Comment 10 for bug 1947326

I re-enabled PSR and booted into the 5.11 kernel. I see:

=> sudo cat /sys/kernel/debug/dri/0/i915_edp_psr_status
Sink support: yes [0x03]
PSR mode: PSR2 enabled
Source PSR ctl: enabled [0xc2044a99]
Source PSR status: SLEEP [0x30000111]
Busy frontbuffer bits: 0x00000000
Frame: PSR2 SU blocks:
0 0
1 0
2 0
3 0
4 0
5 0
6 0
7 0
PSR2 selective fetch: disabled

The value for PSR status varies between SLEEP, DEEP_SLEEP, CAPTURE, and IDLE.