linux-kernel - Re: [PATCH v2 5/5] misc: add ge-addon-connector driver

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Date: Fri, 10 May 2024 17:32:48 +0200
From: Luca Ceresoli <luca.ceresoli@...tlin.com>
To: "Arnd Bergmann" <arnd@...db.de>, "Greg Kroah-Hartman"
 <gregkh@...uxfoundation.org>
Cc: "Rob Herring" <robh@...nel.org>, "Krzysztof Kozlowski"
 <krzk+dt@...nel.org>, "Conor Dooley" <conor+dt@...nel.org>, "Andrzej Hajda"
 <andrzej.hajda@...el.com>, "Neil Armstrong" <neil.armstrong@...aro.org>,
 "Robert Foss" <rfoss@...nel.org>, "laurent.pinchart"
 <Laurent.pinchart@...asonboard.com>, "Jonas Karlman" <jonas@...boo.se>,
 "Jernej Skrabec" <jernej.skrabec@...il.com>, "Maarten Lankhorst"
 <maarten.lankhorst@...ux.intel.com>, "Maxime Ripard" <mripard@...nel.org>,
 "Thomas Zimmermann" <tzimmermann@...e.de>, "Dave Airlie"
 <airlied@...il.com>, "Daniel Vetter" <daniel@...ll.ch>,
 "derek.kiernan@....com" <derek.kiernan@....com>, "dragan.cvetic@....com"
 <dragan.cvetic@....com>, "Saravana Kannan" <saravanak@...gle.com>, "Paul
 Kocialkowski" <contact@...lk.fr>, "Herve Codina"
 <herve.codina@...tlin.com>, "Thomas Petazzoni"
 <thomas.petazzoni@...tlin.com>, devicetree@...r.kernel.org,
 linux-kernel@...r.kernel.org, dri-devel@...ts.freedesktop.org, "Paul
 Kocialkowski" <paul.kocialkowski@...tlin.com>
Subject: Re: [PATCH v2 5/5] misc: add ge-addon-connector driver

Hi Greg, Arnd,

On Fri, 10 May 2024 12:57:24 +0200
"Arnd Bergmann" <arnd@...db.de> wrote:

> On Fri, May 10, 2024, at 12:54, Luca Ceresoli wrote:
> > On Fri, 10 May 2024 12:24:06 +0200 "Arnd Bergmann" <arnd@...db.de> wrote:  
> >> On Fri, May 10, 2024, at 09:55, Greg Kroah-Hartman wrote:  
> >> > On Fri, May 10, 2024 at 09:10:41AM +0200, Luca Ceresoli wrote:    
> >> >>  
> >> >> +config GE_SUNH_CONNECTOR
> >> >> +	tristate "GE SUNH hotplug add-on connector"
> >> >> +	depends on OF
> >> >> +	select OF_OVERLAY
> >> >> +	select FW_LOADER
> >> >> +	select NVMEM
> >> >> +	select DRM_HOTPLUG_BRIDGE    
> >> >
> >> > Can these be depends instead of select?  'select' causes dependencies
> >> > that are hard, if not almost impossible, to detect at times why
> >> > something is being enabled.    
> >> 
> >> I think FW_LOADER needs to be 'select' since it is normally
> >> a hidden symbol and gets selected by its users, all the other
> >> ones should be 'depends on'.  
> >
> > I see, makes sense.
> >
> > And as you pointed that out, I realize perhaps DRM_HOTPLUG_BRIDGE could
> > become a hidden symbol as it's not expected to be used alone.  
> 
> It's slightly easier to keep it as a visible symbol
> with 'depends on' though, since otherwise you have to
> add 'depends on' statments for anything that DRM_HOTPLUG_BRIDGE
> in turn depends on, most notably DRM itself.

I see, sure. Thanks both, changes applied locally.

Luca

-- 
Luca Ceresoli, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com