amdgpu 4k at 120Hz / HDMI 2.1

[Mischa Baars]

Hi Mario,

Although unconfirmed by their website, the rumour goes that the HDMI
Forum will release a 2.2 specification somewhere in Januari. Do you
think that an open source 2.1 implementation will be allowed soon
after?

In the meantime I also checked the framerate synchronization through
glxgears at different resolutions and framerates. This does function
as expected. Although I haven't yet inspected the glxgears source
codes in detail, the OpenGL double buffering must be functional up to
some level. This means that the problem must be confined to GTK and
the GtkGLArea widget. Using GDK_BACKEND=x11 I do get a double buffered
context, but the default buffer does not alternate between GL_FRONT
and GL_BACK.

Enjoy new year's eve!

Regards,
Mischa.

On Wed, Oct 23, 2024 at 6:16 PM Mario Limonciello
<mario.limonciello at amd.com> wrote:
>
> On 10/23/2024 11:12, Mischa Baars wrote:
> >> I certainly don't have a crystal ball, but I try to avoid saying things
> >> like "never" or "for sure" in non-ephemeral contexts like mailing lists.
> >
> > I understand. I'll concentrate on different aspects of testing the
> > connection with this TV, like gdk_monitor_get_description(...) doesn't
> > return a valid description when the application is started with
> > GDK_BACKEND=x11. I also have less trivial questions about the ancient
> > and seemingly long forgotten concept of page flipping. I'll think of
> > something to do.
> >
> > Thank you for your help.
> >
>
> OK, If you have more questions about other things that come up along the
> way feel free to raise them on amd-gfx.
>
>