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drm/i915: wait for rings to become idle once disabled

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make sure we wait for rings to become idle once they are
disabled. In case of timeout print an error message

Signed-off-by: Naresh Kumar Kachhi <naresh.kumar.kachhi@intel.com>
[danvet: Frob patch as suggested by Chris.]
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Naresh Kumar Kachhi
2014-03-12 16:39:41 +05:30
committed by Daniel Vetter
parent a51435a313
commit e9fea5747d
3 changed files with 6 additions and 0 deletions
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2
drivers/gpu/drm/i915/intel_ringbuffer.c
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@@ -444,6 +444,8 @@ static int init_ring_common(struct intel_ring_buffer *ring)
I915_WRITE_CTL(ring, 0);
I915_WRITE_HEAD(ring, 0);
ring->write_tail(ring, 0);
if (wait_for_atomic((I915_READ_MODE(ring) & MODE_IDLE) != 0, 1000))
DRM_ERROR("%s :timed out trying to stop ring\n", ring->name);
if (I915_NEED_GFX_HWS(dev))
intel_ring_setup_status_page(ring);