Re: GOP and using monitor

[Riza Dindir <riza.dindir%gmail.com@localhost>]

Hello RVP,

On Mon, Oct 4, 2021 at 12:14 AM RVP <rvp%sdf.org@localhost> wrote:
>
> On Sun, 3 Oct 2021, Riza Dindir wrote:
>
> > On Sun, Oct 3, 2021 at 3:46 PM RVP <rvp%sdf.org@localhost> wrote:
> >>
> >> Or, see if this works. In the GENERIC config:
> >>
> >> # genfb*          at pci? dev ? function ?
> >> genfb0          at pci1 dev 0 function 0
> >> genfb1          at pci0 dev 1 function 0
> >
> > Are you saying that gop will always use genfb0,
> >
>
> On NetBSD, at present, only genfb0 will be used and it will mirror
> output on all displays connected to the underlying graphics card.
> The other framebuffers (genfb1, ...) on any other cards won't be
> active.
>
> GOP is just a command to make the EFI firmware switch resolutions.
> It's needed because genfb doesn't switch resolutions on its own--it
> just uses whatever modes have been setup for it. The DRM framebuffers
> (intelfb*, radeondrmkmsfb*, nouveaufb*, ...) OTOH do pick the highest
> resolution possible on a card.
>
> > and that connecting genfb0, in the kernel, to the other radeon
> > device/output (on pci1, dev 0 fn 0) would make the monitor show
> > all the output, disabling the laptop LCD?
> >
>
> That is what we're trying to achieve, yes.

Will do that. I will get back on the result. Thank you again.

>
> -RVP

Regards,
Riza