drm/i915/dp: Sanitize intel_dp_get_link_train_fallback_values()

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Reduce the indentation in intel_dp_get_link_train_fallback_values() by
adding separate helpers to reduce the link rate and lane count. Also
simplify things by passing crtc_state to the function.

This also prepares for later patches in the patchset adding a limitation
on how the link params are reduced.

While at it use lt_dbg()/lt_err() for debug/error prints in the function
which will also print the connector/encoder prefix and add a debug print
about reducing the link parameters.

v2:
- Align reduce_lane_count()'s error handling flow with
  reduce_link_rate(). (Ville, Jani)
- Use lt_dbg()/lt_err() in the function.

Cc: Jani Nikula <jani.nikula@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Imre Deak <imre.deak@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240610164933.2947366-5-imre.deak@intel.com

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This commit is contained in:

Imre Deak 2024-06-10 19:49:16 +03:00

parent dd1eae474e

commit 9eb4aab86a

1 changed files with 56 additions and 36 deletions

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94

drivers/gpu/drm/i915/display/intel_dp_link_training.c

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