[Intel-gfx] [PATCH 1/2] drm/i915: Re-add enable_rc6 modparam

[Chris Wilson]

Quoting Stuart Summers (2019-05-14 17:46:52)
> To allow easier debug of platforms which do not fully support
> power-saving render C-state 6, add back the module parameter
> to allow RC6 flows to be disabled. Instead of directly affecting
> the RC6 states via a bitmask as done previously, use this module
> parameter to clear the has_rc6 field for these platforms.

If you know which platforms don't support rc6, don't enable rc6.
-Chris