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drm/i915: Always clear semaphore mboxes on seqno wrap 

In preparation for setting the seqno to arbitrary value on init or
through debugfs. We need to always clear the semaphores and set the
hws page seqno index by calling intel_ring_init_seqno().

v2: rewrote the commit message as suggested by Chris Wilson.

Signed-off-by: Mika Kuoppala <mika.kuoppala@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:
Mika Kuoppala 2012-12-19 11:13:07 +02:00 committed by Daniel Vetter
parent f7e98ad4d4
commit ba1a7067c0
1 changed files with 0 additions and 12 deletions
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12
drivers/gpu/drm/i915/i915_gem.c
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@ -1932,18 +1932,6 @@ i915_gem_handle_seqno_wrap(struct drm_device *dev)
struct intel_ring_buffer *ring;
int ret, i, j;
/* The hardware uses various monotonic 32-bit counters, if we
* detect that they will wraparound we need to idle the GPU
* and reset those counters.
*/
ret = 0;
for_each_ring(ring, dev_priv, i) {
for (j = 0; j < ARRAY_SIZE(ring->sync_seqno); j++)
ret |= ring->sync_seqno[j] != 0;
}
if (ret == 0)
return ret;
/* Carefully retire all requests without writing to the rings */
for_each_ring(ring, dev_priv, i) {
ret = intel_ring_idle(ring);