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drm/i915: Single thread force wake isn't used on HSW anymore

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Kill the HSW check from the single thread force wake code. HSW
uses MT force wake exclusively these days.

The commit that removed HSW single thread forcewake support:

 commit 36ec8f8774
 Author: Daniel Vetter <daniel.vetter@ffwll.ch>
 Date:   Thu Oct 18 14:44:35 2012 +0200

    drm/i915: unconditionally use mt forcewake on hsw/ivb

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Ville Syrjälä 2013-03-01 14:35:39 +02:00 committed by Daniel Vetter
parent 30771e1652
commit ebd37ce1f7
1 changed files with 2 additions and 9 deletions
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11
drivers/gpu/drm/i915/intel_pm.c
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@ -4271,21 +4271,14 @@ static void __gen6_gt_force_wake_reset(struct drm_i915_private *dev_priv)
static void __gen6_gt_force_wake_get(struct drm_i915_private *dev_priv)
{
u32 forcewake_ack;
if (IS_HASWELL(dev_priv->dev))
forcewake_ack = FORCEWAKE_ACK_HSW;
else
forcewake_ack = FORCEWAKE_ACK;
if (wait_for_atomic((I915_READ_NOTRACE(forcewake_ack) & 1) == 0,
if (wait_for_atomic((I915_READ_NOTRACE(FORCEWAKE_ACK) & 1) == 0,
FORCEWAKE_ACK_TIMEOUT_MS))
DRM_ERROR("Timed out waiting for forcewake old ack to clear.\n");
I915_WRITE_NOTRACE(FORCEWAKE, 1);
POSTING_READ(ECOBUS); /* something from same cacheline, but !FORCEWAKE */
if (wait_for_atomic((I915_READ_NOTRACE(forcewake_ack) & 1),
if (wait_for_atomic((I915_READ_NOTRACE(FORCEWAKE_ACK) & 1),
FORCEWAKE_ACK_TIMEOUT_MS))
DRM_ERROR("Timed out waiting for forcewake to ack request.\n");