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drm/i915/cnl: Configure EU slice power gating. 

Cannonlake also supports slice power gating on devices with more
than one slice as SKL. Let's assume that this is the same for SKL+
and exclude BXT only.

v2: Also remove KBL.

Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Reviewed-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1496781040-20888-7-git-send-email-rodrigo.vivi@intel.com
hifive-unleashed-5.1
Rodrigo Vivi 2017-06-06 13:30:36 -07:00
parent 8366be98f6
commit c7ae7e9ab2
1 changed files with 3 additions and 4 deletions
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7
drivers/gpu/drm/i915/intel_device_info.c
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@ -184,16 +184,15 @@ static void gen9_sseu_info_init(struct drm_i915_private *dev_priv)
DIV_ROUND_UP(sseu->eu_total,
sseu_subslice_total(sseu)) : 0;
/*
* SKL supports slice power gating on devices with more than
* SKL+ supports slice power gating on devices with more than
* one slice, and supports EU power gating on devices with
* more than one EU pair per subslice. BXT supports subslice
* more than one EU pair per subslice. BXT+ supports subslice
* power gating on devices with more than one subslice, and
* supports EU power gating on devices with more than one EU
* pair per subslice.
*/
sseu->has_slice_pg =
(IS_SKYLAKE(dev_priv) || IS_KABYLAKE(dev_priv)) &&
hweight8(sseu->slice_mask) > 1;
!IS_GEN9_LP(dev_priv) && hweight8(sseu->slice_mask) > 1;
sseu->has_subslice_pg =
IS_GEN9_LP(dev_priv) && sseu_subslice_total(sseu) > 1;
sseu->has_eu_pg = sseu->eu_per_subslice > 2;