From mboxrd@z Thu Jan  1 00:00:00 1970
From: Jyri Sarha <jsarha@ti.com>
Subject: Re: [PATCH v9 1/4] drm/i2c: tda998x: Add DT support
	for audio
Date: Tue, 13 Jan 2015 21:41:01 +0200
Message-ID: <54B574CD.9020905@ti.com>
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To: Russell King - ARM Linux <linux@arm.linux.org.uk>, Jean-Francois Moine <moinejf@free.fr>
Cc: "devicetree@vger.kernel.org" <devicetree@vger.kernel.org>, "alsa-devel@alsa-project.org" <alsa-devel@alsa-project.org>, Andrew Jackson <Andrew.Jackson@arm.com>, "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>, "dri-devel@lists.freedesktop.org" <dri-devel@lists.freedesktop.org>, Mark Brown <broonie@kernel.org>, Philipp Zabel <p.zabel@pengutronix.de>, Dave Airlie <airlied@gmail.com>
List-Id: devicetree@vger.kernel.org

On 01/13/2015 09:26 PM, Russell King - ARM Linux wrote:
> SCLK: _~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_
>    WS: __~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~________________________________~
> I2S1: llmm............................llmm............................llm
> I2S2: llmm............................llmm............................llm
> I2S3: llmm............................llmm............................llm
> I2S4: llmm............................llmm............................llm
>
> So, what I'm saying is that it is_impossible_  to drive the TDA998x using
> multiple I2S streams which are not produced by the same I2S block.

This is besides the point, but it is possible that one of the multiple =

I2S blocks is the bit-clock and frame-clock master to the i2s bus and =

the others are slaves to it (banging their bits according to SCLK and WS =

of the I2S master). However, in this situation there really is only one =

i2s bus with multiple data pins.

Just my 0.02=80 to this discussion.