No variable refresh rate (VRR) on the Framework 16

[You-Sheng Yang]

Quoted from AMD proposed fix in https://<email address hidden>/T/#m94e3b7d292e359f3d656babe3ccdbf7fc6daab6f

> The monitor shipped with the Framework 16 supports VRR [1], but it's not
> being advertised.
>
> This is because the detailed timing block doesn't contain
> `EDID_DETAIL_MONITOR_RANGE` which amdgpu looks for to find min and max
> frequencies. This check however is superfluous for this case because
> update_display_info() calls drm_get_monitor_range() to get these ranges
> already.
>
> So if the `DRM_EDID_FEATURE_CONTINUOUS_FREQ` EDID feature is found then
> turn on freesync without extra checks.

See: https://www.reddit.com/r/framework/comments/1b4y2i5/no_variable_refresh_rate_on_the_framework_16_on/
See: https://www.reddit.com/r/framework/comments/1b6vzcy/framework_16_variable_refresh_rate/
See: https://community.frame.work/t/resolved-no-vrr-freesync-with-amd-version/42338
Link: https://gist.github.com/superm1/e8fbacfa4d0f53150231d3a3e0a13faf

[You-Sheng Yang (vicamo)]

The proposed v1 patch still has review comments to be addressed. Stay tuned.

[Mario Limonciello (superm1)]

V2 addressed comments and was reviewed.

[Mario Limonciello (superm1)]

FWIW it's in Linus' tree now.
https://github.com/torvalds/linux/commit/2f14c0c8cae8e9e3b603a3f91909baba66540027

[Timo Aaltonen (tjaalton)]

included via https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2060531