[PATCH v1 04/35] drm/modes: Introduce 480i and 576i modes
Geert Uytterhoeven
geert at linux-m68k.org
Mon Aug 29 07:14:54 PDT 2022
Hi Maxime,
On Mon, Aug 29, 2022 at 3:30 PM Maxime Ripard <maxime at 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 at 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
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