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drm/i915/vlv: use lower precision RC6 counter 

And add some reg defines while we're at it.  Since the units of the RC6
residency counter are actually in CZ clocks, we want to just use the
high bits or we'll overflow too frequently.

Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Jesse Barnes 2013-09-26 17:55:57 -07:00 committed by Daniel Vetter
parent 5de56df5c7
commit 49798eb2fe
2 changed files with 8 additions and 1 deletions
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4
drivers/gpu/drm/i915/i915_reg.h
View File

@ -4729,6 +4729,10 @@
GEN6_PM_RP_DOWN_TIMEOUT)
#define GEN6_GT_GFX_RC6_LOCKED 0x138104
#define VLV_COUNTER_CONTROL 0x138104
#define VLV_COUNT_RANGE_HIGH (1<<15)
#define VLV_MEDIA_RC6_COUNT_EN (1<<1)
#define VLV_RENDER_RC6_COUNT_EN (1<<0)
#define GEN6_GT_GFX_RC6 0x138108
#define GEN6_GT_GFX_RC6p 0x13810C
#define GEN6_GT_GFX_RC6pp 0x138110

5
drivers/gpu/drm/i915/intel_pm.c
View File

@ -3837,7 +3837,10 @@ static void valleyview_enable_rps(struct drm_device *dev)
I915_WRITE(GEN6_RC6_THRESHOLD, 0xc350);
/* allows RC6 residency counter to work */
I915_WRITE(0x138104, _MASKED_BIT_ENABLE(0x3));
I915_WRITE(VLV_COUNTER_CONTROL,
_MASKED_BIT_ENABLE(VLV_COUNT_RANGE_HIGH |
VLV_MEDIA_RC6_COUNT_EN |
VLV_RENDER_RC6_COUNT_EN));
if (intel_enable_rc6(dev) & INTEL_RC6_ENABLE)
rc6_mode = GEN7_RC_CTL_TO_MODE;
I915_WRITE(GEN6_RC_CONTROL, rc6_mode);