[PATCH 0/2] gpu: host1x: syncpt_wait micro-optimizations

[Tanmay Patil <tanmayp@nvidia.com>]

This series reduces the latency in host1x syncpoint wait path.

Patch 1 removes redundant MMIO reads in host1x_syncpt_wait().
Patch 2 skips the host1x_intr_update_hw_state() call in the ISR
when no fences remain.

Measured syncpoint wait latency (50000 samples):
  Average latency:   12.2 us  -> 9.4 us
  99.99 pct latency: 62.96 us -> 36.58 us

Tanmay Patil (2):
  gpu: host1x: skip redundant syncpoint loads in host1x_syncpt_wait()
  gpu: host1x: skip redundant HW state update

 drivers/gpu/host1x/intr.c   |  8 ++++++--
 drivers/gpu/host1x/syncpt.c | 23 ++++++++++++++---------
 2 files changed, 20 insertions(+), 11 deletions(-)

-- 
2.54.0