linux-kernel - Re: [PATCH v4 3/5] soc: qcom: Introduce APCS IPC driver

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Date:   Fri, 12 May 2017 15:48:40 -0700
From:   Bjorn Andersson <bjorn.andersson@...aro.org>
To:     Jassi Brar <jassisinghbrar@...il.com>
Cc:     Jeffrey Hugo <jhugo@...eaurora.org>,
        Andy Gross <andy.gross@...aro.org>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Ohad Ben-Cohen <ohad@...ery.com>,
        linux-arm-msm@...r.kernel.org, linux-soc@...r.kernel.org,
        Devicetree List <devicetree@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        linux-remoteproc@...r.kernel.org
Subject: Re: [PATCH v4 3/5] soc: qcom: Introduce APCS IPC driver

On Wed 10 May 19:07 PDT 2017, Jassi Brar wrote:

> On Thu, May 11, 2017 at 12:30 AM, Bjorn Andersson
> <bjorn.andersson@...aro.org> wrote:
> > On Tue 09 May 19:33 PDT 2017, Jassi Brar wrote:
[..]
> > So please let me know what you think about [1], if you don't like it
> > I'll fix the things pointed to by Stephen and we'll have to live with
> > the two calls.
> >
> My last reply was about [1]. Other platforms call
> mbox_send_data()+mbox_client_txdone() see
> drivers/firmware/tegra/bpmp.c, but you want to introduce another API
> in the innards of the framework.

Okay, lets go with that then. I will incorporate the changes requested
by Stephen and post a final version and then add the
mbox_client_txdone() in the clients.

> If we must do it, it should be done
> above the framework by introducing
> 
> void mbox_send_message_and_tick(struct mbox_chan *chan, void *mssg)
>            OR
> void mbox_ring_doorbell(struct mbox_chan *chan, void *mssg)
> {
>    (void)mbox_send_message(chan, mssg);
>    mbox_client_txdone(chan, 0);
> }

This sounds reasonable, but I would prefer that we get the two drivers
merged - so I suggest that we deal with that later, when we see if its
worth the effort.

Regards,
Bjorn