linux-kernel - Re: [PATCH 2/3] drm: Remove references to removed transitional helpers

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Message-ID: <20230602113640.GG26944@pendragon.ideasonboard.com>
Date:   Fri, 2 Jun 2023 14:36:40 +0300
From:   Laurent Pinchart <laurent.pinchart@...asonboard.com>
To:     Geert Uytterhoeven <geert@...ux-m68k.org>
Cc:     David Airlie <airlied@...il.com>, Daniel Vetter <daniel@...ll.ch>,
        Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
        Maxime Ripard <mripard@...nel.org>,
        Thomas Zimmermann <tzimmermann@...e.de>,
        Jonathan Corbet <corbet@....net>,
        Jyri Sarha <jyri.sarha@....fi>,
        Tomi Valkeinen <tomba@...nel.org>,
        Biju Das <biju.das.jz@...renesas.com>,
        dri-devel@...ts.freedesktop.org, linux-doc@...r.kernel.org,
        linux-renesas-soc@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/3] drm: Remove references to removed transitional
 helpers

Hi Geert,

On Fri, Jun 02, 2023 at 01:17:58PM +0200, Geert Uytterhoeven wrote:
> On Fri, Jun 2, 2023 at 1:05 PM Laurent Pinchart wrote:
> > On Fri, Jun 02, 2023 at 11:11:35AM +0200, Geert Uytterhoeven wrote:
> > > The transitional helpers were removed a long time ago, but some
> > > references stuck.  Remove them.
> > >
> > > Fixes: 21ebe615c16994f3 ("drm: Remove transitional helpers")
> > > Signed-off-by: Geert Uytterhoeven <geert+renesas@...der.be>
> 
> > > --- a/drivers/gpu/drm/drm_plane_helper.c
> > > +++ b/drivers/gpu/drm/drm_plane_helper.c
> > > @@ -51,14 +51,6 @@
> > >   * planes, and newly merged drivers must not rely upon these transitional
> > >   * helpers.
> > >   *
> >
> > The first paragraph starts with "This helper library has two parts.". As
> > you're dropping the mention of the second part, I think you should
> > rework the first paragraph too.
> 
> That was my initial thought, too.
> However, the code still has a second part, not related to the topic of
> the first part (primary plane support).

How about mentioning that in the comment then ?

> > > - * The second part also implements transitional helpers which allow drivers to
> > > - * gradually switch to the atomic helper infrastructure for plane updates. Once
> > > - * that switch is complete drivers shouldn't use these any longer, instead using
> > > - * the proper legacy implementations for update and disable plane hooks provided
> > > - * by the atomic helpers.
> > > - *
> > > - * Again drivers are strongly urged to switch to the new interfaces.
> > > - *
> > >   * The plane helpers share the function table structures with other helpers,
> > >   * specifically also the atomic helpers. See &struct drm_plane_helper_funcs for
> > >   * the details.

-- 
Regards,

Laurent Pinchart