linux-kernel - Re: [PATCH] docs: driver-api: firmware: add driver firmware guidelines.

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Date:   Mon, 18 Jul 2022 15:04:14 -0700
From:   Jakub Kicinski <kuba@...nel.org>
To:     Thorsten Leemhuis <linux@...mhuis.info>
Cc:     Dave Airlie <airlied@...il.com>, torvalds@...ux-foundation.org,
        Jonathan Corbet <corbet@....net>, linux-doc@...r.kernel.org,
        gregkh@...uxfoundation.org, Daniel Vetter <daniel@...ll.ch>,
        mcgrof@...nel.org, linux-kernel@...r.kernel.org,
        dri-devel@...ts.sf.net, netdev@...r.kernel.org,
        linux-wireless@...r.kernel.org, alsa-devel@...a-project.org,
        linux-media@...r.kernel.org, linux-block@...r.kernel.org,
        Dave Airlie <airlied@...hat.com>
Subject: Re: [PATCH] docs: driver-api: firmware: add driver firmware
 guidelines.

On Mon, 18 Jul 2022 11:33:11 +0200 Thorsten Leemhuis wrote:
> > If the hardware isn't
> > +  enabled by default or under development,  
> 
> Wondering if it might be better to drop the "or under development", as
> the "enabled by default" is the main part afaics. Maybe something like
> "If support for the hardware is normally inactive (e.g. has to be
> enabled manually by a kernel parameter)" would be better anyway.

It's a tricky one, I'd say something like you can break the FW ABI
"until HW becomes available for public consumption" or such.
I'm guessing what we're after is letting people break the compatibility
in early stages of the product development cycles. Pre-silicon and
bring up, but not after there are products on the market?