Re: [PATCH v1 04/35] drm/modes: Introduce 480i and 576i modes

[Maxime Ripard]

On Mon, Aug 29, 2022 at 04:14:54PM +0200, Geert Uytterhoeven wrote:
> Hi Maxime,
> 
> On Mon, Aug 29, 2022 at 3:30 PM Maxime Ripard <maxime@xxxxxxxxxx> 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.

Yeah, sorry I meant wider as in larger than the active area, without any
direction in mind. Thanks for the correction :)

Maxime

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