drm 6.1,6.6: FreeSync/VRR doesnt work correctly.

[Alexander88207]

Describe the bug
Since VRR/Freesync support came with drm 5.4 it has always worked beautifully.

Now it only works partially.

I was able to observe the following

• FreeSync kicks in and changes but stays stuck at a fixed refresh rate and wont return to normal refresh rate after leaving the game.

• Sometimes it doesn't kick in at all and you have to play around with Vsync leaver or turn on/off from VRR from the Display to wake it up.

FreeBSD version
FreeBSD Home 14.0-STABLE FreeBSD 14.0-STABLE #0 stable/14-n267114-72c3d91294c4: Thu Apr 4 05:52:43 UTC 2024 root@releng1.nyi.freebsd.org:/usr/obj/usr/src/amd64.amd64/sys/GENERIC amd64 1400510 1400510

PCI Info
vgapci0@pci0:3:0:0: class=0x030000 rev=0xc5 hdr=0x00 vendor=0x1002 device=0x73df subvendor=0x1043 subdevice=0x05cb
vendor = 'Advanced Micro Devices, Inc. [AMD/ATI]'
device = 'Navi 22 [Radeon RX 6700/6700 XT/6750 XT / 6800M/6850M XT]'
class = display
subclass = VGA

DRM KMOD version

6.1.69_2

To Reproduce

Install minetest_game and run it in fullscreen mode and set the FPS in your VRR range.

The refresh rate should change constantly if it works correctly if not then its stuck or doesnt change at all.

I do use xf86-video-amdgpu and also have tried out modesetting but same results.

Screenshots

How it should work:

How it should not work:

Here i have to wake it up for instance by changing on/off from the monitor:

[Alexander88207]

If someone else wants to try out it aswell, here is an small article about FreeSync/VRR on FreeBSD: https://wiki.freebsd.org/AlexanderVereeken/FreeSync

[Alexander88207]

Also happens with #283