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

Imre Deak
2024-05-20T18:58:23Z

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@intel.com>
Cc: Ville Syrjälä <ville.syrjala@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(-)

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2.43.3