linux-kernel - Re: [PATCH] macintosh/adb-iop: Send correct poll command

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Message-ID: <alpine.LNX.2.23.453.2012051340490.6@nippy.intranet>
Date:   Sat, 5 Dec 2020 14:10:21 +1100 (AEDT)
From:   Finn Thain <fthain@...egraphics.com.au>
To:     Geert Uytterhoeven <geert@...ux-m68k.org>
cc:     Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Michael Ellerman <mpe@...erman.id.au>,
        Joshua Thompson <funaho@...ai.org>,
        linuxppc-dev <linuxppc-dev@...ts.ozlabs.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] macintosh/adb-iop: Send correct poll command

On Fri, 4 Dec 2020, Geert Uytterhoeven wrote:

> Hi Finn,
> 
> On Fri, Nov 20, 2020 at 5:54 AM Finn Thain <fthain@...egraphics.com.au> wrote:
> > The behaviour of the IOP firmware is not well documented but we do know
> > that IOP message reply data can be used to issue new ADB commands.
> > Use the message reply to better control autopoll behaviour by sending
> > a Talk Register 0 command after every ADB response, not unlike the
> > algorithm in the via-macii driver. This poll command is addressed to
> > that device which last received a Talk command (explicit or otherwise).
> >
> > Cc: Joshua Thompson <funaho@...ai.org>
> > Fixes: fa3b5a9929fc ("macintosh/adb-iop: Implement idle -> sending state transition")
> 
> WARNING: Unknown commit id 'fa3b5a9929fc', maybe rebased or not pulled?
> 
> 32226e817043?
> 

Yes, that's the one. I accidentally gave a commit id from one of my 
backport branches.

> > Tested-by: Stan Johnson <userm57@...oo.com>
> > Signed-off-by: Finn Thain <fthain@...egraphics.com.au>
> 
> Thanks, will queue in the m68k for-v5.11 branch.
> 

Thanks.

> Gr{oetje,eeting}s,
> 
>                         Geert
> 
>