This patchset addresses a couple of issues with the i915 gmbus
implementation.

v6 is a rebased and trimmed version of the patchset,
since the first few patches have already been merged onto drm-intel-next-queued.
 * Cleans up INDEX cycle implementation
 * Only remove POSTING_READ() when it immediately precedes another I915_READ().

Daniel Kurtz (7):
  drm/i915/intel_i2c: handle zero-length writes
  drm/i915/intel_i2c: use double-buffered writes
  drm/i915/intel_i2c: always wait for IDLE before clearing NAK
  drm/i915/intel_i2c: use WAIT cycle, not STOP
  drm/i915/intel_i2c: use INDEX cycles for i2c read transactions
  drm/i915/intel_i2c: reuse GMBUS2 value read in polling loop
  drm/i915/intel_i2c: remove POSTING_READ() from gmbus transfers

 drivers/gpu/drm/i915/intel_i2c.c |  159 ++++++++++++++++++++++++++++----------
 1 files changed, 117 insertions(+), 42 deletions(-)

-- 
1.7.7.3

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