We already do it on Haswell and the documentation says it saves power.
Signed-off-by: Lionel Landwerlin <[email protected]>
---
drivers/gpu/drm/i915/i915_perf.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/drivers/gpu/drm/i915/i915_perf.c b/drivers/gpu/drm/i915/i915_perf.c
index ad84260de949..9b65bc8f4883 100644
--- a/drivers/gpu/drm/i915/i915_perf.c
+++ b/drivers/gpu/drm/i915/i915_perf.c
@@ -1827,6 +1827,10 @@ static void gen8_disable_metric_set(struct
drm_i915_private *dev_priv)
{
/* Reset all contexts' slices/subslices configurations. */
gen8_configure_all_contexts(dev_priv, NULL, false);
+
+ I915_WRITE(GDT_CHICKEN_BITS, (I915_READ(GDT_CHICKEN_BITS) &
+ ~GT_NOA_ENABLE));
+
}
static void gen7_oa_enable(struct drm_i915_private *dev_priv)
--
2.13.3
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