From: Jean-Francois Moine <moinejf@free.fr>
To: Andrew Lunn <andrew@lunn.ch>
Cc: devicetree@vger.kernel.org, alsa-devel@alsa-project.org,
Russell King - ARM Linux <linux@arm.linux.org.uk>,
lgirdwood@gmail.com, dri-devel@lists.freedesktop.org,
linux-kernel@vger.kernel.org, Mark Brown <broonie@kernel.org>,
linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH] ASoC: tda998x: add a codec to the HDMI transmitter
Date: Wed, 2 Jul 2014 19:51:54 +0200 [thread overview]
Message-ID: <20140702195154.47d6f6b4@armhf> (raw)
In-Reply-To: <20140702165628.GO20799@lunn.ch>
On Wed, 2 Jul 2014 18:56:28 +0200
Andrew Lunn <andrew@lunn.ch> wrote:
> How well will this work with Russell concept of a front end and two
> backends? Can you uses your CODEC twice, once with the I2S backend and
> a second time with the S/PDIF backend?
Hi Andrew,
The TDA998x CODEC has two functions:
- it sets the possible formats and rates when the screen connects and
- it sets the audio input port when audio streaming starts.
I tested this CODEC with both DAPM and DPCM. If the audio subsystem
asks for streaming on both I2S and S/PDIF, only the last call is served
(this depends on the order of the DAI links in the audio card creation
table).
As I told to Russell, DPCM just asks for a 'system' DAI (front-end),
but it also asks for some additional code in the kirkwood DMA driver
because all PCMs are activated on streaming start.
--
Ken ar c'hentañ | ** Breizh ha Linux atav! **
Jef | http://moinejf.free.fr/
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WARNING: multiple messages have this Message-ID (diff)
From: moinejf@free.fr (Jean-Francois Moine)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH] ASoC: tda998x: add a codec to the HDMI transmitter
Date: Wed, 2 Jul 2014 19:51:54 +0200 [thread overview]
Message-ID: <20140702195154.47d6f6b4@armhf> (raw)
In-Reply-To: <20140702165628.GO20799@lunn.ch>
On Wed, 2 Jul 2014 18:56:28 +0200
Andrew Lunn <andrew@lunn.ch> wrote:
> How well will this work with Russell concept of a front end and two
> backends? Can you uses your CODEC twice, once with the I2S backend and
> a second time with the S/PDIF backend?
Hi Andrew,
The TDA998x CODEC has two functions:
- it sets the possible formats and rates when the screen connects and
- it sets the audio input port when audio streaming starts.
I tested this CODEC with both DAPM and DPCM. If the audio subsystem
asks for streaming on both I2S and S/PDIF, only the last call is served
(this depends on the order of the DAI links in the audio card creation
table).
As I told to Russell, DPCM just asks for a 'system' DAI (front-end),
but it also asks for some additional code in the kirkwood DMA driver
because all PCMs are activated on streaming start.
--
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: Andrew Lunn <andrew@lunn.ch>
Cc: Mark Brown <broonie@kernel.org>,
Russell King - ARM Linux <linux@arm.linux.org.uk>,
devicetree@vger.kernel.org, alsa-devel@alsa-project.org,
lgirdwood@gmail.com, dri-devel@lists.freedesktop.org,
linux-kernel@vger.kernel.org, Rob Clark <robdclark@gmail.com>,
Dave Airlie <airlied@gmail.com>,
linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH] ASoC: tda998x: add a codec to the HDMI transmitter
Date: Wed, 2 Jul 2014 19:51:54 +0200 [thread overview]
Message-ID: <20140702195154.47d6f6b4@armhf> (raw)
In-Reply-To: <20140702165628.GO20799@lunn.ch>
On Wed, 2 Jul 2014 18:56:28 +0200
Andrew Lunn <andrew@lunn.ch> wrote:
> How well will this work with Russell concept of a front end and two
> backends? Can you uses your CODEC twice, once with the I2S backend and
> a second time with the S/PDIF backend?
Hi Andrew,
The TDA998x CODEC has two functions:
- it sets the possible formats and rates when the screen connects and
- it sets the audio input port when audio streaming starts.
I tested this CODEC with both DAPM and DPCM. If the audio subsystem
asks for streaming on both I2S and S/PDIF, only the last call is served
(this depends on the order of the DAI links in the audio card creation
table).
As I told to Russell, DPCM just asks for a 'system' DAI (front-end),
but it also asks for some additional code in the kirkwood DMA driver
because all PCMs are activated on streaming start.
--
Ken ar c'hentañ | ** Breizh ha Linux atav! **
Jef | http://moinejf.free.fr/
next prev parent reply other threads:[~2014-07-02 17:51 UTC|newest]
Thread overview: 42+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-07-02 16:38 [PATCH] ASoC: tda998x: add a codec to the HDMI transmitter Jean-Francois Moine
2014-07-02 16:38 ` Jean-Francois Moine
2014-07-02 16:38 ` Jean-Francois Moine
2014-07-02 16:56 ` Andrew Lunn
2014-07-02 16:56 ` Andrew Lunn
2014-07-02 17:51 ` Jean-Francois Moine [this message]
2014-07-02 17:51 ` Jean-Francois Moine
2014-07-02 17:51 ` Jean-Francois Moine
2014-07-02 18:02 ` Russell King - ARM Linux
2014-07-02 18:02 ` Russell King - ARM Linux
2014-07-02 18:02 ` Russell King - ARM Linux
2014-07-02 19:37 ` Mark Brown
2014-07-02 19:37 ` Mark Brown
2014-07-02 19:42 ` Mark Brown
2014-07-02 19:42 ` Mark Brown
2014-07-03 5:49 ` Jean-Francois Moine
2014-07-03 5:49 ` Jean-Francois Moine
2014-07-03 5:49 ` Jean-Francois Moine
2014-07-03 10:44 ` Mark Brown
2014-07-03 10:44 ` Mark Brown
2014-07-03 10:44 ` Mark Brown
2014-07-03 11:34 ` Jean-Francois Moine
2014-07-03 11:34 ` Jean-Francois Moine
2014-07-03 11:34 ` Jean-Francois Moine
2014-07-03 11:59 ` Mark Brown
2014-07-03 11:59 ` Mark Brown
2014-07-03 11:59 ` Mark Brown
2014-07-03 13:28 ` Jean-Francois Moine
2014-07-03 13:28 ` Jean-Francois Moine
2014-07-03 13:28 ` Jean-Francois Moine
2014-07-03 13:43 ` Russell King - ARM Linux
2014-07-03 13:43 ` Russell King - ARM Linux
2014-07-03 13:43 ` Russell King - ARM Linux
[not found] ` <20140703134346.GW32514-l+eeeJia6m9vn6HldHNs0ANdhmdF6hFW@public.gmane.org>
2014-07-03 15:29 ` Jean-Francois Moine
2014-07-03 15:29 ` Jean-Francois Moine
2014-07-03 15:29 ` Jean-Francois Moine
2014-07-03 15:43 ` Russell King - ARM Linux
2014-07-03 15:43 ` Russell King - ARM Linux
2014-07-03 15:43 ` Russell King - ARM Linux
2014-07-03 16:26 ` Jean-Francois Moine
2014-07-03 16:26 ` Jean-Francois Moine
2014-07-03 16:26 ` Jean-Francois Moine
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