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From: Mark Brown <broonie-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
To: Olivier MOYSAN <olivier.moysan-qxv4g6HH51o@public.gmane.org>
Cc: Rob Herring <robh-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>,
	"lgirdwood-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org"
	<lgirdwood-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>,
	"perex-/Fr2/VpizcU@public.gmane.org"
	<perex-/Fr2/VpizcU@public.gmane.org>,
	"tiwai-IBi9RG/b67k@public.gmane.org"
	<tiwai-IBi9RG/b67k@public.gmane.org>,
	"mcoquelin.stm32-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org"
	<mcoquelin.stm32-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>,
	Alexandre TORGUE <alexandre.torgue-qxv4g6HH51o@public.gmane.org>,
	"alsa-devel-K7yf7f+aM1XWsZ/bQMPhNw@public.gmane.org"
	<alsa-devel-K7yf7f+aM1XWsZ/bQMPhNw@public.gmane.org>,
	"mark.rutland-5wv7dgnIgG8@public.gmane.org"
	<mark.rutland-5wv7dgnIgG8@public.gmane.org>,
	"devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org"
	<devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
	"linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org"
	<linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org>,
	Arnaud POULIQUEN <arnaud.pouliquen-qxv4g6HH51o@public.gmane.org>,
	Benjamin GAIGNARD
	<benjamin.gaignard-qxv4g6HH51o@public.gmane.org>
Subject: Re: [PATCH 1/2] dt-bindings: Document STM32 I2S bindings
Date: Wed, 12 Apr 2017 12:32:51 +0100	[thread overview]
Message-ID: <20170412113251.nfyk5sw6c5pnpmwr@sirena.org.uk> (raw)
In-Reply-To: <86a179ad-7961-18f7-8050-25e0e584c77d-qxv4g6HH51o@public.gmane.org>

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On Wed, Apr 12, 2017 at 08:30:31AM +0000, Olivier MOYSAN wrote:
> On 04/11/2017 11:10 PM, Mark Brown wrote:

> > That sounds wrong, I'd expect this wiring to be done statically as part
> > of the .dtsi for the SoC (or just grabbed as needed at runtime if
> > things are flexbile enough) rather than being a configuration thing done
> > per board...  I had thought that this was configuration reflecting
> > different ways of taping out the IP with different feature sets, is that
> > not the case?

> This configuration is board dependent. The IP may be used as rx, tx or 
> fd depending on board. So I think it can make sense to have a DMA 
> configuration linked to board, and to set IP mode accordingly.

It is totally normal to just not use one direction in a given system, we
don't normally need to do anything special to handle things.  I'm a bit
confused as to what's different here and needs configuring?

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WARNING: multiple messages have this Message-ID (diff)
From: broonie@kernel.org (Mark Brown)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH 1/2] dt-bindings: Document STM32 I2S bindings
Date: Wed, 12 Apr 2017 12:32:51 +0100	[thread overview]
Message-ID: <20170412113251.nfyk5sw6c5pnpmwr@sirena.org.uk> (raw)
In-Reply-To: <86a179ad-7961-18f7-8050-25e0e584c77d@st.com>

On Wed, Apr 12, 2017 at 08:30:31AM +0000, Olivier MOYSAN wrote:
> On 04/11/2017 11:10 PM, Mark Brown wrote:

> > That sounds wrong, I'd expect this wiring to be done statically as part
> > of the .dtsi for the SoC (or just grabbed as needed at runtime if
> > things are flexbile enough) rather than being a configuration thing done
> > per board...  I had thought that this was configuration reflecting
> > different ways of taping out the IP with different feature sets, is that
> > not the case?

> This configuration is board dependent. The IP may be used as rx, tx or 
> fd depending on board. So I think it can make sense to have a DMA 
> configuration linked to board, and to set IP mode accordingly.

It is totally normal to just not use one direction in a given system, we
don't normally need to do anything special to handle things.  I'm a bit
confused as to what's different here and needs configuring?
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  parent reply	other threads:[~2017-04-12 11:32 UTC|newest]

Thread overview: 32+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-04-06 15:40 [PATCH 0/2] ASoC: stm32: Add I2S driver olivier moysan
2017-04-06 15:40 ` olivier moysan
2017-04-06 15:40 ` [PATCH 1/2] dt-bindings: Document STM32 I2S bindings olivier moysan
2017-04-06 15:40   ` olivier moysan
2017-04-10 19:48   ` Rob Herring
2017-04-10 19:48     ` Rob Herring
2017-04-11 14:32     ` Mark Brown
2017-04-11 14:32       ` Mark Brown
2017-04-11 15:44       ` Olivier MOYSAN
2017-04-11 15:44         ` Olivier MOYSAN
2017-04-11 21:10         ` Mark Brown
2017-04-11 21:10           ` Mark Brown
2017-04-12  8:30           ` Olivier MOYSAN
2017-04-12  8:30             ` Olivier MOYSAN
     [not found]             ` <86a179ad-7961-18f7-8050-25e0e584c77d-qxv4g6HH51o@public.gmane.org>
2017-04-12 11:32               ` Mark Brown [this message]
2017-04-12 11:32                 ` Mark Brown
2017-04-12 12:58                 ` Olivier MOYSAN
2017-04-12 12:58                   ` Olivier MOYSAN
     [not found]                   ` <d886a9c7-ca46-f37a-0e82-6ed8d7a4e052-qxv4g6HH51o@public.gmane.org>
2017-04-12 15:38                     ` Mark Brown
2017-04-12 15:38                       ` Mark Brown
2017-04-13  8:01                       ` Olivier MOYSAN
2017-04-13  8:01                         ` Olivier MOYSAN
2017-04-26 16:15                         ` Mark Brown
2017-04-26 16:15                           ` Mark Brown
2017-04-27 15:57                           ` Olivier MOYSAN
2017-04-27 15:57                             ` Olivier MOYSAN
     [not found]       ` <20170411143250.3r7ys3rjshtxgaee-GFdadSzt00ze9xe1eoZjHA@public.gmane.org>
2017-04-11 16:02         ` Rob Herring
2017-04-11 16:02           ` Rob Herring
2017-04-11 20:19           ` Mark Brown
2017-04-11 20:19             ` Mark Brown
     [not found] ` <1491493236-2574-1-git-send-email-olivier.moysan-qxv4g6HH51o@public.gmane.org>
2017-04-06 15:40   ` [PATCH 2/2] ASoC: stm32: Add I2S driver olivier moysan
2017-04-06 15:40     ` olivier moysan

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