[SRU][H][PATCH 0/1] Fix no external DP output on some monitors

[Aaron Ma]

BugLink: https://bugs.launchpad.net/bugs/1938999

[Impact]
External displays not working on Thinkpad T490 with ThinkPad Thunderbolt
3 Dock

[Fix]
Some SKL systems DP output fails when AUX timeout of LTTPR detection.
Disable the LTTPR detection until GLK to fix the link training.

[Test]
Verified on hardware, external DP work fine.

[Where problems could occur]
It may break output of external DP.

This patch from 5.12-rc5, only Hirsute kernel is SRUed.

Imre Deak (1):
  drm/i915/ilk-glk: Fix link training on links with LTTPRs

 drivers/gpu/drm/i915/display/intel_dp.c           |  7 +++++++
 .../gpu/drm/i915/display/intel_dp_link_training.c | 15 ++++++++++++---
 2 files changed, 19 insertions(+), 3 deletions(-)

-- 
2.32.0