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From:   Geert Uytterhoeven <geert@linux-m68k.org>
Date:   Fri, 2 Jun 2023 13:17:58 +0200
Message-ID: <CAMuHMdXR79TTSAcKb=DA2mRVDgaxBERts5PQLMf+mXpZDQJu=Q@mail.gmail.com>
Subject: Re: [PATCH 2/3] drm: Remove references to removed transitional helpers
To:     Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Cc:     David Airlie <airlied@gmail.com>, Daniel Vetter <daniel@ffwll.ch>,
        Maarten Lankhorst <maarten.lankhorst@linux.intel.com>,
        Maxime Ripard <mripard@kernel.org>,
        Thomas Zimmermann <tzimmermann@suse.de>,
        Jonathan Corbet <corbet@lwn.net>,
        Jyri Sarha <jyri.sarha@iki.fi>,
        Tomi Valkeinen <tomba@kernel.org>,
        Biju Das <biju.das.jz@bp.renesas.com>,
        dri-devel@lists.freedesktop.org, linux-doc@vger.kernel.org,
        linux-renesas-soc@vger.kernel.org, linux-kernel@vger.kernel.org
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Hi Laurent,

On Fri, Jun 2, 2023 at 1:05 PM Laurent Pinchart
<laurent.pinchart@ideasonboard.com> 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@glider.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).

>
> > - * 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.

Gr{oetje,eeting}s,

                        Geert

-- 
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds