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| author | Mika Kuoppala <mika.kuoppala@linux.intel.com> | 2012-12-10 15:41:48 +0200 |
|---|---|---|
| committer | Daniel Vetter <daniel.vetter@ffwll.ch> | 2012-12-11 13:32:26 +0100 |
| commit | f72b3435c1a75406d82d6e252bb78f009efd4bd9 (patch) | |
| tree | 5b9e854dc74ca4d52374cd6e7e816312c6daca31 /drivers/gpu/drm/i915/i915_drv.h | |
| parent | 3ac18232946aacf0a9807c3143f8449ed4aa68f4 (diff) | |
| download | lwn-f72b3435c1a75406d82d6e252bb78f009efd4bd9.tar.gz lwn-f72b3435c1a75406d82d6e252bb78f009efd4bd9.zip | |
drm/i915: Don't emit semaphore wait if wrap happened
If wrap just happened we need to prevent emitting waits for
pre wrap values. Detect this and emit no-ops instead.
v2: Use olr > seqno to detect wrap instead of *seqno == 0
as suggested by Chris Wilson.
v3: Use last used seqno to detect the wraparound. From
Chris Wilson
v4: Fixed unnecessary last_seqno assigment
References: https://bugs.freedesktop.org/show_bug.cgi?id=57967
Signed-off-by: Mika Kuoppala <mika.kuoppala@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Diffstat (limited to 'drivers/gpu/drm/i915/i915_drv.h')
| -rw-r--r-- | drivers/gpu/drm/i915/i915_drv.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h index 2ab476df1dc2..9da67824dde3 100644 --- a/drivers/gpu/drm/i915/i915_drv.h +++ b/drivers/gpu/drm/i915/i915_drv.h @@ -671,7 +671,7 @@ typedef struct drm_i915_private { struct pci_dev *bridge_dev; struct intel_ring_buffer ring[I915_NUM_RINGS]; - uint32_t next_seqno; + uint32_t last_seqno, next_seqno; drm_dma_handle_t *status_page_dmah; struct resource mch_res; |