Can you Cc dri-devel? Quoting Kuogee Hsieh (2021-06-03 08:40:46) > Normal DP suspend operation contains two steps, display off followed > by dp suspend, to complete system wide suspending cycle if display is > up at that time. In this case, DP phy will be powered off at display > off. However there is an exception case that depending on the timing > of dongle plug in during system wide suspending, sometimes display off > procedure may be skipped and dp suspend was called directly. In this > case, dp phy is stay at powered on (phy->power_count = 1) so that at > next resume dp driver crash at main link clock enable due to phy is > not physically powered on. This patch will call dp_ctrl_off_link_stream() > to tear down main link and power off phy at dp_pm_suspend() if main link > had been brought up. >
