Re: [PATCH 0/6] drm/tiny/st7735r: Match up with staging/fbtft driver

[Maxime Ripard <maxime@cerno.tech>]

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Hi Geert,

On Tue, Nov 30, 2021 at 09:13:45AM +0100, Geert Uytterhoeven wrote:
> On Mon, Nov 29, 2021 at 11:17 PM Maxime Ripard <maxime@cerno.tech> wrote:
> > The problem that fbtft (and this series) wants to fix is completely
> > different though: it wants to address the issue the users are facing.
> > Namely, you get a cheap display from wherever, connect it to your shiny
> > new SBC and wants to get something on the display.
> >
> > In this situation, the user probably doesn't have the knowledge to
> > introduce the compatible in the kernel in the first place. But there's
> > also some technical barriers there: if they use secure boot, they can't
> > change the kernel (well, at least the knowledge required is far above
> > what we can expect from the average user). If the platform doesn't allow
> 
> If you can change the DT, you can introduce a vulnerability to change
> the kernel ;-)

Indeed

> > access to the DT, you can't change the DT either.
> 
> How do people connect a cheap display from wherever to their shiny
> new SBC and make it work, without modifying DT?

Through overlays, usually. I guess it would still qualify as "DT", but
it's not the main DT

And the other issues remain the same: while the DT could be "easily"
patched, the kernel certainly isn't and we need both with the current
expectations.

Maxime

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