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Reduce delays in several wait loops from 10ms to 10us, same is it is done

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in Linux. This substantially increases graphics performance on Ivy Bridge.

Submitted by:	avg@
Reviewed by:	kib@
This commit is contained in:
Alexander Motin 2012-09-25 10:52:49 +00:00
parent 23f44d2b30
commit aa91d1a85c
1 changed files with 5 additions and 5 deletions
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10
sys/dev/drm2/i915/i915_drv.c
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@ -486,14 +486,14 @@ __gen6_gt_force_wake_get(struct drm_i915_private *dev_priv)
count = 0;
while (count++ < 50 && (I915_READ_NOTRACE(FORCEWAKE_ACK) & 1))
DELAY(10000);
DELAY(10);
I915_WRITE_NOTRACE(FORCEWAKE, 1);
POSTING_READ(FORCEWAKE);
count = 0;
while (count++ < 50 && (I915_READ_NOTRACE(FORCEWAKE_ACK) & 1) == 0)
DELAY(10000);
DELAY(10);
}
void
@ -503,14 +503,14 @@ __gen6_gt_force_wake_mt_get(struct drm_i915_private *dev_priv)
count = 0;
while (count++ < 50 && (I915_READ_NOTRACE(FORCEWAKE_MT_ACK) & 1))
DELAY(10000);
DELAY(10);
I915_WRITE_NOTRACE(FORCEWAKE_MT, (1<<16) | 1);
POSTING_READ(FORCEWAKE_MT);
count = 0;
while (count++ < 50 && (I915_READ_NOTRACE(FORCEWAKE_MT_ACK) & 1) == 0)
DELAY(10000);
DELAY(10);
}
void
@ -572,7 +572,7 @@ __gen6_gt_wait_for_fifo(struct drm_i915_private *dev_priv)
int loop = 500;
u32 fifo = I915_READ_NOTRACE(GT_FIFO_FREE_ENTRIES);
while (fifo <= GT_FIFO_NUM_RESERVED_ENTRIES && loop--) {
DELAY(10000);
DELAY(10);
fifo = I915_READ_NOTRACE(GT_FIFO_FREE_ENTRIES);
}
if (loop < 0 && fifo <= GT_FIFO_NUM_RESERVED_ENTRIES) {