I can't immediately find it right now but isn't there some generic way
of doing this in the runtime PM framework? If not it seems like it'd be
a good thing to add, these can't be the only devices where it'd be
useful.
Well, runtime PM can be fully controlled via sysfs, but the problem is
that the driver declares itself being runtime-enabled.
So, either we leave it default and let user-space enabling it (via
udev or other way), or introduce some condition in the driver side.
I thought someone had added a command line parameter to do it based on
dev_name(), perhaps they were just talking about it or it was in some
BSP somewhere though.
If there is a better way I am all ears. It's indeed not very elegant to
duplicate the same parameter for two different modules and it's not an
SOF-specific need.
The only way I am aware of is to play with
/sys/bus/pci/devices/xyz/power/ files but it's not very useful if you
want to disable the initial runtime pm transition which is often the
more problematic one. Completely removing runtime_pm support from all
drivers at compile time is also not very good either.
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