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drm/i915/bdw: Do not initialize PPGTT in the legacy way for execlists

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A pending commit removes synchronous mode from switch_mm.  This breaks
execlists because switch_mm will always try to write to the legacy ring
buffer.

Return immediately from i915_ppgtt_init_gw in execlists mode.
No longer check for execlists mode in gen8_ppgtt_enable() because this
will no longer be called in execlists mode.

Signed-off-by: Thomas Daniel <thomas.daniel@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Thomas Daniel 2014-08-20 16:24:50 +01:00 committed by Daniel Vetter
parent 975d568ade
commit 671b50134c
1 changed files with 6 additions and 6 deletions
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12
drivers/gpu/drm/i915/i915_gem_gtt.c
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@ -777,12 +777,6 @@ static void gen8_ppgtt_enable(struct drm_device *dev)
struct intel_engine_cs *ring;
int j;
/* In the case of execlists, PPGTT is enabled by the context descriptor
* and the PDPs are contained within the context itself. We don't
* need to do anything here. */
if (i915.enable_execlists)
return;
for_each_ring(ring, dev_priv, j) {
I915_WRITE(RING_MODE_GEN7(ring),
_MASKED_BIT_ENABLE(GFX_PPGTT_ENABLE));
@ -1126,6 +1120,12 @@ int i915_ppgtt_init_hw(struct drm_device *dev)
struct i915_hw_ppgtt *ppgtt = dev_priv->mm.aliasing_ppgtt;
int i, ret = 0;
/* In the case of execlists, PPGTT is enabled by the context descriptor
* and the PDPs are contained within the context itself. We don't
* need to do anything here. */
if (i915.enable_execlists)
return 0;
if (!USES_PPGTT(dev))
return 0;