[Intel-gfx] [PATCH v3] drm/i915: DP link training optimization

[Mika Kahola]

This is patch series optimizes DP link training by reusing
the link parameter settings if DP link has bee previously
trained. In case we are not able to train the link by reusing
the known values, the link training parameters are set
to zero and training is restarted.

The first patch is for eDP only where we reuse
the previously trained link training values from cache
i.e. voltage swing and pre-emphasis levels.

The second patch is a generalization to cover all cases.

Mika Kahola (1):
  drm/i915: DP link training optimization

 drivers/gpu/drm/i915/intel_dp.c  | 29 ++++++++++++++++++++++++++---
 drivers/gpu/drm/i915/intel_drv.h |  1 +
 2 files changed, 27 insertions(+), 3 deletions(-)

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1.9.1