[PATCH v2 00/28] drm/i915/dp_link: Refactor DP link capability logic part1

[Imre Deak <imre.deak@intel.com>]

This is v2 of the second part of [1] refactoring the DP link capability
logic in patches 27-57 of [1]. The first part of [1] was merged, see
[2]. For the rationale of this patchset, please refer to the link
capability parts in the cover letter of [1].

This v2 version has the following changes:
- Address the review comments from Jani:
  - Remove unneeded function documentation.
  - Add a helper to debug print the link rates tracked by link_caps
    instead of exposing the rates.

- Simplify tracking of link capability changes as suggested by Ville,
  removing the need to track changes or adjust the maximum link
  parameter limits set by the fallback logic. This is possible, since the
  limits are reset now (after patchset [3]) whenever any link parameter
  changes. This resulted in dropping patches 46, 48, 51 from patchset [1].

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

[1] https://lore.kernel.org/all/20260428125233.1664668-1-imre.deak@intel.com
[2] https://lore.kernel.org/all/20260601093836.3057345-1-imre.deak@intel.com
[3] https://lore.kernel.org/all/20260522160514.2628249-1-imre.deak@intel.com

Imre Deak (28):
  drm/i915/dp: Rename intel_dp_link_config to intel_dp_link_config_entry
  drm/i915/dp: Add struct intel_dp_link_config
  drm/i915/dp_link_caps: Introduce DP link capability module
  drm/i915/dp_link_caps: Move common rate helpers to link caps
  drm/i915/dp_link_caps: Move forced link param helpers to link caps
  drm/i915/dp: Simplify querying of forced link parameters
  drm/i915/dp_link_caps: Move forced and max link debugfs entries to
    link caps
  drm/i915/dp_link_training: Use helpers to get forced link params
  drm/i915/dp_link_caps: Move forced link params to link_caps
  drm/i915/dp_link_caps: Move link config helpers to link caps
  drm/i915/dp_link_caps: Move link config tracking to link_caps
  drm/i915/dp_link_caps: Rename helper updating the link configurations
  drm/i915/dp: Factor out helper to get link rate capabilities
  drm/i915/dp_link_caps: Pass supported link rates to link caps update
  drm/i915/dp_link_caps: Add helper to print all supported link rates
  drm/i915/dp_link_caps: Add helper to get the number of supported link
    rates
  drm/i915/dp_link_caps: Add helper to get common rate index
  drm/i915/dp_link_caps: Move tracking of common rates to link_caps
    struct
  drm/i915/dp_link_caps: Track max common lane count in link_caps
  drm/i915/dp_link_caps: Use max common lane count from link_caps
  drm/i915/dp_link_caps: Add helpers to get max link limits
  drm/i915/dp_link_caps: Add helpers to set max link limits
  drm/i915/dp_link_caps: Add helper to reset max link limits
  drm/i915/dp_link_caps: Add helper to reset link_caps state
  drm/i915/dp_link_caps: Move max link limits to link_caps
  drm/i915/dp_link_caps: Pass link_caps to static functions
  drm/i915/dp_link_caps: Pass link_caps to config update/lookup helpers
  drm/i915/dp_link_caps: Pass link_caps to common rate helpers

 drivers/gpu/drm/i915/Makefile                 |   1 +
 .../drm/i915/display/intel_display_debugfs.c  |   2 +
 .../drm/i915/display/intel_display_types.h    |  32 +-
 drivers/gpu/drm/i915/display/intel_dp.c       | 272 ++-----
 drivers/gpu/drm/i915/display/intel_dp.h       |   6 +-
 .../gpu/drm/i915/display/intel_dp_link_caps.c | 675 ++++++++++++++++++
 .../gpu/drm/i915/display/intel_dp_link_caps.h |  47 ++
 .../drm/i915/display/intel_dp_link_training.c | 320 +--------
 drivers/gpu/drm/i915/display/intel_dp_test.c  |   7 +-
 .../gpu/drm/i915/display/intel_dp_tunnel.c    |   6 +-
 drivers/gpu/drm/xe/Makefile                   |   1 +
 11 files changed, 854 insertions(+), 515 deletions(-)
 create mode 100644 drivers/gpu/drm/i915/display/intel_dp_link_caps.c
 create mode 100644 drivers/gpu/drm/i915/display/intel_dp_link_caps.h

-- 
2.49.1