[Intel-gfx] [PATCH] drm/i915/uc: Add function to define defaults for GuC/HuC enable

[Chris Wilson]

Quoting John Harrison (2021-01-14 21:39:42)
> On 1/13/2021 14:07, John.C.Harrison at Intel.com wrote:
> 
>     From: John Harrison <John.C.Harrison at Intel.com>
> 
>     There is a module parameter for controlling what GuC/HuC features are
>     enabled. Setting to -1 means 'use the default'. However, the default
>     was not well defined, out of date and needs to be different across
>     platforms.
> 
>     The default is now to disable both GuC and HuC on legacy platforms
>     where legacy means TGL/RKL and anything prior to Gen12. For new
>     platforms, the default is to load HuC but not GuC as GuC submission
>     has not yet landed.
> 
> Daniele pointed out that the above wording is somewhat inaccurate. GuC is still
> loaded (in order to do HuC authentication). Better wording would be:
> 
>     The default is now to disable both GuC and HuC on legacy platforms
>     where legacy means TGL/RKL and anything prior to Gen12. For new
>     platforms, the default is to load HuC but not enable GuC submission
>     as that has not landed yet.

I did not observe any changes in default behaviour across CI, so pushed
with the amended text.
-Chris