linux-kernel - Re: [PATCH] drm/panel-edp: Allow querying the detected panel via sysfs

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Date:   Wed, 26 Jan 2022 09:25:26 +0100
From:   Javier Martinez Canillas <javierm@...hat.com>
To:     Doug Anderson <dianders@...omium.org>
Cc:     dri-devel <dri-devel@...ts.freedesktop.org>,
        David Airlie <airlied@...ux.ie>,
        Robert Foss <robert.foss@...aro.org>,
        LKML <linux-kernel@...r.kernel.org>,
        Thierry Reding <thierry.reding@...il.com>, jjsu@...omium.org,
        lschyi@...omium.org, Sam Ravnborg <sam@...nborg.org>
Subject: Re: [PATCH] drm/panel-edp: Allow querying the detected panel via
 sysfs

On 1/26/22 00:25, Doug Anderson wrote:
> On Tue, Jan 25, 2022 at 2:55 PM Javier Martinez Canillas
> <javierm@...hat.com> wrote:

[snip]

>> Should this new sysfs entry be documented in Documentation/ABI/ ?
> 
> I'm not sure what the policy is here. I actually don't know that I'm
> too worried about this being an ABI. For the purposes of our tests
> then if something about this file changed (path changed or something
> like that) it wouldn't be a huge deal. Presumably the test itself
> would just "fail" in this case and that would clue us in that the ABI
> changed and we could adapt to whatever new way was needed to discover
> this.
> 
> That being said, if the policy is that everything in sysfs is supposed
> to be ABI then I can add documentation for this...
>

I also don't know the policy, hence the question. But in any case, I
think that it could even be done as a follow-up if is needed.

Best regards,
-- 
Javier Martinez Canillas
Linux Engineering
Red Hat