Hi Dave,
Today's linux-next merge of the drm tree got a conflict in
drivers/gpu/drm/i915/intel_ringbuffer.c between commit 5d031e5b633d
("drm/i915: Remove use of the autoreported ringbuffer HEAD position")
from Linus' tree and commit a71d8d94525e ("drm/i915: Record the tail at
each request and use it to estimate the head") from the drm tree.
I fixed it up (see below) and can carry the fix as necessary.
--
Cheers,
Stephen Rothwell sfr@xxxxxxxxxxxxxxxx
diff --cc drivers/gpu/drm/i915/intel_ringbuffer.c
index 5361915,ca3972f..0000000
--- a/drivers/gpu/drm/i915/intel_ringbuffer.c
+++ b/drivers/gpu/drm/i915/intel_ringbuffer.c
@@@ -1132,6 -1190,23 +1190,11 @@@ int intel_wait_ring_buffer(struct intel
struct drm_device *dev = ring->dev;
struct drm_i915_private *dev_priv = dev->dev_private;
unsigned long end;
+ int ret;
- u32 head;
-
- /* If the reported head position has wrapped or hasn't advanced,
- * fallback to the slow and accurate path.
- */
- head = intel_read_status_page(ring, 4);
- if (head > ring->head) {
- ring->head = head;
- ring->space = ring_space(ring);
- if (ring->space >= n)
- return 0;
- }
+
+ ret = intel_ring_wait_request(ring, n);
+ if (ret != -ENOSPC)
+ return ret;
trace_i915_ring_wait_begin(ring);
if (drm_core_check_feature(dev, DRIVER_GEM))
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