From 28964cf25ee67e1128f7fbb7da3a792471adf47e Mon Sep 17 00:00:00 2001 From: Lionel Landwerlin Date: Thu, 3 Aug 2017 17:58:10 +0100 Subject: [PATCH] drm/i915/perf: disable NOA logic when not used We already do it on Haswell and the documentation says it saves power. Signed-off-by: Lionel Landwerlin Reviewed-by: Matthew Auld Link: https://patchwork.freedesktop.org/patch/msgid/20170803165812.2373-5-lionel.g.landwerlin@intel.com --- 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 f1993bbfd4fa..06a5e1e83e6c 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) -- 2.11.0