[PATCH v2 0/4] drm/i915/dp: Implement POST_LT_ADJ_REQ

[Ville Syrjala]

From: Ville Syrjälä <ville.syrjala at linux.intel.com>

Implement the POST_LT_ADJ_REQ sequence, which is supposed
to be used to further tune the link vswing/pre-emphasis
when TPS4 is not supported.

Unfortunately I don't have any displays/dongles that support
this so I wasn't able to test anything. Imre has tested this
with a DP tester though.

v2: rebase after all the prep stuff got merged

Ville Syrjälä (4):
  drm/dp: Add definitions for POST_LT_ADJ training sequence
  drm/dp: Add POST_LT_ADJ_REQ helpers
  drm/i915/dp: Implement the POST_LT_ADJ_REQ sequence
  hax: drm/i915: Disable TPS4 support to force POST_LT_ADJ_REQ usage

 drivers/gpu/drm/display/drm_dp_helper.c       |   8 ++
 .../drm/i915/display/intel_dp_link_training.c | 131 +++++++++++++++++-
 .../drm/i915/display/intel_dp_link_training.h |   2 +-
 drivers/gpu/drm/i915/display/intel_dp_mst.c   |   2 +-
 include/drm/display/drm_dp.h                  |   3 +
 include/drm/display/drm_dp_helper.h           |   8 ++
 6 files changed, 150 insertions(+), 4 deletions(-)

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2.49.0