RE: [PATCH v7 3/6] dt-bindings: mailbox: imx-mu: add generic MU channel support

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> -----Original Message-----
> From: Jassi Brar [mailto:jassisinghbrar@xxxxxxxxx]
> Sent: Monday, July 30, 2018 9:05 PM
> To: Oleksij Rempel <o.rempel@xxxxxxxxxxxxxx>
> Cc: A.s. Dong <aisheng.dong@xxxxxxx>; , Sascha Hauer
> <kernel@xxxxxxxxxxxxxx>; Shawn Guo <shawnguo@xxxxxxxxxx>; Fabio
> Estevam <fabio.estevam@xxxxxxx>; Rob Herring <robh+dt@xxxxxxxxxx>;
> Mark Rutland <mark.rutland@xxxxxxx>; Vladimir Zapolskiy
> <vladimir_zapolskiy@xxxxxxxxxx>; ", linux-arm-
> kernel"@lists.infradead.org; , linux-arm-kernel@xxxxxxxxxxxxxxxxxxx, linux-
> mediatek@xxxxxxxxxxxxxxxxxxx, srv_heupstream <linux-
> mediatek@xxxxxxxxxxxxxxxxxxx>; srv_heupstream <linux-arm-
> kernel@xxxxxxxxxxxxxxxxxxx>; Devicetree List <devicetree@xxxxxxxxxxxxxxx>;
> dl-linux-imx <linux-imx@xxxxxxx>
> Subject: Re: [PATCH v7 3/6] dt-bindings: mailbox: imx-mu: add generic MU
> channel support
> 
> On Mon, Jul 30, 2018 at 1:05 PM, Oleksij Rempel <o.rempel@xxxxxxxxxxxxxx>
> wrote:
> > Hi Aishen, Jassie,
> >
> > i'm lost in this discussion. Please, as soon as I need to add some
> > changes to my patches, notify me. Preferably on top for email.
> >
> I am ok with however you choose to implement, 8 unidirectional or 4
> bidirectional channels or whatever.
> 
> We just can't have protocol specific s/w modes in the controller drivers.
> 
> The best solution is to fix the SCU firmware. If that is _really_ impossible, I
> provided a solution (3 cells work around). If you have a better idea please
> feel free to propose and implement that.
> 
> It will also help if you could share the user code of "scu-mode". If there is no
> such code (and we know the driver doesn't respect the "scu-mode" property)
> why do we even have that binding? Maybe drop it.

The initial idea is using mbox-cells value to distinguish which MU mode is used
(single chan or multi chans).

Regards
Dong Aisheng

> 
> thnx.
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