linux-kernel - Re: [PATCH v1 00/15] Add support for MT8195 SCP 2nd core

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Message-ID: <be7c0ff9-e931-5a34-dfa3-f44071de71b1@linaro.org>
Date:   Thu, 2 Jun 2022 08:56:45 +0200
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Tinghan Shen <tinghan.shen@...iatek.com>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Mathieu Poirier <mathieu.poirier@...aro.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Lee Jones <lee.jones@...aro.org>,
        Benson Leung <bleung@...omium.org>,
        Guenter Roeck <groeck@...omium.org>,
        Daisuke Nojiri <dnojiri@...omium.org>,
        Sebastian Reichel <sebastian.reichel@...labora.com>,
        "Dustin L. Howett" <dustin@...ett.net>,
        Tzung-Bi Shih <tzungbi@...nel.org>,
        "Gustavo A. R. Silva" <gustavoars@...nel.org>,
        Prashant Malani <pmalani@...omium.org>,
        Enric Balletbo i Serra <enric.balletbo@...labora.com>,
        Brian Norris <briannorris@...omium.org>
Cc:     linux-remoteproc@...r.kernel.org, devicetree@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org, linux-kernel@...r.kernel.org,
        chrome-platform@...ts.linux.dev,
        Project_Global_Chrome_Upstream_Group@...iatek.com,
        weishunc@...gle.com
Subject: Re: [PATCH v1 00/15] Add support for MT8195 SCP 2nd core

On 02/06/2022 05:52, Tinghan Shen wrote:
> Hi Krzysztof,
>  
> On Wed, 2022-06-01 at 13:46 +0200, Krzysztof Kozlowski wrote:
>> On 01/06/2022 13:21, Tinghan Shen wrote:
>>> The MT8195 System Companion Processor(SCP) is a dual-core RISC-V MCU.
>>> Current mediatek remoteproc driver only supports bring-up single core 
>>> SCP or the 1st core of a dual-core SCP. This series support to bring-up 
>>
>>       ^^ this or is confusing a bit.
>>
>> Does this mean that MT8195 has three RISC-V MCUs?
> 
> My intention is to express that current SCP driver supports bring-up,
> 1. the single core SCP, e.g. MT8183
> 2. the 1st core of dual-core SCP, e.g. MT8195
> 
> 
> Perhaps rewriting as follows is preferable?
> 
> "The mediatek remoteproc driver currently only allows bringing up a single 
> core SCP. It only supports bringing up the 1st core in SoCs with a dual-core SCP."
>>

Yes, that sounds better. Or mention that single core case is for MT8183,
because that part got me confused.


Best regards,
Krzysztof