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drm/i915: Fix BDW PPGTT error path 

When we fail for some reason on loading the PDPs, it would be wise to
disable the PPGTT in the ring registers. If we do not do this, we have
undefined results.

Signed-off-by: Ben Widawsky <ben@bwidawsk.net>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Ben Widawsky 2013-11-25 09:54:32 -08:00 committed by Daniel Vetter
parent d629336b6a
commit d595bd4bbd
1 changed files with 7 additions and 1 deletions
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8
drivers/gpu/drm/i915/i915_gem_gtt.c
View File

@ -238,10 +238,16 @@ static int gen8_ppgtt_enable(struct drm_device *dev)
for_each_ring(ring, dev_priv, j) {
ret = gen8_write_pdp(ring, i, addr);
if (ret)
return ret;
goto err_out;
}
}
return 0;
err_out:
for_each_ring(ring, dev_priv, j)
I915_WRITE(RING_MODE_GEN7(ring),
_MASKED_BIT_DISABLE(GFX_PPGTT_ENABLE));
return ret;
}
static void gen8_ppgtt_clear_range(struct i915_address_space *vm,