[PATCH v2 00/21] drm/i915/dp_mst: Enable link training fallback

[Imre Deak]

This is v2 of [1], addressing the feedback comments from Jani and Ville:

- Use a more generic 'link' substruct instead of 'link_train'. (Patch 2)
- Add the debugfs entries from intel_dp_link_training.c . (Patch 17-21)
- Add the link state check work to intel_digital_port instead of
  intel_dp, to allow using it later for HDMI. (Patch 7)
- Keep using the atomic state to look up MST connectors, avoiding the
  access to any object's current state. (Patch 9)
- Add a separate debugfs entry to get the max link rate/lane count.
  (Patch 18)

[1] https://lore.kernel.org/all/20240514191418.2863344-1-imre.deak@intel.com

Cc: Jani Nikula <jani.nikula at intel.com>
Cc: Ville Syrjälä <ville.syrjala at linux.intel.com>

Imre Deak (21):
  drm/i915/dp_mst: Align TUs to avoid splitting symbols across MTPs
  drm/i915/dp: Move link train params to a substruct in intel_dp
  drm/i915/dp: Move link train fallback to intel_dp_link_training.c
  drm/i915/dp: Sanitize intel_dp_get_link_train_fallback_values()
  drm/i915: Factor out function to modeset commit a set of pipes
  drm/i915/dp: Use a commit modeset for link retraining MST links
  drm/i915/dp: Recheck link state after modeset
  drm/i915/dp: Reduce link params only after retrying with unchanged
    params
  drm/i915/dp: Pass atomic state to link training function
  drm/i915/dp: Send a link training modeset-retry uevent to all MST
    connectors
  drm/i915/dp: Use check link state work in the hotplug handler
  drm/i915/dp: Use check link state work in the detect handler
  drm/i915/dp: Use check link state work in the HPD IRQ handler
  drm/i915/dp: Disable link retraining after the last fallback step
  drm/i915/dp_mst: Reset intel_dp->link_trained during disabling
  drm/i915/dp_mst: Enable link training fallback for MST
  drm/i915/dp: Add debugfs entries to set a target link rate/lane count
  drm/i915/dp: Add debugfs entries to get the max link rate/lane count
  drm/i915/dp: Add debugfs entry to force link training failure
  drm/i915/dp: Add debugfs entry to force link retrain
  drm/i915/dp: Add debugfs entry for link training info

 drivers/gpu/drm/i915/display/g4x_dp.c         |  29 +-
 drivers/gpu/drm/i915/display/intel_ddi.c      |  64 +-
 drivers/gpu/drm/i915/display/intel_ddi.h      |   4 +
 drivers/gpu/drm/i915/display/intel_display.c  |  34 ++
 drivers/gpu/drm/i915/display/intel_display.h  |   3 +
 .../drm/i915/display/intel_display_debugfs.c  |   2 +
 .../drm/i915/display/intel_display_types.h    |  26 +-
 drivers/gpu/drm/i915/display/intel_dp.c       | 241 ++++----
 drivers/gpu/drm/i915/display/intel_dp.h       |   8 +-
 .../drm/i915/display/intel_dp_link_training.c | 545 +++++++++++++++++-
 .../drm/i915/display/intel_dp_link_training.h |   8 +-
 drivers/gpu/drm/i915/display/intel_dp_mst.c   |  30 +-
 12 files changed, 805 insertions(+), 189 deletions(-)

-- 
2.43.3