SUMMARY
KWin on Wayland starts with the VRAM locked at the highest P-state, requiring to change the resolution or refresh rate to allow the GPU to lower it. 

The lock does not happen on X11.

STEPS TO REPRODUCE
1. Start kwin-wayland
2. Run 'cat /sys/class/drm/card0/device/pp_dpm_mclk'
3. VRAM P-state will be set to the highest state and will not allow the GPU to lower it
4. Change resolution or refresh rate
5. Now the GPU can change the p-state according to load

OBSERVED RESULT
$ cat /sys/class/drm/card0/device/pp_dpm_mclk
0: 96Mhz
1: 456Mhz 
2: 675Mhz 
3: 1124Mhz * 

EXPECTED RESULT
P-state should not be locked at the highest state

SOFTWARE/OS VERSIONS
Linux: Artix Linux (radeonsi, navi22, LLVM 17.0.6, DRM 3.57, Mesa 24.0.5, 6.8.5-273-tkg-eevdf)
KDE Plasma Version: 6.0.3
KDE Frameworks Version: 6.1.0
Qt Version: 6.7.0