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

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Message-ID: <20180911152314.GA12052@e107155-lin>
Date:   Tue, 11 Sep 2018 16:23:36 +0100
From:   Sudeep Holla <sudeep.holla@....com>
To:     Mathieu Poirier <mathieu.poirier@...aro.org>
Cc:     "Suzuki K. Poulose" <suzuki.poulose@....com>,
        linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        coresight@...ts.linaro.org, Robert Walker <robert.walker@....com>,
        devicetree@...r.kernel.org, Rob Herring <robh@...nel.org>,
        Mike Leach <mike.leach@...aro.org>,
        Liviu Dudau <liviu.dudau@....com>,
        Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
        Sudeep Holla <sudeep.holla@....com>
Subject: Re: [PATCH] dts: juno: Enable coresight tmc scatter gather in ETR

On Tue, Sep 11, 2018 at 08:47:27AM -0600, Mathieu Poirier wrote:
> On Tue, 11 Sep 2018 at 04:35, Sudeep Holla <sudeep.holla@....com> wrote:
> >
> > 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.
> 
> As I communicated yesterday, I've already dropped that patch from my tree.

Thanks Mathieu, I have applied both the patches already.

--
Regards,
Sudeep