linux-kernel - Re: Re: Re: Re: [PATCH v4 12/23] ASoC: simple-card: Support DPCM DAI link with multiple Codecs

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Message-ID: <6194dad2-040b-c0f2-b269-571a303bbb08@nvidia.com>
Date:   Fri, 17 Jul 2020 18:25:15 +0530
From:   Sameer Pujar <spujar@...dia.com>
To:     Mark Brown <broonie@...nel.org>
CC:     <spujar@...dia.com>,
        Kuninori Morimoto <kuninori.morimoto.gx@...esas.com>,
        <perex@...ex.cz>, <tiwai@...e.com>, <robh+dt@...nel.org>,
        <lgirdwood@...il.com>, <thierry.reding@...il.com>,
        <jonathanh@...dia.com>, <digetx@...il.com>,
        <alsa-devel@...a-project.org>, <linux-tegra@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, <sharadg@...dia.com>,
        <mkumard@...dia.com>, <viswanathl@...dia.com>,
        <rlokhande@...dia.com>, <dramesh@...dia.com>,
        <atalambedu@...dia.com>, <nwartikar@...dia.com>,
        <swarren@...dia.com>, <nicoleotsuka@...il.com>
Subject: Re: Re: Re: Re: [PATCH v4 12/23] ASoC: simple-card: Support DPCM DAI
 link with multiple Codecs

Hi Mark,


On 7/2/2020 5:56 PM, Mark Brown wrote:
> On Thu, Jul 02, 2020 at 04:06:14PM +0530, Sameer Pujar wrote:
>
>> For the HW I am using, there are no fixed endpoints and I am not sure if it
>> is allowed to have empty endpoints in audio-graph-card. Crossbar/router
>> provides the flexibility to connect the components in any required order.
>> Patch [05/23] exposes required graph and MUX controls for the flexible
>> configurations. Mostly, in DT, I am trying to model the component itself and
>> finally router can help me specify the audio path to interconnect various
>> components. Hence I was trying to understand if it is really necessary to
>> represent the links using audio-graph-card. Kindly help me understand what
>> more it offers. If simple-card works fine, are we allowed to use it?
> The links in the graph card should be the physical links at the edge of
> the devices, those must be fixed no matter what.

I used graph-card and could get few things working with it. Based on the 
feedback so far, I am planning to split the series as suggested and send 
two series as below.
[1] Tegra AHUB series and related DT bindings as V5.
[2] Audio graph card enhancements and related DT bindings for Tegra 
platforms as V1.

Thanks,
Sameer.