Re: [PATCH 0/2] Allow disabling all native fbdev drivers and only keeping DRM emulation

Javier Martinez Canillas
2023-06-30T20:30:18Z

Andy Shevchenko <andriy.shevchenko@linux.intel.com> writes:

> On Fri, Jun 30, 2023 at 07:38:01PM +0200, Javier Martinez Canillas wrote:
>> Andy Shevchenko <andriy.shevchenko@linux.intel.com> writes:
>> > On Fri, Jun 30, 2023 at 12:51:02AM +0200, Javier Martinez Canillas wrote:
>> >> This patch series splits the fbdev core support in two different Kconfig
>> >> symbols: FB and FB_CORE. The motivation for this is to allow CONFIG_FB to
>> >> be disabled, while still having the the core fbdev support needed for the
>> >> CONFIG_DRM_FBDEV_EMULATION to be enabled. The motivation is automatically
>> >> disabling all fbdev drivers instead of having to be disabled individually.
>> >>
>> >> The reason for doing this is that now with simpledrm, there's no need for
>> >> the legacy fbdev (e.g: efifb or vesafb) drivers anymore and many distros
>> >
>> > How does simpledrm works with earlycon=efi?
>> >
>>
>> simpledrm isn't for earlycon. For that you use a different driver (i.e:
>> drivers/firmware/efi/earlycon.c). I'm just talking about fbdev drivers
>> here that could be replaced by simpledrm.
>
> So, efifb can't be replaced. Please, fix your cover letter to reduce false
> impression of the scope of usage of the simpledrm.
>

Nothing to fixup.

You are conflating the efifb fbdev driver (drivers/video/fbdev/efifb.c)
with the efifb earlycon driver (drivers/firmware/efi/earlycon.c). I'm
talking about the former (which can be replaced by simpledrm) while you
are talking about the latter.

--
Best regards,

Javier Martinez Canillas
Core Platforms
Red Hat