linux-kernel - Re: [PATCH v2 0/7] of_graph: prepare for ALSA graph support

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Date:	Mon, 4 Jul 2016 23:41:48 +0000
From:	Kuninori Morimoto <kuninori.morimoto.gx@...esas.com>
To:	Rob Herring <robh@...nel.org>, Mark Brown <broonie@...nel.org>
CC:	Laurent <laurent.pinchart@...asonboard.com>,
	Guennadi <g.liakhovetski@....de>,
	Grant Likely <grant.likely@...aro.org>,
	Frank Rowand <frowand.list@...il.com>,
	Linux-Kernel <linux-kernel@...r.kernel.org>,
	Linux-DT <devicetree@...r.kernel.org>,
	Linux-ALSA <alsa-devel@...a-project.org>
Subject: Re: [PATCH v2 0/7] of_graph: prepare for ALSA graph support


Hi Rob, Mark

Thank you for your feedback

> I need to see how you want to use this. I'm not completely convinced 
> this is necessary as the port number should be meaningful. For example, 
> port 0 is video and port 1 is audio. This information is specific to the 
> local parent node which could be problematic if you have generic code 
> parsing the local node. However, if you know which local port is audio, 
> then you know the remote endpoint's port is also the audio port. 

Yes, as you pointed, sound side (= ALSA SoC) will use generic driver
for sound card which needs to know its total port number.
Then, these patches are needed.

I posted OF graph part only this time, but of course I have total full-set
in my local environment.
But these are ...
 1) cleanup current generic sound driver (= almost 30 patch)
 2) OF graph new feature (= this patch-set) (= almost 10 patch)
 3) OF graph base generic sound driver (= almost 30 patch)
 - ...

I'm posting 1) part to ALSA SoC ML, 2) part to this ML.
1) will take more long term >> Mark ??
If you want to see this patch-set together with use case, then 3) is needed.
If so, I will merge 2) and 3), and post these to this ML and ALSA SoC ML.

Is it OK for you ? >> Rob, Mark
I don't know how to handle it, but I can follow your opinion

> In general, all these helpers look okay if you have a user for them.

Thanks.
As I explained above, it is based on 1) part, but it will takes more
long term.