arm-kernel@lists.infradead.org,
	Jason Cooper <jason@lakedaemon.net>,
	Rob Herring <rob.herring@calxeda.com>,
	Pawel Moll <pawel.moll@arm.com>,
	Mark Rutland <mark.rutland@arm.com>,
	Stephen Warren <swarren@wwwdotorg.org>,
	Ian Campbell <ian.campbell@citrix.com>,
	devicetree@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH 2/2] ARM: Dove: Add the audio device to the Cubox DT
Date: Sat, 31 Aug 2013 13:55:19 +0200	[thread overview]
Message-ID: <20130831135519.6ab0e163@armhf> (raw)
In-Reply-To: <20130831112430.GD6617@n2100.arm.linux.org.uk>

On Sat, 31 Aug 2013 12:24:31 +0100
Russell King - ARM Linux <linux@arm.linux.org.uk> wrote:

> > According to the Dove specification, the audio controller works with
> > the samples rates 44.1, 48 and 96 kHz, so, I don't see the usage of the
> > external clock, except when using the two audio controllers with
> > different sample rates.
	[snip]
> > But, BTW, as the kirkwood-i2 driver is written, this last case does not
> > work: for 44.1, 48 and 96 kHz, the external clock is never used and
> > there is only one DCO.  
> 
> This doesn't make sense.  "this last case" - what "case" are you referring
> to?  "there is only one DCO" ?  Yes, there is only one DCO, what is its
> relevance to the statement you're making?  And yes, in mainline we
> currently use the DCO for the standard 44.1, 48 and 96kHz sample rates.
> That's fine.  Confused.

Sorry, it was clear in my head :)

The last case was "when using the two audio controllers with different
sample rates" (I should have added "in the set [44.1, 48, 96 kHz]").
Then, with or without the availability of external clocks, both
controllers will set the unique DCO to two different rates.

-- 
Ken ar c'hentañ	|	      ** Breizh ha Linux atav! **
Jef		|		http://moinejf.free.fr/

  reply	other threads:[~2013-08-31 11:55 UTC|newest]

Thread overview: 46+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2013-08-28  9:35 [PATCH 2/2] ARM: Dove: Add the audio device to the Cubox DT Jean-Francois Moine
2013-08-28  9:35 ` Jean-Francois Moine
2013-08-28 10:14 ` Sebastian Hesselbarth
2013-08-28 10:14   ` Sebastian Hesselbarth
2013-08-31 10:51   ` Jean-Francois Moine
2013-08-31 10:51     ` Jean-Francois Moine
2013-08-31 11:24     ` Russell King - ARM Linux
2013-08-31 11:24       ` Russell King - ARM Linux
2013-08-31 11:24       ` Russell King - ARM Linux
2013-08-31 11:55       ` Jean-Francois Moine [this message]
2013-08-31 11:55         ` Jean-Francois Moine
2013-08-31 12:17         ` Russell King - ARM Linux
2013-08-31 12:17           ` Russell King - ARM Linux
2013-08-31 12:17           ` Russell King - ARM Linux
2013-09-01  7:04       ` Jean-Francois Moine
2013-09-01  7:04         ` Jean-Francois Moine
2013-09-01  9:26     ` Sebastian Hesselbarth
2013-09-01  9:26       ` Sebastian Hesselbarth
2013-09-01  9:26       ` Sebastian Hesselbarth
2013-09-01 11:23       ` Jean-Francois Moine
2013-09-26  8:11       ` Jean-Francois Moine
2013-09-26  8:11         ` Jean-Francois Moine
2013-09-26  8:11         ` Jean-Francois Moine
2013-09-26  8:31         ` Sebastian Hesselbarth
2013-09-26  8:31           ` Sebastian Hesselbarth
2013-09-26 11:28           ` Jean-Francois Moine
2013-09-26 11:28             ` Jean-Francois Moine
2013-09-26 11:28             ` Jean-Francois Moine
2013-09-26 12:42             ` Sebastian Hesselbarth
2013-09-26 12:42               ` Sebastian Hesselbarth
2013-09-26 12:42               ` Sebastian Hesselbarth
2013-09-28 14:27             ` Sebastian Hesselbarth
2013-09-28 14:27               ` Sebastian Hesselbarth
2013-09-28 14:27               ` Sebastian Hesselbarth
2013-10-03 16:17               ` Jean-Francois Moine
2013-10-03 16:17                 ` Jean-Francois Moine
2013-10-03 16:17                 ` Jean-Francois Moine
2013-10-08 16:11                 ` Jason Cooper
2013-10-08 16:11                   ` Jason Cooper
2013-10-08 16:11                   ` Jason Cooper
2013-10-08 17:59                   ` Jean-Francois Moine
2013-10-08 17:59                     ` Jean-Francois Moine
2013-10-08 17:59                     ` Jean-Francois Moine
2013-10-08 18:00                     ` Jason Cooper
2013-10-08 18:00                       ` Jason Cooper
2013-10-08 18:00                       ` Jason Cooper

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