amdgpu 4k at 120Hz / HDMI 2.1

[Mario Limonciello]

On 12/31/2024 06:42, Mischa Baars wrote:
> 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?

When new specifications are made available it's not like the old one 
suddenly becomes "open", so I don't see any reason that a new 
specification would change anything.

> 
> 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.
>>
>>