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

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Date:   Fri, 4 Dec 2020 11:03:30 +0100
From:   Geert Uytterhoeven <geert@...ux-m68k.org>
To:     Finn Thain <fthain@...egraphics.com.au>
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

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?

> 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.

Gr{oetje,eeting}s,

                        Geert

-- 
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@...ux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds