linux-kernel - Re: [PATCH v2 00/28] Add support for QMC HDLC, framer infrastruture and PEF2256 framer

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Message-ID: <4eef1cf6-ace4-417f-a0ba-ec13331c8eaf@lunn.ch>
Date:   Tue, 1 Aug 2023 12:34:23 +0200
From:   Andrew Lunn <andrew@...n.ch>
To:     Herve Codina <herve.codina@...tlin.com>
Cc:     "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>, Lee Jones <lee@...nel.org>,
        Linus Walleij <linus.walleij@...aro.org>,
        Qiang Zhao <qiang.zhao@....com>, Li Yang <leoyang.li@....com>,
        Liam Girdwood <lgirdwood@...il.com>,
        Mark Brown <broonie@...nel.org>,
        Jaroslav Kysela <perex@...ex.cz>,
        Takashi Iwai <tiwai@...e.com>,
        Shengjiu Wang <shengjiu.wang@...il.com>,
        Xiubo Li <Xiubo.Lee@...il.com>,
        Fabio Estevam <festevam@...il.com>,
        Nicolin Chen <nicoleotsuka@...il.com>,
        Christophe Leroy <christophe.leroy@...roup.eu>,
        Randy Dunlap <rdunlap@...radead.org>, netdev@...r.kernel.org,
        linuxppc-dev@...ts.ozlabs.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-gpio@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, alsa-devel@...a-project.org,
        Thomas Petazzoni <thomas.petazzoni@...tlin.com>
Subject: Re: [PATCH v2 00/28] Add support for QMC HDLC, framer infrastruture
 and PEF2256 framer

> The generic framer has:
>  - 2 consumers (QMC HDLC drv and codec)
>  - 1 provider (PEF2256)
> 
> So, the design is the following:
>                         +------------------+           +---------+
>                         | QMC              | <- TDM -> | PEF2256 | <-> E1
>      +---------+        |  +-------------+ |           |         |
>      | CPU DAI | <-data--> | QMC channel | |           |         |
>      +---------+        |  +-------------+ |           |         |
> +--------------+        |  +-------------+ |           |         |
> | QMC HDLC drv | <-data--> | QMC channel | |           |         |
> +--------------+        |  +-------------+ |           |         |
>      ^                  +------------------+           |         |
>      |   +--------+     +-------------+                |         |
>      +-> | framer | <-> | PEF2256 drv | <- local bus ->|         |
>          |        |     |             |                +---------+
>      +-> |        |     |             |
>      |   +--------+     |  +-------+  |
>      +-------------------> | codec |  |
>                         |  +-------+  |
>                         +-------------+

Thanks for adding the framer framework. I did not look into all the
details, but the basic design looks good.

	 Andrew