Runtime Power Management¶
Xe PM shall be guided by the simplicity. Use the simplest hook options whenever possible. Let’s not reinvent the runtime_pm references and hooks. Shall have a clear separation of display and gt underneath this component.
What’s next:
For now s2idle and s3 are only working in integrated devices. The next step is to iterate through all VRAM’s BO backing them up into the system memory before allowing the system suspend.
Also runtime_pm needs to be here from the beginning.
RC6/RPS are also critical PM features. Let’s start with GuCRC and GuC SLPC and no wait boost. Frequency optimizations should come on a next stage.
Internal API¶
-
int xe_pm_suspend(struct xe_device *xe)¶
Helper for System suspend, i.e. S0->S3 / S0->S2idle
Parameters
struct xe_device *xexe device instance
Return
0 on success
-
int xe_pm_resume(struct xe_device *xe)¶
Helper for System resume S3->S0 / S2idle->S0
Parameters
struct xe_device *xexe device instance
Return
0 on success