linux-kernel - Re: [PATCH] dts: juno: Enable coresight tmc scatter gather in ETR

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Message-ID: <20180911103509.GA770@e107155-lin>
Date:   Tue, 11 Sep 2018 11:35:09 +0100
From:   Sudeep Holla <sudeep.holla@....com>
To:     Suzuki K Poulose <suzuki.poulose@....com>,
        linux-arm-kernel@...ts.infradead.org
Cc:     Sudeep Holla <sudeep.holla@....com>, linux-kernel@...r.kernel.org,
        mathieu.poirier@...aro.org, coresight@...ts.linaro.org,
        robert.walker@....com, devicetree@...r.kernel.org, robh@...nel.org,
        Mike Leach <mike.leach@...aro.org>,
        Liviu Dudau <liviu.dudau@....com>,
        Lorenzo Pierlisi <lorenzo.pieralisi@....com>
Subject: Re: [PATCH] dts: juno: Enable coresight tmc scatter gather in ETR

On 11/09/18 09:47, Suzuki K Poulose wrote:
> We do not enable scatter-gather mode in the TMC-ETR by default
> to prevent malfunctioning of systems where the ETR may not be
> properly connected to the memory subsystem to allow for simultaneous
> READ/WRITE transactions when used in SG mode. Instead we whitelist
> the platforms where we know that it is safe to use the mode.
>
> All revisions of Juno have a proper ETR connection and hence
> white list them.
>

Applied conditionally, this conflicts with the patch Mathieu has in his
branch. He needs to drop that so that I can take both of them via ARM SoC.

--
Regards,
Sudeep