[Intel-gfx] [PATCH 22/62] drm/i915/bdw: Implement Full Force Miss disables

[Ben Widawsky]

Implements WaVSRefCountFullforceMissDisable
Implements WaDSRefCountFullforceMissDisable

v2: Rebased on the HSW patch (which fixed the bug from v1)
commit 41c0b3a88c7bae96d8e2ee60c7ed91f57fd152d7
Author: Ben Widawsky <ben at bwidawsk.net>
Date:   Sat Jan 26 11:52:00 2013 -0800

    drm/i915: Implement WaVSRefCountFullforceMissDisable

Cc: Ville Syrjälä <ville.syrjala at linux.intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala at linux.intel.com>
Signed-off-by: Ben Widawsky <ben at bwidawsk.net>
---
 drivers/gpu/drm/i915/i915_reg.h | 1 +
 drivers/gpu/drm/i915/intel_pm.c | 4 ++++
 2 files changed, 5 insertions(+)

diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index 9929750..68b877d 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -990,6 +990,7 @@
 
 #define GEN7_FF_THREAD_MODE		0x20a0
 #define   GEN7_FF_SCHED_MASK		0x0077070
+#define   GEN7_FF_DS_REF_CNT_FFME	(1 << 19)
 #define   GEN7_FF_TS_SCHED_HS1		(0x5<<16)
 #define   GEN7_FF_TS_SCHED_HS0		(0x3<<16)
 #define   GEN7_FF_TS_SCHED_LOAD_BALANCE	(0x1<<16)
diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
index abc51ea..81ec2c3 100644
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -5147,6 +5147,10 @@ static void gen7_setup_fixed_func_scheduler(struct drm_i915_private *dev_priv)
 	if (IS_HASWELL(dev_priv->dev))
 		reg &= ~GEN7_FF_VS_REF_CNT_FFME;
 
+	/* WaVSRefCountFullforceMissDisable|WaDSRefCountFullforceMissDisable */
+	if (IS_GEN8(dev_priv->dev))
+		reg &= ~(GEN7_FF_DS_REF_CNT_FFME | GEN7_FF_VS_REF_CNT_FFME);
+
 	I915_WRITE(GEN7_FF_THREAD_MODE, reg);
 }
 
-- 
1.8.4.2