From 28964cf25ee67e1128f7fbb7da3a792471adf47e Mon Sep 17 00:00:00 2001
From: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Date: Thu, 3 Aug 2017 17:58:10 +0100
Subject: [PATCH] drm/i915/perf: disable NOA logic when not used
Git-commit: 28964cf25ee67e1128f7fbb7da3a792471adf47e
Patch-mainline: v4.14-rc1
References: FATE#322643 bsc#1055900
We already do it on Haswell and the documentation says it saves power.
Signed-off-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Reviewed-by: Matthew Auld <matthew.auld@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20170803165812.2373-5-lionel.g.landwerlin@intel.com
Acked-by: Takashi Iwai <tiwai@suse.de>
---
drivers/gpu/drm/i915/i915_perf.c | 4 ++++
1 file changed, 4 insertions(+)
--- 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(stru
{
/* 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)