[PATCH 0/5] drm/dp: Fix link training interrupted by HPD pulse

[Imre Deak]

This patchset fixes a problem during Display Port link training, where
the link training is interrupted by a short HPD pulse generated by the
sink. Generally the sink signals a bad link state via such short pulses,
but the sink should prevent such signaling during link training.

Some sinks do generate a short pulse as above during link training, or a
pulse generated before the link training started may be handled from a
scheduled work during link training. Such a handling may interfere with
the link training (see patch 3 for the reason), so this patchset
prevents the handling of pulses during link training.

Imre Deak (5):
  drm/i915/hpd: Let an HPD pin be in the disabled state when handling
    missed IRQs
  drm/i915/hpd: Add support for suspending the IRQ handling on an HPD
    pin
  drm/i915/dp: Fix link training interrupted by a short HPD pulse
  drm/i915/dp: Queue a link check after link training is complete
  drm/i915/crt: Use intel_hpd_suspend/resume() instead of
    intel_hpd_disable/enable()

 drivers/gpu/drm/i915/display/intel_crt.c      |   7 +-
 .../gpu/drm/i915/display/intel_display_core.h |   2 +
 .../drm/i915/display/intel_dp_link_training.c |  23 +-
 drivers/gpu/drm/i915/display/intel_hotplug.c  | 264 ++++++++++++++----
 drivers/gpu/drm/i915/display/intel_hotplug.h  |   5 +-
 5 files changed, 237 insertions(+), 64 deletions(-)

-- 
2.44.2