drm dpms have many power modes, ON,OFF,SUSPEND,STANDBY, etc.
but vop only have enable/disable mode, maybe case such bug:
--> DRM_DPMS_ON: power on vop
--> DRM_DPMS_SUSPEND: power off vop
--> DRM_DPMS_OFF: already power off at SUSPEND, crash
so use a bool val is more suitable.
another problem
drm dpms have many power modes, ON,OFF,SUSPEND,STANDBY, etc.
but vop only have enable/disable mode, maybe case such bug:
-- DRM_DPMS_ON: power on vop
-- DRM_DPMS_SUSPEND: power off vop
-- DRM_DPMS_OFF: already power off at SUSPEND, crash
so use a bool val is more suitable.
another problem at
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