On Fri, Sep 6, 2024 at 5:58 PM Thinh Nguyen Thinh.Nguyen@synopsys.com wrote:
On Fri, Sep 06, 2024, Roy Luo wrote:
When dwc3_resume_common() returns an error, runtime pm is left in disabled state in dwc3_resume(). The next dwc3_suspend_common()
What issue did you see when dwc3_suspend_common is not skipped?
Apologies for the delayed response.
To answer your question, if dwc3_suspend_common() isn't skipped, it can lead to issues because dwc->dev is already in a suspended state. This could mean its parent devices (like the power domain or glue driver) are also suspended and may have released resources that dwc requires. Consequently, calling dwc3_suspend_common() in this situation could result in attempts to access unclocked or unpowered registers.
Regards, Roy Luo