linux-kernel - Re: [PATCH v2 1/4] dt-bindings: add sunxi SPDIF transceiver bindings

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Date:	Fri, 2 Oct 2015 07:24:20 +0200
From:	Code Kipper <codekipper@...il.com>
To:	Maxime Ripard <maxime.ripard@...e-electrons.com>
Cc:	Liam Girdwood <lgirdwood@...il.com>,
	linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>,
	Mark Brown <broonie@...nel.org>,
	linux-sunxi <linux-sunxi@...glegroups.com>,
	linux-kernel@...r.kernel.org, alsa-devel@...a-project.org,
	"Andrea Venturi (pers)" <be17068@...rbole.bo.it>
Subject: Re: [PATCH v2 1/4] dt-bindings: add sunxi SPDIF transceiver bindings

>> +
>> +  - compatible               : should be one of the following:
>> +    - "allwinner,sun4i-a10-spdif": for the Allwinner A10 SoC
>> +    - "allwinner,sun7i-a20-spdif": for the Allwinner A20 SoC
>> +    - "allwinner,sun6i-a31-spdif": for the Allwinner A31 SoC
>
> Are all these compatibles really work? Is there any significant
> difference between the controller on all these SoCs?
Let us assume that there isn't any difference. Remember SPDIF details
for all of these devices is sketchy. In the A10 User Manual, it's not
even mentioned although devices such as the Mele A2000 which I use
come with the physical connector. It's only when the A20 Manual was
released that we see the pin details and related components. We didn't
see a SPDIF block spec until the H3 User Manual was released.

Looking at the SDK code I've only seen fifo level settings to be
different for the sun6i family. It was this release that also showed
Rx rotines. The fact of the matter is we won't know until these SoCs
have been tested and with that in mind I'm happy to remove all
capabilities for now until then.

BR,
CK

>
> Thanks,
> Maxime
>
> --
> Maxime Ripard, Free Electrons
> Embedded Linux, Kernel and Android engineering
> http://free-electrons.com
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