linux-kernel - Re: [PATCH] si2157: Add support for Logilink VG0022A.

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Date:   Wed, 2 Oct 2019 16:06:50 +0100
From:   Sean Young <sean@...s.org>
To:     Gonsolo <gonsolo@...il.com>
Cc:     mchehab+samsung@...nel.org, crope@....fi,
        linux-media@...r.kernel.org,
        Linux Kernel <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] si2157: Add support for Logilink VG0022A.

On Wed, Oct 02, 2019 at 04:44:24PM +0200, Gonsolo wrote:
> Hi!
> 
> > You need a message and a Signed-off-by: here.
> 
> Ok, I'll try to get that right the next time.
> 
> > > +     ret = si2157_power_up(dev, client);
> > > +     if (ret)
> > > +             goto err;
> > > +     /* query chip revision */
> > > +     /* hack: do it here because after the si2168 gets 0101, commands will
> > > +      * still be executed here but no result
> >
> > I don't understand. What problem are you seeing here? Why can't you do a
> > query chip revision first?
> 
> This was explained here: https://lkml.org/lkml/2017/3/15/778. To quote:

Antti has some great suggestions in that thread:
	https://lkml.org/lkml/2017/5/24/245

Also note https://lkml.org/lkml/2017/5/26/357 if you have access to a 
logic analyser.


Sean