[Intel-gfx] [PATCH v3] drm/i915/pmu: Deprecate I915_PMU_LAST and optimize state tracking

[Chris Wilson]

Quoting Tvrtko Ursulin (2020-12-01 13:17:57)
> diff --git a/include/uapi/drm/i915_drm.h b/include/uapi/drm/i915_drm.h
> index fa1f3d62f9a6..6edcb2b6c708 100644
> --- a/include/uapi/drm/i915_drm.h
> +++ b/include/uapi/drm/i915_drm.h
> @@ -178,7 +178,7 @@ enum drm_i915_pmu_engine_sample {
>  #define I915_PMU_INTERRUPTS            __I915_PMU_OTHER(2)
>  #define I915_PMU_RC6_RESIDENCY         __I915_PMU_OTHER(3)
>  
> -#define I915_PMU_LAST I915_PMU_RC6_RESIDENCY
> +#define I915_PMU_LAST /* Deprecated - do not use */ I915_PMU_RC6_RESIDENCY

Do we still update the value, or let it rot?
-Chris