Re: [PATCH v4 0/6] Cleanups for the nomodeset kernel command line parameter logic

From: Pekka Paalanen
Date: Fri Nov 12 2021 - 07:10:53 EST


On Fri, 12 Nov 2021 12:20:14 +0100
Javier Martinez Canillas <javierm@xxxxxxxxxx> wrote:

> On 11/12/21 11:57, Thomas Zimmermann wrote:
>
> [snip]
>
> >>>
> >>> This is what HW-specific drivers want to query in their init/probing
> >>> code. The actual semantics of this decision is hidden from the driver.
> >>> It's also easier to read than the other name IMHO
> >>
> >> Ok, but what is a "native driver"? Or a "non-native driver"?
> >> Is that established kernel terminology?
> >>
> >> I'd think a non-native driver is something that e.g. ndiswrapper is
> >> loading. Is simpledrm like ndiswrapper in a sense? IIRC, simpledrm is
> >> the driver that would not consult this function, right?
> >
> > We use that term for hw-specific drivers. A 'non-native' driver would be
> > called generic or firmware driver.
> >
> > My concern with the 'modeset' term is that it exposes an implementation
> > detail, which can mislead a driver to to the wrong thing: a HW-specifc
> > driver that disables it's modesetting functionality would pass the test
> > for (!modeset). But that's not what we want, we want to disable all of
> > the driver and not even load it.
> >
> > How about we invert the test function and use something like
> >
> > bool drm_firmware_drivers_only()
> >
>
> That name I think is more self explanatory, so it works for me.

I'm not going to argue against that. :-)


Thanks,
pq

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