linux-kernel - Re: [PATCH 6/8] drm/fb-helper: Pass buffer format via drm_fb_helper_surface

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Date:   Fri, 14 Jul 2023 13:32:08 +0200
From:   Geert Uytterhoeven <geert@...ux-m68k.org>
To:     Javier Martinez Canillas <javierm@...hat.com>
Cc:     Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
        Maxime Ripard <mripard@...nel.org>,
        Thomas Zimmermann <tzimmermann@...e.de>,
        David Airlie <airlied@...il.com>,
        Daniel Vetter <daniel@...ll.ch>,
        dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 6/8] drm/fb-helper: Pass buffer format via drm_fb_helper_surface_size

Hi Javier,

On Fri, Jul 14, 2023 at 12:25 PM Javier Martinez Canillas
<javierm@...hat.com> wrote:
> Geert Uytterhoeven <geert@...ux-m68k.org> writes:
> > drm_fb_helper_single_fb_probe() first calls drm_fb_helper_find_sizes(),
> > followed by drm_fbdev_generic_helper_fb_probe():
> >   - The former tries to find a suitable buffer format, taking into
> >     account limitations of the whole display pipeline,
> >   - The latter just calls drm_mode_legacy_fb_format() again.
> >
> > Simplify this by passing the buffer format between these functions
> > via a new buffer format member in the drm_fb_helper_surface_size
> > structure.
> >
> > Signed-off-by: Geert Uytterhoeven <geert@...ux-m68k.org>
> > ---
>
> [...]
>
> > -     drm_dbg_kms(dev, "surface width(%d), height(%d) and bpp(%d)\n",
> > +     drm_info(dev, "surface width(%d), height(%d), bpp(%d) and format(%p4cc)\n",
>
> You are promoting a debug printout here to info but that change is not
> mentioned in the commit message. If you think this will be useful, maybe
> do it as a separate patch ?

Oops, that was unintentional.  Will fix in v2.

> The rest of the patch looks good to me though.
>
> Reviewed-by: Javier Martinez Canillas <javierm@...hat.com>

Thanks!

Gr{oetje,eeting}s,

                        Geert

-- 
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@...ux-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