[Intel-gfx] [PATCH] drm/i915: Configure GPU PM in ->suspend() if not configured

[Chris Wilson]

Quoting Rushikesh S Kadam (2018-03-19 10:15:44)
> The patch implements workaround for a scenario, where the GPU Power
> Management, if not configured prior to platform suspend entry, will block
> SoC S0ix entry in suspend-to-idle.
> 
> Typically the GPU Power Management configuration is restored after a
> platform suspend cycle, in the drm ioclts callbacks (such as ioclt
> I915_GEM_EXECBUFFER2_WR).

As I indicated on the bug report, this is not how the kernel works
currently. On load/resume, enabling powermanagement is forced.

Please do test upstream.
-Chris