Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20;
MIME-Version: 1.0
References: <CAMuHMdUusnhYodWGCxJBu-1Hd2KW-xdT8jxE_iVdQjDo8b3Y5Q@mail.gmail.com>
 <20220817131454.qcuywcuc4ts4hswm@houat> <CAMuHMdVPEgnnsY-4uuf=FDJ0YxWpch-0kZWFT_TZfcDvXLtwWQ@mail.gmail.com>
 <20220818123934.eim2bfrgbxsmviqx@houat> <CAMuHMdWXbHkrBZgsmUnU=q52+q7UZZNO3tgQW7Men+msQ1JDwQ@mail.gmail.com>
 <20220818134200.cr22bftmjn226ehn@houat> <CAMuHMdX6dyQaB34oeXwiCa2rDkxks0qNh=ekqh7Wd2kSNED9TA@mail.gmail.com>
 <20220818154641.ouvrar5s74qu74zn@houat> <CAMuHMdUjE0mwu8z5AksW4h1OwzDCQ5h1ZoCWDi+rC4p2Pu5O4g@mail.gmail.com>
 <6d1dfaad-7310-a596-34dd-4a6d9aa95f65@gmail.com> <20220829132953.sfv5yex2dhv76vrq@houat>
In-Reply-To: <20220829132953.sfv5yex2dhv76vrq@houat>
From:   Geert Uytterhoeven <geert@linux-m68k.org>
Date:   Mon, 29 Aug 2022 16:14:54 +0200
Message-ID: <CAMuHMdXxoEYV7v-R+o4eMJEiV_xGUgpN6sUbZ95r_qewV5QpRA@mail.gmail.com>
Subject: Re: [PATCH v1 04/35] drm/modes: Introduce 480i and 576i modes
To:     Maxime Ripard <maxime@cerno.tech>
Cc:     Mateusz Kwiatkowski <kfyatek@gmail.com>,
        Jernej Skrabec <jernej.skrabec@gmail.com>,
        Martin Blumenstingl <martin.blumenstingl@googlemail.com>,
        Chen-Yu Tsai <wens@csie.org>,
        Philipp Zabel <p.zabel@pengutronix.de>,
        Jerome Brunet <jbrunet@baylibre.com>,
        Samuel Holland <samuel@sholland.org>,
        Thomas Zimmermann <tzimmermann@suse.de>,
        Daniel Vetter <daniel@ffwll.ch>, Emma Anholt <emma@anholt.net>,
        David Airlie <airlied@linux.ie>,
        Maarten Lankhorst <maarten.lankhorst@linux.intel.com>,
        =?UTF-8?Q?Noralf_Tr=C3=B8nnes?= <noralf@tronnes.org>,
        Kevin Hilman <khilman@baylibre.com>,
        Neil Armstrong <narmstrong@baylibre.com>,
        linux-sunxi@lists.linux.dev,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
        Phil Elwell <phil@raspberrypi.com>,
        Linux ARM <linux-arm-kernel@lists.infradead.org>,
        Dave Stevenson <dave.stevenson@raspberrypi.com>,
        "open list:ARM/Amlogic Meson..." <linux-amlogic@lists.infradead.org>,
        DRI Development <dri-devel@lists.freedesktop.org>,
        Dom Cobley <dom@raspberrypi.com>
Content-Type: text/plain; charset="UTF-8"
Precedence: bulk

Hi Maxime,

On Mon, Aug 29, 2022 at 3:30 PM Maxime Ripard <maxime@cerno.tech> wrote:
> On Wed, Aug 24, 2022 at 06:42:18PM +0200, Mateusz Kwiatkowski wrote:
> > - Speaking of closed captioning... a lot of different stuff were put in the
> >   blanking interval over the years. Like teletext in Europe. There are projects
> >   like VBIT2 <https://github.com/peterkvt80/vbit2> which intentionally
> >   reconfigure the Raspberry Pi composite output to include the blanking interval
> >   in the framebuffer so that teletext can be output by drawing on the edge of
> >   the "screen" (from the computer point of view).
>
> I'm not sure how we would support this in KMS to be honest. Asking for a
> wider mode and the userspace putting whatever it wants in the margins
> seems like a good choice.

s/wider/higher/

Teletext is transmitted in the "visible" parts of (horizontal) lines, but during
the vertical blank.

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