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drm/i915: rip out old HWSTAM missed irq WA for vlv 

This got copy-pasted from an older version. The newer kinds of
workarounds don't need this anymore.

Shame on me for not noticing when picking up the vlv irq patch.

Reviewed-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-Off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Daniel Vetter 2012-03-30 20:24:33 +02:00
parent 25c063004a
commit fad2596acb
1 changed files with 0 additions and 12 deletions
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12
drivers/gpu/drm/i915/i915_irq.c
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@ -1998,18 +1998,6 @@ static void valleyview_irq_preinstall(struct drm_device *dev)
I915_WRITE(RING_IMR(GEN6_BSD_RING_BASE), 0);
I915_WRITE(RING_IMR(BLT_RING_BASE), 0);
if (IS_GEN6(dev) || IS_GEN7(dev)) {
/* Workaround stalls observed on Sandy Bridge GPUs by
* making the blitter command streamer generate a
* write to the Hardware Status Page for
* MI_USER_INTERRUPT. This appears to serialize the
* previous seqno write out before the interrupt
* happens.
*/
I915_WRITE(GEN6_BLITTER_HWSTAM, ~GEN6_BLITTER_USER_INTERRUPT);
I915_WRITE(GEN6_BSD_HWSTAM, ~GEN6_BSD_USER_INTERRUPT);
}
/* and GT */
I915_WRITE(GTIIR, I915_READ(GTIIR));
I915_WRITE(GTIIR, I915_READ(GTIIR));