[PATCH] drm/i915/guc: Disable PL1 power limit when loading GuC firmware

[Dixit, Ashutosh]

On Fri, 10 Mar 2023 16:33:58 -0800, Ashutosh Dixit wrote:
>
> On dGfx, the PL1 power limit being enabled and set to a low value results
> in a low GPU operating freq. It also negates the freq raise operation which
> is done before GuC firmware load. As a result GuC firmware load can time
> out. Such timeouts were seen in the GL #8062 bug below (where the PL1 power
> limit was enabled and set to a low value). Therefore disable the PL1 power
> limit when possible when loading GuC firmware.

There are a couple of bugs in the patch. Please don't review yet, will post
a v2. Thanks.