linux-kernel - Re: [PATCH] remoteproc: qcom: Introduce Hexagon V5 based WCSS driver

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Message-ID: <20180607041134.GF16230@vkoul-mobl>
Date:   Thu, 7 Jun 2018 09:41:34 +0530
From:   Vinod <vkoul@...nel.org>
To:     Bjorn Andersson <bjorn.andersson@...aro.org>
Cc:     Sricharan R <sricharan@...eaurora.org>, ohad@...ery.com,
        robh+dt@...nel.org, mark.rutland@....com, andy.gross@...aro.org,
        david.brown@...aro.org, linux-remoteproc@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-msm@...r.kernel.org, linux-soc@...r.kernel.org,
        sibis@...eaurora.org
Subject: Re: [PATCH] remoteproc: qcom: Introduce Hexagon V5 based WCSS driver

On 06-06-18, 09:17, Bjorn Andersson wrote:
> On Tue 05 Jun 05:56 PDT 2018, Sricharan R wrote:
> 
> > Hi Vinod,
> > 
> > On 6/5/2018 11:49 AM, Vinod wrote:
> > > On 05-06-18, 11:12, Sricharan R wrote:
> > > 
> > >> +config QCOM_Q6V5_WCSS
> > >> +	tristate "Qualcomm Hexagon based WCSS Peripheral Image Loader"
> > >> +	depends on OF && ARCH_QCOM
> > >> +	depends on QCOM_SMEM
> > >> +	depends on RPMSG_QCOM_SMD || (COMPILE_TEST && RPMSG_QCOM_SMD=n)
> > >> +	depends on RPMSG_QCOM_GLINK_SMEM || RPMSG_QCOM_GLINK_SMEM=n
> > > 
> > > Is there a reason why it depends on RPMSG_QCOM_GLINK_SMEM=n? What would
> > > happen if distro wants both this and RPMSG_QCOM_GLINK_SMEM
> > > 
> 
> It says that QCOM_Q6V5_WCSS either must have a compatible state (i.e.
> builtin vs builtin, module vs builtin, but not builtin vs module) or
> that it's disabled, in which case we will hit the stub functions in
> qcom_glink.h.
> 
> I.e. this prevents QCOM_Q6V5_WCSS to be compiled builtin when
> RPMSG_QCOM_GLINK_SMEM is module, as this would give us both stubs and
> the module.

IIUC, you want to have QCOM_Q6V5_WCSS and RPMSG_QCOM_GLINK_SMEM as
modules or builtin

So, wouldn't Kconfig syntax something like where we say:
        M if RPMSG_QCOM_GLINK_SMEM=m
        bool if RPMSG_QCOM_GLINK_SMEM=y

Which makes it clear that both these have to be same type?

-- 
~Vinod