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Reapply "drm/i915: Avoid stalling on pending flips for legacy cursor updates"

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This reapplies commit acf4e84d61.
With async unpin this should no longer break.

Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1463490484-19540-20-git-send-email-maarten.lankhorst@linux.intel.com
Reviewed-by: Patrik Jakobsson <patrik.jakobsson@linux.intel.com>
This commit is contained in:
Maarten Lankhorst 2016-05-17 15:08:02 +02:00
parent a6747b7304
commit 95c2ccdc82
1 changed files with 7 additions and 5 deletions
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12
drivers/gpu/drm/i915/intel_display.c
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@ -12928,12 +12928,14 @@ static int intel_atomic_prepare_commit(struct drm_device *dev,
struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
struct intel_flip_work *work;
ret = intel_crtc_wait_for_pending_flips(crtc);
if (ret)
return ret;
if (!state->legacy_cursor_update) {
ret = intel_crtc_wait_for_pending_flips(crtc);
if (ret)
return ret;
if (atomic_read(&intel_crtc->unpin_work_count) >= 2)
flush_workqueue(dev_priv->wq);
if (atomic_read(&intel_crtc->unpin_work_count) >= 2)
flush_workqueue(dev_priv->wq);
}
/* test if we need to update something */
if (!needs_work(crtc_state))