drm/i915: Simplify the link training functions

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Split the prepare, link training, fallback-handling steps into their own
functions for clarity and as a preparation for the upcoming LTTPR
changes.

While at it also:
- Unexport and inline intel_dp_set_idle_link_train(), which is used at a
  single place.
- Add some documentation to functions that are exported or that can use
  a better description about which part of the LT sequence they
  implement.

v2: (Ville)
- Unexport/inline intel_dp_set_idle_link_train()
- Make the documentation of
  intel_dp_prepare_link_train()/intel_dp_stop_link_train() more accurate
  wrt. HW specific details.

Cc: Ville Syrjälä <ville.syrjala@linux.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/20201007170917.1764556-3-imre.deak@intel.com

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This commit is contained in:

Imre Deak 2020-10-07 20:09:13 +03:00

parent 6777a855d6

commit 0a5991f5d0

3 changed files with 79 additions and 30 deletions

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7

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

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2

drivers/gpu/drm/i915/display/intel_dp.h

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100

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

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