[Intel-gfx] [PATCH 7/9] drm/i915/perf: Allow dynamic reconfiguration of the OA stream

[Chris Wilson]

Quoting Lionel Landwerlin (2019-10-10 17:07:11)
> Yeah, that's a fine interface actually.

One last thought for the interface, should we return the previous
config-id?

That limits the config-id space to long (min s32) so that we can report
the negative error code (or exclude the top 4095 values).
-Chris