svn commit: r241091 - stable/9/sys/dev/drm2/i915

[Alexander Motin]

Author: mav
Date: Mon Oct  1 08:33:39 2012
New Revision: 241091
URL: http://svn.freebsd.org/changeset/base/241091

Log:
  MFC r240917:
  Reduce delays in several wait loops from 10ms to 10us, same is it is done
  in Linux. This substantially increases graphics performance on Ivy Bridge.
  
  Submitted by: avg@
  Reviewed by:  kib@

Modified:
  stable/9/sys/dev/drm2/i915/i915_drv.c
Directory Properties:
  stable/9/sys/   (props changed)
  stable/9/sys/dev/   (props changed)

Modified: stable/9/sys/dev/drm2/i915/i915_drv.c
==============================================================================
--- stable/9/sys/dev/drm2/i915/i915_drv.c       Mon Oct  1 08:32:05 2012        
(r241090)
+++ stable/9/sys/dev/drm2/i915/i915_drv.c       Mon Oct  1 08:33:39 2012        
(r241091)
@@ -486,14 +486,14 @@ __gen6_gt_force_wake_get(struct drm_i915
 
        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_i
 
        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_
                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) {
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