FreeBSD framebuffer

[blubee blubeeme]

On Mon, Jan 8, 2018 at 6:58 PM, Greg V <greg at unrelenting.technology> wrote:

> On 01/08/2018 12:49, blubee blubeeme wrote:
>
>> Two questions:
>>
>> I'm curious why the new console driver vt doesn't have a vesa driver when
>> the traditional syscons driver did.
>>
>> https://wiki.freebsd.org/Newcons
>>
>> Is there any specific reason why vesa driver wasn't implemented?
>>
> Do not read the wiki :)
>
ouch!

>
> I'm not sure what "VGA vesa" even means in that table.
> Of course vt supports legacy BIOS VGA output, IIRC including resolutions
> higher than 640x480.

That's good to know, I asked elsewhere why would vt drop support for VGA
but this explains it.

>
>
> Second:
>> Linux has Linux fbdev that act as a simple dumb framebuffer, where's
>> FreeBSD basic framebuffer?
>>
> The framebuffer API doesn't seem very well documented. But it's usually
> called 'scfb'.
> It's available as /dev/fb0, ioctls are listed in /usr/include/sys/fbio.h.
>
> It is used by the "scfb" driver in Xorg.
>
> Also there's a patch for the Weston compositor that adds support for it:
> https://reviews.freebsd.org/D10599#change-JPzq3MOnXvje
>
Thank you for these, fbio.h looks like what I was looking for!

Thank you