Nasty amdgpu powerplay regression Navi14/Linux 5.10

Brief summary of the problem:

Idle power draw goes from 5w -> 15w when upgrading from kernel 5.19 to kernel 5.10 resulting in increased gpu temp at idle.

Hardware description:

• CPU: FX 8300
• GPU: RX 5500 XT
• System Memory: 16gb ddr3
• Display: 1080p
• Type of Diplay Connection: HDMI

System infomration:

• Distro name and Version: Manjaro
• Kernel version: 5.10
• AMD package version: No package

How to reproduce the issue:

Watch gpu idle powerdraw&temp with kernel 5.19 and lm_sensors, upgrade to kernel 5.10 and repeat the process.

Attached files:

• Dmesg logdmesg5.9